CN103353167A - Saving-type electric heating and heat supply device with low heating power - Google Patents
Saving-type electric heating and heat supply device with low heating power Download PDFInfo
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- CN103353167A CN103353167A CN 201310315831 CN201310315831A CN103353167A CN 103353167 A CN103353167 A CN 103353167A CN 201310315831 CN201310315831 CN 201310315831 CN 201310315831 A CN201310315831 A CN 201310315831A CN 103353167 A CN103353167 A CN 103353167A
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Abstract
The invention discloses a saving-type electric heating and heat supply device with low heating power. The saving-type electric heating and heat supply device comprises a box body, a heat preservation and insulation layer, a large number of heat storage balls and electric heaters, and a hot air flow controller. The heat preservation and insulation layer is arranged on the inner side of the box body. Heat storage ball layers and the electric heaters are sequentially arranged vertically or horizontally in the box body. The hot air flow controller is arranged at a heat supply air outlet. The saving-type electric heating and heat supply device can meet high heating requirements at low heating power. For example, 6 hours of preheating and heat storage or 24 kilowatt hours of heat storage can be realized at the power of 4 kilowatts; if heat is supplied within one hour of working time and the heating power is 4 kilowatts at the time of heat supply, the saving-type electric heating and heat supply device with the low heating power is tantamount to a 28-kilowatt electric heating and heat supply device, and the heating power is lowered by 85.7% compared with 28-kilowatt heating power.
Description
Technical field
the present invention relates to the heat supply process field, the electrical heating heating plant of especially low heating power.
Background technology
the patent application that publication number is CN2482650, a kind of static heat storing type electric heater is proposed, it is at many heating rods of the interior vertical array of a case 1, the both sides of this heating rod 2 paste to build has the high temperature resistant limit to reach the heat storage brick body of 1600 ℃, so that heat is stored, the top of case is provided with air outlet, and by its openings of sizes of movable airdoor control or close, the bottom of case is provided with air inlet.Can take full advantage of the valley electricity heating that price is low, heat is stored, open air door while needing, heat is emitted, to the room air heating, can greatly save the electricity charge.
in its tangible industrial and agricultural production electricity consumption, the situation that electrical network can not be loaded often appears.Or the main line electrical network can not be loaded or user's oneself distribution capacity is inadequate.As in Tea Production, comprehensively do blue or green and complete, vegetable or flower produce in booth heat supply during the cold current invasion and attack.In new district, Wuyi, the north of Fujian Province, because the problem of electrical network and enterprise self distribution capacity always has 70,000 five thousand comprehensive greening machines and 30,000 green-keeping machines at present still with making charcoal and burning the bavin heat supply, destroy forest, contaminated environment.During vegetable or flower is produced, multilayer greenhouse cost is high, does not adopt the producer of multilayer greenhouse structure, when cold current is attacked, does not have heating facility to sit back and wait disaster-stricken.Can not sit back and wait in production that distribution improves.If can develop the electrical heating heating plant that low heating power can meet again heat supply heat requirement in production, just can solve this stubborn problem.
but disclosed technical scheme is to meet specification requirement in above-mentioned application, and reason is
the static heat storing type electric heater of this structure, adopt and to paste the heat storage brick heat accumulation in the heating rod both sides, and the available heat exchange area is little, very slow for thermal velocity, for domestic heating still can, can not meet in industrial and agricultural production the fireballing requirement of the large heat supply of heating load.
Summary of the invention
the purpose of this invention is to provide the electrical heating heating plant that a kind of low heating power can meet again heat supply heat requirement in industrial and agricultural production, the technical scheme adopted is, the economizing type electrical heating heating plant of low heating power, it is characterized in that: comprise casing, the thermal insulation separation thermosphere, a large amount of heat accumulation balls and electric heater (or heating heat storing plate of heat accumulation and electrical heating integral structure), the hot air flow controller, box inside arranges the thermal insulation separation thermosphere, in casing, heat accumulation ball layer and electric heater vertically or laterally are arranged in order (or the heating heat storing plate of heat accumulation and electrical heating integral structure is arranged in order).The present invention can adopt two kinds of structures: the one, and vertical structure, the heat supply air outlet is arranged on casing top one side, and air inlet is arranged on bottom half, and at the heavy support of bottom device heat accumulation ball-joint of casing, casing is arranged on base; The 2nd, horizontal type structure, the heat supply air outlet is arranged on a side, and air inlet is in the opposite side bottom.Described thermal insulation separation thermosphere adopts double-decker, outer is that aluminosilicate fiberboard, internal layer are aluminate cement and pearlite concrete plate, this structure can be saved metal inner tube, avoids complete machine to form heat bridge, also can reduce the temperature with aluminosilicate fiberboard thermal insulation layer contact-making surface.It during heat supply, is the control hot air flow, the economizing type electrical heating heating plant of the low heating power of above-mentioned two kinds of structures, all at the heat supply air outlet, the hot air flow controller is set, the structure of described hot air flow controller is: it is biparting shape blade construction, a slice sector is fixed, another sheet sector can rotate under bimetallic element drives, rotating sector is fixed on supporting seat, bimetallic element is nested on the connecting rod that an end is welded on supporting seat, one end device of connecting rod is on bearing, bearing is fixed by supporting seat, during variations in temperature, bimetallic element drives the sector rotation, control air output size.
the economizing type electrical heating heating plant of the low heating power of said structure, adopt the accumulation of heat of heat accumulation ball, the heat accumulation ball has large specific area, and rate of heat exchange is fast, can meet the heat request that supplies in industrial and agricultural production, the new design of body structure is the particular requirement in industrial and agricultural production.
the economizing type electrical heating heating plant of this low heating power, just can meet with little heating power the large heat request that supplies.As 6 hours heat accumulation 24 kilowatt hours of the power preheating heat accumulation with 4 kilowatts, in the heat supply of a hour working time, during heat supply, heating power is 4 kilowatts, the economizing type electrical heating heating plant that should hang down heating power is equivalent to 28 kilowatts of electrical heating heaters, with 28 kilowatts of heating powers, compare, heating power has reduced by 85.7%, always have 70,000 five thousand comprehensive greening machines in new district, Wuyi, the north of Fujian Province, 20 kilowatts of every direct electrical heating heating powers, if adopt direct electrical heating heat supply, must increase by 1500000 kilowatts of total distribution power, be equivalent to install additional the distribution transformer of 1500 1000 kilowatts, need to increase by 7.5 hundred million yuan of investments, annual line loss expends 3,975 ten thousand yuan of the electricity charge more.And adopt the technology of the present invention to complete the comprehensive greening machine transformation of making charcoal of 7.5 ten thousand, new district, Wuyi, the north of Fujian Province, substantially can not change distribution, can be society and save 7.5 hundred million yuan of investments, more than 3,900 ten thousand yuan of annual minimizing distribution line electric energy losses, economic results in society are very remarkable.In large-area vegetable or flower booth and other heat demand, effect is so same.
the present invention is changed to the effect of carbon in changing bavin in new district, Wuyi, on-site the north of Fujian Province, two legacy ground, Wuyi Mountain, fujian world Tea Production to be elaborated:
1, in the scope of new district, Wuyi, the north of Fujian Province, Tea Production changes the major technique obstacle that bavin changes carbon.
new district, Wuyi oolong tea and black tea manufacture, along with the variation of production environment and the raising of labor cost, in production, corresponding variation has also appearred in power consumption mode and centrostigma.The combustion bavin is made charcoal seriously to be present in and is done blue or green and (comprising black tea manufacture) two links that complete.Make charcoal in the first drying processed link of leaking water that efficiency is low, cost is high, most of tea enterprise is used dryer, take coal or oil as fuel, the charcoal fire heating that can promote tea leaf quality to promote seldom employing on the contrary.
the first, do blue or green link and rely on the heat supply basic reason of making charcoal
doing green grass or young crops is the critical process that forms the mellow quality of oolong tea fragrance.The leading equipment that Fujian Province applies at present on producing is the drum-type green making machine, main model has 6CZ-2-100 type, 6CZ-92-120 type etc., these are all the products of the 1970s and 1980s in 20th century, model the earliest just is applied in shakes on blue or green cool green grass or young crops, there is no large variation on product structure, but title is because of the expansion generation respective change of its function.
it is time-consuming that the cool blue or green beach leaf that withers turns over leaf, take up room very large, along with labor cost improve and production site more and more nervous, solar wither ratio in the north of Fujian Province oolong tea is produced is fewer and feweri; The north of Fujian Province Changes in weather in spring is large in addition, spring tea cloudy day rainy day in season is many, the tea enterprise large except minority adopts tea leaf tedder and withering trough to wither, the medium and small tea enterprise operation of withering generally all is placed on green making machine and completes, the withering of employing time and labour saving, oolong bitter edible plant producing region, the north of Fujian Province shaken the integral type of drying in the air and done green grass or young crops, withers, shakes green grass or young crops, air blue and all carry out in green making machine.Now the south of Fujian Province Cha Qu spring tea produces also and is changing the cool traditional processing mode split that shakes, and adopts withering of time and labour saving more to shake the integral type of drying in the air and does green grass or young crops.Therefore these type green making machines also are called comprehensive greening machine now, on performance, have to wither, cool green grass or young crops, shake blue or green three kinds of effects.Heat-supplying mode adopts at air inlet and places braziers, or at air inlet, electric heater unit is set, and withers for hot blast, or does heating of blue or green process.
according to incompletely statistics, at tea district, new district, Wuyi comprehensive greening machine, using the ratio of braziers heat supply surprisingly high, is substantially all to use the braziers heat supply.The braziers heat supply accounts for and accounts for altogether 75000 (incomplete statistics data) more than 99% of comprehensive greening machine recoverable amount, there is no and adopts clean Electric heating or other clean energy resourcies.Cause the basic reason of this situation to be:
comprehensive greening machine is in blowing hot-air withers operation, because intake is large, wither temperature requirement 32-40 degree centigrade (University Of Agriculture and Forestry In Fujian and Wuyishan City immortality rock tea processing factory " foundation and the enforcement of Wuyi cliff tea preliminary working standard practice instructions "), require very high to the heat supply heat.The north of Fujian Province spring tea produces season, and the low Changes in weather of temperature is large, and cloudy day rainy day is many, compares the south of Fujian Province Cha Qu higher to the requirement of heat supply heat peak value.In oolong tea producing region, the north of Fujian Province, adopt the electrical heating heat supply, throw the comprehensive greening machine that the leaf amount is 180 kilograms of left and right, the configuration of separate unit peak power will be 20 kilowatts of left and right.Completing a green grass or young crops, to do blue or green process time long, and production efficiency is lower, so each Enterprise Integrated green making machine quantity is equipped with very greatly, and it is all upper and lower at the 20-30 platform that general medium-scale tea enterprise is equipped with quantity.As Wuyishan City tea, there are 60 of comprehensive greening machines in enterprise, the tea of scale is looked forward to like this, and only comprehensive greening machine electrical heating electric power configures just more than 1300 kilowatts, and its supply transformer capacity only has 400 kilowatts, use electrical heating to do green grass or young crops, carry out large-scale redevelopment to distribution.
the second, the link that completes still selects to burn bavin heat supply reason
complete and also claim fried green.Purpose is to utilize high temperature to destroy and do the enzymatic activity in leafiness rapidly, fixedly does blue or green quality, distributes part moisture, removes the green grass gas in " leafiness " by the heat chemistry effect simultaneously, and development fragrance.The red pot of mistake in black tea manufacture operation also will be used green-keeping machine.Equipment kind and the model of completing at present is a lot, and the energy consumption mode is also varied.
because complete, link production efficiency is high, and the relative green making machine of tea enterprise green-keeping machine configuration quantity still less, is looked forward to large-scale tea, and it is not the principal element of considering that peak power is impacted electrical network.But make one's options from the contrasts such as cost, energy consumption cost, simplified control.Most of tea enterprises and specialist are in the early stage of development, general selection is exactly to fire firewood stove formula green-keeping machine, and the fact is also so, and the Wuyi cliff tea producing region is originally in the green-keeping machine configuration, except only a few tea enterprise is used combustion gas green-keeping machine, fuel oil green-keeping machine, cooking stove type combustion bavin green-keeping machine is the first-selection that medium and small tea is looked forward to.In the scope of new district, Wuyi, the bavin of cooking stove type combustion now green-keeping machine is possessed ratio and is approached more than 95% according to incompletely statistics.The expected rapid growth of oil gas price, will allow the tealeaves producer give up original combustion bavin green-keeping machine now simultaneously, and it is very difficult purchasing new green-keeping machine, unless the very alternative transformation way of simple economy arranged.
in sum, solve under the Rural Areas at Present network load, Tea Production is comprehensively done green grass or young crops, the link that completes is used clean energy resource---electric energy, or uses other energy that can substitute charcoal fire and fuel wood, is the current problem in the urgent need to address in tealeaves producing region, new district, Wuyi.
key technology breaks through.
the previous round projects to upgrade rural power grids complete, and the distribution general layout basically forms, and most tealeaves is concentrated processing district net capacity deficiency; A lot of too small, set distribution facility capacity of Tea Processing scope of the enterprise are very little, all cause the heating electric of can't direct load comprehensively doing green grass or young crops, completing.As the densely covered ，Cao Dun of Wuyishan City rock tea village school large-scale production enterprise village is also like this.With regard to the rural area of large tracts of land distribution tea enterprise, the Tea Production seasonality is very strong, concentrates on a wheat harvesting period every year, and having formed distribution does not all have to require configuration according to the peak power of Tea Production short-term.As the emerging Tian Town hole little Ying of Yan Cha specialist has 20 comprehensive greening machines, electrical heating is comprehensively done blue or green lowest power and is needed 500 kilowatts, 200 kilowatts of transformer capacities.Most typical example Shi Yancha village repeatedly installs transformer additional, and there is comprehensive greening machine in 1600 kilowatts of ，Quan villages of existing four transformer total capacities more than 1000, and electrical heating is comprehensively done blue or green lowest power more than 18000 kilowatts, and total capacity and demand differ more than 10 times.The current distribution in Yan Cha village does not say that meeting electrical heating comprehensively does green grass or young crops, is exactly that the power electricity consumption is all very nervous.
it is current by tea is looked forward todistribution engineering
transformation solves the combustion bavin of industry in the producing problem of making charcoal, the very large difficulty existed: comprehensively doing green grass or young crops, while completing the electricity consumption peak value, general area Tea Production electric power in season is large several times than usual, and the Tea Processing concentration zones is several times of greatly to 10 than usual.And no matter at village level electrical network can't bear the heavy load, be exactly the good region of electrical network condition, also because carry outthe distribution dilatation
transformationengineering
have high input, difficulty is large, it is very low that enterprise is transformed enthusiasm.Simultaneously, Tea Production is seasonal strong, high-power distribution only short-term use and the most of the time idle, open circuit loss and load loss are all very large, overburden for business economic, overwhelming majority manufacturing enterprise means, is not solve by the mode of distribution being carried out to the secondary transformation problem that the combustion bavin is made charcoal.Obviously within a very long period, this approach is impracticable.
thereby by innovation technically, research and develop the low-power peak electric-heating technology be complementary with current electrical network configuration, to existingly comprehensively doing green grass or young crops, the equipment that completes effectively improves, and is that the Tea Production bavin changes the approach that realizes that electrical carbon changes electric unique reality.Can substantially not changing under the condition of distribution of the technology of the present invention realizes the carbon of comprehensive greening machine and green-keeping machine is changed to electricity, Chai Gai electricity simultaneously.
(1), the transformation of comprehensive greening machine: configure the economizing type electrical heating heating plant of low heating power of the present invention on the basis of original drum-type green making machine, can realize the low heating power electrical heating transformation of comprehensive greening machine.This technical scheme can solve the excessive problem of drum-type green making machine electrical heating power peak value, effectively reduces heating peak power 50% to 85%, substantially can the distribution of existing most of enterprise, specialist not transformed.This is in the quite long period, realizes the technological approaches of unique reality that comprehensive greening machine carbon changes.This technical scheme can not only effectively realize the carbon that changes of comprehensive greening machine under current distribution condition, and other modes relatively have small investment, instant effect, good energy-conserving effect, tremendous economic and environment protection significance that pollution is few.
be analyzed as follows: 7.5 ten thousand left and right of tealeaves comprehensive greening machine recoverable amount, new district, Wuyi, if adopt direct Electric heating transformation, 20 kilowatts of every comprehensive greening machine heating powers, install the electric heater investment of 20 kilowatts additional, with installing additional, the heterogeneous pyrogenicity heat conduction thermal store with conventional thermal output and two kinds of thermal output functions of explosion type thermal output is suitable.But must increase by 1500000 kilowatts of total distribution power, be equivalent to install additional the distribution transformer of 1500 1000 kilowatts, need to increase by 7.5 hundred million yuan of investments, 3,975 ten thousand yuan of annual many losses electricity charge.
basis: various capacity transformer transformation input, open circuit loss and load loss tables
the domestic SGL type l power transformer of take is example
(produce and press one and a half months calculating, 0.9 yuan of every degree of the electricity charge season)
(2) transformation of combustion bavin green-keeping machine.The economizing type electrical heating heating plant of the large low heating power of the present invention of configuration thermal capacity on the basis of original drum-type green making machine just makes original comprehensive greening machine possess the function of green-keeping machine simultaneously, and without the configuration equipment that completes separately again.With additive method, existing at least two ten thousand the burning bavin green-keeping machines in the scope of new district, Wuyi are transformed, by average 40,000 yuan of calculating of every novel green-keeping machine, at least will be dropped into 800,000,000 yuan.Not only can effectively realize burning in this way the transformation of bavin green-keeping machine, can directly ban and burn bavin formula green-keeping machine, compare with other modes and at least can save 800,000,000 yuan of investments.
The accompanying drawing explanation
fig. 1 is a kind of economizing type electrical heating heating plant stereogram of low heating power of vertical structure;
fig. 2 is that the economizing type electrical heating heating plant of the low heating power of another kind of vertical structure axially dissects along the heat supply air outlet.
in figure, 1,5,6 are box component (wherein 1 is casing, the 5th, casing top case lid, the 6th, the case lid of heat supply air-out oral area); 2 are arranged on the thermal insulation separation thermosphere, the 3rd of box inside, electric heater, the 4th, heat accumulation ball, the 7th, fixing sector, the 8th, rotating sector, the 9th, bimetallic element, the 10th, bottom half support bracket, the 11st, cabinet base, the 12nd, heat supply air outlet.
The specific embodiment
the economizing type electrical heating heating plant of the low heating power of the vertical structure as shown in accompanying drawing 1,2, comprise casing (1), thermal insulation separation thermosphere (2), a large amount of heat accumulation ball (4), electric heater (3), hot air flow controller, casing (1) inboard is thermal insulation separation thermosphere (2), and casing (1) interior heat accumulation ball layer (4) and electric heater (3) vertically or laterally are arranged in order.Heat supply air outlet (12) is arranged on casing (1) top one side, and air inlet is arranged on casing (1) bottom, and at the heavy support (10) of bottom device heat accumulation ball-joint of casing (1), casing (1) is arranged on base (11); Described thermal insulation separation thermosphere (2) adopts double-decker, and outer is that aluminosilicate fiberboard, internal layer are aluminate cement and pearlite concrete plate; Heat supply air outlet (12) arranges the hot air flow controller, the structure of described hot air flow controller is: it is biparting shape blade construction, a slice sector (7) is fixing, another sheet sector (8) can rotate under bimetallic element (9) drives, rotating sector (8) is fixed on supporting seat, bimetallic element is nested on the connecting rod that an end is welded on supporting seat, one end device of connecting rod is on bearing, bearing is fixed by supporting seat, during variations in temperature, bimetallic element drives the sector rotation, controls the air output size.Electric cabinet (13) device is on casing top.
the economizing type electrical heating heating plant of the low heating power of said structure, also can adopt the heating heat storing plate of heat accumulation and electrical heating integral structure, and in described casing, the heating heat storing plate of heat accumulation and electrical heating integral structure is once arranged.For increasing heat exchange area, two surfaces of described heating heat storing plate are concaveconvex structure, and described heating heat storing plate is the high temperature resistant conducting concrete plate of electric pyrogenicity, and conductive phase is graphite and metallic fiber.
casing of the present invention also can be horizontal type structure, the economizing type electrical heating heating plant of the low heating power that casing is horizontal type structure, its heat supply air outlet (12) is arranged on a side, air inlet is arranged on casing opposite side bottom, and other structures are identical with the economizing type electrical heating heating plant structure of the low heating power of vertical structure.
Claims (7)
1. hang down the economizing type electrical heating heating plant of heating power, it is characterized in that: comprise casing (1), thermal insulation separation thermosphere (2), a large amount of heat accumulation ball (4), electric heater (3), hot air flow controller, casing (1) inboard arranges thermal insulation separation thermosphere (2), casing (1) interior heat accumulation ball layer (4) and electric heater (3) vertically or laterally are arranged in order or the heating heat storing plate of heat accumulation and electrical heating integral structure is arranged in order, and at heat supply air outlet (12), the hot air flow controller are set.
2. the economizing type electrical heating heating plant of low heating power according to claim 1, it is characterized in that: described hot air flow controller is biparting shape blade construction, a slice sector (7) is fixing, and another sheet sector (8) can rotate under bimetallic element (9) drives.
3. the economizing type electrical heating heating plant of low heating power according to claim 1, it is characterized in that: the heating heat storing plate of described heat accumulation and electrical heating integral structure is the high temperature resistant conducting concrete plate of electric pyrogenicity, and conductive phase is graphite and metallic fiber; Its two surface is concaveconvex structure.
4. according to the economizing type electrical heating heating plant of claim 2 or 3 described low heating powers, its casing is horizontal type structure, and heat supply air outlet (12) is arranged on a side, and air inlet is arranged on casing opposite side bottom.
5. obtain the economizing type electrical heating heating plant of 3 described low heating powers according to claim 2, it is characterized in that: described casing is vertical structure, case lid (6) by casing (1), casing top case lid (5), heat supply air-out oral area forms, the bottom device support bracket (10) of casing (1), casing (1) is arranged on base (11).
6. want the economizing type electrical heating heating plant of 5 described low heating powers according to right, it is characterized in that: described heat supply air outlet (12) is arranged on casing (1) top one side, and air inlet is arranged on casing (1) bottom.
7. the economizing type electrical heating heating plant of low heating power according to claim 6 is characterized in that: described thermal insulation separation thermosphere (2) adopts double-decker, outer for aluminosilicate fiberboard, internal layer be aluminate cement and pearlite concrete plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310315831 CN103353167A (en) | 2013-05-27 | 2013-07-25 | Saving-type electric heating and heat supply device with low heating power |
| CN201410011920.3A CN103791613B (en) | 2013-05-27 | 2014-01-12 | Low-power heats the economizing type heating plant of high-power heat supply |
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| CN201310200661 | 2013-05-27 | ||
| CN201310200661.4 | 2013-05-27 | ||
| CN 201310315831 CN103353167A (en) | 2013-05-27 | 2013-07-25 | Saving-type electric heating and heat supply device with low heating power |
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| CN103353167A true CN103353167A (en) | 2013-10-16 |
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| CN 201310315831 Pending CN103353167A (en) | 2013-05-27 | 2013-07-25 | Saving-type electric heating and heat supply device with low heating power |
| CN201410011920.3A Expired - Fee Related CN103791613B (en) | 2013-05-27 | 2014-01-12 | Low-power heats the economizing type heating plant of high-power heat supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111515588A (en) * | 2020-05-18 | 2020-08-11 | 天地科技股份有限公司 | Online dehydrogenation device for hydraulic support welding |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106225459A (en) * | 2016-06-21 | 2016-12-14 | 李韵奇 | The charcoal that cleans of heat accumulation and combustion intensity buffering method heats heat supply machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5931636A (en) * | 1997-08-28 | 1999-08-03 | General Electric Company | Variable area turbine nozzle |
| CN2482650Y (en) * | 2001-04-30 | 2002-03-20 | 易继先 | Electric heater |
| CN201129952Y (en) * | 2007-08-31 | 2008-10-08 | 黄立维 | Heat storage ball type phase-change material heat storage apparatus |
| KR20090093054A (en) * | 2008-02-28 | 2009-09-02 | 김영택 | Hot air generator |
| CN201273694Y (en) * | 2008-07-28 | 2009-07-15 | 廖岳威 | Cyclic indoor air convection type electric heater |
| CN202638148U (en) * | 2012-06-19 | 2013-01-02 | 禹熙润 | Dust remover |
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2013
- 2013-07-25 CN CN 201310315831 patent/CN103353167A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111515588A (en) * | 2020-05-18 | 2020-08-11 | 天地科技股份有限公司 | Online dehydrogenation device for hydraulic support welding |
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| CN103791613A (en) | 2014-05-14 |
| CN103791613B (en) | 2019-04-26 |
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Application publication date: 20131016 |