Modular assembly connection structure for zero magnetic concrete shielding structure

Abstract

A modular assembly connecting structure for zero magnetic concrete shielding structure, including first shielding module and second shielding module, shielding module is made of zero magnetic concrete, the butt joint end face of first shielding module is equipped with male tenon, the butt joint end face of second shielding module is equipped with female slot matched with male tenon, male tenon and female slot jointly constitute labyrinth rabbet, because the labyrinth rabbet of male tenon and female slot is set, the path of magnetic flux through concrete joint is greatly prolonged, effectively increase the magnetic resistance, realize the physical isolation, in the inside, through the butt joint of pre-buried magnetic flux conducting pipe to form continuous channel and pour high magnetic permeability pouring material, provide the low magnetic resistance path of magnetic induction line across joint, guide and restrain magnetic field, ensure the continuity of magnetic circuit, at the same time, cooperate with the high magnetic permeability sealing strip in sealing groove, realize the magnetic conduction at joint, this joint structure combined by " conduction " and " isolation " ensure that the overall structure after assembly seamlessly connects on magnetic shielding performance.

Description

Technical Field

[0001] This utility model relates to the field of building structure and electromagnetic shielding technology, specifically to a modular assembly connection structure for zero-magnetic concrete shielding structures. Background Technology

[0002] With the development of cutting-edge technologies such as brain science, quantum metrology, and high-precision inertial navigation, there is an urgent need for zero-magnetic spaces that can shield against the Earth's magnetic field and environmental magnetic interference. Existing magnetic shielding rooms mostly adopt integral welded metal plate structures, which have problems such as high cost, long construction period, bulky structure, and difficulty in expansion and modification. Concrete structures have advantages such as low cost, high structural rigidity, and high design freedom. However, ordinary concrete contains ferromagnetic impurities, which can generate magnetic field interference. Therefore, developing zero-magnetic concrete structures has become a feasible technical path. However, when assembling concrete structures in modules, the joints between modules will cut off the continuous magnetic flux path, forming weak links in magnetic shielding and causing a sharp drop in overall shielding effectiveness. Existing modular connection schemes for ordinary buildings only solve mechanical connection problems. The steel connectors and ordinary concrete materials used in these schemes themselves introduce magnetic interference, which cannot meet the stringent requirements of a zero-magnetic environment.

[0003] Therefore, there is an urgent need in this field for an innovative connection structure that can work in conjunction with zero-magnetic concrete to ensure the continuity of magnetic shielding at the joints. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a modular assembly and connection structure that is structurally reasonable, has continuous magnetic shielding, is easy to construct, and is coordinated with zero magnetic characteristics.

[0005] The technical solution adopted to solve the above technical problems is: A modular assembly connection structure for zero-magnetic concrete shielding structures includes a first shielding module and a second shielding module. The shielding modules are made of zero-magnetic concrete. The mating end face of the first shielding module is provided with a male tenon, and the mating end face of the second shielding module is provided with a female groove that matches the male tenon. The male tenon and the female groove together form a labyrinth-type tongue and groove. The side walls of the male tenon and / or the female groove are provided with sealing grooves, and high magnetic permeability sealing strips are provided in the sealing grooves. A first magnetic flux conduction tube is pre-embedded inside the male tenon along the assembly direction, and a second magnetic flux conduction tube is pre-embedded at a corresponding position inside the female groove. When the male tenon and the female groove are assembled in place, the first magnetic flux conduction tube and the second magnetic flux conduction tube are connected to form a continuous magnetic flux conduction channel. The top of the first shielding module and / or the second shielding module is provided with a grouting hole that communicates with the magnetic flux conduction channel.

[0006] As a preferred embodiment of this utility model, the end of the male tenon is provided with a guide cone, and the bottom of the female groove is provided with a positioning recess that cooperates with the guide cone.

[0007] As a preferred technical solution of this utility model, both the first shielding module and the second shielding module have pre-embedded connector supports inside. The side wall of the module is provided with an operation hole corresponding to the position of the connector support. The first shielding module and the second shielding module are rigidly connected to the connector support through fasteners passing through the operation hole.

[0008] As a preferred embodiment of this utility model, the fastener is a non-magnetic high-strength bolt or a non-magnetic prestressed tie rod.

[0009] As a preferred embodiment of this invention, the zero-magnetic concrete is concrete prepared from non-magnetic cementitious materials and non-magnetic aggregates, with a magnetic susceptibility lower than -10×10⁻⁻⁻⁶. 6 SI.

[0010] As a preferred embodiment of this utility model, the high magnetic permeability sealing strip is a rubber strip filled with soft magnetic material powder, wherein the soft magnetic material powder is permalloy powder or carbonyl iron powder.

[0011] As a preferred embodiment of this invention, the magnetic flux conduction channel is filled with a high-permeability potting material.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model specifically designs a "dual guarantee" mechanism of "magnetic circuit conduction and physical isolation": Externally, the labyrinthine tongue and groove formed by the male tenon and female groove greatly extends the path of magnetic flux through the concrete joint, effectively increasing magnetic resistance and achieving physical isolation. Internally, the pre-embedded magnetic flux conduction tubes are connected to form a continuous channel and filled with high magnetic permeability potting material, providing a low magnetic resistance path for magnetic field lines across the joint, guiding and constraining the magnetic field, and ensuring the continuity of the magnetic circuit. At the same time, in conjunction with the high magnetic permeability sealing strip in the sealing groove, magnetic conduction at the joint is achieved. This joint structure, which combines "conduction" and "isolation", ensures that the overall structure after assembly has a seamless connection in terms of magnetic shielding performance, overcoming the technical bottleneck of modular magnetic shielding structure.

[0013] 2. This utility model uses all non-magnetic or high-permeability materials (such as non-magnetic concrete, non-magnetic fasteners, high-permeability sealing strips, and potting materials), eliminating magnetic interference introduced by the connection structure itself at the source. Simultaneously, this modular system supports dry rapid assembly and potential disassembly and reuse, providing great flexibility for the construction and renovation of large-scale zero-magnetic laboratories, demonstrating significant comprehensive advantages. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model before assembly.

[0015] Figure 2 This is a partial cross-sectional view of the mating end face of the two shielding modules before assembly.

[0016] Figure 3 for Figure 2 A magnified schematic diagram of a portion of the structure.

[0017] Figure 4 This is a schematic diagram showing the positional structure of the male tenon and guide cone of this utility model.

[0018] In the diagram: 1. First shielding module; 2. Second shielding module; 3. Male tenon; 4. Female groove; 5. Sealing groove; 6. High magnetic permeability sealing strip; 7. First magnetic flux conduction tube; 8. Second magnetic flux conduction tube; 9. Magnetic flux conduction channel; 10. Injection hole; 11. Guide cone; 12. Positioning recess; 13. Connector support; 14. Operating hole; 15. Non-magnetic high-strength bolt. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected 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.

[0021] 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.

[0022] In the above description of this utility model, it should be noted that the terms "one side," "the other side," 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 utility model product is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0024] Example 1 exist Figures 1-4 This utility model provides a technical solution: a modular assembly connection structure for zero-carbon concrete shielding structures. This structure mainly includes prefabricated modules. First, the required first shielding module 1 and second shielding module 2 are prefabricated in a factory. Then, materials are prepared using non-magnetic concrete made with C30 strength white cement and limestone aggregate as the matrix, together forming zero-magnetic concrete. Its magnetic susceptibility, as tested, is below -10×10⁻⁻⁻⁻⁶. 6 SI.

[0025] Next, the structure is formed. When pouring concrete into the mold, the components are pre-embedded according to the design: a male tenon 3 with a trapezoidal cross section is formed at the end of the first shielding module 1. A first magnetic flux conduction tube 7 with an inner diameter of 50mm made of austenitic stainless steel is pre-embedded at the central axis position inside the male tenon 3. A sealing groove 5 with a depth of 10mm is opened on each of the two oblique sides of the male tenon 3. Then, a female groove 4 that perfectly matches the shape of the male tenon 3 is formed at the end of the second shielding module 2. A second magnetic flux conduction tube 8 of the same specification is pre-embedded at the corresponding position inside the female groove 4. A hemispherical positioning recess 12 is machined at the bottom center of the female groove 4. At the same time, two non-magnetic stainless steel plates with a thickness of 20mm are pre-embedded as connecting support 13 at a distance of 200mm from the side wall inside the two modules. An operating hole 14 with a diameter of 30mm is reserved at the center position of the support 13 on the side wall of the module.

[0026] Meanwhile, at the top of the module, directly opposite the pre-embedded magnetic flux conduction tube (7, 8), a grouting hole 10 with a diameter of 80mm is reserved. This hole penetrates the top surface of the module and is connected to the magnetic flux conduction tube. The number of grouting holes 10 is set according to the requirements.

[0027] Finally, the curing and post-treatment are carried out. After the casting is completed, standard curing is carried out. After the design strength is reached, the mold is removed. A high magnetic permeability sealing strip 6 with a circular cross section and a diameter of 12mm (in this example, a silicone rubber strip filled with permalloy powder) is pressed into the sealing groove 5 of the tenon 3. A plastic guide cone 11 is installed at the end of the tenon 3.

[0028] During on-site assembly and construction: Step 1: Hoisting and positioning. First, hoist the first shielding module 1 to the designed position and fix it. Then, hoist the second shielding module 2 so that its female groove 4 is roughly aligned with the male tenon 3 of the first shielding module 1.

[0029] Step 2: Using the guiding effect of the guide cone 11 at the end of the male tenon 3 and the positioning recess 12 at the bottom of the female groove 4, the second shielding module 2 is moved slowly so that the male tenon 3 is smoothly embedded into the female groove 4. During this process, the high magnetic permeability sealing strip 6 is uniformly compressed and fills the gap between the male tenon 3 and the female groove 4.

[0030] Step 3: After the module is assembled in place, the construction personnel insert a tool through the operating hole 14 and use a non-magnetic 8.8 grade high-strength bolt 15 (M20, austenitic stainless steel) to pass through the operating hole and screw it into the threaded hole of the pre-embedded connector support 13 of the opposite module, and apply the specified torque (300 N·m in this example) to rigidly connect the two modules into one.

[0031] Step 4: Through the injection hole 10 at the top, a high-permeability potting material is injected into the magnetic flux conduction channel 9, formed by the docking of the first magnetic flux conduction tube 7 and the second magnetic flux conduction tube 8, using a pressure grouting machine. This potting material is a mixture of epoxy resin and carbonyl iron powder in a mass ratio of 3:7. The injection must be continuous until the material overflows from the injection hole 10, indicating that the channel has been completely filled.

[0032] Step 5: Curing the injected sealing material. After it has hardened, fill and smooth the injection hole 10 with the same proportion of zero-magnetic dry-mixed concrete.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A modular assembly connection structure for zero-magnetic concrete shielding structures, comprising a first shielding module (1) and a second shielding module (2), wherein the shielding modules are made of zero-magnetic concrete, characterized in that: The first shielding module (1) has a male tenon (3) on its mating end face, and the second shielding module (2) has a female groove (4) that matches the male tenon (3) on its mating end face. The male tenon (3) and the female groove (4) together form a labyrinth tongue and groove. The side wall of the male tenon (3) and / or the female groove (4) is provided with a sealing groove (5). A high magnetic permeability sealing strip (6) is provided in the sealing groove (5). A first magnetic flux conduction tube (7) is pre-embedded in the male tenon (3) along the assembly direction. A second magnetic flux conduction tube (8) is pre-embedded in the corresponding position in the female groove (4). When the male tenon (3) and the female groove (4) are assembled in place, the first magnetic flux conduction tube (7) and the second magnetic flux conduction tube (8) are connected to form a continuous magnetic flux conduction channel (9). The top of the first shielding module (1) and / or the second shielding module (2) is provided with an injection hole (10) that communicates with the magnetic flux conduction channel (9).

2. The modular assembly connection structure for zero-magnetic concrete shielding structures according to claim 1, characterized in that: The male tenon (3) is provided with a guide cone (11) at its end, and the female groove (4) is provided with a positioning recess (12) that cooperates with the guide cone (11) at its bottom.

3. The modular assembly connection structure for zero-magnetic concrete shielding structures according to claim 1, characterized in that: Both the first shielding module (1) and the second shielding module (2) have pre-embedded connector supports (13). The side wall of the module has an operation hole (14) corresponding to the position of the connector support (13). The first shielding module (1) and the second shielding module (2) are rigidly connected to the connector support (13) by fasteners passing through the operation hole (14).

4. A modular assembly connection structure for zero-magnetic concrete shielding structures according to claim 3, characterized in that: The fastener is a non-magnetic high-strength bolt (15) or a non-magnetic prestressed tie rod.

5. A modular assembly connection structure for zero-magnetic concrete shielding structures according to claim 1, characterized in that: The zero-magnetic concrete is concrete made from non-magnetic cementitious materials and non-magnetic aggregates, with a magnetic susceptibility of less than -10×10⁻. 6 SI.

6. A modular assembly connection structure for zero-magnetic concrete shielding structures according to claim 1, characterized in that: The high magnetic permeability sealing strip (6) is a rubber strip filled with soft magnetic material powder, which is permalloy powder or carbonyl iron powder.

7. A modular assembly connection structure for zero-magnetic concrete shielding structures according to claim 1, characterized in that: The magnetic flux conduction channel (9) is filled with a high permeability potting material.

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