A cooling method in a building construction process

Abstract

The present application belongs to the technical field of building construction, and particularly relates to a cooling method in the process of building construction, which comprises the following steps: obtaining stable refrigerant, and conveying the refrigerant in a gaseous state to a friction heating position through a pipeline for cooling treatment; the refrigerant needs to pass through a temperature controller and be mixed with hot air generated by the temperature controller before being conveyed to the friction heating position. The present application adopts the air cooling method to replace the water cooling method for temperature reduction, can cool the construction workpiece, and the temperature is controllable and applicable to the water-free cooling working condition to meet the construction requirements and ensure the construction safety.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a cooling method during building construction. Background Technology

[0002] Currently, the main solution to frictional heating is to eliminate and alleviate the generated heat through "water cooling" to prevent heat accumulation. This involves covering and flowing liquid water at room temperature over the frictionally heated components to absorb and exchange heat. The disadvantages of this cooling method are that it consumes a large amount of water, and the consumed water needs to be treated for discharge to meet environmental protection requirements, or collected in containers for recycling. In water-scarce areas, this method is costly and water sources are hard to find. Furthermore, it cannot achieve normal operating conditions when water cooling is not permitted.

[0003] In current construction projects involving static cutting and demolition of concrete components, diamond wire saws, hydraulic or electric wall saws, mining circular saws (road saws), and diamond water-jet drills containing industrial diamond particles are mainly used to cut concrete with beads and cutters (teeth) to achieve the purpose of disassembling concrete components. The cutting and disassembly of concrete components relies on the high-speed rotation of the cutting equipment driving the diamond particles on the beads and cutters to frictionally cut the concrete and reinforcing steel. This frictional cutting process generates a large amount of heat. If cooling is not implemented, the temperature at the friction points will quickly reach approximately 1100℃, causing the metal matrix to soften due to the high temperature. The diamond particles embedded in the matrix will then detach and become unusable, making the cutting operation unsustainable. Simultaneously, the beads and cutters on the cutting rope and cutting disc may also detach from the matrix due to reduced adhesion caused by the high temperature, or the steel wire rope may soften and break, potentially creating serious safety hazards and serious personal injury accidents. From the invention of stone and concrete cutting machinery such as mining circular saws, wire saws, hydraulic or electric wall saws, and diamond water-jet drills, the cooling method used has always been "water cooling" to address the heat generation problem of frictional cutting, which has effectively solved this issue. However, with the development of static cutting and demolition engineering construction technology and the increasing demands for construction techniques in recent years, "water cooling" is no longer sufficient to meet the construction conditions and requirements in some static concrete demolition projects. The following are examples of the shortcomings of "water cooling":

[0004] Case 1: Demolition of a provincial highway bridge over a highway. Due to road expansion needs, the highway operator and supervisor required that during the cutting and demolition of the bridge beams, normal traffic flow must be ensured, with no road closures, road blockages, or detours. No water droplets were allowed to fall onto the highway surface during the cutting and demolition process. If wastewater dripped onto the lanes, creating a slippery surface, or if it fell onto the windshields of speeding vehicles, it could obstruct the driver's view or startle them, potentially causing serious safety hazards and accidents. Constructing drainage channels under the bridge beams for drainage and waterproofing would be costly and impractical due to limitations in the distance between the bridge beams and the ground. If the bridge deck was wide and the span large, the difficulty of construction might increase to the point of being practically impossible. The construction and demolition of drainage channels would also interfere with normal traffic and increase safety hazards. Large areas of waterproof tarpaulins would be severely affected by wind during typhoons and storms, posing a significant safety risk.

[0005] Case 2: Demolition of a Highway Bridge Overpassing a Railway Line. Due to road expansion, the old overpass over the railway line needed to be demolished and rebuilt. The bridge was a simply supported hollow slab beam bridge, with each span consisting of 14 hollow slab beams arranged side-by-side to form a complete bridge deck. Demolition required cutting the original 14 hollow slab beams along the hinge joints, and then cutting them laterally at both ends of the beams to remove them sequentially. Because the high-voltage lines on the railway line range from 20 kV to 27,000 kV, the cooling water flowing down the hinge joints during cutting could cause serious ultra-high voltage electric shock accidents and road closures. Therefore, the existing method for demolishing old overpasses on railway lines is to only carry out cutting operations within a designated "window period" (commonly known as a "given window") provided by the railway line. This "window period" is limited to once a day, lasting 90 minutes each time. In extreme cases of tight transport capacity on busy lines, there may be no "window period" for more than ten days, resulting in severely discontinuous beam cutting operations, low construction efficiency, and high construction costs.

[0006] Case 3: Cooling of brake components in heavy-duty trucks during operation. Heavy-duty trucks use their brakes extensively during operation, which easily leads to friction and heat generation. Current solutions primarily employ water cooling. However, a drawback is that the cooling water wets the road surface, creating a slippery surface. In winter or in cold regions where temperatures drop below 0°C, the water easily condenses into icicles, reducing friction between the wheels and the road surface and creating a safety hazard where vehicles cannot stop properly when their wheels are on the icicles. Summary of the Invention

[0007] In view of the above-mentioned shortcomings in the existing technology, the present invention provides a cooling method in the construction process to solve the above-mentioned problems.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A cooling method during building construction, the method comprising the following steps:

[0010] Obtain a stable refrigerant.

[0011] The refrigerant is delivered in a vaporized state through pipelines to the friction-generating parts for cooling.

[0012] In the cooling process, the refrigerant needs to be delivered to the friction-heating parts after passing through a temperature controller and mixing with the hot air generated by the temperature controller.

[0013] Furthermore, the temperature after the refrigerant mixes with the hot air generated by the temperature controller is -30℃ to 0℃;

[0014] Furthermore, the refrigerant is any one of liquid nitrogen, liquid oxygen, liquid argon, liquid helium, liquid hydrogen, or dry ice;

[0015] Furthermore, the friction-generating area is the cut section of the concrete.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention uses air cooling instead of water cooling for cooling, which can cool the workpiece under construction. The temperature is controllable and it is applicable to waterless cooling conditions to meet construction requirements and ensure construction safety. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to embodiments.

[0019] Example:

[0020] A cooling method during building construction according to the present invention includes:

[0021] Step S1: First, obtain a constant refrigerant, including but not limited to liquid nitrogen, liquid oxygen, liquid argon, liquid helium, liquid hydrogen, dry ice, etc.

[0022] Step S2: The refrigerant is delivered to the temperature controller through the cryogenic pipe;

[0023] Step S3: The refrigerant and hot air in the temperature controller are mixed to bring the temperature of the mixture of refrigerant and hot air to the operating conditions of -30℃ to 0℃.

[0024] Step S4: Connect the low-temperature braided tube to the metal nozzle, and connect the air inlet at the other end to the outlet of the temperature controller. Pump out the refrigerant that has reached the required temperature using an air pump, and spray the low-temperature gas from the nozzle.

[0025] Step S5: Aim the nozzle at the friction-generated area, and the sprayed low-temperature gas will absorb heat from the heated area.

[0026] The method of this invention is applicable to a variety of working conditions and scenarios, such as cooling the heat generated during concrete cutting, cooling the heat generated during metal and non-metal cutting, cooling the heat generated by friction during heavy vehicle braking, and cooling the braking system during aerospace vehicle landing.

[0027] The above are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A cooling method during building construction, the method comprising the following steps: Obtain a stable refrigerant. The refrigerant is delivered in a vaporized state through pipelines to the friction-generating parts for cooling. Its features are: In the cooling process, the refrigerant needs to be delivered to the friction-heating part after passing through a temperature controller and mixing with the hot air generated by the temperature controller.

2. The cooling method during building construction as described in claim 1, characterized in that: The temperature after the refrigerant mixes with the hot air generated by the temperature controller is -30℃ to 0℃.

3. The cooling method during building construction as described in claim 1, characterized in that: The refrigerant is any one of liquid nitrogen, liquid oxygen, liquid argon, liquid helium, liquid hydrogen, or dry ice.

4. A cooling method during building construction as described in claim 1, characterized in that: The friction-generating area is the cut part of the concrete.