A belt connection device for coal mines underground with a protection function

Abstract

The present invention discloses a belt connection device for coal mines with a protection function, which relates to the technical field of coal mine transportation equipment. A belt connection device for coal mines with a protection function includes a frame. A first sliding frame is slidably connected to the frame. The first sliding frame is slidably connected to a first motor through mounting blocks distributed in a circumferential array. A first rotating rod is fixedly connected to the output shaft of the first motor. A fixed rod is arranged on the first rotating rod. A first friction roller is rotatably connected to the fixed rod. The frame is slidably connected to arc-shaped guide frames distributed in a mirror image through mounting frames. A second friction roller is fixedly connected to the arc-shaped guide frame through a mounting plate. In the present invention, the belt is wound by the cooperation of the first friction roller and the second friction roller, so that the reverse tension force received by the belt is decomposed, the fastening degree of the belt is increased, the whole belt is stretched, and stress concentration at a single point during the stretching process of the belt is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine transportation equipment, and particularly relates to a coal mine underground belt connection device with a protection function. Background Art

[0002] The coal mine belt conveyor is one of the common equipment in the coal mine production process, and it is used to transport coal from the mining site to other places.

[0003] The high friction of materials such as coal on the belt will cause wear on the surface of the belt. The wear of the belt will reduce its strength and durability. In case of overload, external force impact, foreign object puncture, etc., the belt may break, tear or be damaged. In this case, it is necessary to stop the machine to repair the belt of the conveyor to ensure the normal operation of the conveyor and the safe transportation of materials. The repair method is generally to process the two broken ends and then bond them, and remake the belt joint. When replacing the belt of the conveyor, one end of the processed belt needs to be stretched to the other end. At present, most workers use methods such as puncturing to use steel ropes for pulling and moving, which is easy to cause damage to the end of the belt after processing, affecting the belt connection process. During this process, the resistance of the belt is proportional to the length of the belt. If the belt is too long, the force borne by the end of the belt after processing will also increase. The manual pulling efficiency is low, and if the belt suddenly breaks, the pulling inertia of the worker and the strong shock force of the belt will pose a threat to the personal safety of the worker. Summary of the Invention

[0004] The present invention provides a coal mine underground belt connection device with a protection function that can be secondarily fastened to solve the above problems.

[0005] The technical solution of the present invention is: a coal mine underground belt connection device with a protection function, including a frame. The frame is fixedly connected with a first hydraulic push rod through a mounting frame. The frame is slidably connected with a first sliding frame. The telescopic end of the first hydraulic push rod is fixedly connected with the first sliding frame. The first sliding frame is slidably connected with a first motor through circumferentially and arrayedly distributed mounting blocks. The output shaft of the first motor is fixedly connected with a first rotating rod. The first rotating rod is provided with a fixed rod. The fixed rod is rotatably connected with a first friction roller. The first friction roller is fixedly connected with a first sliding block. The first sliding frame is slidably connected with mirror-image distributed arc-shaped guide frames through mounting frames. The arc-shaped guide frames are fixedly connected with second friction rollers through mounting plates. Both the first friction roller and the second friction roller are detachable. The first rotating rod is provided with a locking mechanism. The first sliding frame is provided with a protection mechanism. The frame is provided with mirror-image distributed tensioning mechanisms, and the lower tensioning mechanism can be freely detached.

[0006] Further, the locking mechanism includes a fixed wheel, which is fixedly connected to the adjacent first rotating rod. The fixed wheel is rotatably connected to circumferentially arrayed rotating plates. A torsion spring is provided between the fixed wheel and the adjacent rotating plate. The fixed wheel is rotatably connected to a transmission housing, which is fixedly connected to the adjacent fixed rod. A circumferentially arrayed first limiting plate is fixedly connected inside the transmission housing. The first rotating rod is fixedly connected to a first gear. The first sliding frame is fixedly connected to a first rack through a mounting frame, and the first rack meshes with the adjacent first gear. An arc-shaped guide frame is slidably connected to a transmission frame, and a tension spring is provided between the arc-shaped guide frame and the adjacent transmission frame. The transmission frame is fixedly connected to a first sliding plate. The fixed wheel is slidably connected to a first sliding rod, and the first sliding plate is in limiting sliding fit with the adjacent first sliding rod. The first sliding rod is rotatably connected to a rotating wheel, which is located inside the fixed wheel. The rotating wheel is fixedly connected to circumferentially arrayed second limiting plates, and the rotating plate is in limiting cooperation with the adjacent second limiting plate. The second limiting plate is slidably connected to the adjacent fixed wheel, and a spring is provided between the fixed wheel and the adjacent rotating wheel.

[0007] Further, the protection mechanism includes mirror-image distributed first fixing frames, which are all slidably connected to the first sliding frame. The mirror-image distributed first fixing frames are all provided with mirror-image distributed sliding grooves. A second sliding plate is slidably connected between the sliding grooves corresponding to the mirror-image distributed first fixing frames. The second sliding plate is slidably connected to mirror-image distributed pressing plates, and a spring is provided between the pressing plate and the adjacent second sliding plate. The second sliding plate is fixedly connected to a first fixing block. The first fixing block is slidably connected to a second rack. The first fixing frame close to the first fixing block is slidably connected to a second motor through a mounting frame. The output shaft of the second motor is fixedly connected to a second gear, and the second rack meshes with the second gear. A locking assembly is provided on the first fixing frame far from the first fixing block.

[0008] Further, the sliding groove of the first fixing frame is composed of a vertical sliding groove and an inclined sliding groove, and the distance from the end of the inclined sliding groove of the first fixing frame far from the vertical sliding groove of the adjacent first fixing frame to the center line in the vertical direction of the adjacent first fixing frame is less than the distance from the end of the inclined sliding groove of the first fixing frame close to the vertical sliding groove of the adjacent first fixing frame to the center line in the vertical direction of the adjacent first fixing frame.

[0009] Further, the locking assembly includes a second fixing block fixedly connected to one of the second sliding plates, a synchronizing block fixedly connected to the other second sliding plate, a third rack fixedly connected to the second fixing block, the synchronizing block being slidably connected to the third rack, a synchronizing plate being slidably connected to the first fixing frame away from the second motor, the synchronizing plate being slidably connected to the synchronizing block, a third gear being rotatably connected to the synchronizing plate, a threaded rod being fixedly connected to the first fixing frame away from the second motor through a mounting frame, the threaded rod being threadedly connected to a fourth gear, and the third gear being meshed with the fourth gear.

[0010] Further, the tensioning mechanism includes a second fixing frame fixedly connected to the frame, a second hydraulic push rod fixedly connected to the second fixing frame, a fixing plate fixedly connected to the telescopic end of the second hydraulic push rod, a third motor fixedly connected to the fixing plate through a mounting frame, a fifth gear fixedly connected to the output shaft of the third motor, a circumferentially arrayed fourth rack slidably connected to the fixing plate, the fourth rack being meshed with the fifth gear, a tensioning frame slidably connected to the fixing plate, a second sliding frame slidably connected to the tensioning frame, the fourth rack being fixedly connected to the adjacent second sliding frame, and a spring being provided between the tensioning frame and the adjacent second sliding frame.

[0011] Further, a rolling mechanism is further included, the rolling mechanism being disposed on the fixing plate, the rolling mechanism including mirror-image distributed second sliding blocks, the fixing plate being provided with mirror-image distributed electric slide rails, the mirror-image distributed second sliding blocks being respectively fixedly connected to the sliders in the adjacent electric slide rails of the fixing plate, a third hydraulic push rod being fixedly connected to the second sliding block, a third sliding frame being fixedly connected to the telescopic end of the third hydraulic push rod, the second sliding block being slidably connected to the adjacent third sliding frame, the third sliding frame being slidably connected to mirror-image distributed third sliding blocks, a first pressing roller being rotatably connected to the third sliding block, a first sliding ring being rotatably connected to the first pressing roller, a fourth sliding block being slidably connected to the first sliding ring, the third sliding frame being slidably connected to the fourth sliding block, a second pressing roller being rotatably connected to the fourth sliding block, a first fixing ring being rotatably connected to the second pressing roller, a third pressing roller being rotatably connected to the first fixing ring, a second sliding ring being rotatably connected to the third pressing roller, a fifth sliding block being slidably connected to the second sliding ring, the fifth sliding block being slidably connected to the third sliding frame, a fourth pressing roller being rotatably connected to the fifth sliding block, a second fixing ring being rotatably connected to the fourth pressing roller, and a fifth pressing roller being rotatably connected between the mirror-image distributed second fixing rings, and a flat pressing assembly being provided on the third sliding frame.

[0012] Further, the outer diameters of the first pressing roller, the second pressing roller, the third pressing roller, the fourth pressing roller and the fifth pressing roller are all equal.

[0013] Further, the flat pressing assembly includes cover plates axially and arrayedly distributed. The cover plates axially and arrayedly distributed are all slidably connected to the third sliding frame. A spring is arranged between the cover plates and the third sliding frame. The first pressing roller, the second pressing roller, the third pressing roller, the fourth pressing roller and the fifth pressing roller are respectively in contact and cooperation with adjacent cover plates. The cover plates are fixedly connected with fifth racks. The third sliding frame is rotatably connected with second rotating rods axially and arrayedly distributed through mounting plates. The second rotating rods are fixedly connected with sixth gears. The sixth gears are meshed with adjacent fifth racks. The second rotating rods are fixedly connected with towing ropes penetrating through adjacent cover plates. The towing ropes far from the second sliding block penetrate through the second fixing rings and are fixedly connected with sleeves. The sleeves are slidably matched with adjacent second pressing rollers and adjacent third pressing rollers. The towing ropes close to the second sliding block penetrate through the first fixing rings and are fixedly connected with second sliding rods. The first pressing roller, the first sliding ring, the fourth sliding block and the sleeves are all slidably matched with adjacent second sliding rods. The first fixing rings and the second fixing rings are respectively slidably connected with adjacent towing ropes.

[0014] Further, the elastic coefficient of the spring between the middle cover plate and the third sliding frame is greater than the elastic coefficient of the springs between the cover plates at both ends and the third sliding frame.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention winds the tape by the cooperation of the first friction roller and the second friction roller, so that the reverse tension received by the tape is decomposed, increasing the fastening degree of the tape and stretching the whole tape, preventing stress concentration at a single point during the stretching process of the tape. The first gear cooperates with the adjacent first rack and drives the first friction roller and the second friction roller to move towards each other and clamp, so that two layers of tapes moving in opposite directions lock themselves through the mutual acting force, enhancing the locking effect on the tape. The tensioning frame simultaneously tensions the two glue - applying sections of the tape, keeping the tape in a tensioned state during bonding, improving the quality of the tape after bonding is completed. Through the guiding of the inclined sliding groove of the first fixing frame for the moving path of the second sliding plate, while buffering the kinetic energy of the tape, the fastening degree of the pressing plate on the tape is strengthened, preventing the tape from rebounding and threatening the staff, ensuring the personal safety of the staff. By dividing the mirror - distributed first pressing roller, the mirror - distributed second pressing roller, the mirror - distributed third pressing roller, the mirror - distributed fourth pressing roller and the fifth pressing roller into five different pressure zones, when rolling the tape, the bubbles in the middle binder move to both sides, enhancing the bonding effect of the tape. Through the sleeve and the second sliding rod, the pressure between the tape and the binder is gradually integrated, strengthening the bonding effect of the tape while removing the bubbles mixed in the binder, further enhancing the bonding effect of the tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three - dimensional structural schematic diagram of the present invention;

[0017] Figure 2 is a three - dimensional structural sectional view of the positional relationship between the first sliding frame and the first motor of the present invention;

[0018] Figure 3 is a three - dimensional structural schematic diagram of the positional relationship between the first friction roller and the second friction roller of the present invention;

[0019] Figure 4 is a three - dimensional structural schematic diagram of the present invention when the tape is not yet fastened;

[0020] Figure 5 is a three - dimensional structural schematic diagram of the present invention after the tape is fastened;

[0021] Figure 6 is a three - dimensional structural sectional view of the locking mechanism of the present invention;

[0022] Figure 7 is a three - dimensional structural sectional view of the positional relationship between the arc - shaped guiding frame and the transmission frame of the present invention;

[0023] Figure 8 is a three - dimensional structural sectional view of the positional relationship between the first sliding plate and the first sliding rod of the present invention;

[0024] Figure 9 Schematic three-dimensional structure diagram of the protection mechanism of the present invention;

[0025] Figure 10 Schematic three-dimensional structure sectional view of the positional relationship between the first limiting plate and the first gear of the present invention;

[0026] Figure 11 Schematic three-dimensional structure sectional view of the locking assembly of the present invention;

[0027] Figure 12 Schematic three-dimensional structure sectional view of the tensioning mechanism of the present invention;

[0028] Figure 13 Schematic three-dimensional structure sectional view of the positional relationship between the fixing plate and the second sliding block of the present invention;

[0029] Figure 14 Schematic three-dimensional structure sectional view of the rolling mechanism of the present invention;

[0030] Figure 15 Schematic three-dimensional structure sectional view of the flat pressing assembly of the present invention.

[0031] The labels in the figure are: 1, frame; 2, first hydraulic push rod; 3, first sliding frame; 4, first motor; 5, first rotating rod; 6, fixed rod; 7, first friction roller; 8, first sliding block; 9, arc-shaped guiding frame; 10, second friction roller; 1201, fixed wheel; 1202, rotating plate; 1203, transmission housing; 1204, first limiting plate; 1205, first gear; 1206, first rack; 1207, transmission frame; 1208, first sliding plate; 1209, first sliding rod; 1210, rotating wheel; 1211, second limiting plate; 1301, first fixing frame; 1302, second sliding plate; 1303, pressing plate; 1304, first fixing block; 1305, second rack; 1307, second motor; 1308, second gear; 1309, second fixing block; 13091, synchronizing block; 13092, synchronizing plate; 1310, third rack; 1311, third gear; 1312, threaded rod; 1313, fourth gear; 1401, second fixing frame; 1402, second hydraulic push rod; 1403, fixing plate; 1404, third motor; 1405, fifth gear; 1406, fourth rack; 1407, tensioning frame; 1408, second sliding frame; 1501, second sliding block; 1502, third hydraulic push rod; 1503, third sliding frame; 1504, third sliding block; 1505, first squeezing roller; 1506, first sliding ring; 15061, second sliding ring; 1507, fourth sliding block; 15071, fifth sliding block; 1508, second squeezing roller; 15081, third squeezing roller; 1509, first fixing ring; 15091, second fixing ring; 1510, fourth squeezing roller; 15101, fifth squeezing roller; 1511, cover plate; 1512, fifth rack; 1513, second rotating rod; 1514, sixth gear; 1515, towing rope; 1516, sleeve; 1517, second sliding rod. Specific embodiments

[0032] The following further elaborates on the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0033] Embodiment 1: A belt connection device for coal mines underground with a protection function, as Figures 1-5As shown in the figure, it includes a machine frame 1. On the upper side of the machine frame 1, a first hydraulic push rod 2 for providing power is fixedly connected through a mounting frame. A first sliding frame 3 is slidably connected to the upper side of the machine frame 1. The telescopic end of the first hydraulic push rod 2 is fixedly connected to the left side of the first sliding frame 3. The first sliding frame 3 is slidably connected with a first motor 4 through two mounting blocks distributed in a circumferential array. The output shaft of the first motor 4 is fixedly connected with a first rotating rod 5. The first rotating rod 5 is provided with a fixed rod 6. The fixed rod 6 is rotatably connected with a detachable first friction roller 7. The first friction roller 7 is fixedly connected with a first sliding block 8 for guiding the first friction roller 7. The first sliding frame 3 is slidably connected with two groups of arc-shaped guiding frames 9 distributed in a mirror image through a mounting frame. Each group consists of two arc-shaped guiding frames 9, and the left and right deflection angles of the two arc-shaped guiding frames 9 in each group differ by 180 degrees. The arc-shaped guiding frame 9 is fixedly connected with a detachable second friction roller 10 through a mounting plate. The first friction roller 7 and the second friction roller 10 cooperate with each other to fasten the tape. The first rotating rod 5 is provided with a locking mechanism for strengthening the locking effect on the tape. The first sliding frame 3 is provided with a protection mechanism for preventing the tape from rebounding. The machine frame 1 is provided with two tensioning mechanisms distributed in a mirror image, and the lower tensioning mechanism can be freely disassembled. The tensioning mechanism is used to keep the tape in a tensioned state for bonding.

[0034] When using this device to stretch and bond the conveyor belt, the user first finishes processing the belt and applies glue. The user drives this device to move to the belt bonding position, then passes one end of the belt through the protection mechanism. Subsequently, the user installs the lower tensioning mechanism so that the other end of the belt is located between the two tensioning mechanisms. Then, as Figure 4 shown, the user passes one end of the belt through between the first friction roller 7 and the second friction roller 10. The user temporarily fixes the non-glued part of the belt. Then, the user starts the two first motors 4 simultaneously. Taking the first motor 4 on the front left side as an example, the output shaft of the first motor 4 drives the fixed rod 6 to rotate through the locking mechanism. The fixed rod 6 drives the lower first friction roller 7 to rotate. The first friction roller 7 drives the first sliding block 8 to rotate within the arc-shaped guiding frame 9 until the first friction roller 7 drives the first sliding block 8 and part of the belt to rotate to the end of the arc-shaped guiding frame 9 and triggers the locking mechanism, causing the first rotating rod 5 to stop driving the fixed rod 6 to rotate and locking the fixed rod 6 until the state shown in Figure 5 is formed. Then, the user loosens the belt and simultaneously controls the protection mechanism to lock the belt for the second time. At this time, the clamping is completed. The two first friction rollers 7 and the two second friction rollers 10 cooperate to wind the belt, so that the reverse tension received by the belt is decomposed, increasing the fastening degree of the belt, stretching the whole belt, and preventing stress concentration at a single point during the stretching process of the belt.

[0035] In the process of the first friction roller 7 driving the adhesive tape to rotate, the locking mechanism always drives the first motor 4, the first rotating rod 5, the first friction roller 7, the arc-shaped guide frame 9, the second friction roller 10 and the adhesive tape to move to the right. Similarly, the rear locking mechanism always drives the first motor 4, the first rotating rod 5, the first friction roller 7, the arc-shaped guide frame 9, the second friction roller 10 and the right part of the adhesive tape to move to the left. Figure 5 As shown, until the two first friction rollers 7 and the two second friction rollers 10 cooperate with each other to clamp the conveyor belt, the user then stops the two first motors 4 at the same time, and the clamping is completed at this time.

[0036] After the locking mechanism locks the tape, the user controls the telescopic end of the first hydraulic push rod 2 to extend, and the telescopic end of the first hydraulic push rod 2 drives the two first friction rollers 7 and the two second friction rollers 10 and the tape to move to the right through the first sliding frame 3, until the glue-coated section of the tape moves to the right to correspond to the glue-coated section of the tape held up by the tensioning mechanism, and then the user bonds the tape. After the tape is bonded, the user controls the tensioning mechanism to tension the bonding section of the tape to a state where the tape works normally, and waits for the tape to be bonded.

[0037] When the telescopic end of the first hydraulic push rod 2 drives the two first friction rollers 7 and the two second friction rollers 10 and the adhesive tape to move to the right, if the first friction roller 7 and the two second friction rollers fail and lose the fastening of the adhesive tape, the adhesive tape will slip out to the left due to the reaction force, and trigger the protection mechanism to perform secondary locking of the adhesive tape and buffer the driving energy of the adhesive tape.

[0038] After the tape is bonded, the user controls the tensioning mechanism to loosen the tape, and then the user controls the two first motors 4 to reverse until the two first friction rollers 7 are reset. Then the user removes the two first friction rollers 7 and the two second friction rollers 10, and controls the protection mechanism to stop clamping the tape. Then the tensioning mechanism on the lower side is removed, and the user moves the device out from above the tape. Then the user controls the conveyor to tension the tape. At this time, the tape connection repair is completed.

[0039] Embodiment 2: Based on embodiment 1, Figure 2 and Figures 6-8As shown, the locking mechanism includes a fixed wheel 1201 for unidirectional power transmission. The fixed wheel 1201 is fixedly connected to the adjacent first rotating rod 5. The fixed wheel 1201 is rotatably connected to a circumferentially arrayed rotating plate 1202. A groove is provided at a position of the rotating plate 1202 close to the adjacent first rotating rod 5, and the width of the groove of the rotating plate 1202 is equal to the width of the second limiting plate 1211. A torsion spring is arranged between the fixed wheel 1201 and the adjacent rotating plate 1202 for driving the rotating plate 1202 to reset. The fixed wheel 1201 is rotatably connected to a transmission housing 1203, and the outer side of the transmission housing 1203 is fixedly connected to the adjacent fixed rod 6. A circumferentially arrayed first limiting plate 1204 is fixedly connected inside the transmission housing 1203, and the circumferentially arrayed first limiting plates 1204 correspond one by one to the circumferentially arrayed rotating plates 1202. A first gear 1205 is fixedly connected to the first rotating rod 5. A first rack 1206 is fixedly connected to the upper side of the first sliding frame 3 through a mounting frame, and the first rack 1206 meshes with the adjacent first gear 1205. An arc-shaped guide frame 9 is slidably connected to a transmission frame 1207 for monitoring the position state of the first sliding block 8. A tension spring for driving the transmission frame 1207 to reset is arranged between the arc-shaped guide frame 9 and the adjacent transmission frame 1207. A first sliding plate 1208 is fixedly connected to the transmission frame 1207. A first sliding rod 1209 for changing the rotation state of the rotating plate 1202 is slidably connected to the fixed wheel 1201. The first sliding plate 1208 is in limiting sliding fit with the adjacent first sliding rod 1209. A rotating wheel 1210 is rotatably connected to the first sliding rod 1209. The rotating wheel 1210 is located inside the fixed wheel 1201. A circumferentially arrayed second limiting plate 1211 is fixedly connected to the rotating wheel 1210, and the circumferentially arrayed second limiting plates 1211 correspond one by one to the circumferentially arrayed rotating plates 1202. The rotating plate 1202 is in limiting cooperation with the adjacent second limiting plate 1211, and the rotating plate 1202 can only rotate towards the direction of the adjacent second limiting plate 1211. The second limiting plate 1211 is slidably connected to the adjacent fixed wheel 1201. A spring for driving the circumferentially arrayed second limiting plates 1211 to reset is arranged between the fixed wheel 1201 and the adjacent rotating wheel 1210.

[0040] As Figure 3 , Figure 9 and Figure 10As shown in the figure, the protection mechanism includes two first fixing frames 1301 that are mirror-distributed. Both of the two first fixing frames 1301 are slidably connected to the first sliding frame 3. Each of the two first fixing frames 1301 is provided with two sliding grooves that are mirror-distributed. Two second sliding plates 1302 are slidably connected between the corresponding sliding grooves of the four first fixing frames 1301 that are mirror-distributed. The second sliding plate 1302 is composed of two sliding rods that are mirror-distributed and a connecting member therebetween. Both of the two second sliding plates 1302 are slidably connected with two pressing plates 1303 that are mirror-distributed. A spring is arranged between the pressing plate 1303 and the adjacent second sliding plate 1302. First fixing blocks 1304 are fixedly connected to the front sides of both of the two second sliding plates 1302. Second racks 1305 are slidably connected to both of the two first fixing blocks 1304. A second motor 1307 is slidably connected to the front-side first fixing frame 1301 through a mounting frame. A second gear 1308 is fixedly connected to the output shaft of the second motor 1307. Both of the two second gears 1308 are meshed with the second rack 1305. A locking assembly for preventing the tape from rebounding is arranged on the rear-side first fixing frame 1301. The sliding groove of the first fixing frame 1301 is composed of a vertical sliding groove and an inclined sliding groove. The distance from the end of the inclined sliding groove of the first fixing frame 1301 that is far from the vertical sliding groove of the adjacent first fixing frame 1301 to the center line in the vertical direction of the adjacent first fixing frame 1301 is less than the distance from the end of the inclined sliding groove of the first fixing frame 1301 that is close to the vertical sliding groove of the adjacent first fixing frame 1301 to the center line in the vertical direction of the adjacent first fixing frame 1301.

[0041] As Figure 9 and Figure 11 shown in the figure, the locking assembly includes a second fixing block 1309. The second fixing block 1309 is fixedly connected to the lower second sliding plate 1302. A synchronizing block 13091 is fixedly connected to the upper second sliding plate 1302. A third rack 1310 is fixedly connected to the upper side of the second fixing block 1309. The upper part of the third rack 1310 does not have teeth. The synchronizing block 13091 is slidably connected with the third rack 1310. A synchronizing plate 13092 is slidably connected to the rear side of the rear-side first fixing frame 1301. The synchronizing plate 13092 is slidably connected with the synchronizing block 13091. A third gear 1311 is rotatably connected to the rear side of the synchronizing plate 13092. A threaded rod 1312 is fixedly connected to the rear side of the rear-side first fixing frame 1301 through a mounting frame. A fourth gear 1313 is threadedly connected to the threaded rod 1312. When the distance between the two second sliding plates 1302 in the vertical sliding groove is the closest, the third gear 1311 is meshed with the fourth gear 1313.

[0042] As Figure 1 、 Figure 12 and Figure 13As shown in the figure, the tensioning mechanism includes two second fixing frames 1401 that are mirror - distributed. The two second fixing frames 1401 that are mirror - distributed are both fixedly connected to the frame 1. Each of the two second fixing frames 1401 that are mirror - distributed is fixedly connected with a second hydraulic push rod 1402 for providing extrusion force. The telescopic ends of the two second hydraulic push rods 1402 are fixedly connected with a fixing plate 1403. The fixing plate 1403 is fixedly connected with a third motor 1404 for providing tensioning force through a mounting frame. The third motor 1404 is a self - locking motor. The output shaft of the third motor 1404 is fixedly connected with a fifth gear 1405. The fixing plate 1403 is slidably connected with two fourth racks 1406 that are circumferentially arrayed. The two fourth racks 1406 are circumferentially arrayed with the circumference of the output shaft of the third motor 1404 as the center. Both of the two fourth racks 1406 are meshed with the fifth gear 1405. Both of the two fixing plates 1403 are slidably connected with a tensioning frame 1407. Both of the two tensioning frames 1407 are slidably connected with a second sliding frame 1408. The fourth rack 1406 is fixedly connected with the adjacent second sliding frame 1408. A spring is arranged between the tensioning frame 1407 and the adjacent second sliding frame 1408.

[0043] During the process that the user controls the first motor 4 to tighten the tape, taking the front - side first motor 4 as an example, the output shaft of the first motor 4 drives the fixed wheel 1201 to rotate through the first rotating rod 5. At this time, the circumferentially - arrayed second limiting plates 1211 respectively limit the adjacent rotating plates 1202, so that the rotating plates 1202 cannot rotate freely. The fixed wheel 1201 drives the transmission shell 1203 to rotate through the circumferentially - arrayed rotating plates 1202 and the circumferentially - arrayed first limiting plates 1204. The transmission shell 1203 drives the first friction roller 7 to rotate through the fixed rod 6 and drives a part of the tape. The first friction roller 7 drives the first sliding block 8 to rotate in the arc - shaped guide frame 9 until the first friction roller 7 drives the first sliding block 8 and a part of the tape to rotate to the end of the arc - shaped guide frame 9. The first sliding block 8 contacts and squeezes the transmission frame 1207 to move rightward and stretches the tension spring between the transmission frame 1207 and the arc - shaped guide frame 9. The transmission frame 1207 drives the first sliding plate 1208 to move rightward.

[0044] During the process of the driving frame 1207 driving the first sliding plate 1208 to move rightward, the first sliding plate 1208 squeezes the first sliding rod 1209 to move forward. The first sliding rod 1209 drives the circumferentially arrayed second limiting plates 1211 to move forward through the rotating wheel 1210, and squeezes the spring between the rotating wheel 1210 and the fixed wheel 1201 until the circumferentially arrayed second limiting plates 1211 move forward to the end. At this time, the circumferentially arrayed second limiting plates 1211 lose the limitation on the circumferentially arrayed rotating plates 1202. As the fixed wheel 1201 drives the rotating plates 1202 to rotate, the rotating plates 1202 are squeezed by the adjacent first limiting plates 1204 and rotate, and the torsion spring between the rotating plates 1202 and the fixed wheel 1201 is energized until the first limiting plates 1204 lose the limitation on the adjacent rotating plates 1202. The torsion spring between the rotating plates 1202 and the fixed wheel 1201 drives the rotating plates 1202 to reset. Therefore, at this time, the circumferentially arrayed rotating plates 1202 and the circumferential array cooperation cannot drive the transmission housing 1203 to rotate. On the contrary, if the tape drives the transmission housing 1203 and the circumferentially arrayed first limiting plates 1204 to rotate in reverse due to the reaction force through the first friction roller 7 and the fixed rod 6, the circumferentially arrayed rotating plates 1202 will limit the circumferentially arrayed first limiting plates 1204, ensuring the state of the first friction roller 7 and the tape.

[0045] During the above process, the first rotating rod 5 drives the first gear 1205 to rotate. The first gear 1205 meshes with the adjacent first rack 1206 and drives the first friction roller 7, the second friction roller 10 and the tape to move towards each other. If the first friction roller 7 and the second friction roller 10 cooperate to fix the shape of the tape, but the first friction roller 7 on the left and the second friction roller 10 on the right still do not cooperate to clamp the tape, the first rotating rod 5 continues to drive the first friction roller 7, the second friction roller 10 and the tape to move towards each other through the meshing of the first gear 1205 and the adjacent first rack 1206 until the first friction roller 7 in the front and the second friction roller 10 in the back cooperate to clamp the two layers of tape, and the first friction roller 7 in the back and the second friction roller 10 in the front cooperate to clamp the two layers of tape. At this time, the two layers of tape between the first friction roller 7 and the second friction roller 10 are closely attached. And if the movement trends of the two layers of tape are completely opposite to the force directions, when the tape is stressed, the opposite acting forces of the two layers of tape will generate resistance, and the greater the force on the tape, the higher its tightness. The user stops the first motor 4. At this time, the tape is locked. Through the cooperation of the first gear 1205 and the adjacent first rack 1206 and driving the first friction roller 7 and the second friction roller 10 to move towards each other and clamp, the two layers of tape moving in opposite directions lock themselves through the mutual acting forces, enhancing the locking effect on the tape.

[0046] When using this device to stretch and bond the conveyor belt, the user first finishes processing the belt and applies glue. Then the user moves this device to the belt bonding position. Subsequently, one end of the belt is passed through the four upper and lower pressing plates 1303. Then the user starts the second motor 1307. The output shaft of the second motor 1307 drives the second gear 1308 to rotate. The second gear 1308 meshes with the two second racks 1305 and drives the upper and lower first fixing blocks 1304 to move towards each other. Taking the lower first fixing block 1304 as an example, the first fixing block 1304 drives the second sliding plate 1302 to move upward. The second sliding plate 1302 drives the two pressing plates 1303 to move upward through the spring until the second sliding plate 1302 moves upward to the uppermost end of the vertical chute of the first fixing frame 1301. The user stops the second motor 1307. At this time, the four pressing plates 1303 have cooperated to clamp the belt.

[0047] During the process of the pressing plate 1303 clamping the belt, the lower second sliding plate 1302 drives the third rack 1310 to move upward through the second fixing block 1309. Until when the lower second sliding plate 1302 moves upward to the uppermost end of the vertical chute of the first fixing frame 1301, the third rack 1310 starts to mesh with the third gear 1311.

[0048] The user installs the lower tensioning mechanism so that the other end of the belt is located between the two tensioning mechanisms. Taking the upper tensioning mechanism as an example, the user starts the third motor 1404. The output shaft of the third motor 1404 drives the fifth gear 1405 to rotate. The fifth gear 1405 meshes with the fourth rack 1406 and drives the tensioning frame 1407 to move towards each other through the second sliding frame 1408 until the distance between the two tensioning frames 1407 is equal to the length of the glued section of the belt. Then the user stops the third motor 1404 and overlaps and bonds the two glued sections of the belt. Then the user controls the telescopic ends of the two second hydraulic push rods 1402 to extend simultaneously. The telescopic ends of the two second hydraulic push rods 1402 drive the two tensioning frames 1407 to move downward synchronously through the fixing plate 1403 until the tensioning frame 1407 contacts the upper side of the belt. At this time, the two lower tensioning frames 1407 also contact the lower side of the belt. Continue to control the telescopic ends of the two second hydraulic push rods 1402 to extend simultaneously to press the two glued sections of the belt.

[0049] After the two glue - applying sections of the tape are pressed, the user stops extending the telescopic end of the second hydraulic push rod 1402. At the same time, the user controls the third motor 1404 to reverse. The output shaft of the third motor 1404 drives the fifth gear 1405 to reverse. The fifth gear 1405 meshes with the fourth rack 1406 and drives the two second sliding frames 1408 to move away from each other. Both of the two second sliding frames 1408 apply a force to the adjacent tensioning frames 1407 to move away from each other through the springs between the second sliding frames 1408 and the adjacent tensioning frames 1407. Because the tensioning frames 1407 are pressing on the glue - applying sections of the tape at this time, the four tensioning frames 1407 simultaneously tension the two glue - applying sections of the tape until the tension between the two glue - applying sections is equal to the tension when the tape is working normally. Then the user stops the third motor 1404. Subsequently, wait for the adhesive to bond the tape completely. By simultaneously tensioning the two glue - applying sections of the tape through the four tensioning frames 1407, the tape is always in a tensioned state during bonding, improving the quality of the tape after bonding is completed.

[0050] After the tape is bonded, the user controls the two first motors 4 to reverse until the two first friction rollers 7 are reset. Then the user disassembles the two first friction rollers 7 and the two second friction rollers 10. The user controls the telescopic end of the second hydraulic push rod 1402 to retract and reset. The telescopic end of the second hydraulic push rod 1402 drives the tensioning frame 1407 to reset through the fixed plate 1403. Then the user disassembles the lower second fixing frame 1401. At the same time, the user disassembles the connecting parts on the second sliding plate 1302. Then the user pulls the first fixing frame 1301 to both sides until the second sliding plate 1302 loses the limit on the tape. The user removes the device from above the tape. Then the user controls the conveyor to tension the tape. At this time, the repair of the tape connection is completed.

[0051] During the entire process of tape bonding, if the first friction roller 7 and the two second friction rollers 10 malfunction and lose their fastening on the tape, when the tape slips out to the left due to the reaction force, the tape drives the upper and lower second sliding plates 1302 to slide leftward along the inclined sliding grooves of the first fixing frame 1301 through the upper and lower four pressing plates 1303. The second sliding plate 1302 drives the second motor 1307 to move leftward synchronously through the first fixing block 1304 and the second gear 1308. During this process, the distance between the upper and lower second sliding plates 1302 gradually decreases, and the tape is further fastened synchronously by the upper and lower four pressing plates 1303. When the second sliding plate 1302 slides leftward, the inclined sliding grooves of the first fixing frame 1301 buffer and decelerate the tape through the second sliding plate 1302 and the pressing plate 1303. And during the deceleration and buffering process, the pressing force of the pressing plate 1303 on the tape increases synchronously to prevent the tape from slipping out. Through the guidance of the inclined sliding grooves of the first fixing frame 1301 on the moving path of the second sliding plate 1302, while buffering the kinetic energy of the tape, the fastening degree of the pressing plate 1303 on the tape is strengthened, preventing the tape from rebounding and threatening the staff, and ensuring the personal safety of the staff.

[0052] During the above-mentioned buffering and fastening process, the lower second sliding plate 1302 gradually moves upward and leftward along the inclined sliding groove of the first fixing frame 1301. The second sliding plate 1302 drives the third rack 1310 to move upward through the second fixing block 1309. The third rack 1310 meshes with the third gear 1311 and drives the fourth gear 1313 to rotate. The fourth gear 1313 moves leftward on the threaded rod 1312, and the distance that the fourth gear 1313 moves leftward is equal to the distance that the second sliding plate 1302 moves leftward. The upper second sliding plate 1302 drives the third gear 1311 to move leftward through the cooperation of the synchronous block 13091 and the synchronous plate 13092, so that the third gear 1311 and the fourth gear 1313 are always in a meshing state until the second sliding plate 1302 stops moving leftward. During this process, the fourth gear 1313 and the threaded rod 1312 cooperate to lock the second sliding plate 1302 to prevent the tape from recoiling and rebounding again.

[0053] Embodiment 3: On the basis of Embodiment 2, as Figures 13-15As shown, it further includes a rolling mechanism for removing air bubbles in the adhesive between the tapes. The rolling mechanism is arranged on the fixed plate 1403. The rolling mechanism includes two second sliding blocks 1501 that are mirror-image distributed. The fixed plate 1403 is provided with electric slide rails that are mirror-image distributed. The second sliding blocks 1501 that are mirror-image distributed are respectively fixedly connected to the sliders in the adjacent electric slide rails of the fixed plate 1403. A third hydraulic push rod 1502 for providing extrusion pressure during rolling is fixedly connected inside the second sliding block 1501. The telescopic end of the third hydraulic push rod 1502 is fixedly connected to a third sliding frame 1503. The second sliding block 1501 is slidably connected to the adjacent third sliding frame 1503 for driving the third sliding frame 1503 to move. The third sliding frame 1503 is slidably connected to two third sliding blocks 1504 that are front-back mirror-image distributed. Two first extrusion rollers 1505 are rotatably connected to the two third sliding blocks 1504. Two first sliding rings 1506 are rotatably connected to the two first extrusion rollers 1505. Two fourth sliding blocks 1507 are slidably connected to the two first sliding rings 1506. The two fourth sliding blocks 1507 are both slidably connected to the third sliding frame 1503. Two second extrusion rollers 1508 are rotatably connected to the two fourth sliding blocks 1507. Two first fixing rings 1509 are rotatably connected to the two second extrusion rollers 1508. Two third extrusion rollers 15081 are rotatably connected to the two first fixing rings 1509. The axes of the second extrusion roller 1508 and the third extrusion roller 15081 are on the same straight line. Two second sliding rings 15061 are rotatably connected to the two third extrusion rollers 15081. Two fifth sliding blocks 15071 are slidably connected to the two second sliding rings 15061. The two fifth sliding blocks 15071 are both slidably connected to the third sliding frame 1503. Two fourth extrusion rollers 1510 are rotatably connected to the two fifth sliding blocks 15071. Two second fixing rings 15091 are rotatably connected to the two fourth extrusion rollers 1510. A fifth extrusion roller 15101 is rotatably connected between the two second fixing rings 15091 that are mirror-image distributed. The axes of the fourth extrusion roller 1510 and the fifth extrusion roller 15101 are on the same straight line, and the distance between the fourth extrusion roller 1510 and the fifth extrusion roller 15101 from the third sliding frame 1503 is greater than the distance between the second extrusion roller 1508 and the third extrusion roller 15081 from the third sliding frame 1503, which is greater than the distance between the first extrusion roller 1505 and the third sliding frame 1503. The third sliding frame 1503 is provided with a flat pressing component for changing the rolling pressure. The outer diameters of the first extrusion roller 1505, the second extrusion roller 1508, the third extrusion roller 15081, the fourth extrusion roller 1510, and the fifth extrusion roller 15101 are all equal.

[0054] As Figures 13-15As shown in the figure, the flat pressing assembly includes five cover plates 1511 axially and arrayedly distributed. The five cover plates 1511 are all slidably connected to the third sliding frame 1503, and the distance between the cover plates 1511 and the third sliding frame 1503 gradually increases from both ends to the middle. A spring is provided between the cover plates 1511 and the third sliding frame 1503, and the elastic coefficient of the spring between the cover plates 1511 and the third sliding frame 1503 gradually increases from both ends to the middle. The first pressing roller 1505, the second pressing roller 1508, the third pressing roller 15081, the fourth pressing roller 1510, and the fifth pressing roller 15101 are respectively in contact and cooperation with the adjacent cover plates 1511. The middle three cover plates 1511 are fixedly connected with a fifth rack 1512, and the number of teeth of the middle fifth rack 1512 is more than that of the fifth racks 1512 on both sides. The third sliding frame 1503 is rotatably connected with three second rotating rods 1513 axially and arrayedly distributed through a mounting plate. The three second rotating rods 1513 are all fixedly connected with a sixth gear 1514, and the sixth gear 1514 meshes with the adjacent fifth rack 1512. The second rotating rod 1513 is fixedly connected with a traction rope 1515 penetrating through the adjacent cover plate 1511. The middle second rotating rod 1513 is fixedly connected with two mirror-image distributed traction ropes 1515. The two middle traction ropes 1515 both penetrate through the second fixing ring 15091 and are fixedly connected with a sleeve 1516. The sleeve 1516 is slidably matched with the adjacent second pressing roller 1508 and the adjacent third pressing roller 15081. The traction ropes 1515 on both sides both penetrate through the first fixing ring 1509 and are fixedly connected with a second sliding rod 1517. The first pressing roller 1505, the first sliding ring 1506, the fourth sliding block 1507, and the sleeve 1516 are all slidably matched with the adjacent second sliding rod 1517. The first fixing ring 1509 and the second fixing ring 15091 are respectively slidably connected with the adjacent traction ropes 1515.

[0055] When bonding the bonding section of the tape, it is common to manually hammer the bonding end of the tape to expel the air bubbles in the binder at the bonding end. However, this is time-consuming and laborious, and the effect is average. Therefore, during the process of tensioning and bonding the tape by the tensioning frame 1407, the user controls the telescopic ends of the two third hydraulic push rods 1502 to extend simultaneously. The telescopic ends of the two third hydraulic push rods 1502 drive the two first pressing rollers 1505, the two second pressing rollers 1508, the two third pressing rollers 15081, the two fourth pressing rollers 1510, and a fifth pressing roller 15101 to move downward synchronously through the third sliding frame 1503. The two fourth pressing rollers 1510 first come into contact with the tape. As the telescopic ends of the two third hydraulic push rods 1502 continue to extend, the third sliding frame 1503 continuously compresses the spring between the intermediate cover plate 1511 and the third sliding frame 1503 until both first pressing rollers 1505 come into contact with the tape. At this time, the user stops extending the telescopic ends of the third hydraulic push rods 1502. At this time, the pressure between the fifth pressing roller 15101 and the two fourth pressing rollers 1510 and the tape is greater than the pressure between the two second pressing rollers 1508 and the two third pressing rollers 15081 and the tape. Subsequently, the user activates the electric slide rail of the fixing plate 1403. The electric slide rail of the fixing plate 1403 drives the third sliding frame 1503, the two first pressing rollers 1505, the two second pressing rollers 1508, the two third pressing rollers 15081, the two fourth pressing rollers 1510, and a fifth pressing roller 15101 to reciprocate through the second sliding block 1501, making the pressure between the intermediate tape and the binder higher than the pressure between the two side tapes and the binder. Then, reciprocate and roll press, so that the air bubbles in the intermediate binder move to both sides. By dividing the two first pressing rollers 1505, the two second pressing rollers 1508, the two third pressing rollers 15081, the two fourth pressing rollers 1510, and a fifth pressing roller 15101 into five different pressure zones, when rolling the tape, the air bubbles in the intermediate binder move to both sides, enhancing the bonding effect of the tape.

[0056] After rolling for a period of time, the user controls the telescopic end of the third hydraulic push rod 1502 to extend. The telescopic end of the third hydraulic push rod 1502 drives the third sliding frame 1503 to move downward again. At this time, the middle fifth rack 1512 meshes with the sixth gear 1514 and drives the second rotating rod 1513 to rotate. When the second rotating rod 1513 rotates, it will gradually retract the traction rope 1515 upward. Taking the traction rope 1515 on the left side in the middle as an example, the traction rope 1515 drives the sleeve 1516 to move to the right. Because at this time, the third pressing roller 15081 and the fourth pressing roller 1510 both contact and press the tape, and their outer diameters are equal. As the sleeve 1516 moves to the right, the sleeve 1516 moves into the fourth pressing roller 1510. At this time, the third pressing roller 15081 and the fourth pressing roller 1510 are rigidly connected through the sleeve 1516. Therefore, the pressing forces of the third pressing roller 15081 and the fourth pressing roller 1510 on the tape are combined, so that the pressing forces between the two second pressing rollers 1508, the two third pressing rollers 15081, the two fourth pressing rollers 1510 and the fifth pressing roller 15101 and the tape are equal. Subsequently, continue to roll the conveyor belt. At this time, the five different pressure belts between the conveyor belt and the binder are combined into three pressure belts, so that the bubbles between the binders continue to move to both sides.

[0057] After rolling for a period of time, repeat the above steps to move the second sliding rod 1517 between the first pressing roller 1505 and the second pressing roller 1508. At this time, the pressures between the two first pressing rollers 1505, the two second pressing rollers 1508, the two third pressing rollers 15081, the two fourth pressing rollers 1510 and the fifth pressing roller 15101 and the tape are all equal. At this time, the three different pressure belts between the conveyor belt and the binder are combined into one pressure belt, so that the bubbles between the binders continue to move to both sides until they are eliminated. By gradually integrating the pressures between the tape and the binder through the sleeve 1516 and the second sliding rod 1517, while strengthening the bonding effect of the tape, the bubbles mixed in the binder are excluded, further strengthening the bonding effect of the tape.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A belt connection device for coal mines with a protection function, characterized in that: It includes a machine frame (1). The machine frame (1) is fixedly connected with a first hydraulic push rod (2) through a mounting frame. The machine frame (1) is slidably connected with a first sliding frame (3). The telescopic end of the first hydraulic push rod (2) is fixedly connected with the first sliding frame (3). The first sliding frame (3) is slidably connected with a first motor (4) through mounting blocks distributed in a circumferential array. The output shaft of the first motor (4) is fixedly connected with a first rotating rod (5). The first rotating rod (5) is provided with a fixed rod (6). The fixed rod (6) is rotatably connected with a first friction roller (7). The first friction roller (7) is fixedly connected with a first sliding block (8). The first sliding frame (3) is slidably connected with arc-shaped guide frames (9) distributed in a mirror image through mounting frames. The arc-shaped guide frames (9) are fixedly connected with second friction rollers (10) through mounting plates. The first friction roller (7) and the second friction roller (10) are both detachable. The first rotating rod (5) is provided with a locking mechanism. The first sliding frame (3) is provided with a protection mechanism. The machine frame (1) is provided with tensioning mechanisms distributed in a mirror image, and the lower tensioning mechanism is freely detachable; The protection mechanism includes first fixing frames (1301) distributed in a mirror image. The first fixing frames (1301) distributed in a mirror image are all slidably connected to the first sliding frame (3). The first fixing frames (1301) distributed in a mirror image are all provided with chutes distributed in a mirror image. A second sliding plate (1302) is slidably connected between the corresponding chutes of the first fixing frames (1301) distributed in a mirror image. The second sliding plate (1302) is slidably connected with pressing plates (1303) distributed in a mirror image. Springs are arranged between the pressing plates (1303) and the adjacent second sliding plates (1302). The second sliding plate (1302) is fixedly connected with a first fixing block (1304). The first fixing block (1304) is slidably connected with a second rack (1305). The first fixing frame (1301) close to the first fixing block (1304) is slidably connected with a second motor (1307) through a mounting frame. The output shaft of the second motor (1307) is fixedly connected with a second gear (1308). The second rack (1305) is meshed with the second gear (1308). A locking component is arranged on the first fixing frame (1301) far from the first fixing block (1304); The locking component includes a second fixing block (1309). The second fixing block (1309) is fixedly connected to one of the second sliding plates (1302). A synchronizing block (13091) is fixedly connected to the other second sliding plate (1302). The second fixing block (1309) is fixedly connected to a third rack (1310). The synchronizing block (13091) is slidably connected to the third rack (1310). A synchronizing plate (13092) is slidably connected to the first fixing frame (1301) away from the second motor (1307). The synchronizing plate (13092) is slidably connected to the synchronizing block (13091). The synchronizing plate (13092) is rotatably connected to a third gear (1311). The first fixing frame (1301) away from the second motor (1307) is fixedly connected to a threaded rod (1312) through a mounting frame. The threaded rod (1312) is threadedly connected to a fourth gear (1313). The third gear (1311) meshes with the fourth gear (1313).

2. The belt connecting device for coal mine underground with a protection function as described in claim 1, characterized in that: The locking mechanism includes a fixed wheel (1201). The fixed wheel (1201) is fixedly connected to the adjacent first rotating rod (5). The fixed wheel (1201) is rotatably connected to circumferentially arrayed rotating plates (1202). A torsion spring is provided between the fixed wheel (1201) and the adjacent rotating plate (1202). The fixed wheel (1201) is rotatably connected to a transmission housing (1203). The transmission housing (1203) is fixedly connected to the adjacent fixed rod (6). First limiting plates (1204) circumferentially arrayed are fixedly connected inside the transmission housing (1203). A first gear (1205) is fixedly connected to the first rotating rod (5). A first rack (1206) is fixedly connected to the first sliding frame (3) through a mounting frame. The first rack (1206) meshes with the adjacent first gear (1205). A transmission frame (1207) is slidably connected to the arc-shaped guide frame (9). A tension spring is provided between the arc-shaped guide frame (9) and the adjacent transmission frame (1207). The transmission frame (1207) is fixedly connected to a first sliding plate (1208). A first sliding rod (1209) is slidably connected to the fixed wheel (1201). The first sliding plate (1208) is in limiting sliding fit with the adjacent first sliding rod (1209). The first sliding rod (1209) is rotatably connected to a rotating wheel (1210). The rotating wheel (1210) is located inside the fixed wheel (1201). Second limiting plates (1211) circumferentially arrayed are fixedly connected to the rotating wheel (1210). The rotating plate (1202) is in limiting cooperation with the adjacent second limiting plate (1211). The second limiting plate (1211) is slidably connected to the adjacent fixed wheel (1201). A spring is provided between the fixed wheel (1201) and the adjacent rotating wheel (1210).

3. A belt connection device for coal mines with a protection function as described in claim 1, characterized in that: The chute of the first fixing frame (1301) is composed of a vertical chute and an inclined chute, and the distance from the end of the inclined chute of the first fixing frame (1301) far from the vertical chute of the adjacent first fixing frame (1301) to the center line in the vertical direction of the adjacent first fixing frame (1301) is less than the distance from the end of the inclined chute of the first fixing frame (1301) close to the vertical chute of the adjacent first fixing frame (1301) to the center line in the vertical direction of the adjacent first fixing frame (1301).

4. The belt connecting device for underground coal mine with protection function according to claim 1, characterized in that: The tensioning mechanism includes a second fixing frame (1401), the second fixing frame (1401) is fixedly connected to the frame (1), the second fixing frame (1401) is fixedly connected with a second hydraulic push rod (1402), the telescopic end of the second hydraulic push rod (1402) is fixedly connected with a fixing plate (1403), the fixing plate (1403) is fixedly connected with a third motor (1404) through a mounting frame, the output shaft of the third motor (1404) is fixedly connected with a fifth gear (1405), the fixing plate (1403) is slidably connected with fourth racks (1406) distributed in a circumferential array, the fourth racks (1406) are engaged with the fifth gear (1405), the fixing plate (1403) is slidably connected with a tensioning frame (1407), the tensioning frame (1407) is slidably connected with a second sliding frame (1408), the fourth racks (1406) are fixedly connected with the adjacent second sliding frames (1408), and a spring is arranged between the tensioning frame (1407) and the adjacent second sliding frames (1408).

5. The belt connecting device for underground coal mines with a protection function according to claim 4, characterized in that: It further includes a rolling mechanism, the rolling mechanism is arranged on the fixed plate (1403), the rolling mechanism includes second sliding blocks (1501) distributed in mirror image, the fixed plate (1403) is provided with electric slide rails distributed in mirror image, the second sliding blocks (1501) distributed in mirror image are respectively fixedly connected to the sliders in the adjacent electric slide rails of the fixed plate (1403), the second sliding block (1501) is fixedly connected with a third hydraulic push rod (1502), the telescopic end of the third hydraulic push rod (1502) is fixedly connected with a third sliding frame (1503), the second sliding block (1501) is slidably connected with the adjacent third sliding frame (1503), the third sliding frame (1503) is slidably connected with third sliding blocks (1504) distributed in mirror image, the third sliding block (1504) is rotatably connected with a first extrusion roller (1505), the first extrusion roller (1505) is rotatably connected with a first sliding ring (1506), the first sliding ring (1506) is slidably connected with a fourth sliding block (1507), the third sliding frame (1503) is slidably connected with the fourth sliding block (1507), the fourth sliding block (1507) is rotatably connected with a second extrusion roller (1508), the second extrusion roller (1508) is rotatably connected with a first fixing ring (1509), the first fixing ring (1509) is rotatably connected with a third extrusion roller (15081), the third extrusion roller (15081) is rotatably connected with a second sliding ring (15061), the second sliding ring (15061) is slidably connected with a fifth sliding block (15071), the fifth sliding block (15071) is slidably connected with the third sliding frame (1503), the fifth sliding block (15071) is rotatably connected with a fourth extrusion roller (1510), the fourth extrusion roller (1510) is rotatably connected with a second fixing ring (15091), a fifth extrusion roller (15101) is rotatably connected between the second fixing rings (15091) distributed in mirror image, and the third sliding frame (1503) is provided with a flat pressing component.

6. The belt connecting device for coal mine underground with protection function according to claim 5, characterized in that: The outer diameters of the first extrusion roller (1505), the second extrusion roller (1508), the third extrusion roller (15081), the fourth extrusion roller (1510) and the fifth extrusion roller (15101) are all equal.

7. The belt connecting device for coal mine underground with protection function according to claim 5, characterized in that: The flat pressing assembly includes cover plates (1511) axially arrayed and distributed. The axially arrayed and distributed cover plates (1511) are all slidably connected to the third sliding frame (1503). A spring is provided between the cover plate (1511) and the third sliding frame (1503). The first pressing roller (1505), the second pressing roller (1508), the third pressing roller (15081), the fourth pressing roller (1510), and the fifth pressing roller (15101) are respectively in contact and cooperation with the adjacent cover plates (1511). The cover plate (1511) is fixedly connected with a fifth rack (1512). The third sliding frame (1503) is rotatably connected with second rotating rods (1513) axially arrayed and distributed through a mounting plate. The second rotating rods (1513) are fixedly connected with sixth gears (1514). The sixth gears (1514) are meshed with the adjacent fifth racks (1512). The second rotating rods (1513) are fixedly connected with traction ropes (1515) penetrating through the adjacent cover plates (1511). The traction ropes (1515) away from the second sliding block (1501) penetrate through the second fixing ring (15091) and are fixedly connected with sleeves (1516). The sleeves (1516) are slidably matched with the adjacent second pressing roller (1508) and the adjacent third pressing roller (15081). The traction ropes (1515) close to the second sliding block (1501) penetrate through the first fixing ring (1509) and are fixedly connected with second sliding rods (1517). The first pressing roller (1505), the first sliding ring (1506), the fourth sliding block (1507), and the sleeves (1516) are all slidably matched with the adjacent second sliding rods (1517). The first fixing ring (1509) and the second fixing ring (15091) are respectively slidably connected with the adjacent traction ropes (1515).

8. The belt connection device for underground coal mines with a protection function according to claim 7, characterized in that: The elastic coefficient of the spring between the middle cover plate (1511) and the third sliding frame (1503) is greater than that of the springs between the cover plates (1511) at both ends and the third sliding frame (1503).

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