Gravity type inorganic heat pipe for road bridge section

Abstract

The utility model relates to the technical field of road construction, in particular to a gravity type inorganic heat pipe for a road bridge section, which comprises an evaporation pipe, a heat insulation pipe and a condensation pipe, the lower end of the evaporation pipe is closed, the upper end of the evaporation pipe is fixedly connected with a second connector, and the lower end of the heat insulation pipe is fixedly connected with a first connector. The first connector and the second connector are in threaded sealing connection, the included angle between the horizontal end and the vertical end of the tee joint is 90-95 degrees, the tee joint is fixedly connected to the upper end of the heat insulation pipe, the other two ends of the tee joint are fixedly connected with one end of the condensation pipe, the other end of the condensation pipe is closed, and the inner ends of the evaporation pipe, the heat insulation pipe and the condensation pipe are in a vacuum state after air is extracted. A proper amount of medium is injected into the inner end in advance; the device has the beneficial effects that in winter, the temperature of the evaporating pipe is high, the temperature of the condensing pipe is low, a working medium in the heat pipe evaporates from the evaporating pipe, upwards reaches the condensing pipe, releases heat and condenses at the condensing pipe, and then flows back to the evaporating pipe under the action of gravity, so that heat transfer is realized, and accumulated snow is melted.

Description

TECHNICAL FIELD

[0001] The utility model relates to road construction technical field, concretely is a gravity type inorganic heat pipe for road bridge section. BACKGROUND

[0002] The road snow and ice in winter or cold area seriously affect traffic, economy and normal outdoor activities and work. The current commonly used "passive type" snow melting technology such as mechanical method and chemical snow melting method has the problems such as low snow removal efficiency and great environmental pollution damage.

[0003] Therefore, exploring the snow melting technology with energy conservation, strong applicability and less influence on existing pavement becomes an important task for solving the road snow melting and ice melting problem, and the "active type" ice melting and snow melting technology such as shallow geothermal gravity heat pipe has attracted more and more attention. Therefore, the utility model provides a gravity type inorganic heat pipe for road bridge section to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a gravity type inorganic heat pipe for road bridge section to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a gravity type inorganic heat pipe for road bridge section, comprising: an evaporation pipe, an adiabatic pipe and a condensation pipe, the lower end of the evaporation pipe is closed, the upper end of the evaporation pipe is fixedly connected with a connector two, the lower end of the adiabatic pipe is fixedly connected with a connector one, the connector one and the connector two are threadedly and sealingly connected, and the included angle between the horizontal end and the vertical end of the tee joint is 90 degrees to 95 degrees.

[0006] The upper end of the adiabatic pipe is fixedly connected with a tee joint, the other two ends of the tee joint are fixedly connected with one end of the condensation pipe respectively, the other end of the condensation pipe is closed, the evaporation pipe, the adiabatic pipe and the condensation pipe are in vacuum state by extracting air from the inner end, and a proper amount of medium is pre-injected into the inner end.

[0007] Preferably, the connection between the tee joint and the condensation pipe and the adiabatic pipe is continuously welded by argon arc welding.

[0008] Preferably, the inner wall of the evaporation pipe, the adiabatic pipe and the condensation pipe is provided with a passivation film by electrochemical passivation.

[0009] Preferably, the outer wall of the evaporation pipe is coated with a waterproof coating one, the waterproof coating one is wrapped with a layer of glass fiber cloth, and the glass fiber cloth is coated with a waterproof coating two outside.

[0010] Preferably, the inner wall of the evaporation pipe is provided with a plurality of spiral micro-ribs, and the cross-sectional shape of each spiral micro-rib is trapezoidal.

[0011] Preferably, a protective layer is provided at the outer end of the heat insulation pipe, and a foamed heat insulation layer is injected into the cavity between the protective layer and the heat pipe wall.

[0012] Preferably, the outer end of the condenser tube is coated with a waterproof coating, the upper part of the inner wall of the condenser tube is provided with a semi-circular array of convex heat dissipation surfaces, the lower part of the inner wall is provided with a confluence groove, and a return flow surface is provided between the heat dissipation surface and the confluence groove.

[0013] Preferably, the outer end of the first connector is provided with an external thread, the upper end of the second connector is fixedly installed with a sealing ring, the upper outer wall of the second connector and the lower inner end of the first connector are threadedly connected, and the sealing ring abuts against the inner end of the first connector.

[0014] Preferably, a retaining ring is fixedly installed on the outer end of the second connector, and a threaded cap is fitted on the outer end of the second connector. The inner wall of the threaded cap is connected to the outer wall of the first connector by an external thread.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In winter, the evaporator tube has a high temperature and the condenser tube has a low temperature. The working fluid inside the heat pipe evaporates from the evaporator tube, rises to the condenser tube, releases heat and condenses at the condenser tube, and then flows back to the evaporator tube by gravity, thus transferring heat and melting the snow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram showing the partial structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-section of the evaporator tube of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-section of the heat insulation pipe of this utility model;

[0022] Figure 6 This is a schematic diagram of the cross-section of the condenser tube of this utility model.

[0023] In the diagram: 1. Evaporator tube; 2. Insulation tube; 3. Condenser tube; 4. T-joint; 5. Connector 1; 6. External thread; 7. Connector 2; 8. Sealing ring; 9. Retaining ring; 10. Threaded cap; 11. Passivation film; 101. Waterproof coating 1; 102. Fiberglass cloth; 103. Waterproof coating 2; 201. Protective layer; 202. Foamed insulation layer; 301. Waterproof coating 3; 302. Heat dissipation surface; 303. Return flow surface; 304. Manifold. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Please see Figures 1 to 6 This utility model provides a technical solution: a gravity-type inorganic heat pipe for road and bridge sections, comprising: an evaporator 1, an adiabatic pipe 2, and a condenser 3. The lower end of the evaporator 1 is closed, and a connector 2 7 is fixedly connected to the upper end of the evaporator 1. A connector 1 5 is fixedly connected to the lower end of the adiabatic pipe 2. The connector 1 5 and the connector 2 7 are connected by a threaded seal. The outer end of the connector 1 5 has an external thread 6. A sealing ring 8 is fixedly installed on the upper end of the connector 2 7. The outer wall of the upper end of the connector 2 7 is threadedly connected to the inner end of the lower end of the connector 1 5, and the sealing ring 8 abuts against the inner end of the connector 1 5. A retaining ring 9 is fixedly installed on the outer end of the connector 2 7. A threaded cap 10 is fitted on the outer end of the connector 2 7. The inner wall of the threaded cap 10 is threadedly connected to the outer wall of the connector 1 5 through the external thread 6, which facilitates the disassembly and assembly of the evaporator 1 and the adiabatic pipe 2.

[0026] The angle between the horizontal and vertical ends of the tee 4 is 90 to 95 degrees. The upper end of the insulation pipe 2 is fixedly connected to the tee 4. The other two ends of the tee 4 are fixedly connected to one end of the condenser pipe 3. The connection between the tee 4, the condenser pipe 3, and the insulation pipe 2 is continuously welded by argon arc welding. The other end of the condenser pipe 3 is closed. The evaporator pipe 1, the insulation pipe 2, and the condenser pipe 3 are combined in a T shape, and the angle between the condenser pipe 3 and the insulation pipe 2 is 90 to 95 degrees. The condenser pipe 3 is in a state where one side is higher than the other, which allows the condensing medium of the condenser pipe 3 to flow back to the evaporator pipe 1 more quickly, thereby improving the heat transfer efficiency. The air inside the evaporator pipe 1, the insulation pipe 2, and the condenser pipe 3 is drawn into a vacuum state, and an appropriate amount of medium is pre-filled into the inside.

[0027] The inner walls of the evaporator tube 1, the insulation tube 2, and the condenser tube 3 are provided with a passivation film 11 through electrochemical passivation. The passivation film 11 is a passivation film composed of inorganic materials, which protects the inner ends of the evaporator tube 1, the insulation tube 2, and the condenser tube 3.

[0028] The outer wall of the evaporator tube 1 is coated with a waterproof coating 101. The outer layer of the waterproof coating 101 is wrapped with a layer of fiberglass cloth 102. The outer layer of the fiberglass cloth 102 is coated with a waterproof coating 103. Both waterproof coatings are polyurethane coatings. The evaporation section adopts multi-layer double-layer waterproof coatings to prevent corrosion caused by long-term burial in the soil. The inner wall of the evaporator tube 1 is provided with multiple spiral microribs. The cross-sectional shape of each spiral microrib is trapezoidal, which increases the heating area of ​​the working fluid, increases the geothermal conduction power, and improves the overall heat conduction efficiency of the heat pipe.

[0029] A protective layer 201 is provided at the outer end of the heat insulation pipe 2. The protective layer 201 is a plastic pipe prefabricated from high-density polyethylene. A foamed heat insulation layer 202 is injected into the cavity between the protective layer 201 and the heat pipe wall. Rigid polyurethane foam liquid is injected into the cavity between the protective layer 201 and the heat pipe wall. The rigid polyurethane foam liquid foams to form the heat insulation layer.

[0030] The outer end of the condenser tube 3 is coated with a waterproof coating 301. The upper part of the inner wall of the condenser tube 3 is provided with a semi-circular array of convex heat dissipation surfaces 302, and the lower part of the inner wall is provided with a flow channel 304. A return surface is provided between the heat dissipation surface 302 and the flow channel 304. The semi-circular array of convex heat dissipation surfaces 302 on the upper part of the condenser tube 3 increases the condensation heat dissipation area of ​​the medium and improves the heat transfer efficiency. The smooth and continuous return surface 303 and flow channel 304 can return the condensing working fluid to the evaporator tube 1 more quickly, improving the overall heat transfer efficiency of the heat pipe.

[0031] Holes are pre-drilled in the middle of the bridge piers and pile foundations. The lower evaporator 1 of the heat pipe "T" shape is installed downwards into the stratum through the drilled hole. The transverse condenser pipes 3 on both sides of the heat pipe "T" shape are arranged along the roadway. The evaporator 1 is buried in the stratum along the pre-reserved hole in the middle of the pier and pile. The condenser pipes 3 are arranged along the roadway to transfer heat to the road surface.

[0032] When this device is working, a vacuum is drawn inside the heat pipe, and an appropriate amount of heat transfer medium is injected. The vertical section of the heat pipe is buried in the stratum along the pre-reserved holes at the middle position of the column pier and pile. The condenser pipe 3 is arranged along the lane to transfer heat to the road surface. In summer, the temperature of the condenser pipe 3 is high and the temperature of the evaporator pipe 1 is low. The internal working medium is in a gaseous state. Heat is transferred from the condenser pipe 3 to the evaporator pipe 1, which slightly increases the heat storage of the stratum under the roadbed. In winter, the heat pipe operates normally. The temperature of the evaporator pipe 1 is high and the temperature of the condenser pipe 3 is low. The working medium inside the heat pipe evaporates from the evaporator pipe 1 and rises to the condenser pipe 3. Heat is released and condensed at the position of the condenser pipe 3. Then, it flows back to the evaporator pipe 1 by gravity, thus realizing the heat transfer.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gravity-type inorganic heat pipe for use in road and bridge sections, characterized in that: include: Evaporator (1), insulation pipe (2) and condenser (3), the lower end of evaporator (1) is closed, the upper end of evaporator (1) is fixedly connected to connector two (7), the lower end of insulation pipe (2) is fixedly connected to connector one (5), connector one (5) and connector two (7) are threaded and sealed, and the angle between the horizontal end and the vertical end of tee (4) is 90 degrees to 95 degrees; The upper end of the heat insulation pipe (2) is fixedly connected to a tee (4), and the other two ends of the tee (4) are fixedly connected to one end of the condenser pipe (3). The other end of the condenser pipe (3) is closed. The air inside the evaporator pipe (1), heat insulation pipe (2) and condenser pipe (3) is drawn into a vacuum state, and an appropriate amount of medium is pre-filled into the inner end.

2. The gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: The connection between the tee (4), the condenser pipe (3), and the insulation pipe (2) is continuously welded by argon arc welding.

3. A gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: The inner walls of the evaporator (1), the insulation tube (2) and the condenser (3) are provided with a passivation film (11) through electrochemical passivation.

4. A gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: The outer wall of the evaporator tube (1) is coated with a waterproof coating one (101), the outer surface of the waterproof coating one (101) is wrapped with a layer of fiberglass cloth (102), and the outer surface of the fiberglass cloth (102) is coated with a waterproof coating two (103).

5. A gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: The inner wall of the evaporator tube (1) is provided with multiple spiral microribs, and the cross-sectional shape of each spiral microrib is trapezoidal.

6. A gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: The outer end of the heat insulation pipe (2) is provided with a protective layer (201), and a foamed heat insulation layer (202) is injected into the cavity between the protective layer (201) and the heat pipe wall.

7. A gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: The outer end of the condenser tube (3) is coated with a waterproof coating (301). The upper part of the inner wall of the condenser tube (3) is provided with a semi-circular array of convex heat dissipation surfaces (302), and the lower part of the inner wall is provided with a confluence groove (304). A return flow surface is provided between the heat dissipation surface (302) and the confluence groove (304).

8. A gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: The outer end of connector one (5) is provided with an external thread (6), and a sealing ring (8) is fixedly installed on the upper end of connector two (7). The upper outer wall of connector two (7) and the lower inner end of connector one (5) are threadedly connected, and the sealing ring (8) and the inner end of connector one (5) abut against each other.

9. A gravity-type inorganic heat pipe for road and bridge sections according to claim 1, characterized in that: A retaining ring (9) is fixedly installed on the outer end of the second connector (7), and a threaded cap (10) is fitted on the outer end of the second connector (7). The inner wall of the threaded cap (10) is connected to the outer wall of the first connector (5) by an external thread (6).

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