Precast lining structure for concrete floors

Abstract

The utility model discloses a prefabricated bush structure of concrete floor slab relates to building construction technical field, wherein, prefabricated bush structure of concrete floor slab includes bush piece and sealing plate spare. Wherein, bush piece setting is the prefabricated part, is used for integrative forming in concrete floor slab, bush piece inside and outside two sides form respectively and the water retaining part of through cavity, the water retaining part is protruding in the outer peripheral wall of bush piece setting, to form the horizontal plane of blocking. Sealing plate spare is installed in through cavity, to be used for the sealing of through cavity, the technical scheme of the utility model, through the water stop part of pre -buried and through the mortise and tenon structure and optimization configuration design of screw structure, realize the one -off forming precision reservation of floor slab temporary reservation hole, fast plugging and permanent anti -leakage, have good application prospect.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a precast bushing structure for concrete floor slabs. Background Technology

[0002] In the construction of cast-in-place concrete floor slabs, temporary openings are often required for equipment pipelines or construction access. Traditional methods use wooden formwork or steel plates for temporary formwork to create these openings, which have the following drawbacks: leakage is likely to occur after sealing the openings due to poor bonding between the old and new concrete; the opening edges lack effective waterproofing, resulting in poor waterproofing performance; and secondary cutting and trimming are required after formwork removal, leading to low construction efficiency and potential structural damage. Furthermore, while existing construction methods may employ pre-embedded steel pipes or PVC sleeves, these methods offer limited waterproofing and are prone to shrinkage cracks after sealing. Therefore, this invention provides a prefabricated bushing structure for concrete floor slabs that not only ensures waterproof sealing at the reserved openings but also effectively facilitates construction. Utility Model Content

[0003] The main purpose of this utility model is to propose a prefabricated bushing structure for concrete floor slabs, which aims to solve the problems of poor waterproof sealing at temporary reserved openings in traditional floor slabs and inconvenient construction.

[0004] To achieve the above objectives, the present invention proposes a precast bushing structure for concrete floor slabs, comprising: A precast lining assembly, integrally formed into the concrete floor slab, has a guide cavity and a water-blocking portion formed on its inner and outer sides, respectively. The water-blocking portion protrudes from the outer peripheral wall of the lining assembly to form a water-blocking surface; and... A sealing plate is installed in the conductive cavity to seal the conductive cavity.

[0005] In one embodiment, a connection structure is provided between the sealing plate and the liner kit for detachable installation of the sealing plate onto the liner kit.

[0006] In one embodiment, the connection structure includes: An internally threaded sleeve is provided on the inner wall surface of the conductive cavity; and, An external threaded sleeve, corresponding to the internal threaded sleeve, is installed on the outer peripheral wall of the sealing plate.

[0007] In one embodiment, the internal threaded sleeve and the bushing are integrally formed; and / or, The external threaded sleeve and the sealing plate are integrally formed.

[0008] In one embodiment, at least one of the two planar ends of the sealing plate is provided with a screw-in portion recessed inward thereto for connecting an external disassembly device; The internal threaded sleeve and / or the external threaded sleeve are made of stainless steel.

[0009] In one embodiment, both the liner and the sealing plate include a reinforcing mesh structure and a concrete layer, wherein the reinforcing mesh structure is formed within the concrete layer; Furthermore, one end of the water-blocking part is located within the concrete layer of the lining and is connected to the reinforcing mesh structure of the lining.

[0010] In one embodiment, a connecting structure is provided between the sealing plate and the bushing, the connecting structure including an internal threaded sleeve and an external threaded sleeve, the internal threaded sleeve being disposed on the inner wall surface of the guide cavity, and the external threaded sleeve corresponding to the internal threaded sleeve and installed on the outer peripheral wall of the sealing plate; The outer wall surface of the internal threaded sleeve and / or the inner wall surface of the external threaded sleeve are roughened to increase the contact area with the concrete structure.

[0011] In one embodiment, the precast bushing structure of the concrete floor slab includes a mating state and a disassembled state; In the mating state, the sealing plate is at least partially installed in the conductive cavity; in the disassembly state, the sealing plate and the conductive cavity are separated.

[0012] In one embodiment, in the mating state, the two ends of the sealing plate and the two ends of the liner are flush, and two recessed portions are formed between the two ends of the sealing plate and the two ends of the liner; The precast bushing structure of the concrete floor slab also includes a filling structure, which fills the two recessed sections to enhance the sealing performance of the sealing plate and the bushing.

[0013] In one embodiment, the two ends of the bushing are a near-water end and a far-water end; The filling structure includes a waterproof filler and an expanding filler. The waterproof filler is filled in the settling tank located at the near-water end, and the expanding filler is filled in the settling tank located at the far-water end.

[0014] This invention achieves precise, rapid sealing, and permanent leak-proofing of temporary openings in floor slabs through pre-embedded water-stop components, mortise and tenon structures formed by threaded connections, and optimized structural design. Specifically, the opening sealing utilizes prefabricated components, eliminating the need for formwork and reducing material and labor usage. Lining kits and sealing plates are factory-produced with high dimensional accuracy, minimizing on-site cutting. Threaded connections enable rapid installation, positioning, and removal, improving construction efficiency. In practical applications, this invention effectively enhances the waterproofing and sealing effect of temporary openings and simplifies the construction process, demonstrating promising application prospects. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the vertical structure of an embodiment of the precast bushing structure for concrete floor slabs provided by this utility model; Figure 2 for Figure 1 Top view of the lining assembly; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 for Figure 1 Top view of the center sealing panel; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at point BB; Figure 6 for Figure 1 A side view of the structure of the center sealing panel.

[0017] Explanation of icon numbers: 100. Precast bushing structure for concrete floor slabs; 1. Bushing assembly; 11. Water-blocking part; 12. Internal threaded sleeve; 15. Conducting cavity; 2. Sealing plate; 21. External threaded sleeve; 22. Screw joint; 3. Reinforcing mesh structure; 4. Concrete layer; 5. Settling groove; 6. Filling structure; 61. Waterproof filler; 62. Expansion filler.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] In the construction of cast-in-place concrete floor slabs, temporary openings are often required for equipment pipelines or construction access. Traditional methods use wooden formwork or steel plates for temporary formwork to create these openings, which have the following drawbacks: leakage is likely due to poor bonding between the old and new concrete when the openings are sealed later; the opening edges lack effective waterproofing, resulting in poor waterproofing performance; and secondary cutting and trimming are required after demolding, leading to low construction efficiency and potential structural damage. Furthermore, while some existing construction methods use embedded steel pipes or PVC sleeves, these methods have limited waterproofing effectiveness and are prone to shrinkage cracks after sealing. Therefore, this invention provides a prefabricated bushing structure 100 for concrete floor slabs, which not only ensures waterproof sealing at the reserved openings but also effectively facilitates construction.

[0023] This utility model proposes a precast bushing structure 100 for concrete floor slabs to solve the above problems.

[0024] Please see Figure 1 , Figure 2 and Figure 4In one embodiment of this utility model, the prefabricated bushing structure 100 of the concrete floor slab includes a bushing assembly 1 and a sealing plate 2. The bushing assembly 1 is a prefabricated component, integrally formed into the concrete floor slab. The bushing assembly 1 has a guiding cavity 15 and a water-blocking portion 11 formed on its inner and outer sides, respectively. The water-blocking portion 11 protrudes from the outer peripheral wall of the bushing assembly 1 to form a water-blocking surface. The sealing plate 2 is installed in the guiding cavity 15 to seal the guiding cavity 15.

[0025] In this embodiment, the lining kit 1 is a prefabricated structure. In actual use, the lining kit 1 is installed during the formwork installation of the floor slab. Specifically, before pouring the floor slab, the reinforcing steel structure needs to be pre-tied. During the tying of the reinforcing steel structure, the lining kit 1 can be tied together with the reinforcing steel structure using steel wire. During the tying process, the direction of the lining kit 1 can be adjusted to make it perpendicular to the floor slab surface, and during the erection of the formwork, the formwork should avoid the ends of the lining kit 1. After the lining kit 1 is tied and fixed, the floor slab can be poured. The lining kit 1 is directly formed into the floor slab structure using mortar. The through cavity 15 in the lining kit 1 can form a reserved channel for equipment wiring or construction access. Because the lining kit 1 is a prefabricated component, its inner wall structure can be pre-treated during the production process. In actual use, it can be directly installed in the above manner. Therefore, the reserved channel does not require secondary modification of its inner wall structure, greatly improving the convenience of construction. Furthermore, the lining kit 1 and the steel reinforcement structure in the floor slab are tied together, and the integral floor slab structure formed by the casting significantly improves the connection performance between the lining kit 1 and the floor slab, which is reflected in the fact that the lining kit 1 and the floor slab structure are less prone to cracking.

[0026] Furthermore, to further ensure the airtightness between the lining kit 1 and the floor slab structure and prevent water leakage at their connection, a water-blocking portion 11 is formed on the outer peripheral wall of the lining kit 1. This water-blocking portion 11 extends outwards away from the lining kit 1 to form a ring-shaped baffle structure. During actual pouring, the water-blocking portion 11 is poured inside the concrete, effectively blocking water from entering between the lining kit 1 and the floor slab. This further ensures the sealing connection performance between the lining kit 1 and the floor slab.

[0027] Additionally, when the conductive cavity 15 formed on the bushing 1 is not in use, the sealing plate 2 can be installed in the conductive cavity 15. For example... Figure 1As shown, the sealing plate 2 can seal the inner channel of the lining kit 1. In actual construction, the sealing plate 2 is also a prefabricated structure. Therefore, the sealing plate 2 can be used directly when sealing the lining kit 1. Furthermore, since both the lining kit 1 and the sealing plate 2 are prefabricated structures, their structural design ensures a tight connection between the two structures during production. Therefore, after the lining kit 1 and the sealing plate 2 are sealed together, the problem of leakage between the old and new concrete, which occurs when traditional concrete sealing is used, is effectively avoided.

[0028] Therefore, in the above embodiments, the use of prefabricated components avoids the need for on-site overlapping of hole templates, making the actual construction process more convenient. Traditionally, pre-embedded steel pipes or PVC sleeves are used to form the aforementioned guiding cavity 15, but these structures have limited water-stopping effects and are prone to shrinkage cracks after sealing. In the above embodiments, both the lining component 1 and the sealing plate 2 are prefabricated structures, effectively ensuring the precision of their fit and guaranteeing the sealing performance of the guiding cavity 15 after sealing. Furthermore, the lining component 1 connects to the steel reinforcement structure of the floor slab, resulting in better connection performance. Therefore, compared to traditional reserved channel structures and construction methods, the above structure achieves better connection performance and sealing.

[0029] In actual use, the liner kit 1 can be fitted with the sealing plate 2 before the equipment pipeline is installed, or when the entire through cavity 15 is no longer in use. When the through cavity 15 needs to be used, the sealing plate 2 and the liner kit 1 need to be separated. Therefore, to improve the ease of use of the liner kit 1, in this embodiment, a connection structure is provided between the liner kit 1 and the sealing plate 2, thereby enabling the sealing plate 2 to be detachably installed on the liner kit 1.

[0030] Specifically, Figure 1 , Figure 3 and Figure 5 As shown, the connection structure includes an internal threaded sleeve 12 and an external threaded sleeve 21. The internal threaded sleeve 12 is disposed on the inner wall surface of the guiding cavity 15, and the external threaded sleeve 21 corresponds to the internal threaded sleeve 12 and is installed on the outer peripheral wall of the sealing plate 2. In this embodiment, the connection structure is configured as a threaded mating structure. A threaded mating structure is chosen because the contact surface of the threaded connection structure is relatively large, which also helps to improve the sealing connection performance of the bushing 1 and the sealing plate 2.

[0031] It should be noted that, in the above embodiments, both the internal threaded sleeve 12 and the external threaded sleeve 21 are preferably made of stainless steel. Metal is used because the threaded structure on a metal structural component can be formed by turning. This machining method results in a threaded structure with sufficiently low friction between the two mating threaded structures. Therefore, during actual operation, a small force can be applied to cause the sealing plate 2 and the bushing 1 to separate or mate.

[0032] Meanwhile, considering that when the sealing plate 2 is installed inside the bushing 1, rotating the sealing plate 2 is difficult, therefore in this embodiment, as... Figure 4 and Figure 5 As shown, at least one of the two planar ends of the sealing plate 2 is provided with a screw-in portion 22 recessed inward for connecting an external disassembly device. When actually installing or removing the sealing plate 2, the external disassembly structure can be connected to the screw-in portion 22. Force is applied through the external disassembly structure to better rotate the sealing plate 2 on the bushing 1. This is similar to the use of an inside wrench and a countersunk hole structure in everyday life, where the force applied by the inside wrench is used to rotate the corresponding bolt structure, etc. Therefore, in this embodiment, the screw-in portion 22 and the disassembly structure seat are not specifically limited.

[0033] It is conceivable that the connection structure is not limited to the threaded connection structure described above. In specific application scenarios, the threaded connection structure can also be replaced by a snap-fit ​​structure or a bolt fixing structure. In the application scenario of this solution, specific requirements for waterproof sealing and convenient assembly / disassembly are involved, so a threaded connection structure is preferred.

[0034] It should be noted that the internal threaded sleeve 12 and the external threaded sleeve 21 are respectively the mounting and mating structures on the bushing 1 and the sealing plate 2. Therefore, when forming the precast component, the internal threaded sleeve 12 and the bushing 1 are integrally formed, and preferably, the external threaded sleeve 21 and the sealing plate 2 are also integrally formed. For example, when both the bushing 1 and the sealing plate 2 are concrete structural components, when preparing the precast components of the bushing 1 and the sealing plate 2, the aforementioned threaded structure and the concrete structure can be integrally formed, thereby effectively increasing the connection performance between the threaded sleeve structure and the corresponding structural component, which helps to improve the integrity and sealing performance of the precast component.

[0035] Specifically, such as Figure 3 and Figure 5As shown, in one embodiment of this utility model, both the lining kit 1 and the sealing plate 2 are configured as precast concrete structures. Specifically, both the lining kit 1 and the sealing plate 2 include a reinforcing mesh structure 3 and a concrete layer 4, with the reinforcing mesh structure 3 formed within the concrete layer 4. To ensure the overall strength of the precast lining kit 1 and the precast sealing plate 2, the concrete structures of the lining kit 1 and the sealing plate 2 are provided with a reinforcing mesh structure 3. The reinforcing mesh structure 3 includes multiple circular reinforcing meshes and connecting reinforcing bars, which are interconnected. During the precast component preparation process, the external threaded sleeve 21 and the internal threaded sleeve 12, along with the corresponding reinforcing mesh structure 3, can be cast separately to form the corresponding precast concrete component.

[0036] Among them, such as Figure 2 and Figure 6 As shown, in order to further increase the connection performance between the external threaded sleeve 21 and the internal threaded sleeve 12 and the concrete structure, it is preferable to set the outer wall surface of the internal threaded sleeve 12 and / or the inner wall surface of the external threaded sleeve 21 as rough surfaces to increase the contact area with the concrete structure, thereby improving the connection performance between the threaded structure and the corresponding structure.

[0037] A water-blocking portion 11 is formed on the liner 1, and the water-blocking portion 11 is configured as a plate-like structure as described above. In the actual prefabrication of the liner 1, in order to ensure the connection strength between the water-blocking portion 11 and the concrete structure, one end of the water-blocking portion 11 needs to be placed inside the concrete layer 4 of the liner 1 and connected to the reinforcing mesh structure 3 of the liner 1 during actual production.

[0038] When the precast bushing structure 100 of the concrete floor slab is used, it includes a mating state and a disengaged state; wherein, corresponding to the mating state, the sealing plate 2 is at least partially installed in the guide cavity 15; corresponding to the disengaged state, the sealing plate 2 and the guide cavity 15 are separated.

[0039] Specifically, in order to improve the aesthetics of the horizontal plate and the liner 1 after installation, in the mating state, the two ends of the sealing plate 2 and the two ends of the liner 1 are flush.

[0040] After the entire floor slab structure is completed, the through cavity 15 needs to be sealed using the sealing plate 2 to ensure the sealing performance at the location of the bushing 1. However, when the sealing plate 2 and the bushing 1 are actually connected by a threaded structure, a structural gap is formed at the end of the threaded structure. To further ensure the sealing performance between the sealing plate 2 and the bushing 1, in the mating state, two recessed sections 5 are formed between the two ends of the sealing plate 2 and the two ends of the bushing 1; for example... Figure 1 As shown, the precast bushing structure 100 of the concrete floor slab also includes a filling structure 6, which fills the two recessed sections 5 to enhance the sealing performance of the sealing plate 2 and the bushing 1. The filling structure 6, filling the recessed sections 5, seals the connection gap between the sealing plate 2 and the bushing 1, further improving the sealing performance between them.

[0041] Considering the specific usage scenario, the upward-facing end of the floor slab is the end structure that primarily contacts the water. Therefore, the upward-facing end of the lining kit 1 needs to prioritize waterproofing, while the downward-facing end of the lining kit 1, located on the top surface of the lower structure, primarily considers aesthetics. To meet these requirements, in one embodiment of this utility model, the two ends of the lining kit 1 are a near-water end and a far-water end; the filling structure 6 includes a waterproof filler 61 and an expanding filler 62. The waterproof filler 61 fills the settling tank 5 located at the near-water end, and the expanding filler 62 fills the settling tank 5 located at the far-water end.

[0042] In the above embodiments, the waterproof filler 61 can specifically be set as flexible waterproof sealant. After the sealing plate 2 is installed on the lining kit 1, the flexible waterproof sealant is filled into the sinkhole 5 at the water inlet end, thereby sealing the upward end where the sealing plate 2 and the lining kit 1 meet. The expanding filler 62 can specifically be set as expanding mortar. After the sealing plate 2 is installed on the lining kit 1, the expanding mortar is filled into the sinkhole 5 at the water outlet end. In actual use, the filling amount of the expanding mortar can be controlled according to the actual situation, so that the expanding mortar can compensate for the height difference between the ends of the sealing plate 2 and the lining kit 1, thereby improving the aesthetics of the downward end of the precast lining structure 100 of the entire concrete floor slab.

[0043] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A precast bushing structure for a concrete floor slab, characterized in that, include: The lining kit is a prefabricated component for integral molding into the concrete floor slab. The inner and outer sides of the lining kit are respectively formed with a guide cavity and a water-blocking part. The water-blocking part protrudes from the outer peripheral wall of the lining kit to form a water-blocking surface. as well as, A sealing plate is installed in the conductive cavity to seal the conductive cavity.

2. The precast bushing structure for concrete floor slabs as described in claim 1, characterized in that, A connection structure is provided between the sealing plate and the liner kit for the detachable installation of the sealing plate on the liner kit.

3. The precast bushing structure for concrete floor slabs as described in claim 2, characterized in that, The connection structure includes: An internally threaded sleeve is provided on the inner wall surface of the conductive cavity; and, An external threaded sleeve, corresponding to the internal threaded sleeve, is installed on the outer peripheral wall of the sealing plate.

4. The precast bushing structure for concrete floor slabs as described in claim 3, characterized in that, The internal threaded sleeve and the bushing are integrally formed; and / or, The external threaded sleeve and the sealing plate are integrally formed.

5. The precast bushing structure for concrete floor slabs as described in claim 3, characterized in that, At least one of the two planar ends of the sealing plate is provided with a screw-in portion recessed inward thereto for connecting an external disassembly device; The internal threaded sleeve and / or the external threaded sleeve are made of stainless steel.

6. The precast bushing structure for concrete floor slabs as described in claim 1, characterized in that, Both the lining assembly and the sealing plate include a reinforcing mesh structure and a concrete layer, wherein the reinforcing mesh structure is formed within the concrete layer; Furthermore, one end of the water-blocking part is located within the concrete layer of the lining and is connected to the reinforcing mesh structure of the lining.

7. The precast bushing structure for concrete floor slabs as described in claim 6, characterized in that, A connection structure is provided between the sealing plate and the bushing. The connection structure includes an internal threaded sleeve and an external threaded sleeve. The internal threaded sleeve is disposed on the inner wall surface of the guide cavity, and the external threaded sleeve corresponds to the internal threaded sleeve and is installed on the outer peripheral wall of the sealing plate. The outer wall surface of the internal threaded sleeve and / or the inner wall surface of the external threaded sleeve are roughened to increase the contact area with the concrete structure.

8. The precast bushing structure for concrete floor slabs as described in claim 1, characterized in that, The precast bushing structure of the concrete floor slab includes a mating state and a separated state; In the mating state, the sealing plate is at least partially installed in the conductive cavity; in the disassembly state, the sealing plate and the conductive cavity are separated.

9. The precast bushing structure for concrete floor slabs as described in claim 8, characterized in that, In the mating state, the two ends of the sealing plate and the two ends of the liner are flush, and two recessed sections are formed between the two ends of the sealing plate and the two ends of the liner. The precast bushing structure of the concrete floor slab also includes a filling structure, which fills the two recessed sections to enhance the sealing performance of the sealing plate and the bushing.

10. The precast bushing structure for concrete floor slabs as described in claim 9, characterized in that, The two ends of the bushing are the near-water end and the far-water end; The filling structure includes a waterproof filler and an expanding filler. The waterproof filler is filled in the settling tank located at the near-water end, and the expanding filler is filled in the settling tank located at the far-water end.

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