A puzzle structure

Abstract

The present application belongs to the technical field of puzzle, and particularly relates to a puzzle structure. The puzzle structure comprises a puzzle main body A and a puzzle main body B for assembly. The puzzle main body A is provided with a plug-in cavity, and the puzzle main body B is provided with a tenon which is plugged into the plug-in cavity. The inner wall surface of the plug-in cavity is a first sealing surface, and the outer wall surface of the tenon is a second sealing surface. A sealing ring is arranged between the first sealing surface and the second sealing surface. A vertical groove is arranged on one side of the sealing ring, and the groove is filled with water-swelling material. The sealing effect of the sealing ring is supplemented, and the sealing and waterproof performance of the puzzle structure at the plug-in matching surface is maintained.

Description

Technical Field

[0001] This invention belongs to the field of square piecing technology, and specifically relates to a square piecing structure. Background Technology

[0002] As a renewable natural resource, bamboo has been increasingly widely used in building components, furniture manufacturing, and outdoor landscaping in recent years. Engineered bamboo materials, such as bamboo bundle laminates and reconstituted bamboo, are produced by processing bamboo through splitting, drying, gluing, and hot pressing to form square timber with regular cross-sections and stable mechanical properties. These are commonly referred to as bamboo squares and can be used as raw materials for structural components such as beams and columns.

[0003] In practical applications of bamboo squares, due to the limited diameter of the bamboo material itself, a single bamboo square often cannot meet the requirements of large-span, large-section structural components. Therefore, it is usually necessary to combine multiple bamboo squares into larger-sized components by splicing, or to connect the ends of the bamboo squares to other components. One common splicing method is to set a mortise cavity on one of the main body of the bamboo square and a tenon that mates with the mortise cavity on the other main body of the bamboo square. The connection between the two main bodies of the bamboo square is achieved through the mortise and tenon joint. If necessary, fasteners can be used to further tighten the connection. This connection method has the advantages of simple construction, convenient processing, and easy on-site assembly, and has been applied in bamboo structures, wood structures, and other fields.

[0004] However, the aforementioned interlocking bamboo frame structure has shortcomings in sealing and waterproofing during practical use. On the one hand, during assembly, machining tolerances and assembly gaps inevitably exist between the mating surfaces of the interlocking cavity and the tenon. Without corresponding sealing measures, external moisture and rainwater can easily seep into the interior of the frame structure through these gaps. On the other hand, bamboo frame, as a composite material made of multiple layers of bamboo bundles or bamboo strips glued together, has a large number of bonding interfaces. The impermeability of these bonding interfaces is usually lower than that of the bamboo fibers themselves. Once moisture seeps into the interior of the frame structure along the interlocking mating surfaces, it can easily continue to penetrate and diffuse along the bonding interfaces, causing local bamboo bundles to become damp and swell, and the bonding layers to detach. Long-term repeated exposure to moisture may also cause the bamboo to rot or become moldy, thereby reducing the connection reliability and service life of the frame structure. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a square structure.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A square-shaped structure is provided, including:

[0008] Assembly blocks A and B are used for assembly.

[0009] The assembly body A has a insertion cavity, and the assembly body B has a tenon, which is inserted into the insertion cavity;

[0010] The inner wall surface of the insertion cavity is the first sealing surface, and the outer wall surface of the tenon is the second sealing surface;

[0011] A sealing ring is provided between the first sealing surface and the second sealing surface;

[0012] Additionally, a vertical groove is provided on one side of the sealing ring, and the groove is filled with a water-swellable material.

[0013] Preferably, it includes:

[0014] The anti-crack groove is formed in the cavity wall of the insertion cavity and is provided along its depth direction.

[0015] Preferably, it includes:

[0016] A sealing element is disposed at the opening of the crack-prevention groove and seals the crack-prevention groove;

[0017] The sealing component is made of rubber.

[0018] Preferably, a groove is provided on the main body B of the assembly, corresponding to the position of the sealing component;

[0019] One part of the sealing component is disposed at the opening of the crack-prevention groove, and the other part is disposed inside the settling groove.

[0020] Preferably, the crack-resistant groove is filled with an elastic strip, wherein the compression modulus of the elastic strip is less than the compression modulus of the sealing ring, and less than the compression modulus of the water-swellable material after expansion.

[0021] Preferably, the sealing ring has:

[0022] First sealing substrate and second sealing substrate;

[0023] Wherein, the first sealing substrate is in contact with the first sealing surface, and the second sealing substrate is connected to the second sealing surface;

[0024] Furthermore, the thickness of the second sealing substrate is less than the thickness of the first sealing substrate.

[0025] Preferably, a guide groove is provided on the first sealing surface at a position corresponding to the first sealing substrate:

[0026] The guide groove has a wedge-shaped guide surface, and the depth of the guide groove is less than the thickness difference of the second sealing substrate before and after compression.

[0027] Preferably, it also includes an inner filling plate, which is arranged vertically and positioned between the main body A and the main body B of the assembly.

[0028] Preferably, it further includes a first fastener and a second fastener;

[0029] The first fastener is disposed horizontally, penetrating the upper part of the main body A and the inner filling plate;

[0030] The second fastener is horizontally positioned, penetrating the lower part of the main body B and the inner filling plate.

[0031] Preferably, the bottom of the cavity is provided with an overflow groove, and the overflow groove is positioned corresponding to the groove body.

[0032] This invention provides a square structure, and the beneficial effects of this invention are as follows:

[0033] When external moisture seeps into the area where the groove is located through the sealing ring, the water-swellable material absorbs water and expands in volume. The expanded water-swellable material can fill the gap between the interlocking cavity and the tenon caused by processing tolerances, assembly gaps, or the expansion and contraction of bamboo due to moisture and creep during long-term use. This supplements the sealing effect of the sealing ring and maintains the sealing and waterproof performance of the interlocking structure at the interlocking surface. Attached Figure Description

[0034] Figure 1 This is one of the three-dimensional images of the square structure proposed in this invention;

[0035] Figure 2 This is the second perspective view of the square structure proposed in this invention;

[0036] Figure 3 This is one of the half-sectional views of the square structure proposed in this invention;

[0037] Figure 4 This is a second half-sectional view of the square structure proposed in this invention;

[0038] Figure 5 This is one of the partial cross-sectional views of the square structure proposed in this invention;

[0039] Figure 6 This is a second partial cross-sectional view of the square structure proposed in this invention;

[0040] Figure 7 This is the third partial cross-sectional view of the square structure proposed in this invention;

[0041] Figure 8 This is a schematic diagram of the sealing ring with a square structure proposed in this invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Assembly body A; 101. Insertion cavity; 2. Assembly body B; 201. Tenon; 301. First sealing surface; 302. Second sealing surface; 4. Sealing ring; 401. First sealing base; 402. Second sealing base; 5. Groove; 6. Crack prevention groove; 7. Sealing component; 8. Settling groove; 9. Elastic strip; 10. Guide groove; 11. Inner filling plate; 12. First fastener; 13. Second fastener; 14. Overflow groove. Detailed Implementation

[0044] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1-8 As shown, the specific embodiments provided by the present invention are as follows:

[0046] like Figures 1 to 4 As shown, an embodiment of the present invention proposes a modular structure, including modular body A1 and modular body B2 for assembly.

[0047] The end of the main assembly A1 has a insertion cavity 101, and the end of the main assembly B2 has a tenon 201. During assembly, the tenon 201 is inserted into the insertion cavity 101 along the insertion direction to achieve the insertion fit between the main assembly A1 and the main assembly B2. The main assembly A1 and the main assembly B2 can be used as the ends of structural components such as beams and columns, or they can be used for splicing the middle section of the same component along its length. This embodiment does not limit the specific application location of the main assembly A1 and the main assembly B2.

[0048] The insertion cavity 101 has an inner wall surface, which forms a first sealing surface 301; the tenon 201 has an outer wall surface, which forms a second sealing surface 302.

[0049] When the tenon 201 is inserted into the insertion cavity 101, the first sealing surface 301 and the second sealing surface 302 are oriented towards each other. The cross-sectional shape of the insertion cavity 101 and the tenon 201 can be circular, square, or other polygonal, as long as the shape of the inner wall of the insertion cavity 101 matches the shape of the outer wall of the tenon 201 to achieve insertion and mating. This embodiment does not limit this.

[0050] A sealing ring 4 is provided between the first sealing surface 301 and the second sealing surface 302. The sealing ring 4 can be arranged in a ring shape and is sleeved on the outer periphery of the tenon 201. When the tenon 201 is inserted into the insertion cavity 101, the sealing ring 4 contacts the first sealing surface 301, thereby forming a seal between the insertion cavity 101 and the insertion mating surface of the tenon 201.

[0051] The sealing ring 4 can be made of materials with good weather resistance and aging resistance, such as EPDM rubber, neoprene rubber or silicone rubber, to meet the long-term sealing requirements of the square structure under different usage environments.

[0052] like Figure 5 As shown, a groove 5 is also provided on one side of the sealing ring 4, and the groove 5 is arranged vertically. The groove 5 is filled with a water-swellable material. The water-swellable material has a certain elasticity and compressibility under normal dry conditions and will not hinder the insertion and assembly of the main body A1 and the main body B2. When external moisture seeps into the area where the groove 5 is located through the sealing ring 4, the water-swellable material absorbs water and expands in volume. The expanded water-swellable material can fill the gap between the insertion cavity 101 and the tenon 201 caused by processing tolerances, assembly gaps, or the expansion and contraction of bamboo due to moisture and creep during long-term use, thereby supplementing the sealing effect of the sealing ring 4 and maintaining the sealing and waterproof performance of the joint structure at the insertion mating surface.

[0053] Optionally, the vertical setting range of the groove 5 can correspond to the vertical setting range of the sealing ring 4, so that the water-swellable material can supplement the sealing effect of the area where the sealing ring 4 is located after expansion.

[0054] It should be noted that the sealing ring 4 and the water-swellable material in this embodiment perform sealing functions at different stages and are not simply redundant: the sealing ring 4 is mainly responsible for the initial sealing after the assembly of the modular body A1 and the modular body B2 is completed. Through its own elastic compression deformation, it forms an initial sealing pressure between the first sealing surface 301 and the second sealing surface 302; while when the sealing ring 4 experiences a decrease in sealing pressure or even partial loss of sealing effect due to material aging, bamboo shrinkage deformation, or processing and assembly errors caused by long-term use, the water-swellable material expands by absorbing water to provide secondary compensation for the resulting sealing gap. Thus, in addition to the initial sealing performance of the sealing ring 4, the modular structure also has the ability to compensate for the risk of sealing failure during long-term service.

[0055] Unlike water-swellable sealing materials commonly used for construction joints and expansion joints, the water-swellable material in this embodiment is set in the rigid interlocking area between the main body A1 and the main body B2 of the interlocking structure. It is mainly used to compensate for the changes in the mating gap caused by the expansion and contraction of the engineering bamboo material during long-term service, and to ensure that the interlocking mating surface can maintain a sealed state.

[0056] It should be noted that both the main body A1 and the main body B2 of the modular structure can be made of bamboo bundle laminated material, or other types of engineered bamboo materials can be selected according to actual needs. This embodiment does not limit this. Furthermore, the main body A1 and the main body B2 can also be made of different engineered bamboo materials or different density grades. For example, for applications with relatively large loads or high requirements for moisture resistance, higher density engineered bamboo materials can be selected. This embodiment does not limit the material selection for the main body A1 and the main body B2.

[0057] In a preferred embodiment, the piecing structure further includes a crack-prevention groove 6, which is formed in the cavity wall of the insertion cavity 101 and is arranged along its depth direction.

[0058] The portion of the cavity wall of the insertion cavity 101 located between the anti-crack groove 6 and the first sealing surface 301 constitutes a deformable wall. The thickness of the deformable wall can gradually change along the depth direction of the anti-crack groove 6. For example, the thickness is relatively small at the end closer to the first sealing surface 301 and relatively large at the end closer to the main body of the cavity wall, so that the deformable wall can ensure a certain deformation capacity while taking into account the overall structural strength of the cavity wall.

[0059] When the water-swellable material absorbs water and expands, it will exert a certain compressive force on the cavity wall. Under this force, the deformable wall can produce a certain degree of elastic deformation, thereby buffering the force generated during the expansion of the water-swellable material and preventing the cavity wall from cracking due to local stress concentration.

[0060] It should be noted that the anti-crack groove 6 can be continuously arranged along the circumferential direction of the cavity wall of the insertion cavity 101, or it can be locally arranged only on a portion of the cavity wall parallel to the bamboo bundle extension direction, depending on the bamboo bundle extension direction of the main body A1. This embodiment does not limit this. At the corner of the insertion cavity 101, the anti-crack groove 6 can be set in the form of a rounded transition to avoid the anti-crack groove 6 itself generating new stress concentration at the corner position.

[0061] like Figure 7As shown, in a preferred embodiment, the piecing structure further includes a sealing member 7, which is disposed at the opening of the anti-crack groove 6 and seals the anti-crack groove 6.

[0062] The sealing element 7 is made of rubber and has a certain degree of elasticity. When the anti-crack groove 6 changes shape due to the elastic deformation of the deformable wall, the sealing element 7 can undergo corresponding elastic deformation with the shape change at the opening of the anti-crack groove 6, and still maintain the closed state of the opening of the anti-crack groove 6.

[0063] By providing the sealing element 7, external moisture can be prevented from directly entering the crack-resistant groove 6 through its opening, thus preventing water accumulation inside the crack-resistant groove 6 from causing freezing expansion in low-temperature environments or affecting the mechanical properties of the deformable wall due to prolonged dampness. An adhesive layer can also be provided between the sealing element 7 and the opening of the crack-resistant groove 6 to further improve the sealing reliability between them. This adhesive layer can be made of a sealant with a certain degree of elasticity to accommodate the deformation of the sealing element 7 during use.

[0064] In a preferred embodiment, the sealing member 7 is groove-shaped, sleeved on the end of the insertion cavity 101, and covers the opening of the anti-crack groove 6, thereby sealing the anti-crack groove 6.

[0065] In a preferred embodiment, one end of the sealing member 7 is fixedly connected to the outer circumference and inner wall surface of the insertion cavity 101, and the other end of the sealing member 7 extends toward the opening of the anti-crack groove 6.

[0066] Along the extension direction, the length of the sealing member 7 is greater than the distance between one end of the fixed connection and the opening of the crack-prevention groove 6, so that the sealing member 7 has a certain margin of length.

[0067] When the sealing member 7 is pressed into the settling tank 8, since one end of the sealing member 7 is fixedly connected and cannot continue to move, the part corresponding to the excess length cannot extend due to axial pressure, thus producing irregular wrinkling deformation.

[0068] Because the sealing component 7 is in a wrinkled state, its surface forms multiple independent local contact areas. Compared with a flat surface without wrinkles, it can better adapt to the uneven surface of the end of the insertion cavity 101 caused by processing, forming multiple interlocking sealing contact lines, thus improving the reliability and redundancy of the seal.

[0069] Optionally, the sealing member 7 may have several guide creases pre-set along its extension direction within the area corresponding to the excess length, so that when the sealing member 7 is subjected to axial pressure, it can preferentially produce regular wrinkle deformation along the guide creases, thereby making the wrinkle shape formed after each installation relatively controllable and repeatable, avoiding unstable sealing effect due to completely disordered wrinkle deformation.

[0070] In a preferred embodiment, a sinkhole 8 is provided on the main body B2 of the assembly, corresponding to the position of the sealing member 7.

[0071] A portion of the sealing component 7 is disposed at the opening of the crack-prevention groove 6, and another portion is disposed within the settling groove 8, so that the sealing component 7 spans between the assembled square body A1 and the assembled square body B2.

[0072] The grooves of the sink 8 and the crack-prevention groove 6 together provide installation space for the sealing component 7, so that the two sides of the sealing component 7 are supported and positioned on the main body A1 and the main body B2 respectively. Compared with the method of fixing only one side, it can reduce the possibility of the sealing component 7 loosening or falling off during long-term use.

[0073] In a preferred embodiment, the crack-resistant groove 6 is filled with an elastic strip 9.

[0074] The compression modulus of the elastic strip 9 is less than that of the sealing ring 4, and also less than that of the water-swellable material after expansion. The elastic strip 9 can be made of closed-cell foam material, which has a large number of tiny pores inside. When compressed, the volume of the pores can be compressed and reduced, resulting in better compressibility compared to solid elastic materials.

[0075] When the water-swellable material expands and exerts a compressive force on the deformable wall, the elastic strip 9 has the smallest compression modulus. Therefore, the elastic strip 9 is more easily compressed than the sealing ring 4 and the expanded water-swellable material, and can deform preferentially compared to other components. This provides a certain graded buffering effect on the force transmitted to the deformable wall.

[0076] It should be noted that when the elastic strip 9 is disposed within the crack-resistant groove 6, a certain gap can be maintained between it and the bottom of the crack-resistant groove 6 to form a cavity. This ensures that the deformable wall has sufficient deformation space during the deformation process under stress, and avoids limiting the deformation of the deformable wall due to the elastic strip 9 completely filling the crack-resistant groove 6. Optionally, the cavity can be disposed through the crack-resistant groove 6, so that a certain ventilation path is formed between the cavity and the external environment, preventing the accumulation of moisture in the cavity due to sealing.

[0077] like Figure 8 As shown, in a preferred embodiment, the sealing ring 4 has a first sealing base 401 and a second sealing base 402, and the first sealing base 401 and the second sealing base 402 are connected.

[0078] The first sealing substrate 401 is in contact with the first sealing surface 301, and the second sealing substrate 402 is in contact with the second sealing surface 302.

[0079] Along the direction from the inner wall of the insertion cavity 101 to the outer wall of the tenon 201, the thickness of the second sealing base 402 is less than the thickness of the first sealing base 401. Optionally, the Shore hardness of the first sealing base 401 can be greater than the Shore hardness of the second sealing base 402, so that when the first sealing base 401 contacts the first sealing surface 301, it can better adapt to the surface unevenness of the first sealing surface 301 caused by processing, forming a more uniform contact sealing pressure.

[0080] During the insertion and assembly of the assembly body A1 and the assembly body B2, the second sealing base 402, being relatively thinner, is more easily compressed than the first sealing base 401. This allows it to deform preferentially during insertion, providing clearance for the tenon 201 to smoothly insert into the insertion cavity 101 and reducing resistance during assembly. After insertion, the first sealing base 401 primarily maintains the sealing effect between the first sealing surface 301 and the second sealing surface 302. The surface of the first sealing base 401 facing the first sealing surface 301 may also be provided with multiple vertically extending ribs, forming multiple relatively independent sealing lines between the first sealing base 401 and the first sealing surface 301, thus improving the reliability and redundancy of the seal.

[0081] like Figure 6 As shown, in a preferred embodiment, a guide groove 10 is provided on the first sealing surface 301 at a position corresponding to the first sealing substrate 401, and the guide groove 10 has a wedge-shaped guide surface.

[0082] During the insertion and assembly of the assembly body A1 and the assembly body B2, the first sealing surface 301 gradually slides across the surface of the first sealing base 401 along the insertion direction, continuously compressing the first sealing base 401; when inserted to a set position, the guide groove 10 on the first sealing surface 301 corresponds to the first sealing base 401, and the first sealing base 401 obtains a partial rebound space at this position, generating a certain degree of rebound along the wedge-shaped guide surface into the guide groove 10.

[0083] The depth of the guide groove 10 is less than the thickness difference of the first sealing substrate 401 before and after compression, so that the first sealing substrate 401 remains in a compressed state after rebounding, thereby maintaining the necessary contact sealing pressure between it and the first sealing surface 301. Optionally, the guide groove 10 is positioned along the insertion direction close to the endpoint when the splicing body A1 and the splicing body B2 are inserted into place, so that the first sealing substrate 401 remains under continuous pressure for most of the insertion process, and only gains partial rebound space when the insertion is near completion.

[0084] In a preferred embodiment, the piecing structure further includes an inner filling plate 11, which is arranged vertically and positioned between the piecing body A1 and the piecing body B2.

[0085] The upper part of the inner filling plate 11 is located inside the insertion cavity 101 of the main body A1, and the lower part of the inner filling plate 11 is located inside the tenon 201 of the main body B2, so that the inner filling plate 11 spans between the main body A1 and the main body B2.

[0086] It should be noted that the inner filling plate 11 can be made of steel plate or other plate-shaped materials with sufficient strength and rigidity. The inner filling plate 11 provides internal structural reinforcement to the insertion joint between the insertion cavity 101 and the tenon 201. Optionally, the surface of the inner filling plate 11 facing the insertion cavity 101 can also be provided with an anti-corrosion coating to reduce the risk of rust formation in long-term humid environments and prevent the expansion of rust products from exerting additional pressure on the surrounding bamboo.

[0087] In a preferred embodiment, the piecing structure further includes a first fastener 12 and a second fastener 13.

[0088] The first fastener 12 is disposed horizontally, penetrating the upper part of the assembly body A1 and the inner filling plate 11; the second fastener 13 is disposed horizontally, penetrating the lower part of the assembly body B2 and the inner filling plate 11.

[0089] The first fastener 12 is used to fix the upper part of the block body A1 to the inner filling plate 11, and the second fastener 13 is used to fix the lower part of the block body B2 to the inner filling plate 11, so that the inner filling plate 11 forms a fixed connection relationship with the block body A1 and the block body B2 respectively, thereby connecting the block body A1 and the block body B2 into one unit via the inner filling plate 11.

[0090] It should be noted that the first fastener 12 and the second fastener 13 can be connected by a bolt and nut, or other suitable fastening connection methods can be selected according to actual needs. This embodiment does not limit this. Optionally, multiple first fasteners 12 can be provided along the height direction of the assembled body A1. The multiple first fasteners 12 are distributed on the side of the anti-crack groove 6 away from the first sealing surface 301, so as to avoid the through hole corresponding to the first fastener 12 from being close to the anti-crack groove 6 and the area where the deformable wall is located, thereby reducing the superposition of stress concentration between different weak areas.

[0091] In a preferred embodiment, the insertion cavity 101 has a cavity bottom, and an overflow groove 14 is provided on the cavity bottom, the overflow groove 14 corresponding to the position of the groove body 5.

[0092] When the water-swellable material absorbs water and expands, and the expanded volume exceeds the capacity of the tank 5, the excess portion can enter the overflow trough 14, preventing the water-swellable material from exerting excessive compressive force on the surrounding structure due to insufficient expansion space. The volume of the overflow trough 14 can be designed based on the difference between the maximum expansion ratio of the water-swellable material and the volume of the tank 5, to ensure that the excess volume generated by the water-swellable material in its maximum expansion state can be completely contained by the overflow trough 14.

[0093] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A square-shaped structure, characterized in that, include: Assembly blocks A and B are used for assembly. The assembly body A has a insertion cavity, and the assembly body B has a tenon, which is inserted into the insertion cavity; The inner wall surface of the insertion cavity is the first sealing surface, and the outer wall surface of the tenon is the second sealing surface; A sealing ring is provided between the first sealing surface and the second sealing surface; Additionally, a vertical groove is provided on one side of the sealing ring, and the groove is filled with a water-swellable material.

2. The square structure according to claim 1, characterized in that, include: The anti-crack groove is formed in the cavity wall of the insertion cavity and is provided along its depth direction.

3. The square structure according to claim 2, characterized in that, include: A sealing element is disposed at the opening of the crack-prevention groove and seals the crack-prevention groove; The sealing component is made of rubber.

4. The square structure according to claim 3, characterized in that, A groove is provided on the main body B of the assembly, corresponding to the position of the sealing component; One part of the sealing component is disposed at the opening of the crack-prevention groove, and the other part is disposed inside the settling groove.

5. The square structure according to claim 2, characterized in that, The crack-resistant groove is filled with an elastic strip, wherein the compression modulus of the elastic strip is less than the compression modulus of the sealing ring, and less than the compression modulus of the water-swellable material after expansion.

6. The square structure according to claim 1, characterized in that, The sealing ring has the following characteristics: First sealing substrate and second sealing substrate; Wherein, the first sealing substrate is in contact with the first sealing surface, and the second sealing substrate is connected to the second sealing surface; Furthermore, the thickness of the second sealing substrate is less than the thickness of the first sealing substrate.

7. The square structure according to claim 6, characterized in that, A guide groove is provided on the first sealing surface at a position corresponding to the first sealing substrate: The guide groove has a wedge-shaped guide surface, and the depth of the guide groove is less than the thickness difference of the second sealing substrate before and after compression.

8. The square structure according to claim 1, characterized in that, It also includes an inner filling plate, which is arranged vertically and positioned between the main body A and the main body B of the assembly.

9. The square structure according to claim 8, characterized in that, It also includes the first fastener and the second fastener; The first fastener is disposed horizontally, penetrating the upper part of the main body A and the inner filling plate; The second fastener is horizontally positioned, penetrating the lower part of the main body B and the inner filling plate.

10. The square structure according to claim 1, characterized in that, An overflow groove is provided at the bottom of the cavity, and the overflow groove is positioned corresponding to the groove body.

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