CN106703113B - A kind of mining TBM water circulation systems and method - Google Patents
A kind of mining TBM water circulation systems and method Download PDFInfo
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- CN106703113B CN106703113B CN201710098670.5A CN201710098670A CN106703113B CN 106703113 B CN106703113 B CN 106703113B CN 201710098670 A CN201710098670 A CN 201710098670A CN 106703113 B CN106703113 B CN 106703113B
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- water
- mining tbm
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
- E03B1/02—Methods or layout of installations for water supply for public or like main supply for industrial use
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/30—Relating to industrial water supply, e.g. used for cooling
Abstract
The invention discloses a kind of mining TBM water circulation systems and method, including external water source, interior periodical feeding pipe, interior circulation waterway, interior recycling outlet and multiple mining TBM external equipment；The import of periodical feeding pipe in the external water source connection, the import of circulation waterway in the outlet connection of the interior periodical feeding pipe, recycling outlet in the outlet connection of the interior circulation waterway, what the outlet of the interior recycling outlet was connected to each mining TBM external equipment uses water inlet.External water source supplies water and arrives interior cyclic water tank, is redistributed to each water pump；Mining TBM internal unit uses corresponding to as water pump, water supplied, the external equipment use by the externally discharged equipment feed pipe of water circulation for mining TBM again after use；Mining TBM external equipment directly discharges water into tunnel floor using rear.Water circulation system cooling-down effect substantially improves, and can meet that equipment water and cooling require, improve equipment operation rate, rapidly and efficiently tunneled for mining TBM and provide powerful guarantee.
Description
Technical field
The present invention relates to a kind of mining TBM water system, more particularly to a kind of mining TBM water circulation systems and side
Method.
Background technology
In recent years, rock roadway in coal mine speedy drivage problem, is always the key factor for restricting and efficiently producing, and the pick of traditional big gun is applied
Work, drilling depth efficiency is low, and security threat is big, 2015, and first of world vertical rock roadway in coal mine full face tunnel boring machine (mining TBM) is being opened
Collect colliery success of the test, the equipment has successively been constructed Ji Kuang Norths 1413A suction roads and a 1415A suction roads, tunnels total length
More than 2000 meters.560 meters of highest drill footage per month, thoroughly solves the bottleneck problem for restricting rock gangway speedy drivage.But in 1413A suction roads
During driving, operationally, hydraulic pressure and electric-control system produce extensive work heat to mining TBM, and these heats are all to pass through water system
System cooling back installation carries out neutralization cooling, but mining TBM hydrologic cycle cooling systems can not meet to tunnel needs, cooling effectiveness
It is low, system complex, safeguard cumbersome.
The hydrologic cycle cooling system used at present includes interior circulation and outer circulation water system two parts.Outer circulation water
System is that roof-bolter, belt feeder, dedusting fan, cutterhead spraying, and other domestic waters provide water source.Interior circulation,
For hydraulic station, power distribution cabinet, frequency converter, main driving lubrication and cutter motor and decelerator cooling, outer circulation water system
Outer circulation cold water is made to absorb the heat of interior circulating hot water by heat exchanger with interior circulation, to reach mining TBM systems
The purpose of system cooling, the statement more than are not difficult to find out that outer circulation water for roof-bolter, belt feeder, dedusting fan, cutterhead except spraying
Mist, and other domestic waters are provided outside water source, and another major function is exactly to be circulated in being cooled down by heat exchanger
Water.Therefore, as shown in figure 1, outer circulation water system outside cold water storage cistern 1 ', boiler 2 ', the first external circulation water pump 3 ', second including following
Ring water pump (not shown), cold water storage cistern 1 ' are connected with boiler 2 ' by linker, on boiler 2 ' by filling pipe 4 ' even
External water source is connect, water source enters boiler 2 ' and neutralized afterwards with hot water, then enters cold water storage cistern 1 ' by linker, cold water storage cistern 1 '
Water absorbs heat exchange by heat exchanger on the first external circulation water pump 3 ' and the pump of outlet pipe 7 ' cold water to mining TBM trailers, cold water
After heat in device, a part returns to boiler 2 ' by return pipe 5 ', and a part is pumped out for anchor by the second external circulation water pump
Bar machine, belt feeder, dedusting fan, cutterhead spraying, and other domestic waters use.Boiler 2 ' is back to by hot-water line
, it is necessary to by shower 6 ' cooling after, enter back into boiler 2 ', then carry out reciprocation cycle.
The problem of current mining TBM water circulation systems are present：
1st, because the limitation of supporting trailer space after mining TBM, cold water storage cistern 1 ', boiler 2 ' can not be placed on trailer,
Also can not just be managed with mining TBM is portable, therefore when 1413A suction roads are constructed, two water tanks are arranged on assembling cave
Interior, thus need special messenger to nurse the first water pump 3 ' in assembling chamber, in boiler water shortage, carry out moisturizing in time, prevent
Water pump is unloaded.
2nd, as the increase of driving distance, the load of the water pump of outer circulation water system are gradually increased, and it is one-in-and-one-out,
Pump load is incremented by with 2 speeds of tunnelling distance, when 300 meters or so of roadway construction, the water system circulating cooling side
Formula can not meet equipment cooling demand, and a coolant-temperature gage being into boiler is higher, and natural cooling speed is slow, second,
The water supply distance of water system is longer, and pump load is larger, easily causes fault of water pump, influences to produce.
3rd, need to be mounted so that water return pipeline all the way, hot water is led back to boiler, the water return pipeline is general using ore deposit
The water pipe of diameter 89 is extended, and is carried out with the extension of other pipelines in work progress, is thus virtually increased in the lump
The preparation amount before mining TBM tunneling constructions is added, has caused the waste of material and human resources, the work for adding worker is strong
Degree.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of mining TBM water circulation systems and method,
Realize the effective temperature-reducing to mining TBM.
The present invention is achieved by the following technical solutions, and the present invention includes external water source, interior periodical feeding pipe, interior circulation
The external equipment in water route, interior recycling outlet and multiple mining TBM；The import of periodical feeding pipe in the external water source connection,
The interior periodical feeding pipe outlet connection in circulation waterway import, the interior circulation waterway outlet connection in cyclic water outlet
Pipe, what the outlet of the interior recycling outlet was connected to each mining TBM external equipment uses water inlet.
The external water source is direct-furnish water source.It is directly connected to the water under high pressure of mine direct-furnish, convenient use,
Water supply water temperature≤28 DEG C of the external water source.It may insure cooling effect.
The external water source is managed provided with road, and the outlet of the road pipe is directly connected to each mining TBM external equipment
Use water inlet.
The road pipe is provided with gate valve.When the heat hydraulic pressure that equipment downtime progress supporting or interior circulation waterway pump out can not
Meet to realize that external water source directly supplies water during the system water requirements such as cutterhead spraying.
The interior circulation waterway includes interior cyclic water tank, at least one internal circulation water pump, mining TBM internal unit；Institute
The outlet of periodical feeding pipe in the import connection of interior cyclic water tank is stated, the outlet connection internal circulation water pump of the interior cyclic water tank
Import, mining TBM internal unit corresponding to the outlet connection of the internal circulation water pump use water inlet, the mining TBM's
The import that interior recycling outlet is connected respectively to water out of internal unit.
The internal circulation water pump has two, respectively the first internal circulation water pump and the second internal circulation water pump, the mining TBM
Internal unit have two groups, respectively first group mining TBM internal unit and second group of mining TBM internal unit；It is described
The outlet of periodical feeding pipe in the import connection of interior cyclic water tank, the outlet of the interior cyclic water tank connects in first respectively to be circulated
The import of water pump and the second internal circulation water pump, first group of mining TBM of outlet connection of first internal circulation water pump inside are set
Standby uses water inlet, and second group of mining TBM of outlet connection of second internal circulation water pump internal unit uses water inlet, institute
That states first group of mining TBM internal unit and second group of mining TBM internal unit is connected respectively to interior circulation with water out
The import of outlet pipe.
The interior cyclic water tank is sealing type cistern.It is placed on mining TBM trailers, can random movement.
A kind of mining TBM water circulations method, comprises the following steps：
(1) external water source supplies water and arrives interior cyclic water tank, is redistributed to each water pump；
(2) internal unit of mining TBM corresponding to water is supplied as water pump uses, and is again discharged into water circulation outside after use
Portion's equipment feed pipe uses for mining TBM external equipment；
(3) mining TBM external equipment directly discharges water into tunnel floor using rear；
(4) water after mining TBM internal unit use can not meet the requirement of mining TBM external equipment,
Gate valve is then opened, external water source directly supplies water to mining TBM external equipment.
A kind of application of mining TBM water circulation systems in mining TBM.
The present invention has advantages below compared with prior art：Present invention eliminates outer circulation water system, eliminate boiler,
Cold water storage cistern and corresponding water pump, while heat exchanger is eliminated, reduce the installation workload of water return pipeline all the way in addition, reduce
Equipment installation and the workload safeguarded, while eliminate and see pump personnel and part pipeline extension line project, and it is improved
Water circulation system cooling-down effect substantially improves, and can meet that equipment water and cooling require, improve equipment operation rate, be mining TBM
Rapidly and efficiently driving provides powerful guarantee.
Brief description of the drawings
Fig. 1 is the structural representation of the outer circulation water system of prior art；
Fig. 2 is the structural representation of the present invention.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
As shown in Fig. 2 the present embodiment includes external water source 1, interior periodical feeding pipe 2, interior circulation waterway 3, interior cyclic water outlet
The external equipment 5 of pipe 4 and multiple mining TBM；The external water source 1 connects the import of interior periodical feeding pipe 2, and the interior circulation supplies
Water pipe 2 outlet connection in circulation waterway 3 import, the interior circulation waterway 3 outlet connection in recycling outlet 4, it is described
What the outlet of interior recycling outlet 4 was connected to each mining TBM external equipment 5 uses water inlet.External water source 1 is provided with road
Pipe, the road pipe are provided with gate valve 6, and the outlet of the road pipe is directly connected to being entered with water for each mining TBM external equipment 5
Mouthful.When the heat hydraulic pressure that equipment downtime progress supporting or interior circulation waterway 3 pump out can not meet the system waters such as cutterhead spraying
It is required that when realize that external water source 1 directly supplies water.
The interior circulation waterway 3 of the present embodiment includes interior cyclic water tank 31, the first internal circulation water pump 32, the second internal circulation water pump
33rd, first group of mining TBM internal unit 34 and second group of mining TBM internal unit 35, the interior cyclic water tank 31 enter
The outlet of periodical feeding pipe 2 in mouthful connection, the outlet of the interior cyclic water tank 31 connect the first internal circulation water pump 32 and the respectively
The import of two internal circulation water pumps 33, first group of mining TBM of outlet connection of first internal circulation water pump 32 internal unit 34
Use water inlet, second internal circulation water pump 33 outlet connection second group of mining TBM internal unit 35 use water inlet,
The internal unit 34 of first group of mining TBM and second group of mining TBM internal unit 35 are connected respectively to water out
The import of interior recycling outlet 4.
In the present embodiment, mining TBM external equipment 5 includes roof-bolter, belt feeder, dedusting fan, cutterhead spraying, and
Other domestic waters etc..
First group of mining TBM internal unit 34 includes the internal units such as hydraulic station, power distribution cabinet, frequency converter, second group of ore deposit
Include main driving lubricating component, cutter motor and decelerator etc. with TBM internal unit 35.
The external water source 1 of the present embodiment is direct-furnish water source.The water under high pressure of mine direct-furnish, about 5MPa are directly connected to, is conveniently made
With water temperature≤28 DEG C of external water source 1.It may insure cooling effect.
The interior cyclic water tank 31 of the present embodiment is sealing type cistern.It is placed on mining TBM trailers, can random movement.
A kind of mining TBM water circulations method, comprises the following steps：
(1) external water source 1 supplies water and arrives interior cyclic water tank 31, is redistributed to each water pump；
(2) internal unit of mining TBM corresponding to water is supplied as water pump uses, and is again discharged into water circulation outside after use
Portion's equipment feed pipe uses for mining TBM external equipment 5；
(3) tunnel floor is directly discharged water into after the mining TBM use of external equipment 5；
(4) water after mining TBM internal unit use can not meet the requirement of mining TBM external equipment 5,
Gate valve 6 is then opened, external water source 1 directly supplies water to mining TBM external equipment 5.
External water source 1 is introduced directly into interior cyclic water tank 31, interior recirculated water passes through in the first internal circulation water pump 32 and second
Water circulating pump 33 is pumped out for cooling down hydraulic station, power distribution cabinet, frequency converter, main driving lubrication and cutter motor and decelerator, from
The water of these equipment outflow directly uses for roof-bolter, belt feeder, dedusting fan, cutterhead spraying and other domestic waters,
Draw in external water source 1 and manage all the way simultaneously, when the heat hydraulic pressure that equipment downtime carries out supporting or water pump pumps out can not meet knife
During the system water requirement such as disk spraying, the water under high pressure that directly can be provided by external water source 1 is supplied water, and is so also just eliminated
Outer circulation water system, while and can meets that Gentle water requirement drops in system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
- A kind of 1. mining TBM water circulation systems, it is characterised in that including external water source, interior periodical feeding pipe, interior circulation waterway, The external equipment of interior recycling outlet and multiple mining TBM；The import of periodical feeding pipe, described interior in the external water source connection Periodical feeding pipe outlet connection in circulation waterway import, the interior circulation waterway outlet connection in recycling outlet, institute The outlet for stating interior recycling outlet is connected to each mining TBM external equipment and uses water inlet.
- 2. a kind of mining TBM water circulation systems according to claim 1, it is characterised in that the external water source is direct-furnish Water source.
- A kind of 3. mining TBM water circulation systems according to claim 1, it is characterised in that the water supply of the external water source Water temperature≤28 DEG C.
- 4. a kind of mining TBM water circulation systems according to claim 1, it is characterised in that the external water source is provided with Lu Guan, what the outlet of the road pipe was directly connected to each mining TBM external equipment uses water inlet.
- 5. a kind of mining TBM water circulation systems according to claim 4, it is characterised in that the road pipe is provided with gate valve.
- 6. a kind of mining TBM water circulation systems according to claim 1, it is characterised in that the interior circulation waterway includes Interior cyclic water tank, at least one internal circulation water pump, mining TBM internal unit；Followed in the import connection of the interior cyclic water tank The outlet of ring feed pipe, the import of the outlet connection internal circulation water pump of the interior cyclic water tank, the outlet of the internal circulation water pump Mining TBM internal unit corresponding to connection uses water inlet, and the internal unit of the mining TBM is connected respectively with water out To the import of interior recycling outlet.
- 7. a kind of mining TBM water circulation systems according to claim 6, it is characterised in that the internal circulation water pump has two Individual, respectively the first internal circulation water pump and the second internal circulation water pump, the internal unit of the mining TBM have two groups, and respectively One group of mining TBM internal unit and second group of mining TBM internal unit；Circulated in the import connection of the interior cyclic water tank The outlet of feed pipe, the outlet of the interior cyclic water tank connect entering for the first internal circulation water pump and the second internal circulation water pump respectively Mouthful, first group of mining TBM of outlet connection of first internal circulation water pump internal unit uses water inlet, is followed in described second Second group of mining TBM of outlet connection of ring water pump internal unit uses water inlet, the internal unit of first group of mining TBM With the import that interior recycling outlet is connected respectively to water out of second group of mining TBM internal unit.
- 8. a kind of mining TBM water circulation systems according to claim 6, it is characterised in that the interior cyclic water tank is envelope Closed type water tank.
- A kind of 9. application method of mining TBM water circulation systems as described in any one of claim 1~8, it is characterised in that bag Include following steps：(1) external water source supplies water and arrives interior cyclic water tank, is redistributed to each water pump；(2) internal unit of mining TBM corresponding to water is supplied as water pump uses, and is set again by water circulation is externally discharged after use Available water pipe uses for mining TBM external equipment；(3) mining TBM external equipment directly discharges water into tunnel floor using rear；(4) water after mining TBM internal unit use can not meet the requirement of mining TBM external equipment, then beat Valve is opened a sluice gate, external water source directly supplies water to mining TBM external equipment.
- A kind of 10. application of mining TBM water circulation systems in mining TBM as described in any one of claim 1~8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710098670.5A CN106703113B (en) | 2017-02-23 | 2017-02-23 | A kind of mining TBM water circulation systems and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710098670.5A CN106703113B (en) | 2017-02-23 | 2017-02-23 | A kind of mining TBM water circulation systems and method |
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| CN106703113A CN106703113A (en) | 2017-05-24 |
| CN106703113B true CN106703113B (en) | 2018-01-16 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109209415B (en) * | 2018-11-13 | 2021-02-23 | 中国铁建重工集团股份有限公司 | Water system of hard rock tunnel boring machine |
| CN110160116B (en) * | 2019-04-23 | 2020-10-09 | 中国矿业大学 | Mine heat energy utilization system and heat supply method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201818309U (en) * | 2010-10-27 | 2011-05-04 | 石家庄煤矿机械有限责任公司 | Double-circulation lubricating and cooling device of cutting speed reducer of roadheader for coal mines |
| CN202194678U (en) * | 2011-08-18 | 2012-04-18 | 中煤矿山建设集团有限责任公司 | System for cooling mine by utilizing constant-temperature water bearing stratum |
| CN202690107U (en) * | 2012-08-06 | 2013-01-23 | 中国矿业大学 | Movable-type ice-water spray cooling apparatus for tunneling working face |
| CN206538807U (en) * | 2017-02-23 | 2017-10-03 | 淮南矿业(集团)有限责任公司 | A kind of mining TBM water circulation systems |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2482575B (en) * | 2011-05-03 | 2012-06-27 | Nigel Charles Savage | A water recirculation system |
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- 2017-02-23 CN CN201710098670.5A patent/CN106703113B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201818309U (en) * | 2010-10-27 | 2011-05-04 | 石家庄煤矿机械有限责任公司 | Double-circulation lubricating and cooling device of cutting speed reducer of roadheader for coal mines |
| CN202194678U (en) * | 2011-08-18 | 2012-04-18 | 中煤矿山建设集团有限责任公司 | System for cooling mine by utilizing constant-temperature water bearing stratum |
| CN202690107U (en) * | 2012-08-06 | 2013-01-23 | 中国矿业大学 | Movable-type ice-water spray cooling apparatus for tunneling working face |
| CN206538807U (en) * | 2017-02-23 | 2017-10-03 | 淮南矿业(集团)有限责任公司 | A kind of mining TBM water circulation systems |
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