A stone coal collecting device

Abstract

The application provides a stone coal collecting device. It relates to the technical field of auxiliary equipment for thermal power generation. The stone coal collecting device comprises a spiral conveyor, a supporting table, a vibrating screen box and two material receiving vehicles. A feeding pipe and a discharging pipe are fixedly installed on the spiral conveyor. The vibrating screen box is located below the spiral conveyor. The supporting table is located below the vibrating screen box. The two material receiving vehicles are both located below the supporting table. The lower half of the vibrating screen box is conical. The spiral conveyor is fixedly connected with the supporting table through four supporting rods. A screen plate is arranged in the vibrating screen box. A feeding corrugated pipe is fixedly installed on the top of the vibrating screen box. The top end of the feeding corrugated pipe is fixedly connected with the discharging pipe through a flange. The application can effectively prevent dust leakage, greatly improve the working environment, and recycle the mixed raw coal particles in the stone coal, thereby improving the resource utilization rate.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for thermal power generation, specifically to a stone and coal collection device. Background Technology

[0002] In thermal power plants, medium-speed coal mills are widely used in generator units of 350,000 kilowatts and above. When grinding suitable coal types such as bituminous coal and lean coal, they have advantages such as low metal consumption, low investment, low coal grinding power consumption, low metal wear and low noise. However, during the operation of medium-speed coal mills, impurities with high hardness such as gangue and pyrite in raw coal cannot be fully ground, and will form stone coal, which will be discharged through the discharge port of the coal mill base by the scraper.

[0003] Traditional stone and coal collection devices mostly adopt open or semi-open structures, which have significant drawbacks in collecting and discharging stone and coal: First, after the stone and coal are discharged, they are transported manually by carts or tractors, which easily generates a large amount of dust, seriously polluting the on-site working environment and threatening the health of workers; Second, the stone and coal usually contain some unground raw coal particles, which are often treated as waste along with impurities such as gangue, resulting in a waste of raw coal resources.

[0004] Therefore, it is necessary to provide a new stone and coal collection device to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a stone coal collection device that can effectively prevent dust leakage, significantly improve the working environment, and recover raw coal particles mixed in with the stone coal, thereby improving resource utilization.

[0006] To solve the above-mentioned technical problems, the present invention provides a stone and coal collecting device comprising: a screw conveyor, a support platform, a vibrating screen housing, and two receiving carts. The screw conveyor is fixedly equipped with an inlet pipe and a outlet pipe. The vibrating screen housing is located below the screw conveyor, the support platform is located below the vibrating screen housing, and both receiving carts are located below the support platform. The lower half of the vibrating screen housing is conical. The screw conveyor is fixedly connected to the support platform via four support rods. A screen plate is provided inside the vibrating screen housing. An inlet corrugated pipe is fixedly installed on the top of the vibrating screen housing, and the top end of the inlet corrugated pipe is fixedly connected to the outlet pipe via a flange. A first outlet corrugated pipe is fixedly installed at the bottom of the conical portion of the vibrating screen housing. A outlet is opened on one side of the vibrating screen housing, and a stone and coal discharge box is fixedly installed on the side of the vibrating screen housing with the outlet. The support platform... A top-mounted adapter is fixedly installed, and a rotating platform is hinged to the top of the adapter. The first discharge corrugated pipe passes through the rotating platform but does not contact it. A rotating lifting assembly is provided on the top of the support platform, and the rotating lifting assembly is connected to the rotating platform, enabling the rotating platform to rotate with the vibrating screen box to an inclined state for easy material discharge. A vibrating screening assembly is provided on the rotating platform, and the vibrating screening assembly is connected to the vibrating screen box. A stone and coal receiving pipe and a raw coal particle receiving pipe are fixedly installed on the support platform. The bottom end of the first discharge corrugated pipe is connected to the raw coal particle receiving pipe through a flange. A rectangular connecting sleeve is fitted at the bottom of both the stone and coal receiving pipe and the raw coal particle receiving pipe. A receiving corrugated pipe is fixedly installed on the top of both receiving carts. The bottom ends of the two rectangular connecting sleeves are conical, and the conical bottom ends of the two rectangular connecting sleeves extend into the two receiving corrugated pipes respectively.

[0007] Furthermore, the screen plate is fixedly installed in the vibrating screen box by bolts, and one side of the vibrating screen box is provided with an opening, and an inspection door is sealed on the open side of the vibrating screen box.

[0008] Furthermore, the vibrating screening assembly includes an impact arm, which is fixedly installed on the outer wall of the vibrating screen housing away from the stone and coal discharge box. A rotary motor is fixedly installed on the top of the rotary table, and a cam is fixedly installed on the output shaft of the rotary motor. The protruding end of the cam is adapted to the impact arm. Four lifting rods are slidably installed on the rotary table. The top ends of the four lifting rods are fixedly connected to the vibrating screen housing. Spring retaining rings are fixedly sleeved on each of the four lifting rods. Return springs are sleeved on each of the four lifting rods. The top ends of the four return springs are fixedly connected to the four spring retaining rings, and the bottom ends of the four return springs are fixedly connected to the rotary table. Four shock-absorbing pads are fixedly installed on the top of the support platform. Expanding panels are fixedly installed on the bottom ends of the four lifting rods, and the four expanding panels abut against the four shock-absorbing pads.

[0009] Furthermore, the rotary lifting assembly includes a hydraulic cylinder, which is fixedly installed on the top of the support platform. Two limiting slide rods are fixedly installed on the bottom of the rotary platform, and the same connecting slider is slidably installed on the two limiting slide rods. The output shaft of the hydraulic cylinder is hinged to the connecting slider.

[0010] Furthermore, the side of the stone and coal discharge box that is in contact with the vibrating screen box is provided with an opening, which surrounds the discharge port. The lower half of the stone and coal discharge box is funnel-shaped, and a stone and coal discharge pipe is fixedly installed at the bottom of the funnel-shaped part of the stone and coal discharge box. A second discharge corrugated pipe is fixedly installed at the bottom end of the stone and coal discharge pipe. The bottom end of the second discharge corrugated pipe is fixedly connected to the stone and coal inlet pipe through a flange. A sealing plug is provided inside the discharge port, and a sealing plate is provided inside the stone and coal discharge box. The blocking plate is fixedly connected to the sealing plug. A rodless cylinder is fixedly installed on the outer wall of the stone and coal discharge box away from the vibrating screen box. A connecting plate is fixedly installed on the slider of the rodless cylinder. The connecting plate is in contact with the outer wall of the stone and coal discharge box. A connecting rod is fixedly installed on one side of the connecting plate. One end of the connecting rod extends into the stone and coal discharge box and is fixedly connected to the blocking plate. The connecting rod is slidably connected to one side of the stone and coal discharge box. A sealing ring is fixedly installed on the side of the blocking plate away from the sealing plug.

[0011] Furthermore, each of the two connecting bellows is equipped with a dome valve, each of the two rectangular connecting sleeves is fixedly fitted with an installation sleeve, and each of the two installation sleeves is fixedly fitted with a sealing sleeve at its bottom. Each of the two connecting bellows is fixedly fitted with an abutment ring, the top of which abuts against the two sealing sleeves respectively. Each of the two rectangular connecting sleeves has a first quadrilateral connecting sheet metal fixedly installed at its top. Each of the stone / coal connecting pipe and the raw coal particle connecting pipe has a second quadrilateral connecting sheet metal fixedly fitted. Each of the two first quadrilateral connecting sheets is fixedly connected to its corresponding second quadrilateral connecting sheet metal by bolts, and a first sealing ring is provided between the first and second quadrilateral connecting sheets. The two rectangular connecting sleeves... A connecting shell is fixedly installed on the outer wall of each of the two connecting shells on the side away from each other. A first single-shaft cylinder is fixedly installed on the outer wall of each of the two connecting shells on the side away from each other. The output shafts of the two first single-shaft cylinders extend into the corresponding connecting shells, and a sealing plate is fixedly installed on the output shaft of each of the two first single-shaft cylinders. The side of the two sealing plates that is close to each other extends into the two rectangular connecting sleeves, and a shuttle opening is opened on the side of the two rectangular connecting sleeves that is far from each other. The two sealing plates pass through the two shuttle openings, and a sealing gasket is fixedly installed on the top of each of the two sealing plates. The top of the two sealing gaskets abuts against the bottom of the stone and coal receiving pipe and the raw coal particle receiving pipe, respectively. The shuttle openings allow the sealing gaskets to move laterally.

[0012] Furthermore, two partition plates are fixedly installed at the bottom of the support platform. The sides of the two receiving carts that are close to each other are respectively attached to the two sides of the partition plates. Two back-connecting plates are fixedly installed on both sides of the partition plates. A dual-axis cylinder is fixedly installed on each of the four back-connecting plates. The output shafts of the four dual-axis cylinders pass through the corresponding back-connecting plates and are slidably connected to the corresponding back-connecting plates. A push-center plate is fixedly installed on the output shaft of each of the four dual-axis cylinders. The four push-center plates are paired and used in conjunction. A ball bearing is embedded on the side of each of the four push-center plates that is close to the receiving cart. The ball bearings on the four push-center plates are in contact with the corresponding receiving cart. A second single-axis cylinder is fixedly installed on the top of each of the two receiving carts. The output shafts of the two second single-axis cylinders are respectively fixedly connected to the top outer wall of the two receiving bellows. A material level sensor is fixedly installed on the top of each of the two receiving carts.

[0013] Furthermore, an abutment folding strip is fixedly installed at the bottom of the impact support arm. The abutment folding strip passes through the rotary table and is slidably connected to the rotary table. A third single-axis cylinder is fixedly installed at the top of the rotary table. The output shaft of the third single-axis cylinder passes through the rotary table and is slidably connected to it. A limit block is fixedly installed on the output shaft of the third single-axis cylinder. The limit block is adapted to the abutment folding strip. The limit block abuts against the abutment folding strip by extending the output shaft of the third single-axis cylinder, thereby preventing the vibrating screen box from shaking randomly when not in use.

[0014] Furthermore, a second sealing ring is provided at the top of the feed pipe and the bottom of the discharge pipe, the top of the feed corrugated pipe abuts against the corresponding second sealing ring, the top of the stone and coal receiving pipe and the raw coal particle receiving pipe are provided with a third sealing ring, and the bottom of the first discharge corrugated pipe and the second discharge corrugated pipe abuts against the two third sealing rings respectively.

[0015] Furthermore, a rectangular placement ring is fixedly installed inside the vibrating screen box, and the bottom of the screen plate contacts the rectangular placement ring. A pull-out opening is provided on the side of the vibrating screen box away from the stone and coal discharge box. A connecting strip is provided inside the pull-out opening, and the connecting strip fits against the inner wall of the pull-out opening. One side of the connecting strip is fixedly connected to the screen plate, and the other side of the connecting strip extends to the outside of the vibrating screen box and is fixedly installed with a pull-out panel. A rectangular fourth sealing ring is provided between the pull-out panel and the vibrating screen box. A positioning arm is rotatably installed on the side of the pull-out panel away from the vibrating screen box. A snap-fit ​​groove is provided on the side of the positioning arm away from the vibrating screen box, and one side of the positioning arm is beveled. A positioning boss is fixedly installed on the side, and a positioning socket is opened on the positioning boss. The positioning arm passes through the positioning socket and fits against the inner wall of the positioning socket. A hollow bracket is fixedly installed on the side of the positioning boss away from the vibrating screen box. A wedge-shaped insert block is provided in the hollow bracket. The inclined surface of the positioning arm is adapted to the insert block. One side of the insert block extends into the snap-fit ​​groove to form an insertion effect, and the insert block is slidably connected to one side of the positioning boss. A linkage rod is provided in the hollow bracket. One end of the linkage rod is fixedly connected to the insert block, and the other end extends to the outside of the hollow bracket and is slidably connected to one side of the hollow bracket. A tension spring is sleeved on the linkage rod. One end of the tension spring is fixedly connected to the insert block, and the other end is fixedly connected to one side wall of the hollow bracket.

[0016] Compared with related technologies, the stone and coal collection device provided by the present invention has the following beneficial effects: I. This invention can effectively separate raw coal particles mixed in with stone coal through the screening action of the sieve plate, thereby avoiding resource waste and improving the utilization rate of coal resources. Second, the present invention adopts a multi-seal design including a feed bellows, an discharge bellows, a sealing plug, a sealing plate and a dome valve, which realizes full-process sealing from feeding and screening to unloading, completely solves the problem of dust flying in traditional open collection devices, and significantly improves the working environment. Third, by controlling the dome valve and the first single-shaft cylinder, this invention can completely isolate the internal dust of the vibrating screen box and the stone and coal discharge box, as well as the internal dust of the receiving car, when changing the receiving car, thereby further improving the working environment and ensuring the health of the workers. Attached Figure Description

[0017] Figure 1 Front view schematic diagram of the first embodiment of the stone and coal collecting device provided by the present invention Figure I ; Figure 2 Front view schematic diagram of the first embodiment of the stone and coal collecting device provided by the present invention Figure II ; Figure 3 A frontal plan view of the first embodiment of the stone and coal collection device provided by the present invention; Figure 4 A schematic diagram showing the disassembled state of the support platform, receiving car, and rectangular connecting sleeve in the first embodiment of the stone and coal collection device provided by the present invention; Figure 5 A schematic diagram of the connection structure between the bi-shaft cylinder and the push plate in the first embodiment of the stone and coal collection device provided by the present invention; Figure 6 A schematic diagram of the disassembled state of the vibrating screen box and the stone and coal discharge box in the first embodiment of the stone and coal collection device provided by the present invention; Figure 7 A schematic diagram of the connection structure between the vibrating screen box and the lifting rod in the first embodiment of the stone and coal collection device provided by the present invention; Figure 8 A cross-sectional view of the vibrating screen box in the first embodiment of the stone and coal collection device provided by the present invention; Figure 9 A cross-sectional view of the stone and coal discharge box in the first embodiment of the stone and coal collection device provided by the present invention; Figure 10 A schematic diagram of the assembly of the corrugated pipe, dome valve and rectangular connecting sleeve in the first embodiment of the stone and coal collecting device provided by the present invention; Figure 11 A schematic diagram of the assembly cross-sectional structure of the rectangular connecting sleeve, the stone and coal receiving pipe, and the raw coal particle receiving pipe in the first embodiment of the stone and coal collecting device provided by the present invention. Figure 12 for Figure 11 The diagram shows an enlarged view of part A. Figure 13 A schematic diagram of the structure of the stone and coal receiving pipe and the raw coal particle receiving pipe in the first embodiment of the stone and coal collecting device provided by the present invention; Figure 14 A schematic diagram of the connection structure between the rectangular connecting sleeve and the connecting shell in the first embodiment of the stone and coal collecting device provided by the present invention; Figure 15 A cross-sectional view of the rectangular connecting sleeve and the connecting shell in the first embodiment of the stone and coal collecting device provided by the present invention; Figure 16 This is a front view schematic diagram of a second embodiment of the stone and coal collecting device provided by the present invention; Figure 17 A schematic diagram of the assembly of the pull-out panel and the vibrating screen box in the second embodiment of the stone and coal collection device provided by the present invention; Figure 18 A schematic diagram of the opening of the pull-out port in the second embodiment of the stone and coal collection device provided by the present invention; Figure 19 A cross-sectional view of the vibrating screen box in the second embodiment of the stone and coal collection device provided by the present invention; Figure 20 A schematic diagram of the disassembled state of the positioning arm and positioning boss in the second embodiment of the stone and coal collecting device provided by the present invention; Figure 21 A schematic diagram of the opening of the clamping groove in the second embodiment of the stone and coal collecting device provided by the present invention; Figure 22 A schematic diagram of the internal structure of the hollow support in the second embodiment of the stone and coal collection device provided by the present invention.

[0018] Numbered in the diagram: 1. Screw conveyor; 101. Feed pipe; 102. Discharge pipe; 2. Vibrating screen housing; 201. Screen plate; 202. Discharge port; 203. Feed corrugated pipe; 204. First discharge corrugated pipe; 3. Stone and coal discharge box; 301. Sealing plate; 302. Sealing plug; 303. Rodless cylinder; 304. Connecting plate; 305. Connecting rod; 306. Stone and coal discharge pipe; 307. Second discharge corrugated pipe; 4. Support platform; 5. Transfer seat; 6. Rotary table; 7. Connecting slider; 8. Hydraulic cylinder; 9. Impact arm; 901. Rotary motor; 902. Cam; 903. Lifting rod; 904. Spring retaining ring; 905. Return spring; 906. Shock absorber; 10. Divider plate; 11. Stone and coal receiving pipe; 12. Original 13. Coal particle receiving pipe; 1301. Receiving trolley; 1302. Receiving corrugated pipe; 1303. Dome valve; 1304. Rectangular connecting sleeve; 1305. Connecting shell; 1306. First single-axis cylinder; 1307. Sealing plate; 14. Second single-axis cylinder; 15. Material level sensor; 16. Back plate; 1601. Dual-axis cylinder; 1602. Push plate; 17. Abutting folding strip; 18. Third single-axis cylinder; 19. Limiting block; 20. Rectangular placement ring; 21. Pull-out port; 22. Connecting strip; 23. Pull-out panel; 24. Positioning insert arm; 25. Snap-fit ​​groove; 26. Positioning boss; 2601. Positioning socket; 2602. Hollow bracket; 2603. Linkage rod; 2604. Inserting block; 2605. Tension spring. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] First embodiment: Please refer to the following: Figures 1-15The stone and coal collection device includes: a screw conveyor 1, a support platform 4, a vibrating screen housing 2, and two receiving carts 13. The screw conveyor 1 is a common material conveying device on the market and will not be described in detail here. The receiving carts 13 have opening and closing doors on one side for convenient centralized discharge. The screw conveyor 1 is fixedly connected to the support platform 4 by four support rods. An inlet pipe 101 and a discharge pipe 102 are fixed on the screw conveyor 1. The vibrating screen housing 2 is located below the screw conveyor 1, the support platform 4 is located below the vibrating screen housing 2, and both receiving carts 13 are located below the support platform 4. The lower half of the vibrating screen housing 2 is tapered. The vibrating screen housing 2 is bolted to a screen plate 201 for screening raw coal particles. The front of the vibrating screen housing 2 has an opening, and a maintenance door is sealed on this opening side for easy access to the internal components. A feed bellows 203 is fixed to the top of the vibrating screen housing 2, and its top end is fixedly connected to the discharge pipe 102 via a flange. A first discharge bellows 204 is fixed to the bottom of the conical section of the vibrating screen housing 2. A discharge port 202 is opened on one side of the vibrating screen housing 2 for discharging gravel. A screen plate 201 is fixed to the side of the vibrating screen housing 2 with the discharge port 202. A stone and coal discharge box 3 is provided. The lower half of the stone and coal discharge box 3 is funnel-shaped, and a stone and coal discharge pipe 306 is fixed to the bottom of the funnel-shaped part. The side of the stone and coal discharge box 3 that is in contact with the vibrating screen box 2 is provided with an opening, and the opening surrounds the discharge port 202 to ensure that the stone and coal can be completely discharged. A transition seat 5 is fixed on the top of the support platform 4, and a rotating platform 6 is hinged to the top of the transition seat 5. An avoidance hole is provided on the rotating platform 6. The first discharge corrugated pipe 204 is provided through the avoidance hole and does not contact the inner wall of the hole, so that the rotating platform 6 will not interfere with the movement of the first discharge corrugated pipe 204. A rotary lifting assembly is provided, which is connected to the rotary table 6. The rotary table 6 can rotate the vibrating screen box 2 to an inclined state to facilitate material discharge. The rotary lifting assembly includes a hydraulic cylinder 8 fixed to the top of the support platform 4. Two limit slide rods are fixed to the bottom of the rotary table 6. The same connecting slider 7 is slidably installed on the two limit slide rods. The output shaft of the hydraulic cylinder 8 is hinged to the connecting slider 7. The rotary table 6 can be rotated and tilted by the extension and retraction of the output shaft of the hydraulic cylinder 8 to ensure the smooth discharge of stones and coal. A vibrating screening assembly is provided on the rotary table 6, which is connected to the vibrating screen box 2.Furthermore, the vibrating screen assembly includes an impact support arm 9 fixed to the outer wall of the vibrating screen housing 2 on the side away from the stone and coal discharge box 3, and a rotary motor 901 fixed to the top of the rotary table 6. A cam 902 is fixed on the output shaft of the rotary motor 901, and the protruding end of the cam 902 is adapted to the impact support arm 9. When the rotary motor 901 is running, the cam 902 can repeatedly impact the impact support arm 9, thereby causing the vibrating screen housing 2 to vibrate up and down, achieving the screening effect. Four lifting rods 903 are slidably installed on the rotary table 6, and the top ends of the four lifting rods 903 are all connected to the vibrating screen housing 2. The four lifting rods 903 are fixedly connected, each fitted with a spring retaining ring 904 and a return spring 905. The top ends of the return springs 905 are fixedly connected to the four spring retaining rings 904, and the bottom ends of the return springs 905 are fixedly connected to the rotating table 6. Four shock-absorbing pads 906 are fixedly mounted on the top of the support platform 4, and expanded panels are fixedly mounted on the bottom ends of the four lifting rods 903. These expanded panels abut against the four shock-absorbing pads 906. Through the reset function of the return springs 905, the vibrating screen box 2 smoothly achieves up-and-down vibration.

[0021] In this embodiment, to separate the collection of gravel and raw coal particles, a gravel receiving pipe 11 and a raw coal particle receiving pipe 12 are fixed on the support platform 4. The bottom end of the first discharge corrugated pipe 204 is connected to the raw coal particle receiving pipe 12 via a flange. Rectangular connecting sleeves 1303 are fitted onto the bottom of both the gravel receiving pipe 11 and the raw coal particle receiving pipe 12. Receiving corrugated pipes 1301 are fixed to the top of both receiving carts 13. The bottom ends of both rectangular connecting sleeves 1303 are conical, and the conical bottom ends of the two rectangular connecting sleeves 1303 extend into the two receiving corrugated pipes 1301 respectively. Furthermore, dome valves 1302 are provided on both receiving corrugated pipes 1301, and fixed to both rectangular connecting sleeves 1303. An installation sleeve is provided, and a sealing sleeve is fixed to the bottom of each of the two installation sleeves. An abutment ring is fixedly fitted onto each of the two connecting bellows 1301, with the top of each abutting ring abutting against the two sealing sleeves respectively. A first quadrilateral connecting sheet metal is fixed to the top of each of the two rectangular connecting sleeves 1303. A second quadrilateral connecting sheet metal is fixedly fitted onto each of the stone / coal connecting pipe 11 and the raw coal particle connecting pipe 12. Both first quadrilateral connecting sheets are fixedly connected to their corresponding second quadrilateral connecting sheets by bolts, and a first sealing ring is provided between the first and second quadrilateral connecting sheets. Through the sealing sleeves and the first sealing ring, the stone / coal connecting pipe 11 and the raw coal particle connecting pipe 12 are connected to their respective rectangular connecting sleeves 1303. To ensure sealing performance during the assembly of the connecting bellows 1301, a connecting housing 1304 is fixed to the outer wall of each of the two rectangular connecting sleeves 1303 on the side away from each other. A first single-shaft cylinder 1305 is fixed to the outer wall of each of the two connecting housings 1304 on the side away from each other. The output shafts of the two first single-shaft cylinders 1305 extend into the corresponding connecting housings 1304, and a sealing plate 1306 is fixed to the output shaft of each of the two first single-shaft cylinders 1305. The side of the two sealing plates 1306 closest to each other extends into the two rectangular connecting sleeves 1303. A shuttle opening is provided on the side of each of the two rectangular connecting sleeves 1303 on the side away from each other. The two sealing plates 1306 pass through the two shuttle openings respectively. Each of the 1306 is fixed with a sealing gasket 1307. The tops of the two sealing gaskets 1307 respectively abut against the bottoms of the stone and coal receiving pipe 11 and the raw coal particle receiving pipe 12. The shuttle port allows the sealing gasket 1307 to move laterally. When the sealing gasket 1307 is not in contact with the bottoms of the stone and coal receiving pipe 11 and the raw coal particle receiving pipe 12, its top end face should be slightly higher than the bottom end face of the stone and coal receiving pipe 11 and the raw coal particle receiving pipe 12. The sealing gasket 1307 has a rounded corner design on the side facing the stone and coal receiving pipe 11 and the raw coal particle receiving pipe 12, so as to ensure that the sealing gasket 1307 can undergo compression deformation when it moves to contact the bottoms of the stone and coal receiving pipe 11 and the raw coal particle receiving pipe 12, thereby enhancing the sealing effect.

[0022] In this embodiment, in order to smoothly discharge the stones and coal in the vibrating screen box 2 into the stone and coal discharge box 3, a second discharge corrugated pipe 307 is fixed at the bottom end of the stone and coal discharge pipe 306. The bottom end of the second discharge corrugated pipe 307 is fixedly connected to the stone and coal inlet pipe 11 through a flange, and a sealing plug 302 is provided in the discharge port 202. A sealing plate 301 is provided in the stone and coal discharge box 3, and the sealing plate 301 is fixedly connected to the sealing plug 302. A rodless cylinder 303 is fixed on the outer wall of the stone and coal discharge box 3 on the side away from the vibrating screen box 2. A connecting piece 304 is fixed on its own slider. The connecting piece 304 fits against the outer wall of the stone and coal discharge box 3 on one side, and a connecting rod 305 is fixed on one side of the connecting piece 304. One end of the connecting rod 305 extends into the stone and coal discharge box 3 and is fixedly connected to the sealing plate 301. The connecting rod 305 and the connecting rod 305 are fixed to the outer wall of the stone and coal discharge box 3. The stone and coal discharge box 3 is slidably connected on one side. A sealing ring is fixed on the side of the sealing plate 301 away from the sealing plug 302. When the rodless cylinder 303 is activated, the sealing plug 302 is pulled out from the discharge port 202, and the sealing ring on the sealing plate 301 is finally made to fit against the side wall of the stone and coal discharge box 3, thus providing a sealing effect at the sliding connection between the connecting rod 305 and the stone and coal discharge box 3. In addition, a second sealing ring is provided at the top of the feed pipe 101 and the bottom of the discharge pipe 102. The top of the feed bellows 203 abuts against the corresponding second sealing ring. A third sealing ring is provided at the top of the stone and coal receiving pipe 11 and the raw coal particle receiving pipe 12. The bottom ends of the first discharge bellows 204 and the second discharge bellows 307 abut against the two third sealing rings respectively, further ensuring the sealing performance of the entire device and minimizing dust generation.

[0023] In this embodiment, in order to align the receiving corrugated pipe 1301 directly below the rectangular connecting sleeve 1303, two partition plates 10 are fixed at the bottom of the support platform 4. The sides of the two receiving carts 13 that are close to each other are respectively attached to the two sides of the partition plates 10. Two back-connecting plates 16 are fixed on both sides of the partition plates 10. A dual-axis cylinder 1601 is fixed on each of the four back-connecting plates 16. The output shafts of the four dual-axis cylinders 1601 pass through the corresponding back-connecting plates 16 and are slidably connected to the corresponding back-connecting plates 16. A push-center plate 1602 is fixed on the output shafts of the four dual-axis cylinders 1601. The four push-center plates 1602 are paired and used in cooperation. The four push-center plates 1602 are close to the receiving carts 13. Each side is inlaid with ball bearings, and the ball bearings on the four push plates 1602 are in contact with the corresponding receiving carts 13. By operating the dual-axis cylinder 1601, the vertical center of the receiving cart 13 can be pushed to the vertical plane of the axis of the rectangular connecting sleeve 1303 using the push plates 1602. A second single-axis cylinder 14 is fixed on the top of each of the two receiving carts 13. The output shafts of the two second single-axis cylinders 14 are fixedly connected to the top outer wall of the two receiving bellows 1301 respectively. The extension of the output shaft of the second single-axis cylinder 14 can drive the receiving bellows 1301 to extend and retract up and down. In addition, a material level sensor 15 is fixed on the top of each of the two receiving carts 13, which can automatically sense the amount of material in the receiving cart 13.

[0024] In this embodiment, when the entire equipment is stopped and not in use, in order to prevent the vibrating screen box 2 from shaking significantly, an abutment folding strip 17 is fixed at the bottom of the impact support arm 9. The abutment folding strip 17 passes through the rotary table 6 and is slidably connected to the rotary table 6. A third single-axis cylinder 18 is fixed at the top of the rotary table 6, and its output shaft passes through the rotary table 6 and is slidably connected to it. A limit block 19 is fixed on the output shaft of the third single-axis cylinder 18. The limit block 19 is adapted to the abutment folding strip 17. By extending the output shaft of the third single-axis cylinder 18 to make the limit block 19 abut against the abutment folding strip 17, a movement restriction can be provided for the vibrating screen box 2.

[0025] In addition, when the rotary table 6 discharges the stones and coal in an inclined state, the vibrating screen box 2 can still vibrate under the operation of the rotary motor 901, thereby ensuring that the stones and coal fall completely and preventing the stones and coal from clogging in the stone and coal discharge box 3.

[0026] In this embodiment In the initial state, the output shafts of the two first single-shaft cylinders 1305, the two second single-shaft cylinders 14, and the four double-shaft cylinders 1601 are all extended, and the two dome valves 1302 are both closed.

[0027] When collecting gravel and coal, the feed pipe 101 is first connected to the discharge port of the coal mill. When the coal mill discharges gravel and coal (including mixed raw coal particles), the gravel and coal enter the screw conveyor 1 through the feed pipe 101 for stable conveying. The material is smoothly conveyed to the vibrating screen box 2 through the discharge pipe 102 and the feed corrugated pipe 203 and falls onto the screen plate 201. Furthermore, the setting of the feed corrugated pipe 203, the first discharge corrugated pipe 204 and the second discharge corrugated pipe 307 can be adapted to the subsequent vibration action of the vibrating screen box 2 to avoid material leakage. At the same time, the second sealing ring set at the top of the feed pipe 101 and the bottom of the discharge pipe 102 further enhances the sealing of the connection.

[0028] When the material falls onto the screen plate 201, the rotary motor 901 can be started, driving the cam 902 fixed on its output shaft to rotate. The protruding end of the cam 902 periodically impacts the impact support arm 9 fixed on the vibrating screen box 2. At the same time, the return springs 905 fixedly sleeved on the four lifting rods 903 also work together. Thus, under the combined action of the impact force of the cam 902 and the elastic force of the return springs 905, the lifting rods 903 drive the vibrating screen box 2 to vibrate up and down.

[0029] During vibration, the four damping pads 906 and the expansion panels at the bottom of the four lifting rods 903 come into contact with each other, effectively reducing the impact of vibration on the whole device; the screen plate 201 screens the material, and the smaller, insufficiently ground raw coal particles fall into the bottom of the vibrating screen box 2 through the screen holes of the screen plate 201, while the larger pure stone coal such as gangue and pyrite is intercepted by the screen plate 201.

[0030] While vibrating and screening, the dome valve 1302 corresponding to the first discharge bellows 204 is opened and the output shaft of the corresponding first single-shaft cylinder 1305 is retracted, opening the bottom of the raw coal particle receiving pipe 12. At this time, the screened raw coal particles fall into the corresponding receiving car 13 through the first discharge bellows 204, the raw coal particle receiving pipe 12, and the receiving bellows 1301 in sequence. When the stone coal on the screen plate 201 accumulates to a certain amount, the screw conveyor 1 is shut off to stop conveying the stone coal. At the same time, the rodless cylinder 303 is started, and the connecting plate 304 fixed on its slider drives the connecting rod 305 to slide. The connecting rod 305 pulls the sealing plate 301 and the sealing plug 302 fixedly connected to it in the stone coal discharge box 3 to move, so that the sealing ring on the sealing plate 301 fits against the inner wall of one side of the stone coal discharge box 3, providing a sealing guarantee. At this time, the discharge port 2 02 has been opened, and then the corresponding dome valve 1302 is opened and the output shaft of the corresponding first single-shaft cylinder 1305 is retracted, opening the bottom of the stone and coal receiving pipe 11. Then, the output shaft of the hydraulic cylinder 8 is extended, and its output shaft drives the connecting slider 7 to rise and move, thereby pushing the rotary table 6 to rotate around the hinge point of the transition seat 5, causing the vibrating screen box 2 to tilt. At this time, the stone and coal on the tilted screen plate 201 enters the stone and coal discharge box 3 through the discharge port 202, and is then transported to the stone and coal receiving pipe 11 through the stone and coal discharge pipe 306 and the second discharge corrugated pipe 307. Finally, it is discharged into the corresponding receiving car 13 through the corresponding receiving corrugated pipe 1301. In addition, the third sealing rings provided at the top of the stone and coal receiving pipe 11 and the raw coal particle receiving pipe 12 abut against the bottom of the second discharge corrugated pipe 307 and the first discharge corrugated pipe 204, respectively, to further strengthen the sealing.

[0031] After the stones and coal have been discharged, the above steps can be reversed to reset all components, and the screw conveyor 1 can be started again to transport the stones and coal, and to continue the screening of the stones and coal and the collection of raw coal particles.

[0032] When the material in the receiving trolley 13 reaches the set amount, if the receiving trolley 13 is used to collect raw coal particles, the material level sensor 15 on its top sends a signal, and the corresponding first single-shaft cylinder 1305 starts. Its output shaft pushes the corresponding sealing plate 1306 to move laterally. The sealing gasket 1307 on the top of the sealing plate 1306 abuts against the bottom of the receiving pipe to achieve a seal and prevent dust leakage. At the same time, the corresponding dome valve 1302 closes to prevent dust leakage from the receiving trolley 13. Then, the output shaft of the corresponding second single-shaft cylinder 14 is activated to retract, so that the receiving bellows 1301 is separated from the rectangular connecting sleeve 1303. Then, the corresponding two double-shaft cylinders 14 are activated. When the output shaft 601 retracts, the corresponding receiving cart 13 is released, and the receiving cart 13 can be pulled away manually or by a special traction device. Then, a new receiving cart 13 is pushed in and its side is aligned with the partition plate 10. Then, the output shafts of the two corresponding dual-shaft cylinders 1601 are extended to push the receiving cart 13 to the center position on the same vertical plane as the axis of the raw coal particle receiving pipe 12. Then, the output shaft of the second single-shaft cylinder 14 on it is extended to bring the receiving bellows 1301 on it upward to engage with the rectangular connecting sleeve 1303. Then, the output shaft of the first single-shaft cylinder 1305 is retracted, and the dome valve 1302 is opened to continue the vibrating screening operation. If the receiving car 13 that reaches the collection set value is a receiving car 13 used to collect stones and coal, since the output shaft of its corresponding first single-shaft cylinder 1305 is already in the extended state and its corresponding dome valve 1302 is already in the closed state, the output shaft of the corresponding second single-shaft cylinder 14 can be directly activated to retract, so that the corresponding connecting bellows 1301 is separated from the rectangular connecting sleeve 1303, and the receiving car 13 can be replaced in the same way as above. Thus, during the entire replacement process of the receiving car 13, a good collection environment can be provided through the sealing gasket 1307 and the sealing and closing of the dome valve 1302.

[0033] In subsequent use, when the entire device is not in use, the third single-shaft cylinder 18 fixed on the top of the rotary table 6 is activated, its output shaft extends, driving the limit block 19 to descend and finally abut against the contact folding strip 17, thereby preventing the vibrating screen box 2 from shaking arbitrarily and significantly; in addition, the maintenance door sealed on the opening side of the vibrating screen box 2 also facilitates subsequent maintenance of internal components.

[0034] Compared with related technologies, the stone and coal collection device provided by the present invention has the following beneficial effects: I. This invention, through the screening action of the sieve plate 201, can effectively separate raw coal particles mixed in stone coal, avoid resource waste, and improve the utilization rate of coal resources. Second, the present invention adopts a multi-seal design including a feed bellows 203, a discharge bellows, a sealing plug 302, a sealing plate 1306, and a dome valve 1302, which realizes full-process sealing from feeding, screening to unloading, completely solves the problem of dust flying in traditional open collection devices, and significantly improves the working environment. Third, by controlling the dome valve 1302 and the first single-shaft cylinder 1305, this invention can completely isolate the internal dust of the vibrating screen box 2 and the stone and coal discharge box 3, as well as the internal dust of the receiving cart 13, when changing the receiving cart 13, thereby further improving the working environment and ensuring the health of the staff.

[0035] Second embodiment: Based on the stone and coal collecting device provided in the first embodiment of this application, the second embodiment of this application proposes another stone and coal collecting device. The second embodiment is merely a further embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0036] The second embodiment of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Please refer to the following: Figures 16-22In the second embodiment of the stone and coal collecting device proposed in this invention: a rectangular placement ring 20 is fixed inside the vibrating screen box 2, and the bottom of the screen plate 201 contacts the rectangular placement ring 20 to improve the stability of the screen plate 201. A pull-out port 21 is provided on the side of the vibrating screen box 2 away from the stone and coal discharge box 3. A connecting strip 22 is provided inside the pull-out port 21. The connecting strip 22 fits against the inner wall of the pull-out port 21. One side of the connecting strip 22 is fixedly connected to the screen plate 201, and the other side of the connecting strip 22 extends to the outside of the vibrating screen box 2 and is fixed with a pull-out panel 23. A rectangular fourth sealing ring is provided between the pull-out panel 23 and the vibrating screen box 2. A positioning insert arm 24 is rotatably installed on the side of the pull-out panel 23 away from the vibrating screen box 2. A snap-fit ​​groove 25 is provided on the side of the positioning insert arm 24 away from the vibrating screen box 2, and one side of the positioning insert arm 24 is beveled. A positioning boss 26 is fixed on the side of the vibrating screen box 2 away from the stone and coal discharge box 3. A positioning socket 2601 is provided on the positioning boss 26. The positioning arm 24 passes through the positioning socket 2601 and fits against the inner wall of the positioning socket 2601. A hollow bracket 2602 is fixed on the side of the positioning boss 26 away from the vibrating screen box 2. A wedge-shaped insert block 2604 is provided inside the hollow bracket 2602. The inclined surface of the positioning arm 24 is adapted to the insert block 2604. One side of the insert block 2604 extends into the snap-fit ​​groove 25 to form an insertion effect. 2604 is slidably connected to one side of the positioning boss 26. The hollow bracket 2602 is provided with a linkage rod 2603. One end of the linkage rod 2603 is fixedly connected to the insert block 2604, and the other end extends to the outside of the hollow bracket 2602 and is slidably connected to one side of the hollow bracket 2602. A tension spring 2605 is sleeved on the linkage rod 2603. One end of the tension spring 2605 is fixedly connected to the insert block 2604, and the other end is fixedly connected to one side wall of the hollow bracket 2602.

[0038] In this embodiment When cleaning or replacing the screen plate 201 is required, pull the linkage rod 2603 outside the hollow bracket 2602 to drive the insert block 2604 to compress the spring 2605 and disengage it from the locking groove 25, thus releasing the limit on the positioning arm 24; rotate the positioning arm 24 to disengage it from the positioning socket 2601 of the positioning boss 26, and then pull the pull panel 23 to pull the screen plate 201 out of the pull port 21 through the connecting strip 22, completing the disassembly of the screen plate 201; after maintenance or replacement, reverse the above steps to reinsert the screen plate 201 into the vibrating screen. Inside the housing 2, the positioning arm 24 is rotated, and its inclined surface on one side forms an abutment with the wedge-shaped insert block 2604. Under the action of the tension spring 2605, the insert block 2604 retracts first. At this time, the tension spring 2605 is in a deeply compressed state. When the positioning arm 24 is inserted into place, the locking groove 25 corresponds to the insert block 2604. The deeply compressed tension spring 2605 rebounds, bringing the insert block 2604 into the locking groove 25, thus re-fixing the screen plate 201. The operation is convenient and does not require disassembling the vibrating screen housing 2, greatly improving maintenance efficiency.

[0039] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A stone and coal collecting device, comprising a screw conveyor, a support platform, a vibrating screen housing, and two receiving trolleys, characterized in that, The screw conveyor is fixedly equipped with a feed pipe and a discharge pipe. The vibrating screen housing is located below the screw conveyor, and the support platform is located below the vibrating screen housing. Both receiving carts are located below the support platform. The lower half of the vibrating screen housing is tapered. The screw conveyor is fixedly connected to the support platform via four support rods. The vibrating screen housing contains a screen plate. A feed corrugated pipe is fixedly installed on the top of the vibrating screen housing. The top end of the feed corrugated pipe is fixedly connected to the discharge pipe via a flange. A first discharge corrugated pipe is fixedly installed at the bottom of the tapered portion of the vibrating screen housing. The vibrating screen housing has a discharge port on one side, and a stone and coal discharge box is fixedly installed on the side of the vibrating screen housing with the discharge port. A transition seat is fixedly installed on the top of the support platform, and a rotating platform is hinged to the top of the transition seat. The first discharge corrugated pipe passes through the rotating platform but does not contact the rotating platform. A rotating lifting component is provided on the top of the support platform and is connected to the rotating platform, which enables the rotating platform to rotate the vibrating screen housing to an inclined state for easy discharge. A vibrating screening component is provided on the rotating platform and is connected to the vibrating screen housing. The support platform is fixedly installed with a stone and coal receiving pipe and a raw coal particle receiving pipe. The bottom end of the first discharge corrugated pipe is connected to the raw coal particle receiving pipe through a flange. The bottom of both the stone and coal receiving pipe and the raw coal particle receiving pipe are fitted with rectangular connecting sleeves. The top of both receiving cars is fixedly installed with receiving corrugated pipes. The bottom ends of the two rectangular connecting sleeves are conical, and the conical bottom ends of the two rectangular connecting sleeves extend into the two receiving corrugated pipes respectively.

2. The stone and coal collecting device according to claim 1, characterized in that, The screen plate is fixedly installed in the vibrating screen box by bolts. One side of the vibrating screen box is provided with an opening, and an inspection door is sealed on the open side of the vibrating screen box.

3. The stone and coal collecting device according to claim 1, characterized in that, The vibrating screen assembly includes an impact arm, which is fixedly installed on the outer wall of the vibrating screen housing away from the stone and coal discharge box. A rotary motor is fixedly installed on the top of the rotary table, and a cam is fixedly installed on the output shaft of the rotary motor. The protruding end of the cam is adapted to the impact arm. Four lifting rods are slidably installed on the rotary table. The top ends of the four lifting rods are fixedly connected to the vibrating screen housing. Spring retaining rings are fixedly sleeved on each of the four lifting rods. Return springs are sleeved on each of the four lifting rods. The top ends of the four return springs are fixedly connected to the four spring retaining rings, and the bottom ends of the four return springs are fixedly connected to the rotary table. Four shock-absorbing pads are fixedly installed on the top of the support platform. Expanding panels are fixedly installed on the bottom ends of the four lifting rods, and the four expanding panels abut against the four shock-absorbing pads.

4. The stone and coal collecting device according to claim 3, characterized in that, The rotating lifting assembly includes a hydraulic cylinder, which is fixedly installed on the top of the support platform. Two limiting slide rods are fixedly installed on the bottom of the rotating platform, and the same connecting slider is slidably installed on the two limiting slide rods. The output shaft of the hydraulic cylinder is hinged to the connecting slider.

5. The stone and coal collecting device according to claim 1, characterized in that, The side of the stone and coal discharge box that is in contact with the vibrating screen box is provided with an opening, which surrounds the discharge port. The lower half of the stone and coal discharge box is funnel-shaped, and a stone and coal discharge pipe is fixedly installed at the bottom of the funnel-shaped part of the stone and coal discharge box. A second discharge corrugated pipe is fixedly installed at the bottom end of the stone and coal discharge pipe. The bottom end of the second discharge corrugated pipe is fixedly connected to the stone and coal inlet pipe through a flange. A sealing plug is provided inside the discharge port, and a sealing plate is provided inside the stone and coal discharge box. A rodless cylinder is fixedly installed on the outer wall of the stone and coal discharge box away from the vibrating screen box, which is fixedly connected to the sealing plug. A connecting plate is fixedly installed on the slider of the rodless cylinder. The connecting plate is in contact with the outer wall of the stone and coal discharge box. A connecting rod is fixedly installed on one side of the connecting plate. One end of the connecting rod extends into the stone and coal discharge box and is fixedly connected to the sealing plate. The connecting rod is slidably connected to one side of the stone and coal discharge box. A sealing ring is fixedly installed on the side of the sealing plate away from the sealing plug.

6. The stone and coal collecting device according to claim 1, characterized in that, Both of the aforementioned bellows are equipped with dome valves. Both of the aforementioned rectangular connecting sleeves are fixedly fitted with mounting sleeves. The bottom of each of the two mounting sleeves is fixedly fitted with a sealing sleeve. Both of the aforementioned bellows are fixedly fitted with abutting rings, the tops of which abut against the two sealing sleeves respectively. The tops of both of the aforementioned rectangular connecting sleeves are fixedly fitted with first quadrilateral connecting sheet metal. Both the stone / coal connecting pipe and the raw coal particle connecting pipe are fixedly fitted with second quadrilateral connecting sheet metal. Both first quadrilateral connecting sheet metals are fixedly connected to their corresponding second quadrilateral connecting sheet metals by bolts. A first sealing ring is provided between the first and second quadrilateral connecting sheet metals. The two rectangular connecting sleeves are far apart from each other. A connecting shell is fixedly installed on the outer wall of each of the two connecting shells. A first single-shaft cylinder is fixedly installed on the outer wall of each of the two connecting shells on the side away from each other. The output shafts of the two first single-shaft cylinders extend into the corresponding connecting shells, and a sealing plate is fixedly installed on the output shaft of each of the two first single-shaft cylinders. The side of the two sealing plates that are close to each other extends into the two rectangular connecting sleeves, and a shuttle opening is opened on the side of the two rectangular connecting sleeves that are far from each other. The two sealing plates pass through the two shuttle openings, and a sealing gasket is fixedly installed on the top of each of the two sealing plates. The top of the two sealing gaskets abuts against the bottom of the stone and coal receiving pipe and the raw coal particle receiving pipe, respectively. The shuttle openings allow the sealing gaskets to move laterally.

7. The stone and coal collecting device according to claim 1, characterized in that, Two partition plates are fixedly installed at the bottom of the support platform. The sides of the two receiving carts that are close to each other are respectively attached to the two sides of the partition plates. Two back-connecting plates are fixedly installed on both sides of the partition plates. A dual-axis cylinder is fixedly installed on each of the four back-connecting plates. The output shafts of the four dual-axis cylinders pass through the corresponding back-connecting plates and are slidably connected to the corresponding back-connecting plates. A push plate is fixedly installed on the output shaft of each of the four dual-axis cylinders. The four push plates are paired and used in conjunction. The side of each push plate that is close to the receiving cart is inlaid with ball bearings, and the ball bearings on the four push plates are in contact with the corresponding receiving cart. A second single-axis cylinder is fixedly installed on the top of each of the two receiving carts. The output shafts of the two second single-axis cylinders are respectively fixedly connected to the top outer wall of the two receiving bellows. A material level sensor is fixedly installed on the top of each of the two receiving carts.

8. The stone and coal collecting device according to claim 1, characterized in that, A contact folding bar is fixedly installed at the bottom of the impact support arm. The contact folding bar passes through the rotary table and is slidably connected to the rotary table. A third single-axis cylinder is fixedly installed at the top of the rotary table. The output shaft of the third single-axis cylinder passes through the rotary table and is slidably connected to it. A limit block is fixedly installed on the output shaft of the third single-axis cylinder. The limit block is adapted to the contact folding bar. The limit block abuts against the contact folding bar by extending the output shaft of the third single-axis cylinder, thereby preventing the vibrating screen box from shaking randomly when not in use.

9. The stone and coal collecting device according to claim 8, characterized in that, The top of the feed pipe and the bottom of the discharge pipe are both provided with a second sealing ring. The top of the feed corrugated pipe abuts against the corresponding second sealing ring. The top of the stone and coal receiving pipe and the raw coal particle receiving pipe are both provided with a third sealing ring. The bottom of the first discharge corrugated pipe and the second discharge corrugated pipe abuts against the two third sealing rings respectively.

10. The stone and coal collecting device according to claim 1, characterized in that, A rectangular placement ring is fixedly installed inside the vibrating screen box. The bottom of the screen plate contacts the rectangular placement ring. A pull-out opening is provided on the side of the vibrating screen box away from the stone and coal discharge box. A connecting strip is provided inside the pull-out opening. The connecting strip fits against the inner wall of the pull-out opening. One side of the connecting strip is fixedly connected to the screen plate. The other side of the connecting strip extends to the outside of the vibrating screen box and is fixedly installed with a pull-out panel. A rectangular fourth sealing ring is provided between the pull-out panel and the vibrating screen box. A positioning arm is rotatably installed on the side of the pull-out panel away from the vibrating screen box. A snap-fit ​​groove is provided on the side of the positioning arm away from the vibrating screen box, and one side of the positioning arm is beveled. The side of the vibrating screen box away from the stone and coal discharge box is fixed. A positioning boss is installed, and a positioning socket is opened on the positioning boss. The positioning arm passes through the positioning socket and fits against the inner wall of the positioning socket. A hollow bracket is fixedly installed on the side of the positioning boss away from the vibrating screen box. A wedge-shaped insert block is provided in the hollow bracket. The inclined surface of the positioning arm is adapted to the insert block. One side of the insert block extends into the snap-fit ​​groove to form an insertion effect. The insert block is slidably connected to one side of the positioning boss. A linkage rod is provided in the hollow bracket. One end of the linkage rod is fixedly connected to the insert block, and the other end extends to the outside of the hollow bracket and is slidably connected to one side of the hollow bracket. A tension spring is sleeved on the linkage rod. One end of the tension spring is fixedly connected to the insert block, and the other end is fixedly connected to one side wall of the hollow bracket.

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