CN116254801B - Anti-freezing system and construction method of wading concrete structures in cold regions - Google Patents

Abstract

The application provides an anti-freezing system of a wading concrete structure in a cold region and a construction method thereof, and relates to the technical field of wading engineering, wherein the anti-freezing system comprises a vacuumizing protection body, a flexible carrier, a connecting piece and an unpowered heat exchange heat pipe, wherein the vacuumizing protection body is provided with a closed cavity; the flexible carrier and the unpowered heat exchange heat pipe are arranged in the closed cavity, the unpowered heat exchange heat pipe is connected with the flexible carrier, and the connecting piece is connected with the flexible carrier and extends out of the closed cavity. The unpowered heat exchange heat pipe can realize automatic transmission of heat of the deep high Wen Shuiti of the wading structure in the cold season to the surface layer low-temperature water body, no manual operation is needed, and time and labor are saved. Meanwhile, the unpowered heat exchange heat pipe utilizes the natural distribution characteristic that the temperature of the cold region water body increases from the surface layer to the deep layer, does not need any external power, is green and environment-friendly, and effectively solves the problems of time and labor waste, energy consumption and low efficiency of the water body deicing technology around the cold region wading structure.

Description

Anti-freezing system and construction method of wading concrete structures in cold regions

technical field

The invention relates to the technical field of wading engineering, in particular to an anti-freezing system and construction method for wading concrete structures in cold regions.

Background technique

Cold regions are widely distributed in the world, and the construction of water conservancy and transportation projects in cold regions is large. Affected by the low temperature weather, the surface water body of the water area of the wading structure changes into ice, and the ice cover is thick and lasts for a long time. Under the influence of multiple factors such as ice and freeze-thaw cycles, the problem of freezing damage to water bodies in the area around wading structures in cold regions is prominent, which seriously affects the safe service of wading projects. At present, the commonly used anti-freezing methods for hydraulic structures include: electrothermal method, pressure water jet method and compressed air bubble method. These technical methods all need to use external power supply or air supply equipment, and must be operated manually for a long time in the harsh environment of high cold , not only consumes energy, is not environmentally friendly, but also takes time and effort, and the deicing range is limited and the efficiency is low.

Contents of the invention

The object of the present invention is to provide an anti-freezing system and construction method for wading concrete structures in cold regions, so as to improve the problems of time-consuming, laborious, energy-consuming and inefficient deicing technology for water bodies around wading structures in cold regions.

Embodiments of the present invention are achieved like this:

In the first aspect, the present invention provides an anti-freezing system for wading concrete structures in cold regions, including:

A vacuum protection body, a flexible carrier, a connector and a non-powered heat exchange heat pipe, the vacuum protection body is provided with a closed chamber; the flexible carrier and the non-power heat exchange heat pipe are all arranged in the closed chamber, The non-powered heat exchange heat pipe is connected to the flexible carrier, and the connecting piece is connected to the flexible carrier and extends out of the closed chamber.

In an optional embodiment, the flexible carrier includes an outer frame and a flexible waterproof fiber mesh blanket, the flexible waterproof fiber mesh blanket is fixed on the outer frame and is located in the area surrounded by the outer frame; The connecting piece is connected with the outer frame; the heat pipe without power heat exchange is connected with the flexible waterproof fiber grid blanket.

In an optional embodiment, the connector is configured as a hook.

In an optional embodiment, the non-powered heat exchange heat pipe includes a condensation pipe section, an adiabatic pipe section, and an evaporation pipe section connected in sequence; the flexible carrier has opposite first and second sides, and the evaporation pipe section is compared to the The condensation pipe section is arranged close to the first side; when the flexible carrier is placed in a water body, the height of the first side is lower than that of the second side.

In an optional embodiment, the number of the condensing pipe sections is multiple, and one end of the multiple condensing pipe sections communicates with the adiabatic pipe section, and the other ends of the multiple condensing pipe sections have intervals.

In an optional embodiment, a positioning piece is arranged on the flexible carrier, and the heat pipe for unpowered heat exchange is connected to the positioning piece.

In an optional embodiment, a net bag is provided on the flexible carrier, the unpowered heat exchange heat pipe is inserted into the net bag, and the unpowered heat exchange heat pipe and the net bag The extension direction of the power heat exchange heat pipe is relatively fixed.

In an optional embodiment, the positioning member is configured as a clamp.

In an optional embodiment, the vacuum protection body is attached to the outside of the flexible carrier.

In the second aspect, the present invention provides a construction method suitable for the anti-freezing system of wading concrete structures in cold regions described in any one of the foregoing embodiments, including:

Install the unpowered heat exchange heat pipe on the flexible carrier;

The flexible carrier is installed in the airtight chamber of the vacuum protection body, so that the connecting piece connected with the flexible carrier protrudes out of the airtight chamber;

vacuumize the vacuum protection body;

The anti-freezing system of the wading concrete structure in the cold area is immersed in the water body, and the connecting piece is fixedly connected with the wading building.

The beneficial effects of the embodiments of the present invention are:

In summary, the anti-freezing system for wading concrete structures in cold regions provided by this embodiment is provided with non-powered heat exchange heat pipes on the flexible carrier, and both the flexible carrier and the non-powered heat exchange heat pipes are arranged on the vacuum protection body formed In a vacuum confined space. With such a design, components such as flexible carriers and unpowered heat exchange heat pipes located in a closed vacuum environment will not be corroded by water, and at the same time, the air in the cavity can be eliminated, the influence of air on heat exchange can be reduced, and the gap between the unpowered heat exchange heat pipe and the water body can be enhanced. heat transfer. The flexible carrier can bear the force of the whole system, and at the same time, it is convenient for structural replacement. In the cold season, the unpowered heat exchange heat pipe can take advantage of the natural characteristics that the temperature of the water body gradually increases with depth, and through the phase change heat transfer of the working fluid in the unpowered heat exchange heat pipe, realize the heat transfer from the deep high-temperature water body to the shallow water body to prevent wading Freezing of shallow water in the area around the structure. The non-powered heat exchange heat pipe can realize the automatic transmission of heat from the deep high-temperature water body of the wading structure in the cold season to the surface low-temperature water body without any manual operation, saving time and effort. At the same time, the unpowered heat exchange heat pipe utilizes the natural distribution characteristics of the water body temperature increasing from the surface layer to the deep layer in cold seasons and cold regions. It does not require any external power, is green and environmentally friendly, and effectively improves the time-consuming, laborious and energy-consuming deicing technology of water bodies around wading structures in cold regions. and low efficiency.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the anti-freezing system of the wading concrete structure in the cold area of the embodiment of the present invention;

Fig. 2 is a schematic structural view of a non-powered heat exchange heat pipe according to an embodiment of the present invention.

icon:

100-vacuum protection body; 200-flexible carrier; 210-outer frame; 220-flexible waterproof fiber grid blanket; 221-first side; 222-second side; 230-net bag; 300-connector; 400- Heat pipe without power heat exchange; 410-condensation pipe section; 420-insulation pipe section; 430-evaporation pipe section; 500-positioning piece.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is absolutely level or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Water conservancy projects such as reservoirs and dams in cold regions and traffic engineering infrastructure such as wading bridges in cold regions are widely distributed around the world. However, under the influence of multiple factors such as ice, high cold, and freeze-thaw, the problem of freezing damage to wading infrastructure structures in cold regions is prominent, especially structures within the fluctuation range of surface water bodies are significantly damaged by freezing damage, which seriously affects the health and service of wading infrastructure . At present, the surface water body deicing technology in the area around wading structures in cold regions is relatively lacking. The commonly used electric heating method, pressure jet method and compressed air blowing method use external power supply to heat or use external compressed air bubbles to move the deep water body to the surface. Achieve deicing effect. However, in the research of the inventors, it was found that the current deicing technologies all require external power supply and energy consumption or provide compressed air, etc. These technologies consume energy and are not environmentally friendly. And the deicing efficiency is low. Therefore, the problem of freezing damage to surface water around wading structures in cold regions cannot be effectively solved, which directly affects the safe operation of wading structures.

In view of this, the designer provides an anti-freezing system for wading concrete structures in cold areas, which is energy-saving and environmentally friendly, and can automatically perform deicing operations with less human intervention, saving time and effort, and high deicing efficiency.

Please combine Figure 1 and Figure 2, in this embodiment, the anti-freezing system of wading concrete structures in cold areas includes a vacuum protection body 100, a flexible carrier 200, a connector 300 and an unpowered heat exchange heat pipe 400, and the vacuum protection body 100 is set There is a closed chamber; the flexible carrier 200 and the non-powered heat exchange heat pipe 400 are both arranged in the closed chamber, the non-powered heat exchange heat pipe 400 is connected to the flexible carrier 200, and the connector 300 is connected to the flexible carrier 200 and extends out of the closed chamber.

The working principle of the anti-freezing system for wading concrete structures in cold areas provided by this embodiment is as follows:

The non-powered heat exchange heat pipe 400 can realize the automatic transmission of heat from the deep high-temperature water body of the wading structure in the cold season to the surface low-temperature water body, without any manual operation, saving time and effort, and low cost. At the same time, the non-powered heat exchange heat pipe 400 utilizes the natural distribution characteristics of the temperature increase from the surface layer to the deep layer of the water body in cold seasons and cold regions, without any external power, and is environmentally friendly. The flexible carrier 200 can realize the multi-directional transmission of the internal load of the anti-freezing system, improve the resistance of the anti-freezing system to the self-weight load and hydrodynamic load, and ensure the safety and stability of the anti-freezing system. The adoption of a flexible bearing structure not only facilitates the folding and transportation of the anti-freezing system, but also enables the anti-freezing system to flexibly adapt to the surface of various shapes of wading structures. The vacuum protection body 100 can protect the anti-freezing system from being soaked in water and improve the durability of the anti-freezing system. At the same time, the vacuum protection body 100 can also eliminate the air in the cavity, ensure efficient heat transfer between the non-powered heat exchange heat pipe 400 and the water body, improve heat exchange efficiency, and improve deicing effect. During assembly, the connecting piece 300 is used to connect with the wading structure, which is convenient for fixing, and the combination of the whole anti-freezing system and the wading structure is firm and reliable, not easy to fall off, and safe to use.

In this embodiment, optionally, the vacuum protection body 100 can be made of a thick PVC-coated waterproof cloth, so that the vacuum protection body 100 has a certain deformation ability, and can be closely attached to its internal components after vacuuming. combine. Specifically, the anti-freezing system of wading structures needs to be placed in the water body for a long time, and some types of water bodies even have strong chemical corrosion. In order to improve the anti-corrosion durability of the anti-freezing system, the flexible carrier 200, the The power heat exchange heat pipe 400 and other components are wrapped and protected, and the vacuum protection body 100 is subjected to a strict vacuuming operation, so that the vacuum protection body 100 is in close contact with the internal components, and the vacuum protection body 100 and the flexible carrier 200 can be co-deformed .

It should be noted that the vacuum protection body 100 may be a cuboid structure, and after the vacuuming is completed, its outer contour is a cuboid.

In this embodiment, optionally, the flexible carrier 200 includes an outer frame 210 and a flexible waterproof fiber grid blanket 220 . The outer frame 210 is a rectangular frame, and the flexible waterproof fiber grid blanket 220 is a rectangular block. The flexible waterproof fiber grid blanket 220 is arranged in the area surrounded by the outer frame 210 and is fixedly connected with the inner peripheral surface of the outer frame 210 . For example, the flexible waterproof fiber grid blanket 220 can be fixedly connected with the outer frame 210 by sewing. The outer frame 210 can enhance the structural strength of the flexible waterproof fiber mesh blanket 220, prevent the flexible waterproof fiber mesh blanket 220 from spreading from the edge, and prolong the service life. It should be noted that the connecting member 300 is fixedly connected with the outer frame 210 , and the number of connecting members 300 may be multiple and evenly spaced around the outer frame 210 . The connecting piece 300 can be hooked, and the connecting piece 300 can be fixedly connected to the outer frame 210 through structures such as screws. The non-powered heat exchange heat pipe 400 can be fixed on the flexible waterproof fiber grid blanket 220 .

Specifically, the flexible waterproof fiber mesh blanket 220 has two opposite board surfaces, each board surface is a rectangular surface, and the flexible waterproof fiber mesh blanket 220 has opposite first sides 221 and second sides 222 . A plurality of positioning pieces 500 are mounted on one of the boards, and the positioning pieces 500 may be clamps made of stainless steel. The number of positioning pieces 500 is set as required, and each heat pipe 400 for unpowered heat exchange can be co-located by a corresponding number of positioning pieces 500 . The flexible waterproof fiber grid blanket 220 is also provided with a plurality of net bags 230 , the number of the net bags 230 is consistent with the number of the non-powered heat exchange heat pipes 400 , and the plurality of net bags 230 are arranged close to the first side 221 . Each net bag 230 can be woven with basalt fiber composite reinforcement material or galvanized steel strand, and the net bag 230 can be plugged into the corresponding non-powered heat exchange heat pipe 400 . For example, in this embodiment, the flexible waterproof fiber mesh blanket 220 is provided with two mesh bags 230 , and the two mesh bags 230 are arranged at intervals along the length direction of the first side 221 .

In this embodiment, optionally, the non-powered heat exchange heat pipe 400 includes a condensation pipe section 410 , an adiabatic pipe section 420 and an evaporation pipe section 430 connected in sequence. After the non-powered heat exchange heat pipe 400 is installed on the flexible waterproof fiber grid blanket 220, the condensation pipe section 410 is close to the second side 222, the evaporation pipe section 430 is close to the first side 221, and the heat insulation pipe section 420 is located between the evaporation pipe section 430 and the condensation pipe section 410 . Both the heat insulating pipe section 420 and the evaporating pipe section 430 are straight pipes extending perpendicular to the first side 221 or the second side 222 . Further, the number of condensing pipe sections 410 is multiple, and one end of the multiple condensing pipe sections 410 is connected to the heat-insulating pipe section 420, and the other end has a distance, so that the area of the condensing pipe section 410 is wide, and the area for heat exchange with the water body can be increased. Thereby increasing the deicing area and improving the deicing efficiency. It should be understood that the number of condensation pipe sections 410 is set as required, which is not specifically limited in this embodiment.

When assembling the unpowered heat pipe, the end of the evaporation pipe section 430 is plugged into the corresponding net bag 230, and the evaporation pipe section 430, the heat insulation pipe section and the condensation pipe section 410 are all fixed on the flexible waterproof fiber net by using a plurality of positioning parts 500 On the grid blanket 220, the position of the non-powered heat exchange heat pipe 400 is firm and reliable, and is not easy to shift. When the anti-freezing system is placed in the water body, the first side 221 is downwards, the second side 222 is on the top, and the water body is placed vertically. At this time, the evaporation pipe section 430 extends vertically, because the evaporation pipe section 430 and the flexible waterproof fiber net The grid blanket 220 is tightly combined, and after the anti-freezing system cooperates with the wading building, the evaporation pipe section 430 extends vertically, and is not easy to shift, and can better transfer heat in the depth direction of the water body.

It should be noted that since the flexible waterproof fiber grid blanket 220 has two opposite board surfaces, the non-powered heat exchange heat pipe 400 can be assembled on each board surface, so as to increase the heat exchange area and improve the deicing efficiency.

This embodiment also provides a construction method of an antifreeze system for a wading concrete structure in a cold area, the method comprising the following steps:

Step S100 , fixing the flexible waterproof fiber grid blanket 220 on the outer frame 210 , and installing a plurality of connecting pieces 300 around the outer frame 210 .

Step S200, fixing a number of non-powered heat exchange heat pipes 400 at intervals on the flexible waterproof fiber grid blanket 220, inserting and fixing the bottom of the evaporation pipe section 430 of each non-powered heat exchange heat pipe 400 on the flexible waterproof fiber grid In the mesh bag 230 on the blanket 220, and along the heat insulation pipe section 420 and the condensation pipe section 410, the non-powered heat exchange heat pipe 400 is firmly fixed on the flexible waterproof fiber mesh blanket 220 with a positioning piece 500;

Step S300, put the flexible waterproof fiber grid blanket 220 installed with the unpowered heat exchange heat pipe 400 into the airtight chamber of the vacuum protection body 100, and place the connector 300 reserved on the flexible waterproof fiber grid blanket 220 in the vacuum chamber Outside the airtight chamber of the protective body 100, vacuumize the vacuum protective body 100, so that the vacuum protective body 100 is attached to the non-powered heat exchange heat pipe 400, the flexible waterproof fiber mesh blanket 220 and other components.

Step S400, after the vacuuming is completed, the anti-icing system is fixed on the wading structure by using the connector 300 .

Among them, in step S100, it is necessary to prepare the flexible waterproof fiber grid blanket 220 and the outer frame 210 first; Heat pipe 400.

The anti-freezing system for wading concrete structures in cold regions provided by this embodiment is energy-saving and environmentally friendly, and has a good deicing effect.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. An anti-freezing system for a wading concrete structure in a cold region, comprising:

the vacuum-pumping protection device comprises a vacuum-pumping protection body, a flexible carrier, a connecting piece and an unpowered heat exchange heat pipe, wherein the vacuum-pumping protection body is provided with a closed cavity; the flexible carrier and the unpowered heat exchange heat pipe are arranged in the closed cavity, the unpowered heat exchange heat pipe is connected with the flexible carrier, the vacuumizing protection body is attached to the outside of the flexible carrier, and the connecting piece is connected with the flexible carrier and extends out of the closed cavity;

the flexible carrier comprises an outer frame and a flexible waterproof fiber grid blanket, and the flexible waterproof fiber grid blanket is fixed on the outer frame and is positioned in an area surrounded by the outer frame; the connecting piece is connected with the outer frame; the number of the connecting pieces is multiple and the connecting pieces are uniformly distributed around the outer frame at intervals, and the connecting pieces are arranged as hooks;

the flexible waterproof fiber grid blanket is provided with two opposite plate surfaces, wherein a plurality of hoops are arranged on one plate surface, and each unpowered heat exchange heat pipe is positioned together through a corresponding number of hoops;

the flexible waterproof fiber grid blanket is characterized in that a plurality of mesh bags are further arranged on the flexible waterproof fiber grid blanket, the number of the mesh bags is consistent with that of the unpowered heat exchange pipes, the unpowered heat exchange pipes are inserted into the mesh bags, and the unpowered heat exchange pipes and the mesh bags are relatively fixed in the extending direction of the unpowered heat exchange pipes.

2. The cold area wading concrete structure anti-freezing system of claim 1, wherein:

the unpowered heat exchange heat pipe comprises a condensation pipe section, a heat insulation pipe section and an evaporation pipe section which are connected in sequence; the flexible carrier having opposite first and second sides, the evaporator tube section being disposed closer to the first side than the condenser tube section; the height of the first side is lower than the height of the second side when the flexible carrier is placed in a body of water.

3. The cold area wading concrete structure anti-freezing system of claim 2, wherein:

the number of the condensation pipe sections is multiple, one end of each condensation pipe section is communicated with each heat insulation pipe section, and the other ends of the condensation pipe sections are provided with intervals.

4. A method of construction, suitable for use in the cold zone wading concrete structure anti-freeze system of any one of claims 1-3, comprising:

the unpowered heat exchange heat pipe is arranged on a flexible carrier;

the flexible carrier is arranged in a closed cavity of the vacuumizing protection body, so that a connecting piece connected with the flexible carrier extends out of the closed cavity;

vacuumizing the vacuumizing protection body;

submerging the cold area wading concrete structure anti-freezing system in a water body, and fixedly connecting the connecting piece with the wading building.