Material transfer device

Abstract

The utility model discloses a material transfer device which comprises a coal falling pipe and a conveying belt conveyor, the coal falling pipe comprises a discharging pipe, the discharging pipe comprises a feeding port located at the upper end and a discharging port located at the lower end, the feeding port is used for receiving distributed materials, and the materials flow through the discharging pipe and are sent out through the discharging port; materials discharged from a discharging port of the discharging pipe fall onto a belt of the conveying belt conveyor, and a tunnel type dust cover is arranged above the belt of the conveying belt conveyor. The material transfer device further comprises a negative pressure self-dust-suppression air guide pipe, and the negative pressure self-dust-suppression air guide pipe is communicated with the inner space defined by the tunnel type dust cover and the inner space of the discharging pipe. Part of air mixed with dust in the inner space defined by the tunnel type dust cover enters the discharging pipe by means of negative pressure formed in the inner space of the discharging pipe when materials flow through the discharging pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to material distribution technical field, especially a kind of material transfer device. BACKGROUND

[0002] Coal transfer station is widely used in thermal power plant, usually including coal chute and the conveying belt conveyor located in the downstream of coal chute, coal chute usually includes two discharge pipes, discharge pipe includes the feed inlet at upper end and the discharge outlet at lower end;Coal chute further includes coal distribution mechanism, is equipped to selectively distribute the material received from upstream to one of two discharge pipes.During the operation of coal chute, coal falls along discharge pipe, and the material flowing out of discharge outlet of discharge pipe falls to the belt of conveying belt conveyor, and is sent to downstream by conveying belt conveyor.In order to prevent the falling material in discharge pipe from causing dust flying during the operation of material transfer device to pollute the environment, dust cover is usually arranged on the belt of conveying belt conveyor.

[0003] Although dust flying can be inhibited to a certain extent by means such as arranging dust cover to pollute the environment, but this only alleviates environmental pollution to a certain extent, and it is difficult to completely eradicate.Therefore, there is a demand for material transfer device that is more friendly to the environment in the industry. SUMMARY

[0004] The utility model aims at overcoming the defects existing in traditional technology, and the purpose is to provide a kind of material transfer device, it can further reduce the pollution of falling dust to environment by preventing dust diffusion, and simple structure, low in cost.

[0005] To achieve the above-mentioned purpose, according to the utility model, a kind of material transfer device is provided, including coal chute and conveying belt conveyor, the coal chute includes discharge pipe, the discharge pipe includes the feed inlet at upper end and the discharge outlet at lower end, the feed inlet is used to receive distributed material, the material flows through discharge pipe and is sent out via the discharge outlet;

[0006] The material sent out by the discharge outlet of the discharge pipe falls to the belt of the conveying belt conveyor, and a tunnel type dust cover is arranged above the belt of the conveying belt conveyor;

[0007] The material transfer device further includes negative pressure self-dust-suppression air duct, the negative pressure self-dust-suppression air duct is communicated with the internal space circumscribed by the tunnel type dust cover and the internal space of the discharge pipe, so that part of air mixed with dust in the internal space circumscribed by the tunnel type dust cover enters the discharge pipe by means of the negative pressure formed in the internal space of the discharge pipe when the material flows through the discharge pipe.

[0008] Preferably, the end of the negative pressure self-dust-suppression air duct connected with the tunnel type dust cover is in the form of a flared mouth.

[0009] Preferably, the connecting hole on the downcomer for connecting the negative pressure self-suppressed dust guide pipe is arranged at a position circumferentially spaced apart from the lower wall of the downcomer relative to the direction of gravity.

[0010] Preferably, a filter screen is arranged at the communication port on the tunnel dust cover for connecting the negative pressure self-suppressed dust guide pipe, and / or a filter screen is arranged at the connecting hole on the downcomer for connecting the negative pressure self-suppressed dust guide pipe.

[0011] Preferably, the coal drop pipe comprises a dosing mechanism and two downcomers, the feed inlet is used to receive the material distributed by the dosing mechanism, and the feed inlets of the two downcomers are adjacent to each other.

[0012] The dosing mechanism is arranged upstream of the two downcomers to receive the material and selectively distribute the received material to one of the two downcomers; the dosing mechanism comprises a flow guide pipe cylinder, the upper end of the flow guide pipe cylinder is the feed inlet, and the lower end of the flow guide pipe cylinder is the discharge outlet.

[0013] The dosing mechanism is pivotally mounted on the support and is arranged to be pivoted about the pivot shaft between a first working position and a second working position under the drive of the driving device; in the first working position, the discharge outlet of the flow guide pipe cylinder is aligned with the feed inlet of one of the two downcomers; in the second working position, the discharge outlet of the flow guide pipe cylinder is aligned with the feed inlet of the other of the two downcomers.

[0014] Preferably, the flow guide pipe cylinder is a straight cylindrical pipe cylinder or a conical pipe cylinder.

[0015] Preferably, the pivot shaft about which the dosing mechanism is pivoted is located at the upper portion of the flow guide pipe cylinder; two first pin shafts coaxial with and extending away from the outer wall of the flow guide pipe cylinder are arranged on the outer side of the upper portion of the flow guide pipe cylinder, the two first pin shafts constitute the pivot shaft, and mounting holes are formed in the support, and the first pin shafts are fitted in the mounting holes.

[0016] Preferably, the coal drop pipe comprises a tee joint, the tee joint comprises a feed port and two discharge ports, the two discharge ports are respectively connected to the feed inlets of the two downcomers; the flow guide pipe cylinder is located in the tee joint, and the tee joint constitutes the support.

[0017] Preferably, the driving device comprises a linearly telescopic driving rod, the driving device is rotatably mounted on the support through a rotating shaft, the front end of the driving rod is formed with a hinged hole, a second pin shaft parallel to and spaced apart from the pivot shaft of the dosing mechanism is arranged on the flow guide pipe cylinder, and the driving rod is hinged to the second pin shaft through the hinged hole.

[0018] Preferably, the driving device comprises a driving rod of linear telescopic motion, the driving device is fixedly installed on the support, the front end of the driving rod is formed with a long slot extending in a direction perpendicular to the length direction of the driving rod, and the guide tube cylinder is provided with a second pin shaft parallel to the pivot shaft of the distributing mechanism and spaced from the pivot shaft upward and downward, the second pin shaft is inserted into the long slot and connected with the driving rod.

[0019] Preferably, the driving device comprises a pneumatic driving device, a hydraulic driving device, an electro-hydraulic driving device or an electric driving device.

[0020] Preferably, the coal drop pipe further comprises a slot-shaped guide plate, the open side of the slot-shaped guide plate faces the upstream distributed material, and the slot-shaped guide plate is pivotally installed on the support and can rotate around a rotation shaft parallel to the pivot shaft to adjust the working position relative to the guide tube cylinder.

[0021] Preferably, the slot-shaped guide plate is gradually reduced in cross section from top to bottom. Preferably, the slot-shaped guide plate is an arc-shaped guide plate.

[0022] Preferably, the cross section of the feed inlet of the guide tube cylinder is larger than the cross section of the discharge outlet of the guide tube cylinder.

[0023] Preferably, the first pin shaft is fitted in the mounting hole through a bearing.

[0024] Preferably, the guide tube cylinder adopts a rotationally symmetrical structure, and the circumferential installation position of the guide tube cylinder can be adjusted in the circumferential direction, so that the non-worn inner wall of the guide tube cylinder occupies the position of the inner wall worn after a period of use.

[0025] Preferably, the angle of adjustment of the circumferential installation position of the guide tube cylinder in the circumferential direction includes +90 degrees, +180 degrees, -90 degrees, +120 degrees or -120.

[0026] Preferably, the support is formed with an arc-shaped slot with the pivot shaft as the center, and the pin shaft passes through the arc-shaped slot and is connected with the driving rod.

[0027] Preferably, the support is a three-way pipe.

[0028] Preferably, the coal drop pipe comprises a sealing structure for sealing the arc-shaped slot.

[0029] Preferably, the sealing structure comprises an arc-shaped plate strip connected with the pin shaft and rotating together with the pin shaft, the arc-shaped plate strip is a plate strip with the pivot shaft as the center, and in the connected state with the pin shaft, the arc-shaped plate strip extends from both sides of the pin shaft and always covers the arc-shaped slot, and the arc-shaped plate strip is fixedly connected with the pin shaft.

[0030] Preferably, the sealing structure comprises an arc-shaped plate connected with the pin shaft and rotating with the pin shaft, the arc-shaped plate being a plate with the pivot shaft as the center, the arc-shaped plate extending from both sides of the pin shaft and covering the arc-shaped slot in the connected state; an arc-shaped guide slot is arranged along the arc-shaped slot, the arc-shaped plate is inserted into the arc-shaped guide slot from one end of the arc-shaped guide slot, so that the inner plate surface of the arc-shaped plate abuts against the outer wall of the support, and the outer plate surface of the arc-shaped plate abuts against the inner wall of the arc-shaped guide slot; the arc-shaped plate is fixedly connected or rotatably connected with the pin shaft.

[0031] Preferably, the feeding pipe comprises a plurality of pipe segments, the plurality of pipe segments comprising at least one rotationally symmetrical pipe segment, the at least one rotationally symmetrical pipe segment being detachably connected with adjacent pipe segments, and a circumferential mounting position of the rotationally symmetrical pipe segment being adjustable along the circumference, so that a non-worn inner wall of the rotationally symmetrical pipe segment occupies a position of an inner wall worn after a period of use.

[0032] Preferably, the feeding pipe comprises a main pipe segment and a lower end pipe segment, the main pipe segment being a rotationally symmetrical pipe segment; an upper end of the main pipe segment forms the feeding inlet, and a lower end of the lower end pipe segment forms the discharging outlet.

[0033] Preferably, the feeding pipe comprises an upper pipe segment, a middle pipe segment and a lower end pipe segment, wherein the upper pipe segment and the middle pipe segment are rotationally symmetrical pipe segments.

[0034] Preferably, the upper pipe segment is composed of an upper square-round pipe segment and a lower conical pipe segment, and the middle pipe segment is a cylindrical pipe segment.

[0035] Preferably, the upper pipe segment is a square-round pipe segment, and the middle pipe segment is composed of an upper conical pipe segment and a lower cylindrical pipe segment.

[0036] Preferably, the feeding pipe comprises, from top to bottom, a square-round pipe segment, a conical pipe segment, a cylindrical pipe segment and a lower end pipe segment, wherein the square-round pipe segment, the conical pipe segment and the cylindrical pipe segment are rotationally symmetrical pipe segments.

[0037] Preferably, the lower end pipe segment is an elbow pipe.

[0038] Preferably, the at least one rotationally symmetrical pipe segment and the adjacent pipe segment are detachably connected through flanges; a plurality of circumferentially spaced first connecting holes are formed on the flange of the at least one rotationally symmetrical pipe segment; a plurality of circumferentially spaced second connecting holes are formed on the flange of the adjacent pipe segment, the at least one rotationally symmetrical pipe segment and the adjacent pipe segment are connected through the first connecting holes, the second connecting holes and bolts and nuts, and the adjustment of the circumferential mounting position of the rotationally symmetrical pipe segment is realized through the circumferential displacement of the first connecting holes relative to the second connecting holes.

[0039] Preferably, the first connecting holes are evenly spaced apart circumferentially, and the second connecting holes are evenly spaced apart circumferentially.

[0040] Preferably, the first connecting hole and / or the second connecting hole are formed as waist holes.

[0041] Preferably, the number of the first connecting holes is N times the number of the second connecting holes, where N is an integer greater than or equal to 1; or, the number of the second connecting holes is N times the number of the first connecting holes, where N is an integer greater than or equal to 1.

[0042] Preferably, the plurality of pipe segments include a lower end pipe segment, the lower end of which forms the outlet of the feed pipe; the pipe segments adjacent to the lower end pipe segment are detachably connected to each other, and the circumferential installation position of the lower end pipe segment relative to the pipe segment adjacent to the lower end pipe segment can be adjusted circumferentially, thereby realizing the adjustment of the orientation of the feed pipe outlet.

[0043] Preferably, the upper end of the lower end pipe section is provided with a first flange, and the first flange has a plurality of circumferentially spaced first connecting holes; the lower end of the pipe section adjacent to the lower end pipe section is provided with a second flange, and the second flange has a plurality of circumferentially spaced second connecting holes; the pipe section adjacent to the lower end pipe section is connected to the lower end pipe section through the first connecting holes, the second connecting holes, and bolts and nuts, and the orientation of the discharge port of the feed pipe is adjusted by circumferentially shifting the first connecting holes relative to the second connecting holes.

[0044] Preferably, the first connecting holes on the first flange are evenly spaced circumferentially, and the second connecting holes on the second flange are evenly spaced circumferentially.

[0045] Preferably, the first connection hole on the first flange of the lower end pipe section and / or the second connection hole on the second flange of the pipe section adjacent to the lower end pipe section are formed as waist holes.

[0046] Preferably, the number of first connecting holes is N times the number of second connecting holes, where N is an integer greater than or equal to 1; or, the number of second connecting holes is N times the number of first connecting holes, where N is an integer greater than or equal to 1.

[0047] The utility model discloses a dustproof cover is arranged on the lower end of the downcomer, and the dustproof cover is connected with the downcomer through the negative pressure self dust suppression air duct, and the dustproof cover is connected with the downcomer through the negative pressure self dust suppression air duct. BRIEF DESCRIPTION OF DRAWINGS

[0048] The utility model will be described in further detail below in combination with the drawings and embodiments, wherein

[0049] Figure 1 is the perspective view, and it illustrates the overall structure of the material transfer device according to the utility model;

[0050] Figure 2 is the perspective view, and it illustrates the overall structure of the material transfer device according to the utility model from another angle;

[0051] Figure 3 is the partial perspective view, and it illustrates the lower end pipe section of the downcomer matched with the main pipe section;

[0052] Figure 4 is the perspective view of the lower end pipe section of the downcomer;

[0053] Figure 5 is the view similar to Figure 3 , and it illustrates the lower end pipe section of the downcomer matched with the main pipe section from another angle;

[0054] Figure 6 is the perspective view of the main pipe section of two downcomers;

[0055] Figure 7 is the front view of the material transfer device according to the utility model;

[0056] Figure 7A is the partial plan view, and it illustrates the batching mechanism in one working position;

[0057] Figure 7B is the partial plan view, and it illustrates the batching mechanism in another working position

[0058] Figure 8 is the partial plan view, and it illustrates the driving device of the batching mechanism;

[0059] Figure 9 is the partial perspective view, and it illustrates the batching mechanism, its driving device and the arc-shaped flow guide plate;

[0060] Figure 9A is Figure 9a plan view of the illustrated partial structure;

[0061] Figure 10 is a partial perspective view illustrating one structure of a drive device of the dosing mechanism;

[0062] Figure 11 is a partial perspective view illustrating another structure of a drive device of the dosing mechanism; and

[0063] Figure 12 is a partial perspective view illustrating a sealing structure of the obturating arcuate slot. DETAILED DESCRIPTION

[0064] The material transfer device of the present application will be described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted here that the embodiments of the present application are merely illustrative and are only used to illustrate the principles of the present application and not to limit the present application.

[0065] Firstly, refer to Figure 1 and Figure 2 which illustrate the overall structure of the material transfer device according to the present application in the form of a perspective view, the material including but not limited to coal and the like. As shown in Figure 1 and Figure 2 , the material transfer device includes a material conveying belt conveyor 1, a coal drop pipe 70, and a conveyor belt conveyor 90, etc. The coal drop pipe 70 is used to receive the material conveyed by the material conveying mechanism such as the material conveying belt conveyor 1 and to convey the received material to a downstream device, such as the conveyor belt conveyor 90. The coal drop pipe 70 includes two discharge pipes 2, each of which includes a feed inlet 3 at the upper end and a discharge outlet 4 at the lower end; a dosing mechanism 10 (see Figure 7 ) is arranged upstream of the discharge pipe to selectively distribute the received material to one of the two discharge pipes. The material flowing out of the discharge outlet 4 of the discharge pipe is discharged onto the belt of the conveyor belt conveyor 90 and is conveyed downstream by the conveyor belt conveyor 90.

[0066] Please refer to Figure 1 and Figure 2 , according to the present application, as a preferred technical solution, the lower end pipe section 22 of the discharge pipe is in the form of an elbow pipe, which is curved towards the direction of travel of the upper belt section of the conveyor belt conveyor 90. The elbow pipe can be a single-section elbow pipe or a multi-section elbow pipe, such as Figures 3-5As shown, the specific structure can be selected according to the specific application; in addition, the shape of the discharge port at the lower end of the elbow pipe can be selected as any suitable shape according to the actual application. By adopting the elbow pipe designed in a curve shape, on the one hand, the coal flow falling from the discharge port of the discharge pipe will impact the elbow pipe section before flowing out, so that the elbow pipe section can play a buffering role on the coal flow; on the other hand, the flow direction of the material flowing out of the discharge port of the discharge pipe forms an acute angle with the advancing direction of the upper belt section, thereby reducing the impact of the material on the belt. Compared with the case that the material flowing out of the discharge port of the discharge pipe falls almost vertically on the belt of the belt conveyor, the impact and damage of the material on the belt are reduced.

[0067] Due to various factors, including, for example, the running speed of the material conveying belt conveyor 1, the size of the material particles, the water content of the material, the positioning of the flow guide plate 36 provided at the inlet of the coal falling pipe (if provided, please refer to Figure 9 ) and the like, when the coal falling pipe is assembled and put into use, the main flow of the material flowing out of the discharge port of the discharge pipe may not fall to the middle position of the belt of the conveying belt conveyor 90, which will seriously affect the conveying of the material.

[0068] In order to avoid the above situation, according to the first aspect of the present application, as Figure 1 shown, the discharge pipe 2 comprises a main pipe section 21 and a lower end pipe section 22, the main pipe section 21 and the lower end pipe section 22 are independent components, detachably connected to each other, and the circumferential installation position of the lower end pipe section relative to the main pipe section can be adjusted along the circumference, thereby forming a coal falling pipe with an adjustable orientation of the discharge port. By adjusting the circumferential position of the lower end pipe section relative to the main pipe section, the position of the discharge port of the discharge pipe can be adjusted, thereby ensuring that the main flow of the material flowing out of the discharge port of the discharge pipe falls to the middle position of the belt, and further ensuring the smooth conveying of the material.

[0069] Therefore, as Figures 3-5 shown, in particular Figure 4 , the upper end of the lower end pipe section 22 is formed with a flange 221, and the flange 221 is formed with a connecting hole 222; correspondingly, as Figure 5 shown, the main pipe section 21 ( Figures 3-5The lower end of the lower end pipe section 22 (only a part of the main pipe section is shown) is provided with a flange 211, and a connecting hole 212 is formed on the flange 211, so that the detachable connection between the lower end pipe section and the main pipe section can be realized through the connecting holes 222, 212 on the flanges 221, 211 and the bolts and nuts. In order to facilitate the circumferential adjustment of the lower end pipe section 22 relative to the main pipe section 21, the connecting holes can be uniformly spaced apart in the circumferential direction on the flange 221 and the flange 211 respectively, and the number of the connecting holes on one of the two flanges is set to be a multiple of the number of the connecting holes on the other flange, such as 1 times, 2 times, 3 times, etc. For example, 12 connecting holes are formed on the flange 221, and 12, 24 or 36 connecting holes, etc. can be formed on the flange 211. In this case, the minimum angle of the circumferential adjustment of the lower end pipe section 22 relative to the main pipe section 21 corresponds to the interval angle between the connecting holes on the flange with more connecting holes, so that the minimum angle of the circumferential adjustment of the lower end pipe section can be controlled by controlling the circumferential interval angle between the connecting holes on the flange.

[0070] It should be noted that although the connecting holes on the flanges 221 and 211 are uniformly spaced apart in the circumferential direction, this is a preferred scheme, but it is not necessary, and various other means can be adopted to realize the detachable connection between the main pipe section 21 and the lower end pipe section 22 and the adjustment of the circumferential installation position of the lower end pipe section relative to the main pipe section. For example, an elongated circular arc hole can be formed on the flange 221 every 120 degrees, and the circumferential span of the circular arc hole can be 20 degrees, for example; and a group of circular holes corresponding to one of the elongated circular arc holes can be formed on the flange 211 every 120 degrees, for example, and the number of the circular holes is 3. During the actual connection process, as long as at least one of the three circular holes is located within the range of the elongated circular arc hole, the detachable connection between the lower end pipe section and the main pipe section and the circumferential adjustment of the lower end pipe section relative to the main pipe section can be realized.

[0071] As a preferred technical scheme, as shown in Figure 4 The connecting holes on the flange 221 of the lower end pipe section 22 and / or the flange 211 of the main pipe section 21 are formed as waist holes, so that in addition to the circumferential installation position adjustment of the lower end pipe section through the circumferential displacement of the connecting holes, the fine adjustment of the circumferential installation position can also be realized by means of the waist holes, so that the lower end pipe section 22 can realize more accurate adjustment of the circumferential installation position.

[0072] In the above described scheme, the main tube section and the lower end tube section are detachably connected and circumferentially adjusted by connecting holes on the respective flanges and bolts and nuts, but the utility model is not limited to this, and various other schemes can be used. For example, an inner sleeve can be provided at the lower end of the main tube section, and the upper end of the lower end tube section forms an outer sleeve. When connected, the inner sleeve at the lower end of the main tube section is inserted into the outer sleeve at the upper end of the lower end tube section, and then a clamp is used to fix the connection part of the main tube section and the lower end tube section, which can also achieve the same purpose.

[0073] During the operation of the coal drop pipe, the material is distributed to one of the two discharge pipes by the distribution mechanism and is transported onto the belt of the conveyor belt conveyor 90 through the discharge pipe. During the transportation of the material through the discharge pipe, the material usually does not fill the entire cross section of the discharge pipe, and in most cases, only occupies 1 / 3-1 / 4 of the cross section of the discharge pipe. The rapidly falling material will impact a specific part of the wall of the discharge pipe, i.e., the lower wall of the discharge pipe relative to the direction of gravity, and generate friction with the wall, thereby causing damage and wear of the wall at this part. In the case of using a discharge pipe with an integral structure, when the damage and wear of the wall reach a certain degree, the entire discharge pipe needs to be replaced, thereby greatly increasing the equipment cost and prolonging the downtime.

[0074] In order to overcome this defect, according to the second aspect of the utility model, as shown in Figure 2 and Figure 6 , the provided discharge pipe 2 adopts a multi-section (i.e., two sections or more than two sections) form, i.e., the discharge pipe 2 includes multiple tube sections, thereby constituting a multi-section coal drop pipe. The discharge pipe 2 shown in the figure includes four tube sections, i.e., a square-round joint tube section 25, a truncated cone tube section 26, a cylindrical tube section 27, and a lower end tube section 22. The adjacent tube sections of the multiple tube sections are detachably connected. The specific connection method can adopt the technical means described in the foregoing in combination with the first aspect of the utility model, and the description thereof is omitted for the sake of simplicity. In the specification and other parts of the present application, the multiple tube sections include two tube sections and more than two tube sections.

[0075] The technical scheme according to the second aspect of the utility model is particularly suitable for a discharge pipe including a rotationally symmetrical tube section. The rotationally symmetrical tube section referred to in the present application refers to a tube section that can be connected with an adjacent tube section and does not change the geometric shape of the discharge pipe by rotating the tube section by a certain angle relative to the adjacent tube section in the circumferential direction. The angle includes but is not limited to +90 degrees, +180 degrees, -90 degrees, +120 degrees, or -120 degrees, etc. The rotationally symmetrical tube section and the adjacent tube section are detachably connected, and the circumferential installation position can be adjusted relative to the adjacent tube section. The specific connection and adjustment method can adopt the technical means described in the foregoing in combination with the first aspect of the utility model, and the description thereof is omitted for the sake of simplicity.

[0076] In Figure 2 andFigure 6 Among the pipe segments of the downcomer shown in FIG. 1, the square-round segment 25, the truncated-cone segment 26 and the round segment 27 are all rotationally symmetrical pipe segments. For the square-round segment 25, it can be rotated by an angle of +90 degrees, +180 degrees or -90 degrees relative to the adjacent pipe segment in the circumferential direction, and still be connected with the adjacent pipe segment, i.e. the conical segment 26, without changing the geometry of the downcomer; for the truncated-cone segment 26 and the round segment 27, they can be rotated by any angle relative to the adjacent pipe segment in the circumferential direction, and still be connected with the adjacent pipe segment without changing the geometry of the downcomer. In the illustrated embodiment, the lower end segment 22 is a non-rotationally symmetrical pipe segment, but the present application is not limited thereto, and the lower end segment 22 can also be a rotationally symmetrical pipe segment, such as a cylindrical segment.

[0077] As described above, Figure 1 , Figure 2 and Figure 6 The downcomer shown in FIG. 1 includes three rotationally symmetrical pipe segments, i.e. the square-round segment 25, the truncated-cone segment 26 and the round segment 27, but this is only an example, and the downcomer of the present application can be segmented in other forms, for example, the square-round segment 25 and the truncated-cone segment 26 can be combined into one rotationally symmetrical pipe segment, or the truncated-cone segment 26 and the round segment 27 can be combined into one rotationally symmetrical pipe segment, or the square-round segment 25, the truncated-cone segment 26 and the round segment 27 can be combined into one rotationally symmetrical pipe segment; in addition, the downcomer can also be segmented into more than three rotationally symmetrical pipe segments.

[0078] By using the technical solution according to the second aspect of the present application, when the degree of wear of the inner wall of the downcomer cannot meet the further use requirements, if the wear occurs in a rotationally symmetrical pipe segment, the connection between the rotationally symmetrical pipe segment and the adjacent pipe segment can be disassembled, the rotationally symmetrical pipe segment can be rotated by a certain angle, such as +90 degrees, +180 degrees or -90 degrees, relative to the adjacent pipe segment in the circumferential direction, so that the non-worn inner wall of the rotationally symmetrical pipe segment occupies the position of the worn inner wall, and then the rotationally symmetrical pipe segment and the adjacent pipe segment are fixedly connected together; if the wear occurs in a non-rotationally symmetrical pipe segment, the non-rotationally symmetrical pipe segment can be disassembled and replaced with a new one.

[0079] In this way, for the rotationally symmetrical pipe segment, it can be rotated theoretically three times or more, thereby improving the wear resistance by at least three times; for the non-rotationally symmetrical pipe segment, the replacement after wear is limited to a certain local pipe segment only. Therefore, by using the technical solution according to the second aspect of the present application, the cost can be greatly reduced, and the maintenance efficiency can be improved and the downtime can be reduced.

[0080] The technical solution according to the third aspect of the present application will be described below with reference to Figure 2 and Figure 6 . As Figure 2As shown, in order to prevent the material transfer device during operation, the falling material in the downpipe causes dust flying to pollute the environment, a tunnel dust cover 6 is usually arranged on the belt of the conveying belt conveyor 90, and various types of dust removal devices known to those skilled in the art can also be arranged in the dust cover 6.

[0081] According to the technical scheme of the third aspect of the utility model, in addition to arranging the tunnel dust cover 6 on the belt of the conveying belt conveyor 90, in order to further improve the dust removal effect, a negative pressure self-dust suppression air guide pipe 7 is arranged between the downpipe 2 and the dust cover 6, and the negative pressure self-dust suppression air guide pipe 7 communicates the internal space enclosed by the dust cover with the internal space of the downpipe 2. Therefore, as shown in Figure 2 As shown, one end of the negative pressure self-dust suppression air guide pipe 7 is connected with the communication port 71 formed on the dust cover, and the other end is connected with the connecting hole 28 on the downpipe 2.

[0082] As described above, during the operation of the coal falling pipe, the material flows rapidly from top to bottom through the downpipe, and due to the very fast coal flow speed, a certain degree of negative pressure is formed in the downpipe. Since the internal space enclosed by the dust cover 6 and the internal space of the downpipe 2 are communicated with each other through the negative pressure self-dust suppression air guide pipe 7, in the case of forming a certain degree of negative pressure in the downpipe 2, part of the air in the dust cover internal space which is mixed with dust will enter the downpipe through the negative pressure self-dust suppression air guide pipe 7, and after entering the downpipe, the dust carried in the air is adsorbed on the moving coal material, thereby playing a dust suppression role to a certain extent.

[0083] As a preferred technical scheme, the end of the negative pressure self-dust suppression air guide pipe 7 connected with the dust cover is in the form of a bell mouth, as shown in Figure 2 Therefore, the suction effect can be appropriately enhanced. When the material flows rapidly from top to bottom through the downpipe, it basically flows along the lower wall of the downpipe relative to the direction of gravity, and it is a preferred scheme to arrange the connecting hole 28 at a position away from the coal flow. Therefore, the connecting hole 28 on the downpipe for connecting the negative pressure self-dust suppression air guide pipe can be arranged at a position appropriately away from the lower wall of the downpipe.

[0084] The negative pressure self-dust suppression air guide pipe 7 can be used in combination with the downpipe according to the second aspect of the utility model, in which case, if the connecting hole 28 on the downpipe is located on the rotationally symmetrical pipe section, such as the truncated conical pipe section 26, as shown in Figure 6 As shown, a plurality of circumferentially spaced connecting holes can be arranged on the truncated conical pipe section 26, Figure 6The conical tube segment 26 shown in the figure is provided with four connecting holes. Thus, when the rotationally symmetrical tube segment is adjusted in the circumferential installation position due to internal wear, the negative pressure self-dust-suppression air guide pipe 7 can be connected with the connecting hole in the corresponding orientation. For the connecting hole 28 that is not used in operation, a cover 29 can be used to block it. As for the setting position of the connecting hole 28 in the height direction of the drop tube, the utility model does not make special limitations, and the middle position of the drop tube and the position above the middle are more preferred. In addition, as a preferred scheme, a filter screen can be arranged at the connecting port 71 of the dust cover and the connecting hole 28 of the drop tube 2 to prevent coal cinder and the like from entering the negative pressure self-dust-suppression air guide pipe 7.

[0085] As described above, the coal drop pipe includes a batching mechanism arranged upstream of the drop tube, which is used to selectively distribute the received material to one of the two drop tubes. The batching mechanism according to the fourth aspect of the utility model will be described below. Figures 7-11 Figure 7 As shown in Figure 7A , the batching mechanism 10 includes a flow guide pipe cylinder 11, the upper end of the flow guide pipe cylinder is a feeding port 71, the lower end of the flow guide pipe cylinder is a discharging port 72, and the upper part of the flow guide pipe cylinder 11 is pivotally installed on a support. The support can be embodied in various forms, such as a housing form surrounding the feeding port 3 of the drop tube and the flow guide pipe cylinder 11, and more commonly, a tee joint 12 as shown in Figure 8 , Figure 9 and Figure 10 , Figure 11 . In the case of using the tee joint 12 as the support, as shown in Figure 9 , the tee joint 12 can include a feeding port 31 and discharging ports 32 and 33, and the two discharging ports 32 and 33 are respectively connected with the feeding ports 3 of the two drop tubes 2. In the technical scheme of the utility model, the support should be understood in a broad sense, which includes various fixed structures of the coal drop pipe.

[0086] As an example of the installation mode of the flow guide pipe cylinder 11 on the support, as shown in Figure 7 , Figure 8 and Figure 9 , a pin shaft 13 coaxial with and extending away from the outer wall of the flow guide pipe cylinder 11 is arranged on the upper part of the flow guide pipe cylinder 11, the pin shaft 13 constitutes a pivot shaft around which the flow guide pipe cylinder 11 pivots, and a corresponding mounting hole 14 (see Figure 8 ) is formed in the support (i.e., the tee joint 12 in the embodiment), whereby the flow guide pipe cylinder 11 can be pivotally installed on the support, so that the flow guide pipe cylinder 11 can swing to both sides around the pivot shaft, and therefore the flow guide pipe cylinder 11 can be called a pendulum flow guide pipe cylinder; as a preferred technical scheme, the pin shaft 13 or the pivot shaft is installed in the mounting hole of the support through a bearing.

[0087] ​In the embodiment shown, the dosing mechanism 10 is embodied in the form of a flow guide cylinder 11, but the specific geometry of the flow guide cylinder is not particularly limited in the present application, and it can be in the form of a straight cylinder, such as a cylindrical shape, a polygonal cylinder with a polygonal cross section, and the like, or it can be in the form of a tapered cylinder, such as a conical cylinder, a polygonal conical cylinder with a polygonal cross section, and the like, or it can be in the form of a cylinder with an asymmetric cross section, and the like, as long as it can smoothly deliver the received material to the two discharge pipes. The inlet and outlet of the flow guide cylinder can be in any shape, for example, the inlet can be square and the outlet can be circular, the inlet can be oval and the outlet can be circular, and the like; as a preferred solution, the cross section of the inlet is larger than the cross section of the outlet.

[0088] In order to deliver the received material to one of the two discharge pipes, the flow guide cylinder 11 is arranged to be pivoted between two working positions under the drive of a driving device: in the first working position, the outlet of the flow guide cylinder 11 is aligned with the inlet of one of the two discharge pipes; in the second working position, the outlet of the flow guide cylinder 11 is aligned with the inlet of the other of the two discharge pipes. Figure 7A and Figure 7B respectively show the flow guide cylinder 11 in two different working positions.

[0089] The driving device for driving the flow guide cylinder 11 to pivot between the two working positions can be in various forms and is well known to those skilled in the art. As an example, please refer to Figure 10 and Figure 11 , the driving device 15 can be in the form of a pneumatic driving device, a hydraulic driving device, an electro-hydraulic driving device, or an electric driving device, and the like, for linearly extending and retracting the driving rod 16, Figure 8 Fig. 3 shows the driving rod 16 in the retracted state, while Figure 9 Fig. 4 shows the driving rod 16 in the extended state. As shown in Figure 8 and Figure 9 , a pin shaft 17 is arranged on the lower outer wall of the flow guide cylinder 11, and the pin shaft 17 is preferably arranged parallel to the pivot shaft about which the flow guide cylinder 11 is pivoted.

[0090] Please refer to Figure 10 , which shows a form of the driving device. As shown in Figure 10 , the driving device 15 is rotatably mounted on a mounting bracket 52 through a rotating shaft 51, and the mounting bracket 52 is fixedly mounted on the bracket, and the front end of the driving rod 16 is formed with a hinged hole, and the driving rod is hinged with the pin shaft 17 of the flow guide cylinder 11. During operation, the driving device drives the driving rod 16 to extend and retract, and the driving rod 16 drives the flow guide cylinder 11 to rotate through the pin shaft 17 and positions it in the first working position or the second working position.

[0091] Please refer to Figure 11which illustrates another form of the driving device. As shown in the figure Figure 11 The driving device 15 is fixedly mounted on the mounting bracket 55, and the front end of the driving rod is formed with a long slot 53 extending in a direction perpendicular to the length direction of the rod. The pin shaft 17 at the lower side of the draft tube cylinder 11 is inserted into the long slot 53 and connected with the driving rod, and the pin shaft 17 can move along the long slot 53. During operation, the driving device drives the driving rod 16 to move in an extending and retracting manner, and the driving rod 16 drives the draft tube cylinder 11 to rotate through the pin shaft 17 and positions the draft tube cylinder 11 at the first working position or the second working position.

[0092] In order to adapt to the pivoting of the draft tube cylinder 11, the bracket, such as the tee joint 12, is formed with an arc-shaped slot 20 with the center of rotation of the draft tube cylinder 11 as the center, please refer to Figure 8 、 Figure 10 and Figure 11 In the assembled state, the pin shaft 17 of the draft tube cylinder 11 passes through the arc-shaped slot and is connected with the driving rod 16.

[0093] In the above-described technical scheme of the fourth aspect of the present application, the pin shaft 13 serving as the pivoting shaft is arranged at the upper part of the draft tube cylinder 11, and the pin shaft 17 serving as the driving part is arranged at the lower part of the draft tube cylinder 11. The present application is not limited to this, but other forms can also be adopted, for example, the positions of the pin shaft 13 and the pin shaft 17 can be interchanged, in which case the arrangement position of the driving device needs to be adjusted accordingly; in addition, the pin shaft 13 can be arranged at the middle part of the draft tube cylinder 11, and the like.

[0094] Regarding the fourth aspect of the present application, the essence lies in that the batching mechanism adopts a pendulum type design form, and switches between the first working position and the second position through swinging, thereby realizing the selective distribution of the material to the two discharge pipes. Regarding the driving device, the present application is not particularly limited, and various driving devices for driving a component to pivotally rotate, which exist in the prior art and are well known to those skilled in the art, can be adopted. Regarding the arc-shaped slot, other forms can also be adopted instead, such as a rectangular opening formed on the bracket, and the like, as long as the movement of the pin shaft 17 is not interfered.

[0095] In the illustrated embodiment, the driving device is arranged outside the bracket or the shell, and the present application is not limited to this. As an alternative technical scheme, the driving device can also be arranged inside the bracket or the shell, in which case the arc-shaped slot and the like for avoiding the movement of the pin shaft 17 can also be omitted. Moreover, in the illustrated embodiment, the tee joint 12 is used as the support base for components such as the pin shaft 13, the mounting brackets 52 and 55, and the like, and according to the present application, the tee joint can also be omitted, in which case the components such as the pin shaft 13, the mounting brackets 52 and 55, and the like, which take the tee joint as the support base, can be supported on other parts of the bracket, such as the discharge pipes.

[0096] As described above for the second aspect of the present application, the rapidly falling material will impact the wall of the discharge pipe and cause friction with the pipe wall, thereby causing damage and wear to the pipe wall at this location. Similarly, when the flow guide tube 11 receives the material from upstream, its inner wall will also be impacted by the material and cause friction with the material. After long-term use, the flow guide tube needs to be replaced, thereby increasing the cost of the equipment and prolonging the downtime. Therefore, as a preferred solution, the flow guide tube 11 adopts a rotational symmetry structure, which means that the flow guide tube 11 can still be used with adjacent structures by rotating it by a certain angle (i.e., adjusting it in the circumferential direction). The angle includes but is not limited to +90 degrees, +180 degrees, -90 degrees, +120 degrees, or -120 degrees, etc. After rotating the angle, the non-worn inner wall of the flow guide tube occupies the position of the inner wall that has been worn after a period of use. In addition, in the case of the flow guide tube 11 with a rotational symmetry structure, the corresponding rotating angle direction of the flow guide tube 11 needs to be supplemented with the corresponding structure according to the specific structure of the driving device, such as the driving device shown in Figure 10 and Figure 11 , the pin shaft 13, pin shaft 17, and other structural components need to be provided.

[0097] In the case of an arc-shaped groove 20 with the center of the flow guide tube 11 as the center on the support such as the tee 12, please refer to Figure 8 , Figure 10 and Figure 11 , the coal in the support such as the tee 12 may leak out of the arc-shaped groove 20, or the coal may be stuck in the arc-shaped groove and interfere with the operation of the driving device. Therefore, as a preferred solution, a sealing structure can be provided to block the arc-shaped groove. Please refer to Figure 12 , which illustrates one form of the sealing structure, as shown in Figure 12 , the sealing structure includes an arc-shaped plate strip 80 connected with the pin shaft 13 and rotating together with it. The arc-shaped plate strip 80 is a plate strip with the center of the flow guide tube 11 as the center. In the connected state with the pin shaft 17, the arc-shaped plate strip 80 extends from both sides of the pin shaft 17 and always covers the arc-shaped groove 20, regardless of the position of the pin shaft 17 in the arc-shaped groove. In order to ensure the sealing effect, as a preferred technical solution, an arc-shaped guide groove 81 can be provided along the arc-shaped groove 20. The arc-shaped plate strip 80 is inserted into the arc-shaped guide groove 81 from one end of the arc-shaped guide groove 81. The inner plate surface of the arc-shaped plate strip 80 abuts against the outer wall of the tee 12, and the outer plate surface abuts against the inner wall of the arc-shaped guide groove 81, thereby ensuring the sealing effect of the arc-shaped plate strip 80. In the case where the arc-shaped guide groove 81 is not provided, the arc-shaped plate strip 80 is fixedly connected with the pin shaft 17; in the case where the arc-shaped guide groove 81 is provided, the arc-shaped plate strip 80 can be fixedly connected or rotatably connected with the pin shaft 17.

[0098] As a preferred technical solution, an arc-shaped flow guide plate 36 can be arranged at the feed inlet of the coal drop pipe, and an open surface thereof faces the material distributed from the upstream, so as to guide the material into the flow guide pipe cylinder 11. Figure 7 and Figure 9 As shown in the figures, the material conveying belt machine 1 conveys the material to the feed inlet 37, and the material leaving the material conveying belt machine 1 collides on the arc-shaped flow guide plate 36, and then flows downward along the arc-shaped flow guide plate into the flow guide pipe cylinder 11. The flow guide plate shown in the figures is arc-shaped, but the utility model is not limited thereto, and the flow guide plate can adopt any other structure with a groove-shaped cross section, and the baffle or wing plate on both sides of the flow guide plate has a flow regulating effect to prevent the coal flow from scattering to both sides. As a preferred solution, the flow guide plate gradually converges from top to bottom, that is, the cross section gradually decreases, so as to achieve the effect of converging and regulating flow.

[0099] As shown in the figures, Figure 7 , Figure 9 and Figure 9A As a preferred technical solution, the arc-shaped flow guide plate 36 is pivotally installed on the support and can rotate about the pivot, so as to adjust the position of the arc-shaped flow guide plate 36 relative to the flow guide pipe cylinder 11 and / or the material conveying belt machine 1, thereby facilitating the conveying of the coal flow. For this purpose, as shown in the figures, Figure 7 , Figure 9 and Figure 9A A plurality of axially spaced lugs 39 are arranged on the back of the arc-shaped flow guide plate 36, and holes are formed in the lugs. The shaft 40 extends through the holes in the lugs and is fixedly connected with the holes, so that the shaft rotates together with the arc-shaped flow guide plate 36, and the two ends of the shaft 40 are fitted into the holes formed in the side wall of the housing 50. During the operation of the coal drop pipe, the working position of the arc-shaped flow guide plate 36 is adjusted according to whether the flow guide pipe cylinder 11 is in the first working position or the second working position, and after adjustment, the arc-shaped flow guide plate 36 can be locked by, for example, a locking nut. In addition, the arc-shaped flow guide plate 36 can be sleeved on the shaft 40 through the holes in the lugs 39, and can rotate relative to the shaft 40, so that the same driving device as the flow guide pipe cylinder 11 can be used to rotate the arc-shaped flow guide plate 36, and the description thereof is omitted herein.

[0100] Although the flow guide plate arranged at the feed inlet of the coal drop pipe is a preferred solution, the flow guide plate can also be omitted. In addition, as a modification solution, the batching mechanism 10 can include both the flow guide pipe cylinder 11 and the arc-shaped flow guide plate 36, that is, the arc-shaped flow guide plate is a component part of the batching mechanism 10 and extends upward along the flow guide pipe cylinder, and the flow guide pipe cylinder and the arc-shaped flow guide plate are fixedly connected or integrally formed. In addition, as shown in the figures, Figure 1 and Figure 9 The housing 50 can also be omitted as a modification solution.

[0101] In the above part of the application, the technical solutions of the first aspect to the fourth aspect of the utility model are described respectively, and the contents of these aspects can constitute a technical solution alone, or two aspects, three aspects or four aspects among them can be combined to constitute a corresponding combined technical solution.

[0102] The utility model has been described above with reference to the drawings in combination with specific embodiments, but this is only for the purpose of illustration, and the utility model is not limited thereto. Therefore, it is obvious for those skilled in the art that various changes and modifications can be made within the technical spirit and scope of the utility model, and these changes and modifications should also be understood as belonging to the category of the utility model, and the scope of the utility model is defined by the technical scheme claimed for protection and its equivalent schemes.

Claims

1. A material transfer device, comprising a coal drop pipe and a conveying belt conveyor, the coal drop pipe comprising a drop pipe, the drop pipe comprising an inlet at an upper end and an outlet at a lower end, the inlet being configured to receive a material delivered from a material delivery device, the material flowing through the drop pipe and being discharged through the outlet; the material discharged through the outlet of the drop pipe being dropped onto a belt of the conveying belt conveyor, a tunnel dust cover being provided above the belt of the conveying belt conveyor; characterized in that the material transfer device further comprises a negative pressure self-dust-suppression air guide pipe, the negative pressure self-dust-suppression air guide pipe being in communication with an internal space defined by the tunnel dust cover and an internal space of the drop pipe, such that part of air in the internal space defined by the tunnel dust cover, which is mixed with dust, enters the drop pipe by means of a negative pressure formed in the internal space of the drop pipe when the material flows through the drop pipe. The end of the negative pressure self-dust-suppression air guide pipe connected to the tunnel dust cover is in the form of a bell mouth. The connecting hole of the drop pipe for connecting the negative pressure self-dust-suppression air guide pipe is arranged at a position circumferentially spaced apart from the lower wall of the drop pipe relative to the direction of gravity.

2. The material transfer device of claim 1, wherein, A filter screen is provided at the connecting hole of the drop pipe for connecting the negative pressure self-dust-suppression air guide pipe, and / or a filter screen is provided at the connecting hole of the drop pipe for connecting the negative pressure self-dust-suppression air guide pipe.

3. The material transfer device of claim 1, wherein, The coal drop pipe comprises a material delivery device and two drop pipes, the inlet of the drop pipe being configured to receive a material delivered from the material delivery device, the inlets of the two drop pipes being adjacent to each other.

4. The material transfer device of claim 1, wherein, The material delivery device is arranged upstream of the two drop pipes, configured to receive a material and selectively deliver the received material to one of the two drop pipes; the material delivery device comprises a flow guide pipe cylinder, the upper end of the flow guide pipe cylinder being the inlet, and the lower end of the flow guide pipe cylinder being the outlet.

5. The material transfer device of claim 1, wherein, The material delivery device is pivotally mounted on a support and is arranged to be pivoted about a pivot shaft between a first working position and a second working position under the drive of a drive device, in the first working position, the outlet of the flow guide pipe cylinder is aligned with the inlet of one of the two drop pipes; in the second working position, the outlet of the flow guide pipe cylinder is aligned with the inlet of the other of the two drop pipes. The flow guide pipe cylinder is a straight cylinder or a tapered cylinder. The pivot shaft about which the material delivery device is pivoted is located at the upper portion of the flow guide pipe cylinder.

6. The material transfer device of claim 5, wherein, An outer side of the upper portion of the flow guide pipe cylinder is provided with two first pin shafts coaxial with and extending away from the outer wall of the flow guide pipe cylinder, the two first pin shafts constituting the pivot shaft, the support is provided with a mounting hole, and the first pin shaft is fitted in the mounting hole.

7. The material transfer device of claim 5, wherein, The coal drop pipe comprises a tee joint, the tee joint comprising an inlet port and two outlet ports, the two outlet ports being respectively connected to the inlets of the two drop pipes; the flow guide pipe cylinder is located in the tee joint, and the tee joint constitutes the support.

8. The material transfer device of claim 7, wherein, The drive device comprises a linearly telescopic drive rod, the drive device is rotatably mounted on the support through a rotating shaft, a front end of the drive rod is formed with a hinged hole, a second pin shaft parallel to and spaced apart from the pivot shaft of the material delivery device is provided on the flow guide pipe cylinder, and the drive rod is hinged to the second pin shaft through the hinged hole.

9. A material transfer device according to any one of claims 5 to 8, wherein, ​ 10. The material transfer device of claim 5, wherein, ​ 11. The material transfer device of claim 5, wherein, The driving device comprises a straight telescopic driving rod, the driving device is fixedly installed on a support, a long slot extending in a direction perpendicular to the length direction of the driving rod is formed at the front end of the driving rod, a second pin shaft parallel to the pivot shaft of the dosing mechanism and spaced from the pivot shaft is arranged on the guide tube cylinder, and the second pin shaft is inserted into the long slot to be connected with the driving rod.

12. A material transfer device according to claim 10 or 11, wherein, The driving device comprises a pneumatic driving device, a hydraulic driving device, an electro-hydraulic driving device or an electric driving device.

13. The material transfer device of claim 5, wherein, The coal drop pipe further comprises a slot-shaped guide plate, the open side of the slot-shaped guide plate faces the upstream distributed material, and the slot-shaped guide plate is pivotally installed on the support and can rotate around a rotation shaft parallel to the pivot shaft to adjust the working position relative to the guide tube cylinder.

14. The material transfer device of claim 13, wherein, The slot-shaped guide plate gradually narrows from top to bottom in cross section.

15. A material transfer device according to claim 13 or 14, wherein, The slot-shaped guide plate is an arc-shaped guide plate.

16. The material transfer device of claim 5, wherein, The cross section of the feed inlet of the guide tube cylinder is larger than the cross section of the discharge outlet of the guide tube cylinder.

17. The material transfer device of claim 8, wherein, The first pin shaft is fitted in the mounting hole through a bearing.

18. The material transfer device of claim 5, wherein, The guide tube cylinder adopts a rotationally symmetric structure, the circumferential installation position of the guide tube cylinder can be adjusted along the circumference, and the non-worn inner wall of the guide tube cylinder occupies the position of the inner wall worn after a period of use.

19. The material transfer device of claim 18, wherein, The angle of adjusting the circumferential installation position of the guide tube cylinder along the circumference includes +90 degrees, +180 degrees, -90 degrees, +120 degrees or -120.

20. The material transfer device of claim 10 or 11, wherein, An arc-shaped slot with the pivot shaft as the center is formed on the support, the pin shaft passes through the arc-shaped slot and is connected with the driving rod.

21. The material transfer device of claim 20, wherein, The support is a three-way support.

22. The material transfer device of claim 20, wherein, The coal drop pipe comprises a sealing structure for sealing the arc-shaped slot.

23. The material transfer device of claim 22, wherein, The sealing structure comprises an arc-shaped plate strip connected with the pin shaft and rotating together with the pin shaft, the arc-shaped plate strip is a plate strip with the pivot shaft as the center, in the connected state with the pin shaft, the arc-shaped plate strip extends from both sides of the pin shaft and always covers the arc-shaped slot, and the arc-shaped plate strip is fixedly connected with the pin shaft.

24. The material transfer device of claim 23, wherein, The sealing structure comprises an arc-shaped plate strip connected with the pin shaft and rotating together with the pin shaft, the arc-shaped plate strip is a plate strip with the pivot shaft as the center, in the connected state with the pin shaft, the arc-shaped plate strip extends from both sides of the pin shaft and always covers the arc-shaped slot; an arc-shaped guide groove is arranged along the arc-shaped slot, the arc-shaped plate strip is inserted into the arc-shaped guide groove from one end of the arc-shaped guide groove, so that the inner plate surface of the arc-shaped plate strip abuts against the outer wall of the support, and the outer plate surface of the arc-shaped plate strip abuts against the inner wall of the arc-shaped guide groove; and the arc-shaped plate strip is fixedly connected or rotatably connected with the pin shaft.

25. The material transfer device of claim 1 or 5, wherein, The material drop pipe comprises a plurality of pipe segments, the plurality of pipe segments comprise at least one rotationally symmetric pipe segment, the at least one rotationally symmetric pipe segment is detachably connected with adjacent pipe segments, and the circumferential installation position of the rotationally symmetric pipe segment can be adjusted along the circumference, so that the non-worn inner wall of the rotationally symmetric pipe segment occupies the position of the inner wall worn after a period of use.

26. The material transfer device of claim 25, wherein, The material drop pipe comprises a main pipe segment and a lower end pipe segment, the main pipe segment is a rotationally symmetric pipe segment, the upper end of the main pipe segment forms the feed inlet, and the lower end of the lower end pipe segment forms the discharge outlet.

27. The material transfer device of claim 25, wherein, The downcomer comprises an upper pipe section, a middle pipe section and a lower end pipe section, wherein the upper pipe section and the middle pipe section are rotationally symmetrical pipe sections.

28. The material transfer device of claim 27, wherein, The upper pipe section is composed of an upper square-round pipe section and a lower conical pipe section, and the middle pipe section is a cylindrical pipe section.

29. The material transfer device of claim 27, wherein, The upper pipe section is a square-round pipe section, and the middle pipe section is composed of an upper conical pipe section and a lower cylindrical pipe section.

30. The material transfer device of claim 25, wherein, The downcomer comprises, from top to bottom, a square-round pipe section, a conical pipe section, a cylindrical pipe section and a lower end pipe section, wherein the square-round pipe section, the conical pipe section and the cylindrical pipe section are rotationally symmetrical pipe sections.

31. The material transfer device of claim 30, wherein, The lower end pipe section is a bent pipe.

32. The material transfer device of claim 25, wherein, The at least one rotationally symmetrical pipe section and the adjacent pipe section are detachably connected through flanges; a plurality of first connecting holes are formed on the flange of the at least one rotationally symmetrical pipe section in a circumferential direction; a plurality of second connecting holes are formed on the flange of the adjacent pipe section in a circumferential direction; the at least one rotationally symmetrical pipe section and the adjacent pipe section are connected through the first connecting holes, the second connecting holes and bolts and nuts, and the circumferential installation position of the rotationally symmetrical pipe section is adjusted through the circumferential displacement of the first connecting holes relative to the second connecting holes.

33. The material transfer device of claim 32, wherein, The first connecting holes are uniformly spaced in the circumferential direction, and the second connecting holes are uniformly spaced in the circumferential direction.

34. The material transfer device of claim 33, wherein, The first connecting holes and / or the second connecting holes are formed as waist holes.

35. The material transfer device of claim 33, wherein, The number of the first connecting holes is N times the number of the second connecting holes, wherein N is an integer greater than or equal to 1; or the number of the second connecting holes is N times the number of the first connecting holes, wherein N is an integer greater than or equal to 1.

36. The material transfer device of claim 25, wherein, The plurality of pipe sections comprises a lower end pipe section, a lower end of the lower end pipe section forms a discharge port of the downcomer; a pipe section adjacent to the lower end pipe section is detachably connected to the lower end pipe section, and the circumferential installation position of the lower end pipe section relative to the pipe section adjacent to the lower end pipe section can be adjusted in the circumferential direction, thereby adjusting the orientation of the discharge port of the downcomer.

37. The material transfer device of claim 36, wherein, A first flange is arranged on an upper end of the lower end pipe section, and a plurality of first connecting holes are formed on the first flange in a circumferential direction; a second flange is arranged on a lower end of the pipe section adjacent to the lower end pipe section, and a plurality of second connecting holes are formed on the second flange in a circumferential direction; the pipe section adjacent to the lower end pipe section and the lower end pipe section are connected through the first connecting holes, the second connecting holes and bolts and nuts, and the orientation of the discharge port of the downcomer is adjusted through the circumferential displacement of the first connecting holes relative to the second connecting holes.

38. The material transfer device of claim 37, wherein, The first connecting holes on the first flange are uniformly spaced in the circumferential direction, and the second connecting holes on the second flange are uniformly spaced in the circumferential direction.

39. The material transfer device of claim 38, wherein, The first connecting holes on the first flange of the lower end pipe section and / or the second connecting holes on the second flange of the pipe section adjacent to the lower end pipe section are formed as waist holes.

40. The material transfer device of claim 38, wherein, The number of the first connecting holes is N times the number of the second connecting holes, wherein N is an integer greater than or equal to 1; or the number of the second connecting holes is N times the number of the first connecting holes, wherein N is an integer greater than or equal to 1.

41. The material transfer device of claim 36, wherein, The lower end pipe section is a bent pipe.

42. The material transfer device of claim 41, wherein, The elbow is a single segment elbow or the elbow is an elbow composed of multiple segments. The elbow is a single segment elbow or the elbow is an elbow composed of multiple segments.

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