CN114435979A - Novel middle blanking side formula scraper blade reclaimer - Google Patents
Novel middle blanking side formula scraper blade reclaimer Download PDFInfo
- Publication number
- CN114435979A CN114435979A CN202210106302.1A CN202210106302A CN114435979A CN 114435979 A CN114435979 A CN 114435979A CN 202210106302 A CN202210106302 A CN 202210106302A CN 114435979 A CN114435979 A CN 114435979A
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- Prior art keywords
- reclaimer
- scraper
- support
- arm
- material taking
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- 230000007246 mechanism Effects 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 52
- 239000000725 suspension Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000003028 elevating effect Effects 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 230000001965 increasing effect Effects 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000109 continuous material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
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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
- B65G65/00—Loading or unloading
- B65G65/28—Piling or unpiling loose materials in bulk, e.g. coal, manure, timber, not otherwise provided for
-
- 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
- B65G37/00—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/08—Arrangements of sheaves
-
- 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
- B65G2201/042—Granular material
Abstract
The invention discloses a novel middle blanking side type scraper reclaimer, which comprises a travelling mechanism, a suspension arm support, a weight box, a track, a suspension arm lifting mechanism, a scraper reclaimer arm, an operation chamber and a workshop matched with the suspension arm lifting mechanism, wherein the scraper reclaimer arm comprises a machine head, a scraper, a chain, a reclaimer support, a machine tail and a guide chute; the motor is arranged at the tail of the reclaimer and is in transmission connection with the reclaimer bracket, and the track comprises a main track and an auxiliary track; the invention improves the stability of the equipment and can lighten the counter weight of the weight box; the reduced space size of the equipment is added to the stockpiling platform, so that the area of the stockpiling platform is increased, the stockpiling section of the materials is increased, and the purpose of increasing the storage capacity is achieved; the basic cost of the equipment is reduced, and the construction investment cost is reduced.
Description
Technical Field
The invention relates to a reclaimer, in particular to a novel middle blanking side type scraper reclaimer.
Background
The side scraper reclaimer is a kind of equipment used specially for continuous reclaiming of small granule material storage yard warehouse, its purpose is: the purpose of continuous material taking and conveying is achieved by matching the rubber belt conveyor in the material yard. The applicable field is a rectangular storage yard.
The structural style of the side type scraper reclaimer mainly comprises: the device comprises a traveling mechanism, a scraper plate material taking arm, a track, a cantilever lifting mechanism and the like.
The working principle is as follows: the materials are piled in the field in the form of a natural stacking angle, and the section of the materials is triangular. The side type scraper reclaimer is arranged on one side of the material storage yard and is provided with a scraper reclaimer arm which is arranged along the inclined plane of the material storage yard. When the scraper conveyor works, the chain on the scraper taking arm drives the scraper to rotate circularly on the cantilever support under the driving of the head chain wheel, and materials are scraped and conveyed to the guide chute at the tail part of the conveyor from the material pile under the action of the scraper and then fall onto the rubber belt conveyor, so that the purposes of taking materials and conveying are achieved.
The running mechanism of the side type scraper reclaimer moves back and forth by means of the track, and the scraper reclaimer arm can swing up and down along with the lifting of the inclined plane of the material pile.
The system arrangement form is as follows: the track of the side type scraper reclaimer is laid along one side of a storage yard, a rubber belt conveyor is arranged on the inner side of the track in parallel with the track, and the side type scraper reclaimer is used in combination with the rubber belt conveyor and is used for reclaiming materials from the material pile; the latter is responsible for the outward transport of the material.
The defects of the current side type scraper reclaimer model are as follows: the scraper blade reclaimer arm is installed on the side of the traveling mechanism, the main stress point of the traveling mechanism acts on the inner side leg, the scraper blade reclaimer is supported by a huge frame in order to ensure the stability of the scraper blade reclaimer, and meanwhile, the traveling mechanism is also provided with a weight box in order to ensure the balance of the scraper blade reclaimer arm. The disadvantages of this structure are that the equipment is bulky, the size of the occupied space is large, the equipment is heavy and the construction cost is high.
Therefore, a novel middle blanking side type scraper reclaimer which is more compact in equipment, saves equipment space, increases the storage area of a storage yard under the condition of the same storage yard space and increases the storage capacity of materials becomes a problem to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is that the scraper taking arm is arranged on the side surface of the travelling mechanism, the main stress point of the travelling mechanism acts on the inner side leg, the scraper taking machine is supported by a huge frame in order to ensure the stability of the scraper taking machine, and meanwhile, the travelling mechanism is also provided with a weight box in order to ensure the balance of the scraper taking arm. The disadvantages of this structure are that the equipment is bulky, the size of the occupied space is large, the equipment is heavy and the construction cost is high.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a novel middle blanking side type scraper reclaimer comprises a travelling mechanism, a suspension arm support, a weight box, a track, a suspension arm lifting mechanism, a scraper reclaimer arm, an operation chamber and a workshop matched with the suspension arm, wherein the scraper reclaimer arm comprises a machine head, a scraper, a chain, a reclaimer support, a machine tail and a guide chute; the tail of the machine is provided with a motor, the motor is in transmission connection with a reclaimer support, the track comprises a main rail and an auxiliary rail, the scraper plate reclaiming arm is arranged above the travelling mechanism, the weight box is arranged on the outer side surface of the auxiliary rail, and a rubber belt conveyor is further arranged below the travelling mechanism.
Furthermore, davit elevating system includes hoist engine, rope, first pulley, second pulley and connecting rod, first pulley sets up on the davit support, the second pulley sets up in connecting rod one end, the other end of connecting rod sets up in the reclaimer support outside, and with reclaimer support rotation connection, rope one end is connected with the hoist engine, and the other end twines on first pulley, second pulley, davit support, hoist engine all set up in the control chamber top.
Furthermore, the factory building is used for placing the stockpile, and a material blocking wall is arranged in the factory building.
Further, the weight box is used for stabilizing the balance scraper plate material taking arm.
Further, the track is used for supporting the travelling mechanism.
Furthermore, the suspension arm lifting mechanism is used for supporting the scraper plate material taking arm and the suspension arm lifting mechanism.
Further, the rubber belt conveyor is arranged between the main rail and the auxiliary rail.
Furthermore, running gear includes drag head, sprocket and drive mechanism, the sprocket carries out the transmission with drive mechanism and is connected, sprocket, drive mechanism set up in the head.
Compared with the prior art, the invention has the advantages that: the invention adopts a travelling mechanism, a suspension arm bracket, a weight box, a track, a suspension arm lifting mechanism, a scraper plate material taking arm, an operation chamber and a matching structure of a factory building matched with the travelling mechanism, and moves a fixed point of the scraper plate material taking arm, namely a blanking point, from the side wall of the travelling mechanism to the upper part of a platform of the travelling mechanism, and the improvement has the following three advantages: 1. because the fixed point of the scraper plate material taking arm is moved to the upper part of the traveling mechanism platform from the side wall, the stress gravity center of the equipment is changed, the lateral stress is changed into the plane stress, the stress is more uniform, the stability of the equipment is improved, and meanwhile, the counter weight of the weight box can be lightened; 2. the overall dimension of the equipment is reduced, the equipment is more compact, part of the machine frame is arranged below the cornice of the material platform, and due to the change of the blanking point of the reclaimer, the belt conveyor matched with the reclaimer is also moved between the two rails from the outer sides of the rails, the reduced space dimension of the equipment is increased to the stacking platform, the area of the material platform is increased, the material stacking section is increased, and the purpose of increasing the storage capacity is achieved; 3. in order to reduce the weight of the scraper plate material taking arm, a box-type structure of the material taking arm support is changed into a truss structure; the overall weight of the equipment is reduced, so that the basic cost of the equipment is reduced, and the construction investment cost is reduced; the invention has reasonable design and is worth popularizing.
Drawings
Fig. 1 is a schematic structural diagram of a novel intermediate blanking side type scraper reclaimer.
FIG. 2 is a right side view of the novel intermediate blanking side type scraper reclaimer of the present invention
As shown in the figure: 1. the device comprises a traveling mechanism, 2, a boom support, 3, a weight box, 4, a rail, 5, a boom lifting mechanism, 6, a scraper blade material taking arm, 7, an operation room, 8, a factory building, 9, a machine head, 10, a scraper blade, 11, a chain, 12, a material taking machine support, 13, a machine tail, 14, a material guide groove, 15, a motor, 16, a main rail, 17, a secondary rail, 18, a rubber belt conveyor, 19, a winch, 20, a rope, 21, a first pulley, 22, a second pulley, 23, a connecting rod, 24, a material blocking wall, 25, a rake head, 26, a chain wheel, 27 and a transmission mechanism.
Detailed Description
The following describes the novel intermediate blanking side type scraper reclaimer in further detail with reference to the accompanying drawings.
The present invention will be described in detail with reference to the accompanying fig. 1-2.
A novel middle blanking side type scraper reclaimer comprises a travelling mechanism 1, a suspension arm support 2, a weight box 3, a track 4, a suspension arm lifting mechanism 5, a scraper reclaimer arm 6, an operation chamber 7 and a factory building 8 matched with the suspension arm lifting mechanism, wherein the scraper reclaimer arm 6 comprises a machine head 9, a scraper 10, a chain 11, a reclaimer support 12, a machine tail 13 and a guide chute 14, the machine head 9 is arranged at the front part of the reclaimer support 12, the machine tail 13 is arranged at the rear part of the reclaimer support 12, the chain 11 is sleeved at the outer side of the reclaimer support 12, the scraper 10 is sleeved at the outer side of the chain 11, and the guide chute 14 is arranged below the machine tail 13; the tail 13 department is equipped with motor 15, motor 15 is connected with reclaimer support 12 transmission, track 4 includes main rail 16 and accessory rail 17, scraper blade reclaimer arm 6 sets up in running gear 1's top, weight box 3 sets up on the lateral surface of accessory rail 17, running gear 1 below still is equipped with rubber belt conveyor 18.
The boom lifting mechanism 5 comprises a winch 19, a rope 20, a first pulley 21, a second pulley 22 and a connecting rod 23, the first pulley 21 is arranged on the boom support 2, the second pulley 22 is arranged at one end of the connecting rod 23, the other end of the connecting rod 23 is arranged on the outer side of the reclaimer support 12 and is rotatably connected with the reclaimer support 12, one end of the rope 20 is connected with the winch 19, the other end of the rope is wound on the first pulley 21 and the second pulley 22, and the boom support 2 and the winch 19 are both arranged at the top of an operation chamber 24.
The factory building 8 is used for placing stockpiles, and a material blocking wall 25 is arranged in the factory building 8.
The weight box 3 is used for stabilizing the balance scraper taking arm 6.
The rail 4 is used for supporting the running gear 1.
The suspension arm lifting mechanism 5 is used for supporting the scraper plate material taking arm 6 and the suspension arm lifting mechanism 5. .
The belt conveyor 18 is disposed intermediate the primary rail 16 and the secondary rail 17.
The walking mechanism 1 comprises a drag head 25, a chain wheel 26 and a transmission mechanism 27, wherein the chain wheel 26 is in transmission connection with the transmission mechanism 27, and the chain wheel 26 and the transmission mechanism 27 are arranged on the handle head 25.
The invention discloses a novel middle blanking side type scraper reclaimer, which comprises the following specific implementation processes: firstly, a machine head 9 is arranged at the top of a reclaimer bracket 12, a machine tail 13 is arranged at the bottom of the reclaimer bracket 12, a motor is in transmission connection with the reclaimer bracket 12, a chain 11 is sleeved outside the reclaimer bracket 12, a scraper 10 is sleeved outside the chain 11, a travelling mechanism 1 is arranged above a main rail 16 and an auxiliary rail 17, a working chamber is arranged above the travelling mechanism 1, a weight box 3 is arranged outside the weight box 3 and the auxiliary rail 17, a rubber belt conveyor 18 is arranged below the travelling mechanism 1, a first pulley 21 is arranged on a boom bracket 2, a second pulley 22 is arranged at one end of a connecting rod 23, the other end of the connecting rod 23 is arranged outside the reclaimer bracket 12 and is in rotation connection with the reclaimer bracket 12, one end of a rope 20 is connected with a winch 19, the other end of the rope is wound on the first pulley 21 and the second pulley 22, and finally, the boom bracket 2, The winches 19 are all mounted on the top of the cab 7.
The invention adopts a travelling mechanism 1, a boom bracket 2, a weight box 3, a track 4, a boom lifting mechanism 5, a scraper plate material taking arm 6, an operation room 7 and a matching structure of a factory building 8 matched with the operation room, and moves a fixed point of the scraper plate material taking arm 6, namely a blanking point, from the side wall of the travelling mechanism 1 to the upper part of a platform of the travelling mechanism 1, and the improvement has the following three advantages: 1. because the fixed point of the scraper blade material taking arm 6 is moved to the upper part of the platform of the running gear 1 from the side wall, the stress gravity center of the equipment is changed, the lateral stress is changed into the plane stress, the stress is more uniform, the stability of the equipment is improved, and the counter weight of the weight box 2 can be lightened; 2. the overall dimension of the equipment is reduced, the equipment is more compact, part of the machine frame is arranged below the cornice of the material platform, and due to the change of the blanking point of the reclaimer, the matched rubber belt conveyor is also moved between the two rails from the outer sides of the rails, the reduced space dimension of the equipment is increased to the stacking platform, the area of the material platform is increased, the material stacking section is increased, and the purpose of increasing the storage capacity is achieved; 3. in order to reduce the weight of the scraper plate material taking arm 6, the material taking arm bracket is changed into a truss structure from a box structure; the overall weight of the equipment is reduced, so that the basic cost of the equipment is reduced, and the construction investment cost is reduced; the invention has reasonable design and is worth popularizing.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a novel middle blanking side formula scraper blade reclaimer, includes running gear (1), davit support (2), weight box (3), track (4), davit elevating system (5), scraper blade reclaimer arm (6), control chamber (7) and factory building (8) of looks adaptation with it, its characterized in that: the scraper blade material taking arm (6) comprises a machine head (9), a scraper blade (10), a chain (11), a material taking machine support (12), a machine tail (13) and a material guide groove (14), wherein the machine head (9) is arranged at the front part of the material taking machine support (12), the machine tail (13) is arranged at the rear part of the material taking machine support (12), the chain (11) is sleeved on the outer side of the material taking machine support (12), the scraper blade (10) is sleeved on the outer side of the chain (11), and the material guide groove (14) is arranged below the machine tail (13); the machine tail (13) is provided with a motor (15), the motor (15) is in transmission connection with a reclaimer support (12), the track (4) comprises a main rail (16) and an auxiliary rail (17), the scraper plate material taking arm (6) is arranged above the traveling mechanism (1), the weight box (3) is arranged on the outer side surface of the auxiliary rail (17), and a rubber belt conveyor (18) is further arranged below the traveling mechanism (1).
2. The novel intermediate blanking side type scraper reclaimer of claim 1, characterized in that: the suspension arm lifting mechanism (5) comprises a winch (19), a rope (20), a first pulley (21), a second pulley (22) and a connecting rod (23), the first pulley (21) is arranged on the suspension arm support (2), the second pulley (22) is arranged at one end of the connecting rod (23), the other end of the connecting rod (23) is arranged on the outer side of the reclaimer support (12) and is rotatably connected with the reclaimer support (12), one end of the rope (20) is connected with the winch (19), the other end of the rope is wound on the first pulley (21) and the second pulley (22), and the suspension arm support (2) and the winch (19) are arranged at the top of the operation chamber (7).
3. The novel intermediate blanking side type scraper reclaimer of claim 1, characterized in that: the plant (8) is used for placing stockpiles, and a material blocking wall (24) is arranged in the plant (8).
4. The novel intermediate blanking side type scraper reclaimer of claim 1, characterized in that: the weight box (3) is used for stabilizing the balance scraper plate material taking arm (6).
5. The novel intermediate blanking side type scraper reclaimer of claim 1, characterized in that: the rail (4) is used for supporting the travelling mechanism (1).
6. The novel intermediate blanking side type scraper reclaimer of claim 1, characterized in that: and the suspension arm lifting mechanism (5) is used for supporting the scraper plate material taking arm (6) and the suspension arm lifting mechanism (5).
7. The novel intermediate blanking side type scraper reclaimer of claim 1, characterized in that: the rubber belt conveyor (18) is arranged between the main rail (16) and the auxiliary rail (17).
8. The novel intermediate blanking side type scraper reclaimer of claim 1, characterized in that: the walking mechanism (1) comprises a drag head (25), a chain wheel (26) and a transmission mechanism (27), the chain wheel (26) is in transmission connection with the transmission mechanism (27), and the chain wheel (26) and the transmission mechanism (27) are arranged on the drag head (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210106302.1A CN114435979A (en) | 2022-01-28 | 2022-01-28 | Novel middle blanking side formula scraper blade reclaimer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210106302.1A CN114435979A (en) | 2022-01-28 | 2022-01-28 | Novel middle blanking side formula scraper blade reclaimer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114435979A true CN114435979A (en) | 2022-05-06 |
Family
ID=81371059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210106302.1A Pending CN114435979A (en) | 2022-01-28 | 2022-01-28 | Novel middle blanking side formula scraper blade reclaimer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114435979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114906629A (en) * | 2022-06-06 | 2022-08-16 | 中国中材国际工程股份有限公司 | Cantilever scraper chain structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1154717A (en) * | 1965-08-25 | 1969-06-11 | Beteiligungs & Patentverw Gmbh | Apparatus for Reclaiming Bulk Material from a Pile |
| US4121724A (en) * | 1976-01-17 | 1978-10-24 | Gustav Schade Maschinenfabrik | Apparatus for removing bulk material from a dump or stockpile |
| CN200951908Y (en) * | 2006-09-15 | 2007-09-26 | 丁叶林 | Hanging arm side type scraper carrying machine |
| CN101462646A (en) * | 2007-12-21 | 2009-06-24 | 沈阳矿山机械（集团）有限责任公司 | Rise side type scratch board reclaimer |
| CN203033464U (en) * | 2013-01-23 | 2013-07-03 | 中材建设有限公司 | Bridge-type side scrapper material taking machine and system |
| WO2016000723A1 (en) * | 2014-07-04 | 2016-01-07 | Flsmidth A/S | Bulk store |
| CN206813797U (en) * | 2017-05-12 | 2017-12-29 | 中冶赛迪上海工程技术有限公司 | A kind of totally-enclosed yard of elongated |
| CN107814127A (en) * | 2017-11-27 | 2018-03-20 | 中冶京诚工程技术有限公司 | A kind of closed storage warehouse |
| CN207759490U (en) * | 2017-11-27 | 2018-08-24 | 中冶京诚工程技术有限公司 | A kind of closed storage warehouse |
-
2022
- 2022-01-28 CN CN202210106302.1A patent/CN114435979A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1154717A (en) * | 1965-08-25 | 1969-06-11 | Beteiligungs & Patentverw Gmbh | Apparatus for Reclaiming Bulk Material from a Pile |
| US4121724A (en) * | 1976-01-17 | 1978-10-24 | Gustav Schade Maschinenfabrik | Apparatus for removing bulk material from a dump or stockpile |
| CN200951908Y (en) * | 2006-09-15 | 2007-09-26 | 丁叶林 | Hanging arm side type scraper carrying machine |
| CN101462646A (en) * | 2007-12-21 | 2009-06-24 | 沈阳矿山机械（集团）有限责任公司 | Rise side type scratch board reclaimer |
| CN203033464U (en) * | 2013-01-23 | 2013-07-03 | 中材建设有限公司 | Bridge-type side scrapper material taking machine and system |
| WO2016000723A1 (en) * | 2014-07-04 | 2016-01-07 | Flsmidth A/S | Bulk store |
| CN106660720A (en) * | 2014-07-04 | 2017-05-10 | Fl史密斯公司 | Bulk store |
| CN206813797U (en) * | 2017-05-12 | 2017-12-29 | 中冶赛迪上海工程技术有限公司 | A kind of totally-enclosed yard of elongated |
| CN107814127A (en) * | 2017-11-27 | 2018-03-20 | 中冶京诚工程技术有限公司 | A kind of closed storage warehouse |
| CN207759490U (en) * | 2017-11-27 | 2018-08-24 | 中冶京诚工程技术有限公司 | A kind of closed storage warehouse |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114906629A (en) * | 2022-06-06 | 2022-08-16 | 中国中材国际工程股份有限公司 | Cantilever scraper chain structure |
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