A bridge-type transfer conveyor for coal mine mining

Abstract

The present invention discloses a bridge-type transfer conveyor for coal mining, which relates to the technical field of conveying. The technical problem to be solved is that in the limited space of thin coal seams, the ability to pre-treat coal blocks before conveying is relatively weak. It includes a main body of the bridge-type transfer conveyor. A coal feeding mechanism is arranged at the lower end of the main body of the bridge-type transfer conveyor, and a coal discharging port is arranged at the upper end of the main body of the bridge-type transfer conveyor. The coal feeding mechanism includes two fixed side plates, and the two fixed side plates are symmetric structures. The two fixed side plates are connected by a screening plate and a feeding plate. The screening plate is arranged above the feeding plate. An impurity leading-out plate is connected to the side wall of the screening plate. A feeding hopper is arranged at the top of the fixed side plate. A coal block crushing assembly is arranged between the screening plate and the feeding plate, and an impurity removing assembly is arranged on the side wall of the coal block crushing assembly. The present invention has the advantages of being able to perform pre-crushing and impurity removal operations on coal, and improving the ability to pre-treat coal.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying, and more specifically, to a bridge-type transfer conveyor for coal mine mining. Background Art

[0002] The bridge-type transfer conveyor for thin coal seam mining is a device specifically used for transporting coal in the environment of thin coal seams with a thickness of less than 1.3 meters. Coal and other materials are moved from the tail to the head direction in the middle trough, so as to realize the continuous conveying of coal.

[0003] When mining thin coal seams, the shearer cuts the coal body on the coal wall to make it into loose coal blocks, and then loads them into the front end of the bridge-type transfer conveyor and transports them out from the front end to the rear end. Since the space of the thin coal seam is limited, the space of the coal mining roadway is also limited, and the mechanical equipment accommodated in the coal mining roadway is also limited, which limits the body size of the bridge-type transfer conveyor not to be too large. When preprocessing the coal blocks before conveying, usually near the feed inlet of the bridge-type transfer conveyor, workers are arranged to manually pick out impurities such as large pieces of gangue and branches in the coal flow. The workers visually inspect and pick out obvious impurities from the coal flow to prevent them from entering the bridge-type transfer conveyor and causing blockage or affecting the conveying effect. However, the manual picking method is prone to omissions, and it is difficult to perform crushing operations on large pieces of coal, resulting in weak ability to preprocess the coal blocks before conveying. In view of this, we propose a bridge-type transfer conveyor for coal mine mining. Summary of the Invention

[0004] The purpose of the present invention is to provide a bridge-type transfer conveyor for coal mine mining to solve the technical problem of weak ability to preprocess coal blocks before conveying in the limited space of thin coal seams.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A bridge-type transfer conveyor for coal mining, including a main body of the bridge-type transfer conveyor. A coal feeding mechanism is arranged at the low end of the main body of the bridge-type transfer conveyor, and a coal discharge port is arranged at the high end of the main body of the bridge-type transfer conveyor. The coal feeding mechanism includes two fixed side plates, and the two fixed side plates are symmetrical structures. The two fixed side plates are connected by a screening plate and a feeding plate. The screening plate is arranged above the feeding plate. An impurity extraction plate is connected to the side wall of the screening plate. A feeding hopper is arranged at the top of the fixed side plate. The screening plate is used to screen coal, so that large coal blocks and impurities are retained on the top of the screening plate, and crushed coal enters the top of the feeding plate, and then is conveyed by the main body of the bridge-type transfer conveyor. A coal block crushing component is arranged between the screening plate and the feeding plate, and a impurity removing component is arranged on the side wall of the coal block crushing component; The coal block crushing component has a reciprocating translational motion state. During the reciprocating translational motion process of the coal block crushing component, it can crush the coal on the top of the screening plate, so that the massive coal is crushed into multiple pieces of crushed coal. At the same time, during the reciprocating translational motion process of the coal block crushing component, it can drive the impurity removing component to repeatedly move the impurities on the top of the screening plate to the top of the impurity extraction plate for impurity removal operation.

[0006] Preferably, the top of the screening plate is composed of multiple strip plates, and a screening channel is formed between every two strip plates. The top of the strip plate is set as an arc convex surface structure; A guiding inclined block is connected to the top of the screening plate, and the side wall of the guiding inclined block is set as an inclined surface. The guiding inclined block is used to block the coal on the top of the screening plate; The impurity extraction plate is in the shape of an arc curved plate and is used to guide the impurities out.

[0007] Preferably, a lower moving groove and an upper moving groove are opened on the side wall of the fixed side plate; A support frame and a support plate are connected to the side wall of the fixed side plate. A wheel rail is arranged on the top surface of the support plate, and a multi-stage oil cylinder is arranged on the top surface of the support frame; A plurality of tooth openings are arranged at the top of the lower moving groove, and the bottom of the lower moving groove is set as an inclined surface structure; The upper moving groove is an inclined long strip groove, and the support plate is arranged at the notch of the upper moving groove.

[0008] Preferably, the coal block crushing component includes a cylinder body, and a pushing frame is connected to the side wall of the cylinder body through a plurality of inclined rods. A plurality of pulleys are arranged inside the pushing frame; Among them, the inclined rods are movably arranged in the upper moving groove; The pushing frame is slidably matched with the wheel rail through a plurality of the pulleys; The output end of the multi-stage oil cylinder is connected to the side wall of the pushing frame.

[0009] Preferably, a rotating column is movably arranged in the inner cavity of the cylinder body. One end of the rotating column penetrates through the side wall of the cylinder body and is movably arranged in the lower movable groove. A gear is connected to one end of the rotating column, and the gear is meshed and connected with the tooth opening;

[0010] A plurality of first rotating plates and a plurality of second rotating plates are connected to the circumferential outer wall of the rotating column; one side wall of the first rotating plate is an annular concave-convex arc surface structure, the second rotating plate has the same structure as one side wall of the first rotating plate, and the concave-convex arc surface structures of the second rotating plate and one side wall of the first rotating plate are distributed alternately; the plurality of first rotating plates and the plurality of second rotating plates are arranged alternately.

[0011] Preferably, a wheel groove is formed in one side wall of the first rotating plate. A first crushing rod is arranged above the first rotating plate. The first crushing rod penetrates through the top of the cylinder body and is movably matched with the top of the cylinder body. A wheel frame is connected to the bottom of the first crushing rod. A rolling wheel is arranged in the wheel frame, and the rolling wheel is movably arranged in the wheel groove. A spring is sleeved on the circumferential outer wall of the first crushing rod, and the spring is arranged above the wheel frame; a second crushing rod is arranged above the second rotating plate, and the second crushing rod has the same structural components as the first crushing rod.

[0012] Preferably, the top of the first crushing rod is provided with a conical structure. A plurality of tooth-shaped plates are connected to the circumferential outer wall of the first crushing rod. The second crushing rod has the same structure as the first crushing rod. The conical structure is used for piercing and crushing coal, and the tooth-shaped plates are used for cutting and crushing coal.

[0013] Preferably, a plurality of support columns are connected to the outer side wall of the cylinder body through fixing plates. One end of the support column is connected with a guide plate. The bottom of the support column is rotatably connected with an arc-shaped rod, and the bottom of the arc-shaped rod is connected with a feeding scraper; wherein, the guide plate is an arc-shaped curved plate structure, and the guide plate is used for guiding the coal falling from the screening plate into the front of the feeding scraper when the coal block crushing component reciprocates.

[0014] Preferably, the impurity removal component includes a plurality of sliding protrusions connected to the outer side wall of the cylinder body. An impurity removal rod is arranged on the side wall of the sliding protrusion. A T-shaped groove is formed in the side wall of the impurity removal rod, and the impurity removal rod is slidably matched with the sliding protrusion through the T-shaped groove; there are a plurality of impurity removal rods, and every two impurity removal rods are connected through a guide rod.

[0015] Preferably, the impurity removal component further includes a guide plate connected to the inner side wall of the fixed side plate. A guide groove is formed in the side wall of the guide plate, and one end of the guide rod is movably arranged in the guide groove; wherein, a pending groove is arranged in the guide groove, and a limiting plate is movably arranged on the inner side wall of the guide groove, and the limiting plate is arranged in the pending groove.

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

[0017] 1. By designing a coal feeding mechanism, the coal mined from the coal seam is transported into the main body of the bridge-type transfer conveyor through the coal feeding mechanism for conveying. The coal is crushed by the coal block crushing component in the coal feeding mechanism, so that the coal entering the main body of the bridge-type transfer conveyor is in a loose crushed state. The obvious large impurities in the coal, such as branches and stones, are removed by the impurity removal component, which can effectively prevent the problems of blockage inside the main body of the bridge-type transfer conveyor caused by large coal blocks and impurities. The present invention can effectively perform pre-crushing and impurity removal operations on the coal. The crushed coal can be more easily conveyed by the main body of the bridge-type transfer conveyor, improving the stability and working efficiency of the main body of the bridge-type transfer conveyor for coal conveying and enhancing the ability to pre-treat the coal.

[0018] 2. The present invention also designs the concave-convex arc surface structures on the side walls of the first rotating plate and the second rotating plate to be alternately distributed, so that the multiple first crushing rods and the multiple second crushing rods can alternately move up and down reciprocally to crush the large coal blocks staying above the screening channel alternately, improving the crushing effect. By making the cylinder perform a reciprocating translation motion below the screening plate, when the first crushing rod and the second crushing rod perform an alternating crushing operation in the screening channel, they can perform a reciprocating translation, realizing a comprehensive crushing operation on the coal above the screening channel, reducing the crushing blind area and making the crushing effect more comprehensive.

[0019] 3. The present invention also sets the tops of the first crushing rod and the second crushing rod to be conical structures, making it easier for the first crushing rod and the second crushing rod to insert into the coal to realize the crushing operation of the coal. By connecting a toothed plate to the circumferential outer wall of the first crushing rod and using the serrated structure on the side wall of the toothed plate, when the first crushing rod and the second crushing rod lift and lower, a cutting and crushing effect can be formed on the coal above the screening channel and the coal stuck inside the screening channel, further improving the crushing effect on the coal.

[0020] 4. In the present invention, when the cylinder moves forward, it can drive the guide rod to slide forward along the low-end groove section of the diversion groove, so that the impurity removal rod always remains in the same position on the sliding rib until the guide rod is ejected from one side of the limiting plate and enters the pending groove. Then the cylinder moves back, driving the guide rod to slide upward from the other side of the limiting plate and enter the high-end groove section of the diversion groove, further driving the impurity removal rod to slide upward along the sliding rib and enter above the screening channel. As the cylinder continues to move back, it drives the guide rod to slide back along the high-end groove section of the diversion groove, so that the impurity removal rod always remains in the position above the screening channel. During the process of the impurity removal rod following the cylinder moving back, it can push larger impurities above the screening channel, such as branches and stones, etc., to the top of the impurity outlet plate, and the impurities slide out through the impurity outlet plate. When the cylinder moves back to the end point, the guide rod moves from the high-end groove section of the diversion groove to the low-end groove section, forming a cycle. When the cylinder moves forward, the coal block crushing component crushes the coal above the screening channel, and the impurity removal rod is in a retracted state to avoid interfering with the crushing operation. When the cylinder moves back, the impurity removal rod is in an extended state to remove the impurities above the screening channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of another perspective of the overall structure of the present invention;

[0023] Figure 3 is a schematic diagram of the coal feeding mechanism structure of the present invention;

[0024] Figure 4 is a schematic diagram of the disassembled structure of the coal feeding mechanism of the present invention;

[0025] Figure 5 is a schematic diagram of the screening plate and impurity outlet plate structure of the present invention;

[0026] Figure 6 is a schematic diagram of the sectional structure of the coal feeding mechanism of the present invention;

[0027] Figure 7 is a schematic diagram of the coal block crushing component structure of the present invention;

[0028] Figure 8 is a schematic diagram of another perspective of the coal block crushing component structure of the present invention;

[0029] Figure 9 is a schematic diagram of the internal structure of the coal block crushing component of the present invention;

[0030] Figure 10 is Figure 9 a schematic diagram of the structure at point A in

[0031] Figure 11Schematic diagram of the top structure of the first crushing rod of the present invention;

[0032] Figure 12 Schematic diagram of the feeding scraper structure of the present invention;

[0033] Figure 13 Schematic diagram of the impurity removing rod structure of the present invention;

[0034] Figure 14 Schematic diagram of the deflector structure of the present invention;

[0035] Figure 15 is Figure 14 Schematic diagram of the structure of point B in

[0036] Description of the reference numerals in the figure:

[0037] 1. Main body of the bridge-type transfer conveyor; 2. Coal feeding mechanism; 3. Coal discharge port;

[0038] 21. Fixed side plate; 22. Screening plate; 23. Feeding plate; 24. Impurity extraction plate; 25. Feeding frame; 26. Coal block crushing assembly; 27. Impurity removing assembly;

[0039] 2101. Lower movable groove; 2102. Upper movable groove; 2103. Support frame; 2104. Support plate; 2105. Wheel track; 2106. Multi-stage oil cylinder; 2107. Tooth opening;

[0040] 2201. Strip-shaped plate; 2202. Guiding inclined block;

[0041] 2601. Cylinder; 2602. Inclined rod; 2603. Pushing frame; 2604. Pulley; 2605. Rotating column; 2606. Gear; 2607. First rotating plate; 2608. Second rotating plate; 2609. Wheel groove; 2610. First crushing rod; 26101. Tooth-shaped plate; 2611. Wheel frame; 2612. Rolling wheel; 2613. Spring; 2614. Second crushing rod; 2615. Fixed plate; 2616. Support column; 2617. Material guiding plate; 2618. Arc-shaped rod; 2619. Feeding scraper;

[0042] 2701. Sliding convex strip; 2702. Impurity removing rod; 2703. T-shaped groove; 2704. Guide rod; 2705. Deflector; 2706. Deflection groove; 2707. Limiting plate; 2708. To-be-determined groove. Detailed implementation method

[0043] As Figures 1 to 15As shown in the figure, the present invention relates to a bridge-type transfer conveyor for coal mining, which includes a bridge-type transfer conveyor main body 1. A coal feeding mechanism 2 is arranged at the low end of the bridge-type transfer conveyor main body 1, and a coal discharge port 3 is arranged at the high end of the bridge-type transfer conveyor main body 1. Among them, the bridge-type transfer conveyor main body 1 is the prior art in the example. After the coal seam is mined in a thin coal seam, the bridge-type transfer conveyor main body 1 conveys the coal at the low end to the high end through the bridge-type transfer conveying mechanism inside it.

[0044] It usually utilizes the cooperation of the scraper chain and the driving device. The motor drives the sprocket to rotate, and the sprocket drives the scraper chain to make a cyclic movement in the middle trough. The scraper on the scraper chain pushes materials such as coal to move from the tail to the head direction in the middle trough, thereby realizing the continuous conveying of coal. Of course, in addition to using the cooperation of the scraper chain and the driving device for conveying, there are also bridge-type transfer conveyors using belt conveying. Whether it is a bridge-type transfer conveyor using the cooperation of the scraper chain and the driving device or a bridge-type transfer conveyor using belt conveying, they are all applicable to the present invention.

[0045] In the embodiment of the present invention, the coal feeding mechanism 2 includes two fixed side plates 21. The two fixed side plates 21 are symmetrical structures. The two fixed side plates 21 are connected by a screening plate 22 and a feeding plate 23. The screening plate 22 is arranged above the feeding plate 23. An impurity extraction plate 24 is connected to the side wall of the screening plate 22. A feeding frame 25 is arranged on the top of the fixed side plate 21; the screening plate 22 is used for screening coal, so that large coal blocks and impurities are retained on the top of the screening plate 22, and the crushed coal enters the top of the feeding plate 23, and then is conveyed through the bridge-type transfer conveyor main body 1; a coal block crushing assembly 26 is arranged between the screening plate 22 and the feeding plate 23, and an impurity removal assembly 27 is arranged on the side wall of the coal block crushing assembly 26; the coal block crushing assembly 26 has a reciprocating translational motion state. During the reciprocating translational motion process of the coal block crushing assembly 26, it can crush the coal on the top of the screening plate 22, so that the massive coal is crushed into multiple crushed coal pieces. At the same time, during the reciprocating translational motion process of the coal block crushing assembly 26, it can drive the impurity removal assembly 27 to repeatedly move the impurities on the top of the screening plate 22 to the top of the impurity extraction plate 24 for impurity removal operation; the present invention designs the coal feeding mechanism 2 to convey the coal mined from the thin coal seam into the bridge-type transfer conveyor main body 1 through the coal feeding mechanism 2 for conveying. The coal block crushing assembly 26 in the coal feeding mechanism 2 crushes the coal, so that the coal entering the bridge-type transfer conveyor main body 1 is in a loose crushed state. The impurity removal assembly 27 removes the obvious large impurities in the coal, such as branches and stones, etc., which can effectively prevent the problems that large coal blocks and impurities are easy to cause blockage inside the bridge-type transfer conveyor main body 1. The crushed coal can be easily conveyed by the bridge-type transfer conveyor main body 1, thereby improving the conveying efficiency.

[0046] As another embodiment of the present invention, the top of the screening plate 22 is composed of a plurality of strip plates 2201. A screening channel is formed between every two strip plates 2201. The top of the strip plate 2201 is set as an arc convex surface structure, which can introduce coal into the screening channel and reduce the problem that coal is likely to accumulate on the top surface of the strip plate 2201. A guiding inclined block 2202 is connected to the top of the screening plate 22. The side wall of the guiding inclined block 2202 is set as an inclined surface, and the guiding inclined block 2202 is used to block the coal on the top of the screening plate 22. The impurity outlet plate 24 is an arc curved plate structure and is used to divert impurities out.

[0047] As another embodiment of the present invention, a lower movable groove 2101 and an upper movable groove 2102 are formed in the side wall of the fixed side plate 21. A support frame 2103 and a support plate 2104 are connected to the side wall of the fixed side plate 21. A wheel rail 2105 is arranged on the top surface of the support plate 2104. A multi-stage oil cylinder 2106 is arranged on the top surface of the support frame 2103. The multi-stage oil cylinder 2106 is an existing technology in the example, also known as a telescopic hydraulic cylinder, which is a hydraulic cylinder with a multi-stage sleeve-shaped piston rod that can obtain a longer working stroke. A plurality of tooth openings 2107 are arranged at the inner top of the lower movable groove 2101, and the inner bottom of the lower movable groove 2101 is set as an inclined surface structure, which can effectively reduce the situation that coal may remain on the inner bottom of the lower movable groove 2101. The upper movable groove 2102 is an inclined long strip-shaped groove, and the function of the inclined long strip-shaped groove is to prevent coal from entering and causing blockage. The support plate 2104 is arranged at the notch of the upper movable groove 2102.

[0048] As another embodiment of the present invention, the coal block crushing assembly 26 includes a cylinder body 2601. A push frame 2603 is connected to the side wall of the cylinder body 2601 through a plurality of inclined rods 2602. A plurality of pulleys 2604 are arranged inside the push frame 2603. Among them, the inclined rods 2602 are movably arranged in the upper movable groove 2102. The push frame 2603 is slidably matched with the wheel rail 2105 through a plurality of pulleys 2604. The output end of the multi-stage oil cylinder 2106 is connected to the side wall of the push frame 2603. In the present invention, the multi-stage oil cylinder 2106 works to push the push frame 2603 to slide on the wheel rail 2105. The push frame 2603 drives the cylinder body 2601 to move, and the output end of the multi-stage oil cylinder 2106 makes a reciprocating telescopic motion, driving the cylinder body 2601 to make a reciprocating translation motion under the screening plate 22.

[0049] Further, a rotating column 2605 is movably arranged in the inner cavity of the cylinder body 2601. One end of the rotating column 2605 penetrates through the side wall of the cylinder body 2601 and is movably arranged in the lower movable groove 2101. A gear 2606 is connected to one end of the rotating column 2605, and the gear 2606 is meshed and connected with the tooth opening 2107; a plurality of first rotating plates 2607 and a plurality of second rotating plates 2608 are connected to the circumferential outer wall of the rotating column 2605; the side wall of the first rotating plate 2607 is an annular concave-convex arc surface structure, the second rotating plate 2608 has the same structure as the side wall of the first rotating plate 2607, and the concave-convex arc surface structures of the side walls of the second rotating plate 2608 and the first rotating plate 2607 are alternately distributed; a plurality of first rotating plates 2607 and a plurality of second rotating plates 2608 are alternately arranged. A wheel groove 2609 is formed in the side wall of the first rotating plate 2607. A first crushing rod 2610 is arranged above the first rotating plate 2607. The first crushing rod 2610 penetrates through the top of the cylinder body 2601 and is movably matched with the top of the cylinder body 2601. A wheel frame 2611 is connected to the bottom of the first crushing rod 2610. A rolling wheel 2612 is arranged in the wheel frame 2611. The rolling wheel 2612 is movably arranged in the wheel groove 2609. A spring 2613 is sleeved on the circumferential outer wall of the first crushing rod 2610. The spring 2613 is arranged above the wheel frame 2611; a second crushing rod 2614 is arranged above the second rotating plate 2608. The second crushing rod 2614 has the same structural components as the first crushing rod 2610. The first crushing rod (2610) and the second crushing rod (2614) are arranged in the screening channel;

[0050] Further, by making the cylinder body 2601 reciprocally translate below the screening plate 22, the rotating column 2605 is driven to reciprocally slide in the lower movable groove 2101, further enabling the gear 2606 to reciprocally move along the tooth opening 2107, causing the gear 2606 to rotate and move, further driving the rotating column 2605 to reciprocally rotate and move in the lower movable groove 2101. During the rotation and movement of the rotating column 2605, a plurality of first rotating plates 2607 and a plurality of second rotating plates 2608 are driven to rotate. Affected by the annular concave-convex arc surface structure of the side wall of the first rotating plate 2607, during the relative sliding of the rolling wheel 2612 and the wheel groove 2609, the rolling wheel 2612 reciprocally moves up and down in the vertical direction, further driving the first crushing rod 2610 to reciprocally move up and down. Similarly, the second crushing rod 2614 also reciprocally moves up and down. Due to the alternating distribution of the concave-convex arc surface structures of the side walls of the second rotating plate 2608 and the first rotating plate 2607, a plurality of first crushing rods 2610 and a plurality of second crushing rods 2614 alternately reciprocally move up and down. During the upward movement of the first crushing rod 2610 and the second crushing rod 2614, they can be inserted upward from the screening channel to crush the large pieces of coal remaining above the screening channel, and the crushed coal falls from the screening channel;

[0051] In the present invention, by arranging the concave-convex arc surface structures on the side walls of the first rotating plate 2607 and the second rotating plate 2608 in an alternating manner, multiple first crushing rods 2610 and multiple second crushing rods 2614 perform alternating up-and-down reciprocating movements to crush the large pieces of coal remaining above the screening channel. When the cylindrical body 2601 makes a reciprocating translational movement below the screening plate 22, the first crushing rods 2610 and the second crushing rods 2614 can perform reciprocating translation during the alternating crushing operation in the screening channel, achieving a comprehensive crushing operation on the coal above the screening channel, reducing the crushing blind area, and making the crushing effect more comprehensive.

[0052] As another embodiment of the present invention, the top of the first crushing rod 2610 is provided with a conical structure. A plurality of toothed plates 26101 are connected to the circumferential outer wall of the first crushing rod 2610, and the side wall of the toothed plate 26101 is a serrated structure. The second crushing rod 2614 has the same structure as the first crushing rod 2610. The conical structure is used to pierce and crush the coal, and the toothed plate 26101 is used to cut and crush the coal. By setting the tops of the first crushing rod 2610 and the second crushing rod 2614 as conical structures, the first crushing rod 2610 and the second crushing rod 2614 can more easily insert into the coal to achieve the crushing operation of the coal. By connecting the toothed plate 26101 to the circumferential outer wall of the first crushing rod 2610 and using the serrated structure on the side wall of the toothed plate 26101, the first crushing rod 2610 and the second crushing rod 2614 can form a cutting and crushing effect on the coal above the screening channel and the coal stuck inside the screening channel during the lifting process, further improving the crushing effect on the coal.

[0053] As another embodiment of the present invention, a plurality of support columns 2616 are connected to the outer side wall of the cylinder body 2601 through fixing plates 2615. One end of each support column 2616 is connected to a material guiding plate 2617, and the bottom of each support column 2616 is rotatably connected to an arc-shaped rod 2618. The bottom of the arc-shaped rod 2618 is connected to a feeding scraping plate 2619. Among them, the material guiding plate 2617 is in the shape of an arc-shaped curved plate structure. When the coal block crushing assembly 26 moves reciprocally, the material guiding plate 2617 is used to guide the coal falling from the screening plate 22 into the front of the feeding scraping plate 2619. In the present invention, the coal falling from the screening channel of the screening plate 22 enters the top of the feeding plate 23. When the cylinder body 2601 moves forward, it can drive the feeding scraping plate 2619 to scrape forward. The feeding scraping plate 2619 scrapes the coal on the top of the feeding plate 23 into the inside of the main body 1 of the bridge-type transfer conveyor for conveying. The continuously falling coal in the screening channel of the screening plate 22, a part of it slides down from the top of the cylinder body 2601 into the lower part of the cylinder body 2601, that is, into the top of the feeding plate 23, and another part slides into the lower part of the cylinder body 2601 through the arc-shaped curved plate structure of the material guiding plate 2617, that is, into the top of the feeding plate 23. When the cylinder body 2601 moves back, the bottom of the feeding scraping plate 2619 is blocked by the coal, so that the feeding scraping plate 2619 rotates along the bottom of the support column 2616, and the bottom of the feeding scraping plate 2619 loses the function of scraping coal, which can avoid scraping the coal back. Then, when the cylinder body 2601 moves forward again, it drives the feeding scraping plate 2619 to scrape the coal on the top of the feeding plate 23 into the inside of the main body 1 of the bridge-type transfer conveyor for conveying again. In this way, it circulates repeatedly to achieve a continuous coal conveying effect.

[0054] As another embodiment of the present invention, the impurity removal assembly 27 includes a plurality of sliding ridges 2701 connected to the outer side wall of the cylinder body 2601. The side wall of the sliding ridge 2701 is provided with impurity removal rods 2702. The side wall of the impurity removal rod 2702 is provided with a T-shaped groove 2703. The impurity removal rod 2702 is slidably engaged with the sliding ridge 2701 through the T-shaped groove 2703. There are a plurality of impurity removal rods 2702, and every two impurity removal rods 2702 are connected by a guide rod 2704. The impurity removal assembly 27 further includes a guide plate 2705 connected to the inner side wall of the fixed side plate 21. The side wall of the guide plate 2705 is provided with a guide groove 2706. One end of the guide rod 2704 is movably arranged in the guide groove 2706. Wherein, the guide groove 2706 is a closed annular structure. The guide groove 2706 includes a high-end groove section and a low-end groove section. The high-end groove section and the low-end groove section are connected by an inclined groove section. A to-be-determined groove 2708 is arranged in the low-end groove section of the guide groove 2706. A limiting plate 2707 is movably arranged on the inner side wall of the guide groove 2706. The limiting plate 2707 is arranged in the to-be-determined groove 2708. In the present invention, when the cylinder body 2601 moves forward, it can drive the guide rod 2704 to slide forward along the low-end groove section of the guide groove 2706, so that the impurity removal rod 2702 always remains in the same position on the sliding ridge 2701 until the guide rod 2704 is pushed out from one side of the limiting plate 2707 and enters the to-be-determined groove 2708. Then the cylinder body 2601 moves back, thereby driving the guide rod 2704 to slide upward from the other side of the limiting plate 2707 and enter the high-end groove section of the guide groove 2706, further driving the impurity removal rod 2702 to slide upward along the sliding ridge 2701 and enter above the screening channel. As the cylinder body 2601 continues to move back, it drives the guide rod 2704 to slide back along the high-end groove section of the guide groove 2706, so that the impurity removal rod 2702 always remains in the position above the screening channel unchanged. During the process of the impurity removal rod 2702 following the cylinder body 2601 to move back, it can push larger impurities above the screening channel, such as branches and stones, etc. to the top of the impurity lead-out plate 24, and the impurities slide out through the impurity lead-out plate 24. When the cylinder body 2601 moves back to the end point, the guide rod 2704 moves from the high-end groove section of the guide groove 2706 to the low-end groove section, forming a cycle. When the cylinder body 2601 moves forward, the coal block crushing assembly 26 crushes the coal above the screening channel. The impurity removal rod 2702 is in a contracted state to avoid interfering with the crushing operation. When the cylinder body 2601 moves back, the impurity removal rod 2702 is in an extended state to remove the impurities above the screening channel.

[0055] Working principle: This embodiment provides a bridge-type transfer conveyor for coal mining. When in use, the coal mined from the coal seam is put into the top of the screening plate 22 from the feeding frame 25. A part of the coal falls through the screening channel of the screening plate 22 and enters the top of the feed plate 23. When the cylinder 2601 moves forward, it can drive the feed scraper 2619 to scrape forward. The feed scraper 2619 scrapes the coal on the top of the feed plate 23 into the bridge-type transfer conveyor body 1 for transportation. The other part of the larger coal and impurities are screened on the top of the screening plate 22, and the output end of the multi-stage oil cylinder 2106 performs reciprocating telescopic motion, driving the cylinder 2601 to perform reciprocating translational motion under the screening plate 22, further driving the rotating column 2605 to perform reciprocating sliding in the lower movable groove 2101, further causing the gear 2606 to perform reciprocating motion along the tooth mouth 2107, so that the gear 2606 rotates and moves, further driving the rotating column 2605 to perform reciprocating rotation in the lower movable groove 2101. During the rotation and movement of the rotating column 2605, the plurality of rotating plates 1 2607 and the plurality of rotating plates 2 2608 are driven to rotate. The rolling wheel 2612 is affected by the annular concave-convex arc surface structure of the side wall of the rotating plate 1 2607, so that during the relative sliding between the rolling wheel 2612 and the wheel groove 2609, the rolling wheel 2612 reciprocates up and down in the vertical direction, further driving the first crushing rod 2610 to reciprocate up and down. Similarly, the second crushing rod 2614 also reciprocates up and down. Since the concave-convex arc surface structures of the rotating plate 2 2608 and the side wall of the rotating plate 1 2607 are staggered with each other, the plurality of first crushing rods 2610 and the plurality of second crushing rods 2614 reciprocate up and down alternately. During the upward movement of the first crushing rod 2610 and the second crushing rod 2614, they can be inserted upward from the screening channel to crush the large pieces of coal retained above the screening channel, and the crushed coal falls from the screening channel.Meanwhile, when the cylinder body 2601 moves forward, it can drive the guide rod 2704 to slide forward along the low-end groove section of the diversion groove 2706, so that the impurity removal rod 2702 always remains in the same position on the sliding rib 2701 until the guide rod 2704 is ejected from one side of the limiting plate 2707 and enters the to-be-determined groove 2708. Then the cylinder body 2601 moves back, thereby driving the guide rod 2704 to slide upward from the other side of the limiting plate 2707 and enter the high-end groove section of the diversion groove 2706, further driving the impurity removal rod 2702 to slide upward along the sliding rib 2701 and enter above the screening channel. As the cylinder body 2601 continues to move back, it drives the guide rod 2704 to slide back along the high-end groove section of the diversion groove 2706, so that the impurity removal rod 2702 always remains in the same position above the screening channel. During the process of the impurity removal rod 2702 moving back with the cylinder body 2601, it can push the larger impurities above the screening channel, such as branches and stones, etc., to the top of the impurity outlet plate 24, and the impurities slide out through the impurity outlet plate 24. When the cylinder body 2601 moves back to the end point, the guide rod 2704 moves from the high-end groove section of the diversion groove 2706 to the low-end groove section, forming a cyclic impurity removal operation.;

[0056] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention according to the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A bridge type transfer conveyor for coal mining, characterized in that: It comprises a bridge-type transfer conveyor body (1), a coal feeding mechanism (2) being arranged at the lower end of the bridge-type transfer conveyor body (1), and a coal discharge port (3) being arranged at the upper end of the bridge-type transfer conveyor body (1); The coal feeding mechanism (2) comprises two fixed side plates (21), the two fixed side plates (21) are symmetrical structures, the two fixed side plates (21) are connected via a screening plate (22) and a feeding plate (23), the screening plate (22) is arranged above the feeding plate (23), the side wall of the screening plate (22) is connected to an impurity outlet plate (24), and a feeding frame (25) is arranged on the top of the fixed side plate (21); The screening plate (22) is used to screen the coal, so that large pieces of coal and impurities are retained on the top of the screening plate (22), and the crushed coal enters the top of the feed plate (23), and then is transported through the bridge-type transfer conveyor body (1); A coal crushing assembly (26) is arranged between the screening plate (22) and the feed plate (23), and a debris removal assembly (27) is arranged on a side wall of the coal crushing assembly (26); The coal crushing component (26) has a reciprocating translational motion state. During the reciprocating translational motion, the coal crushing component (26) can crush the coal on the top of the screening plate (22) to break the lump coal into a plurality of pieces of coal. At the same time, during the reciprocating translational motion, the coal crushing component (26) can drive the impurity removal component (27) to repeatedly and continuously move the impurities on the top of the screening plate (22) to the top of the impurity outlet plate (24) to perform the impurity removal operation.

2. A bridge type transfer conveyor for coal mining according to claim 1, characterized in that: The top of the screening plate (22) is composed of a plurality of strip plates (2201), a screening channel is formed between every two of the strip plates (2201), and the top of the strip plates (2201) is configured as an arc convex structure; A guide inclined block (2202) is connected to the top of the screening plate (22); a side wall of the guide inclined block (2202) is arranged as an inclined surface; and the guide inclined block (2202) is used to shield the coal on the top of the screening plate (22); The impurity outlet plate (24) is an arc-shaped curved plate structure and is used to guide impurities out.

3. A bridge type transfer conveyor for coal mining according to claim 2, characterized in that: The side wall of the fixed side plate (21) is provided with a lower movable groove (2101) and an upper movable groove (2102); The side wall of the fixed side plate (21) is connected to a support frame (2103) and a support plate (2104); a wheel track (2105) is arranged on the top surface of the support plate (2104); and a multi-stage oil cylinder (2106) is arranged on the top surface of the support frame (2103); The top of the lower movable groove (2101) is provided with a plurality of tooth openings (2107), and the bottom of the lower movable groove (2101) is provided with an inclined surface structure; The upper movable groove (2102) is an inclined long strip groove, and the support plate (2104) is arranged at the groove opening of the upper movable groove (2102).

4. A bridge type transfer conveyor for coal mining according to claim 3, characterized in that: The coal crushing assembly (26) comprises a cylinder (2601), the side wall of the cylinder (2601) is connected to a push frame (2603) via a plurality of inclined rods (2602), and a plurality of pulleys (2604) are arranged inside the push frame (2603); Wherein, the oblique rod (2602) is movably arranged in the upper movable groove (2102); The push frame (2603) is slidably matched with the wheel rail (2105) via a plurality of pulleys (2604); The output end of the multi-stage oil cylinder (2106) is connected to the side wall of the push frame (2603).

5. A bridge type transfer conveyor for coal mining according to claim 4, characterized in that: A rotating column (2605) is movably arranged in the inner cavity of the cylinder (2601), one end of the rotating column (2605) passes through the side wall of the cylinder (2601) and is movably arranged in the lower movable groove (2101), one end of the rotating column (2605) is connected to a gear (2606), and the gear (2606) is meshedly connected with the tooth opening (2107); The outer circumferential wall of the rotating column (2605) is connected to a plurality of rotating plates 1 (2607) and a plurality of rotating plates 2 (2608); The side wall of the rotating plate 1 (2607) is a ring-shaped concave-convex arc surface structure, the rotating plate 2 (2608) has the same structure as the side wall of the rotating plate 1 (2607), and the concave-convex arc surface structures of the rotating plate 2 (2608) and the rotating plate 1 (2607) are staggered with each other; The plurality of rotating plates one (2607) and the plurality of rotating plates two (2608) are arranged alternately with each other.

6. A bridge type transfer conveyor for coal mining according to claim 5, characterized in that: A wheel groove (2609) is formed on the side wall of the rotating plate 1 (2607); a first breaker rod (2610) is arranged above the rotating plate 1 (2607); the first breaker rod (2610) passes through the top of the cylinder (2601) and movably cooperates with the top of the cylinder (2601); a wheel frame (2611) is connected to the bottom of the first breaker rod (2610); a rolling wheel (2612) is arranged in the wheel frame (2611); the rolling wheel (2612) is movably arranged in the wheel groove (2609); a spring (2613) is sleeved on the outer circumferential wall of the first breaker rod (2610); and the spring (2613) is arranged above the wheel frame (2611); A second crushing rod (2614) is arranged above the second rotating plate (2608), and the second crushing rod (2614) is arranged with the same structural components as the first crushing rod (2610).

7. A bridge type transfer conveyor for coal mining according to claim 6, characterized in that: The top of the first crushing rod (2610) is set as a conical structure, and the outer wall of the circumference of the first crushing rod (2610) is connected to a plurality of toothed plates (26101). The second crushing rod (2614) has the same structure as the first crushing rod (2610). The first crushing rod (2610) and the second crushing rod (2614) are arranged in the screening channel. The conical structure is used to penetrate and crush the coal, and the toothed plates (26101) are used to cut and crush the coal.

8. A bridge type transfer conveyor for coal mining according to claim 7, characterized in that: The outer wall of the cylinder (2601) is connected to a plurality of support columns (2616) via a fixing plate (2615); one end of the support column (2616) is connected to a material guide plate (2617); the bottom of the support column (2616) is rotatably connected to an arc-shaped rod (2618); the bottom of the arc-shaped rod (2618) is connected to a feed scraper (2619); and the feed scraper (2619) is arranged on the top of the feed plate (23); The guide plate (2617) is a circular arc curved plate structure, and the guide plate (2617) is used to guide the coal falling from the screening plate (22) into the front of the feed scraper (2619) when the coal crushing assembly (26) moves back and forth.

9. A bridge type transfer conveyor for coal mining according to claim 8, characterized in that: The impurity removal component (27) comprises a plurality of sliding convex strips (2701) connected to the outer wall of the cylinder (2601); a impurity removal rod (2702) is arranged on the side wall of the sliding convex strip (2701); a T-shaped groove (2703) is formed on the side wall of the impurity removal rod (2702); and the impurity removal rod (2702) is slidably matched with the sliding convex strip (2701) via the T-shaped groove (2703); There are a plurality of impurity removal rods (2702), and every two impurity removal rods (2702) are connected via a guide rod (2704). The impurity removal rods (2702) are arranged below the screening channel.

10. A bridge type transfer conveyor for coal mining according to claim 9, characterized in that: The impurity removal component (27) further comprises a guide plate (2705) connected to the inner side wall of the fixed side plate (21), the side wall of the guide plate (2705) being provided with a guide groove (2706), and one end of the guide rod (2704) being movably arranged in the guide groove (2706); The guide groove (2706) is a closed annular structure, and the guide groove (2706) includes a high-end groove section and a low-end groove section, and the high-end groove section and the low-end groove section are connected by an oblique groove section. A to-be-determined groove (2708) is arranged in the low-end groove section of the guide groove (2706), and a limiting plate (2707) is movably arranged on the inner side wall of the guide groove (2706), and the limiting plate (2707) is arranged in the to-be-determined groove (2708).

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