CN101832090B - Warehouse and automatic ventilation control system thereof - Google Patents
Warehouse and automatic ventilation control system thereof Download PDFInfo
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- CN101832090B CN101832090B CN2010101615448A CN201010161544A CN101832090B CN 101832090 B CN101832090 B CN 101832090B CN 2010101615448 A CN2010101615448 A CN 2010101615448A CN 201010161544 A CN201010161544 A CN 201010161544A CN 101832090 B CN101832090 B CN 101832090B
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Abstract
本发明公开了一种仓库自动通风控制系统及仓库，包括窗框架，窗框架上设有风扇套件和窗门，窗门的上缘与窗框架之间通过合页铰接，窗框架与窗门之间设有气缸，窗门上沿纵向设有导向滑轨，导向滑轨内设有滑块，气缸的缸体固定在窗框架上，气缸的活塞杆与所述滑块铰接；还包括PLC控制器，用于控制气缸和风扇套件的运行。结构简单、使用方便，可以通过自动控制的排风扇、气缸等设备的运行，保证仓库环境良好，便于粮食、弹药等物质的储存。每个库房的自动通风控制系统可以由一台PLC控制器控制，PLC控制器可以与整个仓库的控制计算机连接，并与互联网连接，实现远程控制和信号传输。
The invention discloses an automatic ventilation control system for a warehouse and a warehouse, comprising a window frame, on which a fan kit and a window door are arranged, the upper edge of the window door and the window frame are hinged through a hinge, and the window frame and the window frame are hinged. There is a cylinder between them, and a guide slide rail is arranged longitudinally on the window door, and a slider is arranged inside the guide slide rail. The cylinder body of the cylinder is fixed on the window frame, and the piston rod of the cylinder is hinged to the slide block; it also includes PLC to control the operation of the air cylinder and fan kit. The structure is simple and easy to use. It can ensure a good warehouse environment through the operation of automatically controlled exhaust fans, cylinders and other equipment, and is convenient for the storage of food, ammunition and other materials. The automatic ventilation control system of each warehouse can be controlled by a PLC controller, and the PLC controller can be connected with the control computer of the whole warehouse and connected with the Internet to realize remote control and signal transmission.
Description
Technical field
The present invention relates to a kind of ventilation installation, relate in particular to a kind of warehouse automatic ventilation control system and warehouse.
Background technology
Ventilation installation is the indispensable device in warehouse.
Warehouse of the prior art ventilation installation, complex structure, use inconvenience can not realize automatic control.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structurely, easy to use, can realize the warehouse automatic ventilation control system and the warehouse of automatically control.
The objective of the invention is to be achieved through the following technical solutions:
Warehouse of the present invention automatic ventilation control system, comprise window frame, described window frame is provided with fan external member and window, hinged between the upper limb of described window and the window frame by hinge, be provided with cylinder between described window frame and the window, longitudinally be provided with directive slide track on the described window, be provided with slide block in the described directive slide track, the cylinder body of described cylinder is fixed on the described window frame, and the piston rod of described cylinder and described slide block are hinged;
Also comprise the PLC controller, be used to control the operation of described cylinder and fan external member.
Warehouse of the present invention, this warehouse are provided with above-mentioned warehouse automatic ventilation control system.
As seen from the above technical solution provided by the invention, warehouse of the present invention automatic ventilation control system and warehouse, because window frame is provided with fan external member and window, hinged between the upper limb of window and the window frame by hinge, be provided with cylinder between window frame and the window, longitudinally be provided with directive slide track on the window, be provided with slide block in the directive slide track, the cylinder body of cylinder is fixed on the window frame, and the piston rod of cylinder and described slide block are hinged; Also comprise the PLC controller, be used for the operation of control cylinder and fan external member.Simple in structure, easy to use, can guarantee that warehouse environment is good by the operation of equipment such as the automatic exhaust fan of controlling, cylinder, be convenient to the storage of materials such as grain, medicine and ammunition.
Description of drawings
Fig. 1 is the structural representation of warehouse of the present invention automatic ventilation control system;
Fig. 2 is that the A-A of Fig. 1 is to sectional view;
Fig. 3 is the B portion enlarged drawing of Fig. 2;
Fig. 4 is the structural representation of directive slide track among the present invention;
Fig. 5 is that the C-C of Fig. 4 is to sectional view;
Fig. 6 is pneumatic control schematic diagram among the present invention;
Fig. 7 is the perspective view of warehouse of the present invention automatic ventilation control system;
Fig. 8 is the transmission principle figure of data flow in the specific embodiments of the invention.
The specific embodiment
Warehouse of the present invention automatic ventilation control system, its preferable specific embodiment is:
Comprise window frame, described window frame is provided with fan external member and window, hinged between the upper limb of described window and the window frame by hinge, be provided with cylinder between described window frame and the window, longitudinally be provided with directive slide track on the described window, be provided with slide block in the described directive slide track, the cylinder body of described cylinder is fixed on the described window frame, and the piston rod of described cylinder and described slide block are hinged;
Also comprise the PLC controller, be used to control the operation of described cylinder and fan external member.The edge of described window can be provided with the window reinforcing rib, and the below of described cylinder is fixed with camera.The cylinder body of described cylinder can be fixed by cylinder stay bolt and cylinder support, and described cylinder support is fixed on the described window frame by the set bolt group.
The piston rod of described cylinder can link to each other with the hinge contiguous block by branch sleeve, and described hinge contiguous block and described slide block are hinged by bearing pin.
The opening angle of described window can be less than or equal to 70 °, and the outside of window can be provided with dust collecting sleeve, and after described window was opened, opening was used to collect the dust of discharge over against described dust collecting sleeve.
Described directive slide track can be provided with T type groove, the T type piece of described slide block for matching with described T type groove.
Described slide block inside can be provided with cavity, the both sides of described cavity are respectively equipped with the hole, and steel ball is put at the position of the two side holes in described cavity respectively, be provided with spring between two steel balls, the diameter in described hole is less than or equal to half of diameter of described steel ball, and the exposed portions serve of described steel ball withstands on the inwall of described directive slide track both sides.Because spring can stretch, and is flexible constraint (in the horizontal direction) between slide block and the slide rail.
Warehouse of the present invention, its preferable specific embodiment are that this warehouse is provided with above-mentioned warehouse automatic ventilation control system.Can guarantee that warehouse environment is good by the operation of equipment such as the automatic exhaust fan of controlling, cylinder, be convenient to the storage of grain, medicine and ammunition.
Also in conjunction with the accompanying drawings the present invention is described in detail below by specific embodiment:
As Fig. 1-5, shown in Figure 7, comprise window frame 1, fan external member 2, directive slide track 3, cylinder stay bolt 4, camera 5, window 6, hinge 7, window reinforcing rib 8, gas piston rod 9, cylinder support 10, set bolt group 11, cylinder 12, set bolt 13, slide block 14, spring 15, steel ball 16, stopper 17, hinge contiguous block 18, branch sleeve 19, bearing pin 20 etc.
Each structural use and basic functional principle are:
Window frame 1 can change size according to user's demand.Fan external member 2 is the major parts of ventilating, and is used for the purpose that extracting air realizes reducing the warehouse humiture.Cylinder 12 is fixing with cylinder support 10 by cylinder stay bolt 4, and cylinder support 10 is fixed on the window frame 1 by set bolt group 11.Window 6 is connected with window frame 1 by the hinge 7 of upside, it can be put the beams in place around window frame 1 open.In order to strengthen window 6 intensity, prevent distortion, ad hoc meter connects a circle window reinforcing rib 8 (angle steel) in its four side weld.When needs ventilated, control system started, and makes cylinder 12 pressurisings, and gas piston rod 9 stretches out.Gas piston rod 9 links to each other with hinge contiguous block 18 by branch sleeve 19, and connected mode is for being threaded.Hinge contiguous block 18 forms hinge with slide block 14 by bearing pin 20 and is connected.
The principle of its action is: branch sleeve 19 two ends are connecting cylinder piston rod 9 and hinge contiguous block 18 respectively, hinge contiguous block 18 1 ends are screw thread, one end is a pan, hinge contiguous block 18 connects by bearing pin 20 with slide block 14, hinge contiguous block 18, bearing pin 20 and linkage of slide block 14 common compositions, 20 fixations of bearing pin are inserted in the pan of hinge contiguous block 18 and slide block 14 ends, when gas piston rod 9 stretches out, slide block 14 slides in directive slide track 3, thereby window 6 is opened.
Window 6 stops after opening 70 °, and fan external member 2 starts and begins to ventilate.Consider that it is radial location that slide block 14 slides in directive slide track 3, ad hoc two holes in slide block 14 both sides, respectively put into two steel balls 16 in the hole, steel ball 16 is squeezed in the hole respectively by the spring between them 15, the aperture is less than half of steel ball 16 diameters, exposed portions serve withstands on the directive slide track 3 both sides inwalls, guarantees the relative position of slide block 14 in directive slide track 3.Steel ball 16 and spring 15 are put into slide block 14 trams from the installing hole at slide block 14 rears, thereby block the installation that installing hole is finished steel ball 16 and spring 15 with stopper 17 then.
Because spring can stretch, and is flexible constraint (in the horizontal direction) between slide block and the slide rail, allowing in the horizontal direction, top shoe has certain amount of movement.Produce the phenomenon of interfering and having a contest in the time of can avoiding sliding like this between slide block and the slide rail, the frictional resistance when also having reduced simultaneously to slide guarantees slide block 14 smooth sliding.(, can not guarantee slide block and slide rail definitely in a plane, the phenomenon that is easy to generate interference during slip between slide block and the slide rail and has a contest) because there are certain alignment error when mounted inevitably in slide rail and cylinder
With ventilating when finishing, fan external member 2 quits work, and the commutation of cylinder reversal valve is reclaimed gas piston rod 9, thereby drive slide block 14 window is closed, and finishes this ventilation task.
As shown in Figure 6, the warehouse can be provided with a plurality of described warehouses automatic ventilation control system, the cylinder 12 of a plurality of warehouses automatic ventilation control system is driven by a cover pneumatic system, pneumatic system comprises 3 position-5 way solenoid operated directional valve 21, when work in 3 position-5 way solenoid operated directional valve 21 right positions, the piston rod of cylinder 12 stretches out, when the work of position, 3 position-5 way solenoid operated directional valve 21 left side, the piston rod of cylinder 12 is regained, when 3 position-5 way solenoid operated directional valve 21 was in meta, cylinder 12 disconnected with the gas circuit of pneumatic system;
The warehouse can be provided with temperature and humidity sensor and camera, and the window of warehouse automatic ventilation control system can be provided with the open and close stopping means;
A warehouse automatic ventilation control system can be by a PLC controller control, and the PLC controller can be connected with the control computer, and described computer links to each other with the internet, realizes the transmission of Long-distance Control and signal.
Whether the temperature humidity of each storehouse and window situation such as open can be transferred to computer by PLC, is monitored the situation of each storehouse at any time by computer.The operator can finish actions such as the window switch of each storehouse and exhaust fan rotating by the control computer.Ventilate according to each storehouse situation;
Control computer and internet link, and whether the temperature humidity of each storehouse and window situation such as open can be issued the warehouse superior unit in real time by the internet, is monitored in real time or Long-distance Control by superior unit.Can guarantee so important warehouses such as grain depot ammunition depot and drug storage be perfectly safe and controlled.
Described warehouse is provided with the temperature and humidity sensor, and the window of described warehouse automatic ventilation control system is provided with out stopping means and closes stopping means, describedly drives stopping means and closes stopping means near switch or touch switch or optoelectronic switch;
The automatic ventilation control system of described each storehouse is controlled by a PLC controller, and described PLC controller is connected with the control computer, and described control computer links to each other with the internet;
Whether window opens ventilation can be controlled by computer.Also can be arranged to the mode (according to the temperature and humidity situation of each storehouse) of unlatching automatically, operating principle is as follows: the temperature and humidity sensor inputs to the PLC controller with the temperature and humidity signal, after temperature and humidity reaches preset threshold, the PLC controller sends control signal, make the right position work of 3 position-5 way solenoid operated directional valve, cylinder piston rod stretches out, window is progressively opened, when window is opened to 70 when spending, drive stopping means and signal to the PLC controller, PLC controller control fan external member starts ventilates, after the time that is vented to setting, PLC controller control 3 position-5 way solenoid operated directional valve commutates to the work of position, a left side, and the cylinder piston rod withdrawal is progressively closed window, when window is closed fully, close stopping means and signal to the PLC controller, PLC controller control 3 position-5 way solenoid operated directional valve is in meta, the cylinder piston rod stop motion.
Described camera is fixed on the cylinder below of described warehouse automatic ventilation control system, each window real time video signals is filmed, the control computer in input warehouse, and import the real time video signals of each window into internet, superior unit is monitored the real-time condition in each warehouse in real time by the internet.
The beneficial effect that the present invention can obtain is:
After window is opened, with the angle of vertical plane be 70 ° (can adjust), rainwater wafts into the warehouse from the top in the time of can preventing to ventilate effectively, and during exhaust fan work, window can stop that the dust of discharge descends slowly and lightly downwards, preventing that dust from waving all round influences surrounding environment, is specially adapted to the bigger warehouse of dust.The angle of opening 70 ° is not any selection, but this angle best results;
After window is closed,, better safety is arranged because cylinder control system and window self design can't be opened window from the outside;
Simple in structure, in light weight, volume is little, low energy consumption, be convenient to installation and maintenance, has the very high ratio of performance to price.
Among the present invention, a plurality of storehouses can only drive the switch of a plurality of windows with an air pump, and the switch of window is by air cylinder driven, have avoided each window that the complexity of switching mechanisms such as a motor and gear reduction box or the inconvenience of hand switch all are housed.Because window higher (windows such as drug storage are high at 3 ~ 6 meters for general medium-sized grain depot, medium-and-large-sized ammunition depot), so easy for installation, it is also convenient to use.And cost is low, because the storehouse in medium-and-large-sized warehouse is more, each storehouse has a plurality of windows again, so can save great amount of cost.
Can come the forward-reverse that the control cylinder solenoid operated directional valve just can control cylinder with PLC, and then open, close window, reduction box has been saved in the centre, complex parts such as tooth bar, and control is convenient.
The air draft window of traditional venetian blind type is because the gap is big, and blow-by is easy to make rainwater to flow into window, enters storehouse.This is that important storehouses such as grain depot, ammunition depot drug storage are unallowed.Among the present invention, the window outside is a block plate, seals when closing.Because window is about direction switch, rather than the left and right directions switch, so even, the effect of keeping off the rain is arranged also in the rainy day ventilation of windowing.In the time of can preventing to ventilate in the rain, rainwater enters storehouse.
Traditional venetian blind type ventilation window is dangerous, is easy to destroyed bad person of causing or animal and slips into.Ectomesoderm steel plate of the present invention is connecting the cylinder of the inside, can't open window from the outside, and antitheft function is arranged.
Because outward-dipping unlatching in the window, ventilate when being opened to the 70 degree left and right sides, so the dust in the warehouse is (as the dust of grain depot, the dust of flour mill etc.) window of running into inclination can descend slowly and lightly downwards, fall under the foot of a wall in warehouse, rather than level flies away away, can waft to far place if level is blown out, and influences the warehouse surrounding environment.The dust collecting sleeve in the window outside among the present invention has the function of dustproof filter dirt.At medium-and-large-sized grain depot, drug storage in the ammunition depot, generally has a plurality of storehouses, and the window more than four is arranged in each storehouse, and in native system, whole warehouse is provided with an air pump, can drive a plurality of cylinders, the switch of a window of each air cylinder driven.It also is the switch that an air pump can drive a plurality of windows; Do not need each window all to adorn a drive motors.So not only saved cost but also alleviated the weight of structure, and made the structure of ventilation system the simplest, cost is minimum, and it is the most convenient to install.Because gas circuit can be grown the transmission of distance, thus air pump to drive the scheme of a plurality of window switches of a plurality of storehouses feasible.
A big bag can be adorned in the outside of each window, and its material is an ethene, and braidings such as terylene form.Sack can will be caught by dust in air.When window was opened the outside air draft of exhaust fan, the dust in the warehouse can be blocked, and drops in the sack.It is far away so just can to prevent effectively that dust from flying out, and pollutes the warehouse surrounding environment.
Each storehouse is equipped with a programmable logic controller PLC, and it can control the electromagnet of air-powered electromagnetic reversal valve, and reversal valve control cylinder, and then the advancing and retreat of control cylinder also just can be controlled the opening and closing of window.Open down assigned position (as 70 degree) when window, touch a limit switch, this switch sends a switching signal and gives PLC.PLC controls solenoid operated directional valve, and reversal valve is in meta, and cylinder halts, and the window opening process finishes, and PLC control electrical machinery of ventilator just changes then, makes the outside air draft of electric fan, and the counter-rotating of PLC control electrical machinery of ventilator makes the inside exhausting of fan.Ventilate after the end, PLC control electromagnet reversal valve commutates, and cylinder retreats, and window is closed the back fully and touched a limit switch, and the switching signal in this switch place of sending out acts on PLC, and PLC controls solenoid operated directional valve, makes reversal valve be in meta, and cylinder stops.
As shown in Figure 8, quantitative temperature pick up and humidity sensor are installed in each warehouse, the programmable logic controller in these sensors and each warehouse (PLC) links, and the temperature humidity signal that records passes among the PLC.Whole warehouse is provided with the computer of a control, and the PLC of each storehouse and the computer of control link.Whether the temperature humidity of each storehouse and window situation such as open can be transferred to computer by PLC, is monitored the situation of each storehouse at any time by computer.The operator can finish actions such as the window switch of each storehouse and exhaust fan rotating by the control computer.Ventilate according to each storehouse situation.Information such as the temperature of each storehouse of warehouse, humidity and each window switching ventilation are imported the internet into, and each storehouse temperature, humidity and each window that superior unit is monitored each warehouse in real time by the internet open and close situations such as ventilation.
The transmission course of concrete depot data stream comprises:
1. gather each storehouse temperature, humidity information by humidity temperature pickup; Real time video signals by each window of camera collection;
2. the programmable logic controller of each storehouse (PLC) receives signals such as temperature, humidity;
3. the control computer in whole warehouse receives the signals such as temperature, humidity and each window switching ventilation that each storehouse spreads out of; The control computer receives the vision signal of camera collection;
4. information such as the temperature of each storehouse of warehouse, humidity and the switching of each window, ventilation are imported the internet into; The real time video signals of each window imports the internet into.
5. superior unit is monitored the information such as each storehouse temperature, humidity in each warehouse and the real time video signals of each window in real time by the internet.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (7)
1. warehouse automatic ventilation control system, it is characterized in that, comprise window frame, described window frame is provided with fan external member and window, and is hinged by hinge between the upper limb of described window and the window frame, is provided with cylinder between described window frame and the window, longitudinally be provided with directive slide track on the described window, be provided with slide block in the described directive slide track, the cylinder body of described cylinder is fixed on the described window frame, and the piston rod of described cylinder and described slide block are hinged;
Also comprise the PLC controller, be used to control the operation of described cylinder and fan external member;
Described directive slide track is provided with T type groove, the T type piece of described slide block for matching with described T type groove;
Described slide block inside is provided with cavity, the both sides of described cavity are respectively equipped with the hole, and steel ball is put at the position of the two side holes in described cavity respectively, be provided with spring between two steel balls, the diameter in described hole is less than or equal to half of diameter of described steel ball, and the exposed portions serve of described steel ball withstands on the inwall of described directive slide track both sides.
2. warehouse according to claim 1 automatic ventilation control system is characterized in that the edge of described window is provided with the window reinforcing rib, and the below of described cylinder is fixed with camera.
3. warehouse according to claim 1 automatic ventilation control system is characterized in that, the cylinder body of described cylinder is fixed by cylinder stay bolt and cylinder support, and described cylinder support is fixed on the described window frame by the set bolt group.
4. warehouse according to claim 3 automatic ventilation control system is characterized in that, the piston rod of described cylinder links to each other with the hinge contiguous block by branch sleeve, and described hinge contiguous block and described slide block are hinged by bearing pin.
5. warehouse according to claim 4 automatic ventilation control system is characterized in that, the opening angle of described window is less than or equal to 70 °.
6. warehouse according to claim 5 automatic ventilation control system is characterized in that the outside of described window is provided with dust collecting sleeve, and after described window was opened, opening was over against described dust collecting sleeve.
7. a warehouse is characterized in that, this warehouse is provided with each described warehouse automatic ventilation control system of a plurality of claims 2 to 6;
The cylinder of a plurality of warehouses automatic ventilation control system is driven by a cover pneumatic system, described pneumatic system comprises the 3 position-5 way solenoid operated directional valve, when the work of the right position of described 3 position-5 way solenoid operated directional valve, the piston rod of described cylinder stretches out, when the work of position, a described 3 position-5 way solenoid operated directional valve left side, the piston rod of described cylinder is regained, and when described 3 position-5 way solenoid operated directional valve was in meta, the gas circuit of described cylinder and described pneumatic system disconnected;
Described warehouse is provided with the temperature and humidity sensor, and the window of described warehouse automatic ventilation control system is provided with out stopping means and closes stopping means, describedly drives stopping means and closes stopping means near switch or touch switch or optoelectronic switch;
Each storehouse in described warehouse is provided with a cover automatic ventilation control system, by a PLC controller control, described PLC controller can be controlled the switch and the ventilation of a plurality of windows of a storehouse, described PLC controller is connected with the control computer in whole warehouse, the PLC controller of described each storehouse of computer control, and then the switch and the ventilation of each window of control storehouse, described control computer links to each other with the internet;
Whether window opens ventilation is controlled by computer or opens automatically according to the temperature and humidity situation of each storehouse, control flow is as follows: the temperature and humidity sensor inputs to the PLC controller with the temperature and humidity signal, after temperature and humidity reaches preset threshold, the PLC controller sends control signal, make the right position work of 3 position-5 way solenoid operated directional valve, cylinder piston rod stretches out, window is progressively opened, when window is opened to 70 when spending, drive stopping means and signal to the PLC controller, PLC controller control fan external member starts ventilates, after the time that is vented to setting, PLC controller control 3 position-5 way solenoid operated directional valve commutates to the work of position, a left side, and the cylinder piston rod withdrawal is progressively closed window, when window is closed fully, close stopping means and signal to the PLC controller, PLC controller control 3 position-5 way solenoid operated directional valve is in meta, the cylinder piston rod stop motion;
Described camera is filmed the real time video signals of each window, imports the control computer in warehouse, and imports the real time video signals of each window into internet, and superior unit is monitored the real-time condition in each warehouse in real time by the internet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101615448A CN101832090B (en) | 2010-04-27 | 2010-04-27 | Warehouse and automatic ventilation control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101615448A CN101832090B (en) | 2010-04-27 | 2010-04-27 | Warehouse and automatic ventilation control system thereof |
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| CN101832090A CN101832090A (en) | 2010-09-15 |
| CN101832090B true CN101832090B (en) | 2011-12-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102393764B (en) * | 2011-11-14 | 2015-04-22 | 哈尔滨蒙鹰科技有限公司 | Automatic dehumidification system for food storehouse |
| CN107504774B (en) * | 2017-08-28 | 2018-06-08 | 广州市仓配速效电子商务有限责任公司 | A kind of warehouse intelligence drying system |
| CN107605221A (en) * | 2017-08-31 | 2018-01-19 | 天津绿之本生物科技有限公司 | A kind of organic fertilizer protection against the tide storage warehouse |
| CN108718724A (en) * | 2018-05-29 | 2018-11-02 | 虞城县明强仓储设备有限公司 | A kind of fully-automatic intelligent silo air vent |
| CN110094145A (en) * | 2019-06-06 | 2019-08-06 | 俞昭露 | One kind being used for the liftable air hole in workshop upper end |
| CN110671021A (en) * | 2019-09-18 | 2020-01-10 | 安徽恒明工程技术有限公司 | Temperature control window for granary |
| CN110725596A (en) * | 2019-10-22 | 2020-01-24 | 北京粮猫科技有限公司 | Full cast-in-place self-ventilation double-layer roof grain storage bin structure and construction method |
| CN114084335B (en) * | 2021-11-19 | 2022-12-23 | 扬州中远海运重工有限公司 | Shutter for ship chimney |
| CN118621953A (en) * | 2024-06-07 | 2024-09-10 | 中科捷纳(北京)科技发展有限公司 | A thermal insulation granary roof structure based on nano-sheets |
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| CN101832090A (en) | 2010-09-15 |
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