A scraper conveyor for coal mines

Abstract

This invention discloses a scraper conveyor for coal mines, relating to the field of scraper conveyors. It includes a scraper conveyor body, on which a feed box, a discharge port, and a drive motor are mounted. A drive shaft is installed inside the scraper conveyor body, and the drive motor is connected to the drive shaft. Multiple base plates are slidably mounted on the bottom side of the scraper conveyor body, and these base plates are movably connected. It also includes a base plate flatness detection mechanism. It should be noted that in this invention, during the operation of the scraper conveyor, a transverse sliding frame reciprocates to actively detect the base plates. If the deformation of the bottom side of a base plate is too large, a switching spring pulls a switching bracket to move, thereby causing multiple base plates to move. This causes one base plate to detach from the scraper conveyor body, and another base plate to move to the bottom side of the scraper conveyor body, thus achieving automatic switching of the base plates. This allows the scraper conveyor body to operate continuously, ensuring conveying efficiency.

Description

Technical Field

[0001] This invention relates to the field of scraper conveyor technology, and more particularly to a scraper conveyor for coal mines. Background Technology

[0002] Scraper conveyors are transportation machines used in coal mine working faces. They are continuous transport devices that convey bulk materials within a closed rectangular cross-section shell using a moving scraper chain. These machines are simple in structure, have good sealing properties, are easy to install and maintain, and offer flexible process layout. It should be noted that scraper conveyors can transport materials horizontally, as well as inclined or vertically. They can be used individually or in combination, with multiple feeding and unloading points. Furthermore, due to their enclosed shell, they significantly improve the working environment for workers and reduce environmental pollution, making them widely used in daily mining and transportation operations in coal mines.

[0003] Traditional scraper conveyors have a fixed, monolithic or large-block base plate. Monitoring typically relies on manual inspections, periodic shutdowns for checks, or simple static sensors. This approach cannot achieve real-time, dynamic, and accurate detection of localized base plate flatness during operation. Furthermore, if severe wear or deformation leading to unevenness is detected, prolonged downtime and manual disassembly of numerous bolts or structural components are required to replace the entire or large area of ​​the base plate. These factors result in a significant decrease in production efficiency, high maintenance costs, high labor intensity, and significant safety risks. They also severely restrict conveying capacity and production efficiency, and worsen the working environment and safety conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a scraper conveyor for coal mines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A scraper conveyor for coal mines includes a scraper conveyor body, a feed box, a discharge port and a drive motor are installed on the scraper conveyor body, a drive shaft is installed inside the scraper conveyor body, the drive motor is connected to the drive shaft, and multiple base plates are slidably installed on the bottom side of the scraper conveyor body and the multiple base plates are movably connected. It also includes a bottom plate flatness detection mechanism, which is installed on the scraper conveyor body and is used to detect the flatness of the bottom plate. The bottom plate flatness detection mechanism includes a sliding detection bar. A main mounting plate and an auxiliary mounting plate are respectively installed on the scraper conveyor body and the discharge port. A transverse sliding frame is slidably installed on the main mounting plate and the auxiliary mounting plate, and the sliding detection bar is movably installed on the transverse sliding frame. An automatic bottom plate switching mechanism is installed on the scraper conveyor body. Multiple bottom plates are movably installed on the automatic bottom plate switching mechanism, which is used to switch between the multiple bottom plates. The automatic bottom plate switching mechanism includes two mounting sleeves, which are respectively installed on the scraper conveyor body and the discharge port. A switching slide is movably installed inside each of the two mounting sleeves. Two switching brackets are installed on one of the bottom plates away from the scraper conveyor body, and the two switching slides are respectively installed on the two switching brackets. It also includes a feed holding mechanism, which is installed on the feed box and is used to screen the feed. The feed holding mechanism includes a feed screen plate, which is installed in the feed box. A driven shaft is rotatably installed on the feed box, and a cam is installed on the driven shaft. The cam rotates to drive the feed screen plate to move.

[0006] Furthermore, in a preferred embodiment of the present invention, the bottom plate flatness detection mechanism further includes a transfer rotating column, and two rotating brackets are installed on one side of the scraper conveyor body, with the transfer rotating column rotatably installed in the two rotating brackets; A drive sleeve is installed on the transverse sliding frame, and the drive sleeve is movably sleeved on the adapter rotating column. Multiple clamping springs are installed between the transverse sliding frame and the sliding detection strip.

[0007] Furthermore, in a preferred embodiment of the present invention, a drive ring groove is provided annularly inclined on the adapter rotating column, and a drive hemisphere is installed on the inner wall of the drive sleeve, the drive hemisphere being movably installed in the drive ring groove.

[0008] Furthermore, in a preferred embodiment of the present invention, both the adapter rotating column and the transmission shaft are equipped with transmission pulleys, and a first belt is sleeved on the two transmission pulleys.

[0009] Furthermore, in a preferred embodiment of the present invention, the automatic switching mechanism for the base plate further includes two lowering unlocking frames, and two limiting sliding holes are provided on the sliding detection bar, with the two lowering unlocking frames slidably installed in the two limiting sliding holes respectively; The bottom side of the switching carriage is provided with multiple switching slots, and the two lowering unlocking frames are each equipped with a switching rod, which is inserted into the two switching slots at the corresponding positions.

[0010] Furthermore, in a preferred embodiment of the present invention, both the main mounting plate and the auxiliary mounting plate are provided with lifting grooves, and both of the two lowering unlocking frames are equipped with lifting slide plates, which are slidably installed in the two lifting grooves respectively. A support spring is installed on the bottom inner wall of the lifting slide, and the support spring is installed on the lifting slide plate.

[0011] Furthermore, in a preferred embodiment of the present invention, a switching spring is installed on the switching bracket, the switching spring is mounted on the mounting sleeve, and the contraction of the switching spring drives the switching bracket to move, thereby driving the base plate to move.

[0012] Furthermore, in a preferred embodiment of the present invention, the feed holding mechanism further includes an auxiliary pulley, which is mounted on the driven shaft; A drive pulley is mounted on the drive shaft, and a second belt is sleeved on the auxiliary pulley and the drive pulley.

[0013] Furthermore, in a preferred embodiment of the present invention, a limiting mounting bracket is installed on both inner walls of the feed box, and two pull-down sleeves are installed on the feed screen plate, with the two limiting mounting brackets respectively movably installed in the two pull-down sleeves; A vibration spring is installed on the bottom side of the limiting mounting bracket, and the vibration spring is installed on the inner wall of the pull-down sleeve.

[0014] Furthermore, in a preferred embodiment of the present invention, a vibration frame is installed on the inner wall of the feed box, and the feed screen plate moves down to contact the vibration frame to vibrate the feed screen plate.

[0015] The beneficial effects of the scraper conveyor for coal mines proposed in this invention are: In this invention, the base plate flatness detection mechanism, when the drive shaft rotates, drives the drive pulley to rotate, which in turn drives another drive pulley via a first belt. This, in turn, causes the transition rotating column to rotate. The transition rotating column rotates on two rotating supports, and its rotation drives the drive hemisphere block to move via the drive ring groove. The drive hemisphere block then drives the drive sleeve to move, which in turn drives the transverse sliding frame to move, allowing the transverse sliding frame to slide on the main mounting plate and the auxiliary mounting plate. It should be noted that when the transition rotating column rotates one revolution, the transverse sliding frame reciprocates once. This movement of the transverse sliding frame drives the sliding detection strip to move, allowing the sliding detection strip to perform sliding detection on the bottom side of the base plate. If the bottom side of the base plate deforms, the sliding detection strip is compressed and moves up and down on the transverse sliding frame, causing multiple clamping springs to retract. This achieves active detection of the base plate without manual intervention, effectively reducing the operating costs of the scraper conveyor.

[0016] Furthermore, in this invention, by setting up an automatic bottom plate switching mechanism, if the deformation of the bottom side of the bottom plate is too large, the sliding detection bar will continuously move downwards. The movement of the sliding detection bar will drive the lowering unlocking frame to move downwards, causing the lowering unlocking frame to drive the switching rod to disengage from the switching slot. At this time, under the pull force of the switching spring, the switching bracket will drive multiple bottom plates to move, thereby causing one bottom plate to disengage from the scraper conveyor body and causing another bottom plate to move to the bottom side of the scraper conveyor body. At this time, the switching rod will be inserted into the corresponding switching slot, thereby realizing the automatic switching of the bottom plates, allowing the scraper conveyor body to operate continuously and ensuring conveying efficiency. In addition, real-time detection and timely replacement can effectively avoid additional wear and extra stress on the structure of the scraper conveyor caused by uneven bottom plates, extending the service life of the entire machine.

[0017] Furthermore, in this invention, by setting up a feeding holding mechanism, the raw material is blocked and screened by the feeding screen plate during feeding. At the same time, when the transmission shaft rotates, it drives the drive pulley to rotate, which in turn drives the auxiliary pulley to rotate via the second belt, thereby driving the transmission shaft to rotate. The driven shaft rotates, causing the cam to rotate. When the cam rotates, it pushes the feeding screen plate upward. The upward movement of the feeding screen plate moves on two limiting mounting brackets through two pull-down sleeves, and causes two vibration springs to be stressed. When the cam continues to rotate, the protruding side of the cam moves away from the feeding screen plate, and then, under the rebound force of the two vibration springs, it pushes the feeding screen plate to move downward quickly and is blocked by the vibration frame. This causes the feeding screen plate to vibrate, which can both screen the feed and prevent the feeding screen plate from clogging, helping the raw material to pass through the feeding screen plate better, thereby achieving the purpose of maintaining uninterrupted feeding. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a scraper conveyor for coal mines provided in an embodiment of the present invention; Figure 2 This invention provides a schematic diagram of the connection between a sliding detection strip and an installation sleeve in a scraper conveyor used in coal mines, as provided in an embodiment of the invention. Figure 3 A scraper conveyor for coal mines is provided as an embodiment of the present invention. Figure 2 A schematic diagram of the structure of part A; Figure 4 This is a schematic diagram of the structure of the transfer rotating column of a scraper conveyor for coal mines, provided in an embodiment of the present invention. Figure 5 This is a partial cross-sectional schematic diagram of the connection between the transfer rotating column and the drive sleeve and other structures of a scraper conveyor for coal mines, provided in an embodiment of the present invention. Figure 6This is a schematic diagram of the connection between the switching slide and the switching support of a scraper conveyor for coal mines, provided in an embodiment of the present invention. Figure 7 This is a partial structural diagram illustrating the connection between the lifting slide plate and supporting springs of a scraper conveyor used in coal mines, as provided in an embodiment of the present invention. Figure 8 This is a partial cross-sectional view of the connection between the sliding detection strip and the transverse sliding frame of a scraper conveyor used in coal mines, as provided in an embodiment of the present invention. Figure 9 This is a partial cross-sectional view of the connection between the switching slide and the switching rod of a scraper conveyor for coal mines, as provided in an embodiment of the present invention. Figure 10 This is a cross-sectional structural diagram showing the connection between the feed screen plate and the limiting mounting frame of a scraper conveyor for coal mines, as provided in an embodiment of the present invention.

[0019] In the diagram: 1. Scraper conveyor body; 2. Feed box; 3. Discharge port; 4. Drive shaft; 5. Drive motor; 6. Base plate; 7. Base plate flatness detection mechanism; 701. Sliding detection strip; 702. Main mounting plate; 703. Auxiliary mounting plate; 704. Transverse sliding frame; 705. Clamping spring; 706. Rotating bracket; 707. Transition rotating column; 708. Drive ring groove; 709. Drive hemispherical block; 710. Transmission pulley; 711. First belt; 712. Drive sleeve; 8. Base plate automatic switching mechanism; 801. Mounting sleeve; 8 02. Switching carriage; 803. Switching spring; 804. Switching bracket; 805. Restricting slide hole; 806. Lowering unlocking bracket; 807. Switching insert rod; 808. Switching slot; 809. Lifting slide rail; 810. Lifting slide plate; 811. Support spring; 9. Feed holding mechanism; 901. Feed screen plate; 902. Restricting mounting bracket; 903. Pull-down sleeve; 904. Vibration spring; 905. Vibration frame; 906. Driven shaft; 907. Cam; 908. Auxiliary pulley; 909. Second belt; 910. Drive pulley. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] Furthermore, in the description of this invention, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "perpendicular" do not imply that components must be absolutely vertical, but rather that they can be slightly tilted. For example, "vertical" simply means that its direction is more vertical relative to "horizontal," not that the structure must be completely vertical, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Please refer to the attached instruction manual. Figures 1-10 The present invention provides a scraper conveyor for coal mines, which includes a scraper conveyor body 1, a feed box 2, a discharge port 3 and a drive motor 5 installed on the scraper conveyor body 1, a drive shaft 4 installed inside the scraper conveyor body 1, the drive motor 5 and the drive shaft 4 being connected in transmission, and a plurality of bottom plates 6 being slidably installed on the bottom side of the scraper conveyor body 1, the plurality of bottom plates 6 being movably connected.

[0027] Furthermore, in this embodiment of the invention, a bottom plate flatness detection mechanism 7 is also included. The bottom plate flatness detection mechanism 7 is installed on the scraper conveyor body 1 and is used to detect the flatness of the bottom plate 6. Specifically, the bottom plate flatness detection mechanism 7 includes a sliding detection bar 701. A main mounting plate 702 and an auxiliary mounting plate 703 are respectively installed on the scraper conveyor body 1 and the discharge port 3. A transverse sliding frame 704 is slidably installed on the main mounting plate 702 and the auxiliary mounting plate 703. The sliding detection bar 701 is movably installed on the transverse sliding frame 704. It should be noted that, in this embodiment of the invention, when the scraper conveyor body 1 is started and the driven shaft 906 rotates, the transverse sliding frame 704 reciprocates. The movement of the transverse sliding frame 704 drives the sliding detection strip 701 to move, so that the sliding detection strip 701 performs sliding detection on the bottom side of the base plate 6. If the bottom side of the base plate 6 is deformed, the sliding detection strip 701 is squeezed and moves up and down on the transverse sliding frame 704, and the multiple clamping springs 705 contract, thereby realizing active detection of the base plate 6.

[0028] Please refer to the instruction manual attached. Figures 2-3 and Figures 6-9 Furthermore, in an embodiment of the present invention, a scraper conveyor for coal mines is provided, wherein an automatic bottom plate switching mechanism 8 is installed on the scraper conveyor body 1, and multiple bottom plates 6 are movably installed on the automatic bottom plate switching mechanism 8. The automatic bottom plate switching mechanism 8 is used to switch the multiple bottom plates 6. Specifically, the automatic bottom plate switching mechanism 8 includes two mounting sleeves 801, which are respectively installed on the scraper conveyor body 1 and the discharge port 3. A switching slide 802 is movably installed in each of the two mounting sleeves 801. Two switching brackets 804 are installed on a bottom plate 6 away from the scraper conveyor body 1, and the two switching slides 802 are respectively installed on the two switching brackets 804. It should be noted that in this embodiment of the invention, when the deformation of the bottom side of the base plate 6 is too large, the switching slide 802 will automatically unlock. At this time, under the pull force of the switching spring 803, the switching bracket 804 will drive multiple base plates 6 to move, thereby causing one base plate 6 to detach from the scraper conveyor body 1 and causing another base plate 6 to move to the bottom side of the scraper conveyor body 1, thereby realizing the automatic switching of the base plates 6, so that the scraper conveyor body 1 can operate continuously and ensure conveying efficiency.

[0029] More specifically, in this embodiment of the invention, a feed holding mechanism 9 is also included. The feed holding mechanism 9 is installed on the feed box 2 and is used to screen the feed. The feed holding mechanism 9 includes a feed screen plate 901, which is installed in the feed box 2. A driven shaft 906 is rotatably installed on the feed box 2, and a cam 907 is installed on the driven shaft 906. The cam 907 rotates to drive the feed screen plate 901 to move. It should be noted that, in this embodiment of the invention, when the scraper conveyor body 1 is feeding material, the raw material is blocked and screened by the feeding screen plate 901. At the same time, when the transmission shaft 4 rotates, the driven shaft 906 drives the cam 907 to rotate, so that the cam 907 pushes the feeding screen plate 901 upward when rotating. When the cam 907 continues to rotate, the feeding screen plate 901 moves downward rapidly and is blocked by the vibration frame 905, thereby causing the feeding screen plate 901 to vibrate. This can both screen the feeding material and prevent the feeding screen plate 901 from clogging, helping the raw material to pass through the feeding screen plate 901 better, thereby achieving the purpose of maintaining uninterrupted feeding.

[0030] Please refer to the instruction manual attached. Figures 2-6 Furthermore, the scraper conveyor for coal mines provided in this embodiment of the invention includes a bottom plate flatness detection mechanism 7 that further includes a transition rotating column 707. Two rotating brackets 706 are installed on one side of the scraper conveyor body 1, and the transition rotating column 707 is rotatably installed in the two rotating brackets 706. Furthermore, a drive sleeve 712 is installed on the transverse sliding frame 704, and the drive sleeve 712 is movably sleeved on the transition rotating column 707. Multiple clamping springs 705 are installed between the transverse sliding frame 704 and the sliding detection bar 701. It should be noted that, in this embodiment of the invention, when the transition rotating column 707 rotates, it drives the drive sleeve 712 to move. The movement of the drive sleeve 712 drives the transverse sliding frame 704 to move, and the movement of the transverse sliding frame 704 drives the sliding detection bar 701 to move, thus detecting the bottom side of the base plate 6. The multiple clamping springs 705 ensure that the sliding detection bar 701 is in close contact with the bottom side of the base plate 6.

[0031] More specifically, in this embodiment of the invention, a driving ring groove 708 is annularly inclinedly formed on the transition rotating column 707, and a driving hemispherical block 709 is installed on the inner wall of the driving sleeve 712. The driving hemispherical block 709 is movably installed in the driving ring groove 708. It should be noted that, in this embodiment of the invention, when the transition rotating column 707 rotates, the driving ring groove 708 drives the driving hemispherical block 709 to move, causing the driving hemispherical block 709 to drive the driving sleeve 712 to move. The movement of the driving sleeve 712 drives the transverse sliding frame 704 to move, causing the transverse sliding frame 704 to slide on the main mounting plate 702 and the auxiliary mounting plate 703. At the same time, when the transition rotating column 707 rotates one revolution, the transverse sliding frame 704 reciprocates once. The movement of the transverse sliding frame 704 drives the sliding detection strip 701 to move, causing the sliding detection strip 701 to perform sliding detection on the bottom side of the base plate 6.

[0032] More specifically, in this embodiment of the invention, both the transition rotating column 707 and the transmission shaft 4 are equipped with transmission pulleys 710, and a first belt 711 is sleeved on the two transmission pulleys 710. It should be noted that, in this embodiment of the invention, when the transmission shaft 4 rotates, it drives the transmission pulleys 710 to rotate, so that the transmission pulleys 710 drive the other transmission pulley 710 to rotate through the first belt 711, thereby causing the transition rotating column 707 to rotate.

[0033] Please continue to refer to the instruction manual appendix. Figures 2-3 and Figures 6-9 Furthermore, the scraper conveyor for coal mines provided in this embodiment of the invention includes an automatic bottom plate switching mechanism 8 that further includes two lowering unlocking frames 806. Two limiting sliding holes 805 are provided on the sliding detection bar 701, and the two lowering unlocking frames 806 are respectively slidably installed in the two limiting sliding holes 805. Furthermore, the bottom side of the switching carriage 802 is provided with multiple switching slots 808, and each of the two lowering unlocking frames 806 is equipped with a switching rod 807, which is inserted into the corresponding two switching slots 808. It should be noted that, in this embodiment of the invention, when the deformation of the bottom side of the base plate 6 is too large, the sliding detection bar 701 continuously moves downward. The downward movement of the sliding detection bar 701 causes it to move vertically within the two lifting slides 809 via the two lifting slide plates 810, which in turn causes the two supporting springs 811 to be stressed. At the same time, the movement of the sliding detection bar 701 causes the lowering unlocking frame 806 to move downward, which in turn causes the lowering unlocking frame 806 to disengage the switching rod 807 from the switching slot 808, thereby achieving automatic unlocking of the switching carriage 802.

[0034] More specifically, in this embodiment of the invention, both the main mounting plate 702 and the auxiliary mounting plate 703 are provided with lifting grooves 809, and both lowering unlocking frames 806 are equipped with lifting slide plates 810. The two lifting slide plates 810 are slidably installed in the two lifting grooves 809 respectively. A support spring 811 is installed on the bottom inner wall of the lifting groove 809, and the support spring 811 is installed on the lifting slide plate 810. It should be noted that in this embodiment of the invention, when the bottom deformation of the base plate 6 is too large, the sliding detection strip 701 is squeezed by the base plate 6 and continuously moves downward during movement. The downward movement of the sliding detection strip 701 is transmitted vertically within the two lifting grooves 809 by the two lifting slide plates 810, thereby causing the two support springs 811 to be stressed, thus realizing the vertical movement of the lowering unlocking frame 806.

[0035] More specifically, in this embodiment of the invention, a switching spring 803 is installed on the switching bracket 804. The switching spring 803 is mounted on the mounting sleeve 801. The contraction of the switching spring 803 drives the switching bracket 804 to move, thereby moving the base plate 6. It should be noted that, in this embodiment of the invention, when the switching slide 802 is unlocked, the switching spring 803 contracts, causing the switching bracket 804 to move, thereby moving the base plate 6 and achieving the switching of the base plate 6.

[0036] Please refer to the instruction manual attached. Figure 2 and Figure 10 Furthermore, in this embodiment of the invention, a scraper conveyor for coal mines includes a feed holding mechanism 9 that further comprises an auxiliary pulley 908 mounted on a driven shaft 906. Additionally, a drive pulley 910 is mounted on the transmission shaft 4, and a second belt 909 is sleeved on both the auxiliary pulley 908 and the drive pulley 910. It should be noted that in this embodiment, when the transmission shaft 4 rotates, it drives the drive pulley 910 to rotate, causing the drive pulley 910 to drive the auxiliary pulley 908 to rotate via the second belt 909, which in turn drives the driven shaft 906 to rotate. The rotation of the driven shaft 906 drives the cam 907 to rotate, causing the cam 907 to push against the feed screen plate 901 and move upwards as it rotates. As the cam 907 continues to rotate, its protruding side moves away from the feed screen plate 901, causing the feed screen plate 901 to move downwards rapidly, thus achieving vertical up-and-down movement of the feed screen plate 901.

[0037] More specifically, in this embodiment of the invention, a limiting mounting bracket 902 is installed on both inner walls of the feed box 2, and two pull-down sleeves 903 are installed on the feed screen plate 901. The two limiting mounting brackets 902 are respectively movably installed in the two pull-down sleeves 903. Furthermore, a vibration spring 904 is installed on the bottom side of the limiting mounting bracket 902, and the vibration spring 904 is mounted on the inner wall of the pull-down sleeve 903. It should be noted that, in this embodiment of the invention, when the feed screen plate 901 moves upward, the two pull-down sleeves 903 move on the two limiting mounting brackets 902, causing the two vibration springs 904 to be stressed; when the feed screen plate 901 moves downward, it is blocked by the vibration frame 905, causing the feed screen plate 901 to vibrate, which can both screen the feed and prevent the feed screen plate 901 from clogging.

[0038] Please continue to refer to the instruction manual appendix. Figure 2 and Figure 10 More specifically, in this embodiment of the invention, a vibrating frame 905 is installed on the inner wall of the feed box 2. The feed screen plate 901 moves downward and contacts the vibrating frame 905, vibrating the feed screen plate 901. It should be noted that in this embodiment of the invention, when the feed screen plate 901 moves downward and contacts the vibrating frame 905, the feed screen plate 901 is vibrated by the vibrating frame 905, thereby allowing the feed material on the feed screen plate 901 to pass through quickly and maintain continuous feeding.

[0039] In summary, the working principle of the scraper conveyor for coal mines provided in this embodiment of the invention is as follows: When the scraper conveyor body 1 is started, the drive motor 5 drives the transmission shaft 4 to operate. At this time, the raw material enters the feed box 2 for conveying and is output through the discharge port 3. During this process, the raw material is blocked and screened by the feed screen plate 901. At the same time, when the transmission shaft 4 rotates, it drives the drive pulley 910 to rotate, which drives the auxiliary pulley 908 to rotate through the second belt 909, and then drives the driven shaft 906 to rotate. The rotation of the driven shaft 906 drives the cam 907 to rotate, so that when the cam 907 rotates, it pushes the feed screen plate 901 upward. The upward movement of the feed screen plate 901 moves on the two limiting mounting brackets 902 through the two pull-down sleeves 903, and causes the two vibration springs 904 to be stressed. It should be noted that when the cam 907 rotates continuously, the protruding side of the cam 907 moves away from the feed screen plate 901. Then, under the rebound force of the two vibration springs 904, the feed screen plate 901 is pushed to move down quickly and is blocked by the vibration frame 905. This causes the feed screen plate 901 to vibrate, which can not only screen the feed but also prevent the feed screen plate 901 from clogging, helping the raw materials to pass through the feed screen plate 901 better and achieving the purpose of maintaining uninterrupted feeding. Furthermore, when the drive shaft 4 rotates, it drives the drive pulley 710 to rotate, which in turn drives the other drive pulley 710 to rotate via the first belt 711. This causes the transition rotating column 707 to rotate, and the transition rotating column 707 rotates on the two rotating supports 706. The rotation of the transition rotating column 707 drives the drive hemispherical block 709 to move via the drive ring groove 708, which in turn drives the drive sleeve 712 to move. The movement of the drive sleeve 712 drives the transverse sliding frame 704 to move, allowing the transverse sliding frame 704 to slide on the main mounting plate 702 and the auxiliary mounting plate 703. Furthermore, when the transfer rotating column 707 rotates one revolution, the transverse sliding frame 704 reciprocates once. The movement of the transverse sliding frame 704 drives the sliding detection strip 701 to move, so that the sliding detection strip 701 performs sliding detection on the bottom side of the base plate 6. If the bottom side of the base plate 6 is deformed, the sliding detection strip 701 is squeezed and moves up and down on the transverse sliding frame 704, and the multiple clamping springs 705 retract, thereby realizing active detection of the base plate 6. Furthermore, if the deformation of the bottom side of the base plate 6 is too large, the sliding detection bar 701 will continue to move downward. The downward movement of the sliding detection bar 701 will cause it to move vertically within the two lifting slides 809 via the two lifting slide plates 810, and will cause the two support springs 811 to be stressed. At the same time, the movement of the sliding detection bar 701 will cause the lowering unlocking frame 806 to move downward, causing the lowering unlocking frame 806 to drive the switching rod 807 to disengage from the switching slot 808. At this time, under the pull force of the switching spring 803, the switching bracket 804 will drive multiple base plates 6 to move, thereby causing one base plate 6 to disengage from the scraper conveyor body 1 and causing another base plate 6 to move to the bottom side of the scraper conveyor body 1. Meanwhile, the switching rod 807 will be inserted into the corresponding switching slot 808, thereby realizing the automatic switching of the base plate 6, so that the scraper conveyor body 1 can operate continuously and ensure conveying efficiency.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A scraper conveyor for coal mines, characterized in that, It includes a scraper conveyor body, on which a feed box, a discharge port and a drive motor are installed. A drive shaft is installed inside the scraper conveyor body. The drive motor is connected to the drive shaft. Multiple base plates are slidably installed on the bottom side of the scraper conveyor body. The multiple base plates are movably connected. It also includes a bottom plate flatness detection mechanism, which is installed on the scraper conveyor body and is used to detect the flatness of the bottom plate. The bottom plate flatness detection mechanism includes a sliding detection bar. A main mounting plate and an auxiliary mounting plate are respectively installed on the scraper conveyor body and the discharge port. A transverse sliding frame is slidably installed on the main mounting plate and the auxiliary mounting plate, and the sliding detection bar is movably installed on the transverse sliding frame. An automatic bottom plate switching mechanism is installed on the scraper conveyor body. Multiple bottom plates are movably installed on the automatic bottom plate switching mechanism, which is used to switch between the multiple bottom plates. The automatic bottom plate switching mechanism includes two mounting sleeves, which are respectively installed on the scraper conveyor body and the discharge port. A switching slide is movably installed inside each of the two mounting sleeves. Two switching brackets are installed on one of the bottom plates away from the scraper conveyor body, and the two switching slides are respectively installed on the two switching brackets. It also includes a feed holding mechanism, which is installed on the feed box and is used to screen the feed. The feed holding mechanism includes a feed screen plate, which is installed in the feed box. A driven shaft is rotatably installed on the feed box, and a cam is installed on the driven shaft. The cam rotates to drive the feed screen plate to move.

2. A scraper conveyor for coal mines according to claim 1, characterized in that, The base plate flatness detection mechanism also includes a transfer rotating column. Two rotating brackets are installed on one side of the scraper conveyor body, and the transfer rotating column is rotatably installed in the two rotating brackets. A drive sleeve is installed on the transverse sliding frame, and the drive sleeve is movably sleeved on the adapter rotating column. Multiple clamping springs are installed between the transverse sliding frame and the sliding detection bar.

3. A scraper conveyor for coal mines according to claim 2, characterized in that, The rotating column of the adapter is provided with a drive ring groove at an angle, and a drive hemisphere is installed on the inner wall of the drive sleeve. The drive hemisphere is movably installed in the drive ring groove.

4. A scraper conveyor for coal mines according to claim 3, characterized in that, Both the rotating column and the drive shaft are equipped with drive pulleys, and a first belt is sleeved on the two drive pulleys.

5. A scraper conveyor for coal mines according to claim 1, characterized in that, The automatic switching mechanism for the base plate also includes two descent unlocking frames. The sliding detection bar has two limiting sliding holes, and the two descent unlocking frames are slidably installed in the two limiting sliding holes respectively. The bottom side of the switching carriage is provided with multiple switching slots, and the two lowering unlocking frames are each equipped with a switching rod, which is inserted into the two switching slots at the corresponding positions.

6. A scraper conveyor for coal mines according to claim 5, characterized in that, Both the main mounting plate and the auxiliary mounting plate are provided with lifting slide grooves, and both of the two lowering unlocking frames are equipped with lifting slide plates. The two lifting slide plates are slidably installed in the two lifting slide grooves respectively. A support spring is installed on the bottom inner wall of the lifting slide, and the support spring is installed on the lifting slide plate.

7. A scraper conveyor for coal mines according to claim 6, characterized in that, A switching spring is installed on the switching bracket, and the switching spring is mounted on the mounting sleeve. The contraction of the switching spring drives the switching bracket to move, thereby moving the base plate.

8. A scraper conveyor for coal mines according to claim 1, characterized in that, The feed holding mechanism further includes an auxiliary pulley, which is mounted on the driven shaft; A drive pulley is mounted on the drive shaft, and a second belt is sleeved on the auxiliary pulley and the drive pulley.

9. A scraper conveyor for coal mines according to claim 8, characterized in that, The inner walls on both sides of the feed box are equipped with limiting mounting brackets, and the feed screen plate is equipped with two pull-down sleeves. The two limiting mounting brackets are respectively movably installed in the two pull-down sleeves. A vibration spring is installed on the bottom side of the limiting mounting bracket, and the vibration spring is installed on the inner wall of the pull-down sleeve.

10. A scraper conveyor for coal mines according to claim 9, characterized in that, A vibrating frame is installed on the inner wall of the feed box. The feed screen plate moves down and contacts the vibrating frame to vibrate the feed screen plate.

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