CN203158672U - Plate feeder - Google Patents

Abstract

The utility model discloses a plate feeder which comprises an ore conveying belt, an upper carrier roller, a lower carrier roller, a rack and a driving mechanism. The plate feeder is characterized in that the ore conveying belt is a plane ore conveying belt, a groove plate is horizontally arranged, ore blocking plates are arranged on two sides of the groove plate in the length direction, an arc-shaped sealing plate is arranged at the front end of the groove plate, integral bearing blocks are arranged on two sides of the upper carrier roller, integral bearing blocks are arranged on two sides of the lower carrier roller, and lubricating oil cups are arranged on the integral bearing blocks. The plate feeder further comprises a cover body, wherein the cover body is reversed-U-shaped, liner plates are arranged on the vertical wall inside the cover body, sealing square steel is connected with the lower portions of the liner plates, and supporting beams are arranged on the outer side of the cover body. According to the plate feeder, the sealing effect is improved, the problems that mud ore sticks to the ore conveying belt or the ore conveying belt hooks ore are solved, the ore conveying efficiency is improved, ore conveying load can be even, vibration of the plate feeder is reduced, electric energy unit consumption and the number of machine faults are reduced, the operating rate of the plate feeder is improved, the working intensity of workers is reduced, the plane ore conveying belt is more beneficial to installation of a sweeper, the service life of the ore conveying belt of the plate feeder is prolonged, and the plate feeder has great significance on the aspects of energy conservation, emission reduction and low-carbon production.

Description

A kind of plate belt feeder

Technical field

The utility model relates to a kind of plate belt feeder, belongs to field of mine transportation equipment.

Background technology

Plate belt feeder is widely used in industrial sectors such as mining, building materials and coal.This machine is mainly used in having below the feed bin and funnel of pressing in certain storehouse, and with even continuous various fragmentations, screening and the transportation device of flowing to of various big capacity material short range, it not only is fit to the transportation coarse-grained material, and fine is adapted to too.

Plate belt feeder principle of work and behavior of structure: it is with the rotation of frequency converter and adjustable frequency motor, through coupler and the rotation of reductor driving chain wheel shaft, and transport the mine belt device by sprocket and tank chain hinge pin engagement drive and make continuous straight line carriage movement, the fortune mine belt is supported by rack-mounted upper and lower carrying roller, and make its chain and sprocket wheel correct engagement by adjusting the afterbody take-up device, finish conveying ore purpose.Fortune ore deposit amount is determined by fortune mine belt speed and fortune mine belt width, and fortune mine belt speed is determined by reductor, drive motor and frequency converter, and it can regulate fortune ore deposit speed automatically according to fortune ore deposit drive current, reaches the purpose of regulating mine-supplying quantity.

The defective that exists of plate belt feeder in use: (1) fortune mine belt fault is many, and the life-span is short, the foundry loam ore deposit causes that long-pending ore deposit is many, post workman's cleaning amount is big, machine vibration big, load greatly; (2) upper and lower (supporting the fortune mine belt) carrying roller fault is many, easy foundry loam ore deposit, and muddy water and mud ore deposit enter bearing easily, shorten bearing life, and the bearing replacing difficulty is so influence the operation of total system.

Summary of the invention

In order to overcome above-mentioned deficiency, the utility model provides a kind of and improves rock feeder fortune mine belt device lifetime, reduce the sticking ore deposit of fortune mine belt, reduce the plate belt feeder of cleaning amount, this device has also improved the upper and lower support roller device life-span of rock feeder, effectively reduce the phenomenon that upper and lower Idler bearing easily enters the mud ore deposit, avoided the generation of fault.

The technical solution adopted in the utility model is: a kind of plate belt feeder comprises fortune mine belt, upper supporting roller, snub pulley, frame, driver train; The fortune mine belt comprises combination frid and driving chain, and the combination frid comprises frid, connecting panel, stay bearing plate, vertically gusset and horizontal gusset, vertically gusset and laterally gusset between connecting panel and frid, be connected by screw between connecting panel and the stay bearing plate; Frid is by being bolted on the driving chain, and about driving chain has two groups, a plurality of combination frids are together in series along the driving chain length direction and constitute the fortune mine belt; Upper supporting roller is positioned at fortune mine belt supported underneath fortune mine belt and driving chain; Snub pulley supports and transmission backhaul fortune mine belt; Frame comprises column, support beam; It is characterized in that: described fortune mine belt is plane fortune mine belt, and frid is for being horizontally disposed with, and described frid is provided with mine blocking plate along the length both sides, and the frid front end is provided with the arc closing plate, and the thickness of frid increases to 22mm; Described upper supporting roller is the long carrying roller of solid level, the upper supporting roller below is provided with pillar stiffener, big by immersing oneself in tightly to order on solid pop-up roll shaft, stove bolt is combined with greatly, small sleeve, it is free-running fit with axle, greatly, four blocks of anti-channeling steel plates of small sleeve both sides design, design driving chain positioning step in the middle of big sleeve, simultaneously at the pop-up roll shaft knock hole is set, with greatly, the knock hole of small sleeve outside is corresponding, axle head door and bearing gland are set, door is fixed with high strength bolt with axle, is provided with external cast iron solid housing at pop-up roll shaft two ends, and cast-iron chock is provided with lubricator cup; Described snub pulley device comprises a long roller carrier shaft of solid horizontal ladder, about the long roller carrier shaft of solid level, respectively be provided with support ring and positioning step, support and transmission backhaul fortune mine belt, the support ring two ends are respectively equipped with retainingf key, are provided with external cast iron solid housing at the long roller carrier shaft device of level two ends, and bearing seat is provided with lubricator cup, at the long roller carrier shaft of level two ends, designed the axle head door, door is used bolt with axle, is provided with fortune mine belt positioning step at the long roller carrier shaft of level two ends; Described frame is welded by 600 I-beam sections; Rock feeder also comprises cover body, and cover body is inverted U-shaped, and vertical wall is provided with liner plate in the cover body, and the liner plate below connects the sealing square steel, and the cover body outside is provided with support beam.

In the such scheme, the radius of the radian of described frid front end arc closing plate is R70～R90 mm.

In the such scheme, described cover body interior lining panel is divided into upper and lower two kinds, and thickness is respectively 40,80mm.The gap of described fortune mine belt and cover body interior lining panel is 7 ~ 13mm.

In the such scheme, described snub pulley bearing felt is lip packing by the U-shaped seal en-hancement, is provided with arc installation door opening in snub pulley bearing seat outside.

Rock feeder after the improvement is compared with current domestic and international similar technology, is desirable renewal product, and it has the following advantages:

1. improve fortune mine belt structure, improved sealing effectiveness, solve difficult problems such as HP500 crusher center, choke feed, the design of rock feeder fortune mine belt spatial structure makes the plate armature design into, has solved fortune mine belt foundry loam ore deposit and has colluded the ore deposit problem; Effectively reduce rock feeder fortune mine belt and leaked the ore deposit, increase work efficiency, reduce labor strength, and be conducive to install swabbing pig and improve rock feeder fortune mine belt service life, stop the production safety accident of " fracture of hold down groove crab bolt, fortune mine belt fracture ", improve internal safety, reduced danger factor;

2. the upper and lower long carrying roller of ingenious design replaces short carrying roller, and bearing seat is set to fortune mine belt outside, avoids bearing to advance Ni Kuang, and makes that plate belt feeder is stressed evenly, machine vibration reduces greatly, meets operating needs; Plate belt feeder can not be realized load evenly before overcoming, and can not solve bearing again and enter the mud ore deposit and bring the big disadvantage of maintenance amount to field worker;

3. after rock feeder improves, realize import crusher center choke feed, improve broken ore deposit efficient, broken load evenly reduces vibration, reduction power mono-consumption and the breakdown of machinery of machine, improves the operating rate of rock feeder, the rock feeder operating rate is from original 65.96%, bring up to 75.00%, improved 9%, can transport more than 50 ten thousand tons in ore more every year;

4. aspect energy-saving and emission-reduction, low-carbon (LC) production, be significant.

Below in conjunction with drawings and Examples the utility model is described further.

Description of drawings

Fig. 1 is structural representation of the present utility model.

1 is cover body among the figure, and 2 is frid, and 3 is liner plate, and 4 are the sealing square steel, and 5 is driving chain, and 6 is the upper supporting roller bearing seat, and 7 is upper supporting roller, and 8 is frame, and 9 is snub pulley, and 10 is the snub pulley bearing seat, and 11 is support beam.

The specific embodiment

Embodiment:

As shown in Figure 1, a kind of plate belt feeder comprises fortune mine belt, upper supporting roller, snub pulley, frame, driver train; The fortune mine belt comprises combination frid and driving chain, and the combination frid comprises frid, connecting panel, stay bearing plate, vertically gusset and horizontal gusset, vertically gusset and laterally gusset between connecting panel and frid, be connected by screw between connecting panel and the stay bearing plate; Frid is by being bolted on the driving chain, and about driving chain has two groups, a plurality of combination frids are together in series along the driving chain length direction and constitute the fortune mine belt; Upper supporting roller is positioned at fortune mine belt supported underneath fortune mine belt and driving chain; Snub pulley supports and transmission backhaul fortune mine belt; Frame comprises column, support beam; It is characterized in that: described fortune mine belt is plane fortune mine belt, and frid 2 is for being horizontally disposed with, and described frid 2 is provided with mine blocking plate along the length both sides, and frid 2 front ends are provided with the arc closing plate, and the thickness of frid 2 increases to 22mm; Described upper supporting roller 7 is the long carrying roller of solid level, upper supporting roller 7 belows are provided with pillar stiffener, big by immersing oneself in tightly to order on 7 of solid upper supporting rollers, stove bolt is combined with greatly, small sleeve, it is free-running fit with axle, greatly, four blocks of anti-channeling steel plates of small sleeve both sides design, design driving chain positioning step in the middle of big sleeve, simultaneously 7 of upper supporting rollers knock hole is set, with greatly, the knock hole of small sleeve outside is corresponding, axle head door and bearing gland are set, and door is fixed with high strength bolt with axle, is provided with external cast iron solid housing at pop-up roll shaft two ends, be upper supporting roller bearing seat 6, upper supporting roller bearing seat 6 is provided with lubricator cup; Described snub pulley 9 devices comprise a long roller carrier shaft of solid horizontal ladder, about the long roller carrier shaft of solid level, respectively be provided with support ring and positioning step, support and transmission backhaul fortune mine belt, the support ring two ends are respectively equipped with retainingf key, be provided with external cast iron solid housing at the long roller carrier shaft device of level two ends, it is snub pulley bearing seat 10, snub pulley bearing seat 10 is provided with lubricator cup, at the long roller carrier shaft of level two ends, designed the axle head door, door is used bolt with axle, is provided with fortune mine belt positioning step at the long roller carrier shaft of level two ends; Described frame 8 is welded by 600 I-beam sections; Rock feeder also comprises cover body 1, and cover body 1 is inverted U-shaped, and vertical wall is provided with liner plate 3 in the cover body 1, and liner plate 3 belows connect sealing square steel 4, and cover body 1 outside is provided with support beam 11.

Concrete method for making is:

1, design plate belt feeder fortune mine belt, comprise 1. 105 compound type frids are assembled into the fortune mine belt by driving chain, (oad 1870 * 336 * 257mm) is improved to plane combination frid (oad 1870 * 336 * 259mm) with 105 square combination frids, just square fortune mine belt is improved to plane fortune mine belt, removes former stud; 2. in order to guarantee to transport mine belt intensity and rigidity, 105 frid thickness are improved to 22 millimeters by 20 millimeters; 3. in order to prevent hold down groove crab bolt head wearing and tearing, fixedly hex bolt M20 * 90,1680 covers are improved to countersunk head and carefully buckle bolt M20 * 1.5 * 90,1680 and overlap with frid; 4. to become flexible in order preventing, bolt of rear end plate M20 slightly to be detained 2mm be improved to M20 and carefully detain 1.5mm, the countersunk head degree of depth is improved to 8 millimeters; 5. in order to improve fortune mine belt bond strength, prevent that bolt fracture from causing that the fortune mine belt fractures, fixedly 5.8 grades of plain bolts of frid are improved to 9.8 grade high-strength bolt of rear end plates;

2, the snub pulley device of a kind of New-type plate rock feeder of design, comprise that (1) satisfy under the situation of on-the-spot mud ore deposit production requirement at strength and stiffness, upper supporting roller is designed to 18 groups, oad diameter * length=long roller carrier shaft the device of the solid horizontal ladder of (Φ 90～Φ 190) * (2170～2300) mm, quantity reduces nearly 6 times, has increased spacing and the apron space of upper supporting roller, stops to pile up the mud ore deposit, get into smooth can be more steady for rock feeder like this, so rotating load is littler more flexible; (2) long roller carrier shaft of solid horizontal ladder of design, its oad diameter * length=(Φ 90～Φ 115) * 2250mm; At the long roller carrier shaft device of level two ends, ingenious application TRIZ mistake proofing--space separation method designing technique, design a kind of external cast iron solid housing, in order to separate the intrusion in mud ore deposit, the mine belt outside is being transported in the bearing seat design, avoid bearing to advance Ni Kuang, satisfy the ore deposit production requirement of on-the-spot mud, the upper supporting roller bearing felt is designed to three road labyrinth seals, improve the reliability of bearing felt, stop the mud ore deposit and enter bearing and influence bearing life, design in the bearing wide serially 3518 simultaneously, improve the ability to bear to harsh environment and load of bearing; Design 3518 cast-iron chock lubricator cups simultaneously, change former bearing can't be realized intermittent oiling in fortune mine belt the inside disadvantage, realize the bearing intermittent oiling; (3) on solid pop-up roll shaft the big sleeve of (Φ 90～Φ 115) * 2250 designs locate, support and driving chain, big sleeve is supported in each assembling about on long roller carrier shaft, oad external diameter/internal diameter * length=(Φ 165～Φ 185)/Φ 115 * (90～the 220)/220mm of big sleeve, purpose for locate, support and driving chain; (4) on the long roller carrier shaft of solid level (Φ 90～Φ 115) * 2250, design a kind of small sleeve that supports the fortune mine belt, small sleeve is supported in each assembling about on long roller carrier shaft, oad external diameter/the internal diameter of small sleeve * length=Φ 165/ Φ 115 * 100mm, purpose is in order to support and transmission fortune mine belt, transportation ore; (5) in order to prevent large and small sleeve play, at 4 blocks of long and short steel plates of anti-channeling of large and small sleeve both sides design, plate size is respectively 20 * 20 * 280mm, and 20 * 20 * 200mm is welded to connect, and weld seam is continuously, welding and assembling height K 〉=20mm; In the middle of big sleeve, design driving chain positioning step, positioning step height * width=20 * 90mm, oad D185/D165 * 90mm, purpose is the fortune mine belt sideslip in order to prevent that the driving chain end float misalignment from causing, the fracture of fortune mine belt takes place, and driving chain is broken, is leaked the huge accident such as increase in ore deposit, load and takes place; In large and small sleeve outside, design countersunk bolt hole, uniform four, two location respectively, design two kinds of M16～M20 on the sleeve respectively, M10～M14 tapped bore installs high strength tightening location countersunk bolt diameter * degree of depth=(mm of M16～M20) * (30～40), (mm of M10～M14) * (30～40) then respectively; Two kinds in Design Orientation hole on roller carrier shaft simultaneously, the knock hole oad is respectively diameter * degree of depth=(Φ 18～Φ 22) * (3～5) mm, (Φ 12～Φ 16) * (3～5) mm, corresponding respectively with the knock hole of large and small sleeve outside, simultaneously big small sleeve tightening dowel bolt is designed to 9.8 grade high-strength dowel bolts, purpose is loosening in order to prevent big small sleeve; (6) the pop-up roll shaft is free-running fit with big small sleeve, and the tolerance on fit code is Φ 115 C8/b7; (7) on the long roller carrier shaft of level, the designed size wear sleeve, the sleeve material is designed to wear-resisting high hardness material 40CrMo, reduces the replacing number of times of stop sleeve, and purpose is in order to prevent two types big small sleeve wearing and tearing; (8) at the long roller carrier shaft of level two ends designs axle head door and bearing gland, prevent that the bearing string is moving, door and axle are with (the mm bolt of M12～M24) * (30～40); (9) tightening is large and small to be bolted on the pop-up roll shaft large and small sleeve by immersing oneself in, in large and small sleeve outside, design uniform four, two location respectively and immerse oneself in (bolt) hole, in big sleeve outside, design uniform four location counter bores, counter bore size diameter * degree of depth=(Φ 28～Φ 32) * (10～14) mm designs tapped bore below counter bore, tapped bore is of a size of M16～M20; In the small sleeve outside, uniform two location counter bores, counter bore size diameter * degree of depth=(Φ 18～Φ 22) * (6～10) mm designs tapped bore below counter bore, bolt hole is of a size of M10～M14 tapped bore);

3, design a kind of snub pulley device of New-type plate rock feeder: it comprises the long roller carrier shaft device of a kind of horizontal ladder of design (1), it is characterized in that satisfying under the situation of on-the-spot mud ore deposit production requirement at strength and stiffness, remove original short and thick snub pulley, oad diameter * length=(Φ 115～Φ 155) * (90～210) mm, 64 groups of quantity, ingenious design is designed to 6 groups with snub pulley, oad diameter * length=(Φ 100～Φ 140) * (2230～2250) mm, quantity reduces nearly 10 times, remove 64 groups of short and thick snub pulleys and support beam, spacing and the apron space of snub pulley have been increased, stop to pile up the mud ore deposit, get into smooth can be more steady for rock feeder like this, so rotating load is littler more flexible; (2) the long roller carrier shaft device of a kind of level of design is characterized in that designing a long roller carrier shaft of solid horizontal ladder, its oad diameter * length=(Φ 100～Φ 140) * 2240mm; (3) at the long roller carrier shaft device of level two ends, it is characterized in that designing a kind of external cast iron solid housing, in order to separate the intrusion in mud ore deposit, the mine belt outside is being transported in the bearing seat design, ingenious application space separation method designing technique avoids bearing to advance Ni Kuang, satisfies the ore deposit production requirement of on-the-spot mud; (4) the long Idler bearing of a kind of level of design, it is characterized in that intensity and rigidity in order to improve the snub pulley bearing, design snub pulley bearing is improved to 3520 by 208, and light and narrow series is improved to wide series in the mine, improves the ability to bear to harsh environment and load of bearing; (5) the long Idler bearing sealing arrangement of a kind of level of design is characterized in that designing the snub pulley bearing felt and is sealed by U-shaped, is improved to lip packing, improves the reliability of bearing felt, stops the mud ore deposit and enters bearing and influence bearing life; (6) on the long roller carrier shaft of solid level, about respectively design a kind of support ring that supports transmission fortune mine belt, it is characterized in that substituting former support driving chain snub pulley Φ 115/ Φ 155 * (90～210) mm device, be designed to the long roller carrier shaft of solid level (Φ 90～Φ 115) * 2250mm now, respectively assemble support ring about on long roller carrier shaft, oad external diameter/internal diameter * the length of support ring=(Φ 320～Φ 330)/Φ 110 * (100～200) mm, purpose is in order to support and the backhaul of transmission fortune mine belt; (7) on the long roller carrier shaft of solid level, about respectively design a kind of positioning step that assembles support ring, it is characterized in that at solid axle design anti-channeling positioning step Φ 110/(Φ 125～Φ 130) * (100～200) mm, anti-channeling shoulder height * length=(15～20) * (100～200) mm, purpose prevent the stressed back of support ring play on solid axle; (8) on the long roller carrier shaft of solid level, loosening in order to prevent support ring, about each designs fix key, oad length * wide * thick=(160～200) * (26～30) * (16～20) are installed on the solid axle then; (9) at the long roller carrier shaft of solid level, the design support ring, it is characterized in that making things convenient for for assemble, overhaul, replacing etc., the design support ring be about two semicircles, gap of two semicircles is 1～3mm about it, install then four fastening bolts (mm of M20～M24) * (60～80), purpose is in order to strengthen the connection of axle and support ring; (10) in the cast-iron chock outside, design arc installation door opening, it is characterized in that designing arc installation door opening for better installation shaft bearing, do not weaken frame strength and rigidity simultaneously; (11) on the long roller carrier shaft of level, design wear-resisting support ring, it is characterized in that the support ring material is designed to wear-resisting high hardness material 40CrMo, reduces the replacing number of times of support ring in order to prevent the support ring wearing and tearing; (12) at the long roller carrier shaft of level two ends, designed the axle head door, it is characterized in that at the long roller carrier shaft of solid level two ends, moving in order to prevent the bearing string, designed the axle head door, door and axle are with (the mm bolt of M12～M24) * (30～40); (13) on cast-iron chock, the design lubricator cup is characterized in that for better lubricating bearings, designs 3520 cast-iron chock intermittent oiling lubricating cups, realizes the bearing intermittent oiling, changes former bearing in fortune mine belt the inside, can't realize the disadvantage of intermittent oiling; (14) a kind of positioning and fixing support ring bolt of design, it is characterized in that connecting, locate intensity in order to improve subiculum roll shaft upper support ring, prevent that bolt fracture from causing that the support ring string is moving, is designed to 9.8 grade high-strength dowel bolts with fixed pedestal ring attachment bolt by common 4.8 grades; (15) at the long roller carrier shaft of level two ends, design fortune mine belt positioning step, oad is (Φ 320～Φ 330) * (100～200), it is characterized in that transporting the fortune mine belt sideslip that the mine belt play causes in order to prevent, causes and breaks the fortune mine belt, leaks the ore deposit, the huge accident such as increase of load takes place.

High mouthful of iron ore has 4 platen formula rock feeders, every rock feeder has 18 pop-up roll shafts, 6 subiculum roll shafts, 105 combination frids are formed rock feeder by driving chain, life-span is improved the back, and can to save rock feeder consumable accessory spare part expense every year be surplus in the of 361.3 ten thousand yuan, and mine belt foundry loam ore deposit is transported in solution and upper and lower carrying roller advances difficult problems such as mud ore deposit, reduces on-the-spot long-pending ore deposit, alleviates working strength of workers.Improve the fault that the back reduces rock feeder, improve the operating rate of rock feeder, satisfy the requirement of intermediate crusher choke feed; Effectively reduce crusher simultaneously and treat the product time, improve the broken ore deposit time of crusher, effectively reduce the sticking ore deposit of frid, upper and lower carrying roller enters the ore deposit, alleviates working strength of workers, welcome by field worker.

Claims (4)

1. a plate belt feeder comprises fortune mine belt, upper supporting roller, snub pulley, frame, driver train; The fortune mine belt comprises combination frid and driving chain, and the combination frid comprises frid, connecting panel, stay bearing plate, vertically gusset and horizontal gusset, vertically gusset and laterally gusset between connecting panel and frid, be connected by screw between connecting panel and the stay bearing plate; Frid is by being bolted on the driving chain, and about driving chain has two groups, a plurality of combination frids are together in series along the driving chain length direction and constitute the fortune mine belt; Upper supporting roller is positioned at fortune mine belt supported underneath fortune mine belt and driving chain; Snub pulley supports and transmission backhaul fortune mine belt; Frame comprises column, support beam; It is characterized in that: described fortune mine belt is plane fortune mine belt, and frid is for being horizontally disposed with, and described frid is provided with mine blocking plate along the length both sides, and the frid front end is provided with the arc closing plate, and the thickness of frid increases to 22mm; Described upper supporting roller is the long carrying roller of solid level, the upper supporting roller below is provided with pillar stiffener, big by immersing oneself in tightly to order on solid pop-up roll shaft, stove bolt is combined with greatly, small sleeve, it is free-running fit with axle, greatly, four blocks of anti-channeling steel plates of small sleeve both sides design, design driving chain positioning step in the middle of big sleeve, simultaneously at the pop-up roll shaft knock hole is set, with greatly, the knock hole of small sleeve outside is corresponding, axle head door and bearing gland are set, door is fixed with high strength bolt with axle, is provided with external cast iron solid housing at pop-up roll shaft two ends, and cast-iron chock is provided with lubricator cup; Described snub pulley device comprises a long roller carrier shaft of solid horizontal ladder, about the long roller carrier shaft of solid level, respectively be provided with support ring and positioning step, support and transmission backhaul fortune mine belt, the support ring two ends are respectively equipped with retainingf key, are provided with external cast iron solid housing at the long roller carrier shaft device of level two ends, and bearing seat is provided with lubricator cup, at the long roller carrier shaft of level two ends, designed the axle head door, door is used bolt with axle, is provided with fortune mine belt positioning step at the long roller carrier shaft of level two ends; Described frame is welded by 600 I-beam sections; Rock feeder also comprises cover body, and cover body is inverted U-shaped, and vertical wall is provided with liner plate in the cover body, and the liner plate below connects the sealing square steel, and the cover body outside is provided with support beam.

2. plate belt feeder according to claim 1, it is characterized in that: the radius of the radian of described frid front end arc closing plate is R70～R90 mm.

3. plate belt feeder according to claim 1, it is characterized in that: described cover body interior lining panel is divided into upper and lower two kinds, and thickness is respectively 40,80mm, and described cover body interior lining panel is 7 ~ 13mm with the gap of fortune mine belt.

4. plate belt feeder according to claim 1, it is characterized in that: described snub pulley bearing felt is lip packing by the U-shaped seal en-hancement, is provided with arc installation door opening in snub pulley bearing seat outside.

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