A radiation shielding wall structure and construction method

Abstract

This invention relates to the field of building construction technology, and in particular to a radiation-shielding wall structure and construction method. The radiation-shielding wall structure includes a concrete wall body and a water circulation system. The water circulation system includes a circulating water pipe and a first water pump. The circulating water pipe is embedded in the concrete wall body and has an inlet and an outlet. The first water pump is located at the inlet of the circulating water pipe and is used to pump a heat exchange solution into the circulating water pipe, allowing the solution to circulate within the pipe before being discharged from the outlet. Several replenishment water pipes are also spaced along the circulating water pipe, each equipped with a valve. A second water pump is connected to the end of each replenishment water pipe. In this invention, the heat exchange solution injected through the replenishment water pipes neutralizes the existing heat exchange solution in the circulating water pipe, further reducing the temperature difference between the heat exchange solution at the inlet and outlet of the circulating water pipe.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a radiation shielding wall structure and construction method. Background Technology

[0002] A medical linear accelerator is a medical device that uses microwave electromagnetic fields to accelerate electrons and create linear motion trajectories. It is used for radiotherapy of tumors or other lesions in patients. It produces high-energy X-rays and electron beams, and features high dose rate, short irradiation time, large irradiation field, good dose uniformity and stability, and a small penumbra. During operation, medical linear accelerators generate radiation including electron beams, X-rays, gamma rays, and neutron rays. Therefore, the room housing a medical linear accelerator requires special radiation protection measures to prevent radiation leakage and environmental radiation pollution.

[0003] Currently, medical linear accelerator room shielding against radiation is achieved mainly through two methods during construction: one is by adding heavy aggregates, such as barite, to the concrete, which physically isolates and prevents radiation leakage; the other is by thickening the concrete wall panels in the engineering design to improve the radiation shielding performance of the room structure. The wall panels of this type of radiation shielding structure are generally 1-3m thick. According to the provisions of my country's "Standard for Construction of Mass Concrete" GB50496-2018, the wall panels of this type of radiation shielding structure already fall under the category of mass concrete.

[0004] In the construction of large-volume concrete, due to the large cross-sectional thickness and relatively small surface area coefficient of the concrete structure, the heat generated by hydration during the concrete solidification process will accumulate inside the structure and will not be easily dissipated. This will cause the temperature inside the concrete to rise higher and higher. At the same time, the cooling rate of the surface area of ​​the large-volume concrete is greater than that of the internal area. This will cause a large temperature difference between the inside and the surface of the concrete component during construction. When the temperature stress exceeds the tensile strength of the concrete at that time, it may cause concrete cracks, which will then have an adverse effect on the radiation protection performance of the computer room structure.

[0005] To address the aforementioned issues, existing technologies for large-volume concrete construction typically employ a "internal cooling and external insulation" temperature control method. This involves embedding condensate pipes inside the concrete, continuously circulating condensate through these pipes during the setting process to remove accumulated heat. Additionally, insulating formwork is used on the outside of the concrete for heat preservation and curing, thus ensuring the required temperature difference between the inner and outer surfaces. However, shortcomings remain, as detailed below:

[0006] In existing technologies, condensate pipes typically have one outlet and one inlet. When cooling the concrete interior, condensate enters through the inlet, passes through the entire cooling circuit, and exits through the outlet. In this configuration, the condensate temperature rises significantly as it flows to the outlet side of the condensate pipe, resulting in low cooling efficiency on the concrete side near the outlet. This leads to a large temperature difference between the inlet and outlet sides of the concrete, increasing the probability of cracks forming during the solidification of large-volume concrete and negatively impacting the radiation shielding performance of the computer room structure.

[0007] Therefore, how to improve the cooling efficiency of the concrete near the outlet of the condensate pipe, reduce the large temperature difference between the concrete near the inlet and the concrete near the outlet, and thus reduce the probability of cracks forming during the concrete solidification process, is an urgent problem to be solved in the existing technology. Summary of the Invention

[0008] The purpose of this invention is to address the problem in existing technologies of how to improve the cooling efficiency of the concrete side near the condensate pipe outlet, reduce the large temperature difference between the concrete side near the inlet and the concrete side near the outlet, thereby reducing the probability of cracks occurring during concrete solidification, and to provide a radiation-proof wall structure and construction method.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] A radiation-shielding wall structure includes a concrete wall body and a water circulation system. The water circulation system includes a circulating water pipe and a first water pump. The circulating water pipe is embedded in the concrete wall body and has a serpentine pipe structure. The heat exchange plane formed by the circulating water pipe coincides with or is parallel to the central axis of the concrete wall body. The area of ​​the heat exchange plane formed by the circulating water pipe matches the surface area of ​​the radiation-shielding surface formed by the concrete wall body. The circulating water pipe has an inlet end and an outlet end. The first water pump is located at the inlet end of the circulating water pipe and is used to pump a heat exchange solution into the circulating water pipe, circulate the heat exchange solution in the circulating water pipe, and then discharge it from the outlet end. Along the horizontal direction of the concrete wall body, a plurality of water replenishment pipes are also arranged at intervals along the circulating water pipe. Each water replenishment pipe is equipped with a switch valve, and a second water pump is connected to the end of each water replenishment pipe. The second water pump is started and opens the switch valve, allowing the heat exchange solution to be pumped from the water replenishment pipe into the circulating water pipe.

[0011] Preferably, the water circulation system further includes a water storage tank and a wastewater tank, the first water pump and the second water pump are connected to the water storage tank, and the outlet end of the circulating water pipe is connected to the wastewater tank.

[0012] Preferably, a temperature sensor is also provided at the connection end between the water supply pipe and the circulating water pipe, and the temperature sensor is used to detect the temperature of the heat exchange solution in the circulating water pipe.

[0013] Preferably, the water supply pipe is located at the top of the circulating water pipe.

[0014] Preferably, the water supply pipe is made of a transparent material.

[0015] Preferably, the top of the circulating water pipe protrudes above the top surface of the concrete wall body, and the height at which the circulating water pipe protrudes above the top surface of the concrete wall body matches the thickness of the roof slab of the electron linear accelerator room.

[0016] Preferably, the circulating water pipes are arranged in multiple units, and adjacent circulating water pipes are arranged in parallel and spaced apart within the concrete wall body.

[0017] Preferably, the crest and trough structures of adjacent circulating water pipes are staggered by 1 / 4 cycle.

[0018] Preferably, based on the above method, the circulating water pipe is further provided with a number of finned plates at intervals. The finned plates are configured as long strip plate-shaped structures. The finned plates extend in the direction of the heat exchange plane formed by the adjacent circulating water pipes, and the heat exchange plane formed by the finned plates is perpendicular to the longitudinal steel bars inside the concrete wall body.

[0019] Preferably, the finned plate includes a support section and a deformable section. The support section has a hollow interior and is connected to the flow channel of the circulating water pipe. The deformable section is located at the end of the support section and is made of a thin sheet of metal material.

[0020] Preferably, the support section is further provided with a plurality of ball bearings, the width of the opening where the support section connects to the circulating water pipe is smaller than the diameter of the ball bearings, and a baffle plate is provided on the inner wall of the circulating water pipe. The baffle plate is used to create turbulence when the heat exchange solution flows through the opening of the support section, so that the ball bearings can impact the inner wall of the support section under the action of the turbulence.

[0021] Preferably, the inner wall of the support section is provided with a rough surface.

[0022] Preferably, the baffle is connected to the opening where the support section connects to the circulating water pipe via a damping shaft. The baffle has an open state and a closed state. When the impact force generated by the heat exchange solution in the circulating water pipe is greater than the damping force of the damping shaft, the baffle deflects in the direction of heat exchange solution flow to form an open state. In the open state, the baffle forms an acute angle of less than 30° with the opening plane of the support section. When the impact force generated by the heat exchange solution in the circulating water pipe is less than the damping force of the damping shaft, the baffle forms a closed state, and the opening where the support section connects to the circulating water pipe is closed by the baffle.

[0023] Preferably, the inlet end of the circulating water pipe is further provided with an air pump assembly, which includes an air pump body, an air delivery pipe and a solenoid valve. One end of the air delivery pipe is connected to the inlet end of the circulating water pipe and the other end is connected to the air pump body. The solenoid valve is provided on the air delivery pipe and is used to control the opening or closing of the air passage of the air delivery pipe.

[0024] A method for constructing a radiation shielding wall includes the following steps:

[0025] Step 1: Reinforcement binding of concrete wall body: Bind the reinforcement of concrete wall body according to the construction drawings;

[0026] Step 2, Water Circulation System Installation: After the concrete wall reinforcement is tied, the water circulation system is installed, including the laying of circulating water pipes, the laying of temperature sensors, the installation of water storage tanks and wastewater tanks, and the installation of water pumps.

[0027] Step 3: Template Installation: Install the template and reinforcement system to form the concrete pouring cavity;

[0028] Step 4: Concrete pouring: Pour concrete into the concrete pouring cavity set up in Step 3.

[0029] Step 5: Temperature control of the concrete wall body: Use a water circulation system to control the temperature difference between the inner and outer surfaces of the concrete wall body during the concrete setting process, thereby reducing the temperature stress generated in the concrete wall body.

[0030] Step 6: Seal the circulating water pipe: Use M10 expansive cement mortar to grout and fill the circulating water pipe.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. The radiation-shielding wall structure of the present invention includes a plurality of water replenishment pipes spaced at intervals along the horizontal direction of the circulating water pipe, and a second water pump cooperating with the water replenishment pipes. This allows heat exchange solution to be injected into different parts of the circulating water pipe through the water replenishment pipes, thus reducing the flow path of the heat exchange solution within the circulating water pipe and effectively shortening the heat exchange time required for the heat exchange solution to flow through the circulating water pipe. This reduces the temperature difference between the heat exchange solution at the inlet and outlet of the circulating water pipe. Furthermore, the heat exchange solution injected through the water replenishment pipes also neutralizes the original heat exchange solution in the circulating water pipe, further reducing the temperature difference between the heat exchange solution at the inlet and outlet of the circulating water pipe. Through the above methods, the cooling rate of various parts of the concrete wall body can be made more uniform, thereby effectively suppressing the formation of temperature cracks during the construction of large-volume concrete and improving the radiation protection performance of the medical linear accelerator room structure.

[0033] 2. The radiation-shielding wall structure of the present invention features a hollow internal structure in the supporting section, which improves the heat exchange efficiency of the finned plates. A deformable section is provided at the end of the supporting section. During concrete pouring, the deformable section bends downwards under the pressure of the concrete aggregate. With the cooperation of several finned plates mounted on multiple circulating water pipes, a metal isolation barrier structure is formed inside the concrete wall body, resulting in superior radiation protection performance. Furthermore, the finned plates on adjacent circulating water pipes are staggered, and the distance between the staggered finned plates on adjacent circulating water pipes corresponds to the maximum bending amount of the deformable section. This structural arrangement increases the area of ​​the metal isolation barrier structure formed inside the concrete wall body, further improving the radiation protection performance of the concrete wall body of the present invention.

[0034] 3. The radiation shielding wall structure of the present invention includes a plurality of ball bearings arranged in the support section and a baffle plate arranged on the inner wall of the circulating water pipe. The baffle plate is used to create turbulence when the heat exchange solution flows through the opening of the support section. The ball bearings can then impact the inner wall of the support section under the influence of the turbulence, causing the support section and the deformation section to vibrate at a certain frequency. Under the action of vibration, the fluidity of the concrete is enhanced, the cavity formed below the finned plate can be filled, and the density of the concrete at the finned plate area is increased, thereby further enhancing the radiation shielding performance of the concrete wall body of the present invention.

[0035] 4. In the radiation shielding wall structure of the present invention, the baffle plate is connected to the opening where the support section connects to the circulating water pipe via a damping pivot. Before the concrete sets, the flow rate of the heat exchange solution in the circulating water pipe is increased so that the impact force generated by the heat exchange solution is greater than the damping force of the damping shaft. The baffle plate is in an open state, so that the heat exchange solution forms turbulence when flowing through the opening of the support section. The ball bearings, driven by the turbulence, can impact the inner wall of the support section, causing the support section and the deformation section to vibrate at a certain frequency. Under the action of vibration, the fluidity of the concrete is enhanced, the cavity formed below the finned plate can be filled, and the density of the concrete in the finned plate area is increased, thereby further enhancing the radiation protection performance of the concrete wall body of the present invention. After the concrete sets, the flow rate of the heat exchange solution in the circulating water pipe is slowed down so that the impact force generated by the heat exchange solution is less than the damping force of the damping shaft. The baffle plate is in a closed state, and the opening connecting the support section and the circulating water pipe is closed by the baffle plate. The ball bearings cannot collide with the inside of the support section, avoiding vibration of the finned plate, thereby preventing the strength of the concrete from being reduced due to vibration after final setting. Furthermore, in this embodiment, by regularly changing the flow rate of the heat exchange solution, the baffle can be regularly switched between open and closed states. Thus, when the heat exchange solution flows through the baffle location, a "water hammer effect" is generated due to the change in the cross-section of the circulating water pipe. Under the influence of the "water hammer effect," the circulating water pipe as a whole will generate stronger vibrations, thereby better filling the cavities inside the concrete, further improving the density and strength of the concrete, and further enhancing the radiation protection performance of the concrete wall body of the present invention. Attached Figure Description

[0036] Figure 1 This is an isometric structural diagram of a radiation shielding wall structure;

[0037] Figure 2 yes Figure 1 A schematic diagram of the structure of A in the middle;

[0038] Figure 3 This is a front view structural diagram of a radiation shielding wall structure;

[0039] Figure 4 This is a schematic diagram of the right-side view of a radiation-proof wall structure.

[0040] Figure 5 This is a schematic diagram of a radiation shielding wall structure in which the deformable section of the finned plate is deformed by the pressure of concrete.

[0041] Figure 6 This is a top view of the circulating water pipe structure.

[0042] Figure 7 This is a schematic diagram of the structure of the circulating water pipe embedded in the concrete wall.

[0043] Figure 8 This is a schematic diagram of the cross-sectional structure of the finned plate;

[0044] Figure 9 This is a schematic diagram of the structure where the baffle is pushed open by the heat exchange solution;

[0045] Figure 10 This is a schematic diagram of the construction process for a radiation-shielding wall construction method.

[0046] The markings in the diagram are: 1-Concrete wall body, 2-Water circulation system, 3-Circulating water pipe, 4-First water pump, 5-Make-up water pipe, 6-Second water pump, 7-Switch valve, 8-Water storage tank, 9-Waste water tank, 10-Fin plate, 11-Support section, 12-Deformation section, 13-Ball bearing, 14-Break plate, 15-Air pump assembly, 16-Air pump body, 17-Air supply pipe, 18-Solenoid valve. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings.

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0050] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Example 1

[0054] like Figures 1 to 7 As shown, the radiation shielding wall structure of the present invention includes a concrete wall body 1 and a water circulation system 2. The water circulation system 2 includes a circulating water pipe 3 and a first water pump 4. The circulating water pipe 3 is embedded in the concrete wall body 1 and has a serpentine pipe structure. The heat exchange plane formed by the circulating water pipe 3 coincides with or is parallel to the central axis of the concrete wall body 1. The area of ​​the heat exchange plane formed by the circulating water pipe 3 matches the surface area of ​​the radiation shielding surface formed by the concrete wall body 1. The circulating water pipe 3 has an inlet end and an outlet end. The first water pump 4 is located at the inlet end of the circulating water pipe 3. The first water pump 4 is used to pump the heat exchange solution into the circulating water pipe 3 and circulate the heat exchange solution in the circulating water pipe 3 before discharging it from the outlet end. Along the horizontal direction of the concrete wall body 1, a number of water supply pipes 5 are also arranged at intervals on the circulating water pipe 3. A switch valve 7 is provided on the water supply pipe 5. The end of the water supply pipe 5 is also connected to a second water pump 6. The second water pump 6 is started and the switch valve 7 is opened, so that the heat exchange solution can be pumped from the water supply pipe 5 into the circulating water pipe 3.

[0055] The radiation-shielding wall structure described in this invention employs a plurality of water replenishment pipes 5 spaced at intervals along the horizontal direction of the circulating water pipe 3, and a second water pump 6 cooperating with the water replenishment pipes 5. This allows heat exchange solution to be injected into different parts of the circulating water pipe 3 through the water replenishment pipes 5, thereby reducing the flow path of the heat exchange solution within the circulating water pipe 3 and effectively shortening the heat exchange time required for the heat exchange solution to flow through the circulating water pipe 3. This reduces the temperature difference between the heat exchange solution at the inlet and outlet of the circulating water pipe 3. Furthermore, the heat exchange solution injected through the water replenishment pipes 5 also neutralizes the original heat exchange solution within the circulating water pipe 3, further reducing the temperature difference between the heat exchange solution at the inlet and outlet of the circulating water pipe 3. Through the above methods, the cooling rate of various parts of the concrete wall body 1 can be made more uniform, thereby effectively suppressing the formation of temperature cracks during the construction of large-volume concrete and improving the radiation protection performance of the medical linear accelerator room structure.

[0056] Specifically, in this embodiment, the heat exchange solution is water; the circulating water pipe 3 is made of galvanized pipe with an inner diameter of 50mm. The circulating water pipe 3 is tied to the steel reinforcement skeleton inside the concrete wall body 1. After the circulating water pipe 3 is installed, it needs to undergo a water flow test to prevent blockage or leakage during concrete pouring. In this embodiment, before pouring concrete, the circulating water pipe 3 needs to be filled with heat exchange solution. After the concrete initially sets, the first water pump 4 is started to make the heat exchange solution flow in the circulating water pipe 3, reducing the temperature difference between the inside and outside of the concrete wall body 1. During this process, the temperature of the heat exchange solution at the inlet of the circulating water pipe 3 and the temperature of the heat exchange solution at the outlet of the circulating water pipe 3 need to be monitored in real time. When the difference between the inlet and outlet water temperatures is greater than 6℃, the second water pump 6 needs to be started and the switch valve 7 needs to be opened. The water supply pipe 5 injects heat exchange solution into the circulating water pipe 3. By reducing the flow path of the heat exchange solution within the circulating water pipe 3, the required heat exchange time for the heat exchange solution to flow through the circulating water pipe 3 is shortened, thereby reducing the temperature difference between the heat exchange solution on the inlet side and the outlet side of the circulating water pipe 3; and / or, by injecting a lower temperature heat exchange solution into the outlet side of the circulating water pipe 3 through the water supply pipe 5 to neutralize the original heat exchange solution in the circulating water pipe 3, the temperature difference between the heat exchange solution on the inlet side and the outlet side of the circulating water pipe 3 is reduced; when the temperature difference between the inner surface of the concrete wall body 1 is not greater than 15 degrees Celsius, the cooling operation can be suspended. After the cooling is completed, the circulating water pipe 3 should be grouted and sealed in a timely manner. In actual construction, M10 expansive cement mortar is generally used for grouting and filling.

[0057] Example 2

[0058] like Figure 1 As shown, the radiation shielding wall structure of the present invention, based on the above method, further includes a water circulation system 2 that also includes a water storage tank 8 and a wastewater tank 9. The first water pump 4 and the second water pump 6 are connected to the water storage tank 8, and the outlet end of the circulating water pipe 3 is connected to the wastewater tank 9.

[0059] The wastewater tank 9 in this embodiment prevents the indiscriminate discharge of heat exchange solution, which could damage and pollute the construction environment. Simultaneously, the wastewater tank 9 allows for the recycling of the heat exchange solution, reducing construction costs to some extent. In this embodiment, the water storage tank 8 facilitates temperature adjustment of the heat exchange solution, improving the practicality of the invention in real-world applications.

[0060] Furthermore, in another embodiment, the water storage tank 8 is equipped with multiple independent water chambers. Thus, the temperature of the heat exchange solution stored in each water chamber can be independently adjusted. In actual construction, different temperatures of heat exchange solutions can be injected into the circulating water pipe 3 more quickly according to the temperature changes of the concrete wall body 1, further improving the practicality of the invention in actual use.

[0061] Example 3

[0062] like Figures 1 to 7 As shown, in addition to the above-mentioned method, the radiation-proof wall structure of the present invention further includes a temperature sensor at the connection end between the water supply pipe 5 and the circulating water pipe 3. The temperature sensor is used to detect the temperature of the heat exchange solution in the circulating water pipe 3.

[0063] The temperature sensor described in this embodiment can monitor the temperature of the heat exchange solution at different parts of the circulating water pipe 3 in real time. In actual construction, based on the temperature data detected by the temperature sensor, a heat exchange solution with a suitable temperature can be injected into different parts of the water supply pipe 5, thereby reducing the temperature difference between different parts of the circulating water pipe 3. This ensures that the cooling rate of each part of the concrete wall body 1 is consistent, further suppressing the formation of temperature cracks during large-volume concrete construction and improving the radiation protection performance of the medical linear accelerator room structure.

[0064] As a preferred embodiment, based on the above method, the water supply pipe 5 is further disposed at the top of the circulating water pipe 3.

[0065] In the construction of medical linear accelerator rooms, given that the walls and ceiling are large-volume concrete structures, the concrete for the walls and ceiling is typically poured separately to ensure the quality of the walls and ceiling and to reduce construction difficulty. In this embodiment, utilizing this construction characteristic, the water supply pipe 5 is placed on top of the circulating water pipe 3. During the pouring of the ceiling concrete, the water supply pipe 5 is buried by the ceiling concrete, avoiding the formation of sealing or repair marks on the concrete wall body 1 and improving the quality of the concrete wall body 1. Furthermore, placing the water supply pipe 5 on top of the circulating water pipe 3 allows the heat exchange solution injected through the water supply pipe 5 to diffuse more quickly within the circulating water pipe 3, increasing the speed at which the present invention regulates the temperature of the heat exchange solution within the circulating water pipe 3.

[0066] As a preferred embodiment, based on the above method, the water supply pipe 5 is further made of a transparent material.

[0067] Specifically, in this embodiment, the water supply pipe 5 is made of transparent PVC material. With this structural design, during the sealing process of the circulating water pipe 3, the amount of cement mortar flowing into the water supply pipe 5 can be accurately determined to be sufficient to fill the top of the circulating water pipe 3. Specifically, a judgment mark is provided on the water supply pipe 5, with a straight-line distance of 5cm from the connection point between the water supply pipe 5 and the circulating water pipe 3. During the sealing process of the circulating water pipe 3, if cement mortar flows into the water supply pipe 5 and its height exceeds the judgment mark, it is determined that the cement mortar is fully filled; otherwise, it is not full, and more cement mortar needs to be poured into the circulating water pipe 3. This structural design ensures the construction quality of the radiation-proof wall structure of this invention and further improves the radiation-proof performance of the medical linear accelerator room structure.

[0068] As a preferred embodiment, based on the above method, the top of the circulating water pipe 3 is exposed above the top surface of the concrete wall body 1, and the height of the circulating water pipe 3 above the top surface of the concrete wall body 1 matches the thickness of the roof plate of the electron linear accelerator room.

[0069] In this embodiment, it is considered that both the roof slab and walls of the machine room fall under the category of large-volume concrete. In actual construction, the concrete in these two parts is usually poured separately. This construction method can lead to a significant temperature difference at the junction of the roof slab and the walls during the pouring process, increasing the risk of cracking in the roof slab. Therefore, in this embodiment, the top of the circulating water pipe 3 is exposed above the top surface of the concrete wall body 1. During the pouring of the roof slab concrete, the circulating water pipe 3 raises the temperature of the top of the concrete wall body 1, reducing the temperature difference at the junction of the roof slab and the walls, thereby reducing the risk of cracking in the roof slab and further improving the radiation protection performance of the medical electron linear accelerator machine room structure. Meanwhile, in this embodiment, the top of the circulating water pipe 3 is exposed above the top surface of the concrete wall body 1. During the construction of the machine room roof slab, the top of the circulating water pipe 3 is anchored into the concrete of the machine room roof slab, making the roof slab and the wall of the machine room more tightly connected, and further improving the radiation protection performance of the machine room structure of the medical electron linear accelerator of this invention.

[0070] As a preferred embodiment, based on the above method, the circulating water pipe 3 is further configured as multiple pipes, and adjacent circulating water pipes 3 are arranged in parallel and spaced apart within the concrete wall body 1.

[0071] With this structural design, the circulating water pipe 3 can form multiple heat exchange planes inside the concrete wall body 1, enabling precise temperature control in different areas of the concrete wall body 1, reducing the temperature difference between the inside and outside of the concrete wall body 1, lowering the risk of cracking of the concrete wall body 1, and further improving the radiation protection performance of the medical electron linear accelerator room structure of the present invention.

[0072] As a preferred embodiment, based on the above method, the crest and trough structures of adjacent circulating water pipes 3 are further arranged to alternate by 1 / 4 cycle. With this structural arrangement, the circulating water pipes 3 can mutually fill the vacuum areas generated by their respective heat exchange planes, thereby improving the heat exchange efficiency of the water circulation system 2.

[0073] Example 4

[0074] like Figures 1 to 9 As shown, the radiation shielding wall structure of the present invention, based on the above method, further includes a plurality of finned plates 10 spaced apart on the circulating water pipe 3. The finned plates 10 are configured as long strips of plate-like structure. The finned plates 10 extend toward the heat exchange plane formed by the adjacent circulating water pipes 3, and the heat exchange plane formed by the finned plates 10 is perpendicular to the longitudinal steel bars inside the concrete wall body 1.

[0075] In this embodiment, the finned plate 10 increases the thickness of the heat exchange plane formed by the longitudinally extending circulating water pipe 3, further improving the heat exchange effect and efficiency of the water circulation system 2 of the present invention. On the other hand, the finned plate 10 can also prevent the settling of heavy aggregates during concrete pouring, improving the uniformity of the distribution of heavy aggregates within the concrete wall body 1, thereby ensuring the forming quality of the concrete wall body 1 and further improving the radiation protection performance of the medical linear accelerator room structure of the present invention.

[0076] Example 5

[0077] like Figures 8 to 9 As shown, the radiation shielding wall structure of the present invention, based on the above method, further includes a finned plate 10 comprising a supporting section 11 and a deformable section 12. The supporting section 11 has a hollow internal structure and is connected to the flow channel of the circulating water pipe 3. The deformable section 12 is disposed at the end of the supporting section 11 and is made of a thin sheet metal material.

[0078] Specifically, the supporting section 11 and the deformable section 12 are an integral structure, and the deformable section 12 is made of copper sheet or aluminum sheet. In this embodiment, the interior of the supporting section 11 is set as a hollow structure, which can improve the heat exchange efficiency of the finned plate 10. The deformable section 12 is provided at the end of the supporting section 11. During the concrete pouring construction, the deformable section 12 can bend downward under the pressure of the concrete aggregate. With the cooperation of several finned plates 10 set on multiple circulating water pipes 3, a metal isolation barrier structure can be formed inside the concrete wall body 1, so that the concrete wall body 1 of the present invention can form a better radiation protection performance.

[0079] Furthermore, in another embodiment, the finned plates 10 arranged on adjacent circulating water pipes 3 are staggered, and the distance between the staggered finned plates 10 on adjacent circulating water pipes 3 corresponds to the maximum bending amount of the deformed section 12. This structural arrangement increases the area of ​​the metal isolation barrier structure formed inside the concrete wall body 1, further improving the radiation protection performance of the concrete wall body 1 of the present invention.

[0080] As a preferred embodiment, based on the above method, a plurality of ball bearings 13 are further provided inside the support section 11. The width of the opening where the support section 11 connects to the circulating water pipe 3 is smaller than the diameter of the ball bearings 13. A baffle plate 14 is also provided on the inner wall of the circulating water pipe 3. The baffle plate 14 is used to create turbulence when the heat exchange solution flows through the opening of the support section 11, so that the ball bearings 13 can impact the inner wall of the support section 11 under the action of the turbulence.

[0081] In the above embodiments, the finned plate 10 installed on the circulating water pipe 3 can prevent the settling of heavy aggregate during concrete pouring, improve the uniformity of the distribution of heavy aggregate within the concrete wall body 1, thereby ensuring the molding quality of the concrete wall body 1 and further improving the radiation protection performance of the medical linear accelerator room structure of the present invention. However, the obstruction by the finned plate 10 can also reduce the fluidity of the concrete, causing a cavity to form below the finned plate 10, which has an adverse effect on the radiation protection performance of the concrete wall body 1. Based on this, in this embodiment, a plurality of ball bearings 13 are provided in the support section 11, and a baffle plate 14 is provided on the inner wall of the circulating water pipe 3. The baffle plate 14 is used to create turbulence when the heat exchange solution flows through the opening of the support section 11. Then, the ball bearings 13 can impact the inner wall of the support section 11 under the action of the turbulence, so that the support section 11 and the deformation section 12 vibrate at a certain frequency. Under the action of vibration, the fluidity of the concrete is enhanced, the cavity formed below the finned plate 10 can be filled, and the density of the concrete at the finned plate 10 is improved, thereby further enhancing the radiation protection performance of the concrete wall body 1 of the present invention.

[0082] As a preferred embodiment, based on the above method, the baffle 14 is further connected to the opening where the support section 11 connects to the circulating water pipe 3 via a damping shaft. The baffle 14 has an open state and a closed state. When the impact force generated by the heat exchange solution in the circulating water pipe 3 is greater than the damping force of the damping shaft, the baffle 14 deflects in the direction of heat exchange solution flow to form an open state. In the open state, the baffle 14 forms an acute angle of less than 30° with the opening plane of the support section 11. When the impact force generated by the heat exchange solution in the circulating water pipe 3 is less than the damping force of the damping shaft, the baffle 14 forms a closed state, and the opening where the support section 11 connects to the circulating water pipe 3 is closed by the baffle 14.

[0083] In this embodiment, it is considered that the continuous vibration of the finned plate 10 after the concrete has set may adversely affect the strength of the concrete. Therefore, in this embodiment, the baffle 14 is connected to the opening where the support section 11 connects to the circulating water pipe 3 via a damping shaft. Before the concrete sets, the flow rate of the heat exchange solution in the circulating water pipe 3 is increased so that the impact force generated by the heat exchange solution is greater than the damping force of the damping shaft. The baffle 14 is then in an open state. As a result, the heat exchange solution flows through the opening of the support section 11, creating turbulence. The ball bearings 13, driven by the turbulence, can impact the inner wall of the support section 11, causing the support section 11 and the deformable section 12 to vibrate at a certain frequency. Under the action of vibration, the fluidity of the concrete is enhanced, and the cavity formed below the finned plate 10 can be filled, thus improving the concrete setting of the finned plate 10. The increased density of the soil further enhances the radiation protection performance of the concrete wall body 1 of the present invention. After the concrete has set, the flow rate of the heat exchange solution in the circulating water pipe 3 is slowed down so that the impact force generated by the heat exchange solution is less than the damping force of the damping shaft. The baffle plate 14 is in a closed state, and the opening connecting the support section 11 to the circulating water pipe 3 is sealed by the baffle plate 14. The ball bearing 13 cannot collide with the inside of the support section 11, thus avoiding vibration of the fin plate 10. This prevents the strength of the concrete from being reduced due to vibration after it has set.

[0084] Furthermore, in this embodiment, by regularly changing the flow rate of the heat exchange solution, the baffle 14 can be regularly switched between open and closed states. Thus, when the heat exchange solution flows through the location of the baffle 14, a "water hammer effect" is generated due to the change in the cross-section of the circulating water pipe 3. Under the action of the "water hammer effect," the circulating water pipe 3 as a whole will generate stronger vibrations, thereby better filling the cavities inside the concrete, further improving the density and strength of the concrete, and further enhancing the radiation protection performance of the concrete wall body 1 of the present invention.

[0085] As a preferred embodiment, based on the above method, the inner wall of the support section 11 is further provided as a rough surface. This structural arrangement increases the friction between the ball bearing 13 and the inner wall of the support section 11, and enhances the vibration generated when the ball bearing 13 impacts the inner wall of the support section 11. This further improves the density of the concrete in the finned plate 10 area, thereby further enhancing the radiation protection performance of the concrete wall body 1 of the present invention.

[0086] As a preferred embodiment, based on the above method, the inlet end of the circulating water pipe 3 is further provided with an air pump assembly 15. The air pump assembly 15 includes an air pump body 16, an air supply pipe 17, and an electromagnetic air valve 18. One end of the air supply pipe 17 is connected to the inlet end of the circulating water pipe 3, and the other end is connected to the air pump body 16. The electromagnetic air valve 18 is provided on the air supply pipe 17 and is used to control the opening or closing of the air passage of the air supply pipe 17.

[0087] In this embodiment, the air pump assembly 15 is configured to inject high-pressure gas into the circulating water pipe 3. Driven by the high-pressure gas, the ball bearing 13 can more violently impact the inner wall of the support section 11, further enhancing the vibration of the support section 11 and the deformation section 12. As a result, the density of the concrete in the finned plate 10 can be further improved, further enhancing the radiation protection performance of the concrete wall body 1 of the present invention.

[0088] It should be noted that the air pump assembly 15 described in this embodiment will affect the heat exchange efficiency of the water circulation system 2 during operation. Therefore, the air pump assembly 15 can only be started when the internal temperature of the concrete wall body 1 is effectively controlled. Furthermore, the time for each start-up of the air pump assembly 15 needs to be strictly controlled to avoid excessive temperature difference between the inner and outer surfaces of the concrete wall body 1, which could lead to the formation of temperature cracks and affect the radiation protection performance of the concrete wall body 1 of this invention.

[0089] Example 6

[0090] like Figures 1 to 10 As shown, the construction method of a radiation-shielding wall according to the present invention includes the following steps:

[0091] Step 1: Reinforcement binding of concrete wall body: Bind the reinforcement of concrete wall body according to the construction drawings;

[0092] Step 2, Water Circulation System 2 Installation: After the concrete wall reinforcement is tied, the water circulation system 2 is installed, including the laying of the circulating water pipe 3, the laying of the temperature sensor, the installation of the water storage tank 8 and the wastewater tank 9, and the installation of the water pump.

[0093] Step 3: Template Installation: Install the template and reinforcement system to form the concrete pouring cavity;

[0094] Step 4: Concrete pouring: Pour concrete into the concrete pouring cavity set up in Step 3.

[0095] Step 5: Temperature control of the concrete wall body: The water circulation system 2 is used to control the temperature difference between the inner and outer surfaces of the concrete wall body during the concrete setting process, thereby reducing the temperature stress generated in the concrete wall body.

[0096] Step 6: Seal the circulating water pipe 3: Use M10 expansive cement mortar to grout and fill the circulating water pipe 3.

[0097] Specifically, in step two of this embodiment, the temperature sensor selected is a JDC-2 portable electronic thermometer and its matching embedded temperature sensing element. A multi-channel conversion box is used for the JDC-2 intelligent thermometer, enabling automatic switching between multiple measurement points. The sensor is a semiconductor temperature sensor (thermostat type, accuracy 0.01℃) manufactured by Beijing Haichuang Gaoke. To ensure that the temperature curves measured by the measurement points comprehensively reflect the temperature changes inside the concrete structure, the monitoring points should be arranged within a half-axis of the selected concrete wall's symmetrical axis as the test area. Within this test area, monitoring points should be arranged in planar layers. On each test axis, there should be at least four monitoring points, arranged according to the structure's geometric dimensions. Based on the outer surface temperature and center temperature measurement points, the remaining measurement points should be arranged with a spacing of no more than 600mm, fixed to vertical steel reinforcement bars tied to the concrete wall's reinforcing steel. The plug of the temperature sensing wire should protrude 300-500mm from the concrete surface and be protected with plastic wrap.

[0098] The circulating water pipe 3 is a galvanized pipe with an inner diameter of 50mm, possessing sufficient strength. The pre-embedded position is accurate, the installation is stable, and the joint connections are reliable. When the heat exchange solution pipe encounters the reinforcing steel, its position can be adjusted appropriately. Ensure a secure connection to the reinforcing steel on each layer, unobstructed pipe flow, and firm threaded joints. Conduct a water flow test to prevent leakage or blockage of the cooling pipes during concrete pouring. The circulating water pipe 3 is laid out in a straight "bow" shape in plan, with the outermost heat exchange solution pipe 150cm from the edge of the concrete. The spacing between multiple circulating water pipes 3 should be controlled at 1.0m.

[0099] The circulating water pipe 3 should be laid out according to the design drawings. Before pouring concrete, the circulating water pipe 3 should be pre-filled with heat exchange solution. After the concrete has initially set, the water circulation system 2 should be started promptly. The temperature difference between the inlet water and the highest temperature of the concrete should be controlled by adjusting the inlet water flow rate and water temperature. The temperature difference should be 15 to 25 degrees Celsius, and the temperature difference between the outlet water and the inlet water should be 3 to 6 degrees Celsius. During the concrete temperature control process, the concrete should be kept warm and moist. When the temperature difference between the highest temperature of the concrete and the surface temperature is not greater than 15 degrees Celsius, the temperature control operation can be suspended. When the temperature difference between the highest temperature of the concrete and the surface temperature is greater than 25 degrees Celsius, the water circulation system 2 should be restarted. After the temperature control is completed, the circulating water pipe 3 should be grouted and sealed promptly.

[0100] Before pouring concrete in step four, first wash away any debris, sawdust, etc., from the bottom of the wall, and then moisten the formwork.

[0101] Concrete pouring for the wall should be continuous, with intervals not exceeding 2 hours, and the concrete should be poured at a rate of at least 1.5 meters per hour. Therefore, the locations of the concrete pouring points and the number of vibrator operators must be planned in advance. A flexible hose attached to the concrete pump can be used to transport the concrete, extending it into the wall to ensure the free fall height of the concrete does not exceed 2 meters. During pouring, the hose should be moved back and forth within the wall to ensure even distribution and prevent aggregate segregation.

[0102] Door panels must be installed on the wall formwork under the connecting beams on both sides of the doorway to facilitate concrete pouring and the insertion of vibrators.

[0103] Use φ50 and φ30 vibrators (φ30 vibrators are used in areas with dense reinforcement). Pour and vibrate in layers, with each layer not exceeding 40cm in thickness. Use a ruler and a high-energy flashlight to check the concrete height and vibration at any time. When vibrating the upper layer, insert it 5cm into the lower layer. The walls in this project are relatively thick. To ensure compaction, the vibration points on the walls are arranged in a quincunx pattern, and the moving distance is not greater than 1.5 times the radius of the vibration action.

[0104] The vibrator should be moved at intervals of less than 40cm. The duration of each vibration point should be until the surface is covered with mortar. To ensure that the upper and lower layers of concrete bond together as a whole, the vibrator should be inserted 5-10cm into the lower layer of concrete. Pay attention to areas with dense reinforcement and openings during vibration. To prevent missed vibration, vibration should be performed simultaneously on both sides of the opening, and the bottom mortar height should be roughly the same.

[0105] When pouring concrete for the opening, ensure that the pouring height on both sides of the opening is symmetrical and uniform. Keep the vibrator at least 30cm away from the edge of the opening and vibrate simultaneously from both sides to prevent deformation. Open ventilation holes in the lower formwork of the large opening and add more concrete and vibrate as needed.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A radiation-shielding wall structure, characterized in that, The system includes a concrete wall body and a water circulation system. The water circulation system includes a circulating water pipe and a first water pump. The circulating water pipe is embedded in the concrete wall body and has a serpentine pipe structure. The heat exchange plane formed by the circulating water pipe coincides with or is parallel to the central axis of the concrete wall body. The area of ​​the heat exchange plane formed by the circulating water pipe matches the surface area of ​​the radiation shielding surface formed by the concrete wall body. The circulating water pipe has an inlet end and an outlet end. The first water pump is located at the inlet end of the circulating water pipe and is used to pump the heat exchange solution into the circulating water pipe and circulate the heat exchange solution in the circulating water pipe before discharging it from the outlet end. Along the horizontal direction of the concrete wall body, several water replenishment pipes are also arranged at intervals along the circulating water pipe. Each water replenishment pipe is equipped with a switch valve, and a second water pump is connected to the end of each water replenishment pipe. When the second water pump is started, it opens the switch valve, allowing the heat exchange solution to be pumped from the water replenishment pipe into the circulating water pipe. The circulating water pipes are configured as multiple pipes, and adjacent circulating water pipes are arranged in parallel and spaced apart within the concrete wall body; the crest structure and trough structure of adjacent circulating water pipes are staggered by 1 / 4 cycle. The circulating water pipe is also provided with several finned plates at intervals. The finned plates are configured as long strips of plate-shaped structure. The finned plates extend towards the heat exchange plane formed by the adjacent circulating water pipes, and the heat exchange plane formed by the finned plates is perpendicular to the longitudinal steel bars inside the concrete wall body. The finned plate includes a support section and a deformable section. The support section has a hollow internal structure and is connected to the flow channel of the circulating water pipe. The deformable section is located at the end of the support section and is made of a thin sheet of metal. Several ball bearings are also installed inside the support section. The width of the opening connecting the support section to the circulating water pipe is smaller than the diameter of the ball bearings. A baffle plate is installed on the inner wall of the circulating water pipe. The baffle plate creates turbulence when the heat exchange solution flows through the opening of the support section, allowing the ball bearings to impact the inner wall of the support section under the influence of the turbulence. The inner wall of the support section is... The surface is rough. The baffle is connected to the opening between the support section and the circulating water pipe via a damping shaft. The baffle has an open state and a closed state. When the impact force generated by the heat exchange solution in the circulating water pipe is greater than the damping force of the damping shaft, the baffle deflects in the direction of heat exchange solution flow to form an open state. In the open state, the baffle forms an acute angle of less than 30° with the opening plane of the support section. When the impact force generated by the heat exchange solution in the circulating water pipe is less than the damping force of the damping shaft, the baffle forms a closed state, and the opening between the support section and the circulating water pipe is closed by the baffle.

2. The radiation-proof wall structure according to claim 1, characterized in that, The water circulation system also includes a water storage tank and a wastewater tank. The first water pump and the second water pump are connected to the water storage tank, and the outlet of the circulating water pipe is connected to the wastewater tank.

3. The radiation-proof wall structure according to claim 2, characterized in that, A temperature sensor is also provided at the connection end between the water supply pipe and the circulating water pipe. The temperature sensor is used to detect the temperature of the heat exchange solution in the circulating water pipe.

4. The radiation-proof wall structure according to claim 3, characterized in that, The water supply pipe is located at the top of the circulating water pipe; the water supply pipe is made of transparent material.

5. The radiation-proof wall structure according to claim 4, characterized in that, The top of the circulating water pipe protrudes above the top surface of the concrete wall, and the height at which the circulating water pipe protrudes above the top surface of the concrete wall matches the thickness of the roof slab of the electron linear accelerator room.

6. The radiation-proof wall structure according to claim 5, characterized in that, The inlet end of the circulating water pipe is also equipped with an air pump assembly, which includes an air pump body, an air delivery pipe, and a solenoid valve. One end of the air delivery pipe is connected to the inlet end of the circulating water pipe, and the other end is connected to the air pump body. The solenoid valve is installed on the air delivery pipe and is used to control the opening or closing of the air passage of the air delivery pipe.

7. A construction method for a radiation-shielding wall structure according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Binding of steel reinforcement in concrete wall: Bind the steel reinforcement in the concrete wall according to the construction drawings. Step 2, Water Circulation System Installation: After the reinforcement of the concrete wall is tied, the water circulation system will be installed. Step 3: Template Installation: Install the template and reinforcement system to form the concrete pouring cavity; Step 4: Concrete pouring: Pour concrete into the concrete pouring cavity set up in Step 3. Step 5: Temperature control of the concrete wall body: Use a water circulation system to control the temperature difference between the inside and outside of the concrete wall body during the concrete setting process, thereby reducing the temperature stress generated in the concrete wall body. Step 6: Seal the circulating water pipe: Use expansive cement mortar to grout and fill the circulating water pipe.

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