A snow-prevention and snow-melting device and method for sloped road surfaces of roads and bridges

Abstract

The present invention discloses a snow-proof and snow-melting device and method for a sloped road surface of a road bridge, comprising a sloped heat-releasing pipe section arranged below the sloped road surface and a bottom heat-taking pipe section and a heat extraction pipe section arranged in the soil below the sloped road surface and connected to each other; a working medium is stored in the bottom heat-taking pipe section, and a filler is arranged in the heat extraction pipe section; the top of the heat extraction pipe section is higher than the soil and connected to the sloped heat-releasing pipe section parallel to the sloped road surface, and a working medium transfer device is connected to the heat extraction pipe section. The present invention relies on the temperature difference between the soil and the outdoor environment as a driving force, and uses a full reflux distillation type heat extraction device to extract heat from the soil and continuously transfer it to the road bridge slope surface, which has low operating costs and strong snow-proof and snow-melting effects.

Description

Technical Field

[0001] The invention relates to the technical field of snow removal for roads and bridges in winter, and in particular to a snow-prevention and snow-melting device and method for sloped pavement of roads and bridges. Background Art

[0002] There are many technologies for snow removal on roads and bridges. Although the traditional method of spreading salt to melt snow and ice is simple, convenient and effective, it can also cause road corrosion and secondary soil pollution caused by the return of salt solution. In addition, most snow removal technologies are mechanical snow removal devices.

[0003] The patent "A snow and ice removal device for the ramp of a highway or bridge" (201010146977.6) uses electric heating and heat pipe technology to transfer heat on the road surface at the ramp of the highway and bridge; the patent "Automatic water removal and ice and snow removal system for the road surface" (201310081435.9) realizes automatic water removal and ice and snow removal functions through power supply and road surface heating equipment; the patent "Bridge deck snow removal device" (CN201620236571.X) also sets a heater on the bridge deck to realize the snow removal function; the patent "An automatic ice and snow removal system" (CN2017103607 57.5) A heating device is installed under the road surface, and the heat comes from hot water; the patent "Bridge Deck and Road Deicing System" (CN201721022431.3) uses soil source heat pump technology to obtain heat source to achieve deicing of bridge decks and roads; the patent "A Heat Pipe Snow Removal and Ice Melting Device Based on Solar Thermal Utilization" (201910160693.3) combines solar energy technology with heat pipe technology for snow removal and ice melting; the patent "Road and Bridge Bidirectional Heat Pipe Snow Removal and Cooling System" (201520170499.0) uses soil heat pipe technology to remove snow in winter and cool down bridges in summer.

[0004] In the snow removal and melting technology of roads and bridges, in addition to the difficulty of heat transfer, the source of heat is also a technical difficulty. Solar energy is greatly affected by the weather, and electric heating technology, ground source heat pump technology, etc. consume a lot of electric energy. Although heat pipe technology is an effective heat transfer method, the energy transferred per unit volume is limited, and the investment is huge for large road and bridge surfaces.

[0005] From the perspective of the snowfall process and the deposition process of snowflakes on surfaces such as roads and bridges, as long as a certain temperature difference can be provided in the ruts of roads and bridges, it can effectively prevent snow and melt snow. Especially on the sloped road surfaces of roads and bridges, if a certain temperature difference can be provided for the ruts at the beginning of snowfall, the snowflakes will vaporize or melt on the surface of the road and bridge and flow away in time, which can effectively prevent snow and melt snow. Summary of the invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention relies on the temperature difference between the soil and the outdoor environment as a driving force, and adopts a full reflux distillation type heat extraction device to extract heat from the soil and continuously transfer it to the slope of the road and bridge. The entire system relies on the temperature difference between the soil and the outdoor environment as a driving force, and circulates heat from the soil to the bridge deck, thereby realizing snow prevention and snow melting on the sloped road surface of the road and bridge.

[0007] The present invention is achieved through the following technical solutions.

[0008] A snow-proof and snow-melting device for a sloped road surface of a road bridge comprises a sloped heat-releasing pipe section arranged below the sloped road surface and a bottom heat-taking pipe section and a heat-extraction pipe section arranged in the soil below the sloped road surface and connected to each other, wherein a working medium is stored in the bottom heat-taking pipe section, and a filler is arranged in the heat-extraction pipe section; the top of the heat-extraction pipe section is higher than the soil and connected to the sloped heat-releasing pipe section parallel to the sloped road surface, and a working medium transfer device is connected to the heat-extraction pipe section;

[0009] The working medium transfer device includes a first valve, a working medium vacuum pump, a condenser, and a liquid storage tank connected in sequence through a pipeline for recovering the working medium; and another pipeline connected to a second valve and a liquid storage tank for filling the working medium.

[0010] For the above technical solution, further preferred solutions are also included:

[0011] Preferably, the portion of the heat extraction pipe section above the ground is provided with a filling and recovery port for the working medium.

[0012] Preferably, the bottom heat extraction pipe section, heat extraction pipe section and sloped heat release pipe section under the sloped road surface are arranged in two parallel lines, the width of each sloped heat release pipe section is 200mm-400mm, and the length of the sloped heat release pipe section is the length of the sloped road surface; the interval between two adjacent sloped heat release pipe sections is 1300mm-1800mm.

[0013] Preferably, a heat-conducting coil is arranged inside the bottom heat extraction pipe section, and a plurality of metal rods are welded at the bottom of the bottom heat extraction pipe section. The metal rods are inserted into the soil at a depth of 10-30 meters from the ground surface.

[0014] Preferably, the working medium in the bottom heat extraction pipe section is injected between the outside of the heat conduction coil and the inner wall of the bottom heat extraction pipe section, and the working medium is Freon, ammonia, alcohol or acetone.

[0015] Preferably, the working medium is only poured from the liquid storage tank into the bottom heat extraction pipe section when the local winter city heating starts, and is recovered to the liquid storage tank after the winter city heating ends.

[0016] Preferably, the periphery of the heat extraction pipe section above the ground and the periphery of the sloped heat release pipe section are wrapped with heat insulation materials.

[0017] Preferably, the filler in the heat extraction pipe section is foam ceramic, foam metal or wire mesh.

[0018] Preferably, the system consisting of the bottom heat extraction pipe section, the heat extraction pipe section and the sloped heat release pipe section is a fully enclosed device, and a vacuum treatment is performed before the initial filling.

[0019] The present invention accordingly provides a method for preventing snow and melting snow on a sloped road surface of a road bridge, comprising:

[0020] When local winter city heating begins, the working medium is poured from the liquid storage tank into the bottom heat extraction pipe section. The working medium absorbs heat through the bottom heat extraction pipe section inserted into the soil, and the working medium exchanges heat and mass with the foam ceramic, foam metal or wire mesh filler in the extraction pipe section.

[0021] The sloped heat release pipe section above the heat extraction pipe section condenses the vapor of the working medium, and the rising vapor and the descending condensed liquid undergo sufficient heat and mass exchange in the filler of the heat extraction pipe section; wherein, the condensation and heat release of the working medium vapor in the sloped heat release pipe section realizes snow prevention and snow melting on the sloped pavement of roads and bridges.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) Relying on the temperature difference between the soil and the outdoor environment as the driving force, a full reflux distillation type heat extraction device is used to extract the heat in the soil and continuously transfer it to the slope of the road and bridge. In addition, only the heating device with the width of the rut is set, which is conducive to the effective use of heat and effectively plays a role in preventing snow and melting snow.

[0024] 2) The working medium is only poured into the liquid storage tank at the beginning of the local winter and is recovered to the liquid storage tank after the end of winter. The system is easy to maintain and has extremely low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 It is the structural process and principle diagram of the present invention.

[0027] In the figure: 1. Sloping road surface; 2. Bottom-layer heat extraction pipe section; 3. Heat extraction pipe section; 4. Sloping heat release pipe section; 5. First valve; 6. Working medium vacuum pump; 7. Condenser; 8. Liquid storage tank; 9. Second valve; 10. Soil. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0029] Reference Figure 1 As shown, a snow-melting device for a sloped road surface of a road bridge is provided, wherein a sloped heat release pipe section 4 is provided under the sloped road surface 1, and a bottom heat extraction pipe section 2 and a heat extraction pipe section 3 are provided under the soil 10 below the sloped road surface; a working medium is stored in the bottom heat extraction pipe section 2, and a filler is provided in the heat extraction pipe section 3; the top of the heat extraction pipe section 3 is higher than the soil and is connected to the sloped heat release pipe section 4; a working medium transfer device is connected to the heat extraction pipe section. The working medium transfer device includes a first valve 5, a working medium vacuum pump 6, a condenser 7, a liquid storage tank 8, and a second valve 9 which are connected in sequence through a pipeline; the part of the heat extraction pipe section 3 on the ground is reserved with a filling and recovery port for the working medium, one of which is connected to the first valve 5, and then connected to the working medium vacuum pump 6, the condenser 7 to the liquid storage tank 8 in sequence, and this one is used for the recovery of the working medium; the other one of which is connected to the second valve 9, and then connected to the bottom of the liquid storage tank 8, and this one is used for the filling of the working medium. The working medium is Freon, ammonia, alcohol or acetone, and the filler is foam ceramic, foam metal or wire mesh.

[0030] Two bottom heat extraction pipe sections 2, heat extraction pipe sections 3 and sloped heat release pipe sections 4 are arranged in parallel under the sloped pavement 1. The width of each sloped heat release pipe section is 200mm-400mm, and the length of the sloped heat release pipe section is the length of the sloped pavement; the interval between two adjacent sloped heat release pipe sections is 1300mm-1800mm.

[0031] The bottom heat extraction pipe section 2 is provided with a heat conduction coil inside, and the working medium is poured between the outside of the heat conduction coil and the inner wall of the bottom heat extraction pipe section. A plurality of metal rods are welded at the bottom of the bottom heat extraction pipe section 2, and the metal rods are inserted into the soil at a depth of 10-30 meters from the ground. The outer part of the heat extraction pipe section 3 on the ground and the outer part of the sloped heat release pipe section 4 are provided with heat insulation materials.

[0032] The system composed of the bottom heat extraction pipe section 2, the heat extraction pipe section 3 and the sloped heat release pipe section 4 is a fully enclosed device, and a vacuum treatment is performed before the initial filling.

[0033] In the full reflux distillation type heat extraction device of the present invention, the bottom layer heat extraction pipe section is the soil heat absorption section, the middle heat extraction pipe section is the heat and mass exchange extraction section, and the upper sloped heat release pipe section is the steam condensation section. After the working medium extracts heat from the soil, the liquid vaporizes into steam, and the steam flows to the sloped heat release pipe section of the sloped road surface under the drive of the pressure difference, and flows back by gravity after condensing into liquid after releasing heat. The vaporized steam and the returning liquid exchange heat and mass in the heat extraction pipe section filler. In this way, the entire system relies on the temperature difference between the soil and the outdoor environment as a driving force to extract heat from the soil to the bridge surface in a cycle, thereby realizing snow and snow melting on the sloped road surface of the road bridge.

[0034] The snow-proof and snow-melting process of the sloped road surface of the road bridge of the present invention is as follows: when the local winter city heating starts, the working medium Freon, ammonia, alcohol or acetone is poured from the liquid storage tank 8 into the bottom heat extraction pipe section 2 through the second valve 9, and the working medium absorbs heat through the bottom heat extraction pipe section 2 inserted into the soil. The sloped heat release pipe section 4 above the heat extraction pipe section 3 condenses the working medium vapor, and the rising vapor and the descending condensed liquid are fully exchanged with heat and mass in the filler of the heat extraction pipe section 3; wherein, the condensation and heat release of the working medium vapor in the sloped heat release pipe section 4 realizes the snow-proof and snow-melting of the sloped road surface of the road bridge.

[0035] The working medium is only filled from the storage tank when the local winter city heating starts, and is recovered to the storage tank after the winter city heating ends.

[0036] Through the system of the present invention, relying on the temperature difference between the soil and the outdoor environment as the driving force, a full reflux distillation type heat extraction device is used to extract the heat in the soil and continuously transfer it to the slope of the road and bridge, thereby forming a slow and continuous heating of the rut width road surface. In addition, the rolling effect of the vehicle on the rut road surface can achieve the effect of snow prevention and snow melting on the slope road surface.

[0037] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A snow-prevention and snow-melting device for sloped roads and bridges, characterized in that: It comprises a sloped heat release pipe section (4) arranged below the sloped road surface, and a bottom heat extraction pipe section (2) and a heat extraction pipe section (3) arranged in the soil (10) below the sloped road surface and connected to each other, wherein the bottom heat extraction pipe section (2) is filled with a working medium, and the heat extraction pipe section (3) is provided with a filler; The top of the heat extraction pipe section (3) is higher than the soil (10) and is connected to the sloped heat release pipe section (4) parallel to the sloped road surface. A working medium transfer device is connected to the heat extraction pipe section (3); A heat-conducting coil is arranged inside the bottom heat extraction pipe section (2), and a plurality of metal rods are welded at the bottom of the bottom heat extraction pipe section (2), and the metal rods are inserted into the soil at a depth of 10-30 meters from the ground surface; The part of the heat extraction pipe section (3) above the ground is reserved with a filling port and a recovery port for the working medium; The filler in the heat extraction pipe section (3) is foam ceramic, foam metal or metal wire mesh; The working medium transfer device comprises a first path connected in sequence through a pipeline to a first valve (5), a working medium vacuum pump (6), a condenser (7) and a liquid storage tank (8), for recovering the working medium; and another path connected through a pipeline to a second valve (9) and a liquid storage tank (8), for filling the working medium. The working medium is only poured from the liquid storage tank (8) into the bottom heat extraction pipe section (2) when the local winter city heating starts, and is recovered to the liquid storage tank after the winter city heating ends; The system composed of the bottom heat extraction pipe section (2), the heat extraction pipe section (3) and the sloped heat release pipe section (4) is a fully enclosed device, which is vacuumed before the initial filling.

2. The snow-melting device for sloped road surfaces of roads and bridges according to claim 1, characterized in that: The bottom heat extraction pipe section (2), the heat extraction pipe section (3) and the sloped heat release pipe section (4) under the sloped road surface are arranged in two parallel paths, the width of each sloped heat release pipe section (4) is 200 mm-400 mm, and the length of the sloped heat release pipe section (4) is the length of the sloped road surface; the interval between two adjacent sloped heat release pipe sections (4) is 1300 mm-1800 mm.

3. The snow-melting device for sloped road surfaces of roads and bridges according to claim 1, characterized in that: The working medium in the bottom heat extraction pipe section (2) is injected between the outside of the heat conducting coil and the inner wall of the bottom heat extraction pipe section, and the working medium is Freon, ammonia, alcohol or acetone.

4. The snow-melting device for sloped road surfaces of roads and bridges according to claim 1, characterized in that: The periphery of the heat extraction pipe section (3) above the ground and the periphery of the sloped heat release pipe section (4) are wrapped with heat insulation material.

5. A method for preventing snow and melting using a snow and melting device for a sloped road surface of a road bridge as claimed in any one of claims 1 to 4, characterized in that: include: When local winter city heating begins, the working medium is poured from the liquid storage tank (8) into the bottom heat extraction pipe section (2), the working medium absorbs heat through the bottom heat extraction pipe section (2) inserted into the soil, and the working medium performs heat and mass exchange in the foam ceramic, foam metal or metal wire mesh filler in the extraction pipe section (3); The sloped heat release pipe section (4) above the heat extraction pipe section (3) performs steam condensation on the working medium, and the rising steam and the descending condensed liquid perform sufficient heat and mass exchange in the filler of the heat extraction pipe section (3); wherein the condensation and heat release of the working medium steam in the sloped heat release pipe section (4) realizes snow-prevention and snow-melting on the sloped road surface of the road bridge.

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