Built-in drainage piece for old construction and self-heat-preservation frost-heaving-prevention drainage system of built-in drainage piece

Abstract

The utility model discloses a built-in drainage piece for old construction and a self-insulation frost heaving prevention drainage system of the built-in drainage piece. In the old building transformation process, frost heaving damage of the downpipe occurs frequently, the replacement rate is high, and the frost heaving damage problem of the downpipe cannot be thoroughly solved. Two side plates are vertically arranged on the other side of a main plate side by side, the other side of the main plate and the inner walls of the two side plates define a water falling cavity shaped like a Chinese character'fang ', the inner wall of each side plate is provided with a protruding part, and a plug cover strip is detachably connected between the two protruding parts; an outer cover plate strip in the plug cover strip is vertically arranged, an inner soft plug strip is integrally connected to the side, facing the main plate, of the outer cover plate strip in the length direction of the outer cover plate strip, when the plug cover strip is connected with the two side plates, the inner soft plug strip is clamped between the two protruding parts, and the outer cover plate strip is tightly attached to the outer end of each side plate.

Description

Technical Field

[0001] The utility model specifically relates to a built-in drainage component for old building renovation and a self-insulation and frost-heavy avoidance drainage system thereof, belonging to the technical field of building water supply and drainage. Background Art

[0002] Plastic downpipes installed on buildings can be damaged due to frost heaving. The frost heaving of downpipes is mainly caused by the freezing and expansion of water in the downpipes under low temperature conditions. This situation usually occurs in cold climates, especially when the downpipes are not properly insulated. The frost heaving of downpipes may cause pipe ruptures or affect their normal drainage function, and timely measures must be taken to resolve them. Methods to solve the frost heaving of downpipes include: Using hot water to thaw: You can boil a pot of hot water and slowly pour it into the sewer, and slowly clear it with wire at the same time, but be careful not to use excessive force to avoid damaging the sewer pipes.

[0003] Strengthen insulation measures: Add insulation materials to the outside of the downpipe, such as a hose protection, to reduce the impact of temperature fluctuations on the downpipe. In addition, for the frost heave problem of downpipes in specific environments such as cold storage, special attention should be paid to ventilation treatment, insulation thickness and the setting of air barrier to prevent the occurrence of frost heave. When dealing with the frost heave problem of downpipes, appropriate solutions should be selected according to the specific situation to ensure the normal function of the downpipe and extend its service life. During the renovation of old residential communities, only the material of downpipes can be changed to make them less prone to damage. However, the current insulation method still requires additional external accessories. Not only does the external layout of downpipes and their accessories affect the flatness of the building facade, but the circumferentially closed and exposed structure of downpipes fails to solve the frost heave problem, resulting in no corresponding treatment measures for blockage and damage caused by frost heave. There is a lack of standardized downpipe layout methods that can be combined with the actual reinforcement and renovation methods of old residential communities, and there is a lack of a unified treatment method that can take into account the continuous problems of frost heave caused by external hanging and damage caused by frost heave in low temperature environments. Utility Model Content

[0004] In order to overcome the defects of the prior art, a built-in drainage component for building renovation and a self-insulating and frost-proof drainage system are provided to solve the above problems.

[0005] A built-in drainage component for building renovation, comprising a main board, a plug cover strip and two side boards, the main board is arranged vertically, the side of the main board facing the building outer wall is the connection side, the two side boards are arranged vertically and in parallel on the other side of the main board, the other side of the main board and the inner walls of the two side boards form a Chinese-shaped drainage cavity, a convex portion is arranged on the inner wall of each side board, and the plug cover strip is detachably connected between the two convex portions;

[0006] The plugging strip includes an outer cover strip and an inner flexible plug strip. The outer cover strip is arranged vertically, and the inner flexible plug strip is integrally connected to the side of the outer cover strip facing the main board along the length direction of the outer cover strip. When the plugging strip is connected to the two side plates, the inner flexible plug strip is clamped between the two convex parts, and the outer cover strip is tightly attached to the outer end of each side plate.

[0007] A self-insulating and frost-heaving-preventing drainage system is composed of the building retrofit built-in drainage part 21 described in Embodiment 7, and includes a building retrofit built-in drainage part and two insulation boards. The building retrofit built-in drainage part includes a main board, a plugging strip and two side plates. The main board is arranged vertically, and the side facing the building exterior wall is the connection side. The two side plates are vertically arranged side by side on the other side of the main board. A U-shaped water drainage cavity is formed by enclosing between the other side of the main board and the inner walls of the two side plates. A convex part is processed on the inner wall of each side plate. The plugging strip is detachably connected between the two convex parts;

[0008] The plugging strip includes an outer cover strip and an inner flexible plug strip. The outer cover strip is arranged vertically, and the inner flexible plug strip is integrally connected to the side of the outer cover strip facing the main board along the length direction of the outer cover strip. When the plugging strip is connected to the two side plates, the inner flexible plug strip is clamped between the two convex parts, and the outer cover strip is tightly attached to the outer end of each side plate;

[0009] A connecting support plate and an outer support plate are arranged on the outer wall of each side plate. The connecting support plate and the outer support plate are arranged vertically side by side. An insertion slot is formed by enclosing between the outer support plate, the connecting support plate and the side plate. The two insulation boards are arranged side by side on both sides of the building retrofit built-in drainage part, and each insulation board is detachably connected to the insertion slot close to it.

[0010] The beneficial effects of the utility model are as follows:

[0011] In the utility model, the building retrofit built-in drainage part is an internal concealed drainage component corresponding to the post-insulation layer of the building exterior wall. The drainage structure formed by the cooperation of the main board, the plugging strip and the two side plates of the building retrofit built-in drainage part is in the form of a square flat pipe structure. While ensuring the basic drainage performance of itself, it can also be disassembled and maintained regularly. The arrangement position of the plugging strip is not only convenient for disassembly, but also can directly expose the internal structure of the U-shaped water drainage cavity in the building retrofit built-in drainage part after disassembly. When the plugging strip is detachably connected between the two convex parts, it can also provide a deformation space for the frost heaving of the main board and the two side plates by being squeezed and deformed itself in a low-temperature environment.

[0012] The self-insulating and frost-heaving-avoiding drainage system in the utility model is a drainage structure form which is installed and arranged together with the insulation layer in the process of building renovation. Two insulation plates are arranged on both sides of the built-in drainage parts for building renovation, so as to achieve the insulation effect of clamping the built-in drainage parts for building renovation on both sides, which is beneficial to reducing the influence of the external environment on the frost heaving of the built-in drainage parts for building renovation. In addition, the self-insulating and frost-heaving-avoiding drainage system has a flat appearance, avoids the external hanging arrangement of the existing downpipes, and is more beneficial to improving the regularity of the layout of the building drainage system. The structural form formed by the mutual cooperation between the main board, the plug cover strip and the two side boards of the built-in drainage parts for building renovation is beneficial to realize longitudinal disassembly, expose the drainage position, facilitate inspection and maintenance, and avoid damage caused by exposed frost heaving or weathering at the own position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the top view of a built-in drainage component for building renovation;

[0014] Figure 2 A top view structural diagram of another type of built-in drainage component for building renovation;

[0015] Figure 3 It is a schematic diagram of the top view of the plug cover strip;

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the plug cover strip;

[0017] Figure 5 It is a top view cross-sectional structural schematic diagram of a self-insulating and frost-heaving-avoiding drainage system;

[0018] Figure 6 A schematic diagram of the main structure showing the connection relationship between the main board and the two side boards;

[0019] Figure 7 This is a schematic diagram of the main structure of the built-in drainage components used in building renovation;

[0020] Figure 8 This is a top view structural diagram of the built-in drainage components for the third type of building renovation;

[0021] Fig. 9 This is a top view of the structure of the built-in drainage piece for the third type of building renovation, in which the raised part in the direction of the arrow is at the limit position of the corresponding side plate;

[0022] Fig.10 A three-dimensional structural diagram of the connection relationship between the main board and the two side boards;

[0023] Fig.11 A schematic diagram of a top-view cross-sectional structure of another self-insulating and frost-heaving-avoiding drainage system;

[0024] Fig.12This is the front view structural schematic diagram of the utility model used on the exterior wall of a building.

[0025] In the figure: 1 - main board; 2 - plug cover strip; 2 - 1 - outer cover strip; 2 - 2 - inner soft plug strip; 2 - 3 - recessed part; 2 - 4 - telescopic strip; 3 - side board; 4 - U-shaped water drainage cavity; 5 - protruding part; 6 - compensation strip; 7 - connecting support plate; 8 - connecting hole; 9 - outer support plate; 10 - insulation board; 11 - insertion slot; 12 - outer plaster layer; 13 - vertical plate body; 14 - sliding inner hole; 18 - limiting end; 19 - limiting groove; 20 - building exterior wall; 21 - built-in drainage part for building renovation. Specific embodiments

[0026] The following uses specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.

[0027] Specific embodiment one: Combining Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Fig. 9 、 Fig.10 、 Fig.11 and Fig.12 explain this embodiment. In this embodiment, the built-in drainage part 21 for building renovation includes a main board 1, a plug cover strip 2 and two side boards 3. The main board 1 is vertically arranged. The side facing the building exterior wall 20 of the main board 1 is the connection side. The two side boards 3 are vertically arranged side by side on the other side of the main board 1. A U-shaped water drainage cavity 4 is formed by enclosing between the other side of the main board 1 and the inner walls of the two side boards 3. A protruding part 5 is arranged on the inner wall of each side board 3. The plug cover strip 2 is detachably connected between the two protruding parts 5;

[0028] In this embodiment, the main board 1 enhances the heat insulation performance due to its location, so that the manufacturing material is no longer limited. It can use a stainless steel plate or a plastic plate. The materials of the two side boards 3 are the same as that of the main board 1. The thickness of the side board 3 is less than or equal to the thickness of the main board 1. The main board 1 and the side boards 3 are both strip-shaped plate bodies. One connection relationship between the main board 1 and the two side boards 3 is integrally formed. The main board 1 and the two side boards 3 are three plate bodies of two types enclosing to form a U-shaped plate body. The length direction of the U-shaped plate body is the same as the height direction of the building exterior wall 20. The arrangement position of the U-shaped plate body is the same as the arrangement position of the original downspout on the building exterior wall 20.

[0029] The built-in drainage member 21 in this utility model is a drainage component adapted for the secondary thermal insulation and reinforcement renovation of the building exterior wall 20, which can reduce the damage caused by frost heaving during the drainage process and can also provide an adapted position for self-thermal insulation.

[0030] Among them, the plug cover strip 2 includes an outer cover strip 2-1 and an inner soft plug strip 2-2. The outer cover strip 2-1 is vertically arranged, and the inner soft plug strip 2-2 is integrally connected to the side of the outer cover strip 2-1 facing the main board 1 along the length direction of the outer cover strip 2-1. When the plug cover strip 2 is connected to the two side plates 3, the inner soft plug strip 2-2 is clamped between the two convex parts 5, and the outer cover strip 2-1 is tightly attached to the outer ends of each side plate 3. The plug cover strip 2 is a strip body with both soft and hard properties. Its property of being both soft and hard is specifically for the purpose that it can not only contact its hard outer cover strip 2-1 and be stably buckled between the two side plates 3 to achieve the effect of external support, ensure the four-sided enclosure structure form of the entire U-shaped water drainage cavity 4, and prevent rainwater from flowing out, but also make use of the flexible characteristics of its built-in inner soft plug strip 2-2 to provide a deformation space for the main board 1 and the two side plates 3 through its own contraction or extrusion even under low temperature or in a frost heaving state with stored water.

[0031] The built-in structure form of this utility model does not affect the flatness of the building exterior facade, and multiple dense arrangements can be realized. The density achieved by multiple arrangements of this utility model can be higher than that of the existing external downpipe structure form, reducing the occurrence probability of complete drainage blockage.

[0032] This utility model can reduce the degree of frost heaving during the drainage process. Even if frost heaving occurs in the U-shaped water drainage cavity 4, it only needs to remove the plug cover strip 2, without damaging the overall structure of the built-in drainage member 21 for building renovation. During maintenance, it only needs to regularly replace the plug cover strip 2, without replacing the overall structure, reducing the maintenance cost.

[0033] Specific Embodiment 2: This embodiment is a further limitation of Specific Embodiment 1. A recess 2-3 is respectively processed on both sides of the inner soft plug strip 2-2, and each recess 2-3 is in snap-fit connection with the convex part 5 close to it. The shape of the recess 2-3 is matched with the shape of the convex part 5.

[0034] Specific Embodiment 3: This embodiment is a further limitation of Specific Embodiment 1 or 2. Combining Figure 1 、 Figure 2 和 Fig.11As shown, in this embodiment, each convex portion 5 is fixedly connected to its corresponding side plate 3. A specific structural form of the convex portion 5 is a convex rib, that is, a convex rib is machined on the inner wall of the side plate 3, and the length direction of the convex rib is the same as the length direction of the side plate 3. The convex rib is used to provide a abutting and clamping portion for the inner flexible plug strip 2-2. A clamping gap for fitting the inner flexible plug strip 2-2 is formed between two convex ribs. The width of the clamping gap is smaller than the width of the inner flexible plug strip 2-2. The inner flexible plug strip 2-2 is clamped into the clamping gap by shrinkage extrusion. Correspondingly, the inner flexible plug strip 2-2 is a strip body with a wider inner side and a narrower outer side, and its narrow side is connected to the outer cover strip 2-1.

[0035] Furthermore, another specific structural form of the convex portion 5 is a plurality of convex blocks. The plurality of convex blocks are arranged in sequence from top to bottom along the length direction of the corresponding side plate 3 to form a self-spacing multi-point convex structure. Two sets of multi-point convex structures are formed between the two side plates 3. A clamping gap is formed between the two sets of multi-point convex structures for clamping the inner flexible plug strip 2-2. The width of the clamping gap is smaller than the width of the inner flexible plug strip 2-2. The inner flexible plug strip 2-2 is clamped into the clamping gap by shrinkage extrusion. Correspondingly, the inner flexible plug strip 2-2 is a strip body with a wider inner side and a narrower outer side, and its shape is adapted to the shape of the recessed portion 2-3. The narrow side of the inner flexible plug strip 2-2 is connected to the outer cover strip 2-1. A recessed portion 2-3 is formed by enclosing between the narrow side of the inner flexible plug strip 2-2 and the inner wall of the outer cover strip 2-1. The recessed portion 2-3 is specifically a strip-shaped groove.

[0036] Specific Embodiment 4: This embodiment is a further limitation of Specific Embodiment 1 or 2. Combining Figure 8 and Fig. 9 As shown, in this embodiment, each convex portion 5 is slidably connected to its corresponding side plate 3. The side plate 3 is a vertical plate body, and the plate width direction of the side plate 3 is arranged along the plate thickness direction of the building exterior wall 20. The specific structure of the convex portion 5 is a vertical plate body 13. A sliding inner hole 14 is machined along the thickness direction of the vertical plate body 13, and the length direction of the sliding inner hole 14 is the same as the length direction of the vertical plate body 13. The vertical plate body 13 is sleeved on the side plate 3 through the sliding inner hole 14. The plate width direction of the vertical plate body 13 is the same as the length direction of the building exterior wall 20. The vertical plate body 13 reciprocally slides along the width direction of the side plate 3 to adapt to insulation boards 10 with different thicknesses and U-shaped water collecting cavities 4 with different drainage depths. After determining the installation position of the convex portion 5 on the side plate 3, the convex portion 5 is positioned by inserting the plug strip 2 between two convex portions 5.

[0037] Furthermore, the inner flexible plug strip 2-2 is a strip body with a wider inner side and a narrower outer side, and its shape is adapted to the shape of the recessed portion 2-3. The narrow side of the inner flexible plug strip 2-2 is connected to the outer cover strip 2-1. A recess is formed by enclosing between the narrow side of the inner flexible plug strip 2-2 and the inner wall of the outer cover strip 2-1 Figure 2-3 , the recess Figure 2-3 is specifically a strip-shaped groove.

[0038] Further, after the vertical plate body 13 is sleeved on the side plate 3, one end of it located on the outer wall of the side plate 3 can serve as another limiting end 18, which is used to limit the position of the outer wall of the heat preservation board 10, so as to stably position the heat preservation board 10 on the outer wall of the side plate 3, realize close-contact heat preservation for the side plate 3, and is beneficial to improving the heat preservation performance of the U-shaped water drainage cavity 4.

[0039] Further, limiting grooves 19 are respectively processed at the top and bottom ends of the side plate 3. When the sliding inner hole 14 in the vertical plate body 13 is sleeved on the side plate 3, the top and bottom ends of the vertical plate body 13 are respectively flush with the top and bottom ends of the side plate 3, so as to ensure the flatness of the ends of the vertical plate body 13 and the side plate 3 under the assembled relationship, which is beneficial to the installation on the building exterior wall 20. The limiting grooves 19 also play a role in limiting the sliding path of the vertical plate body 13, and the length of the limiting grooves 19 is the length of the sliding path of the vertical plate body 13.

[0040] The working principle of this embodiment:

[0041] After applying the asphalt protective layer on the building exterior wall 20, when it comes to installing the drainage component on the building exterior wall 20 according to the design requirements, the main board 1 with two side plates 3 is fixedly installed at the designated position on the building exterior wall 20, and then the heat preservation board 10 is installed. Adjust the position of the vertical plate body 13 according to the actual thickness of the heat preservation board 10 to ensure that the clamping distance between the limiting end 18 outside the vertical plate body 13 and the connecting support plate 7 matches the thickness of the heat preservation board 10. After the vertical plate body 13 is adjusted, each heat preservation board 10 is clamped between its corresponding limiting end 18 and the connecting support plate 7, and then each heat preservation board 10 is fixed. Then, the plug strip 2 is squeezed and inserted into the two side plates 3, and finally, cement mortar is applied to form the outer plastering layer 12. When the U-shaped water drainage cavity 4 has poor drainage, the outer plastering layer 12 can be damaged, the plug strip 2 is removed, check whether the U-shaped water drainage cavity 4 is blocked and perform corresponding treatment. After the treatment is completed, install the plug strip 2 again and reapply cement mortar to form the outer plastering layer 12.

[0042] During the above process, glue liquid or cement mortar can also be filled into the gap between the outer support plate 9 and the limiting end 18 to avoid the appearance of hollow positions.

[0043] Embodiment 5: This embodiment is a further limitation of Embodiment 4. When each convex portion 5 reciprocally slides along the width direction of its corresponding side plate 3, the plug cover strip 2 further includes a telescopic strip 2-4, and the telescopic strip 2-4 is specifically a corrugated plate. The telescopic direction of the telescopic strip 2-4 is the same as the thickness direction of the main board 1. The telescopic strip 2-4 can achieve the state change process of elongation or shortening in its thickness direction. The telescopic strip 2-4 is arranged between the outer cover strip 2-1 and the inner flexible plug strip 2-2, and is used to adapt to the final position where the convex portion 5 is positioned after sliding, so as to realize the stable connection between the two convex portions 5 and the plug cover strip 2. After the position of the thermal insulation board 10 is fixed, the installation positions of the two convex portions 5 and the plug cover strip 2 are also finally fixed, eliminating the self-positioning and locking process of the convex portion 5. During the installation process, first, the thermal insulation board 10 is installed and positioned, then the convex portion 5 is installed in cooperation, and finally the plug cover strip 2 is buckled on the two convex portions 5.

[0044] Embodiment 6: This embodiment is a further limitation of Embodiment 1, 2, 3, 4 or 5. Two compensating strips 6 are integrally connected in the U-shaped water drainage cavity 4. The two compensating strips 6 are vertically arranged side by side along the length direction of the main board 1. The cross-sectional shape of the compensating strip 6 is triangular. One compensating strip 6 is integrally connected between each side of the main board 1 and an adjacent side plate 3. The configuration of the compensating strip 6 is to weaken the shape of the inner wall end angle of the U-shaped water drainage cavity 4, and at the same time enhance the support strength, reduce the frost heaving degree of the inner cavity end angle of the U-shaped water drainage cavity 4, and facilitate the stable drainage process under low temperature in winter.

[0045] Embodiment 7: This embodiment is a further limitation of Embodiment 1, 2, 3, 4, 5 or 6. A connecting support plate 7 is arranged on the outer wall of each side plate 3. The length direction of the connecting support plate 7 is the same as the length direction of the main board 1. A plurality of connecting holes 8 are processed along the thickness direction of the connecting support plate 7. The connecting holes 8 are used for passing through connecting screws or other existing connecting parts to enhance the connection strength between the main board 1 and the building exterior wall 20.

[0046] Furthermore, the main board 1 and the building exterior wall 20 can also be connected by gluing.

[0047] Furthermore, on the one hand, the setting of the connecting support plate 7 provides an outer support position for enhancing the connection strength between the main board 1 and the building exterior wall 20, and on the other hand, it can also provide an installation position for clamping the thermal insulation board 10 and provide a guiding part for the thermal insulation board 10 to stably abut against the side plate 3.

[0048] Embodiment VIII: This embodiment is a further limitation of Embodiment I, II, III, IV, V, VI or VII. An outer support plate 9 is provided on the outer wall of each side plate 3. An insertion slot 11 for fitting the heat preservation plate 10 is formed by enclosing between the outer support plate 9, the connecting support plate 7 and the side plate 3. The insertion slot 11 is a U-shaped groove body for clamping the side of the heat preservation plate 10 close to the side plate 3.

[0049] Embodiment IX: In combination with Figures 1 to 12 describe this embodiment. The self-insulating anti-freezing and drainage system includes a building retrofit built-in drainage member 21 and two heat preservation plates 10. The building retrofit built-in drainage member 21 includes a main board 1, a plug cover strip 2 and two side plates 3. The main board 1 is arranged vertically. The side of the main board 1 facing the building exterior wall 20 is the connecting side. The two side plates 3 are arranged vertically and side by side on the other side of the main board 1. A U-shaped water falling cavity 4 is formed by enclosing between the other side of the main board 1 and the inner walls of the two side plates 3. A convex portion 5 is provided on the inner wall of each side plate 3. The plug cover strip 2 is detachably connected between the two convex portions 5;

[0050] In this embodiment, the main board 1 is a stainless steel plate or a plastic plate. The materials of the two side plates 3 are the same as that of the main board 1. The thickness of the side plate 3 is less than or equal to the thickness of the main board 1. The main board 1 and the side plates 3 are both strip-shaped plate bodies. One connection relationship between the main board 1 and the two side plates 3 is integrally formed. The main board 1 and the two side plates 3 are three plate bodies of two types enclosing to form a U-shaped plate body. The length direction of the U-shaped plate body is the same as the height direction of the building exterior wall 20. The arrangement position of the U-shaped plate body is the same as the arrangement position of the original downspout on the building exterior wall 20.

[0051] The building retrofit built-in drainage member 21 in the present utility model is a drainage member adapted for the secondary heat preservation and reinforcement renovation of the building exterior wall 20, which reduces the damage caused by frost heaving during the drainage process and can also provide an adapted position for self-insulation.

[0052] Among them, the plug cover strip 2 includes an outer cover strip 2-1 and an inner soft plug strip 2-2. The outer cover strip 2-1 is arranged vertically. The inner soft plug strip 2-2 is integrally connected to the side of the outer cover strip 2-1 facing the main board 1 along the length direction of the outer cover strip 2-1. When the plug cover strip 2 is connected to the two side plates 3, the inner soft plug strip 2-2 is clamped between the two convex portions 5, and the outer cover strip 2-1 is tightly attached to the outer end of each side plate 3. The plug cover strip 2 is a strip body with both soft and hard properties. Its soft and hard兼备 use performance is specifically for the purpose of both being able to contact its hard outer cover strip 2-1 and stably buckling between the two side plates 3 to achieve the effect of external support, ensuring the surrounding enclosure structure form of the entire U-shaped water falling cavity 4 to prevent rainwater from flowing out, and also being able to utilize the flexible characteristics of its built-in inner soft plug strip 2-2 to provide a deformation space for the main board 1 and the two side plates 3 through its own contraction or extrusion even under low temperature or in a frozen state with stored water.

[0053] On the outer wall of each side plate 3, a connecting support plate 7 and an outer support plate 9 are provided. The connecting support plate 7 and the outer support plate 9 are arranged vertically and side by side. An insertion slot 11 is formed by enclosing between the outer support plate 9, the connecting support plate 7 and the side plate 3. Two insulation boards 10 are arranged side by side on both sides of the building retrofit with the built-in drainage member 21. Each insulation board 10 is detachably connected to the adjacent insertion slot 11.

[0054] The structures and connection methods not mentioned in this embodiment are the same as those in the first, second, third, fourth, fifth, sixth, seventh or eighth specific embodiments.

[0055] Specific Embodiment Ten: This embodiment is a further limitation of Specific Embodiment Nine. In this embodiment, after the building retrofit with the built-in drainage member 21 and the two insulation boards 10 are installed on the building exterior wall 20, finally, the leveling of the building exterior can be achieved through the formation of the external plaster layer 12. Combining Figure 5 and Fig.11 As shown, there are two ways to form the external plaster layer 12. One way is to apply the external plaster layer 12 on the outer wall of each insulation board 10 to ensure that the outer wall is on the same vertical plane as the outer cover strip 2-1 after the external plaster layer 12 is applied. Another way is to apply the external plaster layer 12 outside the building retrofit with the built-in drainage member 21 and the two insulation boards 10, which simultaneously covers the building retrofit with the built-in drainage member 21 and the two insulation boards 10. The thickness at different positions is different. The thickness outside the building retrofit with the built-in drainage member 21 is the minimum thickness, and the thickness outside the insulation board 10 is the maximum thickness. Ensure that the outer wall is on the same vertical plane as the outer cover strip 2-1 after the external plaster layer 12 is applied. The thickness range of the external plaster layer 12 is 1.5 - 2.5 cm.

[0056] The installation process of the present utility model:

[0057] After applying the asphalt protective layer on the building exterior wall 20, when it comes to installing the drainage component on the building exterior wall 20 according to the design requirements, the main board 1 with two side plates 3 is fixedly installed at the specified position on the building exterior wall 20. Then, the two insulation boards 10 are respectively installed in the corresponding insertion slots 11, and then each insulation board 10 is fixed. Then, the plug cover strip 2 is squeezed and inserted into the two side plates 3. Finally, the cement mortar is applied to form the external plaster layer 12. When the U-shaped water drainage cavity 4 has poor drainage, the external plaster layer 12 can be damaged, the plug cover strip 2 can be removed, and it can be checked whether the U-shaped water drainage cavity 4 is blocked and corresponding treatment can be carried out. After the treatment is completed, the plug cover strip 2 is reinstalled, and the cement mortar is reapplied to form the external plaster layer 12.

Claims

1. A built-in drainage device for building renovation, characterized in that: It includes a main board (1), a plugging strip (2) and two side boards (3). The main board (1) is vertically arranged. The side of the main board (1) facing the building exterior wall (20) is the connection side. The two side boards (3) are vertically arranged side by side on the other side of the main board (1). A U-shaped water drainage cavity (4) is formed by enclosing between the other side of the main board (1) and the inner walls of the two side boards (3). A convex portion (5) is provided on the inner wall of each side board (3). The plugging strip (2) is detachably connected between the two convex portions (5); The plugging strip (2) includes an outer cover strip (2-1) and an inner flexible plug strip (2-2). The outer cover strip (2-1) is vertically arranged. The inner flexible plug strip (2-2) is integrally connected to the side of the outer cover strip (2-1) facing the main board (1) along the length direction of the outer cover strip (2-1). When the plugging strip (2) is connected to the two side boards (3), the inner flexible plug strip (2-2) is clamped between the two convex portions (5), and the outer cover strip (2-1) is tightly attached to the outer end of each side board (3).

2. The built-in drainage member for building renovation according to claim 1, characterized in that: Each convex portion (5) is fixedly connected or slidably connected to its corresponding side board (3).

3. The built-in drainage member for building renovation according to claim 2, characterized in that: Depressions (2-3) are respectively processed on both sides of the inner flexible plug strip (2-2). Each depression (2-3) is in snap-fit connection with the convex portion (5) close to it.

4. The built-in drainage member for building renovation according to claim 2 or 3, characterized in that: When each convex portion (5) reciprocally slides along the width direction of its corresponding side board (3), the plugging strip (2) further includes a telescopic strip (2-4). The telescopic strip (2-4) is arranged between the outer cover strip (2-1) and the inner flexible plug strip (2-2). The telescopic direction of the telescopic strip (2-4) is the same as the thickness direction of the main board (1).

5. The built-in drainage member for building renovation according to claim 1, characterized in that: Two filling strips (6) are integrally connected in the U-shaped water drainage cavity (4). The two filling strips (6) are vertically arranged side by side along the length direction of the main board (1). The transverse cross-sectional shape of the filling strip (6) is triangular. One filling strip (6) is integrally connected between each side of the main board (1) and its adjacent side board (3).

6. The built-in drainage member for building renovation according to claim 1, characterized in that: A connecting support plate (7) is provided on the outer wall of each side board (3). The length direction of the connecting support plate (7) is the same as the length direction of the main board (1). A plurality of connecting holes (8) are processed in the connecting support plate (7) along its thickness direction.

7. The built-in drainage member for building renovation according to claim 6, characterized in that: An outer support plate (9) is provided on the outer wall of each side board (3). An insertion slot (11) for fitting a heat preservation board (10) is formed by enclosing among the outer support plate (9), the connecting support plate (7) and the side board (3).

8. A self-insulating and frost-heaving drainage system, comprising the built-in drainage member (21) for building renovation according to claim 7, characterized in that: It includes a building retrofit internal drainage member (21) and two heat preservation boards (10). The building retrofit internal drainage member (21) includes a main board (1), a plugging strip (2) and two side boards (3). The main board (1) is vertically arranged. The side of the main board (1) facing the building exterior wall (20) is the connection side. The two side boards (3) are vertically arranged side by side on the other side of the main board (1). A U-shaped water drainage cavity (4) is formed by enclosing between the other side of the main board (1) and the inner walls of the two side boards (3). A convex portion (5) is processed on the inner wall of each side board (3). The plugging strip (2) is detachably connected between the two convex portions (5); The plugging strip (2) comprises an outer cover strip (2-1) and an inner flexible plugging strip (2-2), wherein the outer cover strip (2-1) is arranged vertically, and the inner flexible plugging strip (2-2) is integrally connected to a side of the outer cover strip (2-1) facing the main board (1) along the length direction of the outer cover strip (2-1); when the plugging strip (2) is connected to the two side panels (3), the inner flexible plugging strip (2-2) is clamped between the two protrusions (5), and the outer cover strip (2-1) is arranged in close contact with the outer end of each side panel (3); The outer wall of each side panel (3) is provided with a connecting support plate (7) and an outer support plate (9), the connecting support plate (7) and the outer support plate (9) are arranged vertically in parallel, and a plug-in groove (11) is formed between the outer support plate (9), the connecting support plate (7) and the side panel (3), and two insulation panels (10) are arranged in parallel on both sides of the built-in drainage member (21) for building renovation, and each insulation panel (10) is detachably connected to its adjacent plug-in groove (11).

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