CN201289334Y - Top-and-bottom push-and-pull connection metal antifreeze door for cooling tower - Google Patents
Top-and-bottom push-and-pull connection metal antifreeze door for cooling tower Download PDFInfo
- Publication number
- CN201289334Y CN201289334Y CNU2008201787669U CN200820178766U CN201289334Y CN 201289334 Y CN201289334 Y CN 201289334Y CN U2008201787669 U CNU2008201787669 U CN U2008201787669U CN 200820178766 U CN200820178766 U CN 200820178766U CN 201289334 Y CN201289334 Y CN 201289334Y
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- cooling tower
- door
- antifreeze
- column
- barrel
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Abstract
The utility model provides a vertical-pushing flexible-connected metal antifreezing door of a cooling tower; the cooling tower is supported through an inclined strut; the bottom end of the cooling tower is fixed on a ring foundation; a water collecting basin is positioned at the bottom end of the cooling tower; a support structure surrounding the cooling tower is arranged at the ring foundation; the support structure consists of a plurality of groups of frames; each group of frame consists of a pair of upright posts, a circumferential support beam, a pair of radial support beams and a circumferential coupling beam; the upright posts are fixed on the ring foundation; one end of each radial support beam is fixed at the lower end of a cylinder wall, and the other end thereof is fixedly connected with the top ends of the upright posts; the circumferential support beam is arranged between each pair of upright posts and positioned at the top ends of the upright posts; the circumferential coupling beam is arranged between each pair of upright posts and positioned at the lower ends of the upright posts; a close board covers the part between each pair of radial support beams; the antifreezing door running along a track is arranged in each group of frames; the track is arranged at the upright posts of each group of frames and extends upward to the bottom end of the cylinder wall along the radial support beams; and the open and the close of the door are controlled through a switch device. Through the frame structure and the antifreezing door structure, the cooling tower can effectively achieve antifreezing, anti-noise and wind guiding functions of the towel.
Description
Technical field
The utility model relates to antifreeze, noise control, the wind-guiding equipment that is applied in the reverse-flow cooling stack of armored concrete, refers in particular to a kind of antifreeze door of metal of freely opening and closing in the cooling tower of being applied to.
Background technology
The maximum form of temperature use that thermal power plant recirculated water cools off needs is to adopt the reverse-flow cooling stack of armored concrete (hereinafter to be referred as reverse-flow tower), please in conjunction with Fig. 1～Fig. 4, reverse-flow tower is circular in the plane, at meridian to being hyperbola, because heat exchange is to lean on into that the cold air of tower carries out, so the hyperbola bottom is not an entity, it is the armored concrete hyperbola housing that is much supporting top with the reinforced column of the regular arrangement at two-way inclination angle, be interlinked to the outside in making, this position is called air inlet, reinforced column with the regular arrangement at two-way inclination angle generally abbreviates inclined strut as, because a pair of inclined strut 15 is Chinese " people " font, is also referred to as " people " word post in China.The cold air that needs in the tower just passes inclined strut at the air inlet place and enters in the tower, and the refrigerating function of cooling tower is that the collecting-tank that makes the water that enters the tower internal upper part pass packing inflow cooling tower bottom is from top to bottom finished.Water surface B in the collecting-tank 3 maintains an equal level mutually with ground A generally speaking, or is lower than ground A.The position of packing in tower is the top at the air inlet upper limb, be referred to as tail water from the packing bottom to the water droplet string the collecting-tank, the space at the reverse-flow tower tail water place of northern area is the cooling tower space that may freeze just, the position that freezes is on the top in this space, promptly around the following and whole inclined struts in packing bottom.
The antifreeze problem of the reverse-flow tower of northern area is never effectively solved for a long time, under the pressure of the harm that winter, bad weather condition caused to cooling tower, have to take some interim measures to prevent freezed in winter, some steel pipes 13 are installed on the hoop of paired inclined strut 2, on steel pipe 13, hang fiberglass deep bead 14, because the suspension plate fabrication error is very big, yielding, be difficult to guarantee tightness, can not effectively prevent freezed in winter, some the time plate returned plant area by flying up of big wind and cause unsafe factor.Owing to hang and dismantlement work operation difficulty relatively, generally be to go into the winter first year to hang up before, remove spring next year, can not use flexibly according to meteorological condition, more can not deal with the harm that the cold current of burst causes.Especially tower suspension and the disassembling section that is arranged in the collecting-tank for inclined strut is difficult especially, the smaller cooling tower air inlet height that often uses is also more than 4.0m at present, on the water surface, hang and dismantle and undertaken by special vessel possibly, otherwise will take cripple and springboard, increase operating cost virtually.This fiberglass deep bead is made very simple and easy, and reusability is poor, generally loses 20%～30% after using a winter, must just prepare standby in the incipient stage, has increased initial investment and usual operating cost.The fiberglass deep bead need be placed in the warehouse in non-operational phase, standby fiberglass deep bead just need be placed in the warehouse at ordinary times, therefore also must be near tower construction deep bead storehouse, taken the ventilation that plant area's area also might influence cooling tower, increased initial investment again.
Bigger a period of time of wind speed often appears in certain areas, strong wind the tail water of the both sides of the edge of wind direction vertical component tower is blown through and stripping tower outside, be commonly referred to as beam wind, beam wind can work the mischief to cooling tower and peripheral facilities, especially in the winter time may cause ice trouble, for example the extension icing, electric wire of road is iced, the cooling tower inclined strut freezes etc.In order to address this problem, some tower has been made wind deflector in air inlet, see also Fig. 9, in tower, set up horizontal trickle truss beam 16 and trickle framework post 17 longitudinally in advance, wind deflector 18 is installed between trickle truss beam 16 and the trickle framework post 17, what the material of wind deflector had armored concrete also has other material, because the factors such as layout of tower inner concrete framework, the suspension of wind deflector is difficulty relatively, and because inclined strut is oblique, wind deflector can not solve the up and down problem that blown through of semidiameter part of inclined strut, can't really stop the problem of beam wind.
Mentioned important schedule along with the reinforcement of environmental protection consciousness prevents the problem of noise pollution in recent years, the water droplet noise of counterflow cooling tower is the insoluble problem in thermal power plant always, and heavy economic cost is all paid in some power plants every year for this reason.The water droplet noise is that water sends to the collecting-tank surface from packing bottom freely falling body, the big more tail Gao Yueda of cooling tower scale, the big more level of noise of tail height is also just big more, generally the water droplet level of noise of surveying in the standard point of tower is greatly more than 85dB, the water droplet noise is a broad-band noise, probably at 800H
Z～4000H
ZScope and about, on this structures of cooling tower, reduce or eliminate its relatively difficulty, but also be that people are long-expected, the solution that abroad provides at present is stifled, the domestic solution that provides is to fall.Stifled way is exactly to keep off make an uproar wall at the very near circle of building of distance tower on every side, this way has also been paid great cost abroad, one in the medium of nature cooling tower heat exchange is that one of heat is an air, the area of cooling tower calculates with temperature difference and ventilation, ventilation is to lean on the area of air inlet to guarantee, if near air inlet, build a wall, although this wall still can the permeation parts air, but after all increased very big resistance, in fact in the unit interval, reduced ventilation, so just do not reach the cooling effect when not having retaining to make an uproar wall, have to remedy by other way, for example take to increase the way of the height or the trickle area (being the area of tower) of cooling tower ventilator, increased a large amount of initial investments and operating cost.
The domestic solution that provides is a noise reduction, promptly on the water surface, lay one deck both can be floating also can noise reduction material, this material can be software also can be hard, owing to the reason of material itself and the laying scheme of more complicated, insoluble some consequence of bringing after laying in addition, the way of noise reduction neither one tower to this day adopt.Keeping off the wall of making an uproar also keeps off its outside the way of domestic employing with the cost of its great number, still rest in theory so present domestic cooling tower reduces the problem of water droplet noise, be starved of and a kind ofly not only invested not high but also can reduce or stop that the way of all or part of water droplet noise of cooling tower breaks this situation.
In sum, problems of the prior art mainly concentrate on following some:
1, is difficult to guarantee tightness that still can not effectively prevent the cooling tower freezed in winter, also might wind blownly fly up to plant area's miscellaneous equipment or personnel when wind-force is too big increases unsafe factor owing to hang fiberglass deep bead technology.
2, the fiberglass deep bead hangs and the disassembling section difficulty, more difficult for the tower operation of inclined strut in collecting-tank, possibly by special vessel or take cripple and springboard hangs and dismantles, can not use flexibly according to the variation of meteorological condition at any time, more can not deal with the harm that the cold current of burst causes.
3, fiberglass deep bead manufacture craft is simple and easy, yielding and damage, and reusability is poor, and general annual loss 20%～30% must just be prepared standby in the incipient stage, has increased initial investment and usual operating cost.
4, fiberglass deep bead (comprising standby) need be placed in the warehouse in non-operational phase, therefore also must be near tower construction deep bead storehouse, taken plant area's area, influence the cooling tower ventilation, increased investment.
5, the fiberglass deep bead of this form does not consider to reduce the effect of water droplet noise.
The utility model content
The utility model purpose is to solve antifreeze, the windproof and noise reduction mail topic of cooling tower.
A kind of cooling tower of the utility model push-and-pull up and down connects the antifreeze door of metal by the emperor himself, cooling tower barrel air inlet end has some to supporting the inclined strut with the regular arrangement at two-way inclination angle of barrel, the barrel lower end is fixed in the inclined strut upper end, the bottom is fixed on the ring foundation, collecting-tank is positioned at the cooling tower bottom, ring foundation is provided with around the cooling tower supporting construction in one week, this supporting construction is made up of some framings, and every framing is made up of a column, a hoop brace summer, a pair of radial support beam and a hoop coupling beam; This column is fixed on the ring foundation, and radial support beam one end is fixed in the barrel lower end, and the other end is fixedlyed connected with the column top; Between every column and be positioned at the column top and be provided with the hoop brace summer; Between every column and be arranged in the column lower end hoop coupling beam is set; Every pair radially is covered with shrouding between the brace summer; Be provided with the antifreeze door that is provided with along track in every framing, track is arranged on the column at every framing two ends, and radially brace summer extends bottom upward to barrel, by the keying of headstock gear control gate;
Hoop coupling beam place is located in described track bottom, upwards adopts the certain radian bending to be connected with shrouding, extends to the barrel bottom along the shrouding surface again, is forming the certain radian bending near the barrel place, and final and barrel bottom is fixed.
The beneficial effects of the utility model are: the utility model with cooling tower antifreezing equipment from provisional be converted into permanent, be converted into standardization from simplification, when solving antifreeze problem emphatically the consideration that combines of wind-guiding problem, but also play the reduction function of noise, obtain the effect of killing three birds with one stone.
Description of drawings
Fig. 1 is the floor plan of used for cooling tower deep bead in the prior art;
Fig. 2 is the front view of used for cooling tower deep bead in the prior art;
Fig. 3 is the side view of deep bead when the cooling tower inclined strut is outside collecting-tank in the prior art;
Fig. 4 is the side view of deep bead when the cooling tower inclined strut is in collecting-tank in the prior art;
Fig. 5 is the floor plan of the utility model cooling tower inclined strut antifreeze door outside collecting-tank the time;
Fig. 6 is the floor plan of the utility model cooling tower inclined strut antifreeze door in collecting-tank the time;
Fig. 7 is the cutaway view of the utility model cooling tower inclined strut 2-2 direction outside collecting-tank the time;
Fig. 8 is the cutaway view of the utility model cooling tower inclined strut 2-2 direction in collecting-tank the time;
Fig. 9 is the structural representation that hangs wind deflector in the prior art in the cooling tower;
Figure 10 is the structural representation that hangs partition plate in the utility model cooling tower;
Figure 11 connects the front view of the antifreeze door of metal by the emperor himself for push-and-pull about the utility model cooling tower;
Figure 12 is the side view of the utility model cooling tower inclined strut antifreeze door outside collecting-tank the time;
Figure 13 is the side view of the utility model cooling tower inclined strut antifreeze door in collecting-tank the time;
Figure 14 connects the manual opening-closing device schematic diagram of the antifreeze door of metal by the emperor himself for push-and-pull about the utility model cooling tower;
The schematic diagram of Figure 15 noise diffusion when not adopting the antifreeze door of the utility model metal;
Figure 16 schematic diagram of noise diffusion but when not closing the antifreeze door of metal for adopting the antifreeze door of the utility model metal;
The schematic diagram of noise diffusion when Figure 17 closes the antifreeze door of metal for adopting the antifreeze door of the utility model metal.
[figure number explanation]
1 cooling tower barrel, 2 inclined struts
3 pool wall 4 ring foundations that catchment
5 columns, 6 hoop brace summers
7 radial support beams, 8 hoop coupling beams
Push-and-pull antifreeze door 91 tracks of admiring about in the of 9
92 collude hanging point 10 shroudings
11 manual opening-closing devices, 12 panel walls
13 steel pipes, 14 fiberglass deep beads
15 a pair of inclined strut 16 trickle framework posts
17 trickle truss beam, 18 wind deflectors
The A ground B water surface
The specific embodiment
Characteristics of the present utility model can be consulted the detailed description of the graphic and embodiment of this case and obtained to be well understood to.
The utility model with cooling tower antifreezing equipment from provisional be converted into permanent, be converted into standardization from simplification, the consideration that combines of wind-guiding problem, but also play the reduction function of noise when having solved antifreeze problem emphatically, obtain the effect of killing three birds with one stone.
Because, inclined strut all is oblique in three-dimensional three directions, so on inclined strut, hang relatively difficulty of fiberglass deep bead, cooling tower is huge structures, flat shape is circular, then the circumferential length increase was bigger when the diameter increase was very little, so the basic point of solution of the present utility model is controlled at radially in the armored concrete ring foundation width range, meridian is to the space slightly higher than air inlet.
Consider with the cooling tower body and with being connected of winterized equipment, and the factors such as permanent use of winterized equipment, the utility model adopts steel construction or reinforced concrete structure to do the supporting construction of winterized equipment.See also Fig. 5～Fig. 8, the ring foundation 4 of cooling tower bottom is provided with around the cooling tower supporting construction in one week, this supporting construction is made up of some frameworks, and every framing is made up of a column 5, a hoop brace summer 7, a pair of radial support beam 6 and a hoop coupling beam 8.Described inclined strut 2 can be arranged on and also can be arranged in the collecting-tank 3 outside the collecting-tank 3, and corresponding whole supporting construction also can be arranged in the outer or collecting-tank 3 of collecting-tank 3.Whole framework is taken root on ring foundation, mode with rim of a cup or pre-doweling, radial support beam 7 one ends are connected with column 5, the annular bracket in the other end and the cooling tower barrel 1 housing lower edge outside (not indicating among the figure) is connected, and its connected mode is fixing with the embedded iron parts welding for being placed directly on the annular bracket.Between every column 5 and be positioned at the column top and be provided with hoop brace summer 6, hoop brace summer 6 two ends on framework top all are placed on the bracket on upright of frame 5 tops fixing with the embedded iron parts welding.Between every column 5 and be arranged in the column lower end hoop coupling beam 8 is set, hoop coupling beam 8 two ends all are placed on the bracket at this position of frame pillar fixing with the embedded iron parts welding.Radial support beam 7 upper end covers are provided with shrouding 10, and an effect of shrouding is not allow the air in the whole space of framework to run away from top, and the air that guarantees this space is a lateral flow.Shrouding can adopt the precast rc slab structure, and shrouding back in place adopts the embedded iron parts welding fixing, adopts cement mortar structure seam then.Wherein, the hoop brace summer that is provided with between every pair of adjacent column and the every column is called a framing with the radial support beam that hoop coupling beam and every column are connected, and radial support beam and inclined strut that each column, column are connected are called a Pin framework.
See also Figure 10～Figure 13, be provided with in every framing along the push-and-pull up and down of track setting and admire antifreeze 9, the track of Pei Heing is arranged on the column 5 at every framing two ends with it, and radially brace summer 7 extends bottom upward to barrel 1, by the keying of headstock gear control gate.Wherein up and down the push-and-pull antifreeze door of admiring be the metallic door that is flexible coupling, and adopts the aluminium alloy manufacturing, and it can suitably alleviate the load of gate action on framework, can also prevent because often trickle makes an issuable corrosion.Because aluminium alloy is hard metal, the integral body of the antifreeze door of the utility model,, can move up and down along the track that certain radian is arranged but can not fold or collapse from physical exhaustion into a pile to flexibility is arranged but can not compress at meridian to being rigidity in level.Antifreeze door is that the double-layer aluminium alloy lath that a lot of length are identical, width is identical is formed, and the two ends of lath use the mode similar with bicycle chain to connect into the sheet of an integral body, are hollow between the double-layer aluminium alloy lath, can fill waterproof insulation material.The suitable height place of the pillar hoop side of every framing opening both sides begins attachment rail, adopting certain radian to bend to shrouding upward to the top joins, extend to tower barrel direction along the shrouding surface, join, extend upward certain-length along the barrel surface and get final product adopting certain radian to bend to barrel near the barrel place.Setting height(from bottom) is relevant with the size of door, decides according to the weather of locality.Also can according to the installation of hoop coupling beam place.The width of noting frame openings is bigger than one group of inclined strut projection Breadth Maximum, and the width of every group of track is identical, will with the similar mode of bicycle chain connect into whole sheet the door be installed on the above-mentioned track, badge is lived in certain position in the middle of the track when door is in closed condition, does not allow the student sliding; Badge is lived in track end position when door is in opening, does not allow the student sliding during accident condition; Positive middle part is established and is colluded hanging point 92 in the lower end of door body, can adopt specific purpose tool that door is moved up and down; Bolt is established at lower edge two ends at the door body, and door is fixed on the door pillar; Differing heights is established the point of plurality of fixed bolt on door pillar, makes door can rest on several height.
Because it is fewer to open and close number of times, the metallic door that is flexible coupling adopts the artificial control that opens and closes, and sees also Figure 14, and it is the structural representation of manual opening-closing device.The metallic door that is flexible coupling can be closed to a certain degree according to weather forecast, consider that the icing position of cooling tower mainly is to begin downward development from the air inlet upper limb, and the needs of considering the cooling tower ventilation, door is not necessarily made totally-enclosed, specifically need be closed to what degree can determine according to the various computing of regional meteorological condition, this antifreeze door is provided with and colludes hanging point, and track is provided with holding division, and headstock gear is a manual draw bar.
Generally speaking the meridian of one group of inclined strut of cooling tower to the orthographic projection Breadth Maximum about 6.0m or bigger, the making material of the door of antifreeze, noise reduction, wind-guiding equipment should not be too thick, width should not be too big, so the opening of every framing not necessarily with inclined strut projection width correspondence, can determine voluntarily according to the material property of door, generally can take one group of inclined strut and two groups of door correspondences for attractive in appearance.
Another emphasis of the present utility model improves and is: cancelled and hung the mode that wind deflector is avoided beam wind in the tower, and be used between column 5, radial support beam 7 and the inclined strut 2 mode that hangs panel wall 12, please emphasis referring to Figure 10, can being arranged on as required on arbitrary Pin framework in the tower of this panel wall.Shutter frame has some groups, and every Pin framework all is a radial arrangement, and partition plate can be set in any direction, in the direction that strong wind often occurs partition plate is set more, with the strong wind guiding tower heart direction of any direction; Beam wind no longer appears.
The utility model has possessed simultaneously that prior art is unsolved to see also Figure 15～Figure 17 with low noise function, and it has very significantly presented the reduction effect that noise behind the utility model supporting construction and the shutter is installed.
In sum, that the utility model provides is antifreeze in a kind of extraordinary cooling tower, noise control, wind-guiding equipment, so offer the application of novel patent in accordance with the law; Technology contents of the present utility model and technical characterstic the sixth of the twelve Earthly Branches disclose as above, yet the personage who is familiar with this technology still may do various replacement and the modifications that do not deviate from this case utility model spirit based on announcement of the present utility model.Therefore, protection domain of the present utility model should be not limited to those disclosed embodiments, and should comprise various do not deviate from replacement of the present utility model and modifications, and is contained by following claim.
Claims (9)
1, push-and-pull connects the antifreeze door of metal by the emperor himself about a kind of cooling tower, cooling tower barrel air inlet end has some to supporting the inclined strut with the regular arrangement at two-way inclination angle of barrel, the barrel lower end is fixed in the inclined strut upper end, the bottom is fixed on the ring foundation, collecting-tank is positioned at the cooling tower bottom, it is characterized in that:
Ring foundation is provided with around the cooling tower supporting construction in one week, and this supporting construction is made up of some framings, and every framing is made up of a column, a hoop brace summer, a pair of radial support beam and a hoop coupling beam; This column is fixed on the ring foundation, and radial support beam one end is fixed in the barrel lower end, and the other end is fixedlyed connected with the column top; Between every column and be positioned at the column top and be provided with the hoop brace summer; Between every column and be arranged in the column lower end hoop coupling beam is set; Every pair radially is covered with shrouding between the brace summer; Be provided with Orbiting antifreeze door in every framing, track is arranged on the column at every framing two ends, and track radially brace summer extends bottom upward to barrel, by the keying of headstock gear control gate.
2, push-and-pull connects the antifreeze door of metal by the emperor himself about the cooling tower as claimed in claim 1, it is characterized in that: the pillar hoop side attachment rail of every framing opening both sides, adopting certain radian to bend to shrouding upward to the top joins, extend to tower barrel direction along the shrouding surface, join, extend upward certain-length adopting certain radian to bend to along the barrel surface with barrel near the barrel place.
3, cooling tower as claimed in claim 2 up and down push-and-pull connect the antifreeze door of metal by the emperor himself, it is characterized in that: described antifreeze door is that the double-layer aluminium alloy lath by some same widths and length combines, and each lath two ends is connected to integral body by chain.
4, push-and-pull connects the antifreeze door of metal by the emperor himself about the cooling tower as claimed in claim 3, it is characterized in that: this antifreeze door is provided with and colludes hanging point, and track is provided with holding division, and headstock gear is a manual draw bar.
5, push-and-pull connects the antifreeze door of metal by the emperor himself about the cooling tower as claimed in claim 4, it is characterized in that: be provided with panel wall between this column, radial support beam and the inclined strut.
6, push-and-pull connects the antifreeze door of metal by the emperor himself about the cooling tower as claimed in claim 5, it is characterized in that: be provided with insulation material between the described double-layer aluminium alloy lath.
7, push-and-pull connects the antifreeze door of metal by the emperor himself about the cooling tower as claimed in claim 6, and it is characterized in that: described framework is reinforced concrete structure.
8, push-and-pull connects the antifreeze door of metal by the emperor himself about the cooling tower as claimed in claim 7, and it is characterized in that: described panel wall is reinforced concrete structure.
9, push-and-pull connects the antifreeze door of metal by the emperor himself about the cooling tower as claimed in claim 8, it is characterized in that: described cooling tower inclined strut is arranged in the collecting-tank or is arranged on outside the collecting-tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201787669U CN201289334Y (en) | 2008-11-13 | 2008-11-13 | Top-and-bottom push-and-pull connection metal antifreeze door for cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201787669U CN201289334Y (en) | 2008-11-13 | 2008-11-13 | Top-and-bottom push-and-pull connection metal antifreeze door for cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201289334Y true CN201289334Y (en) | 2009-08-12 |
Family
ID=40981018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201787669U Expired - Lifetime CN201289334Y (en) | 2008-11-13 | 2008-11-13 | Top-and-bottom push-and-pull connection metal antifreeze door for cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201289334Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538504A (en) * | 2012-02-09 | 2012-07-04 | 辽宁赛沃斯节能技术有限公司 | Optimized energy-saving cold-preventing system and method at air inlet sides of cooling tower |
-
2008
- 2008-11-13 CN CNU2008201787669U patent/CN201289334Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538504A (en) * | 2012-02-09 | 2012-07-04 | 辽宁赛沃斯节能技术有限公司 | Optimized energy-saving cold-preventing system and method at air inlet sides of cooling tower |
| CN102538504B (en) * | 2012-02-09 | 2013-09-11 | 辽宁赛沃斯节能技术有限公司 | Optimized energy-saving cold-preventing system and method at air inlet sides of cooling tower |
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Owner name: BEIJING GUOYAN HUABEI TECHNICAL DETECTION CO., LTD Free format text: FORMER OWNER: BEIJING QIANHUA TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20120713 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 100011 XICHENG, BEIJING TO: 100120 XICHENG, BEIJING |
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Effective date of registration: 20120713 Address after: 100120, Xicheng District, Beijing, six paved Kang north side street, No. 5, 5 floor (Desheng Park) Patentee after: North China Beijing Guoyan Technical Testing Co., Ltd. Address before: 100011 Beijing city Xicheng District Street No. 24 Patentee before: Beijing Ganhua Technology Development Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20090812 |
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| CX01 | Expiry of patent term |