A prefabricated transfer layer exterior wall connecting cavity grouting and sealing structure

Abstract

This invention discloses a prefabricated grouting and sealing structure for the connecting cavity of an exterior wall in a transition layer, belonging to the field of grouting and sealing technology. It includes a right-angle mounting bracket, with baffles at both ends along its length. A first slider is provided on one surface of the bracket, with a sliding groove on the first slider. A second slider is provided within the sliding groove, and the first and second sliders are perpendicularly arranged. The height of the first and second sliders is less than the height of the baffles. Right-angle sealing strips are provided on both sides of the first slider, covering the sliding groove. A first pushing mechanism and a second pushing mechanism are respectively provided on the second baffle, which are used to control the displacement of the first and second sliders towards the right angle of the right-angle mounting bracket. This technical solution addresses the problem of poor sealing effect for the connecting cavity of the exterior wall in a transition layer in existing technologies.

Description

Technical Field

[0001] This invention belongs to the field of grouting and sealing technology, specifically relating to a grouting and sealing structure for the connecting cavity of the exterior wall of a prefabricated transfer layer. Background Technology

[0002] Among the many types of prefabricated building components, sandwich shear walls are a typical example. Because they integrate structural load-bearing and external insulation systems, they offer advantages over ordinary cast-in-place structures, such as faster construction and energy savings, and are now widely used in the domestic prefabricated structure field.

[0003] In prefabricated structures, the transition layer between the bottom cast-in-place reinforced zone and the precast components is also known as the transfer layer. Precast shear walls mainly achieve the force transfer between the upper and lower layers of reinforcement through sleeve grouting. Therefore, the construction quality of sleeve grouting is particularly important. If the connecting cavity at the root of the transfer layer of the sandwich wall panel is not sealed tightly, it will directly affect the fullness of the sleeve grouting and the vertical force transfer between the upper and lower walls.

[0004] The traditional construction method of placing rubber and plastic strips on the outside of the cast-in-place wall in the transfer layer (the rubber and plastic strips are set in the grouting area, that is, the contact and coverage area between the precast component and the cast wall) is prone to problems such as grout leakage and runoff because the rubber and plastic strips are in direct hard contact with the bottom concrete of the inner leaf slab of the upper precast exterior wall. At the same time, the rubber and plastic strips are pre-set on the cast-in-place wall, and are easily damaged during the hoisting and adjustment of the precast component, resulting in poor sealing effect. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a prefabricated grouting and sealing structure for the connecting cavity of the exterior wall of the transition layer, so as to solve the problem in the prior art that the sealing strip is placed in the contact and coverage area of ​​the cast wall and the prefabricated component, resulting in poor sealing effect on the connecting cavity of the exterior wall of the transition layer.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention discloses a prefabricated exterior wall cavity grouting and sealing structure for a conversion layer, comprising a right-angle mounting bracket. Each end of the right-angle mounting bracket has a baffle. A first slider is provided on one surface of the right-angle mounting bracket, and a sliding groove is provided on the first slider. A second slider is provided within the sliding groove. The first and second sliders are perpendicularly arranged, and the height of the first and second sliders is less than the height of the baffle. Right-angle sealing strips are provided on both sides of the first slider, covering the sliding groove. A first pushing mechanism and a second pushing mechanism are respectively provided on the second baffle, which are used to control the displacement of the first and second sliders towards the right-angle mounting bracket in the right-angle direction.

[0008] Furthermore, each of the baffles on both sides is provided with a first through groove and a second through groove. The first through groove and the second through groove are respectively located at the edges of two mutually perpendicular surfaces of the right-angle mounting bracket. The first pushing mechanism and the second pushing mechanism are respectively disposed in the first through groove and the second through groove. The first pushing mechanism includes a first push plate and a first connecting post. The second pushing mechanism includes a second push plate and a second connecting post. The two ends of the first push plate and the second push plate pass through the first through groove and the second through groove respectively and are located on the outside of the right-angle mounting bracket. The two ends of the first connecting post are respectively connected to the first push plate and the first slider. The two ends of the second connecting post are respectively connected to the second push plate and the second slider. The portions of the first push plate and the second push plate located on the outside of the right-angle mounting bracket are provided with a pushing locking mechanism. The pushing locking mechanism is used to push the first push plate and the second push plate to move in the first through groove and the second through groove. The width of the first through groove matches the width of the first push plate, and the width of the second through groove is greater than the width of the second push plate.

[0009] Furthermore, the push locking mechanism includes a straight connecting rod and an arc-shaped connecting rod. One end of the straight connecting rod is hinged to the first push plate or the second push plate, and the other end of the straight connecting rod is hinged to the middle of the arc-shaped connecting rod. One end of the arc-shaped connecting rod is hinged to the baffle plate, and a push rod is provided on the other end of the arc-shaped connecting rod.

[0010] Furthermore, both the first connecting post and the second connecting post are provided with threads, and the first connecting post and the second connecting post are respectively threadedly connected to the first push plate and the second push plate, and the ends of the first connecting post and the second connecting post are respectively rotatably connected to the first slider and the second slider.

[0011] Furthermore, a limiting plate is provided above the first slider, and both ends of the limiting plate are fixed to the baffle, and the limiting plate is flush with the baffle.

[0012] Furthermore, each of the first push plate between adjacent first connecting columns and the second push plate between adjacent second connecting columns is provided with at least one threaded hole.

[0013] Furthermore, the right-angle sealing strip is bonded to the two right-angled surfaces of the first slider that are perpendicular to each other.

[0014] The beneficial effects of this invention are as follows:

[0015] In the above technical solution, by first hoisting the precast components, then installing the right-angle mounting bracket, and finally bringing the right-angle sealing strip into contact with the bottom cast-in-place area and the insulation layer, the problem of the right-angle sealing strip being damaged by contact with the moving precast components during installation is avoided. Furthermore, even if the right-angle mounting bracket is installed first, hoisting the precast components will not cause damage due to squeezing and friction between the precast components and the right-angle sealing strip caused by adjusting the hoisting position of the precast components, because the right-angle sealing strip is located between the baffles and its initial position will not be in contact with the precast components. Simultaneously, the right-angle sealing strip makes contact with the sealing layer for sealing, and this method does not occupy the grouting area of ​​the concrete between the bottom cast-in-place area and the precast components, thereby improving the support effect on the precast components.

[0016] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0018] Figure 1 This is a schematic diagram of the grouting and sealing structure installed at the connecting cavity in this invention;

[0019] Figure 2 This is a three-dimensional schematic diagram of the grouting and sealing structure in this invention;

[0020] Figure 3 This is a three-dimensional schematic diagram of the grouting and sealing structure in this invention from another perspective;

[0021] Figure 4 This is an exploded view of the grouting and sealing structure in this invention;

[0022] Figure 5 For the present invention Figure 1 A magnified view of a portion of point A in the middle;

[0023] Figure 6 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B.

[0024] The following labels are shown in the attached diagram:

[0025] Bottom cast-in-place area 1, floor slab 2, precast components 3, insulation layer 4, grouting and sealing structure 5, right-angle mounting bracket 510, baffle 511, first through groove 512, second through groove 513, first push plate 514, first connecting column 515, first slider 516, slide groove 517, limiting plate 518, right-angle sealing strip 519, second push plate 520, second connecting column 521, second slider 522, connecting block 523, straight connecting rod 524, arc-shaped connecting rod 525, push rod 526. Detailed Implementation

[0026] like Figures 1-6 As shown, this invention discloses a grouting and sealing structure 5 for the connecting cavity of an exterior wall in a prefabricated conversion layer. The grouting and sealing structure 5 in this technical solution is used to seal the connecting cavity at the junction of the bottom cast-in-place area 1 and the precast component 3. Specifically, it includes a right-angle mounting bracket 510, with baffles 511 at both ends along its length. One baffle 511 on one side of the right-angle mounting bracket 510 contacts the outer surface of the bottom cast-in-place area 1, and the other baffle 511 on the other side contacts the insulation layer 4 on the outer surface of the precast component 3. A first slider 516 is provided on one surface of the right-angle mounting bracket 510 (the side facing the insulation layer 4), and a sliding groove 517 is provided on the first slider 516. The sliding groove 517 is located along the length of the first slider 516. In the angular direction, the length of the sliding groove 517 matches the length of the insulation layer 4. A second slider 522 is provided in the sliding groove 517. The first slider 516 and the second slider 522 are set perpendicularly. The height of the first slider 516 and the second slider 522 is less than the height of the baffle 511. Right-angle sealing strips 519 (rubber and plastic strips) are provided on both sides of the first slider 516. The right-angle sealing strips 519 cover the sliding groove 517 and are glued to the two right-angle surfaces of the first slider 516. The second baffle 511 is provided with a first pushing mechanism and a second pushing mechanism. The first pushing mechanism and the second pushing mechanism are used to control the displacement of the first slider 516 and the second slider 522 toward the right-angle mounting bracket 510 in the right-angle direction.

[0027] The working principle of the above technical solution is as follows:

[0028] First, the precast component 3 is hoisted onto the bottom cast-in-place area 1, with the edge of the precast component 3 coinciding with the edge of the bottom cast-in-place area 1. At this point, the insulation layer 4 is completely located on the outside of the bottom cast-in-place area 1. Then, the right-angle mounting bracket 510 is fixed to the surface of the bottom cast-in-place area 1 using anchor bolts or other means. By moving and adjusting, the baffle 511 is brought into contact with the surface of the bottom cast-in-place area 1 and the lower surface of the insulation layer 4, respectively. After the right-angle mounting bracket 510 is fixed, the first pushing mechanism is manually operated to move the first slider 516 toward the surface of the bottom cast-in-place area 1, so that the right-angle mounting bracket 510 is fixed. One surface of the corner sealing strip 519 is in close contact with the surface of the bottom cast-in-place area 1. Then, by operating the second pushing mechanism, the second slider 522 moves toward the insulation layer 4, making the other surface of the right-angle sealing strip 519 in close contact with the bottom surface of the insulation layer 4, thus achieving the sealing of the gap in the connecting cavity. As a result, there will be no leakage of grout during subsequent grouting operations. It is easy to understand that the remaining edges of the connecting cavity will be sealed by the floor slab 2, etc., or sealed in advance by the construction personnel (for details, refer to the sleeve grouting operation in the prior art).

[0029] In the above technical solution, by first hoisting the precast component 3, then installing the right-angle mounting bracket 510, and finally bringing the right-angle sealing strip 519 into contact with the bottom cast-in-place area 1 and the insulation layer 4, the problem of the right-angle sealing strip 519 being damaged by contact with the moving precast component 3 during installation is avoided. Furthermore, even if the right-angle mounting bracket 510 is installed first, hoisting the precast component 3 will not cause damage due to squeezing and friction between the precast component 3 and the right-angle sealing strip 519 caused by adjusting the hoisting position of the precast component 3, because the right-angle sealing strip 519 is located between the baffles 511 and its initial position does not contact the precast component 3. Simultaneously, the right-angle sealing strip 519 contacts and seals the sealing layer. This method does not occupy the grouting area of ​​the concrete between the bottom cast-in-place area 1 and the precast component 3, thereby improving the support effect on the precast component 3.

[0030] Simultaneously, this arrangement of the first slider 516 and the second slider 522 allows them to abut against the two surfaces of the right-angle sealing strip 519, thereby sealing the "7-shaped" connecting cavity formed between the bottom cast-in-place area 1 and the precast component 3. The structure is ingeniously designed. Furthermore, the compression action of the first slider 516 and the second slider 522 controls the contact pressure between the two surfaces of the right-angle sealing strip 519 and the bottom cast-in-place area 1 and the insulation layer 4. One contact is between the insulation layer 4 and the right-angle sealing strip 519, which is a soft seal, resulting in a relatively good seal even under lower pressure. Excessive compression could damage the insulation layer 4. The other contact is between the wall surface and the right-angle sealing strip 519, which is a hard seal, requiring a larger contact area to achieve a better seal.

[0031] In one feasible embodiment, each of the baffles 511 on both sides is provided with a first through groove 512 (baffle 511 in contact with the insulation layer 4) and a second through groove 513 (baffle 511 in contact with the surface of the bottom cast-in-place area 1). The first through groove 512 and the second through groove 513 are respectively located at the two mutually perpendicular edges of the right-angle mounting bracket 510. A first pushing mechanism and a second pushing mechanism are respectively disposed in the first through groove 512 and the second through groove 513. The first pushing mechanism includes a first push plate and a first connecting column 515, and the second pushing mechanism includes a second push plate and a second connecting column 521. The first push plate and the second push plate are respectively disposed in the first through groove 512 and the second through groove 513. The ends pass through the first through slot 512 and the second through slot 513 respectively, and are located on the outside of the right-angle mounting bracket 510. The two ends of the first connecting post 515 are connected to the first push plate and the first slider 516 respectively. The two ends of the second connecting post 521 are connected to the second push plate and the second slider 522 respectively. The first push plate and the second push plate are both provided with a push locking mechanism on the part of the right-angle mounting bracket 510 located on the outside of the right-angle mounting bracket 510. The push locking mechanism is used to push the first push plate and the second push plate to move in the first through slot 512 and the second through slot 513. The width of the first through slot 512 matches the width of the first push plate, and the width of the second through slot 513 is greater than the width of the second push plate.

[0032] It should be noted that by pushing the first push plate 514 or the second push plate 520 to move, and then through the force transmission of the first connecting column 515 and the second connecting column 521, the first slider 516 and the second slider 522 can be driven to move. The lengths of the first connecting column 515 and the second connecting column 521 can be set according to the actual situation, so as to minimize the interference between the operation of the push locking mechanism and the bottom cast-in-place area 1 or the insulation layer 4. Because when the first push plate 514 drives the first slider 516 to move, since the second slider 522 is located inside the first slider 516, the second slider 522 should also move together. Therefore, the width of the second through groove 513 is greater than the width of the second push plate 520, the purpose of which is to avoid movement interference.

[0033] like Figure 6As shown, in one implementable embodiment, the locking mechanism includes a straight connecting rod 524 and an arc-shaped connecting rod 525. One end of the straight connecting rod 524 is hinged to a first push plate or a second push plate, and connected via a connecting block 523 and a pivot on the connecting block 523. The other end of the straight connecting rod 524 is hinged to the middle of the arc-shaped connecting rod 525. One end of the arc-shaped connecting rod 525 is hinged to a baffle 511, and a push rod 526 is provided on the other end of the arc-shaped connecting rod 525. It is easy to understand that by pushing the push rod 526, the straight connecting rod 524 and the arc-shaped connecting rod 525 can be rotated. At the same time, the right-angle connecting rod pushes the first push plate to move. When the straight connecting rod 524... When the lower part of the straight push rod 526 and the arc-shaped connecting rod 525 are in a straight line, the structure can automatically lock. To cancel the locking later, simply push the push rod 526 in the opposite direction. This locking method is simple and can be set according to the connection angle and position of the straight push rod 526 and the arc-shaped push rod 526, thereby controlling the amount of movement displacement of the first push plate (which can be set according to the compression of the right-angle sealing strip 519). This makes the pressure applied in each operation constant and the operation simpler (because excessive pressure will damage the insulation layer 4. As for how much pressure to apply, it can be obtained through a limited number of experiments, which will not be elaborated on here).

[0034] In one feasible embodiment, both the first connecting post 515 and the second connecting post 521 are threaded, and the first connecting post 515 and the second connecting post 521 are threadedly connected to the first push plate 514 and the second push plate 520, respectively. The ends of the first connecting post 515 and the second connecting post 521 are rotatably connected to the first slider 516 and the second slider 522, respectively. The first connecting post 515 and the second connecting post 521 are threadedly connected to the first push plate 514 and the second push plate 520, respectively. Therefore, during the grouting process, greater pressure can be applied to the area of ​​localized grout leakage by rotating either the first connecting post 515 or the second connecting post 521 individually, thus mitigating grout leakage during the grouting process. As a remedial measure, since the surface of the bottom cast-in-place area 1 or the insulation layer 4 may be uneven, the contact effect between the recessed part and the right-angle sealing strip 519 will be poor, resulting in grout leakage. In this case, the right-angle sealing strip 519 in the grout leakage area can be subjected to greater pressure by rotating the first connecting column 515 and the second connecting column 521. It is easy to understand that the rigidity of the first pushing plate 514 and the second pushing plate 520 must be large enough to prevent bending during the pressure application process, while the rigidity of the first slider 516 and the second slider 522 can be relatively small. When the increased pressure is applied, local bending occurs, which is more beneficial to local sealing. As for the material selection, it is existing technology and will not be elaborated on here.

[0035] In one feasible embodiment, a limiting plate 518 is provided above the first slider 516. Both ends of the limiting plate 518 are fixed to the baffle 511, and the limiting plate 518 is flush with the baffle 511. The setting of the limiting plate 518 can limit the flipping of the first slider 516, so as to avoid the first slider 516 having too much freedom during the transfer process, which would lead to the problem of not being able to store it. At the same time, it can also guide the movement of the slider.

[0036] In one feasible embodiment, at least one threaded hole is provided on the first push plate 514 between adjacent first connecting columns 515 and the second push plate 520 between adjacent second connecting columns 521. The threaded hole can further pressurize and seal the local grout leakage by adding threaded first connecting columns 515 and second connecting columns 521 later.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A prefabricated transfer layer exterior wall connecting cavity grouting and sealing structure, characterized in that, The prefabricated conversion layer exterior wall connecting cavity grouting and sealing structure is used to seal the connecting cavity at the junction of the bottom cast-in-place area and the precast component. It includes a right-angle mounting frame with baffles at both ends along its length. One baffle on one side of the right-angle mounting frame contacts the outer surface of the bottom cast-in-place area, and the other baffle contacts the insulation layer on the outer surface of the precast component. A first slider is provided on the side of the right-angle mounting frame facing the insulation layer. The first slider has a sliding groove, which is located along the length of the first slider and matches the length of the insulation layer. A second slider is provided in the sliding groove. The first and second sliders are perpendicular to each other, and their heights are less than the height of the baffles. Right-angle sealing strips are provided on both sides of the first slider, covering the sliding groove. The right-angle sealing strips are glued to the two perpendicular right-angle surfaces of the first slider. The baffles are provided with a first pushing mechanism and a second pushing mechanism, which are used to control the displacement of the first and second sliders in the right-angle direction toward the right-angle mounting frame. Each of the baffles on both sides is provided with a first through groove and a second through groove. The first through groove and the second through groove are located at the edges of two mutually perpendicular surfaces of the right-angle mounting bracket. The first pushing mechanism and the second pushing mechanism are respectively disposed in the first through groove and the second through groove. The first pushing mechanism includes a first push plate and a first connecting post. The second pushing mechanism includes a second push plate and a second connecting post. The two ends of the first push plate and the second push plate pass through the first through groove and the second through groove, respectively, and are located on the outside of the right-angle mounting bracket. The two ends of the first connecting post are respectively connected to the first push plate and the first slider. The two ends of the second connecting post are respectively connected to the second push plate and the second slider. The portions of the first push plate and the second push plate located on the outside of the right-angle mounting bracket are provided with a pushing locking mechanism. The pushing locking mechanism is used to push the first push plate and the second push plate to move within the first through groove and the second through groove. The width of the first through groove matches the width of the first push plate, and the width of the second through groove is greater than the width of the second push plate.

2. The prefabricated transfer layer exterior wall connecting cavity grouting and sealing structure according to claim 1, characterized in that: The push-locking mechanism includes a straight connecting rod and an arc-shaped connecting rod. One end of the straight connecting rod is hinged to a first push plate or a second push plate, and the other end of the straight connecting rod is hinged to the middle of the arc-shaped connecting rod. One end of the arc-shaped connecting rod is hinged to a baffle plate, and a push rod is provided on the other end of the arc-shaped connecting rod.

3. The prefabricated transfer layer exterior wall connecting cavity grouting and sealing structure according to claim 1, characterized in that: Both the first connecting post and the second connecting post are threaded, and the first connecting post and the second connecting post are threadedly connected to the first push plate and the second push plate, respectively. The ends of the first connecting post and the second connecting post are rotatably connected to the first slider and the second slider, respectively.

4. The prefabricated transfer layer exterior wall connecting cavity grouting and sealing structure according to claim 1, characterized in that: A limiting plate is provided above the first slider. Both ends of the limiting plate are fixed to the baffle, and the limiting plate is flush with the baffle.

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