Dual-drive dual-damping self-correcting belt type coal feeder

Abstract

The embodiment of the utility model provides a dual-drive dual-damping self-deviation-correcting belt type coal feeder which comprises a bottom frame, and an annular conveying belt is installed on the bottom frame. A rear driving device and a front driving device are arranged on one side of the underframe; a plurality of groups of buffer bracket rollers and anti-deviation bracket rollers are arranged on the underframe of the first section of the annular conveying belt; a material guide groove is formed above the annular conveying belt and is detachably connected with the bottom frame through a supporting column; the adjustable discharge hopper is connected to the end point of the annular conveying belt on the bottom frame, and a machine head buffering device is arranged in the adjustable discharge hopper. On the basis of the rear roller drive, the front roller drive is additionally arranged, and the two sets of drive devices are locked and standby for each other through the PLC control system; the service life of the carrier roller and the conveying belt is prolonged through double shock absorption of the rubber buffer carrier roller and the machine head buffer device; through the anti-deviation bracket rollers, automatic deviation correction of the annular conveying belt is achieved. The whole material conveying process is continuous, rapid, efficient and uniform, the bin blocking phenomenon can be effectively prevented, and the coal conveying device is suitable for the field of coal conveying equipment.

Description

Technical Field

[0001] The present application relates to the field of coal transportation equipment, and particularly relates to a double-drive double-shock-absorbing self-correcting belt feeder. Background Art

[0002] The transportation of raw coal is an important link in the coal mine production and transportation process. The belt feeder is a key equipment node in the coal bin feeding system, and it is necessary to continuously supply the raw coal to the receiving device evenly and quantitatively as required. Its conveying capacity, continuity, stability, and transfer efficiency requirements are very high. First, the reduction gearbox, motor, and frequency converter of its drive system must all operate normally at the same time. Once any one of these three fails, the entire feeder will be paralyzed, affecting the normal production of the whole mine. Second, it has been continuously impacted by the coal flow under the coal bin, and the buffer and shock absorption function at the receiving place needs to be considered. The idlers used in common belt feeders are smooth rollers, and only by arranging them densely can the bearing capacity be satisfied. The smooth rollers directly bear the impact of the material without any buffer and protection, resulting in frequent damage to the idlers and a short service life. Third, once the conveyor belt runs off track, not only can it not convey normally, but also a large amount of material and human resources are required for repair, and it is also easy to cause accidents such as conveyor belt tearing, causing great economic losses to the enterprise. Many existing belt feeders have no anti-deviation measures or place 2 vertical rollers on both sides of the conveyor belt, which only play a role in preventing the edge of the conveyor belt from rubbing against the frame. And CN219155500U proposes that when the deviation of the conveyor belt is small, 3 notches are provided on the side support of the idler bracket, and the two ends of the idler can be placed in different notches, so that a small angle of deviation of the idler can also achieve the function of fine-tuning the deviation of the conveyor belt. However, these cannot automatically correct the deviation and cannot fundamentally solve the problem of conveyor belt deviation. Summary of the Invention

[0003] In order to solve one of the above technical defects, the embodiment of the present application provides a feeding device, including a chassis;

[0004] An endless conveyor belt is arranged on the chassis through a driving roller and a deflecting roller. The bearing seat of the driving roller is slidably connected to the chassis through a sliding frame;

[0005] A rear driving device, whose output end can be connected to the driving roller;

[0006] A front driving device, whose output end can be connected to the deflecting roller;

[0007] An idler assembly is installed on the chassis between the driving roller and the deflecting roller;

[0008] A detachable movable support, including a material guiding groove arranged above the endless conveyor belt. The material guiding groove is detachably connected to the chassis through a support column. The feeding port of the material guiding groove is connected to the coal bin port through a coal bin connection section;

[0009] The adjustable discharge hopper is installed on one side of the deflection roller on the chassis. An apron buffer device is arranged inside it. Raw coal falls into the adjustable discharge hopper from the endless conveyor belt and is discharged to the main conveyor after being buffered by the apron buffer device.

[0010] Furthermore, the idler assembly includes multiple groups of buffer idlers and supporting bottom idlers. The buffer idlers include:

[0011] The first channel steel is horizontally arranged on the chassis;

[0012] Two rubber springs are respectively vertically installed at both ends of the first channel steel;

[0013] Two idler brackets are respectively vertically installed on the two rubber springs;

[0014] The rubber roller body has its roller shaft ends respectively rotatably connected to the two idler brackets.

[0015] Furthermore, the idler assembly also includes multiple groups of anti-deviation idlers and supporting bottom idlers. The anti-deviation idlers include:

[0016] The first channel steel is horizontally arranged on the chassis;

[0017] The slewing upper frame has its bottom rotatably connected to the first channel steel through a bearing;

[0018] The rubber roller body is rotatably connected to the slewing upper frame;

[0019] Two vertical rollers are respectively vertically installed at both ends of the slewing upper frame.

[0020] Furthermore, the gap between the bottom of the material guiding chute and the endless conveyor belt can be adjusted by the support columns. The material guiding chute includes:

[0021] The inner lining manganese plate is fixedly installed on the inner sides of the two side plates of the material guiding chute through high-strength bolts;

[0022] The sealing plate is arranged at the bottom of the openings on both sides of the material guiding chute;

[0023] Multiple lifting lugs are symmetrically arranged on both sides of the material guiding chute;

[0024] A pressure reducing device is installed directly below the feeding port of the material guiding chute. The pressure reducing device includes an arched top plate arched upward in the middle. The arched top plate is connected to the inner lining manganese plate through multiple first channel steels.

[0025] Furthermore, the apron buffer device includes:

[0026] The crusher tooth plate has its tooth surface facing upward at the coal dropping point inside the adjustable discharge hopper. The crusher tooth plate is connected to the inner wall of the adjustable discharge hopper through multiple chain links and hovers above the conveyor belt surface of the main conveyor.

[0027] The liner is connected to the bottom surface of the crusher tooth plate.

[0028] Furthermore, a gate system is installed on the silo connection section. The gate system includes:

[0029] A gate, which is slidably connected to the silo connection section;

[0030] An electro-hydraulic pump, which is installed on the silo connection section;

[0031] Two electro-hydraulic push rods are respectively installed on both sides of the silo connection section. The input end of the electro-hydraulic push rod is connected to the output end of the electro-hydraulic pump through a hose, and the output end of the electro-hydraulic push rod is connected to [the relevant part]. The electro-hydraulic push rod can adjust the opening size of the feeding port of the silo connection section by pushing the gate.

[0032] Furthermore, the lower end of the support column is detachably connected to the chassis through bolts. A concave bracket is welded on the outer guard plate of the material guide groove. Corresponding vertical waist-shaped grooves are respectively opened on the upper ends of both sides of the support column and on both sides of the concave bracket. The support column is sleeved inside the concave bracket. After the waist-shaped grooves of the support column are aligned with the waist-shaped grooves of the concave bracket, they are connected through a fastening bolt passing through. A pressing plate is provided at the upper end of the support column, and a pressing bolt is threadedly connected to the concave bracket at the position corresponding to the pressing plate.

[0033] Furthermore, a screw take-up device is installed on one side of the drive roller on the chassis. The screw take-up device includes:

[0034] A mounting plate, which is bolted to the chassis;

[0035] A lead screw, one end of which is rotatably arranged on the mounting plate, and a second channel steel is sleeved outside the lead screw;

[0036] A nut fitting part, which is arranged on the lead screw. The nut fitting part is connected to the carriage and arranged inside the carriage.

[0037] Furthermore, the rear drive device includes:

[0038] A first mounting platform, which is arranged on one side of the chassis;

[0039] A first variable-frequency motor, which is arranged on the first mounting platform;

[0040] A first reduction gearbox, which is arranged on the first mounting platform. The input end of the first reduction gearbox is connected to the output end of the first variable-frequency motor;

[0041] A first coupling, one end of which is connected to the output end of the first reduction gearbox, and the other end of which can be connected to the roller shaft of the drive roller;

[0042] The front drive device includes:

[0043] A second mounting platform, which is arranged on one side of the chassis;

[0044] The second variable-frequency motor is arranged on the second installation platform;

[0045] The second speed reducer is arranged on the second installation platform, and the input end of the second speed reducer is connected to the output end of the second variable-frequency motor;

[0046] One end of the second coupling is connected to the output end of the second speed reducer, and the other end thereof can be connected to the roller shaft of the redirecting roller.

[0047] Further, it further includes a cleaner, and the cleaner includes:

[0048] The empty-section cleaner is installed on the support column, and the output end of the empty-section cleaner extends into the inner side of the endless conveyor belt and closely adheres to the inner surface of the endless conveyor belt;

[0049] The alloy cleaner is installed on the chassis and is located below the redirecting roller, and the output end of the alloy cleaner closely adheres to the outer surface of the endless conveyor belt.

[0050] By adopting the double-drive double-shock-absorbing self-aligning belt feeder provided by the present application, on the basis of the rear drive device, a front drive device is additionally installed to realize the locking and mutual backup of the two sets of drive devices; rubber buffer idler rollers are selected, rubber springs are further installed under the idler bracket, and a head buffer device is arranged in the discharge hopper to realize multiple shock absorptions, which can extend the service life of the idler rollers and the conveyor belt; the anti-deviation idler rollers are optimized. When the deviation of the endless conveyor belt is small, it is adjusted by the limit edge at the end of the roller body. When the deviation is large, the edge of the endless conveyor belt contacts the vertical roller, triggering the anti-deviation idler roller, and using its reaction force to make the endless conveyor belt complete self-alignment. For the double-drive double-shock-absorbing self-aligning belt feeder provided by the present application, the whole process of material transportation is continuous, fast, efficient and uniform, effectively preventing the bin blocking phenomenon caused by the uneven transportation and accumulation of raw coal inside the equipment; the discharging is uniform, reducing the impact on the main-line conveyor belt during feeding, and being beneficial to the subsequent screening operation.

[0051] Other features and advantages of the present invention will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained by the content pointed out in the written specification, claims, and drawings. Description of the Drawings

[0052] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0053] Figure 1 It is the rear axonometric view of the double-drive double-shock-absorbing self-aligning belt feeder provided by the embodiment of the present application;

[0054] Figure 2 Front view axonometric drawing of the dual-drive, dual-shock-absorbing and self-correcting belt feeder provided by the embodiment of the present application;

[0055] Figure 3 Structural schematic diagram of the feeding device provided by the embodiment of the present application;

[0056] Figure 4 Structural schematic diagram of the chassis provided by the embodiment of the present application;

[0057] Figure 5 Structural schematic diagram of the screw tensioning device provided by the embodiment of the present application;

[0058] Figure 6 Structural schematic diagram of the idler assembly provided by the embodiment of the present application;

[0059] Figure 7 Structural schematic diagram of the detachable movable bracket provided by the embodiment of the present application;

[0060] Figure 8 For Figure 7 Enlarged schematic diagram at position A in

[0061] Figure 9 Structural schematic diagram of the pressure relief device provided by the embodiment of the present application;

[0062] Figure 10 Structural schematic diagram of the gate system provided by the embodiment of the present application;

[0063] Figure 11 Structural schematic diagram of the adjustable discharge hopper provided by the embodiment of the present application;

[0064] Figure 12 Schematic diagram of the installation position of the cleaner provided by the embodiment of the present application;

[0065] Among them, 1 is a feeding device, 10 is a chassis, 11 is a screw tensioning device, 111 is a mounting plate, 112 is a lead screw, 113 is a nut mating part, 12 is a buffer idler bracket, 121 is a roller body, 122 is a first limit rib, 123 is an idler bracket, 124 is a rubber spring, 13 is an anti-deviation support idler, 131 is a bearing, 132 is a slewing upper frame, 14 is a lower idler, 15 is a vertical idler, 16 is a driving roller, 161 is a bearing housing, 17 is a redirecting roller, 171 is a second limit rib, 18 is an endless conveyor belt, 2 is a detachable movable bracket, 20 is a support column, 201 is a concave bracket, 202 is a kidney-shaped groove, 203 is a fastening bolt, 204 is a pressing plate, 205 is a clamping bolt, 21 is a silo connection section, 22 is a feed chute, 221 is a manganese lining plate, 222 is a lifting lug, 223 is a sealing plate, 23 is a valve system, 231 is an electro-hydraulic push rod, 232 is an electro-hydraulic pump, 233 is a high-pressure hose, 234 is a gate, 24 is a pressure reducing device, 241 is an arched roof plate, 3 is a rear drive device, 30 is a first mounting platform, 31 is a first variable-frequency motor, 32 is a first reduction gearbox, 33 is a first coupling, 4 is a front drive device, 40 is a second mounting platform, 41 is a second variable-frequency motor, 42 is a second reduction gearbox, 43 is a second coupling, 5 is an adjustable discharge hopper, 50 is a head buffer device, 501 is a connecting link, 502 is a crusher tooth plate, 503 is a lining plate, 6 is a cleaner, 61 is an empty-section cleaner, 62 is an alloy cleaner, 7 is a main-line conveyor, 91 is an angle steel, 92 is an I-beam, 93 is a flat iron, 94 is a first channel steel, 95 is a second channel steel, 96 is a high-strength bolt. Detailed implementation manners

[0066] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further elaborates on the exemplary embodiments of the present application with reference to the attached Figures 1-12 Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0067] In the process of implementing the present application, the inventors found that the transportation of raw coal is an important link in the coal mine production and transportation process, and the belt feeder is a key node device in the coal feeding system of the bunker. It is necessary to supply the raw coal to the receiving device evenly, continuously and quantitatively as required. Its conveying capacity, continuity, stability and transfer efficiency are all required to be very high. First, the speed reducer, motor and frequency converter of its drive system must all operate normally at the same time. Once any one of these three fails, it will cause the entire feeder to be paralyzed and affect the normal production of the whole mine. Second, it has been continuously impacted by the coal flow under the bunker, and the buffer and shock absorption function at the receiving place needs to be considered. The rollers used in common belt feeders are smooth rollers, and only by arranging them densely can it meet the bearing capacity. The smooth rollers directly bear the impact of the materials without any buffer and protection, resulting in frequent damage to the rollers and a short service life. Third, once the conveyor belt runs off track, not only can it not convey normally, but also a large amount of material and manpower are required for repair, and it is also easy to cause accidents such as conveyor belt tearing, causing greater economic losses to the enterprise. Many existing belt feeders have no anti-deviation measures or place 2 vertical rollers on both sides of the conveyor belt, which only play the role of blocking the friction between the edge of the conveyor belt and the frame. And CN219155500U proposes that when the deviation amount of the conveyor belt is small, 3 notches are provided on the side support of the roller bracket, and the two ends of the roller can be placed at different notches, so that a small angle of deviation of the roller can also achieve the function of fine-tuning the deviation of the conveyor belt. However, these cannot automatically correct the deviation and cannot fundamentally solve the problem of conveyor belt deviation.

[0068] In view of the above problems, in the embodiments of the present application, a double-drive, double-shock-absorbing and self-correcting belt feeder is provided, as Figure 1 , Figure 2 , Figure 4 shown, including:

[0069] A feeding device 1, including a chassis 10, the chassis 10 is formed by overlapping second channel steels 95 of different lengths into load-bearing legs and a rectangular frame. Angle steels 91 are connected between the two transverse legs, and the rectangular frame is fixed to the angle steel with bolts, and its four sides are detachable to facilitate the rapid replacement of the endless conveyor belt 18;

[0070] An endless conveyor belt 18, preferably made of a polyester flame-retardant wear-resistant tape, with an EP300 polyamide as the belt core inside, and at the same time a steel wire belt core is added, thus well solving the problem of elongation of the conveyor belt, improving the tear resistance of the tape and extending its service life. Its two ends are respectively installed on the chassis 10 through a driving roller 16 and a deflecting roller 17. A sliding frame is installed at the bottom of the bearing seat 161 of the driving roller 16, and the driving roller 16 is slidably connected to the chassis 10 through the sliding frame. Second limit edges 171 are provided on both sides of the deflecting roller 17;

[0071] A rear drive device 3, whose output end can be connected to the driving roller 16;

[0072] The front drive device 4, whose output end can be connected to the redirecting roller 17;

[0073] The idler assembly is installed on the chassis 10 between the drive roller 16 and the redirecting roller 17;

[0074] The detachable movable support 2 includes a material guiding trough 22 arranged above the endless conveyor belt 18. The material guiding trough 22 is detachably connected to the chassis 10 through 4 support columns 20 (distributed in pairs on both sides of the material guiding trough 22). The feeding port of the material guiding trough 22 is connected to the silo opening through the silo connection section 21. The feeding port is a rectangular opening (such as 1800×1200), and the silo connection section 21 is surrounded by the second channel steel 95 and angle steel 91 around it, and is bolted to the upper silo opening and the lower material guiding trough 22 respectively;

[0075] The adjustable discharge hopper 5 is installed on the chassis 10 on one side of the redirecting roller 17, and a head buffer device 50 is arranged inside it. The raw coal falls into the adjustable discharge hopper 5 from the endless conveyor belt 18 and is discharged to the main line conveyor 7 after being buffered by the head buffer device 50.

[0076] In the process of implementing the present application, the inventor found that since most of the idlers of the belt feeder are located at the receiving place, the operating environment is relatively harsh, and they are prone to deformation and damage due to the bin pressure gravity and the continuous impact force of the material. Moreover, the belt speed of the belt feeder is low, and the material stays on the conveyor belt for a long time, which will also cause the idlers to be stressed for a long time, increasing their intangible loss and fatigue, and reducing the service life of the roller body and the idler group cross beam.

[0077] In view of the above problems, a preferred solution is provided in the embodiments of the present application, as Figure 6 shown. The idler assembly includes multiple groups of buffer bracket rollers 12 and supporting lower idlers 14. The buffer bracket rollers 12 include:

[0078] The first channel steel 94 is horizontally arranged on the chassis 10 as the cross beam of the idler;

[0079] Two rubber springs 124 are respectively vertically installed at both ends of the first channel steel 94;

[0080] Two idler brackets 123 are respectively vertically installed on the two rubber springs 124;

[0081] The rubber roller body 121, the two ends of its roller shaft are respectively rotatably connected to the two idler brackets 123, and first limit edges 122 are arranged on both sides of the rubber roller body 121 for controlling the deviation of the endless conveyor belt 18.

[0082] During specific implementation, the distance between two adjacent sets of buffer bracket rollers 12 is 1 / 3 of that of a conventional belt conveyor (e.g., about 250 mm), and the lower idler 14 is preferably a spiral idler. By installing a rubber spring 124 between the idler support 123 of the buffer bracket roller 12 and the first channel steel 94 (the idler support is fixed on the rubber spring, and the rubber spring is fixed on the crossbeam channel steel), taking advantage of the good shock absorption, sound insulation, and buffering functions of the rubber spring, as well as the property that the same rubber spring can bear multi-directional loads simultaneously, the structure of the buffer bracket roller is simplified, and its structure is compact, so it can be installed and used even in a cramped space of the belt feeder; when impacted by the coal flow, the impact force is first transmitted to the buffer bracket roller 12, and the rubber roller body 121 can relieve part of the impact force. When the remaining impact force is then transmitted to the idler support 123, the rubber spring 124 at the bottom of the idler support 123 can absorb it, thus achieving the effect of double buffering.

[0083] As a preferred solution, as Figure 6 shown, the idler assembly further includes multiple sets of anti-deviation bracket rollers 13 and supporting lower idlers 14. The anti-deviation bracket roller 13 includes:

[0084] The first channel steel 94, transversely arranged on the chassis 10 as the crossbeam of the idler.

[0085] The rotary upper frame 132, whose bottom is rotatably connected to the first channel steel 94 through a bearing 131.

[0086] The rubber roller body 121, rotatably connected to the rotary upper frame 132. First limiting edges 122 are provided on both sides of the rubber roller body 121 for controlling the deviation of the endless conveyor belt 18.

[0087] Two vertical rollers 15 are respectively vertically installed at both ends of the rotary upper frame 132. The installation positions of the vertical rollers 15 are such that when the endless conveyor belt 18 deviates, the roller surfaces of the vertical rollers 15 can contact the edge of the endless conveyor belt 18.

[0088] During specific implementation, when the deviation of the endless conveyor belt 18 is small, the first limiting edges 122 on both sides of the roller body 121 can automatically control the slight deviation of the conveyor belt; when the deviation of the conveyor belt is large, the edge of the conveyor belt contacts the vertical roller 15, triggering the anti-deviation support roller 13. There is one rubber roller body 121 and two vertical rollers 15 on the movable rotary upper frame 132. The rotary upper frame 132 is supported on the first channel steel 94 with the bearing 131 as the center. When the deviation of the endless conveyor belt 18 is large, the edge of the endless conveyor belt 18 contacts the vertical roller 15. Since the vertical roller 15 is suspended on the rotary upper frame 132, when the vertical roller 15 receives the frictional force from the edge of the endless conveyor belt 18, a rotary moment is given to the rotary upper frame 132, forcing the rotary upper frame 132 to rotate a certain angle with the rubber roller body 121 thereon. Due to the skew of the roller body, a frictional thrust in the opposite direction is given to the endless conveyor belt 18, so that the endless conveyor belt 18 automatically returns to the center, achieving the purpose of deviation adjustment.

[0089] In the process of implementing the present application, the inventor found that when the belt feeder is used on site, it is mainly connected to the bunker and the main conveyor to achieve continuous coal transfer. If the belt feeder is directly located under the bunker, the material in the hopper will exert a great pressure (bunker pressure) on it, which will inevitably lead to an increase in the operating power of the feeder.

[0090] In view of the above problems, a preferred solution is provided in the embodiments of the present application, as Figure 9 shown, the material guide trough 22 includes two side plates and a rear plate. The bottoms of the two side plates are inclined inward, and the bottom of the rear plate is inclined inward. The gap between the bottom of the material guide trough 22 and the endless conveyor belt 18 can be adjusted by the support columns 20. The material guide trough 22 includes:

[0091] The manganese lining plate 221 is fixedly installed on the inner sides of the two side plates of the material guide trough 22 by high-strength bolts 96;

[0092] The sealing plate 223 is arranged at the bottom of the openings on both sides of the material guide trough 22;

[0093] A plurality of lifting lugs 222 are symmetrically arranged on both sides of the material guide trough 22 for realizing the lifting of the material guide trough 22;

[0094] A pressure reducing device 24 is installed directly below the feed inlet of the material guide trough 22. The pressure reducing device 24 includes an arched top plate 241 arched upward in the middle. The arched top plate 241 is connected to the manganese lining plate 221 through a plurality of first channel steels 94.

[0095] During specific implementation, a material guiding chute 22 with an appropriate height is arranged at the discharge port below the hopper. Its side plates and rear plate are both made inclined, which can minimize the blocking effect of the dead zone on the material. It can not only effectively reduce the pressure of the material on the surface of the annular conveyor belt 18, but also play a role in guiding the material. Due to the full-process material guiding and low belt speed, the raw coal on the coal feeder will increase the pressure on the side of the material guiding chute 22. As Figure 7 shown, a lining manganese plate 221 is installed inside the side plate of the material guiding chute 22 to improve its wear resistance. Measure the center distance of the fixing bolts on the side plate and the size of the guard plate. After checking accurately, process the lining manganese plate 221, and drill holes on the lining manganese plate 221 according to the distance of the screw holes on the side plate, and fix it with high-strength bolts 96 to avoid affecting the service life of the lining manganese plate 221 due to bolt damage. The sealing plates 223 on both sides of the lower part of the material guiding chute 22 are preferably made of ultra-high molecular weight polyethylene plates, which can not only protect the annular conveyor belt 18 from wear, but also play a role in sealing and limiting reliably for a long time. The pressure reducing device 24 is located directly below the feeding port of the double-drive double-shock-absorbing self-correcting belt coal feeder. By installing an arched roof plate 241 at the bottom end of the material guiding chute 22, it can better overcome the air blockage and arching phenomena generated in the bin, ensure the smooth flow of the material, and thus prevent blockage due to too much or too fast feeding.

[0096] In the process of implementing the present application, the inventor found that due to the height difference at the lap joint between the coal dropping point of the coal feeder and the main line belt conveyor 7, it is easy for gangue to directly fall on the main line conveyor belt, frequently scratch the belt surface, and there is a hidden danger of material leakage.

[0097] In view of the above problems, a preferred solution is provided in the embodiment of the present application. As Figure 11 shown, the head buffer device 50 includes:

[0098] The crusher tooth plate 502 is arranged with the tooth surface facing up at the coal dropping point in the adjustable discharge hopper 5. Both ends of the crusher tooth plate 502 are connected to the inner wall of the adjustable discharge hopper 5 through multiple chain links 501, and it hovers above the conveyor belt surface of the main line conveyor 7;

[0099] The lining plate 503 is connected to the bottom surface of the crusher tooth plate 502.

[0100] During specific implementation, a head buffer device 50 is installed in the adjustable discharge hopper 5 of the double-drive double-shock-absorbing self-aligning belt feeder. According to the actual production situation on-site, the coal dropping point at the lap joint in the transportation system of the main conveyor 7 is located accurately. The length of the I-beam 92 is determined by the actual height difference between the coal dropping point and the lap joint of the main conveyor 7. The I-beam 92 is erected on both sides of the coal dropping point; the adjustable discharge hopper 5 is fabricated with angle steel 91 and steel plates, so that the I-beam 92 is firmly connected to the adjustable discharge hopper 5 to serve as the basic frame of the head buffer device 50. Drill holes in the erected I-beam 92 (the position of this connection hole is 800 mm higher than the belt surface 80 of the main conveyor 7). The crusher tooth plate 502 is preferably recycled. The two ends of the recycled crusher tooth plate 502 are connected with chain links 501 and fixed on the connection holes of the I-beam 92. The tooth surface of the crusher tooth plate 502 faces upward. Large pieces of gangue fall on it. Due to the inertial impact force, the gangue blocks are broken. At the same time, they are connected with chain links 501, so that there is a certain buffer at the stress point and the rebound force of the gangue is reduced. The lining plate 503 is fixed under the crusher tooth plate 502 to increase the strength and stress area of the buffer device. After installation, the lining plate 503 is not less than 600 mm away from the belt surface 80 of the main conveyor 7 to prevent large pieces of gangue from jamming and damaging the conveyor belt. Install two flat irons 93 at a height 100 mm higher than the belt surface 80 of the main conveyor 7 as a coal baffle to prevent gangue from falling on the roadway on both sides of the main conveyor 7.

[0101] As a preferred solution, as Figure 10 shown, a gate system 23 is installed on the bin connection section 21. The gate system 23 includes:

[0102] A gate 234, which is slidably connected to the bin connection section 21;

[0103] An electro-hydraulic pump 232, which is installed on the bin connection section 21;

[0104] Two electro-hydraulic push rods 231, which are respectively installed on both sides of the bin connection section 21. The input end of the electro-hydraulic push rod 231 is connected to the output end of the electro-hydraulic pump 232 through a hose 233. The output end of the electro-hydraulic push rod 231 is connected to the gate 234. The electro-hydraulic push rod 231 can adjust the opening size of the feed inlet of the bin connection section 21 by pushing the gate 234.

[0105] During specific implementation, the gate system 23 is hydraulically driven. The electro-hydraulic push rods 231 are installed in the second channel steel 95 on both sides of the bin connection section 21 and are connected to the electro-hydraulic pump 232 through high-pressure hoses 233; by starting the electro-hydraulic pump 232, the electro-hydraulic push rods 231 are extended and retracted, thereby driving the opening and closing of the gate 234. Different opening degrees of the gate 234 result in different amounts of coal conveyed to the coal discharge port through the annular conveyor belt 18, playing a role in regulating the coal quantity; setting the gate system between the coal bin and the main conveyor 7 is also to block the coal coming from the coal bin during the maintenance of the main conveyor belt.

[0106] As a preferred solution, as Figure 7 , Figure 8 shown, the lower end of the support column 20 is detachably connected to the chassis 10 by bolts. When it needs to be moved, the bolts are disassembled, and then it can be lifted and moved as a whole through the lifting lugs 222. A concave bracket 201 is welded on the outer guard plate of the material guiding groove 22. Corresponding vertical waist-shaped grooves 202 are respectively formed at the upper ends of both sides of the support column 20 and both sides of the concave bracket 201. The support column 20 is sleeved inside the concave bracket 201. After the waist-shaped grooves 202 of the support column 20 are aligned with the waist-shaped grooves 202 of the concave bracket 201, they are connected through the fastening bolts 203 penetrating through. The fastening bolts 203 can be adjusted up and down in the waist-shaped grooves 202. A pressing plate 204 is provided at the upper end of the support column 20. A pressing bolt 205 is threadedly connected to the concave bracket 201 at a position corresponding to the pressing plate 204. When the gap between the bottom end of the material guiding groove 22 and the annular conveyor belt 18 is adjusted to the specified requirement, the pressing bolt 205 locks the pressing plate 204 again.

[0107] As a preferred solution, as Figure 5 shown, a screw tensioning device 11 is installed on one side of the drive roller 16 on the chassis 10. The screw tensioning device 11 includes:

[0108] A mounting plate 111, which is bolted to the chassis 10;

[0109] A lead screw 112, one end of which is rotatably arranged on the mounting plate 111, and a second channel steel 95 is sleeved outside the lead screw 112;

[0110] A nut mating part 113, which is arranged on the lead screw 112, and the nut mating part 113 is connected to the carriage and arranged inside the carriage.

[0111] During specific implementation, the completely exposed lead screw 112 of the double-drive double-shock-absorbing self-aligning belt feeder is installed inside the second channel steel 95, and the nut mating part 113 is placed inside the carriage, avoiding long-term exposure outside and extending the service life; the screw tensioning device 11 is bolted to the chassis 10 through the mounting plate 111, facilitating on-site installation and adjustment; in the case of limited space for the belt feeder, the later maintenance, repair, and disassembly processes are all relatively convenient. Preferably, compared with the traditional belt feeder, the length of the lead screw is increased (for example: the tensioning stroke can reach 300 - 500 mm), facilitating the tensioning and deviation adjustment of the conveyor belt and ensuring its reliability.

[0112] As a preferred solution, as Figure 3 shown, the rear drive device 3 includes:

[0113] A first mounting platform 30, which is arranged on one side of the chassis 10;

[0114] A first variable-frequency motor 31, which is arranged on the first mounting platform 30;

[0115] The first speed reducer 32 is arranged on the first installation platform 30, and the input end of the first speed reducer 32 is connected to the output end of the first variable-frequency motor 31;

[0116] The first coupling 33 has one end connected to the output end of the first speed reducer 32 and the other end connectable to the roller shaft of the driving roller 16;

[0117] The front driving device 4 includes:

[0118] The second installation platform 40 is arranged on one side of the chassis 10;

[0119] The second variable-frequency motor 41 is arranged on the second installation platform 40;

[0120] The second speed reducer 42 is arranged on the second installation platform 40, and the input end of the second speed reducer 42 is connected to the output end of the second variable-frequency motor 41;

[0121] The second coupling 43 has one end connected to the output end of the second speed reducer 42 and the other end connectable to the roller shaft of the redirecting roller 17.

[0122] During specific implementation, the front and rear two sets of driving devices of the double-drive double-shock-absorbing self-aligning belt feeder adopt a one-use-one-backup working mode, that is, one set of driving devices operates normally, and the couplings and drums in the other set of driving devices are not connected first. The rear driving device 3 consists of a set of first speed reducer 32 and a supporting first variable-frequency motor 31, which are placed on the first installation platform 30 and drive the driving roller 16 through flange connection by the first coupling 33, and adjust the coal feeding amount by controlling the motor speed through the frequency converter; at the same time, select another set of the same second speed reducer 42 and supporting second variable-frequency motor 41 and second coupling 43 to form the front driving device 4; transport the prefabricated second installation platform 40 of the feeder in place and tighten the fixing bolts, but do not put it into operation to achieve the backup effect. Once a certain part in a set of driving devices (frequency converter, speed reducer, variable-frequency motor) fails and cannot be quickly eliminated, the connection between the coupling in the faulty driving device and its corresponding drum can be removed, and the connection between the coupling in the backup set of driving devices and its corresponding drum can be installed to make it meet the operating state and resume the operation of the double-drive double-shock-absorbing self-aligning belt feeder. At the same time, the control parts of the front and rear driving devices are integrated into the same PLC control system to play the role of locking and mutual backup of the two sets of driving devices, realize automatic switching of software following hardware, and achieve the full-automatic operation function.

[0123] As a preferred solution, the present application further includes a sweeper 6, as Figure 12 shown, the sweeper 6 includes:

[0124] The empty section cleaner 61 is installed on the support column 20, and the output end of the empty section cleaner 61 extends into the inner side of the endless conveyor belt 18 and closely adheres to the inner surface of the endless conveyor belt 18;

[0125] The alloy cleaner 62 is installed on the chassis 10 and is located below the redirecting roller 17, and the output end of the alloy cleaner 62 closely adheres to the outer surface of the endless conveyor belt 18.

[0126] During specific implementation, if the material sticking to the conveyor belt cannot be automatically unloaded due to high water content, the double-drive double-shock-absorbing self-aligning belt feeder uses the alloy cleaner 62 below the return section 17 to forcibly unload the material to prevent the material from spilling on the ground or behind the equipment during the return journey; at the same time, the empty section cleaner 61 arranged on the non-working surface of the endless conveyor belt 18 can also clean the material spilled on the inner side of the conveyor belt, prevent the material from sticking to the rollers and idlers, and eliminate the cause of the conveyor belt deviation. Generally, the cleaning device is installed later on-site.

[0127] The working principle of the double-drive double-shock-absorbing self-aligning belt feeder provided by the embodiment of the present application is as follows:

[0128] The raw coal in the coal bunker enters the feed chute 22 through the gate system 23 via the bin connection section 21 and falls onto the endless conveyor belt 18 with wear-resistant, anti-tear and impact-resistant capabilities. The huge bin pressure is relieved by the feed chute 22. The self-weight of the falling raw coal and a small amount of bin pressure are borne by the gate 234 and the closely arranged buffer idler assembly below. When the endless conveyor belt 18 is stationary, the raw coal finally stops moving due to internal friction and forms a stationary accumulation at a certain angle in the feed chute 22. When the driving device drives the driving roller through the coupling flange transmission of the speed reducer and drives the endless conveyor belt 18 to run at a certain speed, the raw coal in the feed chute 22 moves along with the endless conveyor belt 18 at the bottom, while the upper raw coal moves downward under the action of gravity and bin pressure. In this way, the bottom-layer raw coal accelerates with the conveyor belt, and a gap appears at the rear of the feed chute 22. The upper raw coal continuously fills in, driving the upper-layer raw coal to move downward continuously. The raw coal in the feed chute 22 is always in a moving state. As long as the speed is appropriate, the shear force of the raw coal movement is greater than the adhesion resistance of the raw coal, and the raw coal will not form an arch. The endless conveyor belt 18 runs at a constant speed, and the endless conveyor belt 18 drives the raw coal thereon to the adjustable discharge hopper 5. After discharging coal at the discharge hopper, the running endless conveyor belt 18 turns to the return journey. The falling raw coal is buffered by the crusher tooth plate 502 and then discharged to the main conveyor 7, thus completing the coal feeding process. By adjusting the feeder gate 234 and adjusting the frequency of the frequency converter (changing the motor speed), the coal feeding amount can be adjusted. If the material sticking to the belt cannot be automatically unloaded due to high water content, the alloy cleaner 62 below the redirecting roller 17 forcibly unloads the material to avoid the material spilling on the ground or behind the equipment during the return journey. During major repairs, the gate 234 can be closed to seal the raw coal in the bin, and the main conveyor 7 can be conveniently and safely repaired.

[0129] The double-drive double-shock-absorbing self-correcting belt feeder provided by the embodiment of the present application adopts a one-use-one-spare working mode. The front and rear groups of drive devices can be rotated regularly to ensure that one drive device is in operation and the other is in standby at all times, achieving the function of fully automatic operation, improving the probability of the normal start and operation of the feeder, and at the same time ensuring sufficient time for fault repair preparation work to ensure the safety of personnel and equipment;

[0130] Through the setting of the buffer bracket roller and the head buffer device, multiple shock-absorbing measures are used together to prevent the damage of raw coal to the roller and the conveyor belt, effectively extending the service life of the roller and the belt of the main conveyor;

[0131] By setting a screw tensioning device, the endless conveyor belt is tensioned and aligned. By setting limit edges on both sides of the drum and the intermediate roller, the deviation of the endless conveyor belt is controlled. By setting an anti-deviation bracket roller, when the deviation of the endless conveyor belt is large, its edge contacts the vertical roller, triggering alignment, and using its reaction force to make the conveyor belt self-align. The lower roller is preferably a screw roller, and at the same time, a cleaner is used to prevent materials from sticking to the drum and the roller, eliminating the inducement of conveyor belt deviation. With the joint cooperation of the above multiple alignment measures, the self-alignment of the endless conveyor belt is realized;

[0132] The pressure reduction device and its arched roof added directly below the feed inlet of the feed chute can better overcome the air blockage and arching phenomena generated in the bin, ensuring the smooth flow of materials and preventing blockage due to too much or too fast feeding. The feed chute and the lining plate are connected by high-strength bolts using 16Mn plates, improving the wear resistance of the feed chute. The sealing plates on both sides of the lower part of the feed chute are made of ultra-high molecular weight polyethylene plates, and the clearance with the endless conveyor belt is adjusted by cooperating with the columns, which can not only protect the conveyor belt from wear but also play a reliable role in sealing and limiting for a long time;

[0133] The gate system and the drive device cooperate with each other to realize the dynamic continuous adjustment of the coal feeding amount by adjusting the feeder gate and the frequency of the frequency converter (changing the motor speed), so that the feeding system can be adjusted at any time according to the actual needs of production;

[0134] The endless conveyor belt is selected as a polyester flame-retardant wear-resistant endless belt, with EP300 polyamide used as the belt core inside, and at the same time, a steel wire belt core is added. Cooperating with the screw tensioning device, the elongation problem of the conveyor belt is well solved, the tear resistance of the conveyor belt is improved, and its service life is extended;

[0135] The bottom frame rectangular frame and the movable bracket formed by overlapping general profiles are mostly connected by bolts, which are all detachable, convenient for transportation and installation, and can also quickly and conveniently replace the endless conveyor belt, etc.;

[0136] The trunk conveyor is installed with a coal baffle, which can prevent gangue from falling onto the roadway on both sides. There is no dust during operation, the surrounding is tightly sealed without coal spilling, and the on-site environmental sanitation has been greatly improved.

[0137] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0138] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0139] In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0140] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0141] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. Double-drive double-shock-absorbing self-correcting belt coal feeder, characterized in that: include: A feeding device (1) comprising a base frame (10); An endless conveyor belt (18) is arranged on the base frame (10) via a driving roller (16) and a redirecting roller (17); a bearing seat (161) of the driving roller (16) is slidably connected to the base frame (10) via a slide; A rear drive device (3), the output end of which can be connected to the drive roller (16); A front drive device (4), the output end of which can be connected to the redirecting roller (17); A roller assembly is mounted on the base frame (10) between the driving roller (16) and the redirecting roller (17); A detachable movable support (2) comprises a material guide trough (22) arranged above the endless conveyor belt (18), the material guide trough (22) being detachably connected to the base frame (10) via a support (20), and a material inlet of the material guide trough (22) being connected to a silo opening via a silo connecting section (21); The adjustable discharge hopper (5) is installed on the base frame (10) at one side of the redirection roller (17), and a head buffer device (50) is arranged therein. The raw coal falls into the adjustable discharge hopper (5) from the annular conveyor belt (18), and is discharged to the main conveyor (7) after being buffered by the head buffer device (50).

2. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 1 is characterized in that: The roller assembly comprises a plurality of groups of buffer support rollers (12) and matching lower support rollers (14), wherein the buffer support rollers (12) comprise: A first channel steel (94) is arranged transversely on the base frame (10); Two rubber springs (124) are respectively vertically mounted on two ends of the first channel steel (94); Two roller supports (123) are respectively vertically mounted on two rubber springs (124); The rubber roller body (121) has two ends of a roller shaft which are rotatably connected to two roller supports (123) respectively.

3. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 1 is characterized in that: The roller assembly further comprises a plurality of sets of anti-deviation bracket rollers (13) and matching lower rollers (14), wherein the anti-deviation bracket rollers (13) comprise: A first channel steel (94) is arranged transversely on the base frame (10); A rotary upper frame (132), the bottom of which is rotatably connected to the first channel steel (94) via a bearing (131); The rubber roller body (121) is rotatably connected to the rotary upper frame (132); Two vertical rollers (15) are respectively installed vertically at two ends of the rotating upper frame (132).

4. The double-drive double-shock absorption self-correcting belt coal feeder according to claim 1 is characterized in that: The gap between the bottom of the guide trough (22) and the endless conveyor belt (18) can be adjusted by the support (20), and the guide trough (22) comprises: A manganese lining plate (221) is fixedly mounted on the inner sides of the two side plates of the guide trough (22) by means of high-strength bolts (96); Sealing plates (223) are arranged at the bottom of the openings on both sides of the material guide trough (22); A plurality of lifting ears (222) symmetrically arranged on both sides of the material guide trough (22); A pressure reducing device (24) is installed just below the material inlet of the material guide trough (22), the pressure reducing device (24) comprising an arched top plate (241) with a middle portion arched upward, the arched top plate (241) being connected to the manganese lining plate (221) via a plurality of first channel steels (94).

5. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 1 is characterized in that: The machine head buffer device (50) comprises: A crusher tooth plate (502) is arranged at a coal drop point in the adjustable discharge hopper (5) with its tooth surface facing upward, the crusher tooth plate (502) is connected to the inner wall of the adjustable discharge hopper (5) via a plurality of chain links (501), and the crusher tooth plate (502) is suspended above the conveyor belt surface of the trunk conveyor (7); The lining plate (503) is connected to the bottom surface of the crusher tooth plate (502).

6. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 4 is characterized in that: A gate system (23) is installed on the silo connecting section (21), and the gate system (23) comprises: A gate (234) slidably connected to the silo connecting section (21); An electric hydraulic pump (232) installed on the silo connecting section (21); Two electro-hydraulic push rods (231) are respectively installed on both sides of the silo connecting section (21); the input end of the electro-hydraulic push rod (231) is connected to the output end of the electric hydraulic pump (232) via a hose (233); the output end of the electro-hydraulic push rod (231) is connected to the gate (234); the electro-hydraulic push rod (231) can adjust the opening size of the feed inlet of the silo connecting section (21) by pushing the gate (234).

7. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 4 is characterized in that: The lower end of the support (20) is detachably connected to the base frame (10) by bolts, a concave bracket (201) is welded on the outer guard plate of the guide trough (22), and the upper ends of both sides of the support (20) and the both sides of the concave bracket (201) are respectively provided with corresponding vertical waist grooves (202), the support (20) is sleeved in the concave bracket (201), and the waist groove (202) of the support (20) and the waist groove (202) of the concave bracket (201) are aligned and connected through fastening bolts (203), and a pressure plate (204) is provided at the upper end of the support (20), and a clamping bolt (205) is threadedly connected to the concave bracket (201) at a position opposite to the pressure plate (204).

8. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 1 is characterized in that: A spiral tensioning device (11) is installed on the base frame (10) at one side of the driving roller (16), and the spiral tensioning device (11) comprises: A mounting plate (111) connected to the base frame (10) by bolts; A lead screw (112), one end of which is rotatably mounted on the mounting plate (111), and a second channel steel (95) is disposed on an outer sleeve of the lead screw (112); A nut mating portion (113) is arranged on the lead screw (112); the nut mating portion (113) is connected to the slide and is arranged inside the slide.

9. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 1 is characterized in that: The rear drive device (3) comprises: A first mounting platform (30) is arranged on one side of the base frame (10); A first variable frequency motor (31) is arranged on the first mounting platform (30); A first reduction box (32) is arranged on the first mounting platform (30), wherein an input end of the first reduction box (32) is connected to an output end of the first variable frequency motor (31); a first coupling (33), one end of which is connected to the output end of the first reduction box (32), and the other end of which can be connected to the roller shaft of the driving roller (16); The front drive device (4) comprises: A second mounting platform (40) is arranged on one side of the base frame (10); A second variable frequency motor (41) is arranged on the second mounting platform (40); A second reduction box (42) is arranged on the second mounting platform (40), wherein an input end of the second reduction box (42) is connected to an output end of the second variable frequency motor (41); A second coupling (43) has one end connected to the output end of the second reduction box (42), and the other end of the second coupling can be connected to the roller shaft of the redirecting roller (17).

10. The double-drive double-shock-absorbing self-correcting belt coal feeder according to claim 1, characterized in that: It also includes a sweeper (6), wherein the sweeper (6) includes: A space cleaner (61) is mounted on the support (20), wherein the output end of the space cleaner (61) extends into the inner side of the endless conveyor belt (18) and is in close contact with the inner surface of the endless conveyor belt (18); An alloy cleaner (62) is mounted on the base frame (10) and is located below the redirecting roller (17); an output end of the alloy cleaner (62) is in close contact with the outer surface of the endless conveyor belt (18).

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