CN113928803A

CN113928803A - A scalable rubber belt conveyor for high-efficient gangue separator

Info

Publication number: CN113928803A
Application number: CN202111204933.9A
Authority: CN
Inventors: 王爽; 李德永; 郭永存; 胡坤; 王鹏彧; 周军鹏; 马鑫
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-01-14
Anticipated expiration: 2041-10-15
Also published as: CN113928803B

Abstract

The invention relates to the technical field of conveyors, in particular to a telescopic rubber belt conveyor for a high-efficiency coal gangue separation device, which comprises a shell, wherein the inner wall of the shell is rotatably connected with a first belt pulley, the inner wall of the shell is positioned at the bottom of the first belt pulley and is rotatably connected with a second belt pulley, one side of the bottom of the inner wall of the shell, which is far away from the second belt pulley, is rotatably connected with a power belt pulley, rectangular through holes are formed in the two sides of the shell, slide bars are fixedly connected to the top and the bottom of each rectangular through hole, and a bearing seat is slidably connected between the two slide bars. Through the extension of control pneumatic cylinder output shaft or shorten, the positive and negative rotation of cooperation second motor to control power band pulley is close to or keeps away from first band pulley, makes the length that the sticky tape can be transported reduce or increase, thereby improves the flexibility, need not like cutting the sticky tape off among the prior art by force, utilizes the nail to detain the card with extra sticky tape section install on the sticky tape of being cut off, thereby accomplish the increase of sticky tape transportation distance.

Description

A scalable rubber belt conveyor for high-efficient gangue separator

Technical Field

The invention relates to the technical field of conveyors, in particular to a telescopic rubber belt conveyor for a high-efficiency coal gangue separation device.

Background

The telescopic rubber belt conveyor is mainly used for a raw coal transportation task of a coal mine underground stope face, and can form a material conveying flow from an initial feeding point to a final discharging point on a certain conveying line. The conveying of broken bulk material both can have been carried out to it, also can carry out the transport of finished product article, generally transport the coal gangue fragment from one end to pneumatic sieving mechanism and fall, sieve coal gangue and coal by pneumatic sieving mechanism, and when the transportation, the screening structure at sticky tape top can divide into several lines with the coal gangue, and the pneumatic sieving mechanism of being convenient for sieves.

At present, when the transportation distance of a telescopic rubber belt conveyor on the market is adjusted, the rubber belt is often cut off forcibly, extra rubber belt segments are installed on the cut rubber belt by utilizing a button attaching clamp, and the transmission structure after extension is matched, thereby increasing the transportation distance of the adhesive tape, causing troublesome operation, needing more wasted button attaching clips and seriously reducing the service life of the adhesive tape, meanwhile, when the coal gangue is transported by the adhesive tape, a small amount of coal gangue is transported by tensioning the adhesive tape, or the adhesive tape is supported by mounting supporting plates with different lengths at the bottom, so that a large amount of coal gangue is transported, but due to sliding friction, the abrasion to the adhesive tape is larger, so that the requirement of the adhesive tape transportation device for adjusting the transportation length conveniently, the adhesive tape is not damaged during adjustment, the transportation capacity is improved, the telescopic rubber belt conveyor for the efficient coal gangue separation device reduces the abrasion of the rubber belt.

The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a telescopic rubber belt conveyor for a high-efficiency coal gangue separation device.

The technical scheme adopted by the invention for solving the technical problems is as follows: a telescopic rubber belt conveyor for a high-efficiency coal gangue separation device comprises a shell, wherein a first belt wheel is rotatably connected to the inner wall of the shell, a second belt wheel is rotatably connected to the inner wall of the shell, which is positioned at the bottom of the first belt wheel, one side of the bottom of the inner wall of the shell, which is far away from the second belt wheel, is rotatably connected with a power belt wheel, rectangular through holes are respectively formed in the inner parts of two sides of the shell, slide rods are respectively and fixedly connected with the top and the bottom of each rectangular through hole, a bearing seat is slidably connected between the two slide rods, an adjusting belt wheel is rotatably connected between the two bearing seats, hydraulic cylinders are respectively and fixedly connected with two sides of the outer wall of the shell, an L-shaped rod is fixedly connected with the top of an output shaft of each hydraulic cylinder, one ends of the L-shaped rods, which are far away from the hydraulic cylinders, penetrate through the shell and are slidably connected with the shell, one ends of the two L-shaped rods, which are far away from the hydraulic cylinders, are jointly rotatably connected with a scissor-type mechanical structure, two T-shaped blocks are rotatably connected at one end of the scissor type mechanical structure far away from the L-shaped rod, a moving block is arranged at one end of the scissor type mechanical structure far away from the L-shaped rod, two T-shaped grooves are arranged on one side of the moving block close to the scissor type mechanical structure, the T-shaped block is connected with the T-shaped grooves in a sliding manner, two placing grooves are arranged on one side of the shell close to the moving block, an extension rod is connected in the placing grooves in a sliding manner, the extension rod is fixedly connected with the moving block, one side of the moving block, which is far away from the extension rod, is fixedly connected with two limit plates, an extension belt wheel is rotatably connected between the two limit plates, the extension belt wheel, the adjusting belt wheel, the power belt wheel, the first belt wheel and the second belt wheel are externally connected with adhesive tapes in a rolling way, the utility model discloses a power pulley, including casing outer wall, first backup pad, first motor output shaft top and power pulley fixed connection, casing outer wall one side fixedly connected with first backup pad, first backup pad top fixedly connected with motor, first motor output shaft top and power pulley fixed connection.

Specific speaking, the equal fixedly connected with locating piece in casing outer wall both sides, it is connected with the lead screw to rotate between two locating pieces, lead screw one end runs through the locating piece, the outside threaded connection of lead screw has the drive block, drive block and bearing frame fixed connection, the equal fixedly connected with second backup pad in casing outer wall both sides, second backup pad top fixedly connected with second motor, second motor output shaft top fixedly connected with first gear, the meshing of first gear top has the second gear, the second gear runs through locating piece one end fixed connection with the lead screw.

Specific speaking, casing and elongation rod top all open and have the first rectangular hole that is linear array and distributes, threaded hole is opened to first rectangular hole both sides, the inside sliding connection of first rectangular hole has the T shaped plate, T shaped plate bottom surface and the laminating of casing top surface, second rectangular hole has all been opened at T shaped plate both ends.

Specifically speaking, the inside sliding connection of second rectangular hole has the rectangular block, rectangular hole one end fixedly connected with locating plate is kept away from to the rectangular block, two symmetric distribution's cylinder hole has been run through to the inside of locating plate, the inside sliding connection of cylinder hole has the bolt, bolt and screw hole threaded connection.

Specifically speaking, the top of the T-shaped plate is provided with a plurality of spherical holes distributed in a linear array, the inside of each spherical hole is connected with a ball in a rolling manner, and the balls are attached to the adhesive tapes.

Specifically, the height of the T-shaped plate slidably connected with the first rectangular hole in the extension rod is larger than that of the T-shaped plate slidably connected with the first rectangular hole in the housing, and the top surface of the T-shaped plate mounted on the extension rod and the top surface of the T-shaped plate mounted on the housing are in the same plane.

The invention has the beneficial effects that:

(1) according to the telescopic rubber belt conveyor for the efficient coal gangue separation device, the extension or shortening of the output shaft of the hydraulic cylinder is controlled, and the forward and reverse rotation of the second motor is matched, so that the power belt wheel is controlled to be close to or far away from the first belt wheel, the length of a rubber belt capable of being conveyed is reduced or increased, the flexibility is improved, the rubber belt does not need to be cut off forcibly like in the prior art, and an extra rubber belt segment is installed on the cut rubber belt by using the button attaching clamp, so that the increase of the conveying distance of the rubber belt is completed, the damage to the rubber belt is reduced, and the service life of the rubber belt is prolonged.

(2) According to the telescopic rubber belt conveyor for the efficient coal gangue separation device, when the coal gangue is conveyed through the rubber belt, the coal gangue drives the bottom surface of the rubber belt to be attached to the balls at the tops of the T-shaped plates under the action of gravity, so that rolling friction is realized, and meanwhile, the balls support the rubber belt, so that the rubber belt can convey more coal gangue without fracture.

(3) According to the telescopic rubber belt conveyor for the efficient coal gangue separation device, the output shaft of the hydraulic cylinder is shortened, the second motor rotates, the movable plate drives the extension rod to extend out of the shell, the T-shaped plates can be arranged on the shell and the extension rod, the rubber belts can be supported by the T-shaped plates in different numbers when the conveying distance of the rubber belts is increased, and the stability and the load capacity during conveying are guaranteed.

Drawings

For a clearer explanation of the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic view of the overall structure provided by the present invention;

FIG. 2 is a first perspective view, partially in section, provided by the present invention;

FIG. 3 is a second perspective view, partly in section, provided by the present invention;

FIG. 4 is a third perspective view, partially in section, provided by the present invention;

FIG. 5 is a comparative illustration of the wand and housing top T-plate provided by the present invention;

fig. 6 is an enlarged view of the portion a of fig. 4 according to the present invention.

In the figure: 1. the device comprises a shell, 2, a first belt wheel, 3, a second belt wheel, 4, a power belt wheel, 5, a rectangular through hole, 6, a sliding rod, 7, a bearing seat, 8, an adjusting belt wheel, 9, a hydraulic cylinder, 10, an L-shaped rod, 11, a scissor type mechanical structure, 12, a T-shaped block, 13, a moving block, 14, a T-shaped groove, 15, a placing groove, 16, an extension rod, 17, a limiting plate, 18, an extension belt wheel, 19, an adhesive tape, 20, a first supporting plate, 21, a first motor, 22, a positioning block, 23, a lead screw, 24, a transmission block, 25, a second supporting plate, 26, a second motor, 27, a first gear, 28, a second gear, 29, a first rectangular hole, 30, a threaded hole, 31, a T-shaped plate, 32, a second rectangular hole, 33, a rectangular block, 34, a positioning plate, 35, a cylindrical hole, 36, a spherical hole, 37 and a ball.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in figures 1-6, the telescopic belt conveyor for the high-efficiency coal gangue separation device comprises a shell 1, wherein a first belt pulley 2 is rotatably connected to the inner wall of the shell 1, a second belt pulley 3 is rotatably connected to the inner wall of the shell 1, which is positioned at the bottom of the first belt pulley 2, a power belt pulley 4 is rotatably connected to one side of the bottom of the inner wall of the shell 1, which is far away from the second belt pulley 3, rectangular through holes 5 are respectively formed in the two sides of the shell 1, slide rods 6 are respectively and fixedly connected to the top and the bottom of the rectangular through holes 5, a bearing seat 7 is slidably connected between the two slide rods 6, an adjusting belt pulley 8 is rotatably connected between the two bearing seats 7, hydraulic cylinders 9 are respectively and fixedly connected to two sides of the outer wall of the shell 1, an L-shaped rod 10 is fixedly connected to the top ends of output shafts of the hydraulic cylinders 9, one end of the L-shaped rod 10, which is far away from the hydraulic cylinders 9, penetrates through the shell 1 and is slidably connected with the shell 1, the end, far away from the hydraulic cylinder 9, of each of the two L-shaped rods 10 is jointly and rotatably connected with a scissor type mechanical structure 11, one end, far away from the L-shaped rod 10, of the scissor type mechanical structure 11 is rotatably connected with two T-shaped blocks 12, one end, far away from the L-shaped rod 10, of the scissor type mechanical structure 11 is provided with a moving block 13, one side, close to the scissor type mechanical structure 11, of the moving block 13 is provided with two T-shaped grooves 14, the T-shaped blocks 12 are slidably connected with the T-shaped grooves 14, one side, close to the moving block 13, of the shell 1 is provided with two placing grooves 15, the inside of each of the placing grooves 15 is slidably connected with an extension rod 16, the extension rod 16 is fixedly connected with the moving block 13, one side, far away from the extension rod 16, of the moving block 13 is fixedly connected with two limiting plates 17, an extension belt wheel 18 is rotatably connected between the two limiting plates 17, and the outer portions of the extension belt wheel 18, the adjustment belt wheel 8, the power belt wheel 4, the first belt wheel 2 and the second belt wheel 3 are rotatably connected with adhesive tapes 19, a first support plate 20 is fixedly connected to one side of the outer wall of the shell 1, a first motor 21 is fixedly connected to the top of the first support plate 20, the top end of an output shaft of the first motor 21 is fixedly connected with the power belt pulley 4, the output shaft is shortened through the hydraulic cylinder 9, so that the L-shaped rod 10 is driven to slide towards the inside of the shell 1, the L-shaped rod 10 drives the scissor-type mechanical structure 11 to move, the scissor-type mechanical structure 11 is extended, so that the moving block 13 is driven to move towards the direction far away from the scissor-type mechanical structure 11, the moving block 13 drives the extension rod 16 to slide outwards from the placing groove 15, meanwhile, the bearing seat 7 drives the adjusting belt pulley 8 to slide towards the direction close to the moving block 13 in the rectangular through hole 5, the extension belt pulley 18 is driven by the moving block 13 to be far away from the first belt pulley 2, the distance between the first belt pulley 2 and the extension belt pulley 18 is increased, and the distance between the first belt pulley 2 and the power belt pulley 4 is shortened, therefore, the length of the telescopic machine capable of being transported is lengthened, the first motor 21 drives the power belt wheel 4 to rotate during operation, the power belt wheel 4 drives the adhesive tape 19 to move, and therefore the coal gangue falling to the top of the adhesive tape 19 is transported to one end of the extension belt wheel 18.

Specifically, both sides of the outer wall of the housing 1 are fixedly connected with positioning blocks 22, a lead screw 23 is rotatably connected between the two positioning blocks 22, one end of the lead screw 23 penetrates through the positioning blocks 22, the outer part of the lead screw 23 is in threaded connection with a transmission block 24, the transmission block 24 is fixedly connected with the bearing seat 7, both sides of the outer wall of the housing 1 are fixedly connected with a second supporting plate 25, the top of the second supporting plate 25 is fixedly connected with a second motor 26, the top of an output shaft of the second motor 26 is fixedly connected with a first gear 27, the top of the first gear 27 is engaged with a second gear 28, the second gear 28 is fixedly connected with one end of the lead screw 23 penetrating through the positioning blocks 22, the first gear 27 is driven to rotate by the second motor 26, the first gear 27 drives the second gear 28 to rotate, the second gear 28 drives the lead screw 23 to rotate, and the lead screw 23 drives the transmission block 24 to move on the lead screw 23, the transmission block 24 drives the bearing seat 7 to slide in the rectangular through hole 5, so that the distance between the adjusting belt wheel 8 and the power belt wheel 4 is changed, and the length of coal gangue transportation is changed by matching with the extension belt wheel 18.

Specific speaking, casing 1 and extension rod 16 top all are opened first rectangular hole 29 that is the linear array and distributes, threaded hole 30 is opened to first rectangular hole 29 both sides, the inside sliding connection of first rectangular hole 29 has T shaped plate 31, the laminating of T shaped plate 31 bottom surface and 1 top surface of casing, second rectangular hole 32 has all been opened at T shaped plate 31 both ends, and through inserting T shaped plate 31 bottom in first rectangular hole 29, it is spacing at casing 1 top with T shaped plate 31, supports sticky tape 19, prevents that sticky tape 19 from drooping under the gravity of gangue to lead to sticky tape 19 to burst, make sticky tape 19 can obtain promoting with the weight of the gangue of transportation.

Specifically, the inside of the second rectangular hole 32 is slidably connected with a rectangular block 33, one end of the rectangular block 33, which is far away from the rectangular hole, is fixedly connected with a positioning plate 34, two symmetrically distributed cylindrical holes 35 penetrate through the inside of the positioning plate 34, a bolt is slidably connected inside the cylindrical hole 35, the bolt is in threaded connection with the threaded hole 30, the rectangular block 33 is inserted into the second rectangular hole 32, and then the positioning plate 34 is fixed on the casing 1 through the bolt, so that the T-shaped plate 31 is fixed on the casing 1, and the T-shaped plate 31 is convenient to disassemble and assemble.

Specifically, the top of the T-shaped plate 31 is provided with a plurality of spherical holes 36 distributed in a linear array, the balls 37 are connected in the spherical holes 36 in a rolling manner, the balls 37 are attached to the adhesive tape 19, and the balls 37 are connected on the top of the T-shaped plate 31 in a rolling manner, so that when the adhesive tape 19 is in contact with the T-shaped plate 31, the sliding connection is changed into rolling connection, the friction of the adhesive tape 19 is reduced, and the service life of the adhesive tape 19 is prolonged.

Specifically, the height of the T-shaped plate 31 slidably connected to the first rectangular hole 29 of the extension rod 16 is greater than the height of the T-shaped plate 31 slidably connected to the first rectangular hole 29 of the housing 1, the top surface of the T-shaped plate 31 mounted on the extension rod 16 and the top surface of the T-shaped plate 31 mounted on the housing 1 are located on the same plane, and the top surfaces are located on the same plane due to the different heights of the T-shaped plates 31 on the extension rod 16 and the housing 1, so that the adhesive tape 19 and the top surface of the T-shaped plate 31 are always attached after the extension pulley 18 is extended.

The working principle of the invention is as follows: and (3) adjusting: respectively starting the hydraulic cylinder 9 and the second motor 26, enabling the scissor type mechanical structure 11 to drive the extension belt wheel 18 to be far away from the first belt wheel 2, enabling the adjusting belt wheel 8 to be close to the power belt wheel 4, so that the transportation length of the adhesive tape 19 on the top of the shell 1 is increased, then placing the corresponding T-shaped plate 31 on the shell 1 and the extension rod 16, installing the positioning plate 34 on the shell 1 through bolts, and completing the installation of the T-shaped plate 31, wherein the adhesive tape 19 is attached to the top surface of the T-shaped plate 31;

the working steps are as follows: the coal gangue continuously falls onto the adhesive tape 19, the first motor 21 is started, the first motor 21 drives the power belt pulley 4 to roll, the power belt pulley 4 drives the adhesive tape 19, the adhesive tape 19 drives the ball 37 to rotate, the adhesive tape 19 conveys the coal gangue at the top to one end of the extension belt pulley 18 to fall, so that the coal gangue is conveyed, the coal gangue falls in several rows by matching with a screening structure at the top, and then the coal gangue is screened by matching with a pneumatic screening device;

the extension or shortening of the output shaft of the hydraulic cylinder 9 is controlled to be matched with the forward and reverse rotation of the second motor 26, so that the power belt wheel 4 is controlled to be close to or far away from the first belt wheel 2, the length of the adhesive tape 19 capable of being transported is reduced or increased, the flexibility is improved, the adhesive tape 19 does not need to be cut off forcibly like the prior art, an extra adhesive tape 19 segment is installed on the cut adhesive tape 19 by using a button sewing clamp, the transportation distance of the adhesive tape 19 is increased, the damage to the adhesive tape 19 is reduced, and the service life of the adhesive tape 19 is prolonged;

when the coal gangue is transported through the adhesive tape 19, the coal gangue drives the bottom surface of the adhesive tape 19 to be attached to the ball 37 at the top of the T-shaped plate 31 under the action of gravity, so that rolling friction is realized, and meanwhile, the ball 37 supports the adhesive tape 19, so that the adhesive tape 19 can transport more coal gangue without fracture;

the second motor 26 rotates while the output shaft of the hydraulic cylinder 9 is shortened, so that the movable plate drives the extension rod 16 to extend out of the shell 1, the T-shaped plates 31 can be installed on the shell 1 and the extension rod 16, different numbers of T-shaped plates 31 can be installed to support the adhesive tape 19 under the condition that the transportation distance of the adhesive tape 19 is increased, and the stability and the load capacity during transportation are ensured, the embodiment specifically solves the problems that when the transportation distance of a telescopic adhesive tape 19 conveyor in the prior art is adjusted, the adhesive tape 19 is required to be cut off forcibly, extra adhesive tape 19 segments are installed on the cut adhesive tape 19 by using the nail fastener, and the transmission structure after extension is matched, so that the increase of the transportation distance of the adhesive tape 19 is completed, the operation is troublesome, more nail fasteners are required to be wasted, and the service life of the adhesive tape 19 per se is seriously reduced, simultaneously sticky tape 19 is when transporting the gangue, or a small amount of gangue is transported through the tensioning of self, or the backup pad of the different length of bottom installation supports sticky tape 19 again, thereby transport a large amount of gangue, nevertheless because be sliding friction, it is great to sticky tape 19's wearing and tearing, consequently need for one kind and be convenient for adjust transportation length, can not lead to the fact destruction to sticky tape 19 during the regulation, when the capacity obtains promoting, reduce the problem of the scalable rubber belt conveyor who is used for high-efficient gangue separator of the 19 wearing and tearing of sticky tape.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. The utility model provides a scalable band conveyer for high-efficient gangue separator which characterized in that: comprises a shell (1), wherein the inner wall of the shell (1) is rotatably connected with a first belt wheel (2), the inner wall of the shell (1) is positioned at the bottom of the first belt wheel (2) and is rotatably connected with a second belt wheel (3), one side of the inner wall of the shell (1) far away from the second belt wheel (3) is rotatably connected with a power belt wheel (4), rectangular through holes (5) are formed in the two sides of the shell (1), slide bars (6) are fixedly connected with the top and the bottom of the rectangular through holes (5), a bearing seat (7) is slidably connected between the two slide bars (6), an adjusting belt wheel (8) is rotatably connected between the two bearing seats (7), hydraulic cylinders (9) are fixedly connected with the two sides of the outer wall of the shell (1), an L-shaped rod (10) is fixedly connected with the top of an output shaft of the hydraulic cylinders (9), one end of the L-shaped rod (10) far away from the hydraulic cylinders (9) penetrates through the shell (1) and is slidably connected with the shell (1), one end, far away from the hydraulic cylinder (9), of each of the two L-shaped rods (10) is connected with a scissor type mechanical structure (11) in a rotating mode, one end, far away from the L-shaped rods (10), of each scissor type mechanical structure (11) is connected with two T-shaped blocks (12) in a rotating mode, one end, far away from the L-shaped rods (10), of each scissor type mechanical structure (11) is provided with a moving block (13), one side, close to the scissor type mechanical structure (11), of each moving block (13) is provided with two T-shaped grooves (14), the T-shaped blocks (12) are connected with the T-shaped grooves (14) in a sliding mode, one side, close to the moving block (13), of the shell (1) is provided with two placing grooves (15), the inside of each placing groove (15) is connected with an extension rod (16) in a sliding mode, the extension rod (16) is fixedly connected with the moving block (13), and one side, far away from the extension rod (16), of the moving block (13) is fixedly connected with two limiting plates (17), rotate between two limiting plates (17) and be connected with extension band pulley (18), regulation band pulley (8), power band pulley (4), first band pulley (2) and second band pulley (3) outside roll connection have sticky tape (19), casing (1) outer wall one side fixedly connected with first backup pad (20), first backup pad (20) top fixedly connected with first motor (21), first motor (21) output shaft top and power band pulley (4) fixed connection.

2. The retractable belt conveyor for the efficient coal gangue separation device of claim 1, wherein: the utility model discloses a bearing frame, including casing (1), locating piece (22), drive piece (24), bearing frame (7), lead screw (23), locating piece (22) are run through to casing (1) outer wall both sides equal fixedly connected with locating piece (22), lead screw (23) outside threaded connection has drive block (24), drive block (24) and bearing frame (7) fixed connection, casing (1) outer wall both sides equal fixedly connected with second backup pad (25), second backup pad (25) top fixedly connected with second motor (26), second motor (26) output shaft top fixedly connected with first gear (27), first gear (27) top meshing has second gear (28), second gear (28) and lead screw (23) run through locating piece (22) one end fixed connection.

3. The retractable belt conveyor for the efficient coal gangue separation device of claim 1, wherein: casing (1) and extension rod (16) top are all opened first rectangular hole (29) that are linear array and distribute, threaded hole (30) are opened to first rectangular hole (29) both sides, first rectangular hole (29) inside sliding connection has T shaped plate (31), T shaped plate (31) bottom surface and casing (1) top surface laminating, second rectangular hole (32) have all been opened at T shaped plate (31) both ends.

4. The retractable belt conveyor for the efficient coal gangue separation device of claim 3, wherein: the novel bolt is characterized in that a rectangular block (33) is slidably connected inside the second rectangular hole (32), one end of the rectangular block (33) is far away from a positioning plate (34) fixedly connected with the rectangular hole, two symmetrically distributed cylindrical holes (35) penetrate through the positioning plate (34), a bolt is slidably connected inside the cylindrical holes (35), and the bolt is in threaded connection with the threaded hole (30).

5. The retractable belt conveyor for the efficient coal gangue separation device of claim 3, wherein: the top of the T-shaped plate (31) is provided with a plurality of spherical holes (36) distributed in a linear array, the inside of each spherical hole (36) is connected with a ball (37) in a rolling manner, and the balls (37) are attached to the adhesive tape (19).

6. The retractable belt conveyor for the efficient coal gangue separation device of claim 3, wherein: the height of the T-shaped plate (31) connected with the first rectangular hole (29) in the extension rod (16) in a sliding mode is larger than that of the T-shaped plate (31) connected with the first rectangular hole (29) in the shell (1) in a sliding mode, and the top surface of the T-shaped plate (31) installed on the extension rod (16) and the top surface of the T-shaped plate (31) installed on the shell (1) are located on the same plane.