Method for installing a deicing load on an engineered structure

Abstract

This invention provides a method for de-icing and unloading engineering structures, employing an unloader, a freezing device, and a heating device. The unloader includes a water-containing container and a float. The top of the container has an opening, the lower end of the float is above the water surface inside the container, and the upper end of the float extends beyond the top opening of the container. The container is equipped with a drain pipe and a drain valve. The freezing device includes a refrigeration unit and a freezing pipe. The freezing pipe extends into the container, and the refrigeration unit provides cooling to the water inside the container through the freezing pipe, converting the water into ice, causing the float to float and provide support. The container is positioned above the heating device, which heats the container to melt the ice inside. The melted water flows out through the drain pipe, and the ice sinks, causing the float to move downwards and achieve unloading. This method utilizes the freezing and subsequent melting of water within the device to support and unload structures. It is convenient to use, easy to control, and capable of handling and unloading extremely large loads.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a method for de-icing and unloading engineering structures. Background Technology

[0002] Unloading operations are frequently involved in civil engineering construction. For example, when temporary supports are used to assist in the installation of large-span steel structures, the temporary supports need to be removed after the steel structure is installed. In this case, the temporary supports must be unloaded before they can be removed.

[0003] Unloading is usually done using tools such as jacks and sandboxes, but it is difficult to achieve unloading of extremely large loads using traditional methods such as jacks. Summary of the Invention

[0004] The present invention aims to provide a method for de-icing and unloading engineering structures. It utilizes the freezing and reheating of water in the device to achieve support and unloading of the structure. It is convenient to use, easy to control, and can achieve de-icing and unloading of extremely large loads.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A method for de-icing and unloading during the installation of an engineering structure includes the following steps:

[0007] Step 1: Install a support device between the temporary support and the structure so that the temporary support can support the unfinished structure during the construction process;

[0008] Step 2: After the structure is formed, an engineering structure installation de-icing and unloading device is installed between the temporary support and the structure. The engineering structure installation de-icing and unloading device includes: an unloader, a freezing device, and a heating device. The unloader includes a water-containing container and a float. The top of the container has an opening. The lower end of the float is located on the water surface inside the container, and the upper end of the float extends out of the top opening of the container. The container is equipped with a drain pipe located at the bottom of the side wall of the container. The drain pipe is equipped with a drain valve. The freezing device includes a refrigeration device and a freezing pipe. The two ends of the freezing pipe are respectively connected to the refrigeration device. The freezing pipe extends into the container. The container is located above the heating device and water is poured into the container.

[0009] Step 3: The refrigeration device refrigerates the water in the container by supplying cold energy to the water in the container through the freezing pipe. The water in the container freezes and expands in volume, causing the float to push upward and press against the structure. Then, the supporting device is removed, so that the structure is completely supported by the de-icing and unloading device installed in the engineering structure.

[0010] Step 4: When unloading is required, open the drain valve and use the heating device to heat the container, so that the bottom of the ice in the container gradually melts. The melted water flows away through the drain pipe, the ice and float sink, and the structure gradually deforms.

[0011] Step 5: After the float of the de-icing and unloading device installed on the structure is completely detached from the structure, remove the de-icing and unloading device and temporary support from the structure to complete the unloading of the temporary support.

[0012] Preferably, in the above-mentioned method for de-icing and unloading of engineering structures, the refrigeration device, heating device, and drain valve are respectively connected to the control system.

[0013] Preferably, in the above-mentioned method for de-icing and unloading of engineering structures, a displacement limiter is provided at the top of the container. The float includes an upper part and a lower part, the outer diameter of the upper part is smaller than the outer diameter of the lower part. When the float moves up and down, the displacement limiter has a gap that allows the upper part to pass freely. The displacement limiter can restrict the lower part from passing freely. In order to avoid excessive volume expansion that could damage the structure, the maximum allowable displacement of the float is calculated in advance. The maximum allowable displacement of the float is equal to the height of the upper part minus the thickness of the displacement device.

[0014] Preferably, in the above-mentioned method for de-icing and unloading ice during the installation of engineering structures, a pressure sensor is provided on the surface of the displacement limiter that can contact the lower top surface of the float. The pressure sensor is connected to the control system and can send the pressure data it receives to the control system. When the pressure data measured by the pressure sensor is greater than 0, it indicates that the lower top surface of the float has reached the displacement limiter. In step 3, when the float triggers the displacement limiter, the displacement limiter sends a trigger signal to the control system. The control system stops the refrigeration device and, if necessary, starts the heating device to locally melt the ice.

[0015] Preferably, in the above-mentioned engineering structure installation de-icing and unloading method, a displacement sensor is provided on the upper side wall of the float. The displacement sensor is connected to the control system. The displacement sensor sends the displacement data of the float to the control system in real time. The control system can control the refrigeration system or heating device to adjust the vertical movement speed and movement range of the float based on the vertical movement speed and movement range of the float monitored by the displacement sensor.

[0016] Preferably, in the above-mentioned engineering structure installation ice melting and unloading method, in step 3, when the upward displacement of the float exceeds the set value, the control system stops the refrigeration of the freezing device, and if necessary, starts the heating device to locally melt the ice; in step 4, the control system adjusts the heating temperature of the heater according to the downward speed of the float monitored by the displacement sensor, controls the speed of ice melting in the container, and realizes the control of the unloading speed.

[0017] Preferably, in the above-mentioned method for de-icing and unloading engineering structures, in step 2, a coagulant is added to the water to accelerate the freezing speed; the coagulant is salt or sugar.

[0018] Preferably, in the above-mentioned method for de-icing and unloading engineering structures, in step 2, cotton is added to the water to improve the load-bearing capacity of the water after it freezes.

[0019] Preferably, in the above-mentioned method for de-icing and unloading of the engineering structure, the container is further provided with a water inlet pipe, the water inlet pipe is provided with a water inlet valve, and the water inlet valve is connected to the control system.

[0020] Preferably, in the above-described method for installing and unloading ice-melting components in an engineering structure, a liquid level sensor is provided inside the container, and the liquid level sensor is connected to the control system.

[0021] Preferably, the above-mentioned method for installing and unloading ice-melting components in an engineering structure further includes a temperature sensor, which is installed inside the container and connected to the control system.

[0022] Preferably, in the above-described method for de-icing and unloading engineering structures, the container is made of a flexible material, such as rubber, to accommodate the volume expansion and contraction during the freezing and melting process of water. If a rigid material is used, it should be able to withstand the pressure caused by the circumferential volume expansion after the internal water freezes.

[0023] Preferably, in the above-mentioned engineering structure installation de-icing and unloading method, the size of the container is designed according to the maximum load to be unloaded, and multiple containers can also be used in parallel to increase the unloading capacity.

[0024] Preferably, in the above-mentioned method for de-icing and unloading engineering structures, the heating device is an electric heater, and the heating temperature and speed are controlled by the electric heater.

[0025] As can be seen from the above-disclosed technical solutions, the beneficial effects of the present invention compared with the prior art are as follows:

[0026] In summary, the present invention provides an ice-melting and unloading method for engineering structure installation, employing an unloader, a freezing device, and a heating device. The unloader includes a water-containing container and a float. The top of the container has an opening, the lower end of the float is located on the water surface inside the container, and the upper end of the float extends out of the top opening of the container. The container is equipped with a drain pipe located at the bottom of the side wall of the container, and a drain valve is provided on the drain pipe. The freezing device includes a refrigeration device and a freezing pipe. The two ends of the freezing pipe are respectively connected to the refrigeration device and extend into the container. The refrigeration device provides cooling to the water in the container through the freezing pipe, converting the water in the container into ice, causing the float to float and provide support. The container is positioned above the heating device, which heats the container to melt the ice inside. The melted water flows out through the drain pipe, the ice sinks, and the float moves downward to achieve unloading. The engineering structure installation de-icing and unloading device provided by the present invention utilizes the water inside the device to freeze and then reheat to melt, thereby achieving support and unloading of the structure. It is convenient to use, easy to control, and can achieve de-icing and unloading of ultra-large loads. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an engineering structure for installing an ice-melting and unloading device according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of step 1 of the engineering structure installation, de-icing, and unloading method according to an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of step 2 of the engineering structure installation, de-icing, and unloading method according to an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of step 3 of the engineering structure installation, de-icing, and unloading method according to an embodiment of the present invention.

[0031] Figure 5 yes Figure 4 Enlarged schematic diagram of part A.

[0032] Figure 6 This is a schematic diagram of step 4 of the engineering structure installation, de-icing, and unloading method according to an embodiment of the present invention.

[0033] Figure 7 yes Figure 6 Enlarged schematic diagram of part B.

[0034] Figure 8 This is a schematic diagram of step 5 of the engineering structure installation, de-icing, and unloading method according to an embodiment of the present invention.

[0035] In the diagram: 1-Unloader, 1.1-Container, 1.2-Float, 1.2.1-Upper part, 1.2.2-Lower part, 1.3-Drain valve, 1.4-Water, 1.5-Ice, 2-Refrigeration device, 2.1-Refrigeration device, 2.2-Refrigeration pipe, 3-Heating device, 4-Displacement limiter, 5-Pressure sensor, 6-Displacement sensor, 7-Temporary support, 8-Structure, 9-Supporting device, 10-Control system. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical content and features of the present invention will be described in detail below with reference to the listed embodiments and the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention. For ease of description, the terms "upper" and "lower" used below are consistent with the upper and lower directions in the accompanying drawings, but this should not be construed as a limitation of the technical solution of the present invention.

[0037] Please see Figures 1 to 8 This embodiment describes a method for de-icing and unloading an engineering structure, comprising the following steps:

[0038] Step 1: Install a support device 9 between the temporary support 7 and the structure 8 so that the temporary support 7 can support the unfinished structure 8 during the construction of the structure 8.

[0039] Step 2: After the structure 8 is formed, an engineering structure installation de-icing and unloading device is installed between the temporary support 7 and the structure 8. The engineering structure installation de-icing and unloading device includes: an unloader 1, a freezing device 2, and a heating device 3. The unloader 1 includes a container 1.1 containing water 1.4 and a float 1.2. The top of the container 1.1 has an opening. The lower end of the float 1.2 is located on the water surface inside the container 1.1, and the upper end of the float 1.2 extends out of the top opening of the container 1.1. The container 1.1 is provided with a drain pipe, which is located at the bottom of the side wall of the container 1.1. The drain pipe is provided with a drain valve 1.3. The freezing device 2 includes a refrigeration device 2.1 and a freezing pipe 2.2. The two ends of the freezing pipe 2.2 are respectively connected to the refrigeration device 2.1. The freezing pipe 2.2 extends into the container 1.1. The container 1.1 is located above the heating device 3, and water is poured into the container 1.1.

[0040] Step 3: The refrigeration device 2 refrigerates the water in container 1.1 through the freezing pipe 2.2. The water 1.4 in container 1.1 freezes into ice 1.5 and expands in volume, causing the float 1.2 to push upward and press against the structure 8. Then, the supporting device 9 is removed, so that the structure 8 is completely supported by the de-icing and unloading device installed in the engineering structure.

[0041] Step 4: When unloading is required, open the drain valve 1.3 and use the heating device 3 to heat the container 1.1, so that the bottom of the ice in the container 1.1 gradually melts, the melted water flows away through the drain pipe, the ice and float 1.2 sink, and the structure 8 gradually deforms.

[0042] Step 5: After the structure 8 is completely detached from the float 1.2 of the de-icing and unloading device installed on the engineering structure, remove the de-icing and unloading device installed on the engineering structure and the temporary support 7 to complete the unloading of the temporary support 7.

[0043] Preferably, in the above-mentioned engineering structure installation de-icing and unloading method, the refrigeration device 2.1, the heating device 3, and the drain valve 1.3 are respectively connected to the control system 10.

[0044] Preferably, in the above-mentioned engineering structure installation de-icing and unloading method, a displacement limiter 4 is provided on the top of the container 1.1, and the float 1.2 includes an upper part 1.2.1 and a lower part 1.2.2. The outer diameter of the upper part 1.2.1 is smaller than the outer diameter of the lower part 1.2.2. When the float 1.2 moves up and down, the displacement limiter 4 has a gap that allows the upper part 1.2.1 to pass freely. The displacement limiter 4 can restrict the lower part 1.2.2 from passing freely. In order to avoid excessive volume expansion that could damage the structure 8, the maximum allowable displacement of the float 1.2 is calculated in advance. The maximum allowable displacement of the float 1.2 is equal to the height of the upper part 1.2.1 minus the thickness of the displacement device.

[0045] Preferably, in the above-mentioned method for de-icing and unloading ice during the installation of an engineering structure, a pressure sensor 5 is provided on the surface of the displacement limiter 4 that can contact the top surface of the lower part 1.2.2 of the float 1.2. The pressure sensor 5 is connected to the control system 10 and can send the pressure data it receives to the control system 10. When the pressure sensor 5 measures a pressure data greater than 0, it indicates that the top surface of the lower part 1.2.2 of the float 1.2 has reached the displacement limiter 4. In step 3, when the float 1.2 triggers the displacement limiter 4, the displacement limiter 4 sends a trigger signal to the control system 10. The control system 10 stops the refrigeration of the freezing device 2 and, if necessary, starts the heating device 3 to partially melt the ice.

[0046] Preferably, in the above-mentioned engineering structure installation de-icing and unloading method, a displacement sensor 6 is provided on the upper 1.2.1 side wall of the float 1.2. The displacement sensor 6 is connected to the control system 10. The displacement sensor 6 sends the displacement data of the float 1.2 to the control system 10 in real time. The control system 10 can control the refrigeration system or heating device 3 to adjust the vertical movement speed and movement range of the float 1.2 according to the vertical movement speed and movement range of the float 1.2 monitored by the displacement sensor 6.

[0047] Preferably, in the above-mentioned method for melting and unloading ice during the installation of engineering structures, in step 3, when the upward displacement of the float 1.2 exceeds the set value, the control system 10 stops the refrigeration of the freezing device 2, and if necessary, starts the heating device 3 to partially melt the ice; in step 4, the control system 10 adjusts the heating temperature of the heater according to the downward speed of the float 1.2 monitored by the displacement sensor 6, controls the melting speed of the ice in the container 1.1, and realizes the control of the unloading speed.

[0048] This embodiment provides a method for de-icing and unloading during the installation of an engineering structure. It employs an unloader 1, a freezing device 2, and a heating device 3. The unloader 1 includes a water-containing container 1.1 and a float 1.2. The top of the container 1.1 has an opening. The lower end of the float 1.2 is located on the water surface inside the container 1.1, and the upper end of the float 1.2 extends beyond the top opening of the container 1.1. A drain pipe is provided on the container 1.1, located at the bottom of the side wall of the container 1.1. A drain valve 1.3 is provided on the drain pipe. The freezing device 2 includes a refrigeration unit. 2.1 and a freezing pipe 2.2, both ends of which are connected to the refrigeration device 2.1. The freezing pipe 2.2 extends into the container 1.1, and the refrigeration device 2.1 provides cooling to the water in the container 1.1 through the freezing pipe 2.2, converting the water in the container 1.1 into ice, causing the float 1.2 to float and provide support. The container 1.1 is positioned above the heating device 3, which heats the container 1.1, melting the ice inside. The melted water flows out through the drain pipe, and the ice sinks, causing the float 1.2 to move downwards and unload. The engineering structure installation ice-melting and unloading device provided by this invention utilizes the freezing and reheating of water within the device to achieve support and unloading of the structure 8. It is convenient to use, easy to control, and capable of unloading extremely large loads. Preferably, in the above-mentioned engineering structure installation ice-melting and unloading method, in step 2, a coagulant is added to the water to accelerate the freezing speed. The coagulant is salt or sugar.

[0049] Preferably, in the above-mentioned method for de-icing and unloading engineering structures, in step 2, cotton is added to the water to improve the load-bearing capacity of the water after it freezes.

[0050] Preferably, in the above-described method for de-icing and unloading the engineering structure, the container 1.1 is further provided with a water inlet pipe, and the water inlet pipe is equipped with a water inlet valve. The water inlet valve is connected to the control system 10 to facilitate the filling of water into the container 1.1. Of course, the water inlet pipe can also be omitted, and water can be directly poured in.

[0051] Preferably, in the above-described method for de-icing and unloading the engineering structure, a liquid level sensor (not shown) is installed inside the container 1.1, and the liquid level sensor is connected to the control system 10. The liquid level sensor can measure the water level and send the water level data inside the container 1.1 to the control system 10 so that the management personnel can promptly know whether the water level inside the container 1.1 is normal.

[0052] Preferably, the above-described method for installing and unloading ice in an engineering structure further includes a temperature sensor (not shown), which is installed inside the container 1.1 and connected to the control system 10. The temperature sensor allows for timely acquisition of the temperature of the water or ice inside the container 1.1.

[0053] Preferably, in the above-described method for de-icing and unloading the engineering structure, the container 1.1 is made of a flexible material, such as rubber, to accommodate the volume expansion and contraction during the freezing and melting process of water. If a rigid material is used, it should be able to withstand the pressure caused by the circumferential volume expansion after the internal water freezes.

[0054] Preferably, in the above-mentioned engineering structure installation de-icing and unloading method, the size of the container 1.1 is designed according to the maximum load to be unloaded, or multiple containers 1.1 can be used in parallel to increase the unloading capacity.

[0055] Preferably, in the above-mentioned method for de-icing and unloading engineering structures, the heating device 3 is an electric heater, and the heating temperature and speed are controlled by the electric heater.

[0056] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A method for de-icing and unloading during the installation of an engineering structure, characterized in that, Includes the following steps: Step 1: Install a support device between the temporary support and the structure so that the temporary support can support the unfinished structure during the construction process; Step 2: After the structure is formed, an engineering structure installation de-icing and unloading device is installed between the temporary support and the structure. The engineering structure installation de-icing and unloading device includes: an unloader, a freezing device, and a heating device. The unloader includes a water-containing container and a float. The top of the container has an opening. The lower end of the float is located on the water surface inside the container, and the upper end of the float extends out of the top opening of the container. The container is equipped with a drain pipe located at the bottom of the side wall of the container. The drain pipe is equipped with a drain valve. The freezing device includes a refrigeration device and a freezing pipe. The two ends of the freezing pipe are respectively connected to the refrigeration device. The freezing pipe extends into the container. The container is located above the heating device and water is poured into the container. Step 3: The refrigeration device refrigerates the water in the container by supplying cold energy to the water in the container through the freezing pipe. The water in the container freezes and expands in volume, causing the float to push upward and press against the structure. Then, the supporting device is removed, so that the structure is completely supported by the de-icing and unloading device installed in the engineering structure. Step 4: When unloading is required, open the drain valve and use the heating device to heat the container, so that the bottom of the ice in the container gradually melts. The melted water flows away through the drain pipe, the ice and float sink, and the structure gradually deforms. Step 5: After the float of the de-icing and unloading device installed on the structure is completely detached from the structure, remove the de-icing and unloading device and temporary support from the structure to complete the unloading of the temporary support. The refrigeration device, heating device, and drain valve are respectively connected to the control system. A displacement limiter is provided at the top of the container. The float includes an upper part and a lower part. The outer diameter of the upper part is smaller than the outer diameter of the lower part. When the float moves up and down, the displacement limiter has a gap that allows the upper part to pass freely. The displacement limiter can restrict the lower part from passing freely. In order to avoid excessive volume expansion that could damage the structure, the maximum allowable displacement of the float is calculated in advance. The maximum allowable displacement of the float is equal to the height of the upper part minus the thickness of the displacement device. A pressure sensor is provided on the surface of the displacement limiter that can contact the lower top surface of the float. The pressure sensor is connected to the control system and can send the pressure data it receives to the control system. When the pressure data measured by the pressure sensor is greater than 0, it indicates that the lower top surface of the float has reached the displacement limiter. In step 3, when the float rises and triggers the displacement limiter, the displacement limiter sends a trigger signal to the control system. The control system stops the refrigeration device and, if necessary, starts the heating device to locally melt the ice. A displacement sensor is provided on the upper side wall of the float. The displacement sensor is connected to the control system. The displacement sensor sends the displacement data of the float to the control system in real time. The control system can control the cooling system or heating device to adjust the vertical movement speed and movement range of the float based on the vertical movement speed and movement range of the float monitored by the displacement sensor.

2. The method for de-icing and unloading engineering structures as described in claim 1, characterized in that, In step 3, when the upward displacement of the float exceeds the set value, the control system stops the refrigeration device and, if necessary, starts the heating device to partially melt the ice. In step 4, the control system adjusts the heating temperature of the heater according to the downward speed of the float monitored by the displacement sensor, controls the melting speed of the ice in the container, and realizes the control of the unloading speed.

3. The method for de-icing and unloading engineering structures as described in claim 1, characterized in that, In step 2, the freezing speed is accelerated by adding a coagulant to the water, wherein the coagulant is salt or sugar.

4. The method for de-icing and unloading engineering structures as described in claim 1, characterized in that, In step 2, cotton is added to the water to improve its load-bearing capacity after the water freezes.

5. The method for de-icing and unloading engineering structures as described in claim 1, characterized in that, It also includes a temperature sensor, which is disposed inside the container and connected to the control system.

6. The method for de-icing and unloading engineering structures as described in claim 1, characterized in that, The container is made of a flexible material, namely rubber.

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