Scraper structure of coal mine scraper conveyor
Patent Information
- Application Number
- CN202522560723.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-12-02
AI Technical Summary
[0003]煤炭刮板输送机的核心部件之一就是刮板，作为安装在链条上的板体，随着循环运行持续地推进煤炭原料移动，如FU270型刮板输送机就是典型的无极闭合循环运行模式，由于刮板是直接接触到煤矿的，但煤矿并非颗粒大小一致，刚开采出来的煤矿石甚至大小不一，直径从1cm-30cm不等，《露天煤矿爆破大块成因及影响研究》一文中也揭示了煤矿石大小不一致的原因，煤矿石在使用刮板输送机输送时，因尺寸过大或形状不规则，大块煤矿石会出现偏离刮板直接带动路径的现象，如大块煤矿石会卡在刮板与中部槽的间隙处，或者由于自身重力作用下沉到中部槽底部，与刮板的接触状态不佳，导致刮板对其的带动效果减弱，在这种情况下，大块煤矿石会在自身重力和周围物料的推动作用下，以一种相对不规则的方式移动，影响了煤炭刮板输送机的煤矿石输送效率[1][继汪2]
[0012]与现有技术相比，本实用新型提供了一种煤矿刮板输送机的刮板结构，具备以下有益效果[3][继汪4]：
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Figure CN224767623U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of coal mine scraper conveyors, specifically to a scraper structure for a coal mine scraper conveyor. Background Technology
[0002] A scraper conveyor uses an open chute as the receiving element for coal, ore, or powdery materials, and fixes scraper devices to a chain to form a scraper chain. This scraper chain serves as the traction component for material conveying. When the head drive unit is started, it drives the sprocket on the head shaft to rotate, causing the scraper chain to circulate and move the material along the chute until it is unloaded at the head of the conveyor. Because the scraper chain can bypass the sprocket to make a stepless closed loop, it can complete the continuous conveying of materials.
[0003] One of the core components of a coal scraper conveyor is the scraper. As a plate mounted on a chain, it continuously propels the coal raw material during cyclic operation. For example, the FU270 scraper conveyor is a typical example of a continuously looping closed-loop operation. Since the scraper directly contacts the coal, but coal particles are not uniform in size, freshly mined coal can vary greatly in size, ranging from 1cm to 30cm in diameter. The article "Research on the Formation and Influence of Large Coal Bricks in Open-Pit Coal Mine Blasting" also reveals the reasons for the inconsistent size of coal ore. When using the scraper... When conveying coal by a plate conveyor, large pieces of coal may deviate from the path directly driven by the scraper due to their large size or irregular shape. For example, large pieces of coal may get stuck in the gap between the scraper and the middle trough, or sink to the bottom of the middle trough due to their own weight, resulting in poor contact with the scraper and weakening the driving effect of the scraper. In this case, large pieces of coal will move in a relatively irregular manner under the pushing action of their own weight and surrounding materials, affecting the coal conveying efficiency of the coal scraper conveyor [1][Ji Wang 2]. Utility Model Content
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a scraper structure for a coal mine scraper conveyor, which has the advantages of improving the scraper structure of the scraper conveyor to make it more efficient in conveying large pieces of coal mixed in with the coal ore, thus solving the above-mentioned technical problems.
[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a scraper structure for a coal mine scraper conveyor, comprising a scraper and a chain fixedly connected to the scraper. The chain is composed of multiple chain blocks connected in sequence. The beginning and end ends of the chain are fitted with sprockets, and the gaps at the chain block connections engage with the protrusions on the surface of the sprockets. The two sides of the sprockets pass through the inner wall of the chute and are connected to a drive motor. The bottom of the scraper contacts the inner bottom surface of the chute. There are multiple scrapers, and the top of each chain block is fixedly connected to the left and right sides. The front wall of the scraper is connected to a screening structure for separating and conveying large pieces of coal ore. The screening structure includes: a forward tilting rod, wherein there are multiple forward tilting rods and the tail end is fixedly connected to the front wall of the scraper, and the tail end of the forward tilting rod has an inclination angle of 15-35 degrees with the front wall of the scraper; It also includes a spacing channel, which is a spacing between multiple forward tilting rods, and the width of the spacing channel is between 5-15cm.
[0006] As a preferred technical solution of this utility model, the screening structure further includes a front plate, which is inverted "U" shaped and has a connecting block welded to the side wall of the chain block on its top rear wall. The rear end of the connecting block is welded to the top front wall of the scraper. The front plate forms a gap with the scraper through the connecting block, and the gap is a buffer zone.
[0007] As a preferred embodiment of this utility model, the forward tilting rod is a rectangular rod, and the side cross-section of the forward tilting rod is a right-angled triangle.
[0008] As a preferred technical solution of this utility model, the top of the front tilting rod is fixedly connected to the front wall of the front plate, and the included angle between the two is 15 degrees. The front tilting rod is indirectly fixedly connected to the front wall of the scraper through the front plate, and the spacing channel width between the multiple front tilting rods is 5cm.
[0009] As a preferred embodiment of this utility model, the forward tilting rod is a circular rod, the tail end of the forward tilting rod is in direct contact with the front wall of the scraper, and the included angle between the two is 35 degrees, and the width of the gap between the forward tilting rods is 15cm.
[0010] As a preferred embodiment of this utility model, the screening structure further includes an extension rod located behind the scraper, with the extension rod extending in the same direction as the front tilting rod. The front end of the extension rod passes through the scraper and is fixedly connected to the front tilting rod. The tail end of the extension rod is also connected to a stop block, the diameter of which is larger than the diameter of the extension rod.
[0011] As a preferred embodiment of this invention, the stop block is fixedly connected to the end of the extension rod by welding.
[0012] Compared with the prior art, the present invention provides a scraper structure for a coal mine scraper conveyor, which has the following beneficial effects [3][4]: This invention utilizes a chain that moves along the direction of the sprocket's rotation. As the chain moves along the chute, its direction of movement is from back to front. When the front wall of the scraper moves the front plate, the front plate then moves multiple forward tilting rods. At this time, the forward tilting rods move in a straight line from right to back to front at the bottom of the chute. When the forward tilting rods move forward under the action of traction force, the traction force is applied along the inclined plane, decomposing a portion of the force into a component that moves large pieces of coal ore upward along the inclined plane and a component that presses vertically onto the large pieces of coal ore, small pieces of coal ore, and coal ore debris. Through the inclined plane, a smaller force causes the large pieces of coal ore to have an upward displacement tendency. Subsequently, the large pieces of coal ore remain on the front wall of the forward tilting rods, while the small pieces... After being pushed aside by the front inclined rod, the coal ore and coal ore fragments enter the interval channel. At this time, small pieces of coal ore and coal ore fragments come into contact with the front wall of the scraper. The front wall of the scraper and the interval channel form a "U" shape, which catches the small pieces of coal ore and coal ore fragments. Then the scraper continues to move forward until it reaches the opening at the front end of the chute. The inclined front wall of the front inclined rod 5 provides an upward sliding slope for the ore. Large pieces of coal ore are continuously guided upward by this slope and eventually stop at the top of the inclined rod or directly contact the upper area of the scraper. This completely avoids sinking and jamming, and achieves the effect of improving the scraper conveyor to make it more efficient in conveying large pieces of coal ore mixed in with the coal ore. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the chain structure in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the scraper structure in Embodiment 1 of this utility model; Figure 4 This is a front sectional view of the overall structure of Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the chain structure in Embodiment 2 of this utility model; Figure 6 This is a schematic diagram of the scraper structure in Embodiment 2 of this utility model.
[0014] Among them: 1. scraper; 101. front plate; 102. connecting block; 103. buffer zone; 2. chain; 3. sprocket; 4. chute; 5. forward tilting rod; 6. interval channel; 7. extension rod; 701. stop block. Detailed Implementation
[0015] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0016] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0018] Please see Figure 1-6 A scraper structure for a coal mine scraper conveyor includes a scraper 1 and a chain 2 fixedly connected to the scraper 1. The chain 2 is composed of multiple chain blocks connected in sequence. The beginning and end ends of the chain 2 are sleeved with sprockets 3, and the gaps at the chain block connections of the chain 2 engage with the protrusions on the surface of the sprocket 3. The two sides of the sprocket 3 pass through the inner wall of the chute 4 and are connected to a drive motor. The bottom of the scraper 1 contacts the inner bottom surface of the chute 4. The scraper 1 is characterized by having multiple scrapers, and the top of each chain block of the chain 2 is fixedly connected to the left and right sides. The front wall of the scraper 1 is connected to a screening structure for separating and conveying large pieces of coal ore. The screening structure includes: a front tilting rod 5, there are multiple front tilting rods 5, and the tail end is fixedly connected to the front wall of the scraper 1. The tail end of the front tilting rod 5 and the front wall of the scraper 1 have an inclination angle of 15-35 degrees. It also includes a spacing channel 6, which is the interval between multiple forward tilting rods 5, and the width of the spacing channel 6 is between 5 and 15 cm.
[0019] In this application, the scraper conveyor is an FU270 type scraper conveyor. The corresponding sprocket 3 and the drive motor connected to it are existing equipment of the FU270 type scraper conveyor body. This application does not improve the drive part. The improvement of this application is limited to the scraper part of the FU270 type scraper conveyor. Therefore, the connection method between its drive motor and sprocket 3 and the drive control principle are common existing technologies that are already circulating in the market, and this application will not elaborate further.
[0020] Furthermore, the screening structure also includes a front plate 101, which is an inverted "U" shape, and a connecting block 102 that fits the side wall of the chain 2 is welded to the top rear wall. The rear end of the connecting block 102 is welded to the top front wall of the scraper 1. The front plate 101 forms a gap with the scraper 1 through the connecting block 102, and the gap is a buffer zone 103.
[0021] Furthermore, the forward tilting rod 5 is a rectangular rod, and the side cross-section of the forward tilting rod 5 is a right-angled triangle.
[0022] The front tilting rod 5, positioned in a right-angled triangle, has a straight rear wall and an oblique front wall. When the front wall of the scraper 1 moves the front plate 101, and the front plate 101 then moves multiple front tilting rods 5, the front tilting rods 5 move in a straight line from right rear to front inside the chute 4, contacting the coal ore inside the chute 4. According to the principle of inclined planes, when lifting or moving objects, an inclined plane can save effort. When the front tilting rod 5 moves forward under the action of traction force, the traction force is along the direction of the inclined plane. The applied force is decomposed into a component that causes large pieces of coal ore to move upwards along the inclined plane and a component that presses vertically onto the large pieces of coal ore, small pieces of coal ore, and coal ore debris. The inclined plane uses a smaller force to induce an upward displacement tendency in the large pieces of coal ore. The large pieces of coal ore remain on the front wall of the front inclined rod 5, while the small pieces of coal ore and coal ore debris are directly pushed aside by the front inclined rod 5 and enter the spacer channel 6. At this point, the small pieces of coal ore and coal ore debris contact the front wall of the scraper 1, as shown in the attached instruction manual. Figure 2 As shown, a "U" shape is formed between the front wall of scraper 1 and the spacer channel 6, which catches small pieces of coal ore and coal ore debris before scraper 1 continues to move forward.
[0023] Furthermore, the top of the front tilt rod 5 is fixedly connected to the front wall of the front plate 101, with an included angle of 15 degrees between them. The front tilt rod 5 is indirectly fixedly connected to the front wall of the scraper 1 through the front plate 101, and the width of the spacing channel 6 between the multiple front tilt rods 5 is 5 cm.
[0024] The rectangular forward tilting rod 5 and the front wall of the front plate 101 form an angle of 15 degrees. Based on the law of interior angles of a triangle and referring to the appendix of the instruction manual... Figure 2The top angle of the front tilt rod 5 is 15 degrees, and the bottom angle of the front tilt rod 5 near the front plate 101 is a right angle. Then the bottom angle of the front front end of the front tilt rod 5 away from the front plate 101 is 75 degrees. The hypotenuse of this angle forms a sufficient tilt length for the front tilt rod 5, so that large pieces of coal ore can continuously contact the front tilt rod 5 when being pushed.
[0025] The connecting block 102 is bolted through and then fixedly connected to the chain block of the chain 2, thereby fixing the front plate 101 to the chain 2.
[0026] The chain 2 is fixedly connected to the front plate 101 by the connecting block 102, as shown in the instruction manual. Figure 2 As shown, the connecting block 102 is also connected to the scraper 1 at its tail end. Therefore, the scraper 1, the connecting block 102 and the front plate 101 are integrated and move synchronously from back to front inside the chute 4 when driven by the chain block.
[0027] Furthermore, the front tilting rod 5 is a circular rod, and the tail end of the front tilting rod 5 is in direct contact with the front wall of the scraper 1, with an included angle of 35 degrees between them. The width of the gap channel 6 between the front tilting rods 5 is 15cm.
[0028] The circular, forward-tilting rod 5 acts as a simple lever. When the scraper 1 moves continuously from back to front inside the chute 4, it generates a prying force at the contact point between the forward-tilting rod 5 and the large piece of coal. This prying force causes the stone to rotate or move around the underside of the forward-tilting rod 5. Simultaneously, the component of the force applied to the large piece of coal by the forward-tilting rod 5 during its movement, parallel to the chute 4, directly propels the large piece of coal forward or to the side. (See attached instruction manual.) Figure 5 As shown, there is a 15cm gap channel 6 between the two forward tilting rods 5. Therefore, only large pieces of coal ore larger than 15cm will be blocked by the two circular forward tilting rods 5. Then, the two circular forward tilting rods 5 work together on the surface of the large pieces of coal ore. The component force parallel to the chute 4 applied to the large pieces of coal ore during the movement of the forward tilting rods 5 will directly push the large pieces of coal ore with a diameter greater than 15cm forward. Then, since the inner side of the chute 4 is full of coal ore, and combined with the angle of the forward tilting rods 5 relative to the scraper 1, the large pieces of coal ore with a diameter greater than 15cm will move upward towards the scraper 1 and contact the upper end of the front wall of the scraper 1 while moving forward. Then, as the scraper 1 continues to advance inside the chute 4, the accumulated coal ore will continuously push the large pieces of coal ore with a diameter greater than 15cm upward until they contact the extension rod 7.
[0029] Furthermore, the screening structure also includes an extension rod 7, which is located behind the scraper 1 and extends in the same direction as the front tilting rod 5. The front end of the extension rod 7 passes through the scraper 1 and is fixedly connected to the front tilting rod 5. The tail end of the extension rod 7 is also connected to a stop block 701, the diameter of which is larger than that of the extension rod 7.
[0030] An extension rod 7 is installed behind the scraper 1, and its length is greater than the height of the scraper 1, but as per the instruction manual. Figure 5 As shown, the extension height of the extension rod 7 cannot exceed half the height of the sprocket 3; otherwise, when the scraper 1 is driven by the chain 2 to pass the sprocket 3, the extension rod 7 connected to the scraper 1, which has already flipped to the inside of the chute 4, will collide with each other.
[0031] The stop block 701 is fixedly connected to the end of the extension rod 7 by welding.
[0032] Example 1 In this embodiment, the scraper conveyor is an FU270 type scraper conveyor. The sprocket 3 and its connected drive motor are existing equipment of the FU270 type scraper conveyor body. This application does not improve the drive part. The improvement of this application is limited to the scraper part of the FU270 type scraper conveyor. Therefore, the connection method and drive control principle of its drive motor and sprocket 3 are common existing technologies already circulating in the market, and this application will not elaborate further. The tail end of the chute 4 in this embodiment is directly connected to the coal pile or coal conveyor belt. Then, the drive motor is started so that it increases the torque under the action of the reducer and drives the sprocket 3 to start rotating. When the sprocket 3 starts to rotate, it drives the chain 2 to move relative to it. Finally, the chain 2 starts to move in the direction of rotation of the sprocket 3. As the chain 2 moves in the chute 4, the direction of movement of the chain 2 is from back to front, and it tilts forward in a right-angled triangle posture. The rear wall of the inclined rod 5 is straight, and the front wall is inclined. When the front wall of the scraper 1 moves the front plate 101, the front plate 101 then moves multiple forward inclined rods 5. At this time, the forward inclined rods 5 move in a straight line from back to front at the bottom of the inner side of the chute 4, contacting the coal ore inside the chute 4. According to the principle of inclined planes, when lifting or moving objects, inclined planes can save effort. When the forward inclined rod 5 moves forward under the action of traction force, the traction force is applied along the direction of the inclined plane, lifting a portion of the... The force is decomposed into a component force that moves the large pieces of coal ore upwards along the inclined plane and a component force that presses vertically onto the large pieces of coal ore, small pieces of coal ore, and coal ore debris. The inclined plane uses a smaller force to induce an upward displacement tendency in the large pieces of coal ore. The large pieces of coal ore remain on the front wall of the front inclined rod 5, while the small pieces of coal ore and coal ore debris are directly pushed aside by the front inclined rod 5 and enter the spacer channel 6. At this point, the small pieces of coal ore and coal ore debris contact the front wall of the scraper 1, as shown in the attached instruction manual. Figure 2 As shown, the front wall of scraper 1 and the spacer channel 6 form a "U" shape, catching small pieces of coal ore and coal ore debris. Then scraper 1 continues to move forward until it reaches the opening at the front end of chute 4. At this point, as shown in the attached instruction manual... Figure 2As shown, the gap at the connection of the chain block of the chain 2 at the top of the scraper 1 comes into contact with the protruding part of the sprocket 3. Then the scraper 1 begins to move in a circular motion around the sprocket 3. The coal ore and large pieces of coal ore on the front wall of the scraper 1 are swept towards the opening of the chute 4, thus completing the sorting and conveying of the large pieces of coal ore mixed in with the coal ore.
[0033] In operation, the drive motor is started, and its torque is increased by the reducer, causing the sprocket 3 to rotate. As the sprocket 3 rotates, it drives the chain 2 to move relative to it. Finally, the chain 2 moves in the direction of the sprocket 3's rotation. As the chain 2 moves in the chute 4, its direction of movement is from back to front. When the front wall of the scraper 1 moves the front plate 101, the front plate 101 then moves multiple front tilting rods 5. At this time, the front tilting rods 5 move straight forward from the right rear at the bottom of the inner side of the chute 4. When the front tilting rods 5 move forward under the action of traction force, the traction force is applied along the inclined plane, decomposing a portion of the force into a component that causes large pieces of coal to move upward along the inclined plane and a component that presses vertically against the large pieces of coal, small pieces of coal, and coal fragments. Through the inclined plane, a smaller force causes the large pieces of coal to have an upward displacement tendency. The large pieces of coal remain on the front wall of the front tilting rods 5, while the small pieces of coal and coal fragments... After the debris is pushed away by the front tilting rod 5, it enters the interval channel 6. At this time, small pieces of coal ore and coal ore debris come into contact with the front wall of the scraper 1. The front wall of the scraper 1 and the interval channel 6 form a "U" shape, which catches the small pieces of coal ore and coal ore debris. Then the scraper 1 continues to move forward until it reaches the opening at the front end of the chute 4. In this embodiment, the tilted front wall of the front tilting rod 5 provides a very efficient upward sliding slope for the ore. Large pieces of coal ore are continuously guided upward by this slope and eventually stop at the top of the tilting rod or directly contact the upper area of the scraper, thus completely avoiding sinking and jamming. The gap at the chain block connection of the chain 2 at the top of the scraper 1 comes into contact with the protruding part of the sprocket 3. Then the scraper 1 begins to move in a circle around the sprocket 3. The coal ore and large pieces of coal ore on the front wall of the scraper 1 are swept towards the opening of the chute 4, completing the sorting and conveying of large pieces of coal ore mixed in with the coal ore.
[0034] Example 2 This embodiment still uses the FU270 scraper conveyor, and similarly, the drive section is not improved. The improvements in this application are limited to the scraper section of the FU270 scraper conveyor. Furthermore, the tail end of the chute 4 in this embodiment is directly connected to the coal pile or the coal conveyor belt. The drive motor is started, and after the torque is increased under the action of the reducer, it drives the sprocket 3 to start rotating. When the sprocket 3 starts to rotate, it drives the chain 2 to move relative to it. Finally, the chain 2 starts to move in the direction of rotation of the sprocket 3. 2. The chain 2 moves from back to front as it moves along the chute 4. The circular, forward-tilting rod 5 acts as a simple lever. When the scraper 1 moves continuously from back to front inside the chute 4, it generates a prying force at the contact point between the forward-tilting rod 5 and the large piece of coal. This prying force causes the stone to rotate or move around the underside of the forward-tilting rod 5. Simultaneously, the component force parallel to the chute 4 applied to the large piece of coal during the movement of the forward-tilting rod 5 directly pushes the large piece of coal forward or to the side. (See attached instruction manual.) Figure 5 As shown, there is a 15cm gap channel 6 between the two forward tilting rods 5. Therefore, only large pieces of coal ore larger than 15cm will be blocked by the two circular forward tilting rods 5, while coal ore smaller than 15cm will be gathered by the gap channel 6 and then pushed by the scraper 1 in front of the scraper 1, moving towards the opening at the front end of the chute 4. Through the combined action of the two circular forward tilting rods 5 on the surface of the large pieces of coal ore, the component force parallel to the chute 4 applied by the forward tilting rods 5 during their movement will directly push the large pieces of coal ore with a diameter greater than 15cm forward. Then, due to the chute... The inner side of chute 4 is filled with coal ore. Combined with the angle of the front tilting rod 5 relative to the scraper 1, large pieces of coal ore with a diameter greater than 15cm will move forward and upward towards the scraper 1, contacting the upper end of the front wall of the scraper 1. Then, as the scraper 1 continues to advance inside the chute 4, the accumulated coal ore will continuously push the large pieces of coal ore with a diameter greater than 15cm upward until they contact the extension rod 7. The extension rod 7 is located behind the scraper 1, and its length is greater than the height of the scraper 1. When a large piece of coal ore with a diameter greater than 15cm contacts the extension rod 7, as per the instruction manual... Figure 5 As shown, extension rod 7 is also a circular rod, and its tilt angle is the same as that of the front tilt rod 5. Therefore, large pieces of coal ore with a diameter greater than 15cm will continue to move along the front tilt rod 5 until they contact the stop block 701. The diameter of the stop block is larger than that of extension rod 7, thus blocking the large pieces of coal ore with a diameter greater than 15cm at this point. Since extension rod 7 exceeds the height of scraper 1, the excess small pieces of coal ore will leak out between the two extension rods 7 and be pushed by the next scraper 1. At this time, as shown in the attached instruction manual... Figure 5As shown, the gap at the connection of the chain block of the chain 2 at the top of the scraper 1 comes into contact with the protruding part of the sprocket 3. Then the scraper 1 begins to move in a circular motion around the sprocket 3. The coal ore and large pieces of coal ore on the front wall of the scraper 1 are swept towards the opening of the chute 4, thus completing the sorting and conveying of the large pieces of coal ore mixed in with the coal ore.
[0035] In this embodiment, the lever action of the circular forward tilting rod 5 makes it easier to rotate and lift irregular large pieces of coal ore. Combined with the 15 cm wide interval, only truly large pieces of coal ore will be intercepted and enter the processing flow. Subsequently, the addition of the extension rod 7 and the stop block 701 provides a continuous, higher guiding and restraining track for the lifted large pieces of coal ore, ensuring that the large pieces of coal ore are maintained at a higher position away from the bottom plate for conveying until the discharge port.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A scraper structure for a coal mine scraper conveyor, comprising a scraper (1) and a chain (2) fixedly connected to the scraper (1), wherein the chain (2) is composed of multiple chain blocks connected in sequence, the beginning and end ends of the chain (2) are fitted with sprockets (3), and the gaps at the chain block connections of the chain (2) engage with the protrusions on the surface of the sprockets (3), the two sides of the sprockets (3) pass through the inner wall of the chute (4) and are connected to a drive motor, and the bottom of the scraper (1) contacts the inner bottom surface of the chute (4), characterized in that: The scraper (1) is multiple, and each chain block of the chain (2) is fixedly connected to the left and right sides at the top. The front wall of the scraper (1) is connected to a screening structure for separating large pieces of coal ore and conveying large pieces of coal ore. The screening structure includes: a front tilting rod (5), there are multiple front tilting rods (5), and the tail end is fixedly connected to the front wall of the scraper (1). The tail end of the front tilting rod (5) and the front wall of the scraper (1) have an inclination angle of 15-35 degrees. It also includes a spacing channel (6), which is a spacing between multiple forward tilting rods (5), and the width of the spacing channel (6) is between 5 and 15 cm.
2. A flight structure for a coal mine scraper conveyor as claimed in claim 1 wherein: The screening structure also includes a front plate (101), which is an inverted "U" shape and has a connecting block (102) welded to the side wall of the chain block of the chain (2) on its top rear wall. The rear end of the connecting block (102) is welded to the top front wall of the scraper (1). The front plate (101) forms a gap with the scraper (1) through the connecting block (102), and the gap is a buffer zone (103).
3. A flight structure for a coal mine scraper conveyor as claimed in claim 2 wherein: The forward tilting rod (5) is a rectangular rod, and the side cross section of the forward tilting rod (5) is a right triangle.
4. A flight structure for a coal mine scraper conveyor as claimed in claim 3 wherein: The top of the front tilting rod (5) is fixedly connected to the front wall of the front plate (101), and the included angle between the two is 15 degrees. The front tilting rod (5) is indirectly fixedly connected to the front wall of the scraper (1) through the front plate (101). The width of the spacing channel (6) between the multiple front tilting rods (5) is 5 cm.
5. The flight structure of a coal mine scraper conveyor according to claim 1, characterized in that: The front tilting rod (5) is a circular rod. The tail end of the front tilting rod (5) is in direct contact with the front wall of the scraper (1), and the included angle between the two is 35 degrees. The width of the gap channel (6) between the front tilting rods (5) is 15cm.
6. A flight structure for a coal mine scraper conveyor as claimed in claim 5 wherein: The screening structure also includes an extension rod (7), which is located behind the scraper (1) and the extension direction of the extension rod (7) is consistent with the angle of the front tilting rod (5). The front end of the extension rod (7) passes through the scraper (1) and is fixedly connected to the front tilting rod (5). The tail end of the extension rod (7) is also connected to a stop block (701), and the diameter of the stop block (701) is larger than the diameter of the extension rod (7).
7. The scraper structure of a coal mine scraper conveyor according to claim 6, characterized in that: The stop block (701) is fixedly connected to the end of the extension rod (7) by welding.