Coal dropping pipe with adjustable direction of discharge port

Abstract

The utility model discloses a coal dropping pipe with adjustable discharge port orientation, which comprises a blanking pipe, the blanking pipe comprises a feed port positioned at the upper end and a discharge port positioned at the lower end, the feed port is used for receiving distributed materials, and the materials flow through the blanking pipe and are discharged through the discharge port; the discharging pipe comprises a main body pipe section and a lower end pipe section, the main body pipe section and the lower end pipe section are detachably connected with each other, and the lower end pipe section can be adjusted in the circumferential direction relative to the circumferential installation position of the main body pipe section, so that adjustment of the direction of a discharging port of the discharging pipe is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to material distribution technical field, especially a coal drop pipe with adjustable discharge port orientation. BACKGROUND

[0002] The coal drop pipe is one of the main devices of the coal transfer station of the thermal power plant, and usually includes two discharge pipes, which include a feeding port at the upper end and a discharge port at the lower end. The coal drop pipe also includes a coal distribution mechanism, which is arranged to selectively distribute the material received from the upstream to one of the two discharge pipes. During the operation of the coal drop pipe, the coal falls along the discharge pipe, and the material flowing out of the discharge port of the discharge pipe falls onto the belt of the conveyor belt conveyor, and is sent to the downstream by the conveyor belt conveyor. Due to various factors, including, for example, the running speed of the conveyor belt machine that transports the material to the coal drop pipe, the size of the material particles, the moisture content of the material, the positioning of the guide plate arranged at the feeding port of the coal drop pipe, etc., when the coal drop pipe is assembled and put into use, the main stream 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 conveyor belt conveyor, which will have a serious impact on the transportation of the material.

[0003] Therefore, there is a need for a coal drop pipe with further improved material transportation performance in the industry. SUMMARY

[0004] The utility model aims at overcoming the defects of the prior art, and aims to provide a coal drop pipe, which can effectively ensure that the main stream of the material flowing out of the discharge port of the discharge pipe falls to the middle position of the belt, thereby ensuring smooth transportation of the material, and has a simple structure and low cost.

[0005] To achieve the above-mentioned purpose, according to the utility model, a coal drop pipe with adjustable discharge port orientation is provided, which includes a discharge pipe, the discharge pipe includes a feeding port at the upper end and a discharge port at the lower end, the feeding port is used to receive the distributed material, and the material flows through the discharge pipe and is sent out through the discharge port; characterized in that,

[0006] The discharge pipe includes a main pipe section and a lower end pipe section, the main pipe section and the lower end pipe section are detachably connected to each other, and the circumferential mounting position of the lower end pipe section relative to the main pipe section can be adjusted along the circumference, thereby realizing the adjustment of the orientation of the discharge port of the discharge pipe.

[0007] Preferably, the upper end of the lower end pipe section is provided with a first flange, a plurality of first connecting holes are formed on the first flange in a circumferential direction; the lower end of the main pipe section is provided with a second flange, a plurality of second connecting holes are formed on the second flange in a circumferential direction, the main 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 blanking pipe is adjusted through the circumferential displacement of the first connecting holes relative to the second connecting holes.

[0008] Preferably, the first connecting holes on the first flange are uniformly spaced in a circumferential direction, and the second connecting holes on the second flange are uniformly spaced in a circumferential direction.

[0009] Preferably, 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 main pipe section are formed as waist holes.

[0010] 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.

[0011] Preferably, the lower end pipe section is a bent pipe.

[0012] Preferably, the bent pipe is a single-segment bent pipe or the bent pipe is composed of multiple segments.

[0013] The technical scheme of the utility model, by the blanking pipe is divided into main pipe section and lower end pipe section, and the main pipe section and the lower end pipe section are detachably connected, and the circumferential installation position of the lower end pipe section relative to the main pipe section can be adjusted in a circumferential direction, the orientation of the discharge port of the blanking pipe can be adjusted, so that the main flow of the material flowing out of the discharge port of the blanking pipe can be effectively ensured to fall to the middle position of the belt, and the smooth conveying of the material to the downstream is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further explained in detail below in combination with the drawings and examples, wherein

[0015] Figure 1 is a perspective view, which illustrates the overall structure of the material transfer device according to the utility model;

[0016] Figure 2 is a perspective view, which illustrates the overall structure of the material transfer device according to the utility model from another angle;

[0017] Figure 3 is a partial perspective view, which illustrates the lower end pipe section of the blanking pipe matched with the main pipe section;

[0018] Figure 4 is a perspective view of a lower end section of a downcomer pipe;

[0019] Figure 5 is a view similar to Figure 3 , illustrating from another angle the lower end section of the downcomer pipe mated with the main body section;

[0020] Figure 6 is a perspective view of the main body sections of two downcomer pipes;

[0021] Figure 7 is a front view of a material transfer device according to the present application;

[0022] Figure 7A is a partial plan view, illustrating the dosing mechanism in one working position;

[0023] Figure 7B is a partial plan view, illustrating the dosing mechanism in another working position

[0024] Figure 8 is a partial plan view, illustrating the drive means of the dosing mechanism;

[0025] Figure 9 is a partial perspective view, illustrating the dosing mechanism and its drive means as well as the arc-shaped deflector plate;

[0026] Figure 9A is Figure 9 a top view of the partial structure shown in

[0027] Figure 10 is a partial perspective view, illustrating one structure of the drive means of the dosing mechanism; and

[0028] Figure 11 is a partial perspective view, illustrating another structure of the drive means of the dosing mechanism. DETAILED DESCRIPTION

[0029] 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 explain the principles of the present application and not to limit the present application.

[0030] First, reference is made to Figure 1 and Figure 2 which illustrate in perspective view the overall structure of the material transfer device according to the present application, the material including but not limited to coal and the like. As Figure 1 and Figure 2As shown, the material transfer device includes a material conveying belt conveyor 1, a coal drop pipe 70, and a transfer belt conveyor 90, etc. The coal drop pipe 70 is used to receive the material conveyed by the material conveying belt conveyor 1 and the like, and to deliver the received material to a downstream device, such as the transfer belt conveyor 90. The coal drop pipe 70 includes two drop pipes 2, each of which includes a feeding port 3 at an upper end and a discharging port 4 at a lower end; a material distribution mechanism 10 (see Figure 7 ) is arranged upstream of the drop pipes to selectively distribute the received material to one of the two drop pipes. The material flowing out of the discharging port 4 of the drop pipe is dropped onto the belt of the transfer belt conveyor 90 and is conveyed downstream by the transfer belt conveyor 90.

[0031] 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 drop pipe is in the form of a curved pipe, which is curved towards the running direction of the upper belt section of the transfer belt conveyor 90. The curved pipe can be a single-segment curved pipe or a multi-segment curved pipe, as shown in Figures 3-5 , the specific structure can be selected according to the specific application; in addition, the shape of the discharging port at the lower end of the curved pipe can be selected as any suitable shape according to the actual application. By using a curved pipe designed in a curved shape, on the one hand, the coal flow will impact the curved pipe section before flowing out of the discharging port of the drop pipe, so that the curved pipe section can play a buffering role for the coal flow; on the other hand, the flow direction of the material flowing out of the discharging port of the drop pipe forms an acute angle with the running direction of the upper belt section, thereby reducing the impact of the material on the belt. Compared with the case where the material flowing out of the discharging port of the drop pipe falls almost vertically on the belt of the belt conveyor, the impact and damage of the material on the belt are reduced.

[0032] Due to various factors, including, for example, the running speed of the material conveying belt conveyor 1, the size of the material particles, the moisture content of the material, the positioning of the flow guide plate 36 provided at the feeding port of the coal drop pipe (if provided, see Figure 9 ), etc., when the coal drop pipe is assembled and put into use, the main flow of the material flowing out of the discharging port of the drop pipe may not fall to the middle position of the belt of the transfer belt conveyor 90, which will have a serious impact on the conveying of the material.

[0033] In order to avoid the above situation, according to the first aspect of the present application, as Figure 1As shown, the feed pipe 2 includes 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 that are detachably connected to each other. The circumferential installation position of the lower end pipe section relative to the main pipe section can be adjusted circumferentially, thus forming a coal drop pipe with an adjustable discharge port position. By adjusting the circumferential position of the lower end pipe section relative to the main pipe section, the position of the feed pipe discharge port can be adjusted, thereby ensuring that the main stream of material flowing out of the feed pipe discharge port falls to the middle position of the conveyor belt, thus ensuring the smooth conveying of materials.

[0034] Therefore, such as Figures 3-5 in particular Figure 4 As shown, a flange 221 is formed at the upper end of the lower end pipe section 22, and a connection hole 222 is formed on the flange 221; correspondingly, as Figure 5 As shown, main pipe section 21 ( Figures 3-5 The lower end of the pipe section 22 (showing only a portion of the main pipe section) is provided with a flange 211, and a connection hole 212 is formed on the flange 211. This allows for a detachable connection between the lower end pipe section and the main pipe section via the connection holes 222 and 212 on the flanges 221 and 211, as well as bolts and nuts. To facilitate circumferential adjustment of the lower end pipe section 22 relative to the main pipe section 21, connection holes evenly spaced circumferentially can be formed on both the flanges 221 and 211. The number of connection holes on one flange is set to be a multiple of the number of connection holes on the other flange, such as 1, 2, 3, etc. For example, flange 221 may have 12 connection holes, while flange 211 may have 12, 24, or 36 connection holes, etc. In this case, the minimum angle for circumferential adjustment of the lower end pipe section 22 relative to the main pipe section 21 corresponds to the interval angle between the connection holes on the flange with a large number of connection holes. Thus, the minimum angle for circumferential adjustment of the lower end pipe section can be controlled by controlling the circumferential interval angle between the connection holes on the flange.

[0035] It should be noted that while it is preferable that the connecting holes on flanges 221 and 211 are evenly spaced circumferentially, this is not mandatory. Various other methods can be used to achieve a detachable connection between the main pipe section 21 and the lower pipe section 22, as well as to adjust the circumferential installation position of the lower pipe section relative to the main pipe section. For example, an elongated arc hole can be formed on flange 221 every 120 degrees, with a circumferential span of, for example, 20 degrees. On flange 211, a group of, for example, three circular holes corresponding to one of the elongated arc holes can be formed every 120 degrees. In actual connection, as long as at least one of the three circular holes is within the range of the elongated arc hole, a detachable connection between the lower pipe section and the main pipe section, as well as circumferential adjustment of the lower pipe section relative to the main pipe section, can be achieved.

[0036] As a preferred technical solution, as shown in Figure 4 The connecting holes on the flanges 221 of the lower end pipe section 22 and / or the flanges 211 of the lower pipe body section 21 are formed as waist holes, so that in addition to the circumferential installation position adjustment of the lower end pipe section by circumferential displacement of the connecting holes, fine adjustment of the circumferential installation position can also be achieved by means of the waist holes, so that the lower end pipe section 22 can achieve more accurate adjustment of the circumferential installation position.

[0037] In the above-described solution, the body pipe section and the lower end pipe 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 thereto, and various other solutions can be used. For example, an inner sleeve can be provided at the lower end of the body pipe section, and the upper end of the lower end pipe section is formed as an outer sleeve. During connection, the inner sleeve at the lower end of the body pipe section is inserted into the outer sleeve at the upper end of the lower end pipe section, and then a clamp is used to fix the connection part of the body pipe section and the lower end pipe section, which can also achieve the same purpose.

[0038] During operation of the coal drop pipe, the material is distributed to one of the two lower pipes by the batching mechanism and is transported to the belt of the conveyor belt conveyor 90 through the lower pipe. During the material transport through the lower pipe, the material usually does not fill the entire lower pipe (here, the cross section), and in most cases, only occupies 1 / 3-1 / 4 of the cross section of the lower pipe. The rapidly falling material will impact a specific part of the lower pipe wall, i.e., the lower wall of the lower pipe relative to the direction of gravity, and generate friction with the pipe wall, thereby causing damage and wear of the pipe wall at this part. In the case of a lower pipe with an integral structure, when the pipe wall damage and wear reach a certain degree, the entire lower pipe needs to be replaced, thereby greatly increasing the equipment cost and prolonging the downtime.

[0039] 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 lower pipe 2 adopts a multi-section (i.e., two sections or more than two sections) form, i.e., the lower pipe 2 includes multiple pipe sections, thereby constituting a multi-section coal drop pipe. The lower pipe 2 shown in the figure includes four pipe sections, i.e., a square-round section pipe section 25, a truncated cone pipe section 26, a cylindrical pipe section 27, and a lower end pipe section 22. The adjacent pipe sections of the multiple pipe sections are detachably connected. The specific connection method can use the technical means described above in connection with the first aspect of the utility model, and the description thereof is omitted for brevity. In the present application and other parts, the multiple pipe sections include two pipe sections and more than two pipe sections.

[0040] The second aspect of the utility model is particularly suitable for a blanking pipe comprising rotationally symmetrical pipe sections. The rotationally symmetrical pipe sections are pipe sections that can be connected to adjacent pipe sections without changing the geometry of the blanking pipe, even if they are rotated by a certain angle relative to the adjacent pipe sections. The angle can be, but is not limited to, +90 degrees, +180 degrees, -90 degrees, +120 degrees, -120 degrees, etc. The rotationally symmetrical pipe sections are detachably connected to the adjacent pipe sections, and the circumferential mounting position can be adjusted relative to the adjacent pipe sections. The specific connection and adjustment method can be the technical means described above in connection with the first aspect of the utility model. For the sake of brevity, the description thereof is omitted.

[0041] In the blanking pipe shown in Figure 2 and Figure 6 , the square-round section pipe section 25, the truncated cone pipe section 26, and the circular pipe section 27 are rotationally symmetrical pipe sections. For the square-round section pipe section 25, it can be rotated by an angle of +90 degrees, +180 degrees, or -90 degrees relative to the adjacent pipe section, i.e. the conical pipe section 26, without changing the geometry of the blanking pipe. For the truncated cone pipe section 26 and the circular pipe section 27, they can be rotated by any angle relative to the adjacent pipe section without changing the geometry of the blanking pipe. In the illustrated embodiment, the lower end pipe section 22 is a non-rotationally symmetrical pipe section, but the utility model is not limited thereto. The lower end pipe section 22 can also be a rotationally symmetrical pipe section, such as a cylindrical pipe section.

[0042] As described above, Figure 1 , Figure 2 and Figure 6 The blanking pipe shown in,, and comprises three rotationally symmetrical pipe sections, i.e. the square-round section pipe section 25, the truncated cone pipe section 26, and the circular pipe section 27. However, this is merely an example. The blanking pipe of the utility model can be divided in other forms. For example, the square-round section pipe section 25 and the truncated cone pipe section 26 can be combined into one rotationally symmetrical pipe section, or the truncated cone pipe section 26 and the circular pipe section 27 can be combined into one rotationally symmetrical pipe section, or the square-round section pipe section 25, the truncated cone pipe section 26, and the circular pipe section 27 can be combined into one rotationally symmetrical pipe section. In addition, the blanking pipe can also be divided into more than three rotationally symmetrical pipe sections.

[0043] According to the second aspect of the utility model, when the degree of wear of the inner wall of the blanking pipe cannot meet the further use requirements, if the wear occurs in the rotationally symmetrical pipe section, the connection between the rotationally symmetrical pipe section and the adjacent pipe section can be detached, the rotationally symmetrical pipe section can be rotated by a certain angle, such as +90 degrees, +180 degrees, or -90 degrees, relative to the adjacent pipe section, so that the non-worn inner wall of the rotationally symmetrical pipe section occupies the position of the worn inner wall, and then the rotationally symmetrical pipe section and the adjacent pipe section are fixedly connected together. If the wear occurs in the non-rotationally symmetrical pipe section, the non-rotationally symmetrical pipe section can be detached and replaced with a new one.

[0044] By this way, for the rotationally symmetrical pipe section, theoretically, it can be rotated three times or more, so as to improve the anti-wear effect by at least three times; for the non-rotationally symmetrical pipe section, the replacement after wear is limited to a certain local pipe section. Therefore, by adopting the technical solution of 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.

[0045] The third aspect of the present application will be described below with reference to Figure 2 and Figure 6 . As shown in Figure 2 , in order to prevent the falling material in the downpipe from causing dust flying and polluting the environment during the operation of the material transfer device, a tunnel-type 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.

[0046] According to the third aspect of the present application, in addition to arranging the tunnel-type 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. For this purpose, as shown in Figure 2 , 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.

[0047] 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, thereby playing a dust suppression role to a certain extent.

[0048] As a preferred technical solution, the end of the negative pressure self-dust suppression air guide pipe 7 connected with the dust cover is in the form of a flared opening, as shown in Figure 2 , thereby appropriately enhancing the suction effect. 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 solution to arrange the connecting hole 28 at a position away from the coal flow, and for this purpose, 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.

[0049] The negative pressure self-dust-suppression air duct 7 can be used in combination with the drop tube according to the second aspect of the present application. In this case, if the connecting holes 28 on the drop tube are located on a rotationally symmetrical tube segment, such as the frustoconical tube segment 26, as shown in Figure 6 , a plurality of circumferentially spaced connecting holes can be provided on the frustoconical tube segment 26, Figure 6 The frustoconical tube segment 26 shown in the middle view is provided with four connecting holes. In this way, when the rotationally symmetrical tube segment is adjusted in circumferential installation position due to internal wear, the negative pressure self-dust-suppression air duct 7 can be connected with the connecting holes in the corresponding orientation. For the connecting holes 28 that are not used in operation, they can be plugged with a cover 29. As for the arrangement position of the connecting holes 28 in the height direction of the drop tube, the present application does not make a special limitation, and the middle position and the position above the middle position of the drop tube are more preferred. In addition, as a preferred solution, a filter screen can be provided at the communication port 71 on the dust cover and at the connecting holes 28 on the drop tube 2 to prevent coal cinder and the like from entering the negative pressure self-dust-suppression air duct 7.

[0050] As described above, the coal drop pipe includes a dosing mechanism arranged upstream of the drop tube, to selectively distribute the received material to one of the two drop tubes. The dosing mechanism according to the fourth aspect of the present application will be described below in combination with Figures 7-11 , and Figure 7 , and Figure 7A As shown, the dosing mechanism 10 includes a flow guide pipe barrel 11, the upper end of the flow guide pipe barrel being a feed inlet 71, the lower end of the flow guide pipe barrel being a discharge outlet 72, and the upper part of the flow guide pipe barrel 11 being pivotally mounted on a support. The support can be embodied in various forms, such as a housing form enclosing the drop tube feed inlet 3 and the flow guide pipe barrel 11, and more commonly a tee 12 as shown in Figure 8 , Figure 9 , and Figure 10 , Figure 11 In the case where the tee 12 is used as the support, as shown in Figure 9 , the tee 12 can include a feed port 31 and discharge ports 32 and 33, and the two discharge ports 32 and 33 are respectively connected in communication with the feed inlets 3 of the two drop tubes 2. In the technical solution of the present application, the support should be understood in a broad sense, which includes various fixed structures of the coal drop pipe.

[0051] As an example of the mounting manner of the flow guide pipe barrel 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 barrel 11 is arranged on the upper part of the flow guide pipe barrel 11, and the pin shaft 13 constitutes a pivot shaft about which the flow guide pipe barrel 11 pivots, and a corresponding mounting hole 14 is formed in the support (i.e. the tee 12 in the embodiment) (see Figure 8), by which the draft tube cylinder 11 can be pivotally mounted on the support, so that the draft tube cylinder 11 can swing to both sides around the pivot, thus the draft tube cylinder 11 can be called a pendulum draft tube cylinder; as a preferred technical solution, the pin shaft 13 or the pivot shaft is mounted in the mounting hole of the support through a bearing.

[0052] In the embodiment, the dosing mechanism 10 is embodied in the form of the draft tube cylinder 11, but the specific geometry of the draft tube cylinder is not particularly limited in the present application, which can be a straight cylinder, such as the cylindrical shape shown in the figure, a polygonal cylinder with a polygonal cross section, etc., or a tapered cylinder, such as a conical cylinder, a polygonal conical cylinder with a polygonal cross section, etc., or a tube with an asymmetric cross section, etc., as long as it can smoothly distribute the received material to the two discharge pipes. The inlet and outlet of the draft tube cylinder can be of any shape, for example, the inlet is square and the outlet is circular, the inlet is oval and the outlet is circular, etc.; as a preferred solution, the cross section of the inlet is larger than that of the outlet.

[0053] In order to distribute the received material to one of the two discharge pipes, the draft tube cylinder 11 is arranged to be able to swing between two working positions under the drive of the driving device: in the first working position, the outlet of the draft tube cylinder 11 is aligned with the inlet of one of the two discharge pipes; in the second working position, the outlet of the draft tube cylinder 11 is aligned with the inlet of the other of the two discharge pipes. Figure 7A and Figure 7B respectively show the draft tube cylinder 11 in two different working positions.

[0054] The driving device for driving the draft tube cylinder 11 to swing between the two working positions can take 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 take the form of, for example, a pneumatic driving device, a hydraulic driving device, an electro-hydraulic driving device or an electric driving device, etc., to make the driving rod 16 linearly extend and retract, Figure 8 Fig. 2 shows the driving rod 16 in the retracted state, while Figure 9 Fig. 3 shows the driving rod 16 in the extended state. As shown in Figure 8 and Figure 9 , a pin shaft 17 is provided on the lower outer wall of the draft tube cylinder 11, which is preferably arranged parallel to the pivot shaft around which the draft tube cylinder 11 pivots.

[0055] Please refer to Figure 10 , which shows a form of the driving device. As shown in Figure 10As shown, the driving device 15 is rotatably mounted on the mounting bracket 52 through the rotating shaft 51, and the mounting bracket 52 is fixedly mounted on the bracket. 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 draft tube cylinder 11 through the hinged hole. 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 in the first working position or the second working position.

[0056] Please refer to Figure 11 , which illustrates another form of the driving device. As shown, 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 in the first working position or the second working position.

[0057] 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 rotating center 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.

[0058] 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 setting 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.

[0059] Regarding the fourth aspect of the present application, the essence lies in that the dosing 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, such as a rectangular opening formed on the bracket, can also be adopted, as long as the movement of the pin shaft 17 is not interfered.

[0060] In the shown embodiment, the drive device is arranged outside the support or housing, but the application is not limited thereto. As an alternative, the drive device can also be arranged inside the support or housing, in which case the arcuate slot for allowing the movement of the pin shaft 17 can also be omitted. Furthermore, in the shown embodiment, the tee 12 serves as a support base for components such as the pin shaft 13, the mounting supports 52, 55, etc., but according to the application, the tee can also be omitted, in which case the components such as the pin shaft 13, the mounting supports 52, 55, etc. supported on the tee as a support base can be supported on other parts of the support, such as the following pipe as a support base.

[0061] As a preferred solution, an arcuate flow guide plate 36 can be arranged at the inlet of the coal drop pipe, which has an open surface facing the material distributed from the upstream, for guiding the material into the flow guide pipe cylinder 11. As shown in Figure 7 and Figure 9 The material conveying belt machine 1 conveys the material to the inlet 37, and the material leaving the material conveying belt machine 1 collides on the arcuate flow guide plate 36, and then flows downward along the arcuate flow guide plate into the flow guide pipe cylinder 11. The flow guide plate shown in the figure is arcuate, but the application is not limited thereto, and the flow guide plate can have any other structure with a groove-shaped cross section, and the baffles or wings on both sides of the flow guide plate have 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, i.e. the cross section gradually decreases, thereby achieving the effect of converging and regulating the flow.

[0062] As shown in Figure 7 , Figure 9 and Figure 9A As a preferred solution, the arcuate flow guide plate 36 is pivotally mounted on the support and can rotate about the pivot, for adjusting the position of the arcuate 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 Figure 7 , Figure 9 and Figure 9A A plurality of axially spaced lugs 39 are arranged on the back of the arcuate flow guide plate 36, and holes are formed in the lugs. Shafts 40 extend through the holes in the lugs and are fixedly connected to the holes, so that the shafts rotate together with the arcuate flow guide plate 36, and the two ends of the shafts 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 arcuate 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, it can be locked by means of a locking nut. In addition, the arcuate 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 drive device as the flow guide pipe cylinder 11 can be used to rotate the arcuate flow guide plate 36, and the description thereof is omitted here.

[0063] Although it is a preferred scheme to set the guide plate at the inlet of the coal drop pipe, the guide plate can also be omitted. In addition, as a modified scheme, the dosing mechanism 10 can include both the guide pipe cylinder 11 and the arc-shaped guide plate 36, that is, the arc-shaped guide plate is a component of the dosing mechanism 10 and extends upward along the guide pipe cylinder, and the guide pipe cylinder and the arc-shaped guide plate are fixedly connected or integrally formed. In addition, as shown in Figs. Figure 1 and Figure 9 As a modified scheme, the housing 50 at the inlet 37 of the coal drop pipe can also be omitted.

[0064] In the above part of the application, the technical schemes 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 scheme alone or can be combined to constitute a corresponding combined technical scheme.

[0065] 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 to be protected and its equivalent schemes.

Claims

1. A coal drop pipe with adjustable outlet orientation, 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 to be dispensed, the material flowing through the drop pipe and being dispensed through the outlet; characterized in that, the drop pipe comprises a main pipe section and a lower end pipe section, the main pipe section and the lower end pipe section being detachably connected to each other, the lower end pipe section being adjustable in circumferential mounting position relative to the main pipe section, thereby allowing adjustment of the outlet orientation of the drop pipe.

2. The coal drop pipe with adjustable orientation of the discharge opening according to claim 1, characterized in that, an upper end of the lower end pipe section is provided with a first flange, the first flange being formed with a plurality of circumferentially spaced first connection holes; a lower end of the main pipe section is provided with a second flange, the second flange being formed with a plurality of circumferentially spaced second connection holes, the main pipe section and the lower end pipe section being connected by means of the first connection holes, the second connection holes and bolts and nuts, and the outlet orientation of the drop pipe being adjusted by means of circumferential displacement of the first connection holes relative to the second connection holes.

3. The coal drop pipe with adjustable orientation of the discharge opening according to claim 2, characterized in that, the first connection holes on the first flange are uniformly spaced in circumferential direction, and the second connection holes on the second flange are uniformly spaced in circumferential direction.

4. The coal drop pipe with adjustable orientation of the discharge opening according to claim 2 or 3, characterized in that, the first connection holes on the first flange of the lower end pipe section and / or the second connection holes on the second flange of the main pipe section are formed as waist holes.

5. The coal drop pipe with adjustable orientation of the discharge opening according to claim 3, characterized in that, the number of first connection holes is N times the number of second connection holes, where N is an integer greater than or equal to 1; or the number of second connection holes is N times the number of first connection holes, where N is an integer greater than or equal to 1.

6. The coal drop pipe with adjustable orientation of the discharge opening according to claim 1, characterized in that, the lower end pipe section is a bend pipe.

7. The coal drop pipe with adjustable orientation of the discharge opening according to claim 6, characterized in that, the bend pipe is a single-section bend pipe or the bend pipe is a bend pipe composed of multiple sections.

2. The coal drop pipe with adjustable outlet orientation according to claim 1, characterized in that, the lower end pipe section is a single-section bend pipe. the bend pipe is a single-section bend pipe or the bend pipe is a bend pipe composed of multiple sections.

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