Coal feeder and distribution type accurate coal feeding system

Abstract

The utility model discloses a coal feeder which comprises a coal feeder body, the coal feeder body comprises a shell and a conveyor located in the shell, one end of the shell is provided with a coal inlet, and the other end of the shell is provided with a coal outlet. The coal inlet and the coal outlet are formed in the two opposite sides of the shell respectively, and fire coal input into the coal feeder through the coal inlet is conveyed to the coal outlet through the conveyor and discharged through the coal outlet. The coal feeder further comprises an N-way coal falling pipe, wherein N is larger than or equal to 3. The N-way coal falling pipe comprises a feeding port and N-1 discharging ports arranged opposite to the feeding port, the feeding port is communicated with the coal discharging port, and fire coal received from the feeding port can be sent out through any discharging port. The utility model further discloses a distribution type accurate coal feeding system comprising the coal feeder.

Description

Technical Field

[0001] The utility model relates to the technical field of coal distribution, in particular to a coal feeder and a distribution type precise coal feeding system. Background Art

[0002] The conventional coal feeding system includes at least two coal distribution devices, each of which includes a coal bunker and a coal feeder arranged below the coal bunker. The coal bunker of one of the coal distribution devices is configured to supply coal to the coal feeder of the adjacent coal distribution device in addition to supplying coal to its own coal feeder. To this end, a coal diversion system is provided between the one coal distribution device and the adjacent coal distribution device, the coal diversion system including a diversion coal hopper and a diversion coal feeder, one end of the diversion coal hopper is connected to the coal bunker of the one coal distribution device, and the other end is connected to the coal inlet of the diversion coal feeder, while the coal outlet of the diversion coal feeder is connected to the coal feeder of the adjacent coal distribution device, thereby realizing the diversion and distribution of coal from the coal bunker of one coal distribution device to the coal feeder of the adjacent coal distribution device.

[0003] The above-mentioned coal diversion system requires the use of a diversion coal hopper, and at the same time, it is necessary to open an orifice on the coal bunker, and weld the diversion coal hopper to the coal bunker by welding or other methods. On the one hand, the process is complicated due to the need to open an orifice on the coal bunker. On the other hand, the diversion coal hopper is large in size and heavy in weight, which makes it very difficult and complicated to connect the diversion coal hopper to the coal bunker. Moreover, due to the large weight of the diversion coal hopper, the welding parts are prone to cracking under the weight of the diversion coal hopper, and there is even a risk of the diversion coal hopper falling off. In addition, due to the complex process, difficult connection and large size of the diversion coal hopper, the installation and manufacturing costs are very high. Therefore, there is a demand in the industry for a coal diversion system with further improved performance in all aspects. Utility Model Content

[0004] The utility model aims to overcome the defects of traditional technologies and aims to provide a coal feeder and a distribution type precise coal feeding system, which have simple structure and installation process, low cost and safe use, while ensuring smooth diversion of coal.

[0005] To achieve the above-mentioned purpose, according to a first aspect of the utility model, a coal feeder is provided, the coal feeder comprising a coal feeder body, the coal feeder body comprising a shell and a conveyor located in the shell, one end of the shell is provided with a coal inlet, the other end of the shell is provided with a coal outlet, the coal inlet and the coal outlet are respectively arranged on two sides of the shell opposite to each other, the coal input into the coal feeder through the coal inlet is conveyed by the conveyor to the coal outlet and discharged through the coal outlet;

[0006] The coal feeder also includes N coal dropping pipes, where N is greater than or equal to 3; the N coal dropping pipes include a feed port and N-1 discharge ports arranged opposite to the feed port, the feed port is connected to the coal discharge port, and the fuel coal received from the feed port can be delivered through any discharge port.

[0007] Preferably, the N-1 outlets include a main outlet arranged opposite to the feed inlet and N-2 branch outlets.

[0008] Preferably, the N-way coal dropping pipe is formed integrally with the coal feeder body.

[0009] Preferably, the N-way coal drop pipe is an independent component and is fixedly connected to the coal feeder body.

[0010] Preferably, the N-way coal dropping pipe is a four-way coal dropping pipe, and the diversion discharge port is arranged on both sides of the main discharge port.

[0011] According to another aspect of the utility model, a distributed precision coal feeding system is provided, comprising a first coal distribution device, wherein the first coal distribution device comprises a first coal bunker and a first coal feeder arranged below the first coal bunker, wherein the first coal feeder comprises a coal inlet and a coal outlet; wherein the first coal feeder comprises a coal inlet and a coal outlet;

[0012] The first coal feeder is equipped with N coal dropping pipes, where N is greater than or equal to 3; the N coal dropping pipes include a feed port and N-1 discharge ports arranged opposite to the feed port, the feed port is connected to the coal discharge port, and the coal received from the feed port can be delivered through any discharge port.

[0013] Preferably, the N-1 discharge ports include a main discharge port arranged opposite to the feed port and N-2 branch discharge ports, and the main discharge port is connected to a coal mill provided with the first coal distribution device.

[0014] Preferably, the distributed precision coal feeding system further comprises N-2 second coal distribution devices, each of which comprises a second coal bunker, a second coal feeder arranged below the second coal bunker, and a coal mill arranged downstream of the second coal feeder, the second coal feeder comprising a second coal inlet communicated with the second coal bunker and a second coal outlet communicated with the coal mill through a connecting pipe;

[0015] The distributed precision coal feeding system also includes N-2 coal diversion systems, each coal diversion system includes a coal inlet end and a coal outlet end, the coal inlet end is connected to one of the diversion outlets, the coal outlet end is connected to the inside of the second coal feeder of one of the second coal distribution devices, or the coal outlet end is connected to the connecting pipe of one of the second coal distribution devices.

[0016] Preferably, the coal outlet end of each coal distribution system is connected to the inside of the second coal feeder of one of the second coal distribution devices.

[0017] Preferably, the coal outlet end of each coal distribution system is communicated with the second coal inlet of the second coal feeder of one of the second coal distribution devices.

[0018] Preferably, the second coal feeder is also provided with a diverter coal inlet, and the diverter coal inlet is arranged opposite to the second coal outlet, and the coal entering from the diverter coal inlet is directly discharged from the second coal outlet; wherein the coal outlet end of each coal diversion system is connected to the diverter coal inlet of the second coal feeder of one of the second coal distribution devices.

[0019] Preferably, each coal diversion system includes a diversion coal feeder, which includes a diversion coal inlet and a diversion coal outlet, the diversion coal inlet is connected to one of the diversion outlets via a connecting channel, and the diversion coal outlet is connected to the interior of a second coal feeder of one of the second coal distribution devices via a connecting channel.

[0020] Preferably, the coal outlet end is connected to the connecting pipe of one of the second coal distribution devices, and each coal diversion system includes a diversion pipe, which is inclined, the upper end of the diversion pipe is connected to one of the diversion discharge ports, and the lower end of the diversion pipe is connected to the connecting pipe.

[0021] Preferably, a material conveying device is provided in the diversion pipe.

[0022] Preferably, the material conveying device is a scraper conveyor or a screw conveyor.

[0023] By adopting the technical solution of the utility model, it is not necessary to open an opening on the coal bunker, the structure and installation process are simple, the cost is low, and the use is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 is a front view of a distribution type precise coal feeding system according to a first embodiment of the utility model;

[0026] Figure 2 is a perspective view of a distribution type precise coal feeding system according to a first embodiment of the utility model;

[0027] Figure 3 yes Figure 1 A partial enlarged view of the middle part A;

[0028] Figure 4is a top view of a distribution type precise coal feeding system according to a first embodiment of the utility model;

[0029] Figure 5 is a perspective view of a coal feeder provided in the second and third material distribution devices, wherein a guide plate and a driving mechanism thereof are provided at the discharge end of the conveyor of the coal feeder, and the guide plate is in a guide position;

[0030] Figure 6 is similar to Figure 5 A view of the invention in which the deflector is in a non-deflecting position;

[0031] Fig. 6A is a partial view illustrating a modification of the distributed precise coal feeding system of the first embodiment;

[0032] Figure 7 is a front view of a distribution type precise coal feeding system according to a second embodiment of the utility model;

[0033] Figure 8 is a perspective view of a distribution type precise coal feeding system according to a second embodiment of the utility model;

[0034] Fig. 9 yes Figure 7 A partial enlarged view of the middle part A;

[0035] Fig.10 is a top view of a distribution type precise coal feeding system according to a second embodiment of the utility model;

[0036] Fig.11 It is a front view of a distribution type precise coal feeding system according to a second embodiment of the utility model, wherein the part where the material conveying device is located is partially cut away;

[0037] Fig.12 It is a partial view of a distribution type precise coal feeding system according to the second embodiment of the utility model, wherein the part where the material conveying device is located is partially cut away to illustrate the structure of the material conveying device.

[0038] Fig.13 is a front view of a distribution type precision coal feeding system according to a second embodiment of the utility model, wherein the part where the material conveying device is located is partially cut away; and

[0039] Fig.14 It is a partial view of a distribution type precise coal feeding system according to the second embodiment of the utility model, wherein the part where the material conveying device is located is partially cut away to illustrate the structure of the material conveying device. DETAILED DESCRIPTION

[0040] The following is a detailed description of the distributed precise coal feeding system of the utility model in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the utility model are merely illustrative and are only used to illustrate the principle of the utility model rather than to limit the utility model.

[0041] See first Figures 1 to 4 ,in Figure 1 is a front view illustrating the overall structure of a distribution type precise coal feeding system according to a first embodiment of the utility model; Figure 2 yes Figure 1 A perspective view of the distributed precision coal feeding system is shown. Figure 3 yes Figure 1 A partial enlarged view of the middle part A, Figure 4 1 is a top view of the distributed precise coal feeding system according to the first embodiment of the utility model. Figure 1 and Figure 2 As shown, the distributed precision coal feeding system includes a first coal distribution device 100, a second coal distribution device 200 and a third coal distribution device 300 which are adjacently arranged. The second and third coal distribution devices have the same structure, including a coal bunker 1 and a coal feeder 2 arranged below the coal bunker 1, and a coal mill 33 is arranged below the coal feeder 2.

[0042] The coal bunker 1 comprises a coal bunker body 3 at the upper part and a coal outlet hopper 4 at the lower part. In the illustrated embodiment, the coal bunker body 3 is cylindrical, and the coal outlet hopper 4 is conical, with the diameter gradually decreasing from top to bottom, and the lower end is a coal outlet.

[0043] See also Figure 2 The coal feeder 2 is arranged below the corresponding coal bunker 1 and is used to receive the coal delivered from the coal bunker. The coal feeder weighs the received coal and delivers the coal to downstream devices such as the coal mill 33. The coal feeder includes a coal inlet 5 and a coal outlet 6. The coal from the coal bunker is input into the coal feeder 2 through the coal inlet 5. The coal feeder delivers the received coal to downstream devices such as the coal mill 33 through the coal outlet 6. The coal feeder can adopt a conventional belt conveyor or a scraper conveyor, etc., and its structure is well known to those skilled in the art, and its description is omitted here.

[0044] The gate door 7 can be arranged on the communication passage connecting the coal bunker 1 and the coal feeder 2 to control the connection and closing of the communication passage. When the communication passage is connected, the coal bunker supplies coal to the coal feeder, and when the communication passage is closed, the coal bunker stops supplying coal. The gate door can adopt a conventional gate door, and its structure is well known to those skilled in the art, and its description is omitted here.

[0045] In addition, a gate door 8 may be provided on the communication passage connecting the coal feeder 2 and the coal mill 33, and the gate door 8 is used to control the connection and closing of the communication passage connecting the coal feeder 2 and the coal mill 33. Similar to the gate door 7, the gate door 8 may adopt a conventional gate door, and its structure is well known to those skilled in the art, and its description is omitted here.

[0046] Continue to see Figure 1 and Figure 2 The first coal distribution device 100 includes a coal bunker 101 and a coal feeder 102 disposed below the coal bunker 101, and a coal mill 33 is disposed below the coal feeder 102. The coal bunker 101 includes a coal bunker body 103 located at the upper part and a coal outlet hopper 104 located at the lower part. In the illustrated embodiment, the coal bunker body 103 is cylindrical; the coal outlet hopper 104 is conical, with a pipe diameter gradually decreasing from top to bottom, and the lower end is a coal outlet.

[0047] The coal feeder 102 is arranged below the corresponding coal bunker 101 and is used to receive the coal distributed from the coal bunker. The coal feeder weighs the received coal and delivers the coal to downstream devices such as the coal mill 33. The coal feeder 102 includes a coal inlet 105 and a coal outlet 106. The coal from the coal bunker is input into the coal feeder 102 through the coal inlet 105, and the coal feeder 102 delivers the received coal to the downstream device through the coal outlet 106. The coal feeder can adopt a conventional belt conveyor or a scraper conveyor, etc., and its structure is well known to those skilled in the art, and its description is omitted here.

[0048] The gate door 177 is arranged on the communication passage connecting the coal bunker 101 and the coal feeder 102, and is used to control the connection and closing of the communication passage. When the communication passage is connected, the coal bunker supplies coal to the coal feeder, and when the communication passage is closed, the coal bunker stops supplying coal. The gate door 177 can adopt a conventional gate door, and its structure is well known to those skilled in the art, and its description is omitted here.

[0049] According to the technical solution of the utility model, the coal distribution device 100 is designed to supply coal to the coal feeder 2 of the adjacent coal distribution devices 200 and 300 through the coal feeder 102 in addition to supplying coal to its own coal feeder 102. Figure 1 , Figure 2 and Figure 3 To this end, a coal diversion system 9 is provided between the coal feeder 102 of the first coal distribution device 100 and the coal feeder 2 of the second coal distribution device 200 and between the coal feeder 102 of the first coal distribution device 100 and the coal feeder 2 of the third coal distribution device 300, respectively. The coal diversion system between the coal feeder 102 of the first coal distribution device and the coal feeder 2 of the second coal distribution device and the coal diversion system between the coal feeder 102 of the first coal distribution device and the coal feeder 2 of the third coal distribution device are structurally the same.

[0050] See also Figure 1-Figure 3 The coal diversion system 9 includes a four-way coal drop pipe 10 and a diversion coal feeder 11. The four-way coal drop pipe 10 includes a feed port 61 at the upper part and discharge ports 62, 63 and 65 at the lower part arranged opposite to the feed port 61. The feed port 61 is connected to the coal outlet 106 of the coal feeder 102; the discharge port 62 is arranged in the center, and the discharge ports 63 and 65 are symmetrically arranged on both sides thereof. The discharge port 62 is connected to the coal mill 33 of the first coal distribution device 100 located below through a connecting pipe 66. A gate door 67 is arranged on the connecting passage connecting the discharge port 62 and the coal mill 33 to control the connection and closing of the connecting passage.

[0051] The left and right split coal feeders 11 are respectively arranged below the discharge ports 63 and 65, and their feed ports 69 are respectively connected to the discharge ports 63 and 65 of the four-way coal drop pipe 10 and receive the coal distributed through the discharge ports 63 and 65. The split coal feeder weighs the received coal and conveys the coal to the split coal inlet (described below) of the coal feeder 2 located below through its discharge port 70. The split coal feeder can adopt a conventional belt conveyor or a scraper conveyor, etc., and its structure is well known to those skilled in the art, and its description is omitted here.

[0052] The gate doors 71 are respectively disposed on the communication passages 68 connecting the discharge ports 63 and 65 with the feed port 69 of the split coal feeder 11, so as to control the connection and closing of the communication passages.

[0053] See also Figure 5 According to the utility model, the coal feeders 2 of the second and third coal distribution devices 200 and 300 are provided with a split coal inlet 57, and the split coal inlet 57 is connected to the discharge port 70 of the split coal feeder 11 of the coal split system 9 via a connecting channel 112, such as Figure 1 and Figure 5 The split coal inlet 57 is arranged substantially opposite to the discharge port 6 of the coal feeder 2 in the vertical direction, so that the coal entering from the split coal inlet can be directly discharged from the coal discharge port 6 of the coal feeder 2 .

[0054] As a preferred solution, Figure 2 As shown, a gate door 77 may be provided on the communication passage 112 between the coal outlet 70 of the split coal feeder 11 and the split coal inlet 57 of the coal feeder 2 to control the connection and closing of the communication passage.

[0055] Continue to see Figure 5After the coal is fed into the coal feeder 2 through the coal feeder 2 split flow inlet 57, it is directly discharged from the coal outlet 6 of the coal feeder 2. The coal outlet end of the conveyor of the coal feeder 2, such as the belt conveyor as described above, is adjacent to the coal outlet 6 and is located near the coal feeder 2 split flow inlet 57. Figure 5 and Figure 6 As shown. Therefore, the falling coal may hit the conveyor belt at the coal outlet end of the belt conveyor, which may easily cause damage to the conveyor belt. In order to prevent this from happening, as a preferred solution, a guide plate 19 can be set at the coal outlet end of the coal feeder 2, see Figure 5 and Figure 6 The guide plate 19 is arranged to be rotatable about an axis 23 extending substantially perpendicularly to the direction in which the coal is fed by the coal feeder 2 and can be positioned in two positions:

[0056] When the first coal distribution device 100 supplies coal to the coal feeder 2 via the coal diversion system 9, the guide plate is in the diversion position (or protection position). In this diversion position, the guide plate 19 blocks the conveyor belt of the coal feeder 2 to provide protection, so that the falling coal cannot hit the conveyor belt, and at the same time provides a diversion effect for the coal fed from the diversion coal inlet 57. Figure 5 As shown;

[0057] When the second or third coal distribution device 200 or 300 supplies coal to the coal feeder 2, the guide plate is in a non-guiding position. In this non-guiding position, the coal feeder 2 operates normally, and the guide plate does not affect the transmission of the coal. Figure 6 shown.

[0058] The guide plate 19 can be in the form of a bent plate, an arc-shaped plate, a flat plate or other forms. The specific structure is not particularly limited as long as it can play the expected role.

[0059] Continue to see Figure 5 and Figure 6 , which illustrates a specific method of the guide plate and its driving mechanism. Figure 5 and Figure 6As shown, the shaft 23 of the guide plate is rotatably mounted on the housing of the coal feeder 2, and the guide plate 19 is fixedly connected to the shaft 23 and rotates therewith. One axial end of the shaft 23 is fixedly connected to the driving connecting rod 24, and the driving connecting rod is formed with a long slot 25 extending along the length of the rod; a pin is provided at one end of the driving rod 226 adjacent to the driving connecting rod, and one end of the driving rod is connected to the driving connecting rod 24 by inserting the pin in the long slot. The driving device 27 can be a pneumatic driving device, a hydraulic driving device or an electric driving device, and is used to make the driving rod 226 move linearly and telescopically, thereby realizing the rotation of the guide plate and positioning it in the diversion position, the non-diversion position or the intermediate position between the diversion position and the non-diversion position (when the coal feeder 2 is supplied with coal by the coal distribution device 100 and the coal distribution device 200 or 300). Figure 5 The deflector 19 is shown in the deflector position, and Figure 6 The deflector 19 is shown in a non-deflecting position.

[0060] To maintain the guide plate, Figure 5 and Figure 6 As shown, an opening 32 can be provided at the axial end of the coal feeder 2 adjacent to the coal outlet 6, and the opening is closed by a door 33. When the guide plate needs to be maintained, the shaft can be pulled out and the guide plate can be taken out from the opening 32 of the coal feeder 2.

[0061] By adopting the technical solution of the first embodiment of the utility model, the distribution type precise coal feeding system can realize different coal feeding modes: the coal feeder 2 is fed with coal by the corresponding coal distribution device 200 or 300, the coal feeder 2 is fed with coal by the coal distribution device 100, and the coal feeder 2 is fed with coal by both the coal distribution device 100 and the coal distribution device 200 or 300. In the case that the coal distribution device 100 and the coal distribution devices 200 and 300 store different types of coal respectively, the coal feeder 2 can be fed with the first type of coal by the coal distribution device 200 or 300, or the second type of coal by the coal distribution device 100, and can also be fed with a blend of the first type of coal and the second type of coal by the coal distribution device 100 and the coal distribution device 200 or 300, so as to meet different needs.

[0062] The operation of the distributed precision coal feeding system of the utility model is described in detail below. It is assumed that the first coal distribution device 100 stores high-quality coal with a high calorific value, and the second and third coal distribution devices 200 and 300 store low-quality coal with a low calorific value. During the low-peak period of electricity consumption, the second and third coal distribution devices use their own coal feeders to transport low-quality coal to the corresponding units to maintain the operation of the units; when there is a peak in electricity consumption and it is necessary to increase the power generation, the first coal distribution device 100 supplies high-quality coal to the units corresponding to the second and third coal distribution devices through the coal diversion system 9 to improve the power generation capacity of the units, increase the power supply of the power grid to stabilize the normal operation of the power grid. Therefore, the technical solution of the utility model realizes that the second and third coal distribution devices 200 and 300 can obtain high-quality coal from the first coal distribution device 100 during the peak period of electricity consumption, so that the second and third coal distribution devices 200 and 300 can switch between high and low peak conditions of electricity consumption.

[0063] In the technical solution described above, the first coal distribution device 100 supplies coal to the diversion coal inlet 57 of the coal feeder 2 via the coal diversion system 9, but the present invention is not limited to this, but may also adopt such a solution: the first coal distribution device 100 supplies coal to the coal inlet 5 of the coal feeder 2 via the coal diversion system 9.

[0064] See also Fig. 6A , Fig. 6A 1 is a partial view showing a modification of the first embodiment. The modification differs from the first embodiment only in that the coal diversion system 9 supplies coal to the coal inlet 5 of the coal feeder 2. Fig. 6A As shown, the discharge port 70 of the split coal feeder 11 of the coal splitting system 9 is connected to the connecting channel 218 connecting the coal bunker 1 and the coal inlet 5 of the coal feeder 2 via the connecting channel 222; thus, the coal received by the split coal feeder 11 is transported into the split pipe 222 via the discharge port 70, and the coal is transported to the connecting channel 218 via the split pipe 222, and then enters the coal feeder 2 via the coal inlet 5 of the coal feeder 2. Other aspects of this modified embodiment are the same as those of the first embodiment, and their description is omitted here.

[0065] Please refer to the attached Figure 7 -Attached Fig.14 The distributed precision coal feeding system of the second embodiment of the utility model is described. The main structure of the distributed precision coal feeding system of the second embodiment of the utility model is basically the same as that of the first embodiment. Therefore, the same components are indicated by the same figure marks and their descriptions are omitted. Only the differences between the two are explained below.

[0066] Similar to the first embodiment, according to the technical solution of the second embodiment of the utility model, as Figure 7 and Figure 8As shown, the distribution type precise coal feeding system comprises a first coal distribution device 100, a second coal distribution device 200 and a third coal distribution device 300 which are arranged adjacent to each other. The second and third coal distribution devices have the same structure, including a coal bunker 1 and a coal feeder 2 arranged below the coal bunker 1, and a coal mill 33 is arranged below the coal feeder 2; the coal feeder 2 is used to receive the coal distributed from the corresponding coal bunker 1, weigh the received coal and transport the coal to downstream devices such as the coal mill 33.

[0067] The first coal distribution device 100 is designed to supply coal to the coal feeder 102 thereof and the coal mill 33 arranged below, and also to supply coal directly to the coal mill 33 arranged in the adjacent coal distribution device, see Figure 7-Figure 8 . To this end, a coal diversion system 80 is provided between the coal feeder 102 of the first coal distribution device 100 and the coal mill 33 of the second coal distribution device 200, and between the coal feeder 102 of the first coal distribution device 100 and the coal mill 33 of the third coal distribution device 300; the coal diversion system between the coal feeder 102 of the first coal distribution device and the coal mill 33 of the second coal distribution device is the same as the coal diversion system between the coal feeder 102 of the first coal distribution device and the coal mill 33 of the third coal distribution device. The difference between the distributed precision coal feeding system of the second embodiment of the utility model and the first embodiment is reflected in the coal diversion system. Therefore, only the coal diversion system of the second embodiment will be described below.

[0068] like Figure 8-Figure 9 As shown, the coal diversion system 80 includes a four-way coal drop pipe 90 and diversion pipes 91 and 98. The four-way coal drop pipe 90 includes an upper feed port 191 and lower discharge ports 92, 93 and 95 arranged opposite to the feed port 191. The feed port 191 is connected to the coal outlet of the coal feeder 102; the discharge port 92 is arranged in the center, and the discharge ports 93 and 95 are symmetrically arranged on both sides thereof. The discharge port 92 is connected to the coal mill 33 of the first coal distribution device 100 located below through a connecting pipe 96, and a gate door 97 is arranged on the connecting channel connecting the discharge port 92 and the coal mill 33 to control the connection and closing of the connecting channel.

[0069] The left and right two shunt pipes 91 and 98 are arranged obliquely, the upper end of the shunt pipe 91 is connected to the discharge port 93, and the lower end of the shunt pipe 91 is connected to the connecting pipe 130 connecting the coal mill 33 and the coal feeder 2 of the second coal distribution device 200; the upper end of the shunt pipe 98 is connected to the discharge port 95, and the lower end of the shunt pipe 98 is connected to the connecting pipe 99 connecting the coal mill 33 and the coal feeder 2 of the third coal distribution device 300. Therefore, the coal coming out of the discharge port 93 can be transported to the coal mill 33 of the second coal distribution device 200 via the shunt pipe 91 and the connecting pipe 130, and the coal coming out of the discharge port 95 can be transported to the coal mill 33 of the third coal distribution device 300 via the shunt pipe 98 and the connecting pipe 99.

[0070] like Figure 8 and Fig. 9 As shown, the gate doors 131 are respectively disposed on the shunt pipes 91 and 98 to control the connection and closing of the shunt pipes 91 and 98 .

[0071] As a preferred technical solution, a material conveying device may be provided inside the diverter pipes 91 and 98 to achieve smooth conveyance of the fuel coal.

[0072] See first Fig.11 and Fig.12 ,in Fig.11 is a front view of the distributed precision coal feeding system of the second embodiment, wherein the part where the material conveying device is located is partially cut away; Fig.12 FIG. 1 is a partial view of the distributed precise coal feeding system of the second embodiment, wherein the part where the material conveying device is located is partially cut away to illustrate the structure of the material conveying device. Fig.11 and Fig.12 As shown, the material conveying device 201 is arranged in the branch pipes 91 and 98, and is used to convey the coal supplied from the discharge port 93 or 95 to the coal mill 33 of the second and third coal distribution devices. Fig.11 and Fig.12 As shown, the material conveying device 201 can adopt a conventional scraper conveyor, the structure of which is well known to those skilled in the art, and its description is omitted here. In order to convey the material, the conveyor belt of the scraper conveyor can rotate counterclockwise or clockwise, but from the perspective of improving the conveying efficiency, it is preferred to rotate clockwise. Fig.12 As shown for reference, the conveyor belt of the scraper conveyor in the diverter duct 91 rotates counterclockwise, and the conveyor belt of the scraper conveyor in the diverter duct 98 rotates clockwise.

[0073] See next Fig.13 and Fig.14 ,in Fig.13 is a front view of the distributed precision coal feeding system of the second embodiment, wherein the part where the material conveying device is located is partially cut away; Fig.142 is a partial view of the distributed precise coal feeding system of the second embodiment, wherein the part where the material conveying device is located is partially cut away to illustrate the structure of the material conveying device. The material conveying device 202 can be a conventional screw conveyor. Fig.13 and Fig.14 The figure shows a structural form of a screw conveyor, which includes a driving device such as a motor 203 and its transmission device, a driving shaft 205, and a spiral blade 206 arranged on the driving shaft. During operation, the driving device drives the driving shaft 205 to rotate through the transmission device, and the driving shaft 205 drives the spiral blade 206 arranged thereon to rotate, thereby realizing the transportation of coal.

[0074] It should be noted here that when a material conveying device is arranged inside the diverter pipes 91 and 98, the diverter pipes 91 and 98 need to adopt different cross-sectional shapes according to the different material conveying devices adopted. For example, when a scraper conveyor is adopted as the material conveying device, the cross-sectional shape of the diverter pipes 91 and 98 can be rectangular, and when a screw conveyor is adopted as the material conveying device, the cross-sectional shape of the diverter pipes 91 and 98 can be circular.

[0075] In the technical solution described above, a coal distribution device is designed so that its own coal feeder supplies coal to the coal feeders of two adjacent coal distribution devices through a coal diversion system. The utility model is not limited thereto, but may also adopt the following solution: a coal distribution device is designed so that its own coal feeder supplies coal to the coal feeders of one or more adjacent coal distribution devices through a coal diversion system.

[0076] According to the technical solution of the utility model, a coal distribution device is designed so that its own coal feeder supplies coal to the coal feeder of the adjacent coal distribution device through the coal diversion system. As a preferred solution, the specification or conveying capacity of the coal feeder of the one coal distribution device is greater than the specification or conveying capacity of the coal feeder of the adjacent coal distribution device to meet the coal demand of the adjacent coal distribution device.

[0077] According to the technical solution of the utility model, the coal diversion system includes N coal drop pipes, where N is greater than or equal to 3. The N coal drop pipes can be formed integrally with the coal feeder, or can be a separate component fixedly connected to the coal feeder.

[0078] In the first embodiment described above, the coal-fired diversion system adopts a diversion coal feeder; and in the second embodiment, the coal-fired diversion system adopts a diversion pipe. However, the utility model is not limited thereto. For example, the coal-fired diversion system of the first embodiment may also adopt the diversion pipe adopted by the coal-fired diversion system of the second embodiment. Similarly, the coal-fired diversion system of the second embodiment may also adopt the diversion coal feeder adopted by the coal-fired diversion system of the first embodiment.

[0079] The utility model is described above with reference to the accompanying drawings in conjunction with specific embodiments, but this is only for the purpose of illustration, and the utility model is not limited thereto. Therefore, it is obvious to 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 to belong to the scope of the utility model, and the scope of the utility model is limited by the technical solution claimed and its equivalent solution.

Claims

1. A coal feeder, comprising a coal feeder body, the coal feeder body comprising a shell and a conveyor located in the shell, one end of the shell is provided with a coal inlet, the other end of the shell is provided with a coal outlet, the coal inlet and the coal outlet are respectively provided on two sides of the shell opposite to each other, the coal input into the coal feeder through the coal inlet is conveyed by the conveyor to the coal outlet and discharged through the coal outlet; It is characterized in that The coal feeder also includes N coal dropping pipes, where N is greater than or equal to 3; the N coal dropping pipes include a feed port and N-1 discharge ports arranged opposite to the feed port, the feed port is connected to the coal discharge port, and the fuel coal received from the feed port can be delivered through any discharge port.

2. The coal feeder according to claim 1, characterized in that: The N-1 discharge ports include a main discharge port arranged opposite to the feed port in a positive direction and N-2 branch discharge ports.

3. The coal feeder according to claim 1, characterized in that: The N-way coal dropping pipe is formed integrally with the coal feeder body.

4. The coal feeder according to claim 1, characterized in that: The N-way coal dropping pipe is an independent component and is fixedly connected to the coal feeder body.

5. The coal feeder according to claim 2, characterized in that: The N-way coal dropping pipe is a four-way coal dropping pipe, and the branch discharge port is arranged on both sides of the main discharge port.

6. A distributed precision coal feeding system, comprising a first coal distribution device, wherein the first coal distribution device comprises a first coal bunker and a first coal feeder arranged below the first coal bunker, wherein the first coal feeder comprises a coal inlet and a coal outlet; characterized in that: The first coal feeder is equipped with N coal dropping pipes, where N is greater than or equal to 3; the N coal dropping pipes include a feed port and N-1 discharge ports arranged opposite to the feed port, the feed port is connected to the coal discharge port, and the coal received from the feed port can be delivered through any discharge port.

7. The distributed precise coal feeding system according to claim 6, characterized in that: The N-1 discharge ports include a main discharge port arranged opposite to the feed port and N-2 branch discharge ports, and the main discharge port is connected to the coal mill equipped with the first coal distribution device.

8. The distributed precise coal feeding system according to claim 7, characterized in that: The distributed precision coal feeding system further includes N-2 second coal distribution devices, each of which includes a second coal bunker, a second coal feeder arranged below the second coal bunker, and a coal mill arranged downstream of the second coal feeder, the second coal feeder including a second coal inlet connected to the second coal bunker and a second coal outlet connected to the coal mill through a connecting pipe; The distributed precision coal feeding system also includes N-2 coal diversion systems, each coal diversion system includes a coal inlet end and a coal outlet end, the coal inlet end is connected to one of the diversion outlets, the coal outlet end is connected to the inside of the second coal feeder of one of the second coal distribution devices, or the coal outlet end is connected to the connecting pipe of one of the second coal distribution devices.

9. The distributed precise coal feeding system according to claim 8, characterized in that: The coal outlet end of each coal distribution system is connected to the inside of the second coal feeder of one of the second coal distribution devices.

10. The distributed precise coal feeding system according to claim 9, characterized in that: The coal outlet end of each coal distribution system is communicated with the second coal inlet of the second coal feeder of one of the second coal distribution devices.

11. The distributed precise coal feeding system according to claim 9, characterized in that: The second coal feeder is also provided with a diversion coal inlet, which is arranged opposite to the second coal outlet, and the coal entering from the diversion coal inlet is directly discharged from the second coal outlet; wherein the coal outlet end of each coal diversion system is connected to the diversion coal inlet of the second coal feeder of one of the second coal distribution devices.

12. The distributed precise coal feeding system according to claim 9, characterized in that: Each coal diversion system includes a diversion coal feeder, which includes a diversion coal inlet and a diversion coal outlet. The diversion coal inlet is connected to one of the diversion outlets via a connecting channel, and the diversion coal outlet is connected to the interior of a second coal feeder of one of the second coal distribution devices via a connecting channel.

13. The distributed precise coal feeding system according to claim 8, characterized in that: The coal outlet end is connected to the connecting pipe of one of the second coal distribution devices. Each coal diversion system includes a diversion pipe, which is arranged obliquely. The upper end of the diversion pipe is connected to one of the diversion outlets, and the lower end of the diversion pipe is connected to the connecting pipe.

14. The distributed precise coal feeding system according to claim 13, characterized in that: The diverter pipe is provided with a material conveying device.

15. The distributed precise coal feeding system according to claim 14, characterized in that: The material conveying device is a scraper conveyor or a screw conveyor.

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