CN105425854A - Anti-ice heating control method of bridge cable - Google Patents
Anti-ice heating control method of bridge cable Download PDFInfo
- Publication number
- CN105425854A CN105425854A CN201510960924.0A CN201510960924A CN105425854A CN 105425854 A CN105425854 A CN 105425854A CN 201510960924 A CN201510960924 A CN 201510960924A CN 105425854 A CN105425854 A CN 105425854A
- Authority
- CN
- China
- Prior art keywords
- bridge deck
- temperature
- deck temperature
- bridge
- change
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- 238000005485 electric heating Methods 0.000 claims abstract description 26
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims description 52
- 238000005259 measurement Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008014 freezing Effects 0.000 abstract description 4
- 238000007710 freezing Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
Abstract
The invention discloses an anti-ice heating control method of a bridge cable, which comprises the steps that a temperature sensor is disposed on a bridge deck so as to collect bridge deck temperatures in real time; a variation rate of the bridge deck temperatures is calculated according to a sampling period of the temperature sensor, the bridge deck temperature at a previous moment and the real-time bridge deck temperature collected by the bridge deck temperature sensor; duration needed by the actual bridge deck temperature to increase to decrease to an anti-ice control set temperature is predicted according to the variation rate of the bridge deck temperatures; and according to the needed duration obtained according to the bridge deck temperature variation rate, the bridge deck temperature and the third step, starting, stopping and a to-be-input electric heating power of an electric heating system are controlled. The anti-ice heating control method of the bridge cable disclosed by the invention controls the starting, the stopping and the to-be-input electric heating power of the electric heating system according to the bridge deck temperature variation rate, the bridge deck temperature and the duration needed by the actual bridge deck temperature to increase to decreases to the anti-ice control set temperature so as to make sure that the bridge deck temperature is higher than a water freezing point temperature all the time and thus realize an anti-ice effect.
Description
Technical field
The invention belongs to traffic safety field, particularly a kind of bridge cable heats anti-icing control method.
Background technology
Every winter, China's most area just there will be freezing, sleety weather, the regional areas such as the bridge on highway, tunnel face due to its environment special, icing phenomenon can be more serious, and the automobile now travelled on this kind of road surface easily causes serious traffic accidents because of wheel-slip.Traditional deicing method mainly comprises mechanical deicing's method, traditional Snow Agent deicing method and electric cable heating deicing method and the anti-icing method of heat distribution pipeline.
Although mechanical deicing's method has, effect is high, the advantage of mobility strong, but machine cost is high, due to needs manual operation under bad weather condition, there is larger potential safety hazard, need closed highway to affect traffic during work, road pavement have huge damage and deicing not in time; The deicing of tradition Snow Agent can accelerate road surface breakage, reduces the serviceable life on road surface; Heat distribution pipeline is anti-icing is by arranging heat distribution pipeline in bridge floor lower floor, by heat source solution such as boilers, circulate under the paving layer of pontic, bridge floor is heated up thus a kind of technology of making ice, it is very large that bridge floor melts anti-icing system overall load, there is heating not in time or the reason such as stand-by time is incorrect in prior art, causes energy consumption excessive, and bridge floor is overheated and sometimes react and cause icy on road not in time or do not have anti-icing effect.
Electric cable heating deicing method is that the one in recent years occurred overlays electric heater unit between road deck and basic unit, is reached the object of electric heater unit heating, thus realize deicing by adjustment operating voltage or electric current.This kind method existence installation electric capacity is large and later maintenance is inconvenient, operating power consumption crosses the shortcomings such as high.In order to reduce installed capacity, what can make full use of bridge stores exothermicity, does not freeze period at bridge floor, open heating system to heat to pontic, heat storage is got up, treats that mercury dropped arrives below freezing, pontic is releases heat again, and this measure can effectively reduce maximum heating design capacity.But how the heat time determines and starts great heating power to be the still unsolved technical barrier of this technology in advance.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of easy to maintenance, low, that deicing is effective bridge cable that consumes energy and heating anti-icing control method.
The technical scheme that the present invention solves the problem is: a kind of bridge cable heats anti-icing control method, comprises the following steps:
Step one: in bridge floor set temperature sensor Real-time Collection bridge deck temperature;
Step 2: the bridge floor real time temperature gathered according to the sampling period of bridge deck temperature sensor, the bridge deck temperature of previous moment and bridge deck temperature sensor, calculates the rate of change of bridge deck temperature;
Step 3: the time of rising according to the change rate forecast bridge floor actual temperature of bridge deck temperature or dropping to required for anti-icing control design temperature;
Step 4: the required time obtained according to bridge deck temperature rate of change, bridge deck temperature and step 3, controls the electrical heating power opening, stop and need to drop into of electric heating system.
Above-mentioned bridge cable heats anti-icing control method, and in described step 2, the computing formula of the rate of change dt/d τ of bridge deck temperature is as follows:
dt/dτ＝(t-t
0)/T
Wherein t is bridge deck temperature, t
0for the bridge deck temperature of previous moment, T is the sampling period of temperature sensor.
Above-mentioned bridge cable heats anti-icing control method, in described step 3, and the time t that bridge floor actual temperature rises or drops to required for design temperature
1computing formula as follows:
t
1＝Δt/(dt/dτ)
Wherein Δ t is bridge deck temperature t and design temperature t
sdifference, Δ t=t-t
s.
Above-mentioned bridge cable heats anti-icing control method, and the detailed process of described step 4 is as follows:
1) all measurement situations are divided into 6 control areas and a state retaining zone by these three parameters of required time first obtained according to bridge deck temperature rate of change, bridge deck temperature and step 3;
Concrete division is as follows: difference and the bridge deck temperature rate of change of bridge deck temperature and design temperature all go to zero, and are divided into state retaining zone; Bridge deck temperature higher than design temperature, bridge deck temperature rate of change be just or bridge deck temperature rate of change be negative, simultaneously the bridge deck temperature time dropped to required for design temperature is more than or equal to 60 minutes, is divided into control area I; Bridge deck temperature is higher than design temperature, and bridge deck temperature rate of change is negative, and the bridge deck temperature time dropped to required for design temperature is more than or equal to 30 minutes and is less than 60 minutes simultaneously, is divided into control area II; Bridge deck temperature is higher than design temperature, and bridge deck temperature rate of change is negative, and the bridge deck temperature time dropped to required for design temperature is less than 30 minutes simultaneously, is divided into control area III; Bridge deck temperature is lower than design temperature, and bridge deck temperature rate of change is negative or bridge deck temperature rate of change is just, the bridge deck temperature time risen to required for design temperature is more than or equal to 60 minutes simultaneously, is divided into control area IV; Bridge deck temperature is lower than design temperature, and bridge deck temperature rate of change is just, the bridge deck temperature time risen to required for design temperature is more than or equal to 30 minutes and is less than 60 minutes simultaneously, is divided into control area V; Bridge deck temperature is lower than design temperature, and bridge deck temperature rate of change is just, the bridge deck temperature time risen to required for design temperature is less than 30 minutes simultaneously, is divided into control area VI;
2) the required time value obtained according to the bridge deck temperature rate of change measured, bridge deck temperature and step 3 judges measurement situation belongs to which control area in 6 control areas and a state retaining zone; If belong to state retaining zone, then heating system output power remains unchanged, and is originally in halted state and then still keeps halted state; If belong to control area I, then electric heating system is out of service, and it is zero that electrical heating drops into power; If belong to control area II, then electric heating system drops into Partial Power, and input power is k
1* Q
max, k
1span is 0.1 ~ 0.3, Q
maxfor setting electrically heated peak power; If belong to control area III, then electric heating system drops into Partial Power, and input power is k
2* Q
max, k
2span is 0.5 ~ 0.75; If belong to control area IV, then electric heating system drops into whole power Q
max; If belong to control area V, then electric heating system drops into Partial Power, and input power is k
3* Q
max, k
3span 0.5 ~ 0.75; If belong to control area VI, then electric heating system drops into Partial Power, and input power is k
4* Q
max, k
4=0.15 ~ 0.3.
Beneficial effect of the present invention is: the present invention adopts temperature sensor Real-time Collection bridge deck temperature, then the rate of change of bridge deck temperature is calculated, according to the time that the change rate forecast bridge floor actual temperature of bridge deck temperature rises or drops to required for anti-icing control design temperature, last according to bridge deck temperature rate of change, the time that bridge deck temperature and bridge floor actual temperature rise or drop to required for anti-icing control design temperature, control opening of electric heating system, stop and need the electrical heating power of input, ensure that bridge deck temperature all the time higher than the freezing point temperature of water, thus realize anti-icing effect.
Accompanying drawing explanation
Fig. 1 is concrete control flow chart of the present invention.
Fig. 2 is the schematic diagram that the present invention divides control area.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, step of the present invention is as follows:
Step one: in bridge floor set temperature sensor Real-time Collection bridge deck temperature;
Step 2: the bridge floor real time temperature gathered according to the sampling period of temperature sensor, the bridge deck temperature of previous moment and bridge deck temperature sensor, calculates the rate of change of bridge deck temperature;
The computing formula of the rate of change dt/d τ of bridge deck temperature is as follows:
dt/dτ＝(t-t
0)/T
Wherein t is bridge deck temperature, t
0for the bridge deck temperature of previous moment, T is the sampling period of temperature sensor.
Step 3: the time of rising according to the change rate forecast bridge floor actual temperature of bridge deck temperature or dropping to required for anti-icing control design temperature;
The time t that bridge floor actual temperature rises or drops to required for design temperature
1computing formula as follows:
t
1＝Δt/(dt/dτ)
Wherein Δ t is bridge deck temperature t and design temperature t
sdifference, Δ t=t-t
s.
Step 4: the required time obtained according to bridge deck temperature rate of change, bridge deck temperature and step 3, controls the electrical heating power opening, stop and need to drop into of electric heating system.
Detailed process is as follows:
1) all measurement situations are divided into 6 control areas and a state retaining zone by these three parameters of required time first obtained according to bridge deck temperature rate of change, bridge deck temperature and step 3;
As shown in Figure 2, control area specifically divides as follows: difference DELTA t and the bridge deck temperature rate of change dt/d τ of bridge deck temperature and design temperature all go to zero (being less than the dull district half-breadth eps in Fig. 2), are divided into state retaining zone (dull district); Bridge deck temperature is higher than design temperature (i.e. Δ t > 0), bridge deck temperature rate of change is that just (bridge deck temperature is in rising trend) or bridge deck temperature rate of change are being negative (bridge deck temperature is on a declining curve), and bridge deck temperature t drops to design temperature t simultaneously
srequired time t
1>=60min, is divided into control area I; Bridge deck temperature is higher than design temperature (i.e. Δ t > 0), and bridge deck temperature rate of change is negative, and bridge deck temperature t drops to design temperature t simultaneously
srequired time 30min≤t
1< 60min, is divided into control area II; Bridge deck temperature is higher than design temperature (i.e. Δ t > 0), and bridge deck temperature rate of change is negative, and bridge deck temperature t drops to design temperature t simultaneously
srequired time t
1< 30min, is divided into control area III; Bridge deck temperature is lower than design temperature (i.e. Δ t < 0), and bridge deck temperature rate of change is negative or bridge deck temperature rate of change is just, bridge deck temperature t rises to design temperature t simultaneously
srequired time t
1>=60min, is divided into control area IV; Bridge deck temperature is lower than design temperature (i.e. Δ t < 0), and bridge deck temperature rate of change is just, bridge deck temperature t rises to design temperature t simultaneously
srequired time 30min≤t
1< 60min, is divided into control area V; Bridge deck temperature is lower than design temperature (i.e. Δ t < 0), and bridge deck temperature rate of change is just, bridge deck temperature t rises to design temperature t simultaneously
srequired time t
1< 30min, is divided into control area VI;
2) the required time value obtained according to the bridge deck temperature rate of change measured, bridge deck temperature and step 3 judges measurement situation belongs to which control area in 6 control areas and a state retaining zone; If belong to state retaining zone, then heating system output power remains unchanged, and namely carries out heating operation or be originally in stopping heated condition to be then still in stopping heated condition with original power; If belong to control area I, bridge deck temperature t rises, and now bridge deck temperature t is higher than design temperature t
s, then electric heating system is out of service, and it is zero that electrical heating drops into power; If belong to control area II, for the sake of assurance, then electric heating system drops into Partial Power, and input power is k
1* Q
max, k
1span is 0.1 ~ 0.3, Q
maxfor setting electrically heated peak power; If belong to control area III, then electric heating system drops into Partial Power, and input power is k
2* Q
max, k
2span is 0.5 ~ 0.75; If belong to control area IV, then electric heating system drops into whole power Q
max; If belong to control area V, illustrating that bridge deck temperature t rises needs the time longer, and consider the delayed of bridge heat transfer, then electric heating system drops into Partial Power, and input power is k
3* Q
max, k
3span 0.5 ~ 0.75; Can with speed rising faster if belong to control area VI, bridge deck temperature t, then electric heating system drops into Partial Power, and input power is k
4* Q
max, k
4=0.15 ~ 0.3.
Claims (4)
1. bridge cable heats an anti-icing control method, comprises the following steps:
Step one: in bridge floor set temperature sensor Real-time Collection bridge deck temperature;
Step 2: the bridge floor real time temperature gathered according to the sampling period of temperature sensor, the bridge deck temperature of previous moment and bridge deck temperature sensor, calculates the rate of change of bridge deck temperature;
Step 3: the time of rising according to the change rate forecast bridge floor actual temperature of bridge deck temperature or dropping to required for anti-icing control design temperature;
Step 4: the required time obtained according to bridge deck temperature rate of change, bridge deck temperature and step 3, controls the electrical heating power opening, stop and need to drop into of electric heating system.
2. bridge cable according to claim 1 heats anti-icing control method, it is characterized in that: in described step 2, and the computing formula of the rate of change dt/d τ of bridge deck temperature is as follows:
dt/dτ＝(t-t
0)/T
Wherein t is bridge deck temperature, t
0for the bridge deck temperature of previous moment, T is the sampling period of temperature sensor.
3. bridge cable according to claim 2 heats anti-icing control method, it is characterized in that: in described step 3, the time t that bridge floor actual temperature rises or drops to required for design temperature
1computing formula as follows:
t
1＝Δt/(dt/dτ)
Wherein Δ t is bridge deck temperature t and design temperature t
sdifference, Δ t=t-t
s.
4. bridge cable according to claim 3 heats anti-icing control method, it is characterized in that: the detailed process of described step 4 is as follows:
1) all measurement situations are divided into 6 control areas and a state retaining zone by these three parameters of required time first obtained according to bridge deck temperature rate of change, bridge deck temperature and step 3;
Concrete division is as follows: difference and the bridge deck temperature rate of change of bridge deck temperature and design temperature all go to zero, and are divided into state retaining zone; Bridge deck temperature higher than design temperature, bridge deck temperature rate of change be just or bridge deck temperature rate of change be negative, simultaneously the bridge deck temperature time dropped to required for design temperature is more than or equal to 60 minutes, is divided into control area I; Bridge deck temperature is higher than design temperature, and bridge deck temperature rate of change is negative, and the bridge deck temperature time dropped to required for design temperature is more than or equal to 30 minutes and is less than 60 minutes simultaneously, is divided into control area II; Bridge deck temperature is higher than design temperature, and bridge deck temperature rate of change is negative, and the bridge deck temperature time dropped to required for design temperature is less than 30 minutes simultaneously, is divided into control area III; Bridge deck temperature is lower than design temperature, and bridge deck temperature rate of change is negative or bridge deck temperature rate of change is just, the bridge deck temperature time risen to required for design temperature is more than or equal to 60 minutes simultaneously, is divided into control area IV; Bridge deck temperature is lower than design temperature, and bridge deck temperature rate of change is just, the bridge deck temperature time risen to required for design temperature is more than or equal to 30 minutes and is less than 60 minutes simultaneously, is divided into control area V; Bridge deck temperature is lower than design temperature, and bridge deck temperature rate of change is just, the bridge deck temperature time risen to required for design temperature is less than 30 minutes simultaneously, is divided into control area VI;
2) the required time value obtained according to the bridge deck temperature rate of change measured, bridge deck temperature and step 3 judges measurement situation belongs to which control area in 6 control areas and a state retaining zone; If belong to state retaining zone, then heating system output power remains unchanged, and is originally in halted state and then still keeps halted state; If belong to control area I, then electric heating system is out of service, and it is zero that electrical heating drops into power; If belong to control area II, then electric heating system drops into Partial Power, and input power is k
1* Q
max, k
1span is 0.1 ~ 0.3, Q
maxfor setting electrically heated peak power; If belong to control area III, then electric heating system drops into Partial Power, and input power is k
2* Q
max, k
2span is 0.5 ~ 0.75; If belong to control area IV, then electric heating system drops into whole power Q
max; If belong to control area V, then electric heating system drops into Partial Power, and input power is k
3* Q
max, k
3span 0.5 ~ 0.75; If belong to control area VI, then electric heating system drops into Partial Power, and input power is k
4* Q
max, k
4=0.15 ~ 0.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510960924.0A CN105425854B (en) | 2015-12-20 | 2015-12-20 | A kind of bridge cable heats anti-icing control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510960924.0A CN105425854B (en) | 2015-12-20 | 2015-12-20 | A kind of bridge cable heats anti-icing control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105425854A true CN105425854A (en) | 2016-03-23 |
| CN105425854B CN105425854B (en) | 2017-05-31 |
Family
ID=55504121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510960924.0A Expired - Fee Related CN105425854B (en) | 2015-12-20 | 2015-12-20 | A kind of bridge cable heats anti-icing control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105425854B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743979A (en) * | 2005-09-21 | 2006-03-08 | 晶辉科技（深圳）有限公司 | Electric-heating kettle thermal-insulation control method |
| KR100821268B1 (en) * | 2007-03-27 | 2008-04-14 | 민덕기 | Apparatus and method for curing concrete |
| CN201588188U (en) * | 2009-12-09 | 2010-09-22 | 李在东 | Automatic snow melting road and snow melting system for road |
| US20110297789A1 (en) * | 2010-06-08 | 2011-12-08 | Cessna Aircraft Company | Aircraft De-Icing System And Method |
| CN103365318A (en) * | 2013-07-12 | 2013-10-23 | 楚天科技股份有限公司 | Freeze drying equipment ply temperature intelligent control method and freeze drying equipment ply temperature intelligent control system |
| CN103448589A (en) * | 2013-08-09 | 2013-12-18 | 浙江吉利汽车研究院有限公司 | Fuzzy control based intelligent car seat heating control system and method |
| CN204203711U (en) * | 2014-10-15 | 2015-03-11 | 江苏省交通规划设计院股份有限公司 | A kind of bridge floor deicing or snow melting heating cable intelligent control system |
| CN104404872A (en) * | 2014-12-11 | 2015-03-11 | 湖南科技大学 | Device and method for controlling anti-icing system of heat distribution pipeline of highway bridge |
-
2015
- 2015-12-20 CN CN201510960924.0A patent/CN105425854B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743979A (en) * | 2005-09-21 | 2006-03-08 | 晶辉科技（深圳）有限公司 | Electric-heating kettle thermal-insulation control method |
| KR100821268B1 (en) * | 2007-03-27 | 2008-04-14 | 민덕기 | Apparatus and method for curing concrete |
| CN201588188U (en) * | 2009-12-09 | 2010-09-22 | 李在东 | Automatic snow melting road and snow melting system for road |
| US20110297789A1 (en) * | 2010-06-08 | 2011-12-08 | Cessna Aircraft Company | Aircraft De-Icing System And Method |
| CN103365318A (en) * | 2013-07-12 | 2013-10-23 | 楚天科技股份有限公司 | Freeze drying equipment ply temperature intelligent control method and freeze drying equipment ply temperature intelligent control system |
| CN103448589A (en) * | 2013-08-09 | 2013-12-18 | 浙江吉利汽车研究院有限公司 | Fuzzy control based intelligent car seat heating control system and method |
| CN204203711U (en) * | 2014-10-15 | 2015-03-11 | 江苏省交通规划设计院股份有限公司 | A kind of bridge floor deicing or snow melting heating cable intelligent control system |
| CN104404872A (en) * | 2014-12-11 | 2015-03-11 | 湖南科技大学 | Device and method for controlling anti-icing system of heat distribution pipeline of highway bridge |
Non-Patent Citations (2)
| Title |
|---|
| 张登春等: "公路桥梁发热电缆除冰系统试验研究", 《中国安全生产科学技术》 * |
| 武海琴: "发热电缆用于路面融雪化冰的技术研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105425854B (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104805754B (en) | A kind of intelligent road melting ice and snow system and method | |
| CN104404872B (en) | A kind of highway bridge heat distribution pipeline anti-icing system control device and control method | |
| CN203113219U (en) | Highway bridge capable of preventing freeze and accumulated snow through solar energy | |
| CN101979770A (en) | Solar photoelectric complementary road de-icing and snow melting control system | |
| CN104005318A (en) | Electrical-snow melting asphalt concrete pavement used for municipal roads | |
| CN202116965U (en) | Thermoelectric conversion device for heat transfer of asphalt concrete road | |
| CN102061655A (en) | Solar energy photovoltaic snowmelt pavement integrating system | |
| CN104746394A (en) | Ice and snow melting device for steel track beam | |
| CN204290227U (en) | Road deicing device | |
| CN205501771U (en) | Road with snow melt ice function | |
| CN203904797U (en) | Intelligent environment-friendly anti-freezing road bridge surface structure | |
| CN202131554U (en) | Active heat-insulation antiskid facility for road surfaces | |
| CN105573377A (en) | Operation control method of fluid heating road snow-melting system | |
| CN105425854B (en) | A kind of bridge cable heats anti-icing control method | |
| CN104846792A (en) | Defroster for gate slot of water conservancy and hydropower gate | |
| CN203741766U (en) | Snow melting device of snow clearer | |
| CN203904798U (en) | Electric snow-melting asphalt concrete pavement applicable to municipal road | |
| CN203782520U (en) | Unattended automatic pavement snow removal system | |
| CN206974257U (en) | A kind of heat-pipe apparatus that the dark ice of cold area's road is eliminated using underground water heat energy | |
| CN204325921U (en) | A kind of highway bridge heat distribution pipeline anti-icing system control device | |
| CN211378268U (en) | Track anti-freezing system | |
| CN205426324U (en) | Truck scale weighing platform system of preventing frostbite | |
| CN204252137U (en) | Dam electrically conductive graphite concrete temperature control protective device | |
| WO2021093694A1 (en) | Snow removing and ice melting apparatus and construction method thereof | |
| CN109610401B (en) | Water conservancy water and electricity gate upstream face anti-freezing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210324 Address after: 411201 No. 2 stone wharf, Yuhu District, Hunan, Xiangtan Patentee after: HUNAN University OF SCIENCE AND TECHNOLOGY Patentee after: Hunan Expressway Group Co.,Ltd. Patentee after: HUNAN COMMUNICATIONS RESEARCH INSTITUTE CO.,LTD. Address before: 411201 No. 2 stone wharf, Yuhu District, Hunan, Xiangtan Patentee before: Hunan University of Science and Technology |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 |