CN111679697A - Liquid level control device - Google Patents
Liquid level control device Download PDFInfo
- Publication number
- CN111679697A CN111679697A CN202010537468.XA CN202010537468A CN111679697A CN 111679697 A CN111679697 A CN 111679697A CN 202010537468 A CN202010537468 A CN 202010537468A CN 111679697 A CN111679697 A CN 111679697A
- Authority
- CN
- China
- Prior art keywords
- liquid level
- level control
- water
- storage tank
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The invention relates to a liquid level control device, which comprises a bottom water storage tank, a top container fixed at the top end of the bottom water storage tank, a drainage pipeline connected between the bottom water storage tank and the top container and provided with a drainage valve, a water pump used for pumping liquid in the bottom water storage tank to the top container, a liquid level detection device used for detecting the liquid level in the top container, and a driving circuit electrically connected with the water pump. Through designing into the stock solution container reciprocal anchorage from top to bottom, drainage pipe, water pump, liquid level detection device and drive circuit all set up on the bottom aqua storage tank, have made things convenient for putting of liquid level control device to can reduce the utilization in horizontal space, be favorable to its using widely.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to process control devices, and more particularly to a fluid level control device.
[ background of the invention ]
In industrial process control systems, level control is an extremely common process control system. In order to facilitate students to understand and master learning contents deeply, various experimental devices are set up in colleges and universities, so that the students can really master and apply the learned knowledge by practice.
Referring to fig. 1, most of the existing liquid level control experimental devices are designed to be split multi-water-holding tanks, and are placed on a desktop or the ground to be debugged and used by students. The experimental device of this type has occupied great space, is difficult for settling to put, is unfavorable for using widely.
[ summary of the invention ]
The invention aims to provide a liquid level control device which occupies a small space.
In order to realize the purpose, the invention adopts the following technical scheme:
a liquid level control device comprises a top container and a bottom water storage tank which are vertically arranged along the height direction, a water drainage pipeline which is connected between the top container and the bottom water storage tank and is provided with a water drainage valve, a water pump which is used for pumping liquid in the bottom water storage tank to the top container, a liquid level detection device which is used for measuring the liquid level height in the top container, and a driving circuit which is electrically connected with the water pump.
Preferably, the bottom aqua storage tank includes cell body and detachably connects in the panel on cell body top, the top container includes inner tube and the outer tube that the inner tube and outer cover were put, the panel corresponds the inner tube is equipped with the intercommunicating pore, encircles the intercommunicating pore is equipped with the mounting groove, the inner tube passes through the intercommunicating pore with the cell body intercommunication, the outer tube insert arrange in the mounting groove and with the annular water tank is injectd to the inner tube.
Preferably, a measuring cavity communicated with the annular water tank is arranged on the panel, a measuring water channel is formed between the measuring cavity and the annular water tank, and the liquid level detection device is a pressure transmitter and is located at the measuring cavity and used for detecting the liquid level pressure in the annular water tank.
Preferably, a water supply waterway is further arranged on the panel and is connected with a water outlet of the water pump and the annular water tank; the measuring waterway and the water supply waterway are respectively arranged at two sides of the annular water tank.
Preferably, a water outlet communicated with a water drainage pipeline is formed in the panel, and the water outlet of the water drainage pipeline is higher than the measurement cavity.
Preferably, the height of the upper surface of the outer tube opposite to the panel is greater than that of the inner tube, and a sealing cover is covered at the top end of the outer tube.
Preferably, the inner tube is made of an opaque material, the outer tube is made of a transparent material, and the outer tube is provided with a scale corresponding to the liquid level in the height direction.
Preferably, the sealing cover is detachably connected with the outer pipe, so that the sealing cover can be opened to inject liquid into the bottom water storage tank when the liquid level control device is used for the first time.
Preferably, the liquid capacity of the bottom water storage tank is larger than that of the annular water tank.
Preferably, the water pump is a direct-current water pump; the drive circuit is provided with a PWM input end and an analog input end, and comprises a power drive module and a selector switch which are connected with each other, wherein the PWM input end is used for accessing a PWM control signal, the analog input end is used for accessing an analog control signal, the power drive module is connected to the water pump, and the selector switch is connected to the PWM input end and the analog input end in a switchable manner.
Compared with the prior art, the invention has the following advantages:
1. in the liquid level control device, the top container and the bottom water storage tank are discharged according to the up-down spatial relationship, and the water pump, the liquid level detection device, the drainage pipeline and the driving circuit are all arranged on the bottom water storage tank, so that the occupation of horizontal space can be reduced, the liquid level control device is convenient to arrange, and the popularization and the use of the liquid level control device are facilitated.
2. In the liquid level control device, the design of the annular water tank with the outer pipe and the inner pipe sleeved inside and outside is adopted, the sectional area of the annular water tank is small, compared with a container of the existing liquid level control device, the liquid volume with the same height is smaller, the volume of a water storage tank at the bottom can be effectively reduced, and the space is further reduced. In a similar way, because the sectional area of the annular water tank is very small, the liquid with the same volume can be measured to obtain a higher liquid level through the annular water tank, so that the effective range is increased, and the experimental data range is effectively enlarged while the volume of the experimental equipment is not increased.
3. In the liquid level control device, the water supply waterway and the measuring waterway are respectively arranged at two sides of the annular water tank, so that the bottom inlet water flow slowly increases the measuring liquid level under the annular guide flow, and unnecessary pressure disturbance of the measuring cavity is not caused.
4. In the liquid level control device, the water outlet is arranged higher than the measurement cavity, so that the measurement cavity is always soaked below the liquid level in the use process of the liquid level control device, and the influence on the accuracy of a measurement result caused by the air in the measurement cavity is avoided.
5. The liquid level control device of the invention can control the control mode of the water pump to be PWM control or analog quantity control by selecting the direct-current water pump and independently designing the drive circuit and switching the selection switch, thereby changing the prior single control method, realizing free switching of PWM control or analog quantity control of the water pump without additionally adding a frequency converter or an electric control valve and the like, saving the expenditure and ensuring more diversified control.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a conventional liquid level control device.
Fig. 2 is a schematic perspective view of a liquid level control device according to an embodiment of the present invention.
FIG. 3 is a schematic view of the fluid level control apparatus of FIG. 2 without the sealing cap and the driving circuit.
Fig. 4 is a schematic structural diagram of a panel according to an embodiment of the present invention.
FIG. 5 is a control schematic block diagram of a fluid level control apparatus according to an embodiment of the present invention.
[ detailed description ] embodiments
The present invention is further described with reference to the drawings and the exemplary embodiments, wherein like reference numerals are used to refer to like elements throughout. In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted.
Referring to fig. 2 to 5, the present invention relates to a liquid level control device 100, which is suitable for use in experimental teaching to facilitate students to deepen understanding and mastering of theoretical knowledge through experimental practice. The liquid level control device 100 adopts an integrated structure, and the containers for storing liquid are arranged vertically in the height direction, so that the occupation of horizontal space can be reduced, and the arrangement is convenient.
The liquid level control device 100 comprises a bottom water storage tank 10, a top container 20, a drainage pipeline 30, a water pump 40, a pressure transmitter 50 and a driving circuit 60 which are all arranged on the bottom water storage tank 10, the top container 20 is fixed above the bottom water storage tank 10, the water pump 40 and the drain line 30 are both connected between the bottom water storage tank 10 and the top container 20, wherein the water pump 40 is used for pumping the liquid in the bottom water storage tank 10 to the top container 20, the drainage pipeline 30 is used for draining the liquid in the top container 20 to the bottom water storage tank 10, so as to realize the flow of the liquid between the two containers, the pressure transducer 50 is used to detect the level of the liquid in the top container 20, the driving circuit 60 is electrically connected to the water pump 40, thereby adjusting the level of liquid in the top vessel 20 and obtaining level pressure change data via the pressure transmitter 50.
In the present embodiment, the liquid level height change of the top container 20 is detected by the pressure change of the pressure transmitter 50. In other embodiments, the pressure transmitter 50 may be replaced with other liquid level detection devices, such as a liquid level sensor, which directly converts the pressure into the liquid level height, to obtain the liquid level variation data of the top container 20.
Preferably, the bottom water storage tank 10 comprises a tank body 101 and a panel 102 detachably covering the top end of the tank body 101, and the two can be fastened to each other by means of a snap or a threaded connection.
The top container 20 comprises an outer pipe 201 and an inner pipe 202 which are concentrically arranged, and an annular water tank 203 is formed between the outer pipe 201 and the inner pipe 202. Referring to fig. 4, the panel 102 is provided with a communication hole 1021 at a position corresponding to the inner pipe 202, and the communication hole 1021 penetrates both surfaces of the panel to communicate the inner space of the inner pipe 202 with the tank 101. The panel 102 is further provided with a mounting groove surrounding the communication hole 1021, the outer pipe 201 is inserted into the mounting groove, the annular water tank 203 is defined by the outer pipe 202, and the annular water tank 203 and the inner space of the inner pipe 202 are isolated from each other. In a preferred embodiment, the thickness of the panel 102 is 20mm and the depth of the mounting groove is 15 mm.
The height of the outer pipe 201 relative to the surface of the panel 102 is larger than that of the inner pipe 202, the top end of the outer pipe 201 is provided with a sealing cover 204 detachably connected with the outer pipe, the top end of the inner pipe 202 is provided with an overflow plate (not marked) with meshes, so that liquid in the annular water tank 203 can overflow from the top end of the inner pipe 202 back to the bottom water storage tank 10 through the meshes of the overflow plate after being full, and various problems caused by overlarge pressure due to the fact that the water pump 40 continues to pump water after the annular water tank 203 is full of liquid are avoided.
In the invention, by adopting the design of the annular water tank 203 with the outer pipe 201 and the inner pipe 202 sleeved inside and outside, the sectional area of the annular water tank 203 is small, compared with the container of the existing liquid level control device, the liquid volume at the same height is smaller, the volume of the bottom water storage tank 10 can be effectively reduced, and the space is reduced. Similarly, because the sectional area of the annular water tank 203 is small, the liquid with the same volume can be measured to obtain a higher liquid level through the annular water tank, so that the effective range is increased, and the experimental data range is effectively enlarged while the volume of the experimental equipment is not increased.
The inner pipe 202 is made of opaque materials, the outer pipe 201 is made of transparent materials, scale values corresponding to the liquid level height are arranged on the outer pipe 201 along the length direction of the outer pipe, so that dyeing liquid can be injected to observe the change of the liquid level when the pressure transmitter is used, the on-site real liquid level can be conveniently read, the on-site real liquid level can be compared with the liquid level value detected by the pressure transmitter, and the contrast of the water level can be improved by using the dyeing liquid.
The bottom of the outer pipe 201 is provided with a water supply hole (not marked, the same below), a drain hole (not marked, the same below) and a measuring hole which are all communicated with the annular water tank 203 so as to be correspondingly connected with the water pump 40, the drain pipeline 30 and the pressure transmitter 50, and the functions of pump water supply, top container 20 drainage and liquid level measurement are completed.
The faceplate 102 defines a pump inlet 1023, a pump outlet 1024, a measurement cavity 1022, and a drain. The pump outlet 1024 is a blind hole extending from the upper surface to the lower surface of the panel 102, and is communicated with the water supply hole of the outer tube 201, and a water supply path is formed among the pump inlet 1023, the water pump 40, the pump outlet 1024 and the water supply hole. The measuring cavity 1022 is also a blind hole, which is communicated with the measuring hole and forms a measuring waterway, and the pressure probe of the pressure transmitter 50 is placed in the measuring cavity to obtain the liquid level in the annular water tank 203 by detecting the liquid pressure in the measuring cavity. The water outlet and the water discharging hole are connected through a pipeline to form a water discharging pipeline 30, and a valve is arranged on the water discharging pipeline 30. The pump inlet 1023 and the water outlet are through holes, so that the water inlet of the water pump 40 is in butt joint with the pump inlet on the panel, the water discharge pipeline 30 is communicated with the tank body 101, and liquid flows between the annular water tank 203 and the bottom water storage tank 10.
In order to minimize the liquid capacity and control the whole weight, the width of the annular water tank 203 is designed to be 15mm, and the liquid capacity of the bottom water storage tank 10 is only slightly larger than that of the annular water tank 203 according to the liquid level calculation of 400mm height.
Preferably, the connection between the water supply channel and the measuring channel and the outer pipe 201, that is, the water supply hole and the measuring hole, are respectively disposed at two sides of the annular water tank, so that the bottom inlet water flow slowly increases the measuring liquid level under the annular guide flow, thereby avoiding unnecessary pressure disturbance of the measuring chamber.
Preferably, the drainage port is located higher than the measurement cavity 1022, so that the measurement cavity 1022 is always submerged when the fluid level control apparatus 100 is in use, thereby preventing air from entering and affecting the lateral measurement accuracy.
Preferably, the water pump 40 is a direct-current water pump 40; the driving circuit 60 is provided with a PWM input terminal and an analog input terminal, and the driving circuit 60 includes a power driving module 601 and a selection switch 602 which are connected with each other, the PWM input terminal is used for accessing a PWM control signal, the analog input terminal is used for accessing an analog control signal, the power driving module 601 is connected to the water pump 40, and the selection switch 602 is connected to the PWM input terminal and the analog input terminal in a switchable manner.
Therefore, the control mode of the water pump 40 can be controlled by switching the selector switch to be PWM control or analog quantity control, so that the existing single control method is changed by the independently designed drive circuit 60, the free switching of the water pump 40 between the PWM control or the analog quantity control is realized, an additional frequency converter or an electric control valve is not needed, the expenditure is saved, and the control is more diversified. The selection switch can be a single-pole double-throw switch, the fixed end of the selection switch is connected to the power driving module, and the movable end of the selection switch is connected with the analog input end and the PWM input end in a switchable mode.
The panel 102 is provided with a bracket 70, the bracket 70 is arranged on one side of the outer pipe 201, and the top end of the bracket 70 is provided with a mounting plate. The drive circuit 60 is fixed to the mounting plate and located below the mounting plate, the water pump 40 is located in the bracket, and the pressure transmitter is located on one side of the bracket, thereby making full use of the space above the panel.
In summary, the liquid level control apparatus 100 of the present invention can reduce the occupation of horizontal space and facilitate the placement thereof by fixing the top container 20, the drain line 30, the water pump 40, etc. above the bottom water storage tank 10. In addition, the bottom water storage tank 10 and the top container 20 are both closed spaces, and the experiment is carried out by using dyed distilled water, so that moss is prevented from growing, and the cleaning-free effect can be realized.
Although a few exemplary embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (10)
1. The liquid level control device is characterized by comprising a bottom water storage tank, a top container fixed at the top end of the bottom water storage tank, a water drainage pipeline connected between the bottom water storage tank and the top container and provided with a water drainage valve, a water pump used for pumping liquid in the bottom water storage tank to the top container, a liquid level detection device used for detecting the liquid level in the top container, and a driving circuit electrically connected with the water pump.
2. The liquid level control device as claimed in claim 1, wherein the bottom water storage tank comprises a tank body and a panel detachably connected to the top end of the tank body, the top container comprises an inner pipe and an outer pipe which are sleeved with each other, the panel is provided with a communication hole corresponding to the inner pipe and is provided with a mounting groove surrounding the communication hole, the inner pipe is communicated with the tank body through the communication hole, and the outer pipe is inserted into the mounting groove and defines an annular water tank with the inner pipe.
3. The liquid level control device as claimed in claim 2, wherein the panel is provided with a measuring chamber communicating with the annular water tank, a measuring waterway is formed between the measuring chamber and the annular water tank, and the liquid level detecting device is a pressure transmitter which is located at the measuring chamber and is used for detecting the liquid level pressure in the annular water tank.
4. The liquid level control device of claim 3, wherein the panel is further provided with a water supply waterway which is connected with a water outlet of the water pump and the annular water tank; the measuring waterway and the water supply waterway are respectively arranged at two sides of the annular water tank.
5. The fluid level control apparatus of claim 3, wherein the faceplate defines a drain opening in communication with a drain line, the drain opening of the drain line being higher than the measurement chamber.
6. The fluid level control apparatus as claimed in claim 2, wherein the outer tube has a height greater than that of the upper surface of the panel and covers the top end of the inner tube with a sealing cap.
7. The fluid level control apparatus of claim 6, wherein the seal cap is removably coupled to the outer tube.
8. The liquid level control apparatus according to claim 2, wherein the inner tube is made of an opaque material, the outer tube is made of a transparent material, and the outer tube is provided with a scale corresponding to the height of the liquid level in the height direction.
9. The fluid level control apparatus of claim 2, wherein the liquid capacity of the bottom reservoir is greater than the liquid capacity of the toroidal tank.
10. The fluid level control apparatus of claim 1, wherein the water pump is a direct current water pump; the drive circuit is provided with a PWM input end and an analog input end, and comprises a power drive module and a selector switch which are connected with each other, wherein the PWM input end is used for accessing a PWM control signal, the analog input end is used for accessing an analog control signal, the power drive module is connected to the water pump, and the selector switch is connected to the PWM input end and the analog input end in a switchable manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537468.XA CN111679697B (en) | 2020-06-12 | 2020-06-12 | Liquid level control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537468.XA CN111679697B (en) | 2020-06-12 | 2020-06-12 | Liquid level control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111679697A true CN111679697A (en) | 2020-09-18 |
| CN111679697B CN111679697B (en) | 2023-05-26 |
Family
ID=72454967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010537468.XA Active CN111679697B (en) | 2020-06-12 | 2020-06-12 | Liquid level control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111679697B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589648A (en) * | 2012-03-15 | 2012-07-18 | 济南中森机械制造有限公司 | LNG (liquefied natural gas) liquid level gauge and method for measuring liquid level |
| CN203167332U (en) * | 2012-10-09 | 2013-08-28 | 惠州学院 | Visual self-adaptive light adjustable energy-saving LED lamp |
| CN204115998U (en) * | 2014-11-19 | 2015-01-21 | 中华人民共和国顺德出入境检验检疫局 | The multi-functional test device for air tightness of a kind of gas utensil |
| CN104787912A (en) * | 2015-03-28 | 2015-07-22 | 江苏创进泵阀制造有限公司 | Fresh water desalting device |
| CN106404104A (en) * | 2016-06-24 | 2017-02-15 | 钦州学院 | High-precision liquid level detection device |
| CN107393374A (en) * | 2016-05-14 | 2017-11-24 | 哈尔滨工业大学 | Suitable for the self-loopa open channel weir flow experimental provision of experimental teaching |
| CN107450396A (en) * | 2017-08-16 | 2017-12-08 | 大连海事大学 | A kind of autonomous navigation of unmanned boat and remote control navigation switching control module |
| CN107819414A (en) * | 2017-12-06 | 2018-03-20 | 湖州灵感电子科技有限公司 | A kind of voltage-controlled system of deep sea environment simulation device |
| CN109323844A (en) * | 2018-09-30 | 2019-02-12 | 河海大学 | The annular water tank device of density stratification water body in a kind of simulation shear flow |
| CN210570893U (en) * | 2019-10-11 | 2020-05-19 | 南京倍格电子科技有限公司 | Liquid level flow monitor |
-
2020
- 2020-06-12 CN CN202010537468.XA patent/CN111679697B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589648A (en) * | 2012-03-15 | 2012-07-18 | 济南中森机械制造有限公司 | LNG (liquefied natural gas) liquid level gauge and method for measuring liquid level |
| CN203167332U (en) * | 2012-10-09 | 2013-08-28 | 惠州学院 | Visual self-adaptive light adjustable energy-saving LED lamp |
| CN204115998U (en) * | 2014-11-19 | 2015-01-21 | 中华人民共和国顺德出入境检验检疫局 | The multi-functional test device for air tightness of a kind of gas utensil |
| CN104787912A (en) * | 2015-03-28 | 2015-07-22 | 江苏创进泵阀制造有限公司 | Fresh water desalting device |
| CN107393374A (en) * | 2016-05-14 | 2017-11-24 | 哈尔滨工业大学 | Suitable for the self-loopa open channel weir flow experimental provision of experimental teaching |
| CN106404104A (en) * | 2016-06-24 | 2017-02-15 | 钦州学院 | High-precision liquid level detection device |
| CN107450396A (en) * | 2017-08-16 | 2017-12-08 | 大连海事大学 | A kind of autonomous navigation of unmanned boat and remote control navigation switching control module |
| CN107819414A (en) * | 2017-12-06 | 2018-03-20 | 湖州灵感电子科技有限公司 | A kind of voltage-controlled system of deep sea environment simulation device |
| CN109323844A (en) * | 2018-09-30 | 2019-02-12 | 河海大学 | The annular water tank device of density stratification water body in a kind of simulation shear flow |
| CN210570893U (en) * | 2019-10-11 | 2020-05-19 | 南京倍格电子科技有限公司 | Liquid level flow monitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111679697B (en) | 2023-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11808678B2 (en) | System for deep-sea planktonic microorganism in-situ concentration, temperature maintaining and pressure maintaining sampling | |
| CN111679697A (en) | Liquid level control device | |
| CN217360324U (en) | Coding board | |
| CN210719232U (en) | Biosensor performance detection device | |
| CN210654336U (en) | Chemical liquid storage barrel | |
| CN219915078U (en) | Slide staining device | |
| CN214277181U (en) | Accurate weighing device of liquid | |
| SU1154578A1 (en) | Apparatus for sampling bottom layer of water | |
| CN217244166U (en) | Calibration system of surface-mounted liquid level sensor and floor washing machine with same | |
| CN111122827A (en) | Test device for accurately controlling underground water burial depth | |
| CN111077056B (en) | Outflow collecting device capable of applying back pressure | |
| CN213446194U (en) | Laboratory is with constant temperature and pressure dropping funnel | |
| CN220207581U (en) | Underground water field index detection device | |
| CN219915462U (en) | Bioelectrochemistry test bed | |
| CN220251146U (en) | PH meter electrode protection liquid automatic liquid supplementing device | |
| CN211757226U (en) | Automatic film washing device | |
| CN213067866U (en) | Water quantity weighing device | |
| CN220423737U (en) | Direct drinking machine with water shortage detection device | |
| CN210487343U (en) | Coal slime water quality sampler | |
| CN219008800U (en) | Waste liquid collecting barrel for analysis laboratory | |
| CN216847386U (en) | Permeable pavement brick water permeability coefficient test device | |
| CN203025145U (en) | Detection pool system for interface electrochemical reaction | |
| CN219142802U (en) | Water quality monitoring device | |
| CN212378860U (en) | Liquid level meter for closed oil depot | |
| CN213787262U (en) | Gas collection box, pneumatic liquid level detection device and dish washing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |