CN113443346A - Mining bottom-chain-free right-angle scraper conveyor - Google Patents
Mining bottom-chain-free right-angle scraper conveyor Download PDFInfo
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- CN113443346A CN113443346A CN202110596930.8A CN202110596930A CN113443346A CN 113443346 A CN113443346 A CN 113443346A CN 202110596930 A CN202110596930 A CN 202110596930A CN 113443346 A CN113443346 A CN 113443346A
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- chain
- scraper
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- angle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/04—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors for moving bulk material in open troughs or channels
- B65G19/06—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors for moving bulk material in open troughs or channels the impellers being scrapers similar in size and shape to the cross-section of the trough or channel
- B65G19/10—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors for moving bulk material in open troughs or channels the impellers being scrapers similar in size and shape to the cross-section of the trough or channel and attached to a pair of belts, ropes or chains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/20—Traction chains, ropes, or cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/22—Impellers, e.g. push-plates, scrapers; Guiding means therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/28—Troughs, channels, or conduits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/22—Arrangements or mountings of driving motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pusher Or Impeller Conveyors (AREA)
- Framework For Endless Conveyors (AREA)
Abstract
The invention provides a mining right-angle scraper conveyor without a bottom chain, which comprises: the scraper chain is positioned on the upper surface of the conveying groove, the first variable-angle middle groove is in a right trapezoid shape, the second variable-angle conveying groove is also in a right trapezoid shape, a right-angle side of the first variable-angle middle groove is in pin joint with one end of the second variable-angle conveying groove, a bevel edge of the first variable-angle middle groove is in pin joint with a bevel edge of the second variable-angle conveying groove, the bevel edge of the first variable-angle middle groove and the bevel edge of the second variable-angle conveying groove form a 90-degree angle, and the right-angle side of the second variable-angle middle groove is connected with the transition groove; when the mine opening is at an angle of 90 degrees, the first variable angle middle groove and the second variable angle middle groove are installed at the position needing to turn, and the first variable angle middle groove and the second variable angle middle groove rotate 90 degrees through the turning assembly, so that the scraper conveyor can be installed.
Description
Technical Field
The invention relates to the technical field of scraper conveyors, in particular to a bottomless chain right-angle scraper conveyor for mining.
Background
As is well known, a coal mine underground fully-mechanized mining working surface is used as a first production site of coal, and in the underground fully-mechanized mining process, a mine hole is not straight and has certain angles.
Disclosure of Invention
In view of the above, the invention provides a bottomless chain right-angle scraper conveyor for mining, which is used for solving the technical problem that the scraper conveyor is generally straight and cannot be applied when a mine hole is a right angle.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a bottomless chain right angle scraper conveyor for mining, comprising: aircraft nose, tail, scrape chain, conveyer trough, the aircraft nose is located the one end of conveyer trough, the tail is located the other end of conveyer trough, it is located to scrape the chain the upper surface of conveyer trough, the conveyer trough includes: the coal transporting device comprises a middle trough assembly, transition troughs and cable troughs, wherein the middle trough assembly is connected to form a coal transporting track, two ends of the middle trough assembly are respectively connected with one end of each transition trough, the other end of one transition trough is connected with the machine head, the other end of the other transition trough is connected with the machine tail, and the middle trough assembly comprises: a first variable angle middle groove, a second variable angle middle groove, a middle groove and a turning component, wherein the first variable angle middle groove is in a right trapezoid shape, the second variable angle middle groove is also in a right trapezoid shape, the right-angle side of the first variable angle middle groove is in pin joint with one end of the second variable angle middle groove, the bevel edge of the first variable angle middle groove is in pin joint with the bevel edge of the second variable angle middle groove, the bevel edge of the first variable angle middle groove and the bevel edge of the second variable angle middle groove form 90 degrees, the right-angle edge of the second variable angle middle groove is connected with the transition groove, and one end of the turning component is connected with the first variable angle middle groove, and the other end of the turning component is connected with the second variable angle middle groove, so that the scraper conveyor can rotate 90 degrees at the first variable angle middle groove and the second variable angle middle groove.
Preferably, the first variable angle central slot comprises: the first supporting plate, the first baffle ledge, the first shovel ledge and the elastic baffle, wherein two sides of the first supporting plate are respectively connected with the first shovel ledge and the first baffle ledge, and the second variable-angle middle groove comprises: the length of the first baffle is greater than that of the second baffle, two sides of the second baffle are respectively connected with the first baffle and the second baffle, one end of the first support plate is in pin joint with one end of the second support plate, the other end of the first support plate is connected with the middle groove on the same side, the other end of the second support plate is connected with the transition groove on the same side, the ledge of the first baffle is connected with the first baffle through the elastic baffle, and the ledge of the first baffle is connected with the second baffle through the turning assembly.
Preferably, the turning assembly comprises: the first bearing seat, the roller and the second bearing seat are sequentially sleeved on the shaft, two ends of the first bearing seat are respectively in threaded connection with the upper portions of the first shovel board ledge and the second baffle, two ends of the second bearing seat are respectively in threaded connection with the lower portions of the first shovel board ledge and the second baffle, the roller is located between the first bearing seat and the second bearing seat and is in contact with the upper surfaces of the first supporting plate and the second supporting plate, and the shaft is located at the joint of the first supporting plate and the second supporting plate.
Preferably, the aircraft nose sets up first sprocket shaft group, first lifter, the tail sets up second sprocket shaft group, second lifter, first sprocket shaft group, second sprocket shaft group with scrape the meshing of scraper chain and form complete closed loop and be in circular motion is done to the top of conveyer trough, first lifter is located between first sprocket shaft group and the conveyer trough, the second lifter is located between second sprocket shaft group and the conveyer trough.
Preferably, the head and the tail are further provided with power parts, the power part of the head is connected with the first chain wheel shaft group, and the power part of the tail is connected with the second chain wheel shaft group.
Preferably, the scraper chain comprises: the scraper component is fixedly connected with the chain, the other end of the scraper component is a free end, the chain is meshed with the first chain wheel shaft group and the second chain wheel shaft group to form a complete closed loop and moves circularly above the conveying groove, the chain is meshed with the first chain wheel shaft group and the second chain wheel shaft group to form a complete closed loop, the axis of the chain is perpendicular to the conveying groove, and the chain drives the scraper component to move on the conveying groove to convey materials on the conveying groove.
Preferably, the squeegee assembly comprises: the scraper blade body, walking wheel, the one end of scraper blade body with chain fixed connection, the other end of scraper blade body is the free end, the walking wheel is located the lower part of scraper blade body free end, just the walking wheel with the upper surface contact of conveyer trough, the walking wheel provides the support for the scraper blade body motion in-process.
Preferably, the squeegee body comprises: the chain bending machine comprises a straight line part, a one-way rotating button and a bending part, wherein the straight line part is rotatably connected with one end of the bending part through the one-way rotating button, the straight line part is fixedly connected with the chain, the lower end of the other end of the bending part is connected with a walking wheel, and the straight line part is positioned on the same straight line with the first lifting rod and the second lifting rod.
Preferably, the spacing between adjacent flight bodies is greater than the circumference of the first set of sprocket shafts.
Preferably, the diameter of the first sprocket shaft group is greater than the length of the flight body.
According to the technical scheme, in the bottomless chain right-angle scraper conveyor for mining provided by the invention, the nose is positioned at one end of the conveying groove, the tail is positioned at the other end of the conveying groove, the scraper chain is positioned on the upper surface of the conveying groove, and the conveying groove comprises: the coal transporting device comprises a middle trough assembly, transition troughs and cable troughs, wherein the middle trough assembly is connected to form a coal transporting track, two ends of the middle trough assembly are respectively connected with one end of each transition trough, the other end of one transition trough is connected with the machine head, the other end of the other transition trough is connected with the machine tail, and the middle trough assembly comprises: a first variable angle middle groove, a second variable angle middle groove, a middle groove and a turning component, wherein the first variable angle middle groove is in a right trapezoid shape, the second variable-angle conveying groove is also in a right-angled trapezoid shape, the right-angled edge of the first variable-angle middle groove is in pin joint with one end of the second variable-angle conveying groove, the bevel edge of the first variable-angle middle groove is in pin joint with the bevel edge of the second variable-angle conveying groove, the bevel edge of the first variable-angle middle groove and the bevel edge of the second variable-angle conveying groove form 90 degrees, the right-angle edge of the second variable-angle middle groove is connected with the transition groove, and one end of the turning component is connected with the first variable angle middle groove, and the other end of the turning component is connected with the second variable angle conveying groove, so that the scraper conveyor can rotate 90 degrees at the first variable angle middle groove and the second variable angle conveying groove. When the mine hole is at an angle of 90 degrees, the first variable angle middle groove and the second variable angle middle groove are installed at the positions needing turning, and the first variable angle middle groove and the second variable angle middle groove are rotated by 90 degrees through the turning assembly, so that the scraper conveyor can be installed.
Drawings
FIG. 1 is a front view of a bottomless chain right angle flight conveyor for mining;
FIG. 2 is a top view of a bottomless chain right-angle flight conveyor for mining;
FIG. 3 is a top view of the scraper chain run;
FIG. 4 is a front view of the tail;
FIG. 5 is a top view of the tail;
FIG. 6 is a top view of the tail (with the return coal cover removed);
FIG. 7 is a first top view of the installation position of the power part at the tail end (with the coal return cover removed);
FIG. 8 is a second top view of the power unit mounting position (with the coal return cover removed) of the tail;
FIG. 9 is a third top view of the installation position of the power unit at the tail (with the coal return cover removed);
FIG. 10 is a front view of the handpiece;
FIG. 11 is a top view of the handpiece;
FIG. 12 is a first top view of the mounting location of the power section of the handpiece;
FIG. 13 is a second top view of the power section of the handpiece;
FIG. 14 is a third top view of the power section of the handpiece;
FIG. 15 is a left side view of a conveying chute for a scraper conveyor of the related art of a comparative example;
FIG. 16 is a front view of the center tank;
FIG. 17 is a top view of the central channel;
FIG. 18 is a left side view of the center tank;
FIG. 19 is a front view of the turn assembly;
FIG. 20 is a top view of the turn assembly;
in the figure: the scraper conveyor comprises a conveying trough 1 for the scraper conveyor in the prior art, a baffle ledge 2 in the prior art, a shovel ledge 3 in the prior art, a shovel plate 31 in the prior art, a middle plate 4 in the prior art and a bottom plate 5 in the prior art.
A bottom-chain-free right-angle scraper conveyor 10 for mining, a bottom-chain-free scraper conveyor 10, a head 100, a first sprocket shaft group 110, an internal gear 111, an external gear 112, a power part 120, a head frame body 130, a first chain-discharging side 131, a first connecting plate 132, a first lifting rod 133, a tail 200, a second sprocket shaft group 210, a tail frame body 220, a second chain-discharging side 221, a telescopic chain tightening assembly 222, a moving frame 2221, a detachable cover plate 22211, a telescopic cylinder 2222, a first telescopic cylinder 22221, a first connecting pin hole 222211, a second connecting pin hole 222212, a second telescopic cylinder 22222, a third connecting pin hole 222221, a fourth connecting pin hole 222222, a sliding groove 223, a coal return cover 224, a second connecting plate 225, a second lifting rod 226, a scraper chain 300, a scraper assembly 310, a scraper body 311, a straight line 3111, a bent part 3112, a one-way rotating button 3113, a chain button 320, a conveying groove 400, a conveying groove 410, a middle aqueduct passage 420, a middle aqueduct passage assembly 420, and a middle aqueduct passage assembly 420, The first variable angle middle groove 421, the first support plate 4211, the first baffle ledge 4212, the first shovel ledge 4213, the elastic baffle 4214, the second variable angle middle groove 422, the second support plate 4221, the first baffle 4222, the second baffle 4223, the middle groove 423, the shovel ledge 4231, the shovel plate 42311, the convex connector 423111, the concave connector 423112, the first C-shaped groove 42312, the support plate 4232, the dumbbell pin socket 42321, the baffle ledge 4233, the second C-shaped groove 42331, the rack seat 42332, the rack 42333, the push lug 42334, the baffle 42335, the turning component 424, the first bearing seat 4241, the roller 4242, the second bearing seat 4243, the shaft 4244 and the cable groove 430.
Detailed Description
The technical solutions and effects of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings of the present invention.
Referring to fig. 1-3, a bottomless chain right angle scraper conveyor 10 for mining includes: aircraft nose 100, tail 200, scraper chain 300, conveyer trough 400, aircraft nose 100 is located the one end of conveyer trough 400, tail 200 is located the other end of conveyer trough 400, scraper chain 300 is located the upper surface of conveyer trough 400, conveyer trough 400 includes: a middle trough assembly 420, a transition trough 410, and a cable trough 430, wherein a plurality of the middle trough assemblies 420 are connected to form a coal transportation rail, two ends of the middle trough assembly 420 are respectively connected to one end of the transition trough 410, one end of the transition trough 410 is connected to the machine head 100, the other end of the other transition trough 410 is connected to the machine tail 200, the cable trough 430 is located at one side of the middle trough 423, and the middle trough assembly 420 comprises: a first variable angle middle groove 421, a second variable angle middle groove 422, a middle groove 423, a turning component 424, wherein the first variable angle middle groove 421 is in a right trapezoid shape, the second variable angle middle groove 422 is also in a right trapezoid shape, the right-angled side of the first variable angle middle groove 421 is in pin joint with one end of the second variable angle middle groove 422, the hypotenuse of the first variable angle middle groove 421 is in pin joint with the hypotenuse of the second variable angle middle groove 422, the hypotenuse of the first variable angle middle groove 421 and the hypotenuse of the second variable angle middle groove 422 form a 90 degree angle, the hypotenuse of the second variable angle middle groove 422 is connected with the transition groove 410, and the turning component 424 is connected with the first variable angle middle groove 421 at one end and the second variable angle middle groove 422 at the other end, so that the scraper conveyor is connected with the second variable angle middle groove 422 at the first variable angle middle groove 421, the second variable angle middle groove 422, The second variable angle middle groove 422 can rotate 90 degrees, when the mine hole is at an angle of 90 degrees, the first variable angle middle groove 421 and the second variable angle middle groove 422 are installed at the position needing to turn, and the first variable angle middle groove 421 and the second variable angle middle groove 422 are rotated 90 degrees through the turning assembly 424, so that the scraper conveyor can be installed.
Further, referring to fig. 19 and 20, the first variable angle central groove 421 includes: a first support plate 4211, a first baffle ledge 4212, a first shovel ledge 4213, and an elastic baffle 4214, wherein two sides of the first support plate 4211 are respectively connected to the first shovel ledge 4213 and the first baffle ledge 4212, and the second variable-angle middle trough 422 includes: the length of the first baffle 4222 is greater than that of the second baffle 4223, two sides of the second baffle 4221 are respectively connected with the first baffle 4222 and the second baffle 4223, one end of the first baffle 4211 is in pin joint with one end of the second baffle 4221, the other end of the first baffle 4211 is connected with the middle groove 423 on the same side, the other end of the second baffle 4221 is connected with the middle groove 423 on the same side, the first baffle ledge 4212 is elastically connected with the first baffle 4222 through the elastic baffle 4214, and the first baffle ledge 4213 is connected with the second baffle 4223 through the turning assembly 424; when the first variable angle midportion groove 421 and the second variable angle midportion groove 422 make a turn, the first apron ledge 4212 is connected to the first apron 4222 by the elastic apron 4214 to prevent coal from leaking out between the first apron ledge 4212 and the first apron 4222 during the turn, and the elastic apron 4214 may be: elastic steel plate, belt.
Further, the turning assembly 424 includes: the first bearing seat 4241, the roller 4242 and the second bearing seat 4243 are sequentially sleeved on the shaft 4244, two ends of the first bearing seat 4241 are respectively in threaded connection with the upper portions of the first shovel ledge 4213 and the second baffle 4223, two ends of the second bearing seat 4243 are respectively in threaded connection with the lower portions of the first shovel ledge 4213 and the second baffle 4223, the roller 4242 is located between the first bearing seat 4241 and the second bearing seat 4243 and is in contact with the upper surfaces of the first supporting plate 4211 and the second supporting plate 4221, and the shaft 4244 is located at the connection position of the first supporting plate 4211 and the second supporting plate 4221. When the first variable angle middle groove 421 and the second variable angle middle groove 422 are 90 °, when the scraper chain 300 passes through the first support plate 4211 and runs towards the second support plate 4221, the scraper chain 300 is in contact with the roller 4242, so that the scraper chain 300 at a turning position is prevented from having large friction on the first shovel ledge 4213 and the second stop plate 4223; and when the friction of the lower part of the roller 4242 is serious, the sequence of sequentially sleeving the first shaft 4244 bearing 4241, the roller 4242 and the second shaft 4244 bearing 4243 on the shaft 4244 can be reversed, so that the scraper chain 300 continuously rubs the part where the friction of the roller 4242 is not serious.
Further, referring to fig. 2, 10 to 14, the machine head 100 is provided with a first sprocket shaft group 110 and a first lifting rod 133, the machine tail 200 is provided with a second sprocket shaft group 210 and a second lifting rod 226, the first sprocket shaft group 110, the second sprocket shaft group 210 and the scraper chain 300 are engaged to form a complete closed loop to perform circular motion above the conveying trough 400, the first lifting rod 133 is located between the first sprocket shaft group 110 and the conveying trough 400, and the second lifting rod 226 is located between the second sprocket shaft group 210 and the conveying trough 400.
Further, the machine head 100 is provided with a first sprocket shaft group 110 and a first lifting rod 133, the machine tail 200 is provided with a second sprocket shaft group 210 and a second lifting rod 226, the first sprocket shaft group 110 and the second sprocket shaft group 210 are engaged with the scraper chain 300 to form a complete closed loop, and make a circular motion above the conveying trough 400, the first lifting rod 133 is located between the first sprocket shaft group 110 and the conveying trough 400, and the second lifting rod 226 is located between the second sprocket shaft group 210 and the conveying trough 400; the first and second lift pins 133, 226 are not located on the same side of the first and second sprocket sets 110, 210.
Further, the first sprocket shaft group 110 is the same as the second sprocket shaft group 210, and the first sprocket shaft group 110 includes: the inner gear 111 and the outer gear 112, the inner gear 111 and the outer gear 112 are meshed, the outer gear 112 is meshed with the chain 320, and the chain 320 drives the scraper to move on the conveying groove 400; the tooth part of the outer gear 112 to the shaft 4244 part of the outer gear 112 is a slope, so the tooth part of the outer gear 112 is thin, when the chain 320 drives the scraper body 311 to enter the tail 200 or the nose 100, the scraper body 311 can easily enter the upper surface of the outer gear 112, and the chain 320 is engaged.
When the coal blocks fall into the conveying groove 400, the inner gear 111 rotates to drive the outer gear 112 to rotate, the outer gear 112 is meshed with the scraper chain 300, the scraper chain 300 conveys the coal blocks in the conveying groove 400 to the machine head 100 from the machine tail 200 and then conveys the coal blocks out, the scraper chain 300 can horizontally move in the conveying groove 400, the power consumed by chain returning is reduced, the bottomless chain scraper conveyor does not need a chain discharging channel any more, and the height of the bottomless chain scraper conveyor is reduced.
Further, the axis 4244 of the external gear 112 and the internal gear 111 is perpendicular to the conveying groove 400; when the scraper chain 300 circularly moves parallel to the upper plane of the conveying groove 400, the axis 4244 of the outer gear 112 and the inner gear 111 is perpendicular to the conveying groove 400, and the chain 320 can be well meshed with the outer gear 112.
Further, referring to fig. 3 to 9, the tail 200 includes: the tail frame body 220 is provided with a second chain outlet side 221, the tail frame body 220 is connected to the conveying trough 400 at the second chain outlet side 221, the second chain outlet side 221 is used for the chain 320 to enter and exit, a power part 120 is further arranged on the outer side of the tail frame body 220, the power part 120 is located on any side of the tail frame body 220, which is not the second chain outlet side 221, the power part 120 is provided with a second coupling plate 225, the power part 120 is connected with the tail frame body 220 through the second coupling plate 225, the power part 120 is connected with the inner gear 111 through a worm gear, and the power part 120 is used for providing power for the second sprocket shaft group 210, so that the second sprocket shaft group 210 rotates to drive the scraper chain 300 to normally operate; and the power part 120 can be installed at one side of the power part 120 that can be accommodated by the frame body 220 according to the position of the mine hole, so that the installation of the machine tail 200 at the mine hole is more convenient and can be suitable for different mine holes.
Further, the power unit 120 can be installed at any position on the same side of the frame body 220 according to the position of the mine hole.
Further, the top of tailstock body 220 still sets up flexible tight chain subassembly 222, flexible tight chain subassembly 222 with tailstock body 220 both sides sliding connection, flexible tight chain subassembly 222 with second sprocket shaft group 210 can dismantle the connection, second sprocket shaft group 210 level sets up in tailstock body 220, makes the whole height of tail 200 reduces, is favorable to tail 200 is in the installation of mine opening.
Further, the sliding grooves 223 are symmetrically formed in two sides of the top of the frame body 220, the sliding grooves 223 and the second chain outlet side 221 are not located on the same side, and the sliding grooves 223 are slidably connected with the telescopic chain tightening assembly 222.
Further, the telescopic chain tensioner assembly 222 comprises: a movable frame 2221, a telescopic cylinder 2222, said telescopic cylinder 2222 comprises a first telescopic cylinder 22221, a second telescopic cylinder 22222, the first telescopic cylinder 22221 and the second telescopic cylinder 22222 are respectively positioned at both sides of the moving frame 2221, the movable frame 2221 is slidably connected with the sliding groove 223, the movable frame 2221 is connected with the second sprocket shaft group 210, a first connecting pin hole 222211 and a second connecting pin hole 222212 are arranged at two ends of the first telescopic cylinder 22221, a third connecting pin hole 222221 and a fourth connecting pin hole 222222 are arranged at two ends of the second telescopic cylinder 22222, the first telescopic cylinder 22221 is pinned to the sliding groove 223 and one side of the moving frame 2221 through the first connecting pin hole 222211 and the second connecting pin hole 222212, the second telescopic cylinder 22222 is pinned to the slide groove 223 and the other side of the moving frame 2221 through the third connecting pin hole 222221 and the fourth connecting pin hole 222222; when the scraper chain 300 is relatively loose, the first telescopic cylinder 22221 and the second telescopic cylinder 22222 are started, the first telescopic cylinder 22221 and the second telescopic cylinder 22222 drive the movable frame 2221 to move towards the side far from the second chain outlet side 221, the movable frame 2221 drives the second sprocket shaft group 210 to move towards the side far from the second chain outlet side 221, so that the scraper chain 300 is tensioned, thereby facilitating the operation of the scraper chain 300, if the scraper chain 300 needs to be maintained, the scraper chain 300 needs to be loosened, the first telescopic cylinder 22221 and the second telescopic cylinder 22222 are started, the first telescopic cylinder 22221 and the second telescopic cylinder 22222 drive the movable frame 2221 to move towards the side near the second chain outlet side 221, the movable frame 2221 drives the second sprocket shaft group 210 to also move towards the side near the second chain outlet side, thereby loosening the scraper chain 300, facilitating maintenance of the scraper chain 300.
Further, the movable frame 2221 is provided with a detachable cover plate 22211, and the detachable cover plate 22211 is located at the other end of the tailstock body 220 and is not located on the same side as the second out-link side 221.
Further, a semicircle is arranged in the middle of the detachable cover plate 22211, the radius of the semicircle is the same as the radius of the 4244 portion of the shaft of the external gear 112, the detachable cover plate 22211 is located below the lower portion of the tooth portion of the external gear 112, and when the second sprocket shaft group 210 needs to be maintained, the detachable cover plate 22211 is pulled out from the side away from the second chain outlet side 221, so that the second sprocket shaft group 210 is exposed, and the second sprocket shaft group 210 is detected and maintained.
Further, a coal return cover 224 is arranged at the top of the machine tail frame body 220, the coal return cover 224 is in threaded connection with the machine tail frame body 220, the coal return cover 224 is not in contact with the top of the second sprocket shaft group 210, and the coal return cover 224 prevents coal blocks from falling into the second sprocket shaft group 210 to affect the operation of the second sprocket shaft group 210.
Further, referring to fig. 10 to 14, the handpiece 100 includes: the scraper chain conveying device comprises a machine head frame body 130, wherein the machine head frame body 130 is provided with a first chain outlet side 131, the machine head frame body 130 is connected with the conveying groove 400 at the first chain outlet side 131, the first chain outlet side 131 is used for the chain 320 to enter and exit, the outer side of the machine head frame body 130 is also provided with a power part 120, the power part 120 is positioned at any side of the machine head frame body 130, which is not the first chain outlet side 131, the power part 120 is provided with a first connecting plate 132, the power part 120 is connected with the machine tail frame body 220 through the first connecting plate 132, the power part 120 is connected with the inner gear 111 through a worm gear, and the power part 120 is used for providing power for the first sprocket shaft group 110, so that the first sprocket shaft group 110 rotates to drive the scraper chain 300 to normally operate; and the power part 120 can be installed at one side of the power part 120 that can be accommodated by the frame body 220 according to the position of the mine hole, so that the installation of the machine tail 200 at the mine hole is more convenient and can be suitable for different mine holes.
Further, the power unit 120 can be installed at any position on the same side of the frame body 220 according to the position of the mine hole.
Further, referring to fig. 2 and 3, the scraper assembly 310 includes: the scraper blade comprises a scraper blade body 311 and travelling wheels 312, wherein one end of the scraper blade body 311 is fixedly connected with the chain 320, the other end of the scraper blade body 311 is a free end, the travelling wheels 312 are positioned at the lower part of the free end of the scraper blade body 311, the travelling wheels 312 are in contact with the upper surface of the conveying groove 400, and the travelling wheels 312 provide power for the scraper blade body 311 in the movement process; when scraper body 311 one end is fixed, when the other end is the free end, scraper body 311 is along with chain 320 moves forward, walking wheel 312 makes the resistance of the free end of scraper body 311 reduces, just scraper body 311 both ends can walk simultaneously, and scraper body 311 keeps walking with chain 320 is perpendicular always promptly, makes the in-process of scraper blade transported substance material, and the material can be carried away as far as possible, works as chain 320 drives scraper body 311 moves when first variable angle middle part groove 421, second variable angle middle part groove 422, scraper body 311's walking wheel 312 and the chain 320 of chain return or the portion 3112 contact of bending after being bent, avoids chain 320 of chain return to influence the normal operating of conveying chain.
Further, the squeegee body 311 includes: a straight portion 3111, a one-way rotating button 3113 and a bending portion 3112, wherein the straight portion 3111 is rotatably connected with one end of the bending portion 3112 through the one-way rotating button 3113, the straight portion 3111 is fixedly connected with the chain 320, the lower end of the other end of the bending portion 3112 is connected with a traveling wheel 312, and the straight portion 3111, the first lifting rod 133 and the second lifting rod 226 are located on the same straight line; when the scraper body 311 transports materials to the machine head 100, the motor drives the first lifting rod 133 to rise, the bent portion 3112 rotates along the direction of the one-way rotating button 3113 when the bent portion 3112 touches the first lifting rod 133, the bent portion 3112 is bent, then the first lifting rod 133 is lowered, the scraper body 311 enters the first sprocket shaft group 110, when the bent scraper body 311 is transported to the machine tail 200 from the machine head 100, the motor drives the second lifting rod 226 to rise, when the bent scraper body 311 enters the second sprocket shaft group 210, the second lifting rod 226 blocks the bent portion 3112 to straighten the bent portion to be in a straight line with the straight portion 3111, and the second lifting rod 226 is lowered, so that the chain 320 drives the scraper body 311 to continue to operate.
Further, the distance between adjacent scraper bodies 311 is greater than the circumference of the outer gear 112, and when the scraper bodies 311 rotate on the first sprocket shaft group 110 and the second sprocket shaft group 210, there is only one scraper assembly 310, so as to prevent the plurality of scraper assemblies 310 from rotating on the first sprocket shaft group 110 and the second sprocket shaft group 210, which affects the normal operation of the scraper.
Further, the distance between the chain 320 and the complete closed loop formed by the engagement of the first sprocket shaft group 110 and the second sprocket shaft group 210 on the conveying trough 400 is greater than the length of the scraper body 311; when the chain 320 moves circularly parallel to the upper plane of the conveying trough 400, the scrapers for conveying the materials and the bent scrapers do not affect each other.
Further, the length of the scraper body 311 is smaller than the diameter of the external gear 112.
Further, the width of the middle groove assembly 420 is greater than the width of the scraper body 311.
Further, referring to fig. 2, 16 to 18, the middle groove 423 includes: the scraper chain comprises a scraper ledge 4231, a supporting plate 4232 and a baffle ledge 4233, wherein the scraper ledge 4231 is connected with one end of the supporting plate 4232, the other end of the supporting plate 4232 is connected with the baffle ledge 4233, and the upper surface of the supporting plate 4232 provides a running space for the scraper chain 300 to convey materials. The scraper chain 300 moves horizontally on the upper surface of the supporting plate 4232, the chain 320 is not easy to be broken in the operation process of the scraper chain 300, the scraper chain 300 can be checked on the upper surface of the supporting plate 4232, once the chain 320 is broken, the scraper chain can be directly maintained on the upper surface of the supporting plate 4232, and the operation is convenient; and the height of the middle groove 423 is obviously reduced, thereby saving casting materials.
Further, a shovel plate 42311 is further arranged on the shovel plate ledge 4231, the shovel plate 42311 and the supporting plate 4232 are not on the same horizontal plane, and an included angle of 0-10 degrees is formed between the lower plane of the scraping plate and the extension line of the lower plane of the supporting plate 4232, so that the conveying trough 400 is more flexible in the turning process.
Further, the one end of shovel plate 42311 sets up protruding connecting piece 423111, the other end of shovel plate 42311 sets up concave connecting piece 423112, conveyer trough 400 passes through protruding connecting piece 423111 and concave connecting piece 423112 are connected with front and back spread groove, and it is more convenient, inseparable to connect.
Further, a first C-shaped groove 42312 is arranged inside the shovel plate ledge 4231, the shape of the first C-shaped groove 42312 can be adapted to the end of the scraper chain 300, the bottom of the first C-shaped groove 42312 is connected with one end of the supporting plate 4232 far away from the baffle ledge 4233, one end of the scraper chain 300 is pressed by the upper portion of the first C-shaped groove 42312, the scraper chain 300 is prevented from being separated from the upper portion of the supporting plate 4232, the upper portion of the first C-shaped groove 42312 is short, abrasion of the scraper chain 300 to the upper portion of the first C-shaped groove 42312 is reduced, and the service life of the scraper chain is prolonged.
Further, dumbbell pin sockets 42321 are respectively arranged in the width direction of the supporting plate 4232, so that the middle grooves 423 can be conveniently connected.
Furthermore, two rack rail seats 42332 are arranged at the upper part of the baffle ledge 4233, and the rack rail seats 42332 are positioned on the upper end surface of the baffle ledge 4233.
Further, a second C-shaped groove 42331 is arranged inside the baffle ledge 4233, the upper end of the second C-shaped groove 42331 is connected with one end of the baffle 42335, the bottom of the second C-shaped groove 42331 is connected with one end of the supporting plate 4232 far away from the shovel ledge 4231, the other end of the scraper chain 300 is pressed by the upper portion of the second C-shaped groove 42331, the scraper chain 300 is prevented from being separated from the upper portion of the supporting plate 4232, the upper portion of the second C-shaped groove 42331 is short, abrasion of the scraper chain 300 to the upper portion of the second C-shaped groove 42331 is reduced, and the service life of the scraper chain is prolonged.
Further, the second C-shaped groove 42331 is the same shape as the first C-shaped groove 42312.
Further, the length of the baffle 42335 is less than one fourth of the width of the supporting plate 4232, the cross section of the baffle 42335 is trapezoidal, when the scraper chain 300 moves to the position near the baffle ledge 4233 for chain return, the baffle 42335 can prevent a small amount of coal blocks falling off during the operation process of the coal mining machine from entering one side of the baffle ledge 4233 of the supporting plate 4232, so that the straight portion 3111 is prevented from contacting the coal blocks when the chain 320 drives the scraper body 311 to chain return, and the transportation of the material on the supporting plate 4232 is prevented from being influenced. And the included angle between the baffle 42335 and the extension line of the upper end of the second C-shaped groove 42331 is, so that the dropped coal briquette can slide down from the middle part of the supporting plate 4232, and the chat is convenient to drive the scraper blade body 311 to convey the material out.
Furthermore, a rack 42333 is further arranged on the upper end face of the baffle ledge 4233, the rack 42333 is mounted on the rack seat 42332, and a walking track is provided for the walking of the coal mining machine.
Further, a push ear 42334 is further arranged on the side surface of the baffle ledge 4233.
For ease of understanding, this will be further illustrated by the following comparative examples.
Comparative example:
referring to fig. 15, in the prior art, a chinese utility model patent such as patent No. CN201310257684.9 discloses a middle trough and a scraper conveyor 1 having the same, which includes a prior art shoveling ledge 3, a prior art baffle ledge 2, a prior art bottom plate 5, a prior art middle plate 4, the prior art shoveling ledge 3, the prior art baffle ledge 2, the prior art bottom plate 5, the prior art middle plate 4, and the prior art pushing lug connected together by welding; the middle groove in the prior art also comprises a bottom plate 5, the whole height of the middle groove is high, more materials are lost in casting and cannot be used in a short mine hole, the scraper chain 300 surrounds the whole middle plate in the operation process, the scraper chain 300 is difficult to detect, the scraper chain 300 is easy to break, and the scraper chain 300 is difficult to maintain after being broken; and the shovel board and the bottom plate among the prior art are located same horizontal plane, and the middle part groove collides easily at the in-process of turning, leads to the easy wearing and tearing of shovel board among the prior art.
Referring to fig. 18, the middle groove 423 of the drag chain-less scraper conveyor for mining according to the present invention includes: the scraper chain comprises a scraper ledge 4231, a supporting plate 4232 and a baffle ledge 4233, wherein the scraper ledge 4231 is connected with one end of the supporting plate 4232, the other end of the supporting plate 4232 is connected with the baffle ledge 4233, the baffle ledge 4233 is connected with a baffle 42335, one end of the baffle 42335 is connected with the baffle ledge 4233, the other end of the baffle 42335 is a free end, the upper surface of the supporting plate 4232 is a scraper chain 300 running space, and the baffle 42335 can prevent a small amount of coal blocks falling off in the running process of the coal mining machine from entering a chain returning channel to influence the running of the scraper chain 300. The utility model has no bottom plate in the prior art, and the height of the baffle ledge 4233 and the shovel board ledge 4231 is reduced by one third to one half compared with the prior art, so that the height of the whole conveying trough 400 is reduced, the conveying trough can adapt to shorter mine holes, materials can be saved in the casting process, the weight of the cast conveying trough 400 is obviously reduced, and the supporting plate 4232 selects the predetermined thickness according to the conveyed coal quantity and the size of the scraper chain 300, so that the conveying trough can meet the strength of material transportation; in the invention, the scraper chain 300 moves horizontally on the upper surface of the supporting plate 4232, the scraper chain 300 is not easy to be broken in the running process of the scraper chain 300, the scraper chain 300 can be checked on the upper surface of the supporting plate 4232, once the scraper chain 300 is broken, the scraper chain can be directly maintained on the upper surface of the supporting plate 4232, and the operation is convenient; according to the invention, a certain included angle is formed between the lower surface of the shovel plate 42311 and the lower surface of the supporting plate 4232, so that the conveying trough 400 is more flexible in the turning process, and the abrasion between the shovel plates 42311 is reduced.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A bottomless chain right-angle scraper conveyor for mining, comprising: aircraft nose, tail, scrape chain, conveyer trough, the aircraft nose is located the one end of conveyer trough, the tail is located the other end of conveyer trough, it is located to scrape the chain the upper surface of conveyer trough, the conveyer trough includes: the coal transporting device comprises a middle trough assembly, transition troughs and cable troughs, wherein the middle trough assembly is connected to form a coal transporting track, two ends of the middle trough assembly are respectively connected with one end of each transition trough, the other end of one transition trough is connected with the machine head, the other end of the other transition trough is connected with the machine tail, and the middle trough assembly comprises: a first variable angle middle groove, a second variable angle middle groove, a middle groove and a turning component, wherein the first variable angle middle groove is in a right trapezoid shape, the second variable angle middle groove is also in a right trapezoid shape, the right-angle side of the first variable angle middle groove is in pin joint with one end of the second variable angle middle groove, the bevel edge of the first variable angle middle groove is in pin joint with the bevel edge of the second variable angle middle groove, the bevel edge of the first variable angle middle groove and the bevel edge of the second variable angle middle groove form 90 degrees, the right-angle edge of the second variable angle middle groove is connected with the transition groove, and one end of the turning component is connected with the first variable angle middle groove, and the other end of the turning component is connected with the second variable angle middle groove, so that the scraper conveyor can rotate 90 degrees at the first variable angle middle groove and the second variable angle middle groove.
2. The mining bottom-chain-less right angle scraper conveyor of claim 1, wherein the first variable angle center trough comprises: the first supporting plate, the first baffle ledge, the first shovel ledge and the elastic baffle, wherein two sides of the first supporting plate are respectively connected with the first shovel ledge and the first baffle ledge, and the second variable-angle middle groove comprises: the length of the first baffle is greater than that of the second baffle, two sides of the second baffle are respectively connected with the first baffle and the second baffle, one end of the first support plate is in pin joint with one end of the second support plate, the other end of the first support plate is connected with the middle groove on the same side, the other end of the second support plate is connected with the transition groove on the same side, the ledge of the first baffle is connected with the first baffle through the elastic baffle, and the ledge of the first baffle is connected with the second baffle through the turning assembly.
3. The mining bottom-chain-less right angle scraper conveyor of claim 2, wherein the turning assembly comprises: the first bearing seat, the roller and the second bearing seat are sequentially sleeved on the shaft, two ends of the first bearing seat are respectively in threaded connection with the upper portions of the first shovel board ledge and the second baffle, two ends of the second bearing seat are respectively in threaded connection with the lower portions of the first shovel board ledge and the second baffle, the roller is located between the first bearing seat and the second bearing seat and is in contact with the upper surfaces of the first supporting plate and the second supporting plate, and the shaft is located at the joint of the first supporting plate and the second supporting plate.
4. The mining bottom-chain-free right-angle scraper conveyor according to claim 3, wherein the head is provided with a first sprocket shaft group and a first lifting rod, the tail is provided with a second sprocket shaft group and a second lifting rod, the first sprocket shaft group and the second sprocket shaft group are meshed with the scraper chain to form a complete closed loop to do circular motion above the conveying trough, the first lifting rod is positioned between the first sprocket shaft group and the conveying trough, and the second lifting rod is positioned between the second sprocket shaft group and the conveying trough.
5. The mining bottom-chain-free right-angle scraper conveyor as claimed in claim 4, wherein the head and the tail are further provided with power parts, the power part of the head is connected with the first chain wheel shaft set, and the power part of the tail is connected with the second chain wheel shaft set.
6. The mining bottom-chain-less right-angle scraper conveyor of claim 5, characterized in that the scraper chain comprises: the scraper component is fixedly connected with the chain, the other end of the scraper component is a free end, the chain is meshed with the first chain wheel shaft group and the second chain wheel shaft group to form a complete closed loop and moves circularly above the conveying groove, the chain is meshed with the first chain wheel shaft group and the second chain wheel shaft group to form a complete closed loop, the axis of the chain is perpendicular to the conveying groove, and the chain drives the scraper component to move on the conveying groove to convey materials on the conveying groove.
7. The mining bottom-chain-less right angle scraper conveyor of claim 6, wherein the scraper assembly comprises: the scraper blade body, walking wheel, the one end of scraper blade body with chain fixed connection, the other end of scraper blade body is the free end, the walking wheel is located the lower part of scraper blade body free end, just the walking wheel with the upper surface contact of conveyer trough, the walking wheel provides the support for the scraper blade body motion in-process.
8. The mining bottom-chain-less right angle scraper conveyor of claim 7, wherein the scraper body comprises: the chain bending machine comprises a straight line part, a one-way rotating button and a bending part, wherein the straight line part is rotatably connected with one end of the bending part through the one-way rotating button, the straight line part is fixedly connected with the chain, the lower end of the other end of the bending part is connected with a walking wheel, and the straight line part is positioned on the same straight line with the first lifting rod and the second lifting rod.
9. The mining bottom-chain-less right angle scraper conveyor of claim 8, wherein the spacing between adjacent scraper bodies is greater than the circumference of the first set of sprocket shafts.
10. The mining bottom-chain-less right angle scraper conveyor of claim 9, wherein the diameter of the first set of sprocket shafts is greater than the length of the scraper body.
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| CN202110596930.8A CN113443346B (en) | 2021-05-31 | 2021-05-31 | Mining bottom-chain-free right-angle scraper conveyor |
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| CN202110596930.8A CN113443346B (en) | 2021-05-31 | 2021-05-31 | Mining bottom-chain-free right-angle scraper conveyor |
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| CN113443346B CN113443346B (en) | 2023-03-14 |
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| GB1112369A (en) * | 1964-12-15 | 1968-05-01 | Gewerk Eisenhuette Westfalia | Scraper conveyors |
| SU604762A1 (en) * | 1974-07-19 | 1978-04-30 | Mironov Nikolaj T | Scraper conveyer intermediate section |
| CN202784591U (en) * | 2012-09-03 | 2013-03-13 | 溧阳市永立农牧机械有限公司 | Horizontal scraper machine |
| CN203111979U (en) * | 2013-03-22 | 2013-08-07 | 河北工程大学 | Middle trough of scraper conveyor |
| CN211109414U (en) * | 2019-11-06 | 2020-07-28 | 中煤张家口煤矿机械有限责任公司 | Scraper conveyor capable of guiding large-angle turning through arc contact of scraper and chute |
| CN212126505U (en) * | 2020-01-20 | 2020-12-11 | 江山永利百合实业有限公司 | Scraper chain with plastic part |
| CN112389953A (en) * | 2020-11-08 | 2021-02-23 | 冀凯河北机电科技有限公司 | Lifting baffle plate assembly for gangue backfill scraper conveyor |
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2021
- 2021-05-31 CN CN202110596930.8A patent/CN113443346B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1112369A (en) * | 1964-12-15 | 1968-05-01 | Gewerk Eisenhuette Westfalia | Scraper conveyors |
| SU604762A1 (en) * | 1974-07-19 | 1978-04-30 | Mironov Nikolaj T | Scraper conveyer intermediate section |
| CN202784591U (en) * | 2012-09-03 | 2013-03-13 | 溧阳市永立农牧机械有限公司 | Horizontal scraper machine |
| CN203111979U (en) * | 2013-03-22 | 2013-08-07 | 河北工程大学 | Middle trough of scraper conveyor |
| CN211109414U (en) * | 2019-11-06 | 2020-07-28 | 中煤张家口煤矿机械有限责任公司 | Scraper conveyor capable of guiding large-angle turning through arc contact of scraper and chute |
| CN212126505U (en) * | 2020-01-20 | 2020-12-11 | 江山永利百合实业有限公司 | Scraper chain with plastic part |
| CN112389953A (en) * | 2020-11-08 | 2021-02-23 | 冀凯河北机电科技有限公司 | Lifting baffle plate assembly for gangue backfill scraper conveyor |
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| CN113443346B (en) | 2023-03-14 |
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Effective date of registration: 20230504 Address after: 753001 the Ningxia Hui Autonomous Region Shizuishan city Dawukou District No. 1 metalworking road. Patentee after: NINGXIA TIANDI BENNIU INDUSTRIAL GROUP Co.,Ltd. Patentee after: NINGXIA TIANDI BENNIU CHAIN Co.,Ltd. Address before: 753001 the Ningxia Hui Autonomous Region Shizuishan city Dawukou District No. 1 metalworking road. Patentee before: NINGXIA TIANDI BENNIU INDUSTRIAL GROUP Co.,Ltd. Effective date of registration: 20230504 Address after: 753001 the Ningxia Hui Autonomous Region Shizuishan city Dawukou District No. 1 metalworking road. Patentee after: NINGXIA TIANDI BENNIU INDUSTRIAL GROUP Co.,Ltd. Address before: 753001 the Ningxia Hui Autonomous Region Shizuishan city Dawukou District No. 1 metalworking road. Patentee before: NINGXIA TIANDI BENNIU INDUSTRIAL GROUP Co.,Ltd. Patentee before: NINGXIA FIELD OF ACTIVITY HEAVY EQUIPMENT TECHNOLOGY Co.,Ltd. |
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