Waterproof structure and prefabricated cabin

Abstract

The utility model discloses a waterproof structure and a prefabricated cabin, and relates to the technical field of prefabricated cabin assembly, and the waterproof structure comprises an upper-layer outer wall, a lower-layer outer wall, an upper-layer square tube and a lower-layer square tube. Wherein the upper-layer outer wall comprises a cabin outer side and a cabin inner side which are oppositely arranged; the lower-layer outer wall is arranged below the upper-layer outer wall; the lower-layer square tube is mounted at the top of the lower-layer outer wall in the extending direction of the lower-layer outer wall, and the side length of the lower-layer square tube is D1; the upper-layer square tube is installed at the bottom of the upper-layer outer wall in the extending direction of the upper-layer outer wall, the side length of the upper-layer square tube is D2, the top of the lower-layer square tube is fixedly connected with the bottom of the upper-layer square tube, and on the outer side of the cabin, the horizontal and vertical distance between the outer edge of the upper-layer square tube and the outer edge of the lower-layer square tube is L1 and 0 lt; l1 < = (D2-D1). According to the technical scheme provided by the utility model, the situation of leakage at the connecting seam of the double-layer prefabricated cabin can be avoided, so that the damage to the use safety of electrical equipment in the cabin is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated cabin assembly, in particular to a waterproof structure and a prefabricated cabin. Background Art

[0002] With the popularization of power grids, prefabricated cabins have been widely used in various power system projects, including substations, distribution stations, wind farms, photovoltaic stations and other traditional power fields and new energy fields. However, the land utilization rate of single-layer prefabricated cabins is low. In order to save costs in projects, the market demand for double-layer prefabricated cabins has gradually increased. The commonly used double-layer prefabricated cabins are prefabricated in the factory and then transported to the site for assembly. During assembly, the upper and lower prefabricated cabins are generally connected by welding. Since the welding quality at the joints is difficult to guarantee, as the use time increases, the joints are prone to leakage and seepage, which seriously endangers the safety of electrical equipment in the cabin.

[0003] In view of this, it is necessary to propose a waterproof structure and a prefabricated cabin to solve or at least alleviate the above technical problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a waterproof structure and a prefabricated cabin, aiming to solve the technical problem of water seepage and leakage at the connection of double-layer prefabricated cabins, which endangers the safety of electrical equipment in the cabin.

[0005] To achieve the above purpose, the utility model provides a waterproof structure, including:

[0006] an upper outer wall, the upper outer wall comprising an outer side of the cabin and an inner side of the cabin opposite to the outer side of the cabin;

[0007] A lower outer wall, the lower outer wall being arranged below the upper outer wall;

[0008] A lower layer square tube, the lower layer square tube is installed on the top of the lower layer outer wall along the extension direction of the lower layer outer wall;

[0009] An upper square tube, wherein the upper square tube is installed at the bottom of the upper outer wall along the extension direction of the upper outer wall, and the top of the lower square tube is fixedly connected to the bottom of the upper square tube;

[0010] Definition: The side length of the lower square tube is D1, the side length of the upper square tube is D2, and on the outside of the cabin, the horizontal distance between the outer edge of the upper square tube and the outer edge of the lower square tube is L1, where 0 <L1≤(D2-D1)。

[0011] In one embodiment, the waterproof structure further includes a waterproof member, and the top of the waterproof member is connected to the bottom of the upper square tube on the outside of the cabin.

[0012] In one embodiment, the waterproof member includes a waterproof square pipe with a side length of D3. On the outer side of the cabin, the top of the waterproof square pipe is connected to the bottom of the upper square pipe.

[0013] In one embodiment, the size of the waterproof square pipe satisfies: D3 ≤ L1.

[0014] In one embodiment, the outer edge of the waterproof square pipe and the outer edge of the upper square pipe are located in the same vertical plane.

[0015] In one embodiment, the lower end of the waterproof member adopts an oblique angle structure. From the outer side of the cabin to the inner side of the cabin, the height of the lower end of the waterproof member gradually increases.

[0016] In one embodiment, a sealant layer is provided in the gap formed between the upper square pipe and the lower square pipe.

[0017] In one embodiment, a waterproof layer is provided on the outer surface of the waterproof structure on the outer side of the cabin.

[0018] In one embodiment, a waterproof rubber strip is provided at the joint between the upper square pipe and the lower square pipe.

[0019] The present utility model also provides a prefabricated cabin, including the waterproof structure described in any one of the above, which at least includes an upper prefabricated cabin and a lower prefabricated cabin. The upper outer wall is located in the upper prefabricated cabin, and the lower outer wall is located in the lower prefabricated cabin.

[0020] In the technical solution of the present utility model, the waterproof structure includes the upper outer wall, the lower outer wall, the upper square pipe and the lower square pipe. Among them, the upper outer wall includes an outer side of the cabin and an inner side of the cabin opposite to the outer side; the lower outer wall is provided below the upper outer wall; the lower square pipe is installed on the top of the lower outer wall along the extension direction of the lower outer wall, and the side length of the lower square pipe is D1; the upper square pipe is installed on the bottom of the upper outer wall along the extension direction of the upper outer wall, and the side length of the upper square pipe is D2. The top of the lower square pipe is fixedly connected to the bottom of the upper square pipe. And on the outer side of the cabin, the horizontal vertical distance between the outer edge of the upper square pipe and the outer edge of the lower square pipe is L1, and 0 < L1 ≤ (D2 - D1). Through this setting, on the outer side of the cabin, the upper square pipe protrudes towards the outer side of the cabin compared with the lower square pipe, so that the connection seam between the upper square pipe and the lower square pipe is located at the bottom of the upper square pipe and is covered by the upper square pipe. In this way, when it rains, rainwater will not directly pour on the connection seam, avoiding the situation of water seepage and leakage at the connection seam, and thus will not endanger the safe use of the electrical equipment in the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A structural schematic diagram of an embodiment of a prefabricated cabin provided by the utility model;

[0023] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0024] Figure 3 for Figure 1 A magnified schematic diagram of point B in the middle.

[0025] Description of Figure Numbers:

[0026] 100. Prefabricated cabin; 10. Waterproof structure; 20. Upper prefabricated cabin; 30. Lower prefabricated cabin; 1. Upper wall; 2. Lower wall; 3. Upper square tube; 4. Lower square tube; 5. Waterproof parts; 5a. Waterproof square tube; 6. Notch.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0031] With the popularization of power grids, prefabricated cabins have been used in various power system projects. With the continuous growth of power demand, the in-depth development of renewable energy grid connection and smart grid technology, the power industry has an increasingly urgent need for efficient, reliable and easily expandable infrastructure. In this context, double-layer prefabricated cabins have gradually gained favor in the market. Double-layer prefabricated cabins are usually designed as multifunctional modular units that can be quickly deployed as auxiliary buildings for substations, control centers or power facilities. This prefabricated cabin can not only shorten the construction period and reduce the complexity and risk of on-site construction, but also its double-layer structure provides better heat insulation and sound insulation, which helps to improve the operating environment of power equipment and extend the service life of equipment.

[0032] However, the applicant has observed and studied that although the double-layer prefabricated cabin provides an efficient solution for the power industry, in actual applications, due to the combined effects of various factors such as construction quality, material selection, and environmental impact, the insufficient sealing performance of the joints between the upper and lower cabins of the double-layer prefabricated cabin may lead to water leakage, water seepage, etc., especially in the operating environment of power equipment, the intrusion of water vapor may not only damage the performance of the equipment, but also bring potential safety hazards. Therefore, ensuring the sealing and durability of the joints of the double-layer prefabricated cabin is crucial to ensure the stable operation of power facilities.

[0033] In view of this, the present invention proposes a waterproof structure 10 to solve the above technical problems.

[0034] See also Figures 1 to 3In one embodiment of the utility model, the waterproof structure 10 includes an upper outer wall 1, a lower outer wall 2, a lower square tube 4 and an upper square tube 3. Among them, the upper outer wall 1 includes an outer side of the cabin and an inner side of the cabin opposite to the outer side of the cabin; the lower outer wall 2 is arranged below the upper outer wall 1; the lower square tube 4 is installed on the top of the lower outer wall 2 along the extension direction of the lower outer wall 2; the upper square tube 3 is installed on the bottom of the upper outer wall 1 along the extension direction of the upper outer wall 1, and the top of the lower square tube 4 is fixedly connected to the bottom of the upper square tube 3. And it is defined that: the side length of the lower square tube 4 is D1, the side length of the upper square tube 3 is D2, and on the outer side of the cabin, the horizontal distance between the outer edge of the upper square tube 3 and the outer edge of the lower square tube 4 is L1, wherein 0 <L1≤(D2-D1)。

[0035] Specifically, see Figure 2 and Figure 3 The upper outer wall 1 is continuously installed on the top of the upper square tube 3. The extension direction of the upper outer wall 1 refers to the length direction of the outer peripheral surface of the upper outer wall 1. The length direction of the upper square tube 3 is the same as the length direction of the outer peripheral surface of the upper outer wall 1. The upper square tube 4 is arranged at the bottom of the upper outer wall 3, so that the upper square tube 3 serves as the bearing ring beam of the upper outer wall 1 to bear the load transferred by the upper outer wall 1; the lower square tube 4 is installed on the top of the lower outer wall 2, and the lower square tube 4 is continuously arranged along the top of the lower outer wall 2, wherein the lower outer The extension direction of the wall 2 is the same as that of the upper outer wall 1, and the length direction of the outer peripheral surface of the lower outer wall 2 is the same as that of the lower square tube 4, so that the lower square tube 4 serves as the top ring beam of the lower outer wall 2, which is used to improve the integrity of the lower outer wall 2 and bear the load transmitted by the upper square tube 3; the upper structure includes both the upper outer wall 1 and the upper square tube 3, and the lower structure includes both the lower outer wall 2 and the lower square tube 4. The connection between the upper structure and the lower structure is achieved through the connection between the upper square tube 3 and the lower square tube 4. In this embodiment, the outer side of the cabin is arranged opposite to the inner side of the cabin, and the outer side of the cabin is the side of the upper structure in contact with the external environment. Figure 2 In the example, the outer side of the cabin is the leftmost side of the upper wall 1, and Figure 3Among them, the outside of the cabin refers to the rightmost side of the upper wall 1. The upper square tube 3 and the lower square tube 4 are arranged in parallel. The bottom surface of the upper square tube 3 is connected to the top surface of the lower square tube 4. The connection form usually adopts the full welding process to improve the overall structural stiffness and waterproofness. There will be a connection seam at the connection of the upper square tube 3 and the lower square tube 4. Further, the side length of the upper square tube 3 is D1, and the side length of the lower square tube 4 is D2. On the outside of the cabin, the outer edges of the upper square tube 3 and the lower square tube 4 are not in the same vertical plane. The outer edge of the upper square tube 3 protrudes more than that of the lower square tube 4. The horizontal vertical distance between the outer edge of the upper square tube 3 and the outer edge of the lower square tube 4 is L1. In order to make the protruding part of the upper square tube 3 cover the connection seam and ensure the connection quality, the horizontal vertical distance L1 needs to satisfy 0 < L1 ≤ (D2 - D1). In Figure 2 Among them, the horizontal vertical distance L1 refers to the horizontal distance between the leftmost side of the upper square tube 3 and the leftmost side of the lower square tube 4; in Figure 3 Among them, the horizontal vertical distance L1 refers to the horizontal distance between the rightmost side of the upper square tube 3 and the rightmost side of the lower square tube 4. In the design stage, it is necessary to consider both the structural force and the thickness of the connection seam to determine the specific value of L1. Generally speaking, the value of L1 is the length by which the upper square tube 3 protrudes from the lower square tube 4. In order to achieve a good rainproof effect, this length should be at least greater than the welding thickness of the connection seam.

[0036] In this embodiment, the side length D1 of the upper square tube 3 is 200 mm, the side length D2 of the lower square tube 4 is 100 mm, and the horizontal vertical distance L1 between the outer edge of the upper square tube 3 and the outer edge of the lower square tube 4 is 70 mm. That is, on the outside of the cabin, the upper square tube 3 protrudes 70 mm more than the lower square tube 4, which is used to cover the connection seam between the upper square tube 3 and the lower square tube 4.

[0037] In an embodiment of the present utility model, the waterproof structure 10 includes an upper outer wall 1, a lower outer wall 2, an upper square pipe 3 and a lower square pipe 4. Among them, the upper outer wall 1 includes an outer side of the cabin and an inner side of the cabin opposite to the outer side of the cabin; the lower outer wall 2 is arranged below the upper outer wall 1; the lower square pipe 4 is installed at the top of the lower outer wall 2 along the extending direction of the lower outer wall 2, and the side length of the lower square pipe 4 is D1; the upper square pipe 3 is installed at the bottom of the upper outer wall 1 along the extending direction of the upper outer wall 1, and the side length of the upper square pipe 3 is D2. The top of the lower square pipe 4 is fixedly connected to the bottom of the upper square pipe 3. And on the outer side of the cabin, the horizontal vertical distance between the outer edge of the upper square pipe 3 and the outer edge of the lower square pipe 4 is L1, and 0 < L1 ≤ (D2 - D1). Through this setting, on the outer side of the cabin, the upper square pipe 3 protrudes towards the outer side of the cabin compared with the lower square pipe 4, so that the connection seam between the upper square pipe 3 and the lower square pipe 4 is located at the bottom of the upper square pipe 3 and is covered by the upper square pipe 3. In this way, when it rains, rainwater will not directly pour on the connection seam, avoiding the situation of water seepage and leakage at the connection seam, and thus will not endanger the use safety of the electrical equipment in the cabin.

[0038] Previously, for the problem of water leakage and seepage at the connection between the upper structure and the lower structure of the prefabricated cabin 100, a common solution was to set a layer of rain shield above the connection seam between the upper cabin and the lower cabin to prevent rainwater from directly falling on the connection seam. However, this setting will make the overall appearance of the double-layer prefabricated cabin 100 very obtrusive. And because there will also be a weld between the rain shield and the outer wall of the upper cabin during installation, the sealing performance of the weld cannot be guaranteed during on-site construction. This situation causes rainwater to flow into the connection seam between the upper cabin and the lower cabin through the weld between the rain shield and the upper cabin, which may still lead to phenomena such as water leakage and seepage, endangering the use safety of the electrical equipment in the cabin. While in the embodiment of the present utility model, the protruding part of the upper square pipe 3 is used as the rain shield structure. The integrity of the square pipe is good and there will be no rainwater leakage phenomenon. Therefore, it is difficult for rainwater to leak to the connection seam, thus avoiding the situation of leakage at the connection seam.

[0039] Furthermore, in an embodiment of the present utility model, the waterproof structure 10 further includes a waterproof member 5. On the outer side of the cabin, the top of the waterproof member 5 is connected to the bottom of the upper square pipe 3. Please refer to Figure 2 With Figure 3A waterproof member 5 is installed at the bottom of the portion of the upper square tube 3 protruding to the outside of the cabin. The waterproof member 5 includes at least one of an I-beam, a square tube, a steel plate and a plastic. The waterproof member 5 is used to prevent rainwater from flowing from the upper square tube 3 to the connection seam. When the rainfall is heavy, rainwater may flow along the surface of the upper square tube 3 to the connection seam. To avoid this, a waterproof member 5 is arranged outside the connection seam. When rainwater flows along the outer surface of the upper square tube 3 to the connection seam, due to the blocking of the waterproof member 5, the rainwater will flow and drip on the surface of the waterproof member 5, and will not continue to flow to the connection seam, so that the connection seam is kept dry, and water droplets are prevented from penetrating into the cabin along the connection seam to endanger the operation safety of electrical equipment.

[0040] Furthermore, the waterproof part 5 includes a waterproof square tube 5a, the side length of the waterproof square tube 5a is D3, and the top of the waterproof square tube 5a is connected to the bottom of the upper square tube 3 on the outside of the cabin. Compared with steel materials such as I-beams, square tubes have the advantages of good integrity, high structural stability, uniform cross-section, and are more convenient to weld, so the waterproof part 5 is processed using the waterproof square tube 5a. In addition, in the horizontal direction, the square tube has two layers of outer walls. Even if one layer of the outer wall is corroded by rainwater, the other layer of the outer wall also has a waterproof effect, so that the connection seam between the upper square tube 3 and the lower square tube 4 can be prevented from being corroded by rainwater for a long time, thereby extending the service life of the prefabricated cabin 100. In this embodiment, the side length D3 of the waterproof square tube 5a is greater than or equal to L1. At this time, the waterproof square tube 5a is larger in size and can completely cover the connection seam. This design can further ensure that the connection seam is in a dry environment.

[0041] In another embodiment of the utility model, the size of the waterproof square tube 5a satisfies: D3≤L1. Considering cost control, the size of the waterproof square tube 5a should not be too large. If the size of the waterproof square tube 5a is too large, the overall appearance of the prefabricated cabin 100 will be inconsistent and affect the aesthetics. On the other hand, the small-sized waterproof square tube 5a is more convenient for on-site installation, which is conducive to improving the overall assembly efficiency of the prefabricated cabin 100. Therefore, in this embodiment, the size of the waterproof square tube 5a must satisfy D3≤L1. Specifically, D3 is 50mm.

[0042] Furthermore, on the basis of satisfying D3≤L1 and D3 being 50 mm, the outer edge of the waterproof square tube 5a and the outer edge of the upper square tube 3 are located in the same vertical plane. Figure 2 and Figure 3, the side length of the waterproof square tube 5a is 50mm, and L1 is 70mm. At this time, the outer edge of the waterproof square tube 5a and the outer edge of the upper square tube 3 are located in the same vertical plane, that is, a 20mm wide notch 6 is formed between the waterproof square tube 5a and the lower square tube 4. The function of the notch 6 is the same as the drip groove set on the waterproof eaves of the building structure. When it rains heavily, due to the attraction between water molecules and the influence of wind, water droplets may gradually move toward the inside of the cabin along the outer surface of the waterproof square tube 5a. Before entering the notch 6, the water The gravity of the water drop cannot overcome the attraction between water molecules, so it is difficult for the water drop to fall to the ground. When the water drop is about to enter the notch 6, due to the height difference between the bottom surface of the waterproof square tube 5a and the top surface of the notch 6, it is difficult for the water drop to overcome the gravity and do work upward, so it will gradually gather in the bottom area of ​​the waterproof square tube 5a near the inside of the cabin. After a period of time, the mass of the water drop gradually increases, and its gravity can overcome the attraction between water molecules. At this time, the water drop falls to the ground, and so on. The water drop will not move to the connection seam, and then there will be no water seepage or leakage at the connection seam. In addition, there is a certain distance between the notch 6 and the lower outer wall 2. Rainwater dripping from the edge of the notch 6 can prevent rainwater from sliding down the lower outer wall 2, which helps to protect the lower outer wall 2 from rain damage and extend the service life of the prefabricated cabin 100.

[0043] In one embodiment of the utility model, the lower end of the waterproof member 5 adopts an angled structure, and the height of the lower end of the waterproof member 5 gradually increases from the outside of the cabin to the inside of the cabin. This arrangement can form a tip at the lower end of the waterproof member 5, gather rainwater at the tip of the waterproof member 5, and then drip from the tip, preventing rainwater from flowing along the outer surface of the waterproof member 5 to the lower outer wall 2 and the connection seam, reducing the splashing of rainwater on the lower outer wall 2, and avoiding affecting the dryness of the connection seam. In addition, this arrangement can accelerate the dripping speed of rainwater or snow water, reduce the possibility of icicle formation in winter, and avoid the formation of icicles falling and injuring people.

[0044] In one embodiment of the utility model, a sealant layer is provided in the gap formed between the upper square tube 3 and the lower square tube 4. Since electrical equipment has high requirements for the operating environment, it is necessary to provide multiple layers of waterproof measures. In this embodiment, since the components in the waterproof structure 10 are all processed in the factory and then transported to the site for assembly, it is inevitable that there will be a gap at the connection surface of the upper square tube 3 and the lower square tube 4. When the upper square tube 3 and the lower square tube 4 are connected, a layer of sealant is provided in advance at the connection surface of the two to fill the gap between the two, so as to further improve the anti-leakage performance of the waterproof structure 10.

[0045] Furthermore, in one embodiment of the utility model, the outer surface of the waterproof structure 10 outside the cabin is provided with a waterproof layer. In order to prevent water penetration, a waterproof layer is provided on the outer surface of the upper outer wall 1, the lower outer wall 2, the upper square tube 3 and the lower square tube 4, which can be specifically a layer of waterproof paint. Through this arrangement, on the one hand, it is possible to prevent water from penetrating into the waterproof structure 10, protect the waterproof structure 10 from water damage, and thus extend the service life of the waterproof structure 10; on the other hand, by providing a waterproof layer, it is possible to avoid erosion of the waterproof structure 10 or at least reduce the erosion area, thereby reducing the maintenance cost caused by erosion of the structure.

[0046] In order to further improve the waterproof effect, in one embodiment of the utility model, a waterproof adhesive strip is provided at the joint of the upper square tube 3 and the lower square tube 4. Specifically, during installation, after the upper square tube 3 and the lower square tube 4 are connected, wait for a period of time until the temperature at the joint drops to room temperature, and apply a layer of waterproof adhesive to the outer surface of the joint along the length direction of the joint to protect the joint. Since it is only applied to the joint, the overall shape of the waterproof adhesive after coating is strip-shaped. The waterproof adhesive strip includes at least one of PVC weld sealant, hemming sealant and polyurethane sealant.

[0047] In addition, the utility model also provides a prefabricated cabin 100, which includes the waterproof structure 10 in the above-mentioned embodiments, and at least includes an upper prefabricated cabin 20 and a lower prefabricated cabin 30, the upper exterior wall 1 is located in the upper prefabricated cabin 20, and the lower exterior wall 2 is located in the lower prefabricated cabin 30. That is to say, the waterproof structure 10 in the above-mentioned embodiments can be used in prefabricated cabins 100 of any number of layers. For example, in one embodiment, the prefabricated cabin 100 has only two layers of structure, namely, the upper prefabricated cabin 20 and the lower prefabricated cabin 30. Then, the upper outer wall 1 in the waterproof structure 10 is located in the upper prefabricated cabin 20, and the lower outer wall 2 is located in the lower prefabricated cabin 30. The upper outer wall 1 and the lower outer wall 2 are connected through the upper square tube 3 and the lower square tube 4. In another embodiment, the prefabricated cabin 100 is provided with a three-layer structure, which are respectively the first prefabricated cabin, the second prefabricated cabin and the third prefabricated cabin from bottom to top. Then, the waterproof structure 10 in the above-mentioned embodiments can be respectively arranged between the first prefabricated cabin and the second prefabricated cabin, and between the second prefabricated cabin and the third prefabricated cabin. The outer wall of the second prefabricated cabin is the upper outer wall 1 relative to the first prefabricated cabin, but is the lower outer wall 2 relative to the third prefabricated cabin.

[0048] Since the prefabricated cabin 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0049] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A waterproof structure, characterized in that: include: an upper outer wall, the upper outer wall comprising an outer side of the cabin and an inner side of the cabin opposite to the outer side of the cabin; A lower outer wall, the lower outer wall being arranged below the upper outer wall; A lower layer square tube, the lower layer square tube is installed on the top of the lower layer outer wall along the extension direction of the lower layer outer wall; An upper square tube, wherein the upper square tube is installed at the bottom of the upper outer wall along the extension direction of the upper outer wall, and the top of the lower square tube is fixedly connected to the bottom of the upper square tube; Definition: The side length of the lower square tube is D1, the side length of the upper square tube is D2, and on the outside of the cabin, the horizontal distance between the outer edge of the upper square tube and the outer edge of the lower square tube is L1, where 0 <L1≤(D2-D1)。 2. The waterproof structure according to claim 1, characterized in that: The waterproof structure also includes a waterproof component, and the top of the waterproof component is connected to the bottom of the upper square tube on the outside of the cabin.

3. The waterproof structure according to claim 2, characterized in that: The waterproof component comprises a waterproof square tube, the side length of the waterproof square tube is D3, and the top of the waterproof square tube is connected to the bottom of the upper square tube on the outside of the cabin.

4. The waterproof structure according to claim 3, characterized in that: The size of the waterproof square tube satisfies: D3≤L1.

5. The waterproof structure according to claim 4, characterized in that: The outer edge of the waterproof square tube and the outer edge of the upper square tube are located on the same vertical plane.

6. The waterproof structure according to claim 2, characterized in that: The lower end of the waterproof component adopts an oblique angle structure, and the height of the lower end of the waterproof component gradually increases from the outer side of the cabin to the inner side of the cabin.

7. The waterproof structure according to any one of claims 1 to 6, characterized in that: A sealing rubber layer is arranged in the gap formed between the upper square tube and the lower square tube.

8. The waterproof structure according to any one of claims 1 to 6, characterized in that: The waterproof structure is provided with a waterproof layer on the outer surface of the cabin.

9. The waterproof structure according to any one of claims 1 to 6, characterized in that: A waterproof rubber strip is provided at the joint between the upper square tube and the lower square tube.

10. A prefabricated cabin, comprising the waterproof structure as claimed in any one of claims 1 to 9, characterized in that: It at least comprises an upper prefabricated cabin and a lower prefabricated cabin, wherein the upper outer wall is located in the upper prefabricated cabin, and the lower outer wall is located in the lower prefabricated cabin.

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