Coal discarding belt capable of controlling flow stage by stage

Abstract

The utility model belongs to the technical field of coal treatment, and discloses a coal discarding belt capable of controlling flow stage by stage, which comprises a first flow limiting mechanism, the first flow limiting mechanism is provided with a second flow limiting mechanism, the first flow limiting mechanism comprises a rotating plate, the rotating plate is rotatably connected with a plurality of rollers, and the rollers are arranged on the rotating plate. One side, far away from the roller, of the rotating plate is fixedly connected with a supporting spring; through cooperation of structures such as the first flow limiting mechanism and the second flow limiting mechanism, segmented step-by-step flow limiting of abandoned coal is facilitated, and the abandoned coal which is not blocked by the rotating plate to be decelerated when passing through the area of the first flow limiting mechanism can reach the area of the second flow limiting mechanism first; one part is blocked and decelerated by a first baffle and a second baffle which rotate by a certain angle, and the rest part firstly passes through the area of the second flow limiting mechanism and falls to the top of the end, close to the protective cover, of the climbing belt conveyor from the end, close to the protective cover, of the horizontal belt conveyor, and the operation is the first batch.

Description

Technical Field

[0001] The invention belongs to the technical field of coal processing, and specifically relates to a waste coal belt that can control the flow rate step by step in sections. Background Art

[0002] During the process of coal mining and processing, due to fluctuations in coal quality, specifications, or market demand, a certain amount of waste coal will be generated. This waste coal includes, but is not limited to, coal gangue, low-calorie coal, or coal that does not meet specific industrial standards. The efficient treatment and transportation of waste coal not only relate to the rational utilization of coal resources but also directly affect the operating costs and environmental performance of coal enterprises. Therefore, waste coal belts are needed. As an indispensable part of the coal processing system, waste coal belts are constantly evolving and innovating with the development of the coal industry towards automation and intelligence and technological innovation. A waste coal belt conveying system that can control the flow rate step by step in sections has emerged. This system realizes precise regulation of the coal flow rate by setting multiple segmented areas on the belt conveyor and equipping with independent flow control devices such as variable-frequency motors and intelligent speed governors. In different segmented areas, the conveying speed can be independently adjusted according to actual needs and changes in working conditions.

[0003] Most of the existing waste coal belts that can control the flow rate step by step in sections are prone to coal leakage because when a large amount of waste coal arrives at the entrance of the climbing waste coal belt at the same time, exceeding its capacity per stage. At the same time, during the process of waste coal from the outlet of the horizontal waste coal belt to the entrance of the climbing waste coal belt, the waste coal is likely to rush out of the belt and fall to the ground, and the waste coal is prone to collide with each other and splash out on the climbing belt conveyor. Therefore, a waste coal belt that can control the flow rate step by step in sections is proposed, which has the effect of setting multiple levels of flow diversion and preventing waste coal from rushing out of the belt and falling to the ground. Summary of the Invention

[0004] To solve the problems mentioned in the above background art, such as most of them being prone to coal leakage because when a large amount of waste coal arrives at the entrance of the climbing waste coal belt at the same time, exceeding its capacity per stage, and at the same time, during the process of waste coal from the outlet of the horizontal waste coal belt to the entrance of the climbing waste coal belt, the waste coal is likely to rush out of the belt and fall to the ground, and the waste coal is prone to collide with each other and splash out on the climbing belt conveyor, the present invention provides a waste coal belt that can control the flow rate step by step in sections.

[0005] To achieve the above object, the present invention provides the following technical solution: A waste coal belt that can control the flow rate step by step in sections, including a first flow-limiting mechanism, a second flow-limiting mechanism is arranged on the first flow-limiting mechanism, a main body mechanism is arranged on the first flow-limiting mechanism, and both the first flow-limiting mechanism and the second flow-limiting mechanism are located inside the main body mechanism;

[0006] The first current-limiting mechanism includes a rotating plate, on which several rollers are rotatably connected. On the side of the rotating plate away from the rollers, a support spring is fixedly connected, and a sliding rod is also fixedly connected. On the top of the rotating plate, a driving gear is fixedly connected, and on the top of the driving gear, a first pulley is fixedly connected. On the side of the driving gear, a rack is engaged. At one end of the rack away from the driving gear, a pushing block is fixedly connected. A first belt is slidably connected to the first pulley.

[0007] Preferably, the sliding rod is located inside the support spring. The rack and the pushing block are both located on the side of the rotating plate close to the rollers. The rack is above the pushing block, and the pushing block is provided with an inclined surface.

[0008] Preferably, the second current-limiting mechanism includes a first baffle. On the first baffle of the first baffle, several teeth are provided. On the side of the first baffle away from the teeth, a spring piece is fixedly connected. The first baffle is engaged with the teeth on the second baffle through the teeth.

[0009] Preferably, on the top of the first baffle, a driven gear is fixedly connected. On the side of the driven gear, a transmission gear is engaged. On the top of the transmission gear, a second pulley is fixedly connected. On the top of the driven gear, a third pulley is fixedly connected. A second belt is slidably connected to the third pulley.

[0010] Preferably, the outer shapes of the first baffle and the second baffle both present an "L" shape, the outer shape of the spring piece presents a "V" shape. One end of the spring piece away from the first baffle is fixedly connected to the side of the second baffle away from the teeth. The size of the transmission gear is the same as that of the driven gear. The first baffle and the second baffle are combined into a group, and there are three groups in total. On the top of the first baffle in the middle group, a third pulley is fixedly connected, and a second belt is slidably connected to the third pulley.

[0011] Preferably, one end of the first belt away from the first pulley is slidably connected to the second pulley. The size of the transmission gear is larger than that of the driving gear, and the size of the second pulley is larger than that of the first pulley.

[0012] Preferably, the main body mechanism includes a protective housing. Inside the protective housing, a horizontal belt conveyor and a climbing belt conveyor are respectively arranged. On both sides of the protective housing, sliding housings are fixedly connected. Inside the sliding housings, chutes are opened. On the top of the protective housing, a protective cover is fixedly connected, and a support plate is fixedly connected to the protective housing.

[0013] Preferably, the climbing belt conveyor is located below the end of the horizontal belt conveyor away from the sliding housing, and the protective cover is located above the end of the horizontal belt conveyor away from the sliding housing.

[0014] Preferably, the rotating plate is located above the horizontal belt conveyor. The rotating plate is rotatably connected to the inner wall of the protective housing. The roller is located on the side of the rotating plate away from the protective cover. The side of the rotating plate close to the protective cover is elastically connected to the inner wall of the protective housing through a support spring. The sliding rod is slidably connected to the inner wall of the protective housing. The bottom of the rack is slidably connected to the chute. The push block penetrates through the inner wall of the protective housing and extends above the horizontal belt conveyor.

[0015] Preferably, the first baffle is located between the horizontal belt conveyor and the support plate. The driven gear is located above the support plate. The driving gear is rotatably connected to the top of the protective housing. The first belt is located above the protective housing. The first baffle is located on the side of the rotating plate close to the protective cover. The spring piece is located on the side of the first baffle away from the protective cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] Through the cooperation of structures such as the first current-limiting mechanism and the second current-limiting mechanism, the present invention facilitates the segmented step-by-step current-limiting of the discarded coal. The discarded coal that is not blocked and decelerated by the rotating plate in the area of the first current-limiting mechanism will first reach the area of the second current-limiting mechanism. A part of it will be blocked and decelerated by the first baffle and the second baffle rotated by a certain angle, and the remaining part will first pass through the area of the second current-limiting mechanism and fall to the top of the end of the climbing belt conveyor close to the protective cover from the end of the horizontal belt conveyor close to the protective cover. This is the first batch; Subsequently, the discarded coal blocked and decelerated in the area of the second current-limiting mechanism will slowly move along the angles of the first baffle and the second baffle and then immediately fall onto the horizontal belt conveyor. This is the second batch; At the same time, the part of the discarded coal blocked and decelerated by the rotating plate will pass through the area of the first current-limiting mechanism and reach the area of the second current-limiting mechanism, and will be divided into two batches and fall onto the climbing belt conveyor at one time. The discarded coal is divided into four batches to pass through, which can ensure that the discarded coal will not exceed its capacity per stage when reaching the entrance of the climbing belt conveyor without blocking the output of the discarded coal belt in the main body mechanism, thus avoiding the occurrence of coal leakage;

[0018] Through the cooperation of structures such as the protective housing and the protective cover, the present invention facilitates the limiting of the discarded coal on the horizontal belt conveyor and the climbing belt conveyor. The setting of the protective housing can prevent the discarded coal from falling off the horizontal belt conveyor due to the blocking of the rotating plate, the first baffle and the second baffle when moving to the areas of the first current-limiting mechanism and the second current-limiting mechanism driven by the horizontal belt conveyor. At the same time, the protective covers arranged at the outlet of the horizontal belt conveyor and the inlet of the climbing belt conveyor can cooperate with the protective housing to prevent the discarded coal from rushing out of the belt and falling to the ground, and the situation that the discarded coal collides with each other and splashes out from the climbing belt conveyor. Description of the Drawings

[0019] Figure 1 Structural schematic diagram of the present invention;

[0020] Figure 2 Top view structural schematic diagram of the main mechanism of the present invention;

[0021] Figure 3 Structural relationship and mating schematic diagram of the driving gear and the driven gear of the present invention;

[0022] Figure 4 Structural relationship and mating schematic diagram of the first baffle and the spring piece of the present invention;

[0023] Figure 5 Structural relationship and mating schematic diagram of the rack and the sliding groove of the present invention;

[0024] Figure 6 Cross-sectional structural schematic diagram of the second flow-limiting mechanism of the present invention;

[0025] Figure 7 Structural relationship and mating schematic diagram of the first belt and the second belt pulley of the present invention.

[0026] In the figure: 1. First flow-limiting mechanism; 101. Rotating plate; 102. Roller; 103. Support spring; 104. Driving gear; 105. First belt pulley; 106. Rack; 107. Pusher block; 108. First belt; 109. Slide bar; 2. Second flow-limiting mechanism; 201. First baffle; 202. Teeth; 203. Spring piece; 204. Second baffle; 205. Driven gear; 206. Driving gear; 207. Second belt pulley; 208. Third belt pulley; 209. Second belt; 3. Main mechanism; 301. Protective housing; 302. Horizontal belt conveyor; 303. Sliding housing; 304. Sliding groove; 305. Protective cover; 306. Climbing belt conveyor; 307. Support plate. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] As Figures 1 to 7 shown, the present invention provides a waste coal belt that can control the flow rate in stages step by step, including a first flow-limiting mechanism 1, a second flow-limiting mechanism 2 is arranged on the first flow-limiting mechanism 1, a main mechanism 3 is arranged on the first flow-limiting mechanism 1, and both the first flow-limiting mechanism 1 and the second flow-limiting mechanism 2 are located inside the main mechanism 3;

[0029] The first current-limiting mechanism 1 includes a rotating plate 101. A plurality of rollers 102 are rotatably connected to the rotating plate 101. A support spring 103 is fixedly connected to the side of the rotating plate 101 away from the rollers 102. A slide rod 109 is fixedly connected to the side of the rotating plate 101 away from the rollers 102. A driving gear 104 is fixedly connected to the top of the rotating plate 101. A first pulley 105 is fixedly connected to the top of the driving gear 104. A rack 106 is meshed with the side of the driving gear 104. A push block 107 is fixedly connected to the end of the rack 106 away from the driving gear 104. A first belt 108 is slidably connected to the first pulley 105.

[0030] The slide rod 109 is located inside the support spring 103. Both the rack 106 and the push block 107 are located on the side of the rotating plate 101 close to the rollers 102. The rack 106 is located above the push block 107. The push block 107 is provided with an inclined surface.

[0031] The second current-limiting mechanism 2 includes a first baffle 201. A plurality of teeth 202 are provided on the first baffle 201 of the first baffle 201. A spring piece 203 is fixedly connected to the side of the first baffle 201 away from the teeth 202. The first baffle 201 is meshed with the teeth 202 on the second baffle 204 through the teeth 202. A driven gear 205 is fixedly connected to the top of the first baffle 201. A transmission gear 206 is meshed with the side of the driven gear 205. A second pulley 207 is fixedly connected to the top of the transmission gear 206. A third pulley 208 is fixedly connected to the top of the driven gear 205. A second belt 209 is slidably connected to the third pulley 208.

[0032] The outer shapes of both the first baffle 201 and the second baffle 204 are in the shape of an "L". The outer shape of the spring piece 203 is in the shape of a "V". One end of the spring piece 203 away from the first baffle 201 is fixedly connected to the side of the second baffle 204 away from the teeth 202. The size of the transmission gear 206 is the same as that of the driven gear 205. The first baffle 201 and the second baffle 204 are combined into a group, and there are three groups in total. A third pulley 208 is fixedly connected to the top of the first baffle 201 in the middle group. The second belt 209 is slidably connected to the third pulley 208. One end of the first belt 108 away from the first pulley 105 is slidably connected to the second pulley 207. The size of the transmission gear 206 is larger than that of the driving gear 104. The size of the second pulley 207 is larger than that of the first pulley 105.

[0033] Adopting the above solution: During the movement of the discarded coal, the discarded coal on both sides of the inner wall of the protective shell 301 will be blocked by the rotating plate 101, and this part of the discarded coal will drive the rotating plate 101 to rotate in the direction close to the protective cover 305 under the drive of the horizontal belt conveyor 302. At this time, the discarded coal can extend to the rotation angle of the rotating plate 101 and slide on the roller 102 under the drive of the horizontal belt conveyor 302, and slowly pass through the first current-limiting mechanism 1 area. The rotation of the rotating plate 101 will drive the first belt pulley 105 on the driving gear 104 to rotate. The rotation of the first belt pulley 105 will drive the second belt pulley 207 to rotate in the same direction through the first belt 108. The rotation of the second belt pulley 207 will drive the driven gears 205 on both sides of the support plate 307 to rotate in the opposite direction through the transmission gear 206. The reverse rotation of the driven gears 205 will drive the first baffle 201 at the bottom to rotate. At the same time, the rotation of the driven gears 205 will drive the first baffle 201 at the center position of the support plate 307 to rotate through the second belt 209 on the third belt pulley 208. The rotation of the first baffle 201 will drive the second baffle 204 engaged with it to rotate in the opposite direction through the teeth 202. The first baffle 201 and the second baffle 204 cooperate to form a certain angle, so that the channel in the second current-limiting mechanism 2 area is opened. A spring piece 203 is arranged between the first baffle 201 and the second baffle 204 to prevent the discarded coal from being stuck between the first baffle 201 and the second baffle 204 after rotation; among them, through the cooperation of structures such as the first current-limiting mechanism 1 and the second current-limiting mechanism 2, it is convenient to limit the flow of the discarded coal in stages and levels. The discarded coal that is not blocked and decelerated by the rotating plate 101 in the first current-limiting mechanism 1 area will reach the second current-limiting mechanism 2 area first, and a part of it will be blocked and decelerated by the first baffle 201 and the second baffle 204 rotated by a certain angle, and the rest will pass through the second current-limiting mechanism 2 area first and fall from the end of the horizontal belt conveyor 302 close to the protective cover 305 to the top of the end of the climbing belt conveyor 306 close to the protective cover 305. This is the first batch; then the discarded coal blocked and decelerated in the second current-limiting mechanism 2 area will slowly move along the angle of the first baffle 201 and the second baffle 204 and then fall onto the horizontal belt conveyor 302 immediately. This is the second batch; at the same time, the part of the discarded coal blocked and decelerated by the rotating plate 101 will pass through the first current-limiting mechanism 1 area and reach the second current-limiting mechanism 2 area, and will be divided into two batches and fall onto the climbing belt conveyor 306 at one time. Dividing the discarded coal into four batches can ensure that the discarded coal does not exceed its capacity per stage when reaching the entrance of the climbing belt conveyor 306 without blocking the output of the discarded coal belt in the main body mechanism 3, thus avoiding the occurrence of coal leakage.

[0034] As Figures 1 to 5As shown in the figure, the main body mechanism 3 includes a protective housing 301. Inside the protective housing 301, a horizontal belt conveyor 302 and a climbing belt conveyor 306 are respectively arranged. On both sides of the protective housing 301, sliding housings 303 are fixedly connected. Inside the sliding housings 303, sliding grooves 304 are formed. On the top of the protective housing 301, a protective cover 305 is fixedly connected. On the protective housing 301, a support plate 307 is fixedly connected. The climbing belt conveyor 306 is located below the end of the horizontal belt conveyor 302 away from the sliding housing 303, and the protective cover 305 is located above the end of the horizontal belt conveyor 302 away from the sliding housing 303.

[0035] The rotating plate 101 is located above the horizontal belt conveyor 302. The rotating plate 101 is rotatably connected to the inner wall of the protective housing 301. The roller 102 is located on the side of the rotating plate 101 away from the protective cover 305. On the side of the rotating plate 101 close to the protective cover 305, it is elastically connected to the inner wall of the protective housing 301 through a support spring 103. The sliding rod 109 is slidably connected to the inner wall of the protective housing 301. The bottom of the rack 106 is slidably connected to the sliding groove 304. The push block 107 penetrates through the inner wall of the protective housing 301 and extends above the horizontal belt conveyor 302.

[0036] The first baffle 201 is located between the horizontal belt conveyor 302 and the support plate 307. The driven gear 205 is located above the support plate 307. The transmission gear 206 is rotatably connected to the top of the protective housing 301. The first belt 108 is located above the protective housing 301. The first baffle 201 is located on the side of the rotating plate 101 close to the protective cover 305. The spring piece 203 is located on the side of the first baffle 201 away from the protective cover 305.

[0037] Adopting the above scheme: Through the cooperation of structures such as the protective housing 301 and the protective cover 305, it is convenient to limit the discarded coal on the horizontal belt conveyor 302 and the climbing belt conveyor 306. Among them, setting the protective housing 301 can prevent the situation that the discarded coal falls from the horizontal belt conveyor 302 when it moves to the first current-limiting mechanism 1 area and the second current-limiting mechanism 2 area driven by the horizontal belt conveyor 302 due to the blocking of the rotating plate 101, the first baffle 201 and the second baffle 204. At the same time, setting the protective cover 305 at the outlet of the horizontal belt conveyor 302 and the inlet of the climbing belt conveyor 306 can cooperate with the protective housing 301 to prevent the discarded coal from rushing out of the belt and falling to the ground, and the situation that the discarded coal collides with each other and splashes out from the climbing belt conveyor 306.

[0038] Working principle and usage process of the present invention: First, one end of the protective housing 301 close to the sliding housing 303 is arranged below the discharge opening of the waste coal. When the waste coal is discharged from the discharge opening and falls onto the horizontal belt conveyor 302, start the horizontal belt conveyor 302 to drive the waste coal to move in the direction close to the protective cover 305. During the movement of the waste coal, the waste coal on both sides of the inner wall of the protective housing 301 will be blocked by the rotating plate 101, and this part of the waste coal will drive the rotating plate 101 to rotate in the protective housing 301 in the direction close to the protective cover 305 under the drive of the horizontal belt conveyor 302, and compress the support spring 103. At this time, the waste coal can extend to the rotation angle of the rotating plate 101 and slide on the roller 102 under the drive of the horizontal belt conveyor 302, and slowly pass through the first current limiting mechanism 1 area. The rotation of the rotating plate 101 will drive the rotation of the driving gear 104, and the rotation of the driving gear 104 will cause the rack 106 engaged with it to move in the direction close to the horizontal belt conveyor 302, thereby driving the push block 107 to move above the horizontal belt conveyor 302, and applying a certain thrust to the waste coal blocked by the rotating plate 101 to avoid the situation of waste coal blocking in front of the rotating plate 101;

[0039] At the same time, the rotation of the driving gear 104 will drive the rotation of the first pulley 105, and the rotation of the first pulley 105 will drive the second pulley 207 to rotate in the same direction through the first belt 108. The rotation of the second pulley 207 will drive the driven gears 205 on both sides of the support plate 307 to rotate in the opposite direction through the transmission gear 206. The reverse rotation of the driven gears 205 will drive the rotation of the first baffle 201 at the bottom of it. At the same time, the rotation of the driven gears 205 will drive the rotation of the first baffle 201 at the center position of the support plate 307 through the second belt 209 on the third pulley 208. The rotation of the first baffle 201 will drive the second baffle 204 engaged with it to rotate in the opposite direction through the teeth 202. The first baffle 201 and the second baffle 204 cooperate to form a certain angle to open the channel in the second current limiting mechanism 2 area;

[0040] The discarded coal that is not blocked by the rotating plate 101 in the area of the first current-limiting mechanism 1 will reach the area of the second current-limiting mechanism 2 first. A part of it will be blocked and decelerated by the first baffle 201 and the second baffle 204 that are rotated by a certain angle. The remaining part will pass through the area of the second current-limiting mechanism 2 first and fall from one end of the horizontal belt conveyor 302 close to the protective cover 305 to the top of one end of the climbing belt conveyor 306 close to the protective cover 305, and the climbing belt conveyor 306 will be started to move away from the protective cover 305 along with the climbing belt conveyor 306. The above is the first batch; then the discarded coal blocked and decelerated in the area of the second current-limiting mechanism 2 will slowly move along the angles of the first baffle 201 and the second baffle 204 and then fall onto the horizontal belt conveyor 302 immediately. This is the second batch; at the same time, the part of the discarded coal blocked and decelerated by the rotating plate 101 will pass through the area of the first current-limiting mechanism 1 and reach the area of the second current-limiting mechanism 2. At the area of the second current-limiting mechanism 2, it will be divided into two batches and fall onto the climbing belt conveyor 306 one by one. The discarded coal is divided into four batches to pass through, ensuring that the discarded coal does not exceed its capacity per stage when reaching the entrance of the climbing belt conveyor 306 without blocking the output of the discarded coal belt in the main body mechanism 3.

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal-rejecting belt capable of segmentally and gradually controlling the flow rate, comprising a first flow-limiting mechanism (1), characterized in that: A second current limiting mechanism (2) is provided on the first current limiting mechanism (1), a main body mechanism (3) is provided on the first current limiting mechanism (1), and both the first current limiting mechanism (1) and the second current limiting mechanism (2) are located inside the main body mechanism (3); The first current limiting mechanism (1) includes a rotating plate (101), several rollers (102) are rotatably connected to the rotating plate (101), a support spring (103) is fixedly connected to the side of the rotating plate (101) away from the rollers (102), a sliding rod (109) is fixedly connected to the side of the rotating plate (101) away from the rollers (102), a driving gear (104) is fixedly connected to the top of the rotating plate (101), a first belt pulley (105) is fixedly connected to the top of the driving gear (104), a rack (106) is meshed with the side of the driving gear (104), a push block (107) is fixedly connected to the end of the rack (106) away from the driving gear (104), and a first belt (108) is slidably connected to the first belt pulley (105).

2. The coal rejection belt capable of segmentally and gradually controlling the flow rate according to claim 1, wherein: The sliding rod (109) is located inside the support spring (103), both the rack (106) and the push block (107) are located on the side of the rotating plate (101) close to the rollers (102), the rack (106) is located above the push block (107), and the push block (107) is provided with an inclined surface.

3. The coal rejection belt capable of segmentally and gradually controlling the flow rate according to claim 1, wherein: The second current limiting mechanism (2) includes a first baffle (201), several teeth (202) are provided on the first baffle (201) of the first baffle (201), a spring piece (203) is fixedly connected to the side of the first baffle (201) away from the teeth (202), and the first baffle (201) is meshed with the teeth (202) on the second baffle (204) through the teeth (202).

4. The coal discard belt capable of segmentally and gradually controlling the flow rate according to claim 3, characterized in that: A driven gear (205) is fixedly connected to the top of the first baffle (201), a transmission gear (206) is meshed with the side of the driven gear (205), a second belt pulley (207) is fixedly connected to the top of the transmission gear (206), a third belt pulley (208) is fixedly connected to the top of the driven gear (205), and a second belt (209) is slidably connected to the third belt pulley (208).

5. The coal rejection belt capable of segmentally and gradually controlling the flow rate according to claim 4, wherein: The outer shapes of both the first baffle (201) and the second baffle (204) are in the shape of "L", the outer shape of the spring piece (203) is in the shape of "V", one end of the spring piece (203) away from the first baffle (201) is fixedly connected to the side of the second baffle (204) away from the teeth (202), and the size of the transmission gear (206) is the same as the size of the driven gear (205).

6. The coal reject belt capable of segmentally and progressively controlling the flow rate according to claim 4, wherein: One end of the first belt (108) away from the first belt pulley (105) is slidably connected to the second belt pulley (207), the size of the transmission gear (206) is larger than the size of the driving gear (104), and the size of the second belt pulley (207) is larger than the size of the first belt pulley (105).

7. The coal rejection belt capable of segmentally and gradually controlling the flow rate according to claim 4, characterized in that: The main body mechanism (3) includes a protective housing (301). Inside the protective housing (301), a horizontal belt conveyor (302) and a climbing belt conveyor (306) are respectively arranged. On both sides of the protective housing (301), sliding housings (303) are fixedly connected. Inside the sliding housing (303), a chute (304) is formed. On the top of the protective housing (301), a protective cover (305) is fixedly connected. On the protective housing (301), a support plate (307) is fixedly connected.

8. The coal discard belt capable of segmentally and gradually controlling the flow rate according to claim 7, wherein: The climbing belt conveyor (306) is located below the end of the horizontal belt conveyor (302) far from the sliding housing (303), and the protective cover (305) is located above the end of the horizontal belt conveyor (302) far from the sliding housing (303).

9. The coal rejection belt capable of segmentally and gradually controlling the flow rate according to claim 7, characterized in that: The rotating plate (101) is located above the horizontal belt conveyor (302). The rotating plate (101) is rotatably connected to the inner wall of the protective housing (301). The roller (102) is located on the side of the rotating plate (101) far from the protective cover (305). On the side of the rotating plate (101) close to the protective cover (305), it is elastically connected to the inner wall of the protective housing (301) through a support spring (103). The sliding rod (109) is slidably connected to the inner wall of the protective housing (301). The bottom of the rack (106) is slidably connected to the chute (304). The push block (107) penetrates the inner wall of the protective housing (301) and extends above the horizontal belt conveyor (302).

10. The coal rejection belt capable of segmentally and gradually controlling the flow rate according to claim 7, wherein: The first baffle (201) is located between the horizontal belt conveyor (302) and the support plate (307). The driven gear (205) is located above the support plate (307). The transmission gear (206) is rotatably connected to the top of the protective housing (301). The first belt (108) is located above the protective housing (301). The first baffle (201) is located on the side of the rotating plate (101) close to the protective cover (305). The spring piece (203) is located on the side of the first baffle (201) far from the protective cover (305).

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