CN115072317A - Online maintenance device for guide rail chain of spiral tower - Google Patents
Online maintenance device for guide rail chain of spiral tower Download PDFInfo
- Publication number
- CN115072317A CN115072317A CN202210829105.2A CN202210829105A CN115072317A CN 115072317 A CN115072317 A CN 115072317A CN 202210829105 A CN202210829105 A CN 202210829105A CN 115072317 A CN115072317 A CN 115072317A
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- chain
- auxiliary gear
- maintenance device
- gear
- positioning shaft
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- 238000012423 maintenance Methods 0.000 title claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 32
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- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 6
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- 230000000694 effects Effects 0.000 abstract description 4
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- 239000004459 forage Substances 0.000 abstract description 3
- 238000011282 treatment Methods 0.000 abstract description 3
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- 239000003501 hydroponics Substances 0.000 description 4
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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
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/02—Lubricating devices
- B65G45/08—Lubricating devices for chains
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
- A01G31/02—Special apparatus therefor
- A01G31/04—Hydroponic culture on conveyors
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
- A01G31/02—Special apparatus therefor
- A01G31/04—Hydroponic culture on conveyors
- A01G31/042—Hydroponic culture on conveyors with containers travelling on a belt or the like, or conveyed by chains
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
- A01G31/02—Special apparatus therefor
- A01G31/04—Hydroponic culture on conveyors
- A01G31/047—Hydroponic culture on conveyors with containers inside rotating drums or rotating around a horizontal axis, e.g. carousels
-
- 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
- B65G35/00—Mechanical conveyors 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
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/10—Cleaning devices
- B65G45/18—Cleaning devices comprising brushes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses an online maintenance device for a guide rail chain of a spiral tower, and belongs to the technical field of pasture production equipment. The maintenance device includes: positioning the shaft; the transmission gear is arranged on the positioning shaft and rotates around the positioning shaft, and the transmission auxiliary gear is meshed with the chain to realize the steering of the chain; the first auxiliary gear is positioned below the transmission gear, arranged on the positioning shaft and rotates around the positioning shaft; a cleaning component is arranged on one side of the first auxiliary gear and wraps the chain passing through the cleaning component; and the shifting fork component is arranged on the tower body of the spiral tower and is opposite to the transmission gear. Utilize the condition that chain export and import are located the low level, collect the stage at the forage grass maturity, under the state of not shutting down, shift fork part stirs the chain to first auxiliary gear from drive gear on to utilize cleaning member to carry out cleaning treatment to the chain, clear effect is better, has ensured going on smoothly of production.
Description
Technical Field
The invention belongs to the technical field of pasture production equipment, and particularly relates to an online maintenance device for a guide rail chain of a spiral tower.
Background
At present, the high-quality feed in China has the problems of high cost, high dependence on foreign germplasm, land resource limitation on production and the like, so that the development of high-quality animal husbandry is hindered. Particularly, the problems of shortage of land resources, less suitable pasture planting areas, limitation of climate factors and the like exist in partial areas, so that huge gaps exist in high-quality feed stably provided all year round. Is one of the main challenges of developing high-quality animal husbandry with stable production all the year around in China.
Water culture pasture is used as a special cultivation mode for pasture cultivation, and the earliest use record can be traced to 1800 years. At the time, it was mainly used by european farm farmers to produce fresh germinating pasture from seeds and as feed for farm animals (cows being the main) in winter to maintain winter production activities (milk production) and to increase winter production. In recent years, in countries such as the middle east, africa and asia, the production of fresh feed cannot be sufficiently supplied to the needs of animal husbandry, especially to the supply of high-quality feed, due to the influence of population growth pressure, feed supply pressure and land resource pressure.
By hydroponics we can produce pasture grasses including maize, barley, oats, sorghum, rye, alfalfa and triticale. In conclusion, the water culture pasture can maintain a production mode of continuous production all the year around, high-quality fresh pasture production and high land resource utilization efficiency. The feed can support regional animal farms to complete self-sufficiency of partial high-quality feeds, and has higher practical significance and economic value. At present, the water planting forage grass needs to be firstly cleaned and disinfected and then germinate and grow seedlings, so the existing manual operation mode has low working efficiency and large labor intensity, and can not meet the requirement of large-scale production.
Through retrieval, chinese patent CN202110644632.1 discloses a plant hydroponics production system, which can be used for producing pasture grasses on a larger scale, and the main core of the plant hydroponics production system is a transportation component of a seedling tray or a planting tray, so chinese patent CN202210388823.0 discloses a seedling tray conveying system of a spiral tower, and belongs to the field of hydroponics devices. It comprises a track formed as a multi-layer helical structure tower defining a path; the trolley driving assembly comprises a chain guide rail, a chain and a chain driving mechanism; the chain guide rail is arranged on the inner side of the track and is consistent with the extending direction of the track; the chain is arranged in the chain guide rail; the chain driving mechanism is used for controlling the movement of the chain; the trolley is arranged on the track and comprises a connecting plate and a supporting plate; one side of the connecting plate is detachably connected with the chain, and the other side of the connecting plate is fixedly connected with the supporting plate.
However, during use, it has been found that in order to reduce the frictional resistance between the chain and the guide rail, a small amount of lubricating grease is generally applied to the chain periodically; meanwhile, the chain can be adhered with dust and the like in the operation process, and oil sludge (mixture of the dust and the grease) on the chain needs to be cleaned regularly, so that the chain can operate smoothly. The method commonly used at present is to stop the machine and then manually wipe the chain of the important section to keep the chain clean. On one hand, the working efficiency is lower; on the other hand, the height of the spiral tower body is about 7m, certain potential safety hazards exist in manual wiping, and dead angles of some chains cannot be wiped.
Disclosure of Invention
1. Problems to be solved
Aiming at the technical problem that the greasy filth on the surface of the chain is inconvenient to clean, the invention aims to provide the guide rail chain online maintenance device of the spiral tower, which is used for cleaning the greasy filth on the chain without stopping the spiral tower and ensuring the cleanness of the chain.
The invention also aims to provide the on-line maintenance device for the guide rail chain of the spiral tower, which is convenient for applying lubricating grease to the chain and ensures the smooth operation of the chain.
2. Technical scheme
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the invention discloses an online maintenance device for a guide rail chain of a spiral tower, which comprises:
positioning the shaft;
the transmission gear is arranged on the positioning shaft and rotates around the positioning shaft, and the transmission auxiliary gear is meshed with the chain to realize the steering of the chain;
the first auxiliary gear is positioned below the transmission gear, arranged on the positioning shaft and rotates around the positioning shaft; a cleaning component is arranged on one side of the first auxiliary gear, and the cleaning component wraps a chain passing through the cleaning component;
and the shifting fork component is arranged on the tower body of the spiral tower and is opposite to the transmission gear.
In one possible embodiment of the present invention, the first auxiliary gear has a mounting hole formed in a center thereof for engaging with the positioning shaft, tooth grooves formed on an outer circumferential edge thereof at equal intervals, and tooth edges having inclined planes formed between adjacent tooth grooves.
In one possible embodiment of the present invention, the inclined angle of the inclined plane is 1 to 1.5 °.
In one possible embodiment of the invention, the width of the tooth edge is 40-50mm, and the tooth edge is obtained by heat treatment.
In a possible embodiment of the present invention, the first auxiliary gear has a plurality of lightening holes.
In one possible embodiment of the present invention, the cleaning component includes a fixing base, and a cleaning brush and a cleaning flannel located inside the fixing base, and the fixing base is connected to the positioning shaft through a bracket.
In a possible implementation manner of the present invention, the oil injection device further includes a second auxiliary gear, the second auxiliary gear is disposed above the transmission gear, an oil injection part is disposed on one side above the second auxiliary gear, the oil injection part includes a cantilever, and an oil gun disposed at one end of the cantilever, and the oil gun is connected to the oil injection pipe.
In one possible embodiment of the present invention, the second auxiliary gear and the first auxiliary gear have the same structure.
And the shifting fork component is arranged on the tower body of the spiral tower and is opposite to the transmission gear.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the guide rail chain online maintenance device for the spiral tower, the condition that the chain outlet and the chain inlet are located at the low positions is utilized, in the forage grass mature and collection stage, the chain is shifted to the first auxiliary gear from the transmission gear by the shifting fork component under the non-stop state (the chain moves at the normal moving speed), so that the chain is cleaned by the cleaning component, the cleaning effect is good, the chain can be cleaned and maintained regularly, and the smooth production is guaranteed;
(2) according to the on-line maintenance device for the guide rail chain of the spiral tower, the chain is subjected to oil injection treatment, so that lubrication between the chain and the guide rail is smoother, and the friction resistance is reduced.
Drawings
FIG. 1 is a schematic view of the installation of the on-line maintenance device for the guide rail chain of the spiral tower of the present invention;
FIG. 2 is a schematic structural diagram of the device for maintaining the guide rail chain of the spiral tower on line according to the present invention;
FIG. 3 is an enlarged view of the section B of the track chain on-line maintenance device of the spiral tower of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
fig. 5 is a schematic structural view of a first auxiliary gear of the guide rail chain on-line maintenance device of the spiral tower of the invention.
Description of reference numerals:
11. positioning the shaft;
12. a transmission gear;
13. a first auxiliary gear; 131. mounting holes; 132. a tooth socket; 133. a bevel; 134. a tooth edge; 135. lightening holes;
14. a cleaning member; 141. a fixed seat; 142. a support;
15. a second auxiliary gear;
16. an oil injection component; 161. a cantilever; 162. an oil gun; 163. an oil filling pipe;
17. a fork member;
18. and a chain.
Detailed Description
Exemplary embodiments of the present invention are described in detail below. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that various changes to the invention may be made without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is presented for purposes of illustration only and not limitation to describe the features and characteristics of the invention, to set forth the best mode of carrying out the invention, and to sufficiently enable one skilled in the art to practice the invention. Accordingly, the scope of the invention is to be limited only by the following claims.
The following detailed description and example embodiments of the invention are set forth.
Example 1
As shown in fig. 1 to 5, the chain 18 of the double tower body is a closed loop structure, the chain 18 moves along the helix angle of the spiral tower, wherein the helix angle is 1 to 1.5 degrees, the pasture can obtain sufficient illumination and nutrition in the spiral tower through the spiral lifting, the growth time is designed to be seven days, and the like.
When the pasture is required to be harvested after being mature, the chain 18 led out from the tower body passes through the harvesting mechanism, so that the steering mechanisms of the chain 18 are arranged at the outlet and the inlet of the chain 18, and the guide rail chain 18 online maintenance device of the spiral tower is combined with the steering mechanism, so that the cleaning treatment of the chain 18 can be realized.
As shown in fig. 2 and 4, the device for online maintenance of the guide rail chain 18 of the spiral tower in the embodiment includes a tubular hollow steel positioning shaft 11, where the positioning shaft 11 is fixed to the tower body of the spiral tower, and specifically, a welding manner is adopted;
and the transmission gear 12 is arranged on the positioning shaft 11 and rotates around the positioning shaft 11, and the transmission auxiliary gear is meshed with the chain 18 to realize the steering of the chain 18. In the spiral tower, the chain 18 spirally rises at a certain spiral angle, the moving speed of the chain 18 is 0.5m/min, and the chain 18 is matched with the transmission gear 12;
the first auxiliary gear 13 is positioned below the transmission gear 12, is arranged on the positioning shaft 11 and rotates around the positioning shaft 11; a cleaning member 14 is provided at one side of the first auxiliary gear 13, and the cleaning member 14 wraps a chain 18 passing through the inside thereof;
the second auxiliary gear 15 is arranged above the transmission gear 12 in parallel, and an oil injection part 16 is arranged on one side above the second auxiliary gear 15;
and the shifting fork part 17 is arranged on the tower body of the spiral tower, and the shifting fork part 17 is opposite to the transmission gear 12.
Referring to fig. 2, the first auxiliary gear 13 is parallel to the transmission gear 12 and is vertically fixed on the positioning shaft 11, a distance between the first auxiliary gear 13 and the transmission gear 12 is 20-30mm, a mounting hole 131 is formed in the center of the first auxiliary gear 13, and the positioning shaft 11 is sleeved in the mounting hole 131 through a bearing. Preferably, circular arc-shaped tooth grooves 132 are formed at equal intervals on the outer circumferential edge of the first auxiliary gear 13, the circular arc-shaped tooth grooves 132 are matched with the rollers of the chain 18, and tooth edges 134 with inclined planes 133 are formed between adjacent tooth grooves 132.
Specifically, the inclination angle of the inclined plane 133 is 1 to 1.5 °, preferably 1.5 °, the direction shown by an arrow in fig. 5 is a rotation direction, wherein the lower side of the inclined plane 133 is located at the front end of the rotation direction, the chain 18 has stretching deflection at the turning position, and the deflection of the chain 18 can be offset by the design of the inclined plane 133, so that the chain 18 is not easily separated from the first auxiliary gear 13, and the transmission efficiency is improved. In addition, the installation between the first auxiliary gear 13 and the positioning shaft 11 is convenient and quick.
In order to enhance the overall load capacity of the first auxiliary gear 13 and reduce the self weight of the first auxiliary gear 13, a plurality of lightening holes 135 are formed in the first auxiliary gear 13, the first auxiliary gear 13 is made of metal, such as alloy steel like stainless steel and bearing steel, and has the advantages of strong load capacity, good wear resistance, light overall weight, small inertia, and good flexibility in starting, stopping and reversing.
In order to further reduce the possibility that the first auxiliary gear 13 will fall off the chain 18, the tooth width of the first auxiliary gear 13 is W, 2mm W5 mm. In this embodiment, the tooth width of the first auxiliary gear 13 is 3mm, the tooth width of the first auxiliary gear 13 is narrow, the chain 18 may vibrate under complicated conditions, and the narrow tooth width is beneficial to reducing the possibility of dislocation and disengagement between the first auxiliary gear 13 and the chain 18.
In some embodiments of the present invention, the width of the tooth edge 134 is 40-50mm, and in order to improve the performance of the tooth edge 134, the tooth edge 134 may be obtained by heat treatment, such as laser treatment of the tooth edge 134, first raising the temperature to 580 ± 10 ℃, keeping the temperature for 150 ± 5 minutes, and air cooling, and the obtained tooth edge 134 has better impact resistance.
In fig. 3 and 4, it can be seen that the cleaning member 14 includes a fixed seat 141, and a cleaning brush (not labeled) and a cleaning flannel (not labeled) located inside the fixed seat 141, and the fixed seat 141 is connected to the positioning shaft 11 through a bracket 142. Chain 18 passes the space at fixing base 141 place, and the cleaning brush that the space was equipped with is from parts such as horizontal direction clearance running roller, and clean cotton flannel is from vertical direction clearance outer link plate and inner link plate etc. and use the discovery through the practice, and the processing of chain 18 is comparatively clean to prepare for subsequent oiling.
In this embodiment, it is preferable that the distance between the second auxiliary gear 15 and the transmission gear 12 is 20-30mm, the oil injection part 16 includes a cantilever 161, and an oil gun 162(NSK grease squirt gun) disposed at one end of the cantilever 161, the oil gun 162 is connected to the oil injection pipe 163, and the oil gun 162 is supplied with lubricating grease from the oil injection pipe 163, and considering that the position of the outlet chain 18 is low, manual oil injection may be performed, and automatic oil injection may also be performed by using an automatically controlled structural design. The cantilever 161 is sleeved on the positioning shaft 11, can rotate around the positioning shaft 11 at a small angle, and is fixed by transverse positioning of bolts.
Further, the transmission gear 12, the second auxiliary gear 15 and the first auxiliary gear 13 have the same structure, and considering that the moving speed of the chain 18 of the present invention is relatively slow, the fork member 17 may be designed in the prior art, such as a bicycle speed-changing fork structure.
When the cleaning device is used, the shifting fork part 17 is manually operated at the outlet position of the chain 18, so that the chain 18 falls to the first auxiliary gear 13 from the transmission gear 12, the support 142 of the cleaning part 14 can be driven by hydraulic expansion and contraction, the fixing seat 141 moves forwards and wraps the chain 18, and the cleaning brush and the cleaning flannelette in the fixing seat 141 clean the chain 18 on the premise of continuous movement. After the cleaning of the strand of chain 18 is completed, the fork member 17 is manually operated at the position of the entry opening, so that the chain 18 is lifted from the transmission gear 12 to the second auxiliary gear 15, and the oiling (generally with grease) of the previously cleaned chain 18 is started by the oiling member 16.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the technical principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (8)
1. An online maintenance device for a guide rail chain of a spiral tower comprises:
a positioning shaft (11);
the transmission gear (12) is arranged on the positioning shaft (11) and rotates around the positioning shaft (11), and the transmission auxiliary gear is meshed with the chain (18) to realize the steering of the chain (18);
the gear positioning mechanism is characterized by further comprising a first auxiliary gear (13), wherein the first auxiliary gear (13) is located below the transmission gear (12), arranged on the positioning shaft (11) and rotates around the positioning shaft (11); a cleaning component (14) is arranged on one side of the first auxiliary gear (13), and the cleaning component (14) wraps a chain (18) passing through the interior of the cleaning component;
and the shifting fork component (17) is arranged on the tower body of the spiral tower, and is opposite to the transmission gear (12).
2. The on-line maintenance device for the guide rail chain of the spiral tower as claimed in claim 1, wherein the first auxiliary gear (13) is centrally provided with a mounting hole (131) to be engaged with the positioning shaft (11), the outer circumferential edge thereof is provided with tooth grooves (132) at equal intervals, and tooth edges (134) with inclined planes (133) are formed between adjacent tooth grooves (132).
3. The on-line maintenance device of guide rail chains of spiral towers according to claim 2, characterized in that the inclination angle of the inclined plane (133) is 1-1.5 °.
4. The spiral tower track chain in-line maintenance device of claim 3, wherein the width of the tooth edge (134) is 40-50 mm.
5. The on-line maintenance device for the guide rail chain of the spiral tower as claimed in claim 4, wherein the first auxiliary gear (13) is provided with a plurality of lightening holes (135).
6. A spiral tower track chain on-line maintenance device according to any one of claims 1-5, characterized in that the cleaning member (14) comprises a holder (141) and a cleaning brush and cleaning fleece inside the holder (141), the holder (141) being connected to the positioning shaft (11) by a bracket (142).
7. The on-line maintenance device for the guide rail chain of the spiral tower as claimed in claim 6, further comprising a second auxiliary gear (15), wherein the second auxiliary gear (15) is disposed above the transmission gear (12), an oil injection part (16) is disposed on one side above the second auxiliary gear (15), the oil injection part (16) comprises a cantilever (161), and an oil gun (162) disposed at one end of the cantilever (161), and the oil gun (162) is connected to the oil injection pipe (163).
8. The on-line maintenance device for a track chain of a spiral tower of claim 7, wherein the second auxiliary gear (15) has the same structure as the first auxiliary gear (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210829105.2A CN115072317A (en) | 2022-07-15 | 2022-07-15 | Online maintenance device for guide rail chain of spiral tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210829105.2A CN115072317A (en) | 2022-07-15 | 2022-07-15 | Online maintenance device for guide rail chain of spiral tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115072317A true CN115072317A (en) | 2022-09-20 |
Family
ID=83259695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210829105.2A Pending CN115072317A (en) | 2022-07-15 | 2022-07-15 | Online maintenance device for guide rail chain of spiral tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115072317A (en) |
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| CN215172142U (en) * | 2021-05-17 | 2021-12-14 | 泉州宏鼎工程机械有限公司 | Automatic timing oiling device for chain |
| CN114620396A (en) * | 2022-04-14 | 2022-06-14 | 北京金晟达生物电子科技有限公司 | Spiral tower educate seedling tray conveying system |
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2022
- 2022-07-15 CN CN202210829105.2A patent/CN115072317A/en active Pending
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|---|---|---|---|---|
| US20110065541A1 (en) * | 2009-09-11 | 2011-03-17 | Sen-Piao Lai | Sprocket assembly |
| CN212333820U (en) * | 2020-04-26 | 2021-01-12 | 球明汽车零部件（天津）有限公司 | Refueling device for cleaning line conveying chain |
| CN212531205U (en) * | 2020-06-15 | 2021-02-12 | 宝鸡圭彬光电设备有限公司 | Fixed wire feeder chain cleaning and lubricating device |
| CN113148310A (en) * | 2021-04-25 | 2021-07-23 | 扬州市伟东传送设备有限公司 | Transmission chain and tower screw conveyer |
| CN215172142U (en) * | 2021-05-17 | 2021-12-14 | 泉州宏鼎工程机械有限公司 | Automatic timing oiling device for chain |
| CN214988337U (en) * | 2021-06-25 | 2021-12-03 | 南京欧瑞机械锻造有限公司 | Conveying chain for cement production |
| CN114620396A (en) * | 2022-04-14 | 2022-06-14 | 北京金晟达生物电子科技有限公司 | Spiral tower educate seedling tray conveying system |
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