Telescopic belt conveyor for underground coal mine transportation

Abstract

The invention discloses a telescopic belt conveyor for coal mine underground transportation, and relates to the technical field of coal mine underground roadway driving face transportation. The invention relates to a telescopic belt conveyor for underground coal mine transportation, which comprises a machine head part, a belt storage bin, a machine body, a middle frame, a machine tail part, a conveying belt and a matched electric controller, the machine head part consists of a coal unloading frame, a machine head frame and a driving device, and the belt storage bin is positioned between the machine head part and the machine body; the belt storage bin is composed of a belt storage bogie, a turnabout drum, a belt storage bin frame, a carrier roller trolley, a traveling trolley, a tensioning winch and a tensioning device, the middle frame is located between the belt storage bin and the machine tail part, the middle frame is formed by integrally connecting H frames and longitudinal beams one by one, and the machine tail part is composed of a rail frame, an elastic carrier roller and a machine tail drum used for guiding. The elastic carrier roller is installed at the feeding position of the telescopic belt conveyor for underground coal mine transportation, and the telescopic belt conveyor for underground coal mine transportation enables a conveying belt to have telescopic performance.

Description

Technical Field

[0001] The invention relates to the technical field of transportation of underground coal mine tunnel excavation working faces, in particular to a telescopic belt conveyor for underground coal mine transportation. Background Art

[0002] Telescopic belt conveyor for underground transportation in coal mines is mainly used for 3.5-4.5m thick coal seam fully mechanized mining face chute transportation in coal mines, and can be used in conjunction with chute transfer machine. Because it is safe and reliable to use in coal mines, has excellent performance, and is easy to install, and the body is retractable during use, it can be extended or shortened with the continuous change of excavation distance, which greatly improves the coal mining efficiency. Therefore, it is well received by coal mine users and widely used in the transportation system of coal mines.

[0003] The conveyor belt of the telescopic belt conveyor used for underground transportation in coal mines is generally equipped with a cleaning brush plate for cleaning. However, after the conveyor belt is adjusted by the correction mechanism, a gap may be generated between the cleaning brush plate and the conveyor belt, resulting in a decrease in the cleaning ability. Therefore, a telescopic belt conveyor for underground transportation in coal mines is urgently needed to solve the above-mentioned problem. Summary of the invention

[0004] The object of the present invention is to provide a telescopic belt conveyor for underground transportation in coal mines to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A telescopic belt conveyor for underground transportation in coal mines, comprising a head, a belt storage bin, a body, an intermediate frame, a tail, a conveyor belt and a matching electric control;

[0006] The head portion of the machine is composed of a coal unloading frame, a head frame and a driving device;

[0007] The belt storage bin is located between the head and the fuselage, and is composed of a belt storage bogie, a redirecting roller, a belt storage bin frame, a roller trolley, a traveling trolley, a tensioning winch and a tensioning device;

[0008] The intermediate frame is located between the belt storage bin and the tail of the machine, and the intermediate frame is formed by connecting the H frame and the longitudinal beams one by one;

[0009] The tail part of the machine is composed of a track frame, elastic rollers and a tail roller for guiding. The elastic rollers are installed at the feeding part of the telescopic belt conveyor for underground transportation in coal mines.

[0010] As a preferred technical solution of the present invention, the coal unloading rack is located in front of the machine head;

[0011] The front end of the coal unloading rack is provided with an unloading roller wound around a conveyor belt;

[0012] The coal unloading rack is provided with an unloading arm for facilitating unloading of the load;

[0013] A cleaning device for removing the broken coal stuck on the conveyor belt after unloading is arranged under the unloading roller.

[0014] The head frame is connected to the coal unloading frame in front and the driving device in the side;

[0015] The head frame is composed of a frame body and two transmission rollers wound around the conveyor belt, and one of the transmission rollers is driven by a reducer of a driving device;

[0016] A cleaning scraper is installed between the two transmission rollers to ensure reliable transmission of the head frame and reduce wear of the conveyor belt;

[0017] The outer sides of the two transmission rollers are covered with rubber;

[0018] A belt storage bin is provided behind the head frame.

[0019] The coal unloading frame is movably hinged to the machine head frame through a hinge, and a through slot for placing the unloading roller is provided at the front of the coal unloading frame;

[0020] Telescopic columns are symmetrically embedded on both sides of the front of the through slot, and the output ends of the telescopic columns are fixedly connected with adjustment plates for facing the conveyor belt;

[0021] A connected flower groove and a spring groove are provided inside the end of the unloading roller, a flower disc is slidably inserted inside the flower groove, a spring is fixedly connected between the flower disc and the spring groove, an outer shaft extending out of the unloading roller is fixedly connected to the side of the flower disc away from the spring, a spherical connector is fixedly connected to the outer end of the outer shaft, a ball groove is provided on the outer side of the spherical connector, and a ball is slidably mounted on the ball groove;

[0022] The two ends of the unloading drum are provided with bearing seats with sliding insertion slots, and the output end of the bearing seat is fixedly connected with a spherical connection cover, and the spherical connection cover is connected to the spherical connector through a ball sliding cover;

[0023] A cylinder fixedly connected to the coal unloading frame is arranged at the front side of the bearing seat, and a sleeve is fixedly connected to the output end of the cylinder, and the sleeve is movably connected to the output end of the bearing seat through a bearing.

[0024] The unloading arm comprises a crossbeam fixedly connected to the head frame, and both ends of the crossbeam are respectively hinged with telescopic rods through a rotating shaft, and one end of the telescopic rod away from the crossbeam is hinged to the coal unloading frame through a rotating shaft;

[0025] The crushed coal cleaning device comprises two symmetrical side plates, one side of the two side plates being fixedly connected with a slider, and the side of the slider being fixedly connected with a tension spring;

[0026] A first roller is fixedly connected between the ends of the two side plates, and two second rollers are movably connected between the middle parts of the two side plates via a rotating shaft. A gear is fixedly sleeved on the end of each second roller, and adjacent gears are meshed.

[0027] A rope groove corresponding to the output end of the bearing seat is opened on the side of the second roller at the front side, and a rope belt is sleeved on the rope groove and the output end of the bearing seat;

[0028] The two side plates are butted against each other on their opposite sides with mounting plates, the inner surface of the mounting plates is provided with a toggle groove adapted to plug in the slider, and the tension spring is fixedly connected to the toggle groove;

[0029] The outer front end of the mounting plate is movably connected to a connecting arm via a rotating shaft, and the upper end of the connecting arm is fixedly connected to the coal unloading frame;

[0030] An adjustment groove is provided at the rear end of the outer surface of the mounting plate, a movable part is slidably inserted in the adjustment groove, and an adjustment screw rod penetrating the coal unloading frame is fixedly connected to the upper side of the movable part;

[0031] The first roller and the second roller on the front side are jointly sleeved with a first belt, and the first roller and the second roller on the rear side are jointly sleeved with a second belt. The outer side of the first belt is evenly and evenly fixedly connected with straight teeth, and the outer side of the second belt is evenly and evenly fixedly connected with curved teeth, and the straight teeth and the curved teeth are staggered.

[0032] As a preferred technical solution of the present invention, the belt storage bin is formed by connecting a frame and a bracket with bolts, the frame is equipped with a first grooved roller and a first lower roller for supporting the conveyor belt, and the inner side of the bracket is provided with a track for the roller trolley and the traveling trolley to travel;

[0033] Two redirection rollers are installed on the belt storage bogie at the rear of the head of the machine, and the redirection rollers and the rollers of the traveling trolley are connected with the conveyor belt together;

[0034] The pulley block of the traveling trolley corresponds to the pulley block of the tensioning device, and the lower part of the traveling trolley is provided with an anti-climbing hook for preventing the wheels of the traveling trolley from derailing or falling off the track;

[0035] A tensioning winch and a conveying buffer for tension indication are installed at the rear of the belt storage bin;

[0036] The drum of the tensioning winch is hollowly sleeved on the intermediate transmission shaft of the tensioning winch, and the double left and right clutches of the tensioning winch are connected to the drum shaft of the tensioning winch by splines.

[0037] The intermediate frame is provided with a second grooved roller and a second lower roller for supporting the conveyor belt.

[0038] The track frame is supported on a skid;

[0039] The tail drum is mounted on two skids;

[0040] A cleaning mechanism for cleaning the scattered coal dust on the conveyor belt is arranged in front of the tail drum.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] (1) A telescopic belt conveyor for underground transportation in coal mines. When the traveling trolley moves toward one end of the tail of the machine, the conveyor belt enters the belt storage bin and the tail of the machine retracts; otherwise, the tail of the machine extends, thereby making the conveyor belt telescopic.

[0043] (2) A telescopic belt conveyor for underground transportation in coal mines. The cylinder drives the bearing seat to move forward and backward to adjust the axial position of the unloading roller, thereby correcting the deviation of the conveyor belt. Through the movable connection of the spherical connector and the spherical connection cover, the cylinders on both sides can be adjusted to perform translation and tilt adjustments on the unloading roller, thereby improving the flexibility of correcting the conveyor belt and being able to cope with various conveyor belt deviation situations.

[0044] (3) A telescopic belt conveyor for underground transportation in coal mines. The load brought by the conveyor belt is unloaded through the unloading arm, and the conveyor belt returns to the driving roller through the unloading roller, which is convenient for unloading the load. The coal unloading frame is hinged to the head frame through a hinge. The deflection angle of the coal unloading frame can be changed by extending and retracting the telescopic rod, thereby changing the unloading rate and improving the flexibility of unloading the load.

[0045] (4) A telescopic belt conveyor for underground transportation of coal in a coal mine, wherein the output end of a bearing seat and a second roller at the front side are connected by a rope, thereby extending the conveying power of the unloading roller to the first belt, thereby taking on the load for extended conveying, and through the meshing of gears, the second roller at the rear side rotates in the opposite direction, and the conveyor belt is cleaned by the curved teeth, thereby improving the recovery rate of the broken coal cleaning.

[0046] (5) A telescopic belt conveyor for underground transportation in coal mines, which utilizes the power of an unloading roller to perform extended transportation and clean up broken coal, thereby saving energy.

[0047] (6) A telescopic belt conveyor for underground transportation in coal mines, which is designed with a tooth comb of straight teeth and curved teeth, so that the curved teeth are combed during the interlacing of the curved teeth and the straight teeth, thereby improving the self-cleaning ability and assisting in improving the cleaning quality.

[0048] (7) A telescopic belt conveyor for underground transportation of coal mines, which is connected through an adjusting screw and a coal unloading frame. The height of the telescopic belt conveyor extending out of the coal unloading frame can be adjusted by rotating the adjusting screw. Furthermore, the angle of the crushed coal cleaning device can be adjusted by articulating the connecting arm and the mounting plate to make it fit the conveyor belt, thereby improving the adjustability, being flexible in use, and improving the adaptability.

[0049] (8) A telescopic belt conveyor for underground transportation of coal mines. When the unloading roller is adjusted to correct the conveyor belt, the slider slides along the toggle groove driven by the rope belt, thereby driving the broken coal cleaning device to be adjusted together, thereby improving the linkage. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the layout of the telescopic belt conveyor for underground transportation in coal mines;

[0051] Figure 2 It is a schematic diagram of the machine head of the present invention;

[0052] Figure 3 This is a schematic diagram of a tape storage bin of the present invention;

[0053] Figure 4 It is a schematic diagram of the intermediate frame of the present invention;

[0054] Figure 5 It is a schematic diagram of the tail of the machine of the present invention;

[0055] Figure 6 This is a schematic plan view of the tape storage bin of the present invention;

[0056] Figure 7 It is a schematic plan view of the intermediate frame of the present invention;

[0057] Figure 8 It is a schematic diagram of the conveyor belt of the present invention;

[0058] Fig. 9 This is a schematic diagram of the coal unloading rack of the present invention;

[0059] Fig.10 For the present invention Fig. 9 A magnified schematic diagram of point A;

[0060] Fig.11 For the present invention Fig. 9 An enlarged schematic diagram of point B;

[0061] Fig.12 This is a schematic diagram of the unloading roller of the present invention;

[0062] Fig.13 This is a schematic diagram of the docking of the unloading roller of the present invention;

[0063] Fig.14 It is a schematic diagram of the unloading arm of the present invention;

[0064] Fig.15 It is a schematic diagram of the crushed coal cleaning device of the present invention;

[0065] Fig.16 This is a schematic diagram of the connection of the crushed coal cleaning device of the present invention;

[0066] Fig.17 It is a schematic diagram of the gear of the present invention;

[0067] Fig.18 It is a schematic diagram of the curved teeth of the present invention;

[0068] Fig.19 It is a schematic diagram of the rope connection of the present invention.

[0069] In the figure: 1, machine head; 101, coal unloading frame; 102, machine head frame; 103, driving device; 104, unloading roller; 105, unloading arm; 106, broken coal cleaning device; 107, through slot; 108, telescopic column; 109, adjustment plate; 110, flower slot; 111, spring slot; 112, flower plate; 113, spring; 114, outer shaft; 115, ball connector; 116, ball groove; 11 7. Ball bearing; 118. Bearing seat; 119. Spherical connecting cover; 120. Cylinder; 121. Snares; 122. Crossbeam; 123. Telescopic rod; 124. Side plate; 125. Slider; 126. Tension spring; 127. First roller column; 128. Second roller column; 129. Gear; 130. Rope groove; 131. Rope belt; 132. Mounting plate; 133. Toggle groove; 134. Connecting arm; 135. Adjustment 1. slot; 136. movable part; 137. adjusting screw; 138. first belt; 139. second belt; 140. straight teeth; 141. curved teeth; 142. frame; 143. driving roller; 144. cleaning scraper; 2. belt storage bin; 201. belt storage bogie; 202. redirecting roller; 203. belt storage bin frame; 204. roller trolley; 205. traveling trolley; 206. tensioning winch; 207 , tensioning device; 208, frame; 209, bracket; 210, first trough roller; 211, first lower roller; 212, track; 3, fuselage; 4, intermediate frame; 401, H frame; 402, longitudinal beam; 403, second trough roller; 404, second lower roller; 5, tail; 501, track frame; 502, elastic roller; 503, tail roller; 504, cleaning mechanism; 6, conveyor belt. DETAILED DESCRIPTION

[0070] 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.

[0071] Example: See Figure 1-Figure 19A telescopic belt conveyor for underground transportation in coal mines, comprising a head 1, a belt storage bin 2, a body 3, an intermediate frame 4, a tail 5, a conveyor belt 6 and a matching electric control, wherein the body 3 is a telescopic part, the tail 5 is a movable part, and the rest are fixed parts;

[0072] The head 1 is composed of a coal unloading frame 101, a head frame 102 and a driving device 103;

[0073] The belt storage bin 2 is located between the head 1 and the fuselage 3. The belt storage bin 2 is composed of a belt storage bogie 201, a redirecting roller 202, a belt storage bin frame 203, a roller trolley 204, a traveling trolley 205, a tensioning winch 206 and a tensioning device 207. When the telescopic belt conveyor for underground transportation in a coal mine is retracted, the conveyor belt 6 can be temporarily stored in the belt storage bin 2;

[0074] The middle frame 4 is located between the belt storage bin 2 and the tail section 5, and the middle frame 4 is formed by connecting the H frame 401 and the longitudinal beam 402 one by one;

[0075] The tail part 5 is composed of a track frame 501, elastic rollers 502 and a tail drum 503 for guiding. Except for the tail drum 503 and the elastic rollers 502, the rest of the tail part 5 are steel welded parts. When the working surface floor is uneven, the tail angle can be adjusted. The elastic rollers 502 are installed at the feeding place of the telescopic belt conveyor for underground transportation in coal mines to protect the conveyor belt 6 and extend the service life of the conveyor belt 6.

[0076] The coal unloading rack 101 is at the front of the machine head 1;

[0077] The front end of the coal unloading rack 101 is provided with an unloading roller 104 which is wound around the conveyor belt 6;

[0078] The coal unloading rack 101 extends with an unloading arm 105 for facilitating unloading of the load;

[0079] A cleaning device 106 is provided under the unloading drum 104 for removing the broken coal stuck on the conveyor belt 6 after unloading.

[0080] The head frame 102 is connected to the coal unloading frame 101 in front and to the driving device 103 at the side;

[0081] The head frame 102 is composed of a frame body 142 and two transmission rollers 143 wound around the conveyor belt 6, and one transmission roller 143 is driven by a reducer of the driving device 103;

[0082] The driving device 103 is composed of a motor, a coupling and a reducer, and the motor and the reducer are connected through a coupling;

[0083] A cleaning scraper 144 is installed between the two driving rollers 143 to ensure reliable transmission of the head frame 102 and reduce wear of the conveyor belt;

[0084] The outer sides of the two driving rollers 143 are covered with rubber to increase the friction with the conveyor belt;

[0085] The head frame 102 has a storage compartment 2 at the rear.

[0086] The coal unloading frame 101 is hingedly connected to the head frame 102, and a through slot 107 for placing the unloading roller 104 is provided at the front of the coal unloading frame 101;

[0087] Telescopic columns 108 are symmetrically embedded on both sides of the front of the through slot 107, and an adjustment plate 109 for facing the conveyor belt 6 is fixedly connected to the output end of the telescopic column 108;

[0088] A connected flower groove 110 and a spring groove 111 are provided inside the end of the unloading roller 104, a flower disc 112 is slidably inserted inside the flower groove 110, a spring 113 is fixedly connected between the flower disc 112 and the spring groove 111, an outer shaft 114 extending out of the unloading roller 104 is fixedly connected to the side of the flower disc 112 away from the spring 113, a ball connector 115 is fixedly connected to the outer end of the outer shaft 114, a ball groove 116 is provided on the outer side of the ball connector 115, and a ball 117 is slidably mounted on the ball groove 116;

[0089] The two ends of the unloading roller 104 are provided with bearing seats 118 that are slidably inserted into the through grooves 107. The output end of the bearing seat 118 is fixedly connected with a spherical connection cover 119. The spherical connection cover 119 is slidably covered with a spherical connector 115 through a ball 117.

[0090] A cylinder 120 fixedly connected to the coal unloading frame 101 is arranged at the front side of the bearing seat 118, and a sleeve 121 is fixedly connected to the output end of the cylinder 120, and the sleeve 121 is movably connected to the output end of the bearing seat 118 through a bearing.

[0091] The unloading arm 105 includes a crossbeam 122 fixedly connected to the head frame 102, and both ends of the crossbeam 122 are respectively hinged with telescopic rods 123 through a rotating shaft, and one end of the telescopic rod 123 away from the crossbeam 122 is hinged to the coal unloading frame 101 through a rotating shaft;

[0092] The crushed coal cleaning device 106 includes two symmetrical side plates 124, and a slider 125 is fixedly connected to the opposite sides of the two side plates 124, and a tension spring 126 is fixedly connected to the side of the slider 125;

[0093] A first roller 127 is fixedly connected between the ends of the two side plates 124, and two second rollers 128 are movably connected between the middle parts of the two side plates 124 via a rotating shaft. A gear 129 is fixedly sleeved at the end of each second roller 128, and adjacent gears 129 are meshed.

[0094] A rope groove 130 corresponding to the output end of the bearing seat 118 is formed on the side of the second roller 128 at the front side, and a rope belt 131 is sleeved together between the rope groove 130 and the output end of the bearing seat 118;

[0095] The two side plates 124 are connected to mounting plates 132 on opposite sides. The inner surface of the mounting plates 132 is provided with a toggle groove 133 adapted to insert the slider 125. The tension spring 126 is fixedly connected to the toggle groove 133.

[0096] The outer front end of the mounting plate 132 is movably connected to a connecting arm 134 via a rotating shaft, and the upper end of the connecting arm 134 is fixedly connected to the coal unloading frame 101;

[0097] An adjustment slot 135 is provided at the rear end of the outer surface of the mounting plate 132. A movable member 136 is slidably inserted into the adjustment slot 135. An adjustment screw rod 137 penetrating the coal unloading frame 101 is fixedly connected to the upper side of the movable member 136.

[0098] The first roller 127 and the second roller 128 on the front side are jointly sleeved with a first belt 138, and the first roller 127 and the second roller 128 on the rear side are jointly sleeved with a second belt 139. Straight teeth 140 are evenly and evenly fixedly connected to the outer side of the first belt 138, and curved teeth 141 are evenly and evenly fixedly connected to the outer side of the second belt 139. The density of the straight teeth 140 is less than that of the curved teeth 141, and the straight teeth 140 and the curved teeth 141 are staggered.

[0099] The belt storage bin 2 is formed by bolting a frame 208 and a bracket 209. The frame 208 is provided with a first grooved roller 210 and a first lower roller 211 for supporting the conveyor belt 6. The inner side of the bracket 209 is provided with a track 212 for the roller trolley 204 and the traveling trolley 205 to travel.

[0100] Two redirecting rollers 202 are mounted on the belt storage bogie 201 at the rear of the head 1. The redirecting rollers 202 and the rollers of the traveling trolley 205 are connected together with the conveyor belt 6 to provide reciprocating guidance for the conveyor belt 6 in the belt storage bin 2. The redirecting rollers 202 are fixed-axis type and are used for reversing the belt storage bin 2 and the tail 5.

[0101] The roller trolley 204 is composed of a frame and wheels. Its function is to support the conveyor belt 6 when the belt is stored in the belt storage bin 2 so that its overhang is not too large. The roller trolley 204 moves with the traveling trolley 205 and needs to be pulled out or withdrawn by manpower.

[0102] The traveling trolley 205 is composed of a frame, a roller, a pulley block and a wheel. The pulley block of the traveling trolley 205 corresponds to the pulley block of the tensioning device 207. By moving the traveling trolley 205, it is prevented from being lifted when it is subjected to force and the body is stable, thereby preventing the conveyor belt 6 on the roller of the traveling trolley 205 from running off the track. The lower part of the traveling trolley 205 is equipped with a climbing stop hook for preventing the wheels of the traveling trolley 205 from derailing or falling off the track. When the traveling trolley 205 moves forward, the conveyor belt 6 is released and the fuselage 3 is extended; when the traveling trolley 205 moves backward, the conveyor belt 6 is stored and the fuselage 3 is shortened;

[0103] By tightening the traveling trolley 205 through the wire rope of the tensioning winch 206, the conveyor belt 6 can be properly tensioned;

[0104] The rear part of the belt storage bin 2 is equipped with a tension winch 206 and a conveying buffer for tension indication. The function of the conveying buffer is to keep the conveying belt 6 always at a certain tension when the telescopic belt conveyor for underground coal mine transportation is started, so as to reduce the droop of the conveying belt 6 and the flapping between layers;

[0105] The tensioning winch 206 includes a motor, a sleeve coupling, a drum, a worm gear reducer, an intermediate transmission shaft, a pair of cylindrical gears and a double left and right clutch. The drum of the tensioning winch 206 is loosely mounted on the intermediate transmission shaft of the tensioning winch 206. The double left and right clutches of the tensioning winch 206 are connected to the drum shaft of the tensioning winch 206 by splines. A set of operating mechanisms (including handles, screws, nuts, and toggle rods) can be used to place the double left and right clutches of the tensioning winch 206 in the transmission or braking position.

[0106] The intermediate frame 4 is the main operating part of the telescopic belt conveyor for underground transportation in coal mines. The intermediate frame 4 is provided with a second trough roller 403 and a second lower roller 404 for supporting the conveyor belt 6. The intermediate frame 4 adopts an open pipe boltless structure, which has the advantages of convenient hanging and easy disassembly and assembly. The trough angle of the second trough roller 403 changes with the load, which has a certain effect on reducing impact vibration, increasing the transportation volume and reducing the deviation of the conveyor belt 6. As the working surface advances, the intermediate frame 4 can be dismantled or lengthened section by section at the end connected to the tail 5 of the machine.

[0107] The track frame 501 is supported on a skid, making it easy to move;

[0108] The tail roller 503 is mounted on two skids to support the conveyor belt;

[0109] A cleaning mechanism 504 is provided in front of the tail drum 503 for cleaning the scattered coal dust on the conveyor belt 6;

[0110] The tail section 5 is mainly used to receive the load sent by the transfer machine and transport it out, and the conveyor belt 6 returns from here;

[0111] The first grooved roller 210 and the second grooved roller 403 are used for conveying bulk materials.

[0112] The working principle of the present invention is as follows:

[0113] The transmission principle of the telescopic belt conveyor for underground transportation in coal mines is the same as that of ordinary belt conveyors. Both are continuous transportation equipment that uses the conveyor belt 6 as a traction and bearing mechanism. Compared with ordinary belt conveyors, it has an additional belt storage bin 2. Figure 1 As shown, when the traveling trolley 205 moves toward one end of the tail portion 5, the conveyor belt 6 enters the belt storage bin 2 and the tail portion 5 retracts; otherwise, the tail portion 5 extends, thereby making the conveyor belt 6 retractable.

[0114] By driving the bearing seat 118 to move forward and backward through the cylinder 120, the axial position of the unloading roller 104 can be adjusted, thereby correcting the deviation of the conveyor belt 6. Through the movable connection between the spherical connector 115 and the spherical connecting cover 119, the cylinders 120 on both sides can be adjusted to perform translation and tilt adjustments on the unloading roller 104, thereby improving the flexibility of correcting the conveyor belt 6 and being able to cope with various deviation situations of the conveyor belt 6.

[0115] The load brought by the conveyor belt 6 is unloaded through the unloading arm 105, and the conveyor belt 6 returns to the driving roller 143 through the unloading roller 104, which is convenient for unloading the load. The coal unloading frame 101 is hinged to the head frame 102 through a hinge. Through the extension and retraction of the telescopic rod 123, the deflection angle of the coal unloading frame 101 can be changed, thereby changing the unloading rate and improving the flexibility of unloading the load.

[0116] The output end of the bearing seat 118 and the second roller 128 on the front side are connected by a rope 131, so that the conveying power of the unloading roller 104 is extended to the first belt 138, thereby taking over the load for extended conveying, and through the engagement of the gear 129, the second roller 128 on the rear side rotates in the opposite direction, and the curved teeth 141 are used to clean the conveyor belt 6, thereby improving the recovery rate of the crushed coal cleaning.

[0117] The power of the unloading drum 104 is utilized for extended transportation and cleaning of broken coal, thus saving energy.

[0118] By means of the tooth comb design of the straight teeth 140 and the curved teeth 141 , the curved teeth 141 are combed during the interlacing process of the curved teeth 141 and the straight teeth 140 , thereby improving the self-cleaning ability and assisting in improving the cleaning quality.

[0119] By adjusting the through connection between the screw 137 and the coal unloading frame 101, the height of the coal unloading frame 101 can be adjusted by rotating the adjusting screw 137, and then the angle of the crushed coal cleaning device 106 can be adjusted by the hinge of the connecting arm 134 and the mounting plate 132 to make it fit the conveyor belt 6, thereby improving the adjustability, flexibility of use, and improved adaptability.

[0120] When the unloading roller 104 is adjusted to correct the conveyor belt 6, the slider 125 is driven by the rope belt 131 to slide along the toggle groove 133, thereby driving the crushed coal cleaning device 106 to adjust together, thereby improving the linkage.

[0121] 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 telescopic belt conveyor for underground coal mine transportation, comprising a head portion (1), a belt storage bin (2), a body (3), an intermediate frame (4), a tail portion (5), a conveyor belt (6) and a matching electric control; Features: The head portion (1) is composed of a coal unloading frame (101), a head frame (102) and a driving device (103); The belt storage bin (2) is located between the machine head (1) and the machine body (3), and the belt storage bin (2) is composed of a belt storage bogie (201), a redirecting roller (202), a belt storage bin frame (203), a roller trolley (204), a traveling trolley (205), a tensioning winch (206) and a tensioning device (207); The intermediate frame (4) is located between the belt storage bin (2) and the tail portion (5), and the intermediate frame (4) is formed by connecting the H frame (401) and the longitudinal beam (402) one by one. The tail part (5) is composed of a track frame (501), an elastic roller (502) and a tail roller (503) for guiding. The elastic roller (502) is installed at the feeding part of the telescopic belt conveyor for underground transportation in coal mines.

2. A telescopic belt conveyor for underground coal mine transportation according to claim 1, characterized in that: The coal unloading rack (101) is located in front of the machine head (1); The front end of the coal unloading rack (101) is provided with an unloading roller (104) wound around a conveyor belt (6); The coal unloading frame (101) is provided with an unloading arm (105) for facilitating unloading of loads; A cleaning device (106) for removing the broken coal stuck on the conveyor belt (6) after unloading is provided under the unloading roller (104).

3. A telescopic belt conveyor for underground coal mine transportation according to claim 2, characterized in that: The head frame (102) is connected to the coal unloading frame (101) in front and to the driving device (103) at the side; The head frame (102) is composed of a frame body (142) and two transmission rollers (143) wound around a conveyor belt (6), and one of the transmission rollers (143) is driven by a reducer of the driving device (103); A cleaning scraper (144) is installed between the two driving rollers (143) to ensure reliable transmission of the head frame (102) and reduce wear of the conveyor belt; The outer sides of the two transmission rollers (143) are covered with rubber; The head frame (102) is connected to a belt storage bin (2) at the rear.

4. A telescopic belt conveyor for underground coal mine transportation according to claim 3, characterized in that: The coal unloading frame (101) is movably hinged to the machine head frame (102) through a hinge, and a through slot (107) for placing the unloading roller (104) is provided at the front of the coal unloading frame (101); Telescopic columns (108) are symmetrically embedded on both sides of the front of the through slot (107), and an adjustment plate (109) for facing the conveyor belt (6) is fixedly connected to the output end of the telescopic column (108); A connected flower groove (110) and a spring groove (111) are provided inside the end of the unloading roller (104); a flower disc (112) is slidably inserted inside the flower groove (110); a spring (113) is fixedly connected between the flower disc (112) and the spring groove (111); an outer shaft (114) extending out of the unloading roller (104) is fixedly connected to the side of the flower disc (112) away from the spring (113); a spherical connector (115) is fixedly connected to the outer end of the outer shaft (114); a ball groove (116) is provided on the outer side of the spherical connector (115); a ball (117) is slidably mounted on the ball groove (116); The two ends of the unloading roller (104) are provided with bearing seats (118) that are slidably inserted into the through grooves (107); the output end of the bearing seat (118) is fixedly connected with a spherical connection cover (119); the spherical connection cover (119) is slidably covered with a spherical connector (115) via a ball (117); A cylinder (120) fixedly engaged with the coal unloading frame (101) is arranged at the front side of the bearing seat (118); a sleeve (121) is fixedly connected to the output end of the cylinder (120); and the sleeve (121) is movably connected to the output end of the bearing seat (118) via a bearing.

5. The telescopic belt conveyor for underground coal mine transportation according to claim 4, characterized in that: The unloading arm (105) comprises a crossbeam (122) fixedly connected to the head frame (102), and both ends of the crossbeam (122) are respectively hinged with telescopic rods (123) through a rotating shaft, and one end of the telescopic rod (123) away from the crossbeam (122) is hinged to the coal unloading frame (101) through a rotating shaft.

6. The telescopic belt conveyor for underground coal mine transportation according to claim 5, characterized in that: The crushed coal cleaning device (106) comprises two symmetrical side plates (124), and a slider (125) is fixedly connected to the opposite sides of the two side plates (124), and a tension spring (126) is fixedly connected to the side of the slider (125); A first roller (127) is fixedly connected between the ends of the two side plates (124), and two second rollers (128) are movably connected between the middle parts of the two side plates (124) via a rotating shaft. A gear (129) is fixedly sleeved on the end of each second roller (128), and adjacent gears (129) are meshed. A rope groove (130) corresponding to the output end of the bearing seat (118) is provided on the side of the second roller (128) at the front side, and the rope groove (130) and the output end of the bearing seat (118) are sleeved with a rope belt (131); The two side plates (124) are respectively connected to mounting plates (132) on opposite sides thereof, and the inner surface of the mounting plates (132) is provided with a toggle groove (133) adapted to fit the plug-in slider (125), and the tension spring (126) is fixedly connected to the toggle groove (133); The outer front end of the mounting plate (132) is movably connected to a connecting arm (134) via a rotating shaft, and the upper end of the connecting arm (134) is fixedly connected to the coal unloading frame (101); An adjusting groove (135) is provided at the rear end of the outer surface of the mounting plate (132), a movable part (136) is slidably inserted in the adjusting groove (135), and an adjusting screw rod (137) penetrating the coal unloading frame (101) is fixedly connected to the upper side of the movable part (136); The first roller (127) and the second roller (128) on the front side are jointly sleeved with a first belt (138), and the first roller (127) and the second roller (128) on the rear side are jointly sleeved with a second belt (139), the outer side of the first belt (138) is evenly and evenly fixedly connected with straight teeth (140), and the outer side of the second belt (139) is evenly and evenly fixedly connected with curved teeth (141), and the straight teeth (140) and the curved teeth (141) are staggered.

7. The telescopic belt conveyor for underground coal mine transportation according to claim 1, characterized in that: The belt storage bin (2) is formed by a frame (208) and a bracket (209) connected by bolts, the frame (208) is provided with a first grooved roller (210) and a first lower roller (211) for supporting the conveyor belt (6), and the inner side of the bracket (209) is provided with a track (212) for the roller trolley (204) and the traveling trolley (205) to travel; Two redirecting rollers (202) are mounted on the belt storage bogie (201) at the rear of the head (1), and the redirecting rollers (202) and the rollers of the traveling trolley (205) are connected together with the conveyor belt (6); The pulley block of the traveling trolley (205) corresponds to the pulley block of the tensioning device (207), and the lower part of the traveling trolley (205) is provided with a climbing prevention hook for preventing the wheels of the traveling trolley (205) from derailing or falling off the track; The rear part of the belt storage bin (2) is provided with a tensioning winch (206) and a conveying buffer for tension indication; The drum of the tensioning winch (206) is sleeved on the intermediate transmission shaft of the tensioning winch (206), and the double left and right clutches of the tensioning winch (206) are connected to the drum shaft of the tensioning winch (206) by splines.

8. The telescopic belt conveyor for underground coal mine transportation according to claim 7, characterized in that: The intermediate frame (4) is provided with a second grooved roller (403) and a second lower roller (404) for supporting the conveyor belt (6).

9. The telescopic belt conveyor for underground coal mine transportation according to claim 8, characterized in that: The track frame (501) is supported on a skid; The tail drum (503) is mounted on two skids; A cleaning mechanism (504) for cleaning coal dust scattered on the conveyor belt (6) is provided in front of the tail roller (503).

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