CN106640113B - A kind of water supply and cooling system for TBM - Google Patents
A kind of water supply and cooling system for TBM Download PDFInfo
- Publication number
- CN106640113B CN106640113B CN201710127311.8A CN201710127311A CN106640113B CN 106640113 B CN106640113 B CN 106640113B CN 201710127311 A CN201710127311 A CN 201710127311A CN 106640113 B CN106640113 B CN 106640113B
- Authority
- CN
- China
- Prior art keywords
- water
- tbm
- system unit
- connect
- cooling
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 202
- 238000001816 cooling Methods 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 claims abstract description 23
- 239000000498 cooling water Substances 0.000 claims description 20
- 125000004122 cyclic group Chemical group 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 230000013011 mating Effects 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/11—Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses a kind of water supply for TBM and cooling systems, the system comprises outer circulation water system unit (1), interior circulation unit, TBM construction water system unit and outer circulation water cooling system units, the outer circulation water system unit passes through a pair of of outlet conduit and connect with a pair of of water return pipeline with interior circulation unit, the interior circulation unit is connect with TBM construction water system unit and outer circulation water cooling system unit respectively by pipeline, and the outer circulation water cooling system unit is connect by pipeline with TBM construction water system unit.Structure of the invention is ingenious in design, low in cost, service-strong advantage, practical water consumption, displacement and wastewater flow rate so that TBM constructs is not only able to using it to be substantially reduced, save water supply, draining and sewage treatment expense, and, this system is enabled to for all hot water of expendable water, for cooling external circulating water-cooled, but effect is good, ensure that the good operation of relevant device.
Description
Technical field
The present invention relates to a kind of water supply and cooling system, especially a kind of water supply and cooling system for TBM.
Background technique
Currently, needing to consume a large amount of water in TBM work progress, wherein consumed water is mainly used for two aspects,
First is that cutterhead is sprayed water, main shaft seals wash away, jumbolter drills, belt washes away, each position is rinsed etc., belong to expendable use
Water;Second is that the cooling of the systems such as hydraulic system, lubricating system, main drive motor and gearbox, frequency converter and equipment, belongs to cooling
Use water.
There are mainly two types of existing TBM water supply and water cooling system have, the first is open by design, and water inlet is through pipe outside hole
Road is delivered to TBM cold water storage cistern, then is pumped to each expendable and cooling water station, and tunnel is discharged into after heat exchange for cooling water
Road or foul water tank;Second is semi-enclosed design, the difference is that, cooling water is designed as enclosed and follows with the first
Loop system, cooling medium are the mixed liquor of coolant liquid or coolant liquid and distilled water, can effectively avoid generation scale, while to cold
But medium is cooled down using the water in cold water storage cistern, and water inlet returns to cold water storage cistern after heat exchange outside hole.Although both systems are equal
It is able to carry out water supply and cooling, still, the first structure water consumption is big, the easy fouling of water-cooling system, and second of system still has
The larger problem of water consumption.
Summary of the invention
It is an object of the invention to provide a kind of water supply for TBM that can be effectively reduced water consumption and cooling systems.
It is realized the purpose of the present invention is technical solution in this way, a kind of water supply and cooling system for TBM, institute
The system of stating includes outer circulation water system unit, interior circulation unit, TBM construction water system unit and the cooling of outer circulation water
System unit, the outer circulation water system unit pass through a pair of of outlet conduit and a pair of of water return pipeline and interior circulation unit
Connection, the interior circulation unit by pipeline respectively with TBM construction water system unit and outer circulation water cooling system
Unit connection, the outer circulation water cooling system unit are connect by pipeline with TBM construction water system unit.
Wherein, the outer circulation water system unit includes cold water storage cistern, and the cold water storage cistern outside water inlet line A and hole by intaking
Connection, centrifugal pump A, centrifugal pump B and outlet conduit A, outlet conduit B and the interior circulation that the cold water storage cistern is arranged by pair of parellel
The connection of water system unit.
In order to carry out water inlet monitoring and filtering, thermometer, pressure are disposed with along water inlet direction on the water inlet line A
The bag filter with butterfly valve of power table and a pair of of parallel arrangement.
Further, the interior circulation unit includes interior cyclic water tank, rear mating region cooler and with main driving
The host region pumping plant cooler of motor, the interior cyclic water tank pass through centrifugal pump C and centrifugal pump D and host region pumping plant respectively
Cooler is connected with rear mating region cooler, and the host region pumping plant cooler and rear mating region cooler pass through respectively
Cooler A and cooler B are connect with interior cyclic water tank;The recovery channel includes water return pipeline A and recovery channel B, and described time
Respectively one end is connect with cooler A and cooler B waterpipe A and recovery channel B respectively, and the other end is connect with cold water storage cistern.
Further, the TBM construction water system unit includes reservoir, the reservoir by water inlet line B and into
Waterpipe C is connect with water return pipeline A and recovery channel B respectively, and the reservoir passes through centrifugal pump E, centrifugal pump F and centrifugation respectively
Pump G and TBM is connected with water pipe.
Further, in order to cool down to recirculated water, the outer circulation water cooling system unit includes the drop with drainpipe
Reservoir, the cooling water tank are connect with water inlet line B and water inlet line C respectively by water inlet line D and water inlet line E, institute
Cooling water tank is stated to connect by centrifugal pump H and outlet conduit C with reservoir.
For level monitoring and water temperature, on the cold water storage cistern, on interior cyclic water tank, on reservoir and on cooling water tank
It is provided with temperature sensor and liquid level sensor.
By adopting the above-described technical solution, structure of the invention is ingenious in design, low in cost, service-strong advantage, adopt
It is not only able to practical water consumption, displacement and wastewater flow rate so that TBM constructs with it to be substantially reduced, saves water supply, draining and sewage
Processing cost, moreover, this system enables to but imitate for all hot water of expendable water for cooling external circulating water-cooled
Fruit is good, ensure that the good operation of relevant device.
Detailed description of the invention
Detailed description of the invention of the invention is as follows:
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is outer circulation water system unit enlarged structure schematic diagram of the invention;
Fig. 3 is interior circulation unit enlarged structure schematic diagram of the invention;
Fig. 4 is TBM construction water system unit enlarged structure schematic diagram of the invention;
Fig. 5 is outer circulation water cooling system unit enlarged structure schematic diagram of the invention.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, but the present invention does not limit to
In these embodiments, any improvement or substitution on the present embodiment essence spirit still falls within the claims in the present invention and is wanted
Seek the range of protection.
Embodiment 1: as shown in Figure 1, a kind of water supply and cooling system for TBM, the system comprises outer circulation water systems
System unit 1, interior circulation unit 2, TBM construction water system unit 3 and outer circulation water cooling system unit 4, it is described outer
Circulation unit 1 passes through a pair of of outlet conduit and connect with a pair of of water return pipeline with interior circulation unit 2, described interior to follow
Ring water system unit 2 is connect with TBM construction water system unit 3 and outer circulation water cooling system unit 4 respectively by pipeline, institute
Outer circulation water cooling system unit 4 is stated to connect by pipeline with TBM construction water system unit 3.
In the present invention, outer circulation water system unit 1 is carried out cold by cooler A20 and cooler B21 inner loop water
But, interior recirculated water water temperature is made to reach normal construction requirement.Outer circulation water system unit 1 passes through pneumatic operated valve and TBM construction water system
Unit 3 of uniting connects, and outer circulation water constantly to 24 nourishment source of reservoir, meets TBM construction water demand.Outer circulation water system list
Member 1 is connected by pneumatic operated valve and cooling system unit outer circulation water cooling system unit 4, and outer circulation cooling water can flow into temperature lowering water
Case 31 cools down.Outer circulation water cooling system unit 4 is attached by centrifugal pump 34 and TBM construction water system unit 3,
The water of cooling water tank 31 can be discharged into reservoir 24.
As shown in Fig. 2, above-mentioned outer circulation water system Unit 1 includes cold water storage cistern 5, the cold water storage cistern 5 passes through water inlet line A6
It connect with intaking outside hole, centrifugal pump A7, centrifugal pump B8 and outlet conduit A9 that the cold water storage cistern 5 is arranged by pair of parellel, goes out
Waterpipe B10 is connect with interior circulation unit 2.
In order to carry out water inlet monitoring and filtering, thermometer is disposed with along water inlet direction on the water inlet line A6
11, the bag filter 14 with butterfly valve 13 of pressure gauge 12 and a pair of of parallel arrangement.
As shown in figure 3, interior circulation unit 2 described above includes interior cyclic water tank 15, rear mating region cooler
17 and the host region pumping plant cooler 16 with main drive motor 38, the interior cyclic water tank 15 respectively by centrifugal pump C18 and
Centrifugal pump D19 is connect with host region pumping plant cooler 16 and rear mating region cooler 17, and the host region pumping plant is cooling
Device 16 and rear mating region cooler 17 are connect by cooler A20 and cooler B21 with interior cyclic water tank 15 respectively;Described time
Closed tube road include water return pipeline A22 and recovery channel B23, the water return pipeline A22 and recovery channel B23 respectively one end respectively with
Cooler A20 is connected with cooler B21, and the other end is connect with cold water storage cistern 5.
As shown in figure 4, above-mentioned TBM construction water system unit 3 includes reservoir 24, the reservoir 24 passes through water inlet pipe
Road B25 and water inlet line C26 are connect with water return pipeline A22 and recovery channel B23 respectively, and the reservoir 24 passes through centrifugation respectively
Pump E27, centrifugal pump F28 and centrifugal pump G29 and TBM are connected with water pipe.
As shown in figure 5, above-mentioned outer circulation water cooling system unit 4 includes the cooling water tank 31 with drainpipe 30, the drop
Reservoir 31 is connect with water inlet line B25 and water inlet line C26 respectively by water inlet line D32 and water inlet line E33, the drop
Reservoir 31 is connect by centrifugal pump H34 and outlet conduit C35 with reservoir 24.
In order to be monitored to water level and water temperature, on the cold water storage cistern 5, on interior cyclic water tank 15, on reservoir 24 and
Temperature sensor 36 and liquid level sensor 37 are provided on cooling water tank 31.
Its work of the invention was originally as follows: installation thermometer 11, pressure gauge 12 are monitored on water inlet line A6 outside hole, together
When installation two sets butterfly valves 13, bag filter 14 be filtered, the water quality of guarantee TBM water system.Water inlet passes through Pneumatic ball outside hole
Valve flows into cold water storage cistern 5, and when liquid level sensor monitoring water level reaches the upper limit in cold water storage cistern 5, pneumatic ball valve is closed, and water level reaches lower limit
When pneumatic ball valve open.Centrifugal pump A7 and centrifugal pump B8 guides cold water into cooler A20 and cooler B21, passes through cooler A20
With the cooling interior recirculated water of cooler B21.
Interior circulating water cooling system is closed system, closes independent operating, and cooling medium is from heat-producing device bring heat
But system realizes heat exchange with external circulating water-cooled in cooler.Interior cyclic water tank 15 is equipped with temperature sensor, level sensing
Device, to monitor interior circulation working order, when temperature reaches the upper limit or liquid level reaches lower limit, centrifugal pump C18 and from
Heart pump D19 is closed.It is cold that interior recirculated water by centrifugal pump C18 and centrifugal pump D19 is pumped to main drive motor 38, host region pumping plant
But device 16 and rear mating region cooler 17, carry out being cooled and returned to interior circulation eventually by cooler A20 and cooler B21
Water tank 15.
Outer circulation water through subcooler A20 and cooler B21 preferentially flows into reservoir 24, feeds TBM construction water.
TBM construction water provides power by centrifugal pump E27, centrifugal pump F28 and centrifugal pump G29, starts at any time, guarantees that each working face is used
Water demand.When 24 liquid level sensor of reservoir monitoring water level reaches lower limit, pneumatic ball valve is opened, and outer circulation cooling water flows into temperature
Water tank 24;When 24 water level of reservoir reaches the upper limit, pneumatic ball valve is closed.
If 5 temperature sensor of cold water storage cistern monitors that water temperature reaches the upper limit and pneumatic ball valve is closed, pneumatic ball valve is opened,
Outer circulation cooling water flows directly into cooling water tank 31, when 31 liquid level sensor of cooling water tank monitors that water level reaches the upper limit, pneumatically
Ball valve is opened, and the water of cooling water tank 31 is immediately discharged to outside hole;When water level reaches lower limit, pneumatic ball valve is closed.
When 31 temperature sensor of cooling water tank monitor water temperature drop to when meeting construction requirement, and 31 liquid level of reservoir
When sensor is not up to the upper limit, centrifugal pump H34 starting is drained into water in reservoir 24,24 water level of reservoir reaches the upper limit or drop
Centrifugal pump H24 is closed when 31 water level of reservoir reaches lower limit, achievees the purpose that outer circulation water cools down automatically, is recycled.
Claims (5)
1. a kind of water supply and cooling system for TBM, it is characterized in that: the system comprises outer circulation water system units (1), interior
Circulation unit (2), TBM construction water system unit (3) and outer circulation water cooling system unit (4), the outer circulation
Water system unit (1) passes through a pair of of outlet conduit and connect with a pair of of water return pipeline with interior circulation unit (2), described interior to follow
Ring water system unit (2) by pipeline respectively with TBM construction water system unit (3) and outer circulation water cooling system unit (4)
Connection, the outer circulation water cooling system unit (4) are connect by pipeline with TBM construction water system unit (3);It is followed outside described
Ring water system unit (1) includes cold water storage cistern (5), and the cold water storage cistern (5) passes through water inlet line A(6) it connect with intaking outside hole, it is described
The centrifugal pump A(7 that cold water storage cistern (5) is arranged by pair of parellel), centrifugal pump B(8) and outlet conduit A(9), outlet conduit B(10)
It is connect with interior circulation unit (2);The interior circulation unit (2) includes interior cyclic water tank (15), rear mating area
Domain cooler (17) and host region pumping plant cooler (16) with main drive motor (38), the interior cyclic water tank (15) is respectively
Pass through centrifugal pump C(18) and centrifugal pump D(19) connect with host region pumping plant cooler (16) and rear mating region cooler (17)
Connect, the host region pumping plant cooler (16) and rear mating region cooler (17) pass through cooler A(20 respectively) and it is cooling
Device B(21) it is connect with interior cyclic water tank (15);Recovery channel includes water return pipeline A(22) and recovery channel B(23), the return water
Pipeline A(22) and recovery channel B(23) respectively one end connect respectively with cooler A(20) and cooler B(21), the other end with it is cold
Water tank (5) connection.
2. as described in claim 1 for the water supply of TBM and cooling system, it is characterized in that: in the water inlet line A(6) on
The pocket type mistake with butterfly valve (13) of thermometer (11), pressure gauge (12) and a pair of of parallel arrangement is disposed with along water inlet direction
Filter (14).
3. as claimed in claim 2 for the water supply of TBM and cooling system, it is characterized in that: the TBM construction water system
Unit (3) includes reservoir (24), the reservoir (24) pass through water inlet line B(25) and water inlet line C(26) respectively with time
Waterpipe A(22) and recovery channel B(23) connect, the reservoir (24) passes through centrifugal pump E(27), centrifugal pump F(28 respectively)
It is connected with centrifugal pump G(29) and TBM with water pipe.
4. as claimed in claim 3 for the water supply of TBM and cooling system, it is characterized in that: the outer circulation water cooling system
Unit (4) includes the cooling water tank (31) with drainpipe (30), and the cooling water tank (31) passes through water inlet line D(32) and water inlet
Pipeline E(33) it is connect respectively with water inlet line B(25) and water inlet line C(26), the cooling water tank (31) passes through centrifugal pump H
(34) and outlet conduit C(35) connect with reservoir (24).
5. as claimed in claim 4 for TBM water supply and cooling system, it is characterized in that: on the cold water storage cistern (5), it is interior
On cyclic water tank (15), on reservoir (24) and temperature sensor (36) and liquid level sensor are provided on cooling water tank (31)
(37).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710127311.8A CN106640113B (en) | 2017-03-06 | 2017-03-06 | A kind of water supply and cooling system for TBM |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710127311.8A CN106640113B (en) | 2017-03-06 | 2017-03-06 | A kind of water supply and cooling system for TBM |
Publications (2)
Publication Number | Publication Date |
---|---|
CN106640113A CN106640113A (en) | 2017-05-10 |
CN106640113B true CN106640113B (en) | 2019-01-08 |
Family
ID=58847406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710127311.8A Active CN106640113B (en) | 2017-03-06 | 2017-03-06 | A kind of water supply and cooling system for TBM |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106640113B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107747497A (en) * | 2017-11-30 | 2018-03-02 | 中国科学院武汉岩土力学研究所 | Heat exchange bolt-spary supports system and country rock cool-down method |
CN110486024B (en) * | 2019-07-23 | 2024-09-10 | 中铁建华南建设有限公司 | External circulating water cooling method and device for shield system |
CN110344840B (en) * | 2019-08-16 | 2024-04-02 | 中铁工程装备集团有限公司 | External water circulation system with automatic control for TBM and external water circulation method |
CN111795587B (en) * | 2020-07-21 | 2022-08-02 | 中铁工程装备集团有限公司 | Water circulation system and working method thereof |
CN112556303A (en) * | 2020-09-17 | 2021-03-26 | 中铁工程装备集团有限公司 | Cooling water circulation system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005194720A (en) * | 2003-12-29 | 2005-07-21 | Toyo Denki Industrial Co Ltd | Sludge pump for tunneling work |
CN201241706Y (en) * | 2008-08-19 | 2009-05-20 | 中铁十八局集团有限公司 | Waste water cycling and reutilizing apparatus of open type tunnel boring machine |
CN102268994B (en) * | 2011-08-15 | 2013-02-20 | 大连华锐重工集团股份有限公司 | Water supply system of composite earth pressure balance shield machine |
CN202707061U (en) * | 2012-08-01 | 2013-01-30 | 兖州煤业股份有限公司 | Novel internal waterway system of heading machine |
CN103628891B (en) * | 2013-11-21 | 2016-08-17 | 上海市基础工程集团有限公司 | The control method of shield machine hydrologic cycle cooling system |
CN203716965U (en) * | 2013-12-30 | 2014-07-16 | 凯盛重工有限公司 | Water system for heading machine |
CN204060698U (en) * | 2014-09-20 | 2014-12-31 | 辽宁三三工业有限公司 | Shield machine water cooling system |
CN104234718A (en) * | 2014-09-20 | 2014-12-24 | 辽宁三三工业有限公司 | Water cooling system of shield tunneling machine |
CN204872687U (en) * | 2015-07-16 | 2015-12-16 | 郑州市第一建筑工程集团有限公司 | Shield constructs quick -witted hydroblasting system |
CN205252617U (en) * | 2015-11-26 | 2016-05-25 | 中铁十六局集团地铁工程有限公司 | Slurry shield tunnel sewage cycle utilizes device |
CN205895243U (en) * | 2016-06-27 | 2017-01-18 | 中交一公局第三工程有限公司 | Outer recirculating cooling water system of single shield TBM |
CN206592132U (en) * | 2017-03-06 | 2017-10-27 | 中铁十八局集团有限公司 | A kind of water supply and cooling system for TBM |
-
2017
- 2017-03-06 CN CN201710127311.8A patent/CN106640113B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN106640113A (en) | 2017-05-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106640113B (en) | A kind of water supply and cooling system for TBM | |
CN204168697U (en) | A kind of dual cycle cooling system for high-power electronic device | |
CN207963066U (en) | A kind of shield machine environment temperature intelligence control system | |
CN204553798U (en) | Gear box lubricating oil temperature control system | |
CN206592132U (en) | A kind of water supply and cooling system for TBM | |
CN106168284A (en) | Wind power gear box lubrication oil secondary cooling system | |
CN207880415U (en) | A kind of lubricating system of horizontal centrifuge | |
CN107424754B (en) | Transformer cooling system of offshore transformer substation | |
CN206595840U (en) | A kind of development machine circulating cooling system | |
CN102086803A (en) | Engine and engine oil cooling circulation system thereof | |
CN116723685A (en) | Liquid cooling heat dissipation system | |
CN202153108U (en) | Fluid heat exchanger | |
CN203098410U (en) | Water-ring vacuum pump water circulation system | |
CN212377730U (en) | Bearing sleeve cooling and lubricating device | |
CN205744503U (en) | A kind of blockage resisting submersible sewage pump of good cooling results | |
CN205283375U (en) | Cooling device of power module | |
CN204417655U (en) | Crystal growing furnace power supply water circle device | |
CN203978347U (en) | Land rig drilling fluid, mud forced cooling device | |
CN206206327U (en) | A kind of automation hydraulic oil cooling device of column type hydraulic rotary drilling rig | |
CN208312826U (en) | A kind of frequency converter cooling circulating water automatically supplying apparatus | |
CN206694257U (en) | It is a kind of that there is the water-ring vacuum pump for reducing sealing coolant-temperature gage | |
CN206033187U (en) | Liquid filling machine cooling water circulation system | |
CN207049119U (en) | A kind of oil temperature cooling device of plant equipment | |
CN206944564U (en) | A kind of cooling water system for downhole cooling refrigeration system | |
CN104227544B (en) | Ball mill mechanical seal protection device |
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 |