CN207264791U - A kind of dual measuring device of liquid level - Google Patents
A kind of dual measuring device of liquid level Download PDFInfo
- Publication number
- CN207264791U CN207264791U CN201721113706.4U CN201721113706U CN207264791U CN 207264791 U CN207264791 U CN 207264791U CN 201721113706 U CN201721113706 U CN 201721113706U CN 207264791 U CN207264791 U CN 207264791U
- Authority
- CN
- China
- Prior art keywords
- liquid level
- blind plate
- probe
- heavy water
- level
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The utility model belongs to nuclear power station heavy water and stows refuelling system technical field, and in particular to a kind of dual measuring device of liquid level, it is therefore intended that develops a set of dual level monitoring system, original a set of reservation, is in addition further added by a set of level monitoring system redundancy.Ensure that heavy water will not overflow, cause staff to be subject to risk and the workshop pollution of unexpected dose irradiation.Effectively protection staff and environment.It is characterized in that：It includes heavy water catch tank, level probe component, back with water inlet line, exhaust outlet, binding post, blind plate, fluid level transmitter, liquid level alarm, pressure transmitter, liquid level display, the first shutoff valve, the second shutoff valve, draining pump and flowing line.Dual liquid level emasuring device described in the utility model, securely and reliably, easy to use, stability is strong, high financial profit, it is ensured that heavy water will not overflow, and cause staff to be subject to risk and the workshop pollution of unexpected dose irradiation, effectively protect staff and environment.
Description
Technical field
The utility model belongs to nuclear power station heavy water and stows refuelling system technical field, and in particular to a kind of dual measurement of liquid level
Device.
Background technology
The Liquid level of heavy water catch tank 35230-TK3 is configured with a level detection component for having 5 probes, passes through liquid
Position transmitter provides following 4 liquid level signals：Superelevation；Height control；Low control；It is ultralow.Under normal automatic condition, cistern water level is increased to
During high draining position, the heavy water collecting pump P3 of water tank bottom outlet starts, heavy water collecting pump when cistern water level is reduced to low draining position
P3 stops transport.In addition, ultralow liquid level provides an interlocking, cistern water level forbids heavy water to collect pump startup when ultralow following.It is actual
Found in debugging and operational process, due to the unstability of circuit and probe assembly in itself, superelevation, height control, low, ultralow liquid level control
System can fail once in a while.Once occurred during operation due to liquid level water tank in high liquid level in time trigger termination of pumping interlocking signal and
The event for causing heavy water to be overflowed from the exhaust outlet of water tank.The imperfection of original design mainly includes two aspects：1st, visited with liquid level
The liquid level of water tank is protected from environmental larger measuring for pin ON/OFF amount, the conductivity of medium, and the contact resistance and liquid level of probe become
Send the sensitivity of device, simultaneously because level probe is installed on same flange, and be uniformly distributed, due to the spacing of probe and probe
From relatively closely, condensation droplet can be produced between probe sometimes, causes probe to be connected, so will result in logical mistake, the alarm is not
Alarm, should not alarm to alarm, and between this case, we take is contracted with import heat-shrinkable T bush in the root of probe,
It accordingly even when there is condensation droplet, will not tie logical between probe, but other reasons still can not change, and influence whether final liquid
The control of position, control accuracy is poor, causes heavy water to leak；2nd, babinet is without liquid level indicated work energy, remote-operated dish platform behaviour of reloading
Specific liquid level in water tank can not be known by making personnel.To improve the reliability of high water tank control system, it is necessary to newly-increased a set of only
Vertical, the level monitoring and warning device of redundancy.New design alteration needs to meet following require：
1st, the level detection equipment newly increased need to be capable of providing an analog signals, and configure a finger in master control dish platform
Show instrument, can constantly monitor the liquid level of heavy water catch tank online easy to operator.
2nd, the level detection equipment newly increased need to be capable of providing superelevation and ultralow two digital signals, and superelevation signal introduces weight
In the start and stop loop of water collecting pump, ultralow signal provides an alarm, to increase the reliability of Liquid level loop.
Utility model content
The purpose of this utility model is that developing a set of dual level monitoring system, original a set of reservation, is in addition further added by
A set of level monitoring system redundancy.Ensure that heavy water will not overflow, cause staff to be subject to risk and the factory of unexpected dose irradiation
Pollute in room.Effectively protection staff and environment.
The utility model is realized in this way：
A kind of dual measuring device of liquid level, including heavy water catch tank, level probe component, back with water inlet line, exhaust outlet, wiring
Column, blind plate, fluid level transmitter, liquid level alarm, pressure transmitter, liquid level display, the first shutoff valve, the second shut-off valve
Door, draining pump and flowing line；Blind plate is installed on the upper end of heavy water catch tank, for fixing liquid level probe assembly；Level probe
Component is installed on blind plate, and lower end is stretched into inside heavy water catch tank through blind plate；Back with water inlet line and exhaust outlet are arranged on blind plate
Side；Binding post is fixed on the upper end of level probe component, for installing cable；One end of fluid level transmitter passes through cable
It is connected with binding post, the other end is connected by cable with liquid level alarm, for transmitting liquid level signal and controlling draining pump
Opening and closing；One end of first shutoff valve is connected by one end of the discharge outlet and the second shutoff valve of pipeline and heavy water catch tank respectively
Connect, the other end is connected by pipeline with pressure transmitter；Pressure transmitter is connected by cable with liquid level display, for defeated
Go out the liquid level signal of heavy water catch tank to liquid level display；One end that the other end of second shutoff valve passes through pipeline and draining pump
Connection；The other end of draining pump is connected with flowing line.
Heavy water catch tank generally tubbiness as described above, is equipped with through hole, in the upper of through hole in the center of upper surface
End is provided with outer circular edge, multiple blind plate mounting holes is distributed along the circumference with outer rim, for fixing blind plate；In heavy water catch tank
Lower end be provided with discharge outlet, for discharging heavy water.
Blind plate generally circular plate-like shape as described above, is distributed along the circumference with multiple probe mounting holes on the inside of upper surface,
For fixing liquid level probe assembly；Multiple mounting holes are distributed along the circumference with the outside of probe mounting hole, it is blind with heavy water catch tank
Plate mounting hole is corresponding, for fixing blind plate.
The probe mounting hole as described above is more than or equal to five.
Level probe component as described above includes magnetic connector, fastening screw nut and level probe；Level probe passes through simultaneously tight
Nut is fixed on the lower end of magnetic connector；Binding post is fixed on the upper end of magnetic connector；Magnetic connector passes through the probe mounting hole on blind plate,
It is fixed on by clamp nut on blind plate.
Magnetic connector outer surface as described above is formed for magnetic with blind plate insulate, and inside is conductive material；Conductive material it is upper
End is fixedly connected with binding post, and lower end is provided with female hole, is fixedly connected with level probe.
The top of level probe as described above is provided with external screw thread, for connecting magnetic connector and fastening screw nut；Liquid level is visited
Pin is divided into common probe, ultralow level probe, low liquid level probe, high liquid level probe, superelevation level probe, and length is reduced successively；
Level probe component shares five, installs five kinds of different level probes respectively.
Heavy water catch tank, level probe component and blind plate as described above are made of 304 stainless steels；Back with water inlet line and
Flowing line and pipeline are made of nuclear grade stainless steel steel pipe.
The utility model further includes sealing ring；Ring set is on magnetic connector, between clamp nut and blind plate, uses
In realizing the sealing between level probe component and blind plate.
The utility model further includes blind plate fastening bolt；Blind plate fastening bolt is installed on the mounting hole of blind plate and heavy water is collected
In the blind plate mounting hole of case, for fixing blind plate and heavy water catch tank.
The beneficial effects of the utility model are：
Dual liquid level emasuring device described in the utility model, securely and reliably, easy to use, stability is strong, economy effect
It is beneficial high, it is ensured that heavy water will not overflow, and cause staff to be subject to risk and the workshop pollution of unexpected dose irradiation, effectively protect work
Make personnel and environment.Meet that heavy water reactor fuel handling system 3523-TK3 level monitorings are had suffered use and had suffered the phase in longevity, wound is domestic and international
Identical power station level gauging similar devices advanced level.By running in recent years, superelevation, high, medium and low, ultralow liquid level can be shown
Stick figure, and different liquid level audible alarms is sent, so far without a heavy water spilling event occurs, play good monitoring
Effect.
Brief description of the drawings
Fig. 1 is a kind of structure principle chart of the dual measuring device of liquid level of the utility model；
Fig. 2 is a kind of top view of the blind plate of the dual measuring device of liquid level of the utility model；
Fig. 3 is a kind of level probe component of the dual measuring device of liquid level and the connection signal of blind plate of the utility model
Figure；
Fig. 4 is a kind of structure diagram of the level probe component of the dual measuring device of liquid level of the utility model.
Wherein：1. heavy water catch tank, 2. level probe components, 3. back with water inlet line, 4. exhaust outlets, 5. binding posts, 6. blind plates,
7. fluid level transmitter, 8. liquid level alarms, 9. pressure transmitters, 10. liquid level displays, 11. first shutoff valves, 12. second
Shutoff valve, 13. draining pumps, 14. flowing lines, 15. sealing rings, 16. blind plate fastening bolts, 17. magnetic connectors, 18. and tight spiral shell
Mother, 19. level probes.
Embodiment
The utility model is described further with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of dual measuring device of liquid level, including heavy water catch tank 1, level probe component 2, back with water inlet line
3rd, exhaust outlet 4, binding post 5, blind plate 6, fluid level transmitter 7, liquid level alarm 8, pressure transmitter 9, liquid level display 10, first
Shutoff valve 11, the second shutoff valve 12, draining pump 13 and flowing line 14.Blind plate 6 is installed on the upper end of heavy water catch tank 1,
For fixing liquid level probe assembly 2.Level probe component 2 is installed on blind plate 6, and heavy water catch tank 1 is stretched into lower end through blind plate 6
It is internal.Back with water inlet line 3 and exhaust outlet 4 are arranged on the side of blind plate 6.Binding post 5 is fixed on the upper end of level probe component 2, uses
In installation cable.One end of fluid level transmitter 7 is connected by cable with binding post 5, and the other end passes through cable and liquid level
Alarm 8 connects, for transmitting liquid level signal and controlling the opening and closing of draining pump 13.One end of first shutoff valve 11 passes through respectively
Pipeline is connected with the discharge outlet of heavy water catch tank 1 and one end of the second shutoff valve 12, and the other end passes through pipeline and pressure inverting
Device 9 connects.Pressure transmitter 9 is connected by cable with liquid level display 10, for exporting the liquid level signal of heavy water catch tank 1
To liquid level display 10.The other end of second shutoff valve 12 is connected by pipeline with one end of draining pump 13.Draining pump 13
The other end is connected with flowing line 14.
The generally tubbiness of heavy water catch tank 1, is equipped with through hole in the center of upper surface, the upper end of through hole is provided with ring
Shape outer rim, is distributed along the circumference with multiple blind plate mounting holes, for fixing blind plate 6 in outer rim.Set in the lower end of heavy water catch tank 1
Discharge outlet is equipped with, for discharging heavy water.
As shown in Fig. 2, the generally circular plate-like shape of blind plate 6, is distributed along the circumference with multiple probe mounting holes on the inside of upper surface,
For fixing liquid level probe assembly 2.Multiple mounting holes are distributed along the circumference with the outside of probe mounting hole, with heavy water catch tank 1
Blind plate mounting hole is corresponding, for fixing blind plate 6.
In the present embodiment, the probe mounting hole is more than or equal to five.
As shown in Figure 3 and Figure 4, level probe component 2 includes magnetic connector 17, fastening screw nut 18 and level probe 19.Liquid level
Probe 19 is fixed on the lower end of magnetic connector 17 by fastening screw nut 18.Binding post 5 is fixed on the upper end of magnetic connector 17.Magnetic connector 17
Through the probe mounting hole on blind plate 6, it is fixed on by clamp nut on blind plate 6.
17 outer surface of magnetic connector is formed for magnetic with blind plate 6 insulate, and inside is conductive material.The upper end of conductive material and wiring
Column 5 is fixedly connected, and lower end is provided with female hole, is fixedly connected with level probe 19.
In the present embodiment, the top of level probe 19 is provided with external screw thread, for connecting magnetic connector 17 and fastening screw nut
18.Level probe 19 divides for common probe, ultralow level probe, low liquid level probe, high liquid level probe, superelevation level probe, length
Degree is reduced successively.Level probe component 2 shares five, installs five kinds of different level probes 19 respectively.
In the present embodiment, heavy water catch tank 1, level probe component 2 and blind plate 6 are made of 304 stainless steels；Water inlet
Pipeline 3 and flowing line 14 and pipeline are made of nuclear grade stainless steel steel pipe.
Preferably, the utility model further includes sealing ring 15.Sealing ring 15 is sleeved on magnetic connector 17, positioned at clamp nut
Between blind plate 6, the sealing that is used for realization between level probe component 2 and blind plate 6.
Preferably, the utility model further includes blind plate fastening bolt 16.Blind plate fastening bolt 16 is installed on the installation of blind plate 6
In the blind plate mounting hole of hole and heavy water catch tank 1, for fixing blind plate 6 and heavy water catch tank 1.
The operation principle of the utility model is as follows：
1. start draining pump 13, until heavy water catch tank 1 empties.
2. fluid level transmitter 7 and liquid level alarm 8 are connected into direct current.
3. opening power supply, heavy water is injected into heavy water catch tank 1 by back with water inlet line 3.When to ultralow liquid level, heavy water overflows across
When common probe and ultralow level probe, due to heavy water electric conductivity, between form resistance, signal is transmitted by liquid level by cable
Transmitter 7, fluid level transmitter 7 outputs signal to liquid level alarm 8 by turning, and has lamplight pointing, and ultralow liquid level lamp is bright at this time.
Liquid level display 10 shows pressure value, this pressure value is set, liquid level display 10 forms ultralow liquid level stick figure.
4. continue to 1 water filling of heavy water catch tank, when water overflows across common probe with low liquid level probe, output low liquid level letter
Number, liquid level display 10 shows pressure value, this pressure is set, and liquid level display 10 forms low liquid level stick figure.
5. continue to 1 water filling of heavy water catch tank, when water overflows across common probe with high liquid level probe, output high liquid level letter
Number, liquid level display 10 shows pressure value, this pressure is set, and liquid level display 10 forms high liquid level stick figure.
6. continuing to 1 water filling of heavy water catch tank, when water overflows across common probe with superelevation level probe, superelevation liquid level is exported
Signal, liquid level display 10 show pressure value, this pressure are set that liquid level display 10 forms superelevation liquid level stick figure.
7. after the completion of ultralow more than, low, high, superelevation level set, draining pump 13 is manually booted, heavy-water tank heavy water is drained into
The ultralow liquid level liquid level lamp of liquid level alarm 8 is bright.
8. heavy water is injected heavy water catch tank from back with water inlet line 3, when reaching low liquid level, 8 light of liquid level alarm is shown
Low liquid level, 10 stick figure of liquid level display show low liquid level and have sound prompting.
9. when heavy water catch tank water level reaches high liquid level, liquid level alarm 8 exports high liquid level lamplight pointing, and liquid level is shown
10 stick figure of device is shown, while fluid level transmitter 7 outputs signal to draining pump 13 and starts draining pump.When 1 water of heavy water catch tank is arranged
During to low liquid level, fluid level transmitter 7 outputs signal to 13 controller termination of pumping of draining pump.
Above by a large number of experiments verification experimental verification, all functions all meet design function, binding post 5, blind plate 6, liquid level
Transmitter 7, liquid level alarm 8 and 11 liang of pressure transmitter 9, liquid level display 10, the first shutoff valve set level monitoring systems
Single equipment failure is effectively prevent, operating personnel is effectively reminded, prevents heavy water from overflowing.
The implementation of the utility model is explained in detail above in conjunction with embodiment, but the utility model and unlimited
In above-described embodiment, within the knowledge of a person skilled in the art, the utility model can also not departed from
Various changes can be made on the premise of objective.The content not being described in detail in the utility model specification can use existing skill
Art.
Claims (10)
- A kind of 1. dual measuring device of liquid level, it is characterised in that：It include heavy water catch tank (1), level probe component (2), into Water pipeline (3), exhaust outlet (4), binding post (5), blind plate (6), fluid level transmitter (7), liquid level alarm (8), pressure transmitter (9), liquid level display (10), the first shutoff valve (11), the second shutoff valve (12), draining pump (13) and flowing line (14)；Blind plate (6) is installed on the upper end of heavy water catch tank (1)；Level probe component (2) is installed on blind plate (6), and lower end passes through It is internal that blind plate (6) stretches into heavy water catch tank (1)；Back with water inlet line (3) and exhaust outlet (4) are arranged on the side of blind plate (6)；Binding post (5) it is fixed on the upper end of level probe component (2)；One end of fluid level transmitter (7) is connected by cable with binding post (5), The other end is connected by cable with liquid level alarm (8)；One end of first shutoff valve (11) passes through pipeline and heavy water respectively The discharge outlet of collecting box (1) is connected with one end of the second shutoff valve (12), and the other end is connected by pipeline and pressure transmitter (9) Connect；Pressure transmitter (9) is connected by cable with liquid level display (10)；The other end of second shutoff valve (12) passes through pipe Road is connected with the one end of draining pump (13)；The other end of draining pump (13) is connected with flowing line (14).
- A kind of 2. dual measuring device of liquid level according to claim 1, it is characterised in that：The heavy water catch tank (1) Generally tubbiness, is equipped with through hole in the center of upper surface, the upper end of through hole is provided with outer circular edge, along week in outer rim To being evenly equipped with multiple blind plate mounting holes；The lower end of heavy water catch tank (1) is provided with discharge outlet.
- A kind of 3. dual measuring device of liquid level according to claim 2, it is characterised in that：The blind plate (6) is generally Circular plate-like shape, is distributed along the circumference with multiple probe mounting holes on the inside of upper surface；It is distributed along the circumference with the outside of probe mounting hole Multiple mounting holes, it is corresponding with the blind plate mounting hole of heavy water catch tank (1).
- A kind of 4. dual measuring device of liquid level according to claim 3, it is characterised in that：The probe is fixed Hole is more than or equal to five.
- A kind of 5. dual measuring device of liquid level according to claim 3, it is characterised in that：The level probe component (2) magnetic connector (17), fastening screw nut (18) and level probe (19) are included；Level probe (19) is fixed by fastening screw nut (18) In the lower end of magnetic connector (17)；Binding post (5) is fixed on the upper end of magnetic connector (17)；Magnetic connector (17) is passed through on blind plate (6) Probe mounting hole, is fixed on blind plate (6) by clamp nut.
- A kind of 6. dual measuring device of liquid level according to claim 5, it is characterised in that：Described magnetic connector (17) appearance Face is formed for magnetic with blind plate (6) insulate, and inside is conductive material；The upper end of conductive material is fixedly connected with binding post (5), lower end It is provided with female hole, is fixedly connected with level probe (19).
- A kind of 7. dual measuring device of liquid level according to claim 6, it is characterised in that：The level probe (19) Top is provided with external screw thread；Level probe (19) be divided into common probe, ultralow level probe, low liquid level probe, high liquid level probe, Superelevation level probe, length are reduced successively；Level probe component (2) shares five, installs five kinds of different level probes respectively (19)。
- A kind of 8. dual measuring device of liquid level according to claim 1, it is characterised in that：The heavy water catch tank (1), Level probe component (2) and blind plate (6) are made of 304 stainless steels；Back with water inlet line (3) and flowing line (14) and pipeline are equal It is made of nuclear grade stainless steel steel pipe.
- A kind of 9. dual measuring device of liquid level according to claim 5, it is characterised in that：It further includes sealing ring (15)； Sealing ring (15) is sleeved on magnetic connector (17), between clamp nut and blind plate (6).
- A kind of 10. dual measuring device of liquid level according to claim 3, it is characterised in that：It further includes blind plate fastening spiral shell Bolt (16)；Blind plate fastening bolt (16) is installed in the mounting hole of blind plate (6) and the blind plate mounting hole of heavy water catch tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721113706.4U CN207264791U (en) | 2017-09-01 | 2017-09-01 | A kind of dual measuring device of liquid level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721113706.4U CN207264791U (en) | 2017-09-01 | 2017-09-01 | A kind of dual measuring device of liquid level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207264791U true CN207264791U (en) | 2018-04-20 |
Family
ID=61923700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721113706.4U Active CN207264791U (en) | 2017-09-01 | 2017-09-01 | A kind of dual measuring device of liquid level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207264791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610789A (en) * | 2017-09-01 | 2018-01-19 | 中核核电运行管理有限公司 | A kind of dual measurement apparatus of liquid level |
-
2017
- 2017-09-01 CN CN201721113706.4U patent/CN207264791U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610789A (en) * | 2017-09-01 | 2018-01-19 | 中核核电运行管理有限公司 | A kind of dual measurement apparatus of liquid level |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204881789U (en) | Nuclear power flotation pontoon liquid level switch off -line check -up auxiliary device | |
| CN203479631U (en) | Pressure testing device for metal hose | |
| CN207264791U (en) | A kind of dual measuring device of liquid level | |
| CN208097178U (en) | A kind of fire fighting device monitoring system | |
| CN107610789A (en) | A kind of dual measurement apparatus of liquid level | |
| CN207231730U (en) | Locomotive rain test system | |
| CN206583898U (en) | A kind of water acquisition water distribution pipeline system for water quality monitoring | |
| CN205151801U (en) | Automatic medicament feeding system | |
| CN109432680B (en) | Method and system for testing water at tail ends in manual-automatic parallel mode | |
| CN202170544U (en) | Water level monitoring device applied in water tank | |
| CN202992652U (en) | Automatic intelligent type high-pressure gas drainer | |
| CN107505094A (en) | Locomotive rain test system and operating method | |
| CN109631149B (en) | Monitoring system for long-distance thermal pipeline | |
| CN106643993B (en) | Device for low-temperature test of water supply vertical pipe and water meter | |
| CN215585945U (en) | Ammonia gas leakage emergency system in nitrogen preparation | |
| CN109653155A (en) | A kind of gate water-filling concora crush method | |
| CN205602484U (en) | Fuel bumping warning emergency treatment equipment | |
| CN209014023U (en) | A kind of transmitter defroster | |
| CN108869412A (en) | A kind of the combustion engine compressor blade cleaning device and method of automatic control | |
| CN205898258U (en) | Frost prevention type magnetism floats level gauge | |
| CN205998991U (en) | A kind of styrene discharge system | |
| CN109654594A (en) | Intelligent pipeline compensator accident warning device | |
| CN203891132U (en) | Non-negative pressure water supply system with double-protection function | |
| CN214762996U (en) | Regional intelligent air compression foam fire extinguishing system | |
| CN219836071U (en) | Terminal water test device of automatic water spraying fire extinguishing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |