CN109822860A - A kind of optical cable production feeding system and method for feeding - Google Patents
A kind of optical cable production feeding system and method for feeding Download PDFInfo
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- CN109822860A CN109822860A CN201910090422.5A CN201910090422A CN109822860A CN 109822860 A CN109822860 A CN 109822860A CN 201910090422 A CN201910090422 A CN 201910090422A CN 109822860 A CN109822860 A CN 109822860A
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Abstract
A kind of optical cable production feeding system, each storage tank are provided with the weight sensing instrument for measuring retaining amount inside the storage tank, the information input terminal connection of weight sensing instrument and control device；Warehouse is fed by feed system to each storage tank, and feed system and each gravitation tank link position are provided with individual flow valve, and each flow valve is controlled by control device.Optical cable production feeding system provided by the invention and matched method of feeding, can accurately control storing amount in storage tank.
Description
Technical field
The present invention relates to plastic shapings to be fed technical field, especially a kind of optical cable production feeding system and method for feeding.
Background technique
In optical cable production process, secondary coating and oversheath process are required to by extrusion moulding process.With production
It is carried out continuously, extrusion process needs the continuous supply for carrying out raw material, to guarantee the normal production of cable manufactures.Since optical cable is raw
The requirement successional for extrusion process of production process, for overall feed system, higher requirements are also raised, for example continues
Property feed, automatic opening, clout recycling and recycling after failure after being automatically closed and debug of feeding system etc., these
Demand becomes technical need very urgent in current optical cable production process.
The Chinese patent CN106113436A that the prior art such as applicant oneself submits disclose a kind of production of optical cable from
Dynamic feeding system comprising several storage tanks, the first conveying mechanism are delivered into the raw material suction in warehouse using negative pressure
In respective storage tank；Several storage vats, second conveyor structure are delivered into the raw material suction in storage tank using negative pressure
In respective storage vat；Feed screw in storage vat is squeezed the extruded mould of feeding to optical cable production line by third conveying mechanism
It is interior；One optical cable production line is correspondingly arranged a storage vat, and a storage tank is correspondingly arranged second feed pipe, each storage vat
It is connected to by independent feeding branch pipe with the second all feed pipes, regulating valve is equipped on each feeding branch pipe, by regulating valve
The respective storage vat of control selections is connected to which storage tank, and is adjusted by regulating valve from storage tank feeding to storage vat
Feeding speed.
The patent solves adjustment and control of the prior art for storage tank retaining amount to a certain extent, can also portion
Divide the automatic control realized to storage vat feeding, but still there are the following problems: first, tune of the patent to storage tank retaining amount
Whole to be based primarily upon warehouse discharging allocation proportion, if the material stock of a certain storage tank is excessive, system described in the patent can not reduce this
The retaining amount of storage tank；Second, it is excessively rough for the monitoring of storage tank retaining amount, only pass through upper limit level sensor, lower limit
Whether material stock overflows and insufficient in level sensor monitoring storage tank, is unable to reach storing amount in accurate control storage tank.For this purpose,
Need to provide a kind of Novel optical cable production feeding system.
Summary of the invention
Technical problem to be solved by the present invention lies in optical cable in the prior art production feeding systems to be unable to accurately control
Storing amount in storage tank, and the optical cable production feeding system and feed of storing amount in storage tank can accurately be controlled by providing one kind
Method.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of optical cable production feeding system, comprising:
Several storage vats being fed to optical cable production line；
The storage tank being fed to the storage vat, the number of the storage tank are no less than two；
The warehouse being fed to the storage tank；
The control device that optical cable production feeding system is controlled；
Each storage tank is provided with the weight sensing instrument for measuring retaining amount inside the storage tank, the weight sensing instrument
It is connect with the information input terminal of the control device；The warehouse is fed by feed system to each storage tank, described
Feed system and each gravitation tank link position are provided with individual flow valve, and each flow valve is filled by the control
Set control.
In above-mentioned optical cable production feeding system, the first level sensor and third are respectively provided with inside each storage tank
Level sensor, first level sensor are set to the storage tank top, and the third level sensor is set to institute
Storing pot bottom is stated, first level sensor and the third level sensor are defeated with the information of the control device
Enter end connection；Each storing pot bottom is provided with discharge port, is provided with throttle valve, Mei Gesuo on each discharge port
Throttle valve is stated to be controlled by the control device.
In above-mentioned optical cable production feeding system, the second level sensor is also set up inside each storage tank, described the
Two level sensors are set to the position that the storage tank presets retaining amount, second level sensor and the control device
Information input terminal connection；The discharge port of each storage tank is by mutually independent conveying device to the storage vat
Feed, is provided with valve, each valve is filled by the control between each conveying device and each storage vat
Set control.
In above-mentioned optical cable production feeding system, it is logical that the conveying device is provided with the feed back for recycling unallocated raw material
Road, the feed back channel and the warehouse connection.
In above-mentioned optical cable production feeding system, the number of the storage tank is three.
A kind of method that optical cable production feeding system is fed, includes the following steps:
Step a: when the optical cable production feeding system not running, maximum retaining amount M in the storage tank is measured1, it is default
Retaining amount M0And minimum retaining amount M2；
Step b: start the optical cable production feeding system, each flow valve is with initial nominal flow F0Carry out into
Material；
Step c: each real-time retaining amount of storage tank is monitored by the weight sensing instrument, obtains each storage
The real-time retaining amount M of batch cant；
Step d: by each real-time retaining amount M of storage tanktBe sent to the control device, the control device according to
The real-time retaining amount MtNumerical value adjust the flow F of the flow valvet。
In the above method, the FtMeet following parameter setting: Ft=F0×(M1-Mt)/(M1-M0), wherein M2<Mt<M1。
In the above method, deposited when the third level sensor monitors in a certain storage tank retaining amount less than minimum
Doses M2When, starting step e: monitoring information is sent to the control device, the control dress by the third level sensor
Set the corresponding throttle valve of the closing storage tank, duration T1Afterwards, the control device opens the storage tank
The corresponding throttle valve；
It is more than maximum retaining amount M when first level sensor monitors retaining amount in a certain storage tank1When, it opens
Dynamic step f: monitoring information is sent to the control device by first level sensor, and it is described that the control device closes this
The corresponding flow valve of storage tank, duration T2Afterwards, the control device opens the corresponding stream of the storage tank
Measure valve.
Further include step g in the above method: presetting time Tx, second level sensor by monitoring information reality
When be sent to the control device, such as second level sensor send monitoring information be " having material " and setting time Tx
Do not change inside, then the control device adjusts the valve, to increase feed speed of the storage tank to the storage vat
Degree；The monitoring information sent such as second level sensor is " no material " and in setting time TxDo not change inside, then it is described
Control device adjusts the valve, to reduce feeding speed of the storage tank to the storage vat.
In the above method, the step g includes:
When the monitoring information that corresponding second level sensor of a certain storage tank is sent is " having material " and is setting
Set time TxWhen not changing inside, the control device opens valve corresponding to the storage tank；Such as storage
Valve corresponding to batch can has been opened, then the control device closes valve corresponding to remaining storage tank；
When the monitoring information that corresponding second level sensor of a certain storage tank is sent is " no material " and is setting
Set time TxWhen not changing inside, the control device closes valve corresponding to the storage tank.
The above technical solution of the present invention has the following advantages over the prior art:
1. optical cable of the invention produces feeding system, each storage tank is provided with for measuring retaining amount inside the storage tank
Weight sensing instrument, the information input terminal of weight sensing instrument and control device connects；Warehouse is fed by feed system to each storage tank, into
Material system and each gravitation tank link position are provided with individual flow valve, and each flow valve is controlled by control device.It is such
Design and matched method of feeding, monitor the material stock in storage tank in real time by weight sensing instrument, information passes through control
Flow valve is controlled by certain logical relation after device processing processed, to always control the retaining amount in storage tank in doses.
2. optical cable of the invention produces feeding system, the logical relation of control device control flow valve follows following formula:
Ft=F0×(M1-Mt)/(M1-M0), wherein M2<Mt<M1.Such design can make the operation of optical cable production feeding system more
It is smooth, it ensures the balance of storing amount in storage tank, while can also guarantee the versatility of formula to a certain extent, expands this light
The use scope of cable production feeding system.
3. optical cable of the invention produces feeding system, the first level sensor and third are respectively provided with inside each storage tank
Level sensor, the first level sensor are set to storage tank top, and third level sensor is set to storing pot bottom, and first
Level sensor and third level sensor are connect with the information input terminal of control device；Each storing pot bottom is provided with
Discharge port is provided with throttle valve on each discharge port, and each throttle valve is controlled by control device.It is such design and therewith
Whether matched method of feeding is more than material stock to storage tank retaining amount by the first level sensor and third level sensor
Amount limit is monitored, and after being handled by control device, is controlled throttle valve, to guarantee in extreme circumstances, this
Optical cable production feeding system can be run with ensured sustained development.
4. optical cable of the invention produces feeding system, the second level sensor, the second material are also set up inside each storage tank
Level sensor is set to the position that storage tank presets retaining amount, the information input terminal company of the second level sensor and control device
It connects；The discharge port of each storage tank is fed by mutually independent conveying device to storage vat, each conveying device and each storage
Valve is provided between charging basket, each valve is controlled by control device.Such design and matched method of feeding,
This optical cable produces feeding system normal operating condition, can be discharged by the quantity that control device control valve is opened and closed to storage tank
Amount is finely adjusted, and ensures that this optical cable production feeding system can be run with ensured sustained development.
5. optical cable of the invention produces feeding system, it is logical that conveying device is provided with the feed back for recycling unallocated raw material
Road, feed back channel and warehouse connection.On the one hand such design can ensure the recycling of unused raw material, avoid wasting；It is another
Raw material can also be returned to warehouse by feed back channel, thus to storage tank when storage tank retaining amount is more than rated capacity by aspect
Middle storing amount is adjusted.
Detailed description of the invention
In order to make the content of the present invention more clearly understood, it below according to specific embodiments of the present invention and combines
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is the system schematic of optical cable production feeding system；
Fig. 2 is the partial system diagram of part A in Fig. 1；
Fig. 3 is the control system schematic diagram of optical cable production feeding system.
Appended drawing reference indicates in figure are as follows: the warehouse 1-, 2- optical cable production line, the first valve of 31-, the second valve of 32-, 33- the
Three valves, 41- first throttle valve, 42- second throttle, 43- third throttle valve, 5- feed system, the first feeding device of 51-,
The second feeding device of 52-, 53- third feeding device, 61- first flow valve, 62- second flow valve, 63- third flow valve,
The first storage tank of 71-, the second storage tank of 72-, 73- third storage tank, the first conveying device of 81-, the second conveying device of 82-, 83-
Third conveying device, the first level sensor of 91-, the second level sensor of 92-, 93- third level sensor, 10- check weighing
Instrument, 11- discharge port, 12- feed back channel, 13- storage vat, 14- feed system, 15- control device.
Specific embodiment
As shown in Figure 1-3, being the preferred embodiment of optical cable feeding system and method for feeding
In the present embodiment, optical cable production feeding system include: several storage vats 13 being fed to optical cable production line 2,
The warehouse 1 and feeding system is produced to the optical cable that storage tank, the Xiang Suoshu storage tank being fed to the storage vat 13 are fed
The control device 15 controlled.In the present embodiment, the number of the storage tank is no less than two.Further, the storage
Batch can number is three, and the storage tank is respectively the first storage tank 71, the second storage tank 72 and third storage tank 73.
In the present embodiment, the storage vat 13 is fed by feed system 14 to the optical cable production line 2.
Each storage tank is provided with the weight sensing instrument 10 for measuring retaining amount inside the storage tank, the check weighing
Instrument 10 is connect with the information input terminal of the control device 15；The warehouse 1 is supplied by feed system 5 to each storage tank
Material, the feed system 5 are provided with individual flow valve with each gravitation tank link position, and each flow valve is by institute
State the control of control device 15.In the present embodiment, the bottom of the storage tank is arranged in the weight sensing instrument 10.
In the present embodiment, the feed system 5 is fed by the first feeding device 51 to first storage tank 71, is led to
It crosses the second feeding device 52 to be fed to second storage tank 72, be supplied by third feeding device 53 to the third storage tank 73
Material.Correspondingly, it is provided with first flow valve 61 on first feeding device 51, is provided on second feeding device 52
Two flow valves 62 are provided with third flow valve 63 on the third feeding device 53.
It is respectively provided with the first level sensor 91 and third level sensor 93 inside each storage tank, described
One level sensor 91 is set to the storage tank top, and the third level sensor 93 is set to the storing pot bottom,
First level sensor 91 and the third level sensor 93 connect with the information input terminal of the control device 15
It connects；Each storing pot bottom is provided with discharge port 11, is provided with throttle valve on each discharge port 11, each described
Throttle valve is controlled by the control device 15.In the present embodiment, the discharge port 11 corresponding to first storage tank 71
On be provided with first throttle valve 41, be provided with second throttle on the discharge port 11 corresponding to second storage tank 72
42, third throttle valve 43 is provided on the discharge port 11 corresponding to the third storage tank 73.
The second level sensor 92 is also set up inside each storage tank, second level sensor 92 is set to
The storage tank presets the position of retaining amount, and the information input terminal of second level sensor 92 and the control device 15 connects
It connects；The discharge port 11 of each storage tank is fed by mutually independent conveying device to the storage vat 13, each
Valve is provided between the conveying device and each storage vat 13, each valve is controlled by the control device 15
System.
In the present embodiment, first storage tank 71 passes through the first conveying device 81 to storage vat feed 13, and
The first valve 31 is provided between first conveying device 81 and the storage vat 13；Second storage tank 72 passes through
Second conveying device 82 is arranged between second conveying device 82 and the storage vat 13 to storage vat feed 13
There is the second valve 32；The third storage tank 73 by third conveying device 83 to storage vat feed 13, and described the
Third valve 33 is provided between three conveying devices 83 and the storage vat 13.
The conveying device is provided with the feed back channel 12 for recycling unallocated raw material, the feed back channel 12 with it is described
1 connection of warehouse.In the present embodiment, first conveying device 81, second conveying device 82 and third conveying
Device 83 is respectively provided with the feed back channel 12.
The method being fed using this optical cable production feeding system, is included the following steps:
Step a: when the optical cable production feeding system not running, maximum retaining amount M in the storage tank is measured1, it is default
Retaining amount M0And minimum retaining amount M2；
Step b: start the optical cable production feeding system, each flow valve is with initial nominal flow F0Carry out into
Material；
Step c: being monitored each real-time retaining amount of storage tank by the weight sensing instrument 10, obtains each described
The real-time retaining amount M of storage tankt；
Step d: by each real-time retaining amount M of storage tanktIt is sent to the control device 15, the control device 15
According to the real-time retaining amount MtNumerical value adjust the flow F of the flow valvet.In the present embodiment, the FtMeet following ginseng
Number setting: Ft=F0×M1-Mt/M1-M0, wherein M2<Mt<M1。
Step e[is less than minimum material stock when the third level sensor 93 monitors retaining amount in a certain storage tank
Measure M2When, starting step e]: monitoring information is sent to the control device 15, the control by the third level sensor 93
Device 15 closes the corresponding throttle valve of the storage tank, duration T1Afterwards, it is described to open this for the control device 15
The corresponding throttle valve of storage tank；
Step f[is more than maximum material stock when first level sensor 91 monitors retaining amount in a certain storage tank
Measure M1When, starting step f]: monitoring information is sent to the control device 15, the control by first level sensor 91
Device 15 closes the corresponding flow valve of the storage tank, duration T2Afterwards, it is described to open this for the control device 15
The corresponding flow valve of storage tank.
Step g: time T is presetx, monitoring information is sent to the control by second level sensor 92 in real time
The monitoring information that device 15, such as second level sensor 92 are sent is " having material " and in setting time TxDo not change inside,
Then the control device 15 adjusts the valve, to increase feeding speed of the storage tank to the storage vat；As described in
The monitoring information that second level sensor 92 is sent is " no material " and in setting time TxDo not change inside, then the control device
15 adjust the valve, to reduce feeding speed of the storage tank to the storage vat.
In the present embodiment, the step g includes: when corresponding second level sensor 92 of a certain storage tank
The monitoring information of transmission is " having material " and in setting time TxWhen not changing inside, the control device 15 opens one, and this is described
Valve corresponding to storage tank；Valve corresponding to storage tank as described in this has been opened, then the control device 15 closes one
Valve corresponding to remaining a described storage tank；It is sent when corresponding second level sensor 92 of a certain storage tank
Monitoring information is " no material " and in setting time TxWhen not changing inside, the control device 15 closes the storage tank
Corresponding valve.
Further, by taking this preferred embodiment a certain moment as an example, step g includes: inside first storage tank 71
92 duration T of the second level sensorxWhen internal feedback monitoring information is " having material ", the control device 15 is beaten at random
First valve 31 is opened, when all first valve 31 is in opening state, the control device 15 is random
Close second valve 32 or the third valve 33；Second material position inside first storage tank 71 passes
92 duration T of sensorxWhen internal feedback monitoring information is " no material ", the control device 15 closes first valve at random
Door 31.
In other embodiments, the number of the storage tank can also be two, four or more, in preferred embodiment
It is to preferably illustrate purpose of design of the invention, the scope of the present invention is not by storage tank number only for three
It influences.
In other embodiments, the other positions of the storage tank can also be arranged in the weight sensing instrument 10, as long as can be with
Retaining amount in the storage tank is measured in real time, the position of the weight sensing instrument 10 does not influence the reality of purpose of design of the present invention
It is existing.
In other embodiments, first level sensor 91 and the third can be not provided in the storage tank
Level sensor 93, the throttle valve that can also be not provided on the discharge port 11.Although reducing the light to a certain extent
Cable feeding system does not influence the realization of whole design purpose of the present invention to the control ability of material stock in the storage tank.
In other embodiments, throttle valve can be set in the part storage tank corresponding discharge port 11, to rise
To part control ability.
In other embodiments, it can be not provided with second level sensor 92 in the storage tank, can not also set
The valve is set, although reducing the optical cable feeding system to a certain extent to the control energy of material stock in the storage tank
Power, but the realization of whole design purpose of the present invention is not influenced.
In other embodiments, valve can be set in the part storage tank corresponding position, to play part control energy
Power.
In other embodiments, the FtThe parameter setting formula met can also be simple blockiness definite value, i.e.,
In M0<Mt<M1When, Ft=Fx；In M2<Mt<M0When, Ft=FyDeng.Or other continuity formula, as long as in the storage tank
Middle retaining amount F when moretIt is smaller, design requirement of the invention can met to a certain degree.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of optical cable produces feeding system, comprising:
Several storage vats (13) being fed to optical cable production line (2)；
The storage tank being fed to the storage vat (13), the number of the storage tank are no less than two；
The warehouse (1) being fed to the storage tank；
The control device (15) that optical cable production feeding system is controlled；
It is characterized by: each storage tank is provided with the weight sensing instrument for measuring retaining amount inside the storage tank
(10), the weight sensing instrument (10) connect with the information input terminal of the control device (15)；The warehouse (1) passes through feed system
(5) it is fed to each storage tank, the feed system (5) and each gravitation tank link position are provided with individual stream
Valve is measured, each flow valve is controlled by the control device (15).
2. optical cable according to claim 1 produces feeding system, it is characterised in that: be respectively provided with inside each storage tank
First level sensor (91) and third level sensor (93), first level sensor (91) are set to the storing
Tank top, the third level sensor (93) are set to the storing pot bottom, first level sensor (91) and
The third level sensor (93) connect with the information input terminal of the control device (15)；Each storing pot bottom
It is provided with discharge port (11), is provided with throttle valve on each discharge port (11), each throttle valve is by the control
Device (15) control.
3. optical cable according to claim 2 produces feeding system, it is characterised in that: also set up inside each storage tank
Second level sensor (92), second level sensor (92) are set to the position that the storage tank presets retaining amount, institute
The second level sensor (92) is stated to connect with the information input terminal of the control device (15)；Each storage tank it is described go out
Material mouth (11) is fed by mutually independent conveying device to the storage vat (13), each conveying device and each described
Valve is provided between storage vat (13), each valve is controlled by the control device (15).
4. optical cable according to claim 3 produces feeding system, it is characterised in that: the conveying device, which is provided with, to be used for back
Receive unappropriated feed back channel (12), the feed back channel (12) and the warehouse (1) connection.
5. optical cable according to claim 1 to 4 produces feeding system, it is characterised in that: the number of the storage tank is
Three.
6. the method being fed using optical cable production feeding system described in claim 1, which is characterized in that including walking as follows
It is rapid:
Step a: when the optical cable production feeding system not running, maximum retaining amount M in the storage tank is measured1, default retaining amount
M0And minimum retaining amount M2；
Step b: start the optical cable production feeding system, each flow valve is with initial nominal flow F0It is fed；
Step c: each real-time retaining amount of storage tank is monitored by the weight sensing instrument (10), obtains each storage
The real-time retaining amount M of batch cant；
Step d: by each real-time retaining amount M of storage tanktIt is sent to the control device (15), the control device (15)
According to the real-time retaining amount MtNumerical value adjust the flow F of the flow valvet。
7. according to the method described in claim 6, it is characterized in that, the FtMeet following parameter setting: Ft=F0×(M1-
Mt)/(M1-M0), wherein M2<Mt<M1。
8. the method being fed using optical cable production feeding system as claimed in claim 2, it is characterised in that:
Minimum retaining amount M is less than when the third level sensor (93) monitors retaining amount in a certain storage tank2When, it opens
Dynamic step e: monitoring information is sent to the control device (15), the control device by the third level sensor (93)
(15) the corresponding throttle valve of the storage tank, duration T are closed1Afterwards, it is described to open this for the control device (15)
The corresponding throttle valve of storage tank；
It is more than maximum retaining amount M when first level sensor (91) monitors retaining amount in a certain storage tank1When, it opens
Dynamic step f: monitoring information is sent to the control device (15), the control device by first level sensor (91)
(15) the corresponding flow valve of the storage tank, duration T are closed2Afterwards, it is described to open this for the control device (15)
The corresponding flow valve of storage tank.
9. the method being fed using optical cable production feeding system as claimed in claim 3, which is characterized in that further include step
G: time T is presetx, monitoring information is sent to the control device (15) by second level sensor (92) in real time,
The monitoring information sent such as second level sensor (92) is " having material " and in setting time TxDo not change inside, then it is described
Control device (15) adjusts the valve, to increase feeding speed of the storage tank to the storage vat；Such as described second
The monitoring information that level sensor (92) is sent is " no material " and in setting time TxDo not change inside, then the control device
(15) valve is adjusted, to reduce feeding speed of the storage tank to the storage vat.
10. according to the method described in claim 6, it is characterized in that, the step g includes:
When the monitoring information that corresponding second level sensor (92) of a certain storage tank sends is " having material " and is setting
Set time TxWhen not changing inside, the control device (15) opens valve corresponding to the storage tank；As this institute
It states valve corresponding to storage tank to have opened, then the control device (15) is closed corresponding to remaining storage tank
Valve；
When the monitoring information that corresponding second level sensor (92) of a certain storage tank sends is " no material " and is setting
Set time TxWhen not changing inside, the control device (15) closes valve corresponding to the storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090422.5A CN109822860A (en) | 2019-01-30 | 2019-01-30 | A kind of optical cable production feeding system and method for feeding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090422.5A CN109822860A (en) | 2019-01-30 | 2019-01-30 | A kind of optical cable production feeding system and method for feeding |
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ID=66863049
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| WO2016177852A1 (en) * | 2015-05-06 | 2016-11-10 | Medimmune Limited | Retrofit devices for bioreactors |
| CN106113436A (en) * | 2016-08-10 | 2016-11-16 | 宏安集团有限公司 | The automatic feeding system that a kind of optical cable produces |
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2019
- 2019-01-30 CN CN201910090422.5A patent/CN109822860A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201974701U (en) * | 2011-01-29 | 2011-09-14 | 张俊英 | Electronic scale flow control system |
| CN103344301A (en) * | 2013-07-05 | 2013-10-09 | 杭州电子科技大学 | Powdery material level detection and control circuit |
| CN203612573U (en) * | 2013-11-11 | 2014-05-28 | 四川烟草工业有限责任公司 | Tobacco-material flow-controlling system |
| WO2016177852A1 (en) * | 2015-05-06 | 2016-11-10 | Medimmune Limited | Retrofit devices for bioreactors |
| CN106113436A (en) * | 2016-08-10 | 2016-11-16 | 宏安集团有限公司 | The automatic feeding system that a kind of optical cable produces |
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Application publication date: 20190531 |