Combined type flow guide water pipe suitable for vertical seam of PC external wall panel, drainage structure and construction method of combined type flow guide water pipe

Abstract

The invention discloses a combined flow guide water pipe suitable for a vertical seam of a PC external wall panel, a drainage structure and a construction method thereof.The drainage structure comprises the combined flow guide water pipe which is obliquely arranged at the lower end of the vertical seam of the PC external wall panel and comprises a water guide inner pipe extending into the vertical seam and a water guide outer pipe connected into the water guide inner pipe in an inserted and pulled mode; part of the water guide outer pipe is located in the vertical seam, and part of the water guide outer pipe is exposed out of the outer side of the PC outer wallboard; the lower weather-proof sealant is constructed in the vertical seam of the PC external wall panel; the PE rod is upwards filled in the vertical seam of the PC external wall panel along the combined flow guide water pipe, a cavity is reserved between the PE rod and the bottom surface of the vertical seam of the PC external wall panel, and the water guide inner pipe located in the vertical seam is communicated with the cavity; and the upper weather-proof sealant is upwards arranged on the outer side of the PE rod along the combined flow guide water pipe. The damaged flow guide water pipe can be conveniently replaced and repaired, and leakage of the PC external wall panel is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly relates to a combined water diversion pipe, a drainage structure suitable for vertical joints of PC exterior wall panels, and a construction method thereof. Background Art

[0002] In prefabricated buildings, due to requirements such as construction error control, waterproof structure, and adaptation to building deformation, vertical joints and horizontal joints need to be provided between PC exterior wall panels, with a size of about 20 mm. Considering that water accumulation in the vertical joints may cause leakage hazards, water diversion pipes need to be provided in the vertical joints at certain intervals to drain the accumulated water in the vertical joints through the water diversion pipes. In actual construction, since the water diversion pipes are installed during the construction of the sealant in the vertical joints, during the construction of exterior wall processes such as painting the exterior of the PC exterior wall panels, the water diversion pipes exposed outside the PC exterior wall panels may be damaged due to collision with painting tools or may be damaged due to the large air pressure spraying force of the spraying facilities hitting the water diversion pipes, thus affecting the drainage of the accumulated water in the vertical joints between the PC exterior wall panels and resulting in potential safety hazards of water leakage in the vertical joints of the PC exterior wall panels. Summary of the Invention

[0003] The purpose of the present invention is to provide a combined water diversion pipe, a drainage structure suitable for vertical joints of PC exterior wall panels, and a construction method thereof to solve the problem that the water diversion pipes are difficult to repair during the painting of the exterior of the PC exterior wall panels, leading to potential safety hazards of water leakage in the vertical joints of the PC exterior wall panels.

[0004] To solve the above technical problems, the present invention provides a drainage structure suitable for vertical joints of PC exterior wall panels, including:

[0005] A combined water diversion pipe, which is inclined and arranged at the lower end of the vertical joint of the PC exterior wall panel. The combined water diversion pipe includes a water diversion inner pipe extending into the vertical joint and a water diversion outer pipe inserted and connected into the water diversion inner pipe. Part of the water diversion outer pipe is located in the vertical joint and part is exposed outside the PC exterior wall panel;

[0006] A lower weather-resistant sealant, which is constructed in the vertical joint of the PC exterior wall panel below the combined water diversion pipe;

[0007] A PE rod, which is filled upward along the combined water diversion pipe in the vertical joint of the PC exterior wall panel. There is a cavity left between the PE rod and the bottom surface of the vertical joint of the PC exterior wall panel, and the water diversion inner pipe located in the vertical joint is communicated with the cavity;

[0008] An upper weather-resistant sealant, which is arranged upward along the combined water diversion pipe outside the PE rod.

[0009] Furthermore, the drainage structure provided by the present invention is suitable for the vertical seam of the PC exterior wall panel, and the port of the water-conducting inner pipe close to the bottom surface of the vertical seam of the PC exterior wall panel is a water inlet, and the water inlet is an oblique port flush with the horizontal plane.

[0010] Furthermore, the drainage structure suitable for the vertical seam of the PC exterior wall panel provided by the present invention has more than four annular convex buckle teeth arranged inside the inner wall of the connection between the inner water guide tube and the outer water guide tube, and more than four annular buckle teeth arranged on the outer circumference of the connection between the outer water guide tube and the inner water guide tube, one of the annular convex buckle teeth and the annular buckle teeth is a hard material tooth, and the other is a soft plastic tooth, and the outer water guide tube and the inner water guide tube are locked and connected by the annular convex buckle teeth and the annular buckle teeth.

[0011] Furthermore, the present invention provides a drainage structure suitable for vertical seams of PC exterior wall panels, wherein a positioning plate is installed at the connecting end of the inner water-conducting pipe and the outer water-conducting pipe.

[0012] Furthermore, the present invention provides a drainage structure suitable for vertical seams of PC exterior wall panels, wherein the outer water-conducting pipe is a diameter-changing body.

[0013] In order to solve the above technical problems, the present invention also provides a construction method of a drainage structure suitable for a vertical seam of a PC exterior wall panel, comprising:

[0014] Apply lower weatherproof sealant at the lower end of the vertical seam of the PC exterior wall panel;

[0015] A combined water guide pipe is obliquely installed on the lower weatherproof sealant, wherein the combined water guide pipe comprises an inner water guide pipe extending into the vertical seam, and an outer water guide pipe plugged and connected to the inner water guide pipe, wherein a portion of the outer water guide pipe is located in the vertical seam and a portion is exposed outside the PC exterior wallboard;

[0016] PE rods are filled upward along the combined water diversion pipe in the vertical seam of the PC exterior wall panel and upper weather-resistant sealant is applied so that the combined water diversion pipe is embedded in the weather-resistant sealant, and the vertical seam is sealed by the PE rods and the weather-resistant sealant to form a cavity, and the water guide inner pipe located in the vertical seam is connected to the cavity.

[0017] Furthermore, the construction method of the drainage structure suitable for the vertical seam of the PC exterior wall panel provided by the present invention includes applying glue to seal the horizontal seam perpendicular to the vertical seam before constructing the lower weatherproof sealant at the lower end of the vertical seam of the PC exterior wall panel.

[0018] In order to solve the above technical problems, the present invention provides a combined water guide pipe suitable for vertical seams of PC exterior wall panels, comprising an inner water guide pipe and an outer water guide pipe pluggably connected to the inner water guide pipe.

[0019] Furthermore, the combined water diversion pipe applicable to the vertical joint of the PC exterior wall panel provided by the present invention is provided with more than four annular convex buckle teeth on the inner wall at the connection of the inner water diversion pipe and the outer water diversion pipe, and more than four annular buckle teeth are provided on the outer circumference at the connection of the outer water diversion pipe and the inner water diversion pipe. One of the annular convex buckle teeth and the annular buckle teeth is a hard material tooth, and the other is a soft plastic tooth. The outer water diversion pipe and the inner water diversion pipe are tightly connected by the engagement of the annular convex buckle teeth and the annular buckle teeth.

[0020] Furthermore, the outer water diversion pipe of the combined water diversion pipe applicable to the vertical joint of the PC exterior wall panel provided by the present invention is a variable diameter body.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The combined water diversion pipe, drainage structure and construction method applicable to the vertical joint of the PC exterior wall panel provided by the present invention install the combined water diversion pipe in the vertical joint of the PC exterior wall panel through weather-resistant sealant. A cavity communicating with the combined water diversion pipe is formed between the bottom surface in the vertical joint of the PC exterior wall panel through the weather-resistant sealant and the PE rod. When painting the exterior wall on the PC exterior wall panel and its vertical joint, when the painting tool collides with the outer water diversion pipe of the combined water diversion pipe and causes its breakage or other damages, or when the pneumatic spraying force of the spraying facility impacts the outer water diversion pipe and causes its damage, the damaged outer water diversion pipe is pulled out from the inner water diversion pipe, and a new outer water diversion pipe is inserted for replacement, so as to realize the repair construction of the combined water diversion pipe in the vertical joint between the PC exterior wall panels. Thus, after the exterior wall painting of the PC exterior wall panel is completed, the construction quality of the combined water diversion pipe can still be guaranteed, and the loss can be avoided. Therefore, the accumulated water such as rainwater in the cavity at the vertical joint between the PC exterior wall panels can be smoothly discharged through the repaired combined water diversion pipe, and the potential safety hazard problem of leakage of the PC exterior wall panel can be avoided. Description of the Drawings

[0023] Figure 1 It is a front view structural schematic diagram of a drainage structure applicable to the vertical joint of the PC exterior wall panel;

[0024] Figure 2 For Figure 1 The sectional view at A-A in

[0025] Figure 3 For Figure 1 The sectional view at B-B in

[0026] Figure 4 For Figure 3 The enlarged view at C in

[0027] Figure 5 It is a side view structural schematic diagram of the inner water diversion pipe;

[0028] Figure 6 It is a top view structural schematic diagram of the water guiding inner pipe;

[0029] Figure 7 It is a front view structural schematic diagram of the water guiding inner pipe;

[0030] Figure 8 It is a side view structural schematic diagram of the water guiding outer pipe;

[0031] As shown in the figure:

[0032] 1 - Combined water guiding pipe;

[0033] 11 - Water guiding inner pipe, 111 - Inner pipe body, 112 - Water inlet, 113 - Convex buckle teeth, 114 - Positioning plate;

[0034] 12 - Water guiding outer pipe, 121 - Water outlet, 122 - Outer pipe body, 123 - Buckle teeth, 124 - Connection port;

[0035] 2 - PC exterior wall panel, 3 - Horizontal joint, 4 - Vertical joint, 5 - Cavity, 6 - Lower weatherproof sealant, 6' - Upper weatherproof sealant, 7 - PE rod, 8 - Cast - in - place concrete, 9 - Flame - retardant insulation board. Specific embodiments

[0036] The present invention will be described in detail below with reference to the accompanying drawings: According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non - precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0037] Please refer to Figures 1 to 4 , the embodiment of the present invention provides a drainage structure applicable to the vertical joint of a PC exterior wall panel, including a combined water guiding pipe 1, a lower weatherproof sealant 6, an upper weatherproof sealant 6', and a PE rod 7.

[0038] Please refer particularly to Figure 3 , wherein the combined water guiding pipe 1 is inclined and arranged at the lower end of the vertical joint 4 of the PC exterior wall panel 2. The combined water guiding pipe 1 includes a water guiding inner pipe 11 extending into the vertical joint 4 and a water guiding outer pipe 12 inserted and connected in the water guiding inner pipe 11. Part of the water guiding outer pipe 12 is located in the vertical joint 4 and part is exposed outside the PC exterior wall panel 2.

[0039] Please refer particularly to Figure 3 , wherein the lower weatherproof sealant 6 is located below the combined water guiding pipe 1 and is constructed in the vertical joint 4 of the PC exterior wall panel 2. The lower weatherproof sealant 6 can support and fix the inclination angle of the combined water guiding pipe 1. At this time, the combined water guiding pipe 1 can be partially embedded in the lower weatherproof sealant 6, thereby ensuring its temporarily installed inclination angle.

[0040] Please refer to with emphasis Figure 3 , in which the PE rod 7 is filled upward along the combined water diversion pipe 1 into the vertical joint 4 of the PC exterior wall panel 2. A cavity 5 is left between the bottom surface of the PE rod 7 and the vertical joint 4 of the PC exterior wall panel 2. The water diversion inner pipe 11 located in the vertical joint 4 is communicated with the cavity 5.

[0041] Please refer to with emphasis Figure 3 , in which the upper weather-resistant sealant 6', is arranged upward along the combined water diversion pipe 1 outside the PE rod 7. The upper weather-resistant sealant 6' can seal and fix the combined water diversion pipe 1 to ensure its permanent inclination angle.

[0042] Please refer to Figures 1 to 4 , The embodiment of the present invention also provides a construction method for the drainage structure applicable to the vertical joint of the PC exterior wall panel, including:

[0043] Step S1, construct the lower weather-resistant sealant 6 at the lower end of the vertical joint 4 of the PC exterior wall panel 2. The PC exterior wall panel 2 is composed of a concrete outer leaf panel and a sandwich thermal insulation layer.

[0044] Step S2, install the combined water diversion pipe 1 obliquely on the lower weather-resistant sealant 6. The combined water diversion pipe 1 includes a water diversion inner pipe 11 extending into the vertical joint 4 and a water diversion outer pipe 12 inserted and connected in the water diversion inner pipe 11. Part of the water diversion outer pipe 12 is located in the vertical joint 4 and part is exposed outside the PC exterior wall panel 2. The top view projection distance of the water diversion pipe 1 in Figure 3 is less than the thickness of the vertical joint 4 of the PC exterior wall panel 2.

[0045] Step S3, fill the PE rod 7 and construct the upper weather-resistant sealant 6' upward along the combined water diversion pipe 1 in the vertical joint 4 of the PC exterior wall panel 2, so that the combined water diversion pipe 1 is embedded in the weather-resistant sealant 6, and the vertical joint 4 is sealed by the PE rod 7 and the weather-resistant sealant 6 to form a cavity 5. The water diversion inner pipe 11 located in the vertical joint 4 is communicated with the cavity 5.

[0046] The drainage structure applicable to the vertical joints of PC exterior wall panels and its construction method provided by the embodiments of the present invention install the combined water guiding pipe 1 in the vertical joint 4 of the PC exterior wall panel 2 through the lower weather-resistant sealant 6, and form a cavity 5 communicating with the combined water guiding pipe 1 between the upper weather-resistant sealant 6' and the bottom surface in the vertical joint 4 of the PC exterior wall panel 2 through the PE rod 7. When applying exterior wall paint on the PC exterior wall panel 2 and its vertical joint 4, if the water guiding outer pipe 12 of the combined water guiding pipe 1 is damaged such as broken due to the collision of the painting tool, or if it is damaged due to the pneumatic spraying force of the spraying facility hitting the water guiding outer pipe 12, the damaged water guiding outer pipe 12 is pulled out from the water guiding inner pipe 11, and a new water guiding outer pipe 12 is inserted for replacement, so as to realize the repair construction of the combined water guiding pipe 1 in the vertical joint 4 of the PC exterior wall panel 2. Thus, the construction quality of the combined water guiding pipe 1 can still be guaranteed after the exterior wall paint of the PC exterior wall panel 2 is completed, avoiding missing. Therefore, the accumulated water such as rainwater in the cavity 5 at the vertical joint 4 of the PC exterior wall panel 2 can be smoothly discharged through the repaired combined water guiding pipe 1, avoiding the problem of potential safety hazards of leakage of the PC exterior wall panel 2. Among them, the vertical joint 4 plays roles such as adjusting construction errors and slight building deformations. Since there is a cavity 5 that is prone to water storage and causes leakage problems, it is necessary to guide drainage. The combined water guiding pipe 1 can be installed every three floors for drainage. Among them, the lower weather-resistant sealant 6 and the upper weather-resistant sealant 6' have obvious sealing and waterproof functions to prevent rainwater from entering the vertical joint 4, and the general depth is controlled at about 5-6 mm.

[0047] In order to ensure the stability of the construction of the lower weather-resistant sealant 6 at the lower part of the vertical joint 4, for the construction method of the drainage structure applicable to the vertical joints of PC exterior wall panels provided by the embodiments of the present invention, before constructing the lower weather-resistant sealant 6 at the lower end of the vertical joint 4 of the PC exterior wall panel 2, caulking and sealing are carried out at the horizontal joint 3 perpendicular to the vertical joint 4. The colloid at the horizontal joint 3 can also be a weather-resistant sealant, which can carry the lower weather-resistant sealant 6 and prevent the lower weather-resistant sealant 6 from piling up downward and affecting the installation elevation and inclination angle of the combined water guiding pipe 1.

[0048] Please refer to Figures 3 to 7 , in order to ensure that the combined water guiding pipe 1 discharges the accumulated water in the cavity 5 at the vertical joint 4 completely and avoid a small amount of accumulation at the bottom, for the drainage structure applicable to the vertical joints of PC exterior wall panels and its construction method provided by the embodiments of the present invention, the port of the water guiding inner pipe 11 close to the bottom surface of the vertical joint 4 of the PC exterior wall panel 2 is the water inlet 112, and the water inlet 112 is an inclined port flush with the horizontal plane.

[0049] Please refer to Figure 4 、 Figure 5 and Figure 8, the drainage structure applicable to the vertical joints of PC exterior wall panels and its construction method provided by the embodiments of the present invention. There are more than four annular convex fastening teeth 113 arranged inside the inner wall at the connection of the water guiding inner pipe 11 and the water guiding outer pipe 12. There are more than four annular fastening teeth 123 arranged on the outer circumference at the connection of the water guiding outer pipe 12 and the water guiding inner pipe 11. One of the annular convex fastening teeth 113 and the annular fastening teeth 123 is a hard material tooth, and the other is a soft plastic tooth. The water guiding outer pipe 12 and the water guiding inner pipe 11 are bite-locked and connected through the annular convex fastening teeth 113 and the annular fastening teeth 123. The soft plastic tooth can be a rubber tooth. Under a relatively large pulling force or thrust, the soft plastic tooth can deform to ensure the plug-in connection between the water guiding inner pipe 11 and the water guiding outer pipe 12, facilitating the replacement of the water guiding outer pipe 12. To ensure the reliability of the connection between the water guiding inner pipe 11 and the water guiding outer pipe 12, the protruding height of the convex fastening teeth 113 can be in the range of 0.5 mm to 1 mm. The diameter of the inner pipe body 111 of the guiding inner pipe 11 is 10 mm, and it is a PVC pipe with a wall thickness of not less than 1 mm.

[0050] Please refer to Figures 5 to 7 , to facilitate the positioning and installation of the water guiding outer pipe 12 and the water guiding inner pipe 11, the drainage structure applicable to the vertical joints of PC exterior wall panels and its construction method provided by the embodiments of the present invention. A positioning plate 114 is installed at the connection end of the water guiding inner pipe 11 and the water guiding outer pipe 12. Through the positioning plate 114, it is convenient for the guiding outer pipe 12 to be inserted and connected to the water guiding inner pipe 11.

[0051] Please refer to Figure 4 and Figure 8 , to ensure the sealing performance of the connection between the water guiding outer pipe 12 and the water guiding inner pipe 11, the drainage structure applicable to the vertical joints of PC exterior wall panels and its construction method provided by the embodiments of the present invention. The water guiding outer pipe 12 is a variable diameter body. The water guiding outer pipe 13 gradually increases from its connection port 124 towards the water outlet 121, that is, the outer pipe body 122 of the water guiding outer pipe 12 is frustum-shaped. The diameter of the connection port 124 of the water guiding outer pipe 12 can be 8 mm, and the diameter of the water outlet 121 can be 10 mm.

[0052] The drainage structure applicable to the vertical joints of PC exterior wall panels and its construction method provided by the embodiments of the present invention. The inner side of the PC exterior wall panel 2 is a flame-retardant insulation board 9 and cast-in-place concrete 8.

[0053] Please refer to Figures 4 to 8, an embodiment of the present invention further provides a combined water guiding pipe 1 applicable to the vertical joint of a PC exterior wall panel, which includes a water guiding inner pipe 11 and a water guiding outer pipe 12 inserted and connected to the water guiding inner pipe 11 in a plug-and-play manner. To ensure the reliable connection between the water guiding inner pipe 11 and the water guiding outer pipe 12, more than four annular convex buckle teeth 113 are provided on the inner wall at the connection between the water guiding inner pipe 11 and the water guiding outer pipe 12, and more than four annular buckle teeth 123 are provided on the outer circumference at the connection between the water guiding outer pipe 12 and the water guiding inner pipe 11. One of the annular convex buckle teeth 113 and the annular buckle teeth 123 is a hard material tooth, and the other is a soft plastic tooth. The water guiding outer pipe 12 and the water guiding inner pipe 11 are locked and connected by the engagement of the annular convex buckle teeth 113 and the annular buckle teeth 123. To ensure the sealing performance of the connection between the water guiding outer pipe 12 and the water guiding inner pipe 11, the water guiding outer pipe 12 can be a variable diameter body.

[0054] When the combined water guiding pipe 1 applicable to the vertical joint of the PC exterior wall panel provided by the embodiment of the present invention is in use, it is installed in the vertical joint 4 of the PC exterior wall panel 2. When applying exterior wall paint to the PC exterior wall panel 2 and its vertical joint 4, if the painting tool collides with the water guiding outer pipe 12 of the combined water guiding pipe 1, causing it to break or be damaged, or if the pneumatic spraying force of the spraying facility impacts the water guiding outer pipe 12 and causes it to be damaged, the damaged water guiding outer pipe 12 is pulled out from the water guiding inner pipe 11, and a new water guiding outer pipe 12 is inserted for replacement, so as to realize the repair construction of the combined water guiding pipe 1 in the vertical joint 4 of the PC exterior wall panel 2. Thus, after the exterior wall paint of the PC exterior wall panel 2 is completed, the construction quality of the combined water guiding pipe 1 can still be guaranteed, and the loss can be avoided. The combined water guiding pipe 1 after the repair construction smoothly discharges the accumulated water such as rainwater in the cavity 5 at the vertical joint 4 of the PC exterior wall panel 2, avoiding the problem of potential safety hazards of leakage of the PC exterior wall panel 2.

[0055] For the combined water guiding pipe 1 applicable to the vertical joint of the PC exterior wall panel, the drainage structure and its construction method provided by the embodiment of the present invention, the water guiding outer pipe 12 in the combined water guiding pipe 1 can be conveniently inserted and pulled out on the water guiding inner pipe 11, which is convenient for replacing the damaged water guiding outer pipe 12 exposed outside the PC exterior wall panel 2, avoiding the problem that the traditional non-combined water guiding pipe is inconvenient to repair after being damaged, resulting in its loss, and improving the retention rate of the water guiding pipe. It also avoids the problem that the traditional water guiding pipe needs to remove a certain area of the paint layer, remove the filling structure in the vertical joint, reinstall the water guiding pipe, and then paint the paint layer, resulting in complicated construction procedures, as well as the problem that the secondary repaired paint layer and the original paint layer produce cracks, affecting the painting quality of the paint layer on the exterior surface of the PC exterior wall panel.

[0056] The present invention is not limited to the above specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. Thus, if these modifications and changes of the present invention are within the scope of the claims of the present invention, the present invention also intends to include these modifications and changes.

Claims

1. A drainage structure applicable to the vertical joints of PC exterior wall panels, characterized in that, Comprising: A combined water guiding pipe, which is obliquely arranged at the lower end of the vertical joint of the PC exterior wall panel. The combined water guiding pipe includes a water guiding inner pipe extending into the vertical joint, and a water guiding outer pipe inserted and connected in the water guiding inner pipe. The water guiding outer pipe is partially located in the vertical joint and partially exposed outside the PC exterior wall panel; A lower weather resistant sealant, which is constructed in the vertical joint of the PC exterior wall panel below the combined water guiding pipe; A PE rod, which is filled upward along the combined water guiding pipe in the vertical joint of the PC exterior wall panel. There is a cavity left between the PE rod and the bottom surface of the vertical joint of the PC exterior wall panel, and the water guiding inner pipe located in the vertical joint is communicated with the cavity; An upper weather resistant sealant, which is arranged upward along the combined water guiding pipe outside the PE rod.

2. The drainage structure applicable to the vertical joints of PC exterior wall panels according to claim 1, characterized in that, The port of the water guiding inner pipe close to the bottom surface of the vertical joint of the PC exterior wall panel is the water inlet, and the water inlet is an inclined opening flush with the horizontal plane.

3. The drainage structure applicable to the vertical joint of the PC exterior wall panel according to claim 1, characterized in that, There are more than four annular convex buckle teeth arranged on the inner wall at the connection of the water guiding inner pipe and the water guiding outer pipe, and more than four annular buckle teeth are arranged on the outer circumference at the connection of the water guiding outer pipe and the water guiding inner pipe. One of the annular convex buckle teeth and the annular buckle teeth is a hard material tooth, and the other is a soft plastic tooth. The water guiding outer pipe and the water guiding inner pipe are connected and locked by the engagement of the annular convex buckle teeth and the annular buckle teeth.

4. The drainage structure applicable to the vertical joints of PC exterior wall panels according to claim 1, characterized in that, A positioning plate is installed at the connection end of the water guiding inner pipe and the water guiding outer pipe.

5. The drainage structure applicable to the vertical joints of PC exterior wall panels according to claim 1, characterized in that, The water guiding outer pipe is a variable diameter body.

6. A construction method for a drainage structure applicable to vertical joints of PC exterior wall panels according to any one of claims 1 to 5, characterized in that, Comprising: Construct a lower weather resistant sealant at the lower end of the vertical joint of the PC exterior wall panel; Obliquely install a combined water guiding pipe on the lower weather resistant sealant. The combined water guiding pipe includes a water guiding inner pipe extending into the vertical joint, and a water guiding outer pipe inserted and connected in the water guiding inner pipe. The water guiding outer pipe is partially located in the vertical joint and partially exposed outside the PC exterior wall panel; Fill a PE rod and construct an upper weather resistant sealant upward along the combined water guiding pipe in the vertical joint of the PC exterior wall panel, so that the combined water guiding pipe is embedded in the weather resistant sealant, and the vertical joint is sealed by the PE rod and the weather resistant sealant to form a cavity. The water guiding inner pipe located in the vertical joint is communicated with the cavity.

7. The construction method of the drainage structure applicable to the vertical joints of PC exterior wall panels according to claim 6, characterized in that, Before constructing the lower weather resistant sealant at the lower end of the vertical joint of the PC exterior wall panel, apply sealant to seal the horizontal joint perpendicular to the vertical joint.

8. A combined water diversion pipe applicable to the vertical joints of PC exterior wall panels, characterized in that, Including a water guiding inner pipe and a water guiding outer pipe inserted and connected in the water guiding inner pipe.

9. The combined water diversion pipe applicable to the vertical joint of the PC exterior wall panel according to claim 8, characterized in that, There are more than four annular convex buckle teeth arranged on the inner wall at the connection of the water guiding inner pipe and the water guiding outer pipe, and more than four annular buckle teeth are arranged on the outer circumference at the connection of the water guiding outer pipe and the water guiding inner pipe. One of the annular convex buckle teeth and the annular buckle teeth is a hard material tooth, and the other is a soft plastic tooth. The water guiding outer pipe and the water guiding inner pipe are connected and locked by the engagement of the annular convex buckle teeth and the annular buckle teeth.

10. The combined water diversion pipe applicable to the vertical joint of the PC exterior wall panel according to claim 8, characterized in that, The water guiding outer pipe is a variable diameter body.

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