CN208307102U - High-pressure vortex blower suction bag opens a bag route controller - Google Patents
High-pressure vortex blower suction bag opens a bag route controller Download PDFInfo
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- CN208307102U CN208307102U CN201820483415.2U CN201820483415U CN208307102U CN 208307102 U CN208307102 U CN 208307102U CN 201820483415 U CN201820483415 U CN 201820483415U CN 208307102 U CN208307102 U CN 208307102U
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- venthole
- bag
- negative pressure
- suction nozzle
- opens
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Abstract
The utility model belongs to packing machine technical field, the high-pressure vortex blower suction bag of proposition opens a bag route controller, including negative pressure pump, negative pressure pump steam inlet is connected to by gas circuit switching control box with the suction nozzle for opening bag, cavity is set in gas circuit switching control box, it is provided with the first venthole being connected to air inlet on gas circuit switching control box, is additionally provided with the second venthole being connected to suction nozzle, the first venthole and the second venthole and is connected to by cavity.Suction nozzle is two groups, there is gap between two groups of suction nozzles, and every group of suction nozzle is connected to by a screwed pipe with the second venthole.The utility model is skillfully constructed, easy to operate, solves device structure complexity in the prior art, failure and maintenance point are more, the bad technical problem of using effect.
Description
Technical field
The utility model belongs to packing machine technical field, is related to high-pressure vortex blower suction bag and opens a bag route controller.
Background technique
Currently, Bulk plastic bag package machine in the market has toilet paper packing machine, vermicelli sack filling machine and other using plastics
Bag film packs the package packing machine of product, and used packaging bag single side thickness is generally lower than 0.07 millimeter.These package packing machinies
Common ground be that will use prefabricated plastic film bag, require the plastic film that will be placed in the equipment course of work
Bag, is picked up, and sack is strutted by the sucker on negative pressure device by negative pressure device, facilitates the sack clamping device in equipment
It is gripped, carries out the filling work of next step.But traditional similar packaging facilities negative pressure part is all made of vacuum and bears
Press pump, air negative pressure generator and special (purpose) rubber sucker, the negative pressure suction bag open the bag device of component devices.The characteristics of vacuum and negative pressure pump
It is the air negative pressure value height (being exactly that suction is big) generated, but air mass flow is small, and the structure of vacuum and negative pressure pump is more relative complex,
Some also needs intermittent oiling and maintenance, and manufacturing cost is high.If it is desired to the negative pressure air needs for obtaining big flow are powerful
Negative pressure pump, input cost and energy consumption will increase very much.The characteristics of air negative pressure generator is that structure is simply small and exquisite, still
It generates negative pressure air and needs to consume a large amount of positive pressure air, transfer efficiency is low, and noise is big.Both the above generates the structure of negative pressure,
The negative pressure value and flow of generation are all similar.
Since the negative pressure air flow of generation is small, it is necessary to which rubber suction cups, sealing effect is wanted when adsorption plastic film bag
It is good.Once otherwise sucker gas leakage, negative pressure air will horse back pressure release, cause rubber suction cups to separate with the sack being adsorbed, thus
Influence the follow-up operation of equipment.Light then sack falls off, again suction bag, influences the equipment speed of service；It is heavy then to may cause equipment stifled
Material, bulk cargo, card machine, cause equipment operation stability to decline.But due to the thickness of plastic film bag, typically 0.07
Millimeter is hereinafter, after sucker suction, and plastic film bag meeting nature generates many folds during transporting and holding bag, to destroy rubber
The adsorption plane of glue sucker and plastic film causes sucker gas leakage pressure release.The service life of rubber suction cups is also very limited simultaneously, needs
It often to replace.Existing equipment solves disadvantages described above, generally requires to install many auxiliary equipments additional, increases equipment operation stability.
The complexity of device structure is also increased simultaneously, failure and maintenance point also will increase.Congenital structure is not solved inherently
Defect.
Utility model content
The utility model proposes high-pressure vortex blower suction bags to open a bag route controller, solves equipment knot in the prior art
Structure is complicated, and failure and maintenance point are more, the bad technical problem of using effect.
The technical solution of the utility model is achieved in that
High-pressure vortex blower suction bag opens a bag route controller, including negative pressure pump, and the negative pressure pump steam inlet passes through gas circuit
Switching control box is connected to the suction nozzle for opening bag,
Cavity is set in the gas circuit switching control box, is provided on the gas circuit switching control box and is connected to the air inlet
The first venthole, be additionally provided with the second venthole being connected to the suction nozzle, first venthole and second ventilation
Hole is connected to by the cavity.
As further technical solution, the suction nozzle is two groups, there is gap between suction nozzle described in two groups, and every group of suction nozzle is logical
A screwed pipe is crossed to be connected to second venthole.
As further technical solution, the gas circuit switching control box includes box body, the box body side be provided with
First venthole of the air inlet connection, the other side are provided with cover board, and second ventilation is provided on the cover board
Hole, the cavity are surrounded by the box body and the cover board, and second venthole is two or more, the suction nozzle and described the
The connection of two ventholes.
As further technical solution, the baffle for the second venthole described in block is additionally provided on the box body.
As further technical solution, guide plate is provided in the cavity, be provided on the guide plate with it is described
The one-to-one third venthole of second venthole, the guide plate and the close side of the cover board are provided with for the baffle
Mobile card slot.
As further technical solution, described baffle one end is plugged in the card slot, and the other end extends the box
Body is connect with the power device being arranged on the box body.
As further technical solution, second venthole is three or more, two the second ventholes and two spiral shells
Line pipe is separately connected, and is provided with filter cotton on other second ventholes.
As further technical solution, filter cotton fixed plate is provided on the cover board, the filter cotton is arranged in institute
It states in cover board and the enclosed cavity of the filter cotton fixed plate.
As further technical solution, the negative pressure pump is high pressure whirlpool blower.
As further technical solution, muffler is provided on the exhaust outlet of the negative pressure pump.
The utility model is using principle and has the beneficial effect that
1, the utility model is provided with several suction nozzles for opening bag, and by the setting of gas circuit switching control box so that
These suction nozzles are connected to the air inlet of negative pressure pump, in use, user can control negative pressure pump work as needed, and then are realized not
To the absorption of polybag different zones and then realize that polybag opens bag operation with suction nozzle.The setting of gas circuit switching control box is then real
Control while having showed a negative pressure pump to multiple suction nozzles ensure that the stability of plastic bag opening operation, and this product structure
Simply, long service life, without especially accurate component, maintenance cost is low.The device is not necessarily to filling engine oil, so being used for food
Composite sanitary safety requirements in package packing machine.The covering device can be used in the big packing machine of vermicelli, it can also be used to which other use plastics
On the packing machine that film packaging bag is packed, such as toilet paper packing machine tool.
Suction nozzle can be multiple groups in the utility model, be set as two groups, and when use can make it distinguish the two sides of adsorption plastic bag, this
The bag of opening that polybag can be realized in one setting operates, and in turn ensures suction nozzle quantity less in equipment, it is ensured that and its structure is simple,
Production and maintenance cost are cheap, meet its requirement.The setting of screwed pipe is convenient for user according to the needs of use to suction nozzle position
It is adjusted flexibly, increases the flexibility and convenience that equipment uses.
2, gas circuit switching control box uses regular box body structure, the first venthole and the second venthole in the utility model
Set up the residence time for reducing gas in box body two sides after the second venthole enters box body in it separately, ensure that equipment
Working efficiency.Meanwhile second venthole be set as more than two so that the quantity of the second venthole can be with the quantity one of screwed pipe
It causes, or more than the quantity of screwed pipe.Second number of air hole be more than screwed pipe quantity when, when suction nozzle is blocked, negative pressure pump into
Port will not block, this setting effectively ensures that the cooling effect of negative pressure pump is good, thereby reduce negative pressure pump
The risk of failure ensure that its normal use.
In use, user can flexibly control inserting or pull out for baffle, and then realize according to the working condition of different suction nozzles
The normal air inlet of corresponding with suction nozzle the second venthole or closure.The setting of baffle so that user can according to the use needs of equipment,
The air inlet of different second ventholes is flexibly controlled, and then realizes the opening and closing of suction nozzle, this setting further increases equipment use
Flexibility and convenience, meet its use needs.Wherein, baffle is plugged on box body, and baffle had been inserted into the intracorporal depth of box both
It can be controlled by power device by manually adjusting.
3, the utility model has also added the guide plate parallel with cover board in box body, and has added lead to second on it
The one-to-one third venthole of stomata, while the utility model has also been added on guide plate for guide baffle plate moving direction
Card slot, and card slot and third venthole correspond.In use, user can be according to the service condition of equipment, by baffle along card
Slot is inserted into box body, and the second venthole (or third venthole) is shut.Wherein guide plate is matched with baffle, ensure that second
Venthole blocks reduces its risk that gas leakage occurs completely, ensure that the using effect of equipment is good；The setting of card slot is then true
It has protected baffle and has remained vertical state, ensure that its positional relationship between guide plate is stablized, further reduced baffle
After putting down, the risk of gas leakage occurs for the second venthole, ensure that the normal use of equipment.
The setting of power device realizes the automation control of baffle, reduces the labor intensity of equipment operation, improves
The accuracy of equipment operation meets it and uses needs.The setting of filter cotton reduces the risk that impurity enters in box body or cavity,
Ensure that the unimpeded of the second venthole, third venthole and the first venthole, so ensure negative pressure pump normal use and compared with
Low failure rate.The equipment of filter cotton fixed plate replaces it according to the service condition of filter cotton convenient for user, meets it
Requirement.
4, the high-pressure vortex that the proposed product negative pressure gas source part (negative pressure pump) of the utility model uses market on sale
Blower, its main feature is that can produce the positive pressure air and negative pressure air of big flow.The negative pressure value of its negative pressure air generated, relatively
It is much smaller in negative pressure pump and vacuum generator.The device is mainly used for adsorption plastic bag film, very light weight does not need spy
Not high negative pressure value.But the negative pressure air of generated big flow, it can solve the negative pressure pump and vacuum of small flow high negative pressure
The defect of generator.Use the heavy caliber suction nozzle of the device institute speciality, adsorption plastic bag film.Even if plastic film bag wrinkles
Wrinkle causes gas leakage at suction nozzle, and since the flow of negative pressure air is very big, plastic film bag is very light, and modeling also can be firmly sucked in suction nozzle
Expect bag film.This setting solves the problems, such as to fall during suction bag bag.
High-pressure vortex blower uses the field to need the bigbore air-flow switching device of big flow simultaneously, in the market at present
Institute's sale of electricity magnet valve, is difficult to find suitable for the device.So the high-pressure vortex blower adds the big mouth of speciality in air inlet
Diameter gas circuit switching control box.Behind heavy caliber gas circuit switching control box, two groups of spies are connected with by common dust catcher screwed pipe
The heavy caliber suction nozzle of matter.Heavy caliber suction nozzle is made of Metal Material Welding, and the service life is long, does not need often to replace.The utility model
Muffler has been added in the exhaust ports of negative pressure pump, has effectively reduced the noise issued in equipment use process.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the structural schematic diagram of gas circuit switching control box in the utility model；
In figure: 1- negative pressure pump, 2- gas circuit switching control box, 21- box body, 22- cover board, 3- suction nozzle, the first venthole of 4-, 5-
Second venthole, 6- screwed pipe, 7- baffle, 8- guide plate, 9- third venthole, 10- card slot, 11- power device, 12- filtering
Cotton, 13- filter cotton fixed plate, 14- muffler.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Fig. 1~2, the utility model proposes high-pressure vortex blower suction bag open a bag route controller, including it is negative
Press pump 1,1 air inlet of negative pressure pump are connected to by gas circuit switching control box 2 with the suction nozzle 3 for opening bag,
Cavity is set in gas circuit switching control box 2, and the first ventilation being connected to air inlet is provided on gas circuit switching control box 2
Hole 4, is additionally provided with the second venthole 5 being connected to suction nozzle 3, and the first venthole 4 is connected to the second venthole 5 by cavity.
In use, negative pressure pump 1 starts, gas enters negative pressure through suction nozzle 3, gas circuit switching control box 2 and 1 air inlet of negative pressure pump
In pump 1, then by the discharge of 1 exhaust outlet of negative pressure pump, during which suction nozzle 3 generates suction and can adsorb polybag, and user can be according to control
The opening and closing of negative pressure pump 1 processed, realization open bag, put the operations such as bag, and the number of suction nozzle 3 can also flexibly be set according to the bag needs of opening of polybag
It sets.
The utility model is provided with several suction nozzles 3 for opening bag, and by the setting of gas circuit switching control box 2 so that
These suction nozzles 3 are connected to the air inlet of negative pressure pump 1, in use, user can control the work of negative pressure pump 1, Jin Ershi as needed
Existing different suction nozzles 3 are to the absorption of polybag different zones and then that realizes polybag open bag operation.Gas circuit switching control box 2 is set
It sets, control while realizing a negative pressure pump 1 to multiple suction nozzle 3, ensure that the stability of plastic bag opening operation, and this
Product structure is simple, long service life, and without especially accurate component, maintenance cost is low.The device is not necessarily to filling engine oil, so
For composite sanitary safety requirements in food packing machine.The covering device can be used in the big packing machine of vermicelli, it can also be used to other
On the packing machine packed using plastic film packaging bag, such as toilet paper packing machine tool.
Further, suction nozzle 3 is two groups, there is gap between two groups of suction nozzles 3, and every group of suction nozzle 3 passes through a screwed pipe 6 and second
Venthole 5 is connected to.
Suction nozzle 3 can be multiple groups in the utility model, be set as two groups, and when use can make it distinguish the two sides of adsorption plastic bag,
The bag of opening that polybag can be realized in this setting operates, and in turn ensures 3 quantity of suction nozzle less in equipment, it is ensured that the letter of its structure
Single, production and maintenance cost are cheap, meet its requirement.The setting of screwed pipe 6 is convenient for user according to the needs of use to suction nozzle 3
Position is adjusted flexibly, and flexibility and convenience that equipment uses are increased.
Further, gas circuit switching control box 2 includes box body 21, and it is logical that 21 side of box body is provided with first be connected to air inlet
Stomata 4, the other side are provided with cover board 22, and the second venthole 5 is provided on cover board 22, and cavity is surrounded by box body 21 and cover board 22,
Second venthole 5 is two or more, and suction nozzle 3 is connected to the second venthole 5.
Gas circuit switching control box 2 uses regular 21 structure of box body, the first venthole 4 and the second ventilation in the utility model
The residence time that gas is reduced in 21 two sides of box body after the second venthole 5 enters box body 21 in it is set up in hole 5 separately, guarantees
The working efficiency of equipment.Meanwhile second venthole 5 be set as more than two so that the quantity of the second venthole 5 can be with screwed pipe
6 quantity is consistent, or more than the quantity of screwed pipe 6.When second venthole, 5 quantity is more than 6 quantity of screwed pipe, when suction nozzle 3 is blocked
When plug, 1 air inlet of negative pressure pump will not be blocked, this setting effectively ensures that the cooling effect of negative pressure pump 1 is good, and then be dropped
The risk that low negative pressure pump 1 breaks down, ensure that its normal use.
Further, the baffle 7 for the second venthole of block 5 is additionally provided on box body 21.
In use, user can flexibly control inserting or pull out for baffle 7, Jin Ershi according to the working condition of different suction nozzles 3
The now normal air inlet of second venthole 5 corresponding with suction nozzle 3 or closure.The setting of baffle 7 is so that user can be according to the use of equipment
It needs, flexibly controls the air inlet of different second ventholes 5, and then realize the opening and closing of suction nozzle 3, this setting, which further increases, to be set
The standby flexibility and convenience used meets it and uses needs.Wherein, baffle 7 is plugged on box body 21, and baffle 7 is inserted into box body
Depth in 21 not only can be by manually adjusting, but also can be controlled by power device 11.
Further, it is provided with guide plate 8 in cavity, is provided on guide plate 8 and the one-to-one third of the second venthole 5
Venthole 9, guide plate 8 and the close side of cover board 22 are provided with the card slot 10 mobile for baffle 7.
The utility model has also added the guide plate 8 parallel with cover board 22 in box body 21, and has added on it and
The one-to-one third venthole 9 of two venthole 5, while the utility model has also been added on guide plate 8 for guide baffle plate 7
The card slot 10 of moving direction, and card slot 10 and third venthole 9 correspond.In use, user can be according to the use feelings of equipment
Baffle 7 is inserted into box body 21 along card slot 10, the second venthole 5 (or third venthole 9) is shut by condition.Wherein guide plate 8 with
Baffle 7 matches, and ensure that the second venthole 5 blocks reduces its risk that gas leakage occurs completely, ensure that the use of equipment
It works well；The setting of card slot 10 then ensures that baffle 7 remains vertical state, ensure that its position between guide plate 8
It sets relationship to stablize, further reduced after baffle 7 puts down, the risk of gas leakage occurs for the second venthole 5, ensure that the normal of equipment
It uses.
Further, 7 one end of baffle is plugged in card slot 10, and the other end extends box body 21 and moving on box body 21 is arranged in
Power device 11 connects.
The setting of power device 11 realizes the automation control of baffle 7, reduces the labor intensity of equipment operation, improves
The accuracy of equipment operation meets its and uses needs.
Further, the second venthole 5 is three or more, and two the second ventholes 5 are separately connected with two screwed pipes 6,
Filter cotton 12 is provided on his the second venthole 5.
The setting of filter cotton 12 reduces the risk that impurity enters in box body 21 or cavity, ensure that the second venthole 5,
Three ventholes 9 and the first venthole 4 it is unimpeded, and then ensure the normal use and lower failure rate of negative pressure pump 1.
Further, filter cotton fixed plate 13 is provided on cover board 22, the setting of filter cotton 12 is fixed in cover board 22 with filter cotton
In the enclosed cavity of plate 13.
The equipment of filter cotton fixed plate 13 replaces it according to the service condition of filter cotton 12 convenient for user, meets it
Requirement.
Further, negative pressure pump 1 is high pressure whirlpool blower.
The high-pressure vortex wind that the proposed product negative pressure gas source part (negative pressure pump 1) of the utility model uses market on sale
Machine, its main feature is that can produce the positive pressure air and negative pressure air of big flow.The negative pressure value of its negative pressure air generated, relative to
Negative pressure pump and vacuum generator are much smaller.The device is mainly used for adsorption plastic bag film, very light weight is not needed especially
High negative pressure value.But the negative pressure air of generated big flow, it can solve the negative pressure pump and vacuum hair of small flow high negative pressure
The defect of raw device.Use the heavy caliber suction nozzle 3 of the device institute speciality, adsorption plastic bag film.Even if plastic film bag wrinkles
Wrinkle causes gas leakage at suction nozzle 3, and since the flow of negative pressure air is very big, plastic film bag is very light, and suction nozzle 3 also can firmly be sucked
Plastic film bag.This setting solves the problems, such as to fall during suction bag bag.
High-pressure vortex blower uses the field to need the bigbore air-flow switching device of big flow simultaneously, in the market at present
Institute's sale of electricity magnet valve, is difficult to find suitable for the device.So the high-pressure vortex blower adds the big mouth of speciality in air inlet
Diameter gas circuit switching control box 2.Behind heavy caliber gas circuit switching control box 2, two groups are connected with by common dust catcher screwed pipe 6
The heavy caliber suction nozzle 3 of speciality.Heavy caliber suction nozzle 3 is made of Metal Material Welding, and the service life is long, does not need often to replace.
Further, muffler 14 is provided on the exhaust outlet of negative pressure pump 1.
The utility model has added muffler 14 in the exhaust ports of negative pressure pump 1, effectively reduces in equipment use process
The noise of sending.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. high-pressure vortex blower suction bag opens a bag route controller, which is characterized in that including negative pressure pump (1), the negative pressure pump (1)
Air inlet is connected to by gas circuit switching control box (2) with the suction nozzle (3) for opening bag,
Cavity is set in the gas circuit switching control box (2), is provided on the gas circuit switching control box (2) and connects with the air inlet
Logical the first venthole (4) is additionally provided with the second venthole (5) being connected to the suction nozzle (3), first venthole (4)
It is connected to second venthole (5) by the cavity.
2. high-pressure vortex blower suction bag according to claim 1 opens a bag route controller, which is characterized in that the suction nozzle
(3) it is two groups, there is gap between suction nozzle described in two groups (3), every group of suction nozzle (3) is logical with described second by a screwed pipe (6)
Stomata (5) connection.
3. high-pressure vortex blower suction bag according to claim 2 opens a bag route controller, which is characterized in that the gas circuit
Switching control box (2) includes box body (21), and it is logical that box body (21) side is provided with described first be connected to the air inlet
Stomata (4), the other side are provided with cover board (22), are provided with second venthole (5) on the cover board (22), the cavity by
The box body (21) and the cover board (22) surround, second venthole (5) be two or more, the suction nozzle (3) with it is described
Second venthole (5) connection.
4. high-pressure vortex blower suction bag according to claim 3 opens a bag route controller, which is characterized in that the box body
(21) baffle (7) for the second venthole (5) described in block is additionally provided on.
5. high-pressure vortex blower suction bag according to claim 4 opens a bag route controller, which is characterized in that the cavity
It is inside provided with guide plate (8), is provided on the guide plate (8) and ventilates with the one-to-one third of second venthole (5)
Hole (9), the guide plate (8) and the cover board (22) close side are provided with the card slot (10) mobile for the baffle (7).
6. high-pressure vortex blower suction bag according to claim 5 opens a bag route controller, which is characterized in that the baffle
(7) one end is plugged in the card slot (10), and the other end extends the box body (21) and is arranged on the box body (21)
Power device (11) connection.
7. high-pressure vortex blower suction bag according to claim 3 opens a bag route controller, which is characterized in that described second
Venthole (5) is three or more, and two the second ventholes (5) are separately connected with two screwed pipes (6), other second ventholes
(5) filter cotton (12) are provided on.
8. high-pressure vortex blower suction bag according to claim 7 opens a bag route controller, which is characterized in that the cover board
(22) it is provided on filter cotton fixed plate (13), filter cotton (12) setting is fixed in the cover board (22) with the filter cotton
In the enclosed cavity of plate (13).
9. high-pressure vortex blower suction bag according to claim 1 opens a bag route controller, which is characterized in that the negative pressure
Pumping (1) is high pressure whirlpool blower.
10. described in any item high-pressure vortex blower suction bags open a bag route controller according to claim 1~9, feature exists
In being provided with muffler (14) on the exhaust outlet of the negative pressure pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820483415.2U CN208307102U (en) | 2018-04-08 | 2018-04-08 | High-pressure vortex blower suction bag opens a bag route controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820483415.2U CN208307102U (en) | 2018-04-08 | 2018-04-08 | High-pressure vortex blower suction bag opens a bag route controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208307102U true CN208307102U (en) | 2019-01-01 |
Family
ID=64719228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820483415.2U Expired - Fee Related CN208307102U (en) | 2018-04-08 | 2018-04-08 | High-pressure vortex blower suction bag opens a bag route controller |
Country Status (1)
| Country | Link |
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| CN (1) | CN208307102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112977939A (en) * | 2021-02-26 | 2021-06-18 | 苏州蓝润农业科技有限公司 | Vacuum treatment device for bagged seeds |
-
2018
- 2018-04-08 CN CN201820483415.2U patent/CN208307102U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112977939A (en) * | 2021-02-26 | 2021-06-18 | 苏州蓝润农业科技有限公司 | Vacuum treatment device for bagged seeds |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 |
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| CF01 | Termination of patent right due to non-payment of annual fee |