A waterproof structure of prefabricated external sandwich wall panel

Abstract

The present invention relates to a waterproof structure of a prefabricated external sandwich wall panel. The transverse joints and longitudinal joints of adjacent prefabricated external sandwich wall panels are sequentially provided with metal inserts, a first weather-resistant adhesive layer, a first foaming plugging layer, a water-conducting layer, a second foaming plugging layer, and a second weather-resistant adhesive layer from the outside to the inside; a water-retaining groove with a lower outside and a higher inside is also provided between the water-conducting layer and the second foaming plugging layer of the transverse joint; the cross section of the metal insert is Ω-shaped and is installed at the outermost side of the transverse joint and the longitudinal joint. The present invention improves the waterproof performance of the nodes of the prefabricated sandwich wall panel through multiple waterproof facilities; the structure of the prefabricated sandwich concrete external wall hanging panel itself is also modified, and the installation performance and waterproof performance are improved by prefabricating a card slot for clamping the first foaming plugging layer and the second foaming plugging layer; the structure and installation design of the metal insert are ingenious, taking into account both the waterproof performance and the decorative effect.

Description

Technical Field

[0001] The invention relates to a waterproof structure of a prefabricated external sandwich wallboard and belongs to the technical field of prefabricated components of buildings. Background Art

[0002] All prefabricated components are manufactured in a factory assembly line, and the manufactured products are directly used for on-site assembly. It is difficult to ensure the waterproof performance of existing prefabricated wall panels when they are installed on site. How to provide a prefabricated external sandwich wall panel that can ensure waterproof performance at the nodes when it is installed on site is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0003] The purpose of the present invention is to provide a prefabricated external sandwich wall panel, which can improve the waterproof performance of the nodes of the prefabricated sandwich wall panel through multiple waterproof facilities.

[0004] The present invention adopts the following technical solutions:

[0005] A waterproof structure of a prefabricated external sandwich wall panel, wherein the transverse joints and longitudinal joints of adjacent prefabricated external sandwich wall panels are sequentially provided with metal inserts, a first weather-resistant adhesive layer, a first foaming sealing layer, a water-conducting layer, a second foaming sealing layer, and a second weather-resistant adhesive layer from the outside to the inside; a water-retaining groove with a lower outer side and a higher inner side is also provided between the water-conducting layer and the second foaming sealing layer of the transverse joint; the cross-section of the metal insert is Ω-shaped and is installed at the outermost sides of the transverse joint and the longitudinal joint.

[0006] Preferably, a fireproof rock wool sealing layer 4 is further provided on the inner side of the second weather-resistant adhesive layer.

[0007] Furthermore, the innermost side of the fireproof rock wool sealing layer 4 is flush with the inner wall of the prefabricated external sandwich wall panel.

[0008] Preferably, the first foaming sealing layer and the second foaming sealing layer are both foaming chloroprene rubber sealing strips 1.

[0009] Preferably, a fireproof rock wool sealing layer 4 is provided between the inner side of the prefabricated external sandwich wall panel and the cast-in-place structure 6, a top of the fireproof rock wool sealing layer 4 is provided with an elastic caulking material sealing structure, and a metal cover plate 5 is used for edge finishing.

[0010] Preferably, a water conducting cavity and a water conducting pipe are provided in the water conducting layer; a water conducting cavity 8 and a water conducting pipe 9 are provided in the water conducting layer; the water conducting cavity 8 is located in the upper and lower adjacent prefabricated external sandwich wall panels, and the upper surface position of the lower prefabricated external sandwich wall panel is concave; the water conducting pipe 9 is pre-buried in the prefabricated external sandwich wall panel, the upper end of which is connected to the water conducting cavity 8, and the lower end extends to the condensate accumulation pipe for unified collection.

[0011] Preferably, both the transverse joints and the longitudinal joints of the prefabricated external sandwich wall panels are provided with clamping grooves for clamping the first foaming sealing layer and the second foaming sealing layer.

[0012] The beneficial effects of the present invention are:

[0013] 1) Prefabricated sandwich concrete exterior wall panels have through-plate seams between prefabricated components. Multiple structural waterproofing and material waterproofing measures are adopted from the outside to the inside. Multiple waterproofing facilities are used to improve the waterproof performance of the prefabricated sandwich wall panel nodes.

[0014] 2) The structure of the prefabricated sandwich concrete exterior wall hanging panel itself has also been modified. By prefabricating a slot for clamping the first foaming sealing layer and the second foaming sealing layer, the installation performance and waterproof performance have been improved.

[0015] 3) The structure and installation design of the metal insert are ingenious, taking into account both waterproof performance and decorative effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the longitudinal section of the waterproof structure of the prefabricated external sandwich wall panel of the present invention.

[0017] Figure 2 It is a schematic diagram of the longitudinal section of a pair of prefabricated external sandwich wall panels.

[0018] Figure 3 It is a schematic diagram of the cross section of the waterproof structure of the prefabricated external sandwich wall panel of the present invention.

[0019] Figure 4 It is a schematic diagram of the longitudinal section of the prefabricated external sandwich wall panel.

[0020] Figure 5 It is a schematic diagram of a longitudinal section of a waterproof structure of a prefabricated external sandwich wall panel of the present invention in another embodiment.

[0021] In the figure, 1. Foamed chloroprene rubber layer, 2. Weather-resistant rubber layer, 3. Externally embedded metal strips, 4. Fireproof rock wool sealing layer, 5. Metal cover plate, 6. Cast-in-place structure, 7. Thermal insulation material, 8. Water-conducting cavity, 9. Metal water-conducting pipe. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Embodiment 1:

[0024] Precast concrete sandwich insulation external wall panels are installed differently from traditional PC components on cast-in-place platforms. The components are directly connected to each other. All PC components are connected and anchored to the cast-in-place main structure by metal connectors. There is no post-casting strip after the overall installation of the components. The upper, lower, left and right board seams between components are filled with foamed chloroprene rubber sealing strips, fireproof rock wool, and weather-resistant glue. Among them, the foamed chloroprene rubber strips need to be relatively soft to avoid stress on the outer blades of the precast components. The specific instructions are as follows:

[0025] See also Figure 1-Figure 4 A waterproof structure of a prefabricated external sandwich wall panel. The transverse joints and longitudinal joints of adjacent prefabricated external sandwich wall panels are sequentially provided with metal inserts, a first weather-resistant adhesive layer, a first foam sealing layer, a water-conducting layer, a second foam sealing layer, and a second weather-resistant adhesive layer from the outside to the inside; a water-retaining groove with a lower outside and a higher inside is also provided between the water-conducting layer and the second foam sealing layer of the transverse joint; the cross-section of the metal insert is Ω-shaped and is installed at the outermost sides of the transverse joint and the longitudinal joint.

[0026] In this embodiment, see Figure 1 and 3 A fireproof rock wool sealing layer 4 is also provided on the inner side of the second weather-resistant rubber layer.

[0027] In this embodiment, see Figure 1 and 3 The innermost side of the fireproof rock wool sealing layer 4 is flush with the inner wall of the prefabricated external sandwich wall panel.

[0028] In this embodiment, the first foaming sealing layer and the second foaming sealing layer are both foaming chloroprene rubber sealing strips 1 .

[0029] In this embodiment, see Figure 1 and 3 A fireproof rock wool sealing layer 4 is provided between the inner side of the prefabricated external sandwich wall panel and the cast-in-place structure 6. An elastic caulking material sealing structure is provided on the top of the fireproof rock wool sealing layer 4, and a metal cover plate 5 is used for edge finishing.

[0030] In this embodiment, the transverse joints and the longitudinal joints of the prefabricated external sandwich wall panel are both provided with clamping grooves for clamping the first foaming sealing layer and the second foaming sealing layer.

[0031] Embodiment 2:

[0032] See also Figure 5 The difference between this embodiment and the first embodiment is that:

[0033] A water conducting cavity 8 and a water conducting pipe 9 are provided in the water conducting layer; a water conducting cavity 8 and a water conducting pipe 9 are provided in the water conducting layer; the water conducting cavity 8 is located in the upper and lower adjacent prefabricated external sandwich wall panels, and the upper surface of the lower prefabricated external sandwich wall panel is concave; the water conducting pipe 9 is pre-buried in the prefabricated external sandwich wall panel, the upper end of which is connected to the water conducting cavity 8, and the lower end extends to the condensed water accumulation pipe for unified collection.

[0034] The rest is the same as in the first embodiment.

[0035] Prefabricated sandwich concrete exterior wall panels, because the prefabricated components have through-plate seams, multiple structural waterproofing and material waterproofing measures are adopted from the outside to the inside:

[0036] The first layer is material waterproofing measures. According to the building facade effect, the outer side of the board seam is an exterior caulking metal strip 3 to form the first layer of water retaining;

[0037] The second layer, material waterproofing measures, two-component weatherproof sealant 2, long-term water barrier;

[0038] The third layer is a waterproof material, a double-layer foamed neoprene strip 1, which is not only the backing of the sealant, but also has a water-blocking function;

[0039] The fourth layer is to construct waterproof measures, water-conducting cavities and water-conducting pipes, and combine water-blocking and water-conducting;

[0040] The fifth layer is to construct waterproof measures, structural tongue and groove, and set water-retaining structural tongue and groove in places prone to water accumulation;

[0041] The sixth layer, material waterproofing measures, double-layer foamed neoprene strips are not only the last measure to block water, but also an important measure to achieve the air tightness of precast concrete exterior wall panels.

[0042] Full size test results:

[0043] Test process:

[0044] Air tightness test, water tightness test, wind pressure resistance test, in-plane deformation test were carried out respectively, and the air tightness test and water tightness test were repeated. Then, when the weather-resistant sealant on the outside partially failed under the simulated natural state, the air tightness, water tightness, wind pressure resistance and other aspects of the prefabricated components were tested again. Finally, when all water-retaining and waterproofing measures on the outside failed and only the double-layer foamed chloroprene rubber strip on the inside remained, the air tightness, water tightness, wind pressure resistance and other aspects of the prefabricated components were tested under the extreme condition of simulating that all water-retaining and waterproofing measures on the outside failed.

[0045] Among them, the airtightness test process is: before the positive and negative pressure tests, three pressure pulses with an absolute value of 500Pa of pressure difference are applied respectively, lasting for 3s, and then the test is started after the pressure returns to zero; the watertightness test process is: the water spray device is installed on one side of the facade of the test sample. First, the entire sample is evenly sprayed with water for 10 minutes in the initial state of the laboratory, and then the positive pressure difference is applied step by step according to the loading procedure of the pressurized tax information or the sample has a serious leakage position, and then the load is unloaded to 0Pa to end the spraying; the wind pressure resistance test process is: install the displacement meter, and before the positive and negative pressure tests, three pressure pulses with an absolute value of 500Pa of pressure difference are applied respectively, lasting for 3s, and then the test is started after the pressure returns to zero; the in-plane deformation performance test process is: first push the movable beam to make a cycle of left and right relative displacement in the plane as a preload, and then make three cycles of relative repeated movement. After the three cycles, the openable part of the event is opened and closed 5 times, and then closed, and the process data is recorded.

[0046] Test data and results

[0047]

[0048]

[0049] Embodiment 2 is a preferred embodiment.

[0050] The above is a preferred embodiment of the present invention. Ordinary technicians in this field can also make various changes or improvements on this basis. Without departing from the overall concept of the present invention, these changes or improvements should all fall within the scope of protection required by the present invention.

Claims

1. A waterproof structure of a prefabricated external sandwich wall panel, characterized in that: The transverse joints and longitudinal joints of adjacent prefabricated external sandwich wall panels are provided with metal inserts, a first weather-resistant adhesive layer, a first foaming sealing layer, a water-conducting layer, a second foaming sealing layer, and a second weather-resistant adhesive layer in sequence from the outside to the inside; A water-retaining groove with a lower outer side and a higher inner side is also provided between the water-conducting layer of the transverse joint and the second foaming blocking layer; The metal fillet has an Ω-shaped cross section and is installed at the outermost sides of the transverse joint and the longitudinal joint; A fireproof rock wool sealing layer (4) is also provided on the inner side of the second weather-resistant rubber layer; The water-conducting layer is provided with a water-conducting cavity (8) and a water-conducting pipe (9); the water-conducting cavity (8) is located in the upper and lower adjacent prefabricated external sandwich wall panels, and the upper surface of the lower prefabricated external sandwich wall panel is concave; the water-conducting pipe (9) is pre-buried in the prefabricated external sandwich wall panel, the upper end of which is connected to the water-conducting cavity (8), and the lower end of which extends to the condensed water accumulation pipe for unified collection; the water-conducting pipe (9) extends inwardly and does not contact the thermal insulation material (7); The transverse joints and the longitudinal joints of the prefabricated external sandwich wallboard are both provided with clamping grooves for clamping the first foaming sealing layer and the second foaming sealing layer.

2. The waterproof structure of the prefabricated external sandwich wall panel according to claim 1, characterized in that: The innermost side of the fireproof rock wool sealing layer (4) is flush with the inner wall of the prefabricated external sandwich wall panel.

3. The waterproof structure of the prefabricated external sandwich wall panel according to claim 1, characterized in that: The first foaming sealing layer and the second foaming sealing layer are both foaming chloroprene rubber sealing strips (1).

4. The waterproof structure of the prefabricated external sandwich wall panel according to claim 1, characterized in that: A fireproof rock wool sealing layer (4) is provided between the inner side of the prefabricated external sandwich wall panel and the cast-in-place structure (6), a top of the fireproof rock wool sealing layer (4) is provided with an elastic caulking material sealing structure, and a metal cover plate (5) is used for edge finishing.

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