CN111846999A - Material conveying system capable of achieving automatic loading and unloading - Google Patents
Material conveying system capable of achieving automatic loading and unloading Download PDFInfo
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- CN111846999A CN111846999A CN202010809297.1A CN202010809297A CN111846999A CN 111846999 A CN111846999 A CN 111846999A CN 202010809297 A CN202010809297 A CN 202010809297A CN 111846999 A CN111846999 A CN 111846999A
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- 239000000463 material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000001960 triggered effect Effects 0.000 claims description 34
- 238000007789 sealing Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000000428 dust Substances 0.000 abstract description 13
- 230000036541 health Effects 0.000 abstract description 3
- 239000003814 drug Substances 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 239000002994 raw material Substances 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 3
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- 230000001360 synchronised effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
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- 238000004806 packaging method and process Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/44—Devices for emptying otherwise than from the top using reciprocating conveyors, e.g. jigging conveyors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention belongs to the field of automation equipment, and particularly relates to a material conveying system capable of automatically loading and unloading, which comprises a conveying hopper, a guide rail, a triggering device and a control system, wherein the conveying hopper moves between a loading position and an unloading position along the guide rail under the control of the control system, a self-closing structure is arranged in the conveying hopper, so that the conveying hopper is kept in a self-closing state in the transportation process, and the triggering device is arranged at the unloading position and used for breaking the self-closing state of the conveying hopper. Carry the self-closing structure in the hopper to ensure defeated material stability, the raise dust pollution of defeated material process that has significantly reduced simultaneously, control system has realized whole automatic feeding, transmission and has unloaded, has reduced manual operation procedure, has improved work efficiency greatly, has ensured staff occupational health.
Description
Technical Field
The invention belongs to the field of automation equipment, and particularly relates to a material conveying system capable of automatically loading and unloading.
Background
The production process of fireworks is various, the used medicines have the characteristics of inflammability and explosiveness, and are mostly in a powder state, such as carbon powder, high potassium, bright beads and rock powder, so that the fireworks have larger dust hazard and explosion risk.
With the rapid development of science and technology, the traditional manufacturing industry gradually develops towards intellectualization and automation, for example, a firework inner cylinder robot shown in patent publication No. CN106767195B, namely firework inner cylinder robot charging equipment and charging process, can realize the automatic production of firework inner cylinders, but the patent does not disclose how to fill raw materials at each metering and sub-packaging mechanism, and if the raw materials still need to be manually transported to fill the raw materials, the possibility of dust emission hazard and personnel health damage still exists.
Disclosure of Invention
In order to solve the problems existing in the prior art, the application provides a material conveying system capable of automatically loading and unloading, the self-closing state of a conveying hopper is realized through the design of the self-closing state of the conveying hopper in the conveying process, a trigger device matched with an unloading position breaks the self-closing state of the conveying hopper to realize automatic unloading, raw material supplement is carried out on each metering and subpackaging mechanism without manual re-matching, the danger of manual operation is reduced, the working efficiency of equipment is improved, and meanwhile, the dust pollution problem in the conveying process is greatly reduced.
It should be noted that: the application has wide application scenes, and the lack of automatic filling of the metering and subpackaging mechanism of the firework inner barrel robot in the background art is only exemplified and is not only used for the robot system.
The invention provides a material conveying system capable of automatically loading and unloading, which comprises a conveying hopper, a guide rail, a triggering device and a control system, wherein the conveying hopper moves between a loading position and an unloading position along the guide rail under the control of the control system, a self-closing structure is arranged in the conveying hopper, so that the conveying hopper is kept in a self-closing state in the transportation process, and the triggering device is arranged at the unloading position and used for breaking the self-closing state of the conveying hopper. Carry the self-closing structure in the hopper to ensure defeated material stability, the raise dust pollution of defeated material process that has significantly reduced simultaneously, control system has realized whole automatic feeding, transmission and has unloaded, has reduced manual operation procedure, has improved work efficiency greatly, has ensured staff occupational health.
Further, the self-closing structure comprises a closing valve arranged in the conveying hopper and a triggered device arranged outside the conveying hopper, and the closing valve is connected to the triggered device through a transmission mechanism and is changed between a closing position and an opening position under the control of the triggered device. The self-sealing structure has simple structural design and convenient operation.
Furthermore, the transmission mechanism is a fixed pulley block, a steel wire rope is arranged on the fixed pulley block, one inward end of the steel wire rope is connected with the closed valve, one outward end of the steel wire rope is connected with the triggered device, the dead weight of the closed valve is larger than that of the triggered device, and a clamping structure is arranged at the triggered device. A protective shell is arranged outside the fixed pulley block, and the radius of the triggered device is larger than the radial radius of the protective shell. The main power of the self-sealing structure comes from the clamping structure arranged at the triggered device end in a self-weight matching manner of the sealing valve to carry out clamping and fixing, so that the self-sealing state is more stable and is not easily influenced by power supply fluctuation or physical oscillation.
Furthermore, the screens structure is the terminal of the protecting crust that the fixed pulley group set up outward, is greater than the radial radius at protecting crust terminal by trigger device radius. When the triggered device ascends to the protective shell, the clamping is realized. The clamping structure is simple in structure and convenient to operate.
Furthermore, the protective shell wraps the fixed pulley block and the steel wire rope. The self-sealing structure can effectively prevent materials from entering the fixed pulley block, wearing the fixed pulley block and corroding the steel wire rope, and prolongs the service life of the self-sealing structure.
Furthermore, the discharge hole of the conveying hopper is a conical discharge hole, the closed valve is a conical valve, and the conical valve is just matched with the discharge hole. The discharge gate that will carry the hopper sets up to the toper structure and can make the ejection of compact more concentrated, and the raise dust still less, sets up the seal valve to the cone valve can produce downward pressure when sealing the discharge gate, makes the seal effect of seal valve better.
Furthermore, the control system comprises a controller, a first sensor arranged at the loading position and a second sensor arranged at the unloading position, and the controller is electrically connected with the first sensor, the second sensor and the triggering device respectively. The control system has simple structure and easy control, and the stability of the control signal is ensured by the electric connection mode.
Furthermore, the triggering device is an air cylinder, a push plate is arranged below the air cylinder, and a triggering area for the push plate to push is arranged on the triggered device. The cylinder has the advantages of simple structure and convenient operation as a trigger device.
Further, the side wall of the conveying hopper is provided with a feeding hole, and a baffle plate of the feeding hole is provided with a spring hinge. The feed inlet sets up at the lateral wall, and when loading the medicine, the raise dust is fallen to the transport hopper in again by the upper cover separation of carrying the hopper, can effectively prevent to load the raise dust pollution when medicine, and after loading the medicine, the automatic elasticity of spring hinge resets, guarantees to carry the seal of hopper.
Furthermore, a blanking port is arranged at the discharging position. The unloading of being convenient for guide better prevents that the unloading in-process from taking place the raise dust pollution.
As can be seen from the above description of the present invention, the auto-loading and unloading material conveying system of the present invention has the following advantages: 1. the conveying hopper moves between the discharging position and the charging position through the guide rail under the control of the control system, and the rapid material conveying can be realized. 2. The whole course of the conveying hopper in the conveying process is kept in a self-sealing state, so that the dust pollution in the conveying process is greatly reduced. 3. The trigger device pushes the closed valve to move downwards to drive the closed valve to ascend, the closed valve leaves the discharge hole to enable the conveying hopper to smoothly complete discharging, the trigger device resets after discharging is completed, the closed valve sags under the action of dead weight to drive the closed valve to be lifted by the trigger device, and the closed valve just fits with the discharge hole to complete sealing when the triggered device supports the protective shell. 4. The controller is matched with the first sensor and the second sensor on the guide rail to realize full-process automatic induction, automatic transmission and automatic loading and unloading, and the manual operation cost is greatly reduced.
Drawings
The drawings illustrate embodiments and together with the description serve to explain the principles of the invention. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of the external structure of a conveying hopper according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view illustrating a closed state of the conveying hopper from the closed structure according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view illustrating an opened state of the conveying hopper from the closed structure according to an embodiment of the present invention.
The reference numbers illustrate: 1-conveying hopper, 11-discharge port, 2-guide rail, 3-trigger device (cylinder), 31-push plate, 4-control system, 41-first sensor, 42-second sensor, 43-controller, 5-self-sealing structure, 51-sealing valve (cone valve), 52-triggered device, 53-transmission mechanism (fixed pulley block), 54-steel wire rope, 55-protective shell, 6-feed port, 61-spring hinge and 7-blanking port
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the invention provides a material conveying system capable of automatic loading and unloading, which comprises a conveying hopper 1, a guide rail 2, a triggering device 3 and a control system 4, wherein the conveying hopper 1 moves between a loading position and an unloading position along the guide rail 2 under the control of the control system 4, a self-closing structure 5 is arranged in the conveying hopper 1, so that the conveying hopper 1 is kept in a self-closing state in the transportation process, and the triggering device 3 is arranged at the unloading position and used for breaking the self-closing state of the conveying hopper 1. Normally, the unloading position corresponding to each automatic transportation of the same conveying hopper 1 is the same designated station, so that the rapidity and the accuracy of the transportation are ensured. The conveying path can be a straight line conveying or a curve conveying.
The control system 4 mainly includes a controller 43 and a terminal sensor, the terminal sensor is used for sensing the position information and the material bearing state of the conveying hopper and sending related signals to the controller 43 in time, and the controller 43 is used for processing the signals sent by the terminal sensor and performing corresponding action feedback on the signals.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As shown in fig. 1, on the basis of the above, the terminal sensor of the present embodiment employs a sensor, and the sensor has the characteristics of simple structure and quick response. The controller 43 is electrically connected to the first sensor 41, the second sensor 42, and the trigger device 3, respectively. The control system 4 has a simple structure, is easy to control, and ensures the stability of control signals in an electric connection mode.
The guide rail 2 can be a synchronous belt guide rail. The synchronous belt transmission has accurate transmission ratio, no slip, constant speed ratio, stable transmission, vibration absorption, low noise and wide transmission ratio range.
The triggering device 3 is an air cylinder, a push plate 31 is arranged below the air cylinder 3, and a triggering area for pushing the push plate 31 is arranged on the triggered device 52. When the cylinder 3 receives the action signal, the push plate 31 is pushed downwards, the push plate 31 pushes the triggering area on the triggered device 52, and therefore the triggered device 52 is pushed away from the clamping structure to achieve discharging. The cylinder is selected as the trigger device 3, so that the device has the advantages of simple structure and convenience in operation.
A blanking port 7 is arranged at the discharging position, a quantitative filling device can be arranged below the blanking port 7, and the inner barrel of the firework is quantitatively filled by the subsequent quantitative filling device.
As shown in FIG. 2, the side wall of the conveying hopper 1 is provided with a feeding port 6, and a baffle of the feeding port 6 is provided with a spring hinge 61. The feed inlet 6 sets up at the lateral wall, and when filling the medicine, the raise dust is fallen back again to conveying hopper 1 in by the upper cover separation of conveying hopper 1, can effectively prevent to fill the raise dust pollution when medicine, and after filling the medicine, spring hinge 61 closes, guarantees to convey hopper 1's seal.
The discharge hole 11 of the conveying hopper 1 is a conical discharge hole, the discharge hole 11 of the conveying hopper 1 is set to be of a conical structure, so that the discharge can be more concentrated, and the dust can be less.
As shown in fig. 3 and 4, the self-sealing structure 5 includes a sealing valve 51 disposed inside the conveying hopper 1 and an activated device 52 disposed outside the conveying hopper 1, and the sealing valve 51 is connected to the activated device 52 via a transmission mechanism 53 and is changed between a sealing position and an opening position under the control of the activated device 52.
As shown in fig. 3, in this embodiment, the transmission mechanism 53 is a fixed pulley block, a steel cable 54 is disposed on the fixed pulley block 53, an inward end of the steel cable 54 is connected to the closed valve 51, an outward end of the steel cable is connected to the triggered device 52, and a self weight of the closed valve 51 is greater than a self weight of the triggered device 52.
The clamping structure is arranged outside the crown block group 53, the clamping structure in the embodiment adopts a mode that the radius of the terminal of the protective shell 55 is smaller than the radius of the triggered device 52, when the closed valve 51 descends continuously due to self weight, under the action of the crown block group 53, the triggered device 52 ascends continuously, when the triggered device 52 contacts the protective shell 55, the radius of the triggered device 52 is larger than the radius of the terminal of the protective shell 55, so that clamping is realized, further descending of the closed valve 51 is prevented, at the moment, the closed valve 51 just seals the discharge hole 11 of the conveying hopper 1, and the self-closed state is realized.
A protective shell 55 is arranged to wrap the fixed pulley block 53 and the steel wire rope 54. The material can be effectively prevented from entering the fixed pulley block 53, wearing the fixed pulley block 53 and corroding the steel wire rope 54, and the service life of the self-sealing structure is prolonged.
The closing valve 51 is a conical valve, and the conical valve 51 is just matched with the conical discharge hole. The conical valve 51 can generate downward pressure when closing the discharge hole 11, so that the closing effect of the closing valve 51 is better.
With reference to fig. 1 to 4, the overall working process of the present invention is as follows:
carry hopper 1 to reach the position of feeding, first sensor 41 will target in place information send to controller 43, and controller 43 instructs the blanking storehouse of the position of feeding to fill conveying hopper 1, and the valve that the setting was stretched into at feed inlet 6 when the blanking storehouse entered into carries hopper 1 to pack, and after the packing, the blanking storehouse was taken out from, and spring hinge 61 on the valve of feed inlet 6 is automatic reply and is closed feed inlet 6 under the effect of resilience. In this process, the conveying hopper 1 is always kept in a self-closed state.
When the filling is completed, the first sensor 41 sends a completion message to the controller 43, and the controller 43 feeds back an action signal to the first sensor 41, so that the conveyance hopper 1 starts to convey along the guide rail 2.
When the conveying hopper 1 moves to the discharging position through the guide rail 2, the discharging opening 11 of the conveying hopper 1 is butted with the discharging opening 7 to form a discharging channel at the discharging position, and at the moment, the triggered device 52 is just below the triggering device 3. The second sensor 42 sends a position signal to the controller 43, the controller 43 feeds back an action signal to the trigger device 3, the trigger device 3 is opened, the trigger device 3 starts to move downwards to push the triggered device 52 away from the protective shell 55, the triggered device 52 pulls the closed valve 51 to ascend through the traction of the steel wire rope 54 and the action of the fixed pulley block 53, and the closed valve 51 leaves the discharge hole 11, so that the medicine in the conveying hopper 1 falls down along the blanking channel. (it should be noted that the discharge port 11 is connected with the blanking port 7 in a butt joint manner to form a blanking channel, which is a preferred embodiment of the present invention and is not a trigger condition of the in-place signal of the second sensor.)
After the medicine is unloaded, the second sensor 42 sends an unloading completion signal to the controller 43, the controller 43 feeds back an action signal to the trigger device 3 and the second sensor 42, the trigger device 3 is closed and reset, the acting force of the trigger device 3 is lost, the closed valve 51 continuously drops under the action of gravity because the dead weight of the closed valve 51 is greater than the dead weight of the triggered device 52, and when the triggered device 52 contacts the protective shell 55, the closed valve 51 just fits with the discharge hole 11 to form a closed state. Meanwhile, the conveying hopper 1 starts to convey back to the loading position through the guide rail 2, and the processes of automatic loading, automatic conveying and automatic unloading are completed at this time.
While the principles of the invention have been described in detail in connection with the preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing embodiments are merely illustrative of exemplary implementations of the invention and are not limiting of the scope of the invention. The details of the embodiments are not to be interpreted as limiting the scope of the invention, and any obvious changes, such as equivalent alterations, simple substitutions and the like, based on the technical solution of the invention, can be interpreted without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a material conveying system that ability auto-control handling which characterized in that: the self-sealing conveying hopper is characterized by comprising a conveying hopper, a guide rail, a triggering device and a control system, wherein the conveying hopper is controlled by the control system to move between a loading position and an unloading position along the guide rail, a self-sealing structure is arranged in the conveying hopper, so that the conveying hopper keeps a self-sealing state in the transportation process, and the triggering device is arranged at the unloading position and used for breaking the self-sealing state of the conveying hopper.
2. An auto-loadable material transfer system as recited in claim 1, wherein: the self-closing structure comprises a closing valve arranged in the conveying hopper and a triggered device arranged outside the conveying hopper, and the closing valve is connected to the triggered device through a transmission mechanism and is changed between a closing position and an opening position under the control of the triggered device.
3. An auto-loadable material transfer system as recited in claim 2, wherein: the transmission mechanism is a fixed pulley block, a steel wire rope is arranged on the fixed pulley block, one inward end of the steel wire rope is connected with the closed valve, one outward end of the steel wire rope is connected with the triggered device, the dead weight of the closed valve is larger than that of the triggered device, and a clamping structure is arranged at the end of the triggered device.
4. An auto-loadable material transfer system as recited in claim 3, wherein: the clamping structure is the terminal of the protective shell arranged outside the fixed pulley block, and the radius of the triggered device is larger than the radial radius of the terminal of the protective shell.
5. An auto-loadable material transfer system as recited in claim 4, wherein: the protective shell wraps the fixed pulley block and the steel wire rope.
6. An auto-loadable material transfer system as recited in claim 5, wherein: the discharge hole of the conveying hopper is a conical discharge hole, the closed valve is a conical valve, and the conical valve is just matched with the discharge hole.
7. An auto-loadable material transfer system according to any one of claims 1 to 6, wherein: the control system comprises a controller, a first sensor arranged at a charging position and a second sensor arranged at a discharging position, wherein the controller is electrically connected with the first sensor, the second sensor and the triggering device respectively.
8. An auto-loadable material transfer system as recited in claim 7, wherein: the trigger device is an air cylinder, a push plate is arranged below the air cylinder, and a trigger area for the push plate to push is arranged on the triggered device.
9. An auto-loadable material transfer system as recited in claim 8, wherein: the conveying hopper side wall is provided with a feeding hole, and a baffle of the feeding hole is provided with a spring hinge.
10. An auto-loadable material transfer system as recited in claim 9, wherein: and a blanking port is arranged at the discharging position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010809297.1A CN111846999A (en) | 2020-08-12 | 2020-08-12 | Material conveying system capable of achieving automatic loading and unloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010809297.1A CN111846999A (en) | 2020-08-12 | 2020-08-12 | Material conveying system capable of achieving automatic loading and unloading |
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| Publication Number | Publication Date |
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| CN111846999A true CN111846999A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010809297.1A Pending CN111846999A (en) | 2020-08-12 | 2020-08-12 | Material conveying system capable of achieving automatic loading and unloading |
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| Country | Link |
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| CN (1) | CN111846999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117918129A (en) * | 2024-03-25 | 2024-04-26 | 黑龙江省农业机械工程科学研究院绥化分院 | Corn threshing device |
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| CN201167491Y (en) * | 2008-03-25 | 2008-12-24 | 陈如法 | Novel barrel type granary |
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| CN203840918U (en) * | 2014-05-21 | 2014-09-24 | 牧原食品股份有限公司 | Unified precise discharging system for integrated hog house |
| CN206808368U (en) * | 2017-04-10 | 2017-12-29 | 天津市宁河原种猪场 | Feeding system of pigsty |
| CN206823710U (en) * | 2017-06-27 | 2018-01-02 | 史丹利化肥扶余有限公司 | A kind of corn controlled-release fertilizer production automatic recipe maker |
| CN209467034U (en) * | 2018-12-26 | 2019-10-08 | 青岛四洲重工设备有限公司 | A kind of anti-fugitive dust processing equipment of dumper |
| CN210735315U (en) * | 2019-09-30 | 2020-06-12 | 金雪驰科技（马鞍山）有限公司 | Urea conveying system for producing automobile exhaust treatment fluid |
| CN212334022U (en) * | 2020-08-12 | 2021-01-12 | 百特（福建）智能装备科技有限公司 | Material conveying system capable of achieving automatic loading and unloading |
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2020
- 2020-08-12 CN CN202010809297.1A patent/CN111846999A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201167491Y (en) * | 2008-03-25 | 2008-12-24 | 陈如法 | Novel barrel type granary |
| CN201799312U (en) * | 2010-05-20 | 2011-04-20 | 广州城市职业学院 | Peat soil disinfection crushing machine |
| CN203840918U (en) * | 2014-05-21 | 2014-09-24 | 牧原食品股份有限公司 | Unified precise discharging system for integrated hog house |
| CN206808368U (en) * | 2017-04-10 | 2017-12-29 | 天津市宁河原种猪场 | Feeding system of pigsty |
| CN206823710U (en) * | 2017-06-27 | 2018-01-02 | 史丹利化肥扶余有限公司 | A kind of corn controlled-release fertilizer production automatic recipe maker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117918129A (en) * | 2024-03-25 | 2024-04-26 | 黑龙江省农业机械工程科学研究院绥化分院 | Corn threshing device |
| CN117918129B (en) * | 2024-03-25 | 2024-05-31 | 黑龙江省农业机械工程科学研究院绥化分院 | Corn threshing device |
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