Coal screening equipment used in coal mining

Abstract

The present invention relates to the technical field of mineral screening, and specifically to a coal screening device used in coal mining, including a frame, a screening component is fixedly provided on the top of the frame, a feeding component is fixedly provided on the top of the frame, the feeding component is located at one end of the screening component, a feeding component is provided on the top of the screening component, and the screening component includes two side panels distributed on the left and right, a twisted tube is rotatably installed inside the two side panels, and a side surface of the two twisted tubes close to each other is fixedly installed with a lateral cover plate, two lateral covers. While the screening component is used to screen the coal into large and small particles, the coal stuck between the left and right first screening bars or the left and right second screening bars can be crushed, and the crushed coal falls back to the inside of a plurality of telescopic square rods by gravity to continue to participate in screening. Compared with the prior art, the blockage of the screen holes can be avoided, so that the device can stably screen the coal for a long time, which indirectly improves the screening efficiency of the coal.

Description

Technical Field

[0001] The invention relates to the technical field of ore screening, in particular to a coal screening device used in coal mining. Background Art

[0002] Coal mines are areas where humans mine coal resources in coal-rich mining areas. They are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, people usually choose to dig tunnels underground to mine coal. This is an underground coal mine. After the coal is mined, it must be screened by a screening machine. The screening machine uses the relative movement of bulk materials and the screen surface to allow some particles to pass through the screen holes, and classifies sand, gravel, crushed stone and other materials into different grades according to particle size. Vibration screening mechanical equipment;

[0003] According to a coal screening device used in coal mining disclosed in the Chinese patent application publication number: CN117463604A, the rotation of the sealing rod is controlled by a rotating mechanism. During the coal screening process, the baffle blocks part of the area inside the screen drum body to form a step-by-step screening of the coal blocks. The coal blocks can be fully screened by the screening device, thereby improving the screening accuracy of the coal blocks; the problem of low screening accuracy of the existing coal screening equipment is solved. However, when the above arrangement is used to screen the coal, the screen holes of the screen drum body are prone to being stuck by the coal, and cannot adapt to long-term stable screening, resulting in the coal screening efficiency being hindered. Summary of the invention

[0004] To this end, the present invention provides a coal screening device used in coal mining to solve the above-mentioned problems.

[0005] The present invention provides the following technical solution: A coal screening device used in coal mining, comprising a frame, a screening component is fixedly provided on the top of the frame, a feeding component is fixedly provided on the top of the frame, the feeding component is located at one end of the screening component, and a feeding component is provided on the top of the screening component;

[0006] The screening component includes two side panels distributed on the left and right, and twisted tubes are rotatably installed inside the two side panels, and a biased cover plate is fixedly installed on the side where the two twisted tubes are close to each other, and a plurality of telescopic openings distributed at equal angles are penetrated on the side where the two telescopic openings located on the left and right are slidably installed together with telescopic square rods, and the number of the telescopic square rods is multiple, and a plurality of first screening strips distributed on the left and right are fixedly installed on a side of the telescopic square rod close to an adjacent telescopic square rod, and a plurality of second screening strips distributed on the left and right are fixedly installed on a side of the telescopic square rod away from the first screening strip, wherein the adjacent first screening strips and second screening strips are distributed inside and outside, and the telescopic square rod is located between the left and right side panels, and a telescopic circular groove is penetrated inside the side panel away from the feeding component, and a telescopic circular groove is slidably installed inside the telescopic circular groove. The cam is located at the end side of the push cap away from the push rod, and a cam is fixedly installed on the bottom of the torsion block, and the cam is located at the end side of the push cap away from the push rod, and a driven bevel gear is fixedly installed on the top of the torsion rod, and an active bevel gear is meshed with the top periphery of the driven bevel gear, and a transmission transverse shaft is fixedly installed on the inner wall of the active bevel gear, and the transmission transverse shaft movably passes through the left and right side panels and is rotatably connected with the through holes of the two side panels through bearings, and a driven gear is fixedly installed on the outer wall of the transmission transverse shaft, and a transfer gear ring is fixedly installed on the outer wall of one of the partial cover plates, and the transfer gear ring is located at the bottom of the driven gear, and the transfer gear ring is meshed with the driven gear.

[0007] As a preferred solution of the present invention, a side panel on the same side as the feeding component is provided with a give-way groove on its upper side near the telescopic square rod, the give-way groove is located on the end side of the telescopic square rod near the top, a reset top plate is slidably installed inside the give-way groove, and two guide rods distributed front and rear are fixedly installed on the side of the reset top plate away from the telescopic square rod, the two guide rods movably penetrate the side panel and are slidably connected to the through holes of the side panel.

[0008] As a preferred solution of the present invention, a first return spring is sleeved on the periphery of the guide rod, and the first return spring is fixedly installed between the return top plate and the inner end surface of the give way slide groove.

[0009] As a preferred solution of the present invention, a second return spring is provided on the outer sleeve of the push rod, and the second return spring is fixedly installed between the push cap and the side panel.

[0010] As a preferred solution of the present invention, both ends of the telescopic square rod are provided with U-shaped grooves, guide wheels are rotatably installed inside the U-shaped grooves, and the outer edges of the guide wheels abut against the inner side surfaces of the side panels.

[0011] As a preferred solution of the present invention, a power motor is fixedly installed on the outer side surface of one of the side panels, the output shaft of the power motor movably passes through the side panel, and a driving gear is fixedly installed on the end of the output shaft of the power motor, and the driving gear is meshed with the intermediate gear ring.

[0012] As a preferred solution of the present invention, a screening bucket box is fixedly installed between the two side panels, a discharge port is opened through the bottom of the screening bucket box, and a discharge chute bucket is fixedly installed at the bottom of the screening bucket box, and the discharge chute bucket is located outside the discharge port.

[0013] As a preferred solution of the present invention, the lifting material component includes a lifting material cross bar fixedly installed on the outer wall of the transmission horizontal shaft, and the outer wall of the lifting material cross bar is fixedly installed with multiple lifting material plates distributed at equal angles, and the side of the lifting material plate away from the lifting material cross bar is provided with a buffer slide groove, and the inside of the buffer slide groove is slidably installed with a lifting material pressure block, and the lifting material pressure block is located at the top of a plurality of telescopic square rods.

[0014] As a preferred solution of the present invention, a side of the ejection pressing block close to the ejection cross bar is fixedly mounted with ejection springs distributed left and right, and one end of the ejection spring away from the ejection pressing block is fixedly connected to the inner end surface of the buffer chute.

[0015] As a preferred solution of the present invention, the feeding component includes a feeding hopper, a feeding pipe is fixedly installed at the bottom of the feeding hopper, the feeding pipe passes through the twisted tube and extends to the interior of multiple telescopic square rods, and four pillars are fixedly installed on the outer wall of the feeding hopper, and the bottoms of the four pillars are fixedly connected to the top of the frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, while the screening component is used to screen the coal into large and small particles, the rotation of the transit gear ring will also drive the transmission horizontal shaft to rotate through the driven gear. The rotation of the transmission horizontal shaft drives the driven bevel gear to rotate through the active bevel gear. The rotation of the driven bevel gear drives the torsion rod together with the cam to rotate. The rotation of the cam pushes the push cap and the push rod to move along the telescopic circular groove in the direction close to the telescopic square rod, and a telescopic square rod located at its end is moved along the telescopic opening in the direction close to the feeding component. The movement of the telescopic square rod drives the multiple first screening bars and the second screening bars connected thereto to move together, and a shearing effect is formed with the multiple first screening bars and the second screening bars fixedly installed on the adjacent telescopic square rods, so that the coal stuck between the left and right first screening bars or the left and right second screening bars can be crushed, and the crushed coal falls back to the inside of the multiple telescopic square rods through gravity to continue to participate in screening. Compared with the prior art, the sieve hole can be prevented from being blocked, so that the device can stably screen the coal for a long time, thereby indirectly improving the screening efficiency of the coal.

[0018] 2. In the present invention, the rotation of the transmission horizontal axis will also drive the top material cross bar together with multiple top material plates to rotate, and the rotation of multiple top material plates will drive multiple top material pressing blocks to rotate together, and when any top material pressing block rotates to the bottom, it is just located between the two adjacent telescopic square rods at the top, and under the elastic force of the buffer chute, the bottom of the top material pressing block applies a downward pushing force to the clamped coal, which can push the crushed coal downward, making it easier for the coal to fall off from the two clamped first screening bars or the two second screening bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention from the right front perspective;

[0020] Figure 2 It is a schematic diagram of the left front viewing angle structure of the present invention;

[0021] Figure 3 It is a front view structural schematic diagram of the screening component in the present invention;

[0022] Figure 4 It is a schematic diagram of the front half-section structure of the side panel of the present invention;

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0024] Figure 6 For the present invention Figure 4 A schematic diagram of the enlarged structure of part B;

[0025] Figure 7 For the present invention Figure 4 Schematic diagram of the enlarged structure of part C;

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the end portion of the lifting material component in the present invention;

[0027] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of part D.

[0028] In the figure: 1, frame; 2, screening component; 3, feeding component; 4, top material component; 201, side panel; 202, twisted tube; 203, partial cover plate; 204, telescopic opening; 205, telescopic square rod; 206, first screening strip; 207, second screening strip; 208, U-shaped groove; 209, guide wheel; 2010, chute for giving way; 2011, reset top plate; 2012, guide rod; 2013, first reset spring; 2014, telescopic circular groove; 2015, push rod; 2016, push cap; 2017, second reset spring; 2018 , torsion block; 2019, torsion rod; 2020, cam; 2021, driven bevel gear; 2022, driving bevel gear; 2023, transmission horizontal shaft; 2024, driven gear; 2025, transfer ring gear; 2026, driving gear; 2027, power motor; 2028, screening bucket box; 2029, discharge port; 2030, discharge chute bucket; 301, feeding hopper; 302, feeding pipe; 303, pillar; 401, ejector cross bar; 402, ejector plate; 403, buffer chute; 404, ejector pressure block; 405, ejector spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-9 The technical solution provided by the present invention specifically includes the following embodiments:

[0031] Embodiment 1:

[0032] A coal screening device used in coal mining, comprising a frame 1, a screening component 2 is fixedly provided on the top of the frame 1, a feeding component 3 is fixedly provided on the top of the frame 1, the feeding component 3 is located at one end of the screening component 2, and a feeding component 4 is provided on the top of the screening component 2;

[0033] The screening component 2 includes two side panels 201 distributed on the left and right, and the inside of the two side panels 201 is rotatably installed with a twisted tube 202, and the side of the two twisted tubes 202 close to each other is fixedly installed with a slanted cover plate 203, and the side of the two slanted cover plates 203 close to each other is penetrated with a plurality of telescopic openings 204 distributed at equal angles, wherein the insides of the two telescopic openings 204 located on the left and right are both slidably installed with telescopic square rods 205, and the number of the telescopic square rods 205 is multiple, and the side of the telescopic square rod 205 close to the adjacent telescopic square rod 205 is fixedly installed with a plurality of first screening strips distributed on the left and right 206, and a plurality of second screening strips 207 distributed left and right are fixedly installed on a side of the telescopic square rod 205 away from the first screening strip 206, wherein the adjacent first screening strips 206 and the second screening strips 207 are distributed inside and outside, and the telescopic square rod 205 is located between the two left and right side panels 201, wherein a telescopic circular groove 2014 is penetrated and opened inside the side panel 201 away from the feeding component 3, and a push rod 2015 is slidably installed inside the telescopic circular groove 2014, and the push rod 2015 is located at the end side of the telescopic square rod 205 at the top, and the end of the push rod 2015 away from the telescopic square rod 205 is fixedly installed. A push cap 2016 is fixedly installed, wherein a torsion block 2018 is fixedly installed on the outer side of a side panel 201 on the same side as the telescopic circular groove 2014, a torsion rod 2019 is rotatably installed inside the torsion block 2018, a cam 2020 is fixedly installed at the bottom of the torsion rod 2019, and the cam 2020 is located at the end side of the push cap 2016 away from the push rod 2015, a driven bevel gear 2021 is fixedly installed on the top of the torsion rod 2019, a driving bevel gear 2022 is meshed with the top periphery of the driven bevel gear 2021, and a transmission transverse shaft 2023 is fixedly installed on the inner wall of the driving bevel gear 2022 The transmission horizontal shaft 2023 movably penetrates the left and right side panels 201, and is rotatably connected with the through holes of the two side panels 201 through bearings. A driven gear 2024 is fixedly installed on the outer wall of the transmission horizontal shaft 2023. A transfer gear ring 2025 is fixedly installed on the outer wall of one of the partial cover plates 203. The transfer gear ring 2025 is located at the bottom of the driven gear 2024, and the transfer gear ring 2025 is meshed with the driven gear 2024. The outer periphery of the push rod 2015 is provided with a second return spring 2017, and the second return spring 2017 is fixedly installed between the push cap 2016 and the side panel 201;

[0034] A power motor 2027 is fixedly installed on the outer side of one of the side panels 201, and the output shaft of the power motor 2027 movably penetrates the side panel 201, and a driving gear 2026 is fixedly installed on the end of the output shaft of the power motor 2027, and the driving gear 2026 is meshed with the transfer gear ring 2025. A screening bucket box 2028 is fixedly installed between the two side panels 201, and a discharge port 2029 is opened through the bottom of the screening bucket box 2028. A discharge chute bucket 2030 is fixedly installed at the bottom of the screening bucket box 2028, and the discharge chute bucket 2030 is located outside the discharge port 2029;

[0035] Specifically, in this embodiment, the output shaft of the power motor 2027 drives the driving gear 2026 to rotate, and the driving gear 2026 rotates to drive the partial cover plate 203 to rotate through the transfer gear ring 2025. The rotation of the partial cover plate 203 also drives the multiple telescopic square rods 205 to rotate. The rotation of the telescopic square rods 205 drives the multiple first screening bars 206 and the multiple second screening bars 207 to rotate together, so that the coal inside the multiple telescopic square rods 205 rolls, and is screened through the gaps between the multiple first screening bars 206 and the gaps between the multiple second screening bars 207. Small pieces of coal are screened through the gaps between the first screening bars 206 and the gaps between the second screening bars 207 and fall into the inside of the screening bucket box 2028, and then pass through After the discharge port 2029 falls into the interior of the discharge chute bucket 2030, it is discharged outward. It should be noted that the multiple telescopic square rods 205 are set at an angle of 15°. Coal with larger particles cannot pass through the gap between the first screening bars 206 and fall into the screening bucket box 2028. As the multiple telescopic square rods 205 rotate, they gradually move toward the right end of the device and are finally sent out from the right end of the multiple telescopic square rods 205. During screening, if coal is stuck between the two adjacent first screening bars 206 and the two adjacent second screening bars 207, the coal will rotate with the telescopic square rods 205. At the same time, the rotation of the transit gear ring 2025 will also drive the transmission horizontal shaft 2023 to rotate through the driven gear 2024. The shaft 2023 rotates through the active bevel gear 2022 to drive the driven bevel gear 2021 to rotate, and the driven bevel gear 2021 rotates to drive the torsion rod 2019 and the cam 2020 to rotate. The cam 2020 rotates to push the push cap 2016 and the push rod 2015 to move along the telescopic circular groove 2014 toward the telescopic square rod 205, during which the second return spring 2017 is compressed. In this device, the specifications of the intermediate gear ring 2025, the driven gear 2024, the active bevel gear 2022, and the driven bevel gear 2021 are all adapted to each other, so that when the cam 2020 pushes the push rod 2015, one of the telescopic square rods 205 just moves to the end of the push rod 2015, so that under the thrust of the push rod 2015 When the telescopic square rod 205 is used, it moves along the telescopic opening 204 toward the feeding component 3. The movement of the telescopic square rod 205 drives the multiple first screening bars 206 and the second screening bars 207 connected thereto to move together, and forms a shearing effect with the multiple first screening bars 206 and the second screening bars 207 fixedly installed on the adjacent telescopic square rods 205, so that the coal stuck between the two left and right first screening bars 206 or the two left and right second screening bars 207 can be crushed, and the crushed coal falls back to the inside of the multiple telescopic square rods 205 through gravity and continues to participate in screening. Compared with the prior art, the sieve holes can be prevented from being blocked, so that the device can stably screen the coal for a long time, thereby indirectly improving the screening efficiency of the coal.

[0036] Furthermore, a side panel 201 on the same side as the feeding component 3 is provided with a yielding groove 2010 on the upper side of a side surface close to the telescopic square rod 205, and the yielding groove 2010 is located on the end side of the telescopic square rod 205 close to the top, and a reset top plate 2011 is slidably installed inside the yielding groove 2010, and two guide rods 2012 distributed front and rear are fixedly installed on the side of the reset top plate 2011 away from the telescopic square rod 205, and the two guide rods 2012 movably penetrate the side panel 201 and are slidably connected with the through holes of the side panel 201, and the periphery of the guide rods 2012 is sleeved with a first reset spring 2013, and the first reset spring 2013 is fixedly installed on the reset top plate 2011 and Between the inner end surfaces of the yielding groove 2010, when the telescopic square rod 205 is pushed by the cam 2020 to move in the direction of the feeding component 3, the end of the telescopic square rod 205 will push the reset top plate 2011 to move toward the inside of the yielding groove 2010, causing the two first reset springs 2013 to be compressed, and then after the cam 2020 rotates away from the push cap 2016, the rebound force of the second reset spring 2017 pushes the push rod 2015 and the push cap 2016 to reset, and the telescopic square rod 205 will not be pushed by the push rod 2015, causing the two first reset springs 2013 to rebound, pushing the reset top plate 2011 to move and reset, and during the resetting of the reset top plate 2011, the telescopic square rod 205 is pushed to reset together.

[0037] Furthermore, U-shaped grooves 208 are provided at both ends of the telescopic square rod 205, and guide wheels 209 are rotatably installed inside the U-shaped grooves 208. The outer edges of the guide wheels 209 abut against the inner side surfaces of the side panels 201. The U-shaped grooves 208 are provided for installing the guide wheels 209, so that during the rotation of the telescopic square rod 205, the guide wheels 209 roll along the inner side surfaces of the side panels 201. On the one hand, the telescopic square rod 205 will not move left and right during the rotation due to the left and right limiting action of the left and right guide wheels 209 and the inner side surfaces of the left and right side panels 201, thereby ensuring the stability of the rotation of the telescopic square rod 205. On the other hand, by arranging the guide wheels 209 to contact the inner side surfaces of the side panels 201, compared with the direct contact between the ends of the telescopic square rod 205 and the inner side surfaces of the side panels 201, the resistance of the telescopic square rod 205 during rotation can be reduced, so that the telescopic square rod 205 can rotate smoothly.

[0038] Embodiment 2:

[0039] The ejecting component 4 includes an ejecting cross bar 401 fixedly mounted on the outer wall of the transmission horizontal shaft 2023, a plurality of ejecting plates 402 distributed at equal angles are fixedly mounted on the outer wall of the ejecting cross bar 401, a buffer chute 403 is provided on the side of the ejecting plates 402 away from the ejecting cross bar 401, an ejecting pressing block 404 is slidably mounted inside the buffer chute 403, the ejecting pressing block 404 is located at the top of a plurality of telescopic square rods 205, and a side of the ejecting pressing block 404 close to the ejecting cross bar 401 is fixedly mounted with ejecting springs 405 distributed on the left and right, and one end of the ejecting spring 405 away from the ejecting pressing block 404 is fixedly connected to the inner end surface of the buffer chute 403;

[0040] Specifically, in this embodiment, the rotation of the transmission horizontal shaft 2023 will also drive the top material cross bar 401 to rotate together with multiple top material plates 402, and the rotation of multiple top material plates 402 will drive multiple top material pressure blocks 404 to rotate together. It should be noted that the gear ratio of the transit gear ring 2025 and the driven gear 2024 is set adaptively, so that when any top material pressure block 404 rotates to the bottom, it is just located between the two adjacent telescopic square rods 205 at the top, and under the elastic force of the buffer chute 403, the bottom of the top material pressure block 404 applies a downward pushing force to the clamped coal, which can push the crushed coal downward, making it easier for the coal to fall off from the two clamped first screening bars 206 or the two second screening bars 207.

[0041] Embodiment three:

[0042] The feeding component 3 includes a feeding hopper 301, a feeding pipe 302 is fixedly installed at the bottom of the feeding hopper 301, the feeding pipe 302 passes through the twisted tube 202, and extends to the inside of the multiple telescopic square rods 205, and four pillars 303 are fixedly installed on the outer wall of the feeding hopper 301, and the bottoms of the four pillars 303 are fixedly connected to the top of the frame 1;

[0043] Specifically, in this embodiment, coal is transported to the inside of the feeding hopper 301 through an external conveyor belt, and the coal transported to the inside of the feeding hopper 301 is discharged from the feeding pipe 302 into the inside of the multiple telescopic square rods 205, thereby continuously transporting the coal to the inside of the multiple telescopic square rods 205.

[0044] The coal screening equipment used in a coal mine of the present invention is used to transport coal to the inside of a feeding hopper 301 through an external conveyor belt when it is working. The coal transported to the inside of the feeding hopper 301 is discharged from the feeding pipe 302 into the inside of a plurality of telescopic square rods 205. At the same time, the output shaft of a power motor 2027 drives a driving gear 2026 to rotate. The rotation of the driving gear 2026 drives the deflection cover plate 203 to rotate through the transfer gear ring 2025. The rotation of the deflection cover plate 203 also drives the rotation of the plurality of telescopic square rods 205. The rotation of the telescopic square rods 205 drives the plurality of first screening strips 206 and the plurality of second screening strips 207 to rotate together, so that the coal inside the plurality of telescopic square rods 205 rolls, and at the same time, the coal inside the plurality of telescopic square rods 205 is spun. The coal is screened through the gaps between the first screening bars 206 and the second screening bars 207. The small pieces of coal are screened through the gaps between the first screening bars 206 and the gaps between the second screening bars 207 and fall into the screening bucket box 2028. Then, they fall into the discharge chute bucket 2030 through the discharge port 2029 and are discharged outward. It should be noted that the multiple telescopic square rods 205 are inclined at 15°. The coal with larger particles cannot pass through the gaps between the first screening bars 206 and fall into the screening bucket box 2028. As the multiple telescopic square rods 205 rotate, they move toward the right end of the device and are finally sent out from the right end of the multiple telescopic square rods 205.

[0045] During screening, if coal is stuck between the two adjacent first screening strips 206 and the two adjacent second screening strips 207, the coal will rotate with the telescopic square rod 205. At the same time, the rotation of the intermediate gear ring 2025 will also drive the transmission horizontal shaft 2023 to rotate through the driven gear 2024. The rotation of the transmission horizontal shaft 2023 drives the driven bevel gear 2021 to rotate through the active bevel gear 2022. The rotation of the driven bevel gear 2021 drives the torsion rod 2019 and the cam 2020 to rotate. The rotation of the cam 2020 pushes the push cap 2016 and the push rod 2024. 15 moves along the telescopic circular groove 2014 toward the direction close to the telescopic square rod 205, during which the second return spring 2017 is compressed. In this device, the specifications of the intermediate gear ring 2025, the driven gear 2024, the active bevel gear 2022, and the driven bevel gear 2021 are all adapted to each other, so that when the cam 2020 pushes the push rod 2015, one of the telescopic square rods 205 just moves to the end of the push rod 2015, so that under the thrust of the push rod 2015, the telescopic square rod 205 moves along the telescopic opening 204 toward the direction close to the feeding component 3. The telescopic square rod 205 moves and drives the multiple first screening bars 206 and the second screening bars 207 connected thereto to move together, and forms a shearing effect with the multiple first screening bars 206 and the second screening bars 207 fixedly installed on the adjacent telescopic square rods 205, so that the coal stuck between the left and right first screening bars 206 or the left and right second screening bars 207 can be crushed, and the crushed coal falls back to the inside of the multiple telescopic square rods 205 by gravity and continues to participate in screening. When the telescopic square rod 205 is pushed by the cam 2020 to move in the direction of the feeding component 3 The end of the telescopic square rod 205 will push the reset top plate 2011 to move toward the inside of the give-way slide groove 2010, causing the two first reset springs 2013 to be compressed. After the cam 2020 rotates away from the push cap 2016, the rebound force of the second reset spring 2017 pushes the push rod 2015 and the push cap 2016 to reset, and the telescopic square rod 205 will not be pushed by the push rod 2015, causing the two first reset springs 2013 to rebound, pushing the reset top plate 2011 to move and reset. During the reset of the reset top plate 2011, the telescopic square rod 205 is pushed to reset together;

[0046] The rotation of the transmission horizontal shaft 2023 will also drive the top material cross bar 401 to rotate together with multiple top material plates 402, and the rotation of multiple top material plates 402 will drive multiple top material pressure blocks 404 to rotate together. It should be noted that the gear ratio of the transit gear ring 2025 and the driven gear 2024 is set adaptively, so that when any top material pressure block 404 rotates to the bottom, it is just located between the two adjacent telescopic square rods 205 at the top, and under the elastic force of the buffer chute 403, the bottom of the top material pressure block 404 applies a downward pushing force to the clamped coal, which can push the crushed coal downward, making it easier for the coal to fall off from the two clamped first screening bars 206 or the two second screening bars 207.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal screening device for coal mining, characterized in that: The machine comprises a frame (1), a screening component (2) is fixedly provided on the top of the frame (1), a feeding component (3) is fixedly provided on the top of the frame (1), the feeding component (3) is located at one end of the screening component (2), and a feeding component (4) is provided on the top of the screening component (2); The screening component (2) comprises two side panels (201) distributed on the left and right, a twisted tube (202) is rotatably installed inside the two side panels (201), a side surface of the two twisted tubes (202) close to each other is fixedly installed with a slanted cover plate (203), and a side surface of the two slanted cover plates (203) close to each other is penetrated with a plurality of telescopic openings (204) distributed at equal angles, wherein a telescopic square rod (205) is slidably installed inside the two telescopic openings (204) located on the left and right, and the number of the telescopic square rods (205) is plural, and the telescopic square rod (205) is fixedly installed on a side surface of a telescopic square rod (205) close to an adjacent telescopic square rod (205). There are a plurality of first screening strips (206) distributed on the left and right, and a plurality of second screening strips (207) distributed on the left and right are fixedly installed on a side of the telescopic square rod (205) away from the first screening strips (206), wherein the adjacent first screening strips (206) and second screening strips (207) are distributed inside and outside, and the telescopic square rod (205) is located between two left and right side panels (201), wherein a telescopic circular groove (214) is penetrated and opened inside one of the side panels (201) away from the feeding component (3), and a push rod (215) is slidably installed inside the telescopic circular groove (214), and the push rod (215) is located on the top of the telescopic square rod ( The telescopic square rod (205) is provided at an end side of the push rod (2015), a push cap (2016) is fixedly mounted at one end of the push rod (2015) away from the telescopic square rod (205), a twist block (2018) is fixedly mounted on the outer side surface of one of the side panels (201) on the same side as the telescopic circular groove (2014), a twist rod (2019) is rotatably mounted inside the twist block (2018), a cam (2020) is fixedly mounted at the bottom of the twist rod (2019), the cam (2020) is located at the end side of the push cap (2016) away from the push rod (2015), a driven bevel gear (2021) is fixedly mounted on the top of the twist rod (2019), and the driven bevel gear (2021) ) is meshed with a driving bevel gear (2022) on the top periphery, a driving bevel gear (2022) is fixedly mounted on the inner wall of the driving bevel gear (2022), the driving transverse shaft (2023) movably penetrates the left and right side panels (201), and is rotatably connected to the through holes of the two side panels (201) via bearings, a driven gear (2024) is fixedly mounted on the outer wall of the driving transverse shaft (2023), a transfer gear ring (2025) is fixedly mounted on the outer wall of one of the partial cover plates (203), the transfer gear ring (2025) is located at the bottom of the driven gear (2024), and the transfer gear ring (2025) is meshed with the driven gear (2024).

2. A coal screening device for coal mining according to claim 1, characterized in that: A side panel (201) on the same side as the feeding component (3) is provided with a clearance groove (210) on the upper side of a side surface close to the telescopic square rod (205); the clearance groove (210) is located at the end side of the telescopic square rod (205) close to the top; a reset top plate (211) is slidably installed inside the clearance groove (210); two guide rods (212) distributed front and rear are fixedly installed on a side of the reset top plate (211) away from the telescopic square rod (205); the two guide rods (212) movably penetrate the side panel (201) and are slidably connected to the through holes of the side panel (201).

3. A coal screening device for coal mining according to claim 2, characterized in that: The outer periphery of the guide rod (2012) is sleeved with a first return spring (2013), and the first return spring (2013) is fixedly installed between the return top plate (2011) and the inner end surface of the yielding slide groove (2010).

4. The coal screening equipment used in coal mining according to claim 1, characterized in that: The outer sleeve of the push rod (2015) is provided with a second return spring (2017), and the second return spring (2017) is fixedly installed between the push cap (2016) and the side panel (201).

5. The coal screening equipment used in coal mining according to claim 1, characterized in that: Both ends of the telescopic square rod (205) are provided with U-shaped grooves (208), and guide wheels (209) are rotatably mounted inside the U-shaped grooves (208), and the outer edges of the guide wheels (209) abut against the inner side surfaces of the side panels (201).

6. The coal screening equipment used in coal mining according to claim 1, characterized in that: A power motor (2027) is fixedly mounted on the outer side surface of one of the side panels (201); an output shaft of the power motor (2027) movably penetrates the side panel (201); and a driving gear (2026) is fixedly mounted on the end of the output shaft of the power motor (2027); the driving gear (2026) is meshed with the intermediate gear ring (2025).

7. The coal screening equipment used in coal mining according to claim 1, characterized in that: A screening bucket box (2028) is fixedly installed between the two side panels (201), a discharge port (2029) is provided through the bottom of the screening bucket box (2028), a discharge chute bucket (2030) is fixedly installed at the bottom of the screening bucket box (2028), and the discharge chute bucket (2030) is located outside the discharge port (2029).

8. The coal screening equipment used in coal mining according to claim 1, characterized in that: The ejection component (4) comprises an ejection cross bar (401) fixedly mounted on the outer wall of the transmission horizontal shaft (2023); a plurality of ejection plates (402) distributed at equal angles are fixedly mounted on the outer wall of the ejection cross bar (401); a buffer chute (403) is provided on a side of the ejection plate (402) away from the ejection cross bar (401); an ejection pressing block (404) is slidably mounted inside the buffer chute (403); and the ejection pressing block (404) is located on top of a plurality of telescopic square rods (205).

9. A coal screening device for coal mining according to claim 8, characterized in that: A side surface of the ejection pressing block (404) close to the ejection cross bar (401) is fixedly mounted with ejection springs (405) distributed left and right, and an end of the ejection spring (405) away from the ejection pressing block (404) is fixedly connected to the inner end surface of the buffer chute (403).

10. The coal screening equipment used in coal mining according to claim 1, characterized in that: The feeding component (3) comprises a feeding hopper (301), a feeding pipe (302) being fixedly mounted at the bottom of the feeding hopper (301), the feeding pipe (302) passing through the twisted tube (202) and extending to the interior of a plurality of telescopic square rods (205), and four pillars (303) being fixedly mounted on the outer wall of the feeding hopper (301), the bottoms of the four pillars (303) being fixedly connected to the top of the frame (1).

Images