A pre-buried sleeve with screw holes
By using a combination of polyethylene pipe, fiberglass reinforcement layer and epoxy resin anti-corrosion layer in the pre-embedded sleeve, combined with snap-fit and threaded connection, the problem of poor connection stability of the pre-embedded sleeve is solved, and high strength and waterproof effect are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI SHUNTUO AUTO PARTS CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-07
AI Technical Summary
The existing pre-embedded sleeves have poor stability due to threaded connections, and are prone to breakage or water leakage, which affects their performance.
The core is made of polyethylene pipe, with an outer fiberglass braided reinforcement layer and an epoxy resin anti-corrosion layer. It combines snap-fit and threaded connections to enhance connection stability and is anchored to concrete by pre-embedded bars.
It improves the connection stability and protection performance of the sleeve, prevents breakage and water leakage, and extends its service life.
Smart Images

Figure CN224468580U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of embedded sleeve technology, specifically an embedded sleeve with screw holes. Background Technology
[0002] Pre-embedded sleeves with screw holes are metal or plastic pipe fittings that are pre-embedded in concrete structures such as walls, floors, beams, and columns. They have pre-drilled screw holes on their internal or external walls for later installation of fasteners such as pipes, cable supports, and equipment bases, thus avoiding direct drilling into the concrete surface and damaging the structure.
[0003] However, current pre-embedded sleeves are only connected by threads, resulting in poor stability of the threaded sleeves. Breakage or water leakage is prone to occur at the connection of the pre-embedded sleeves, which affects people's use of the pre-embedded sleeves. Therefore, those skilled in the art have provided a pre-embedded sleeve with screw holes to solve the problems mentioned in the background art. Utility Model Content
[0004] The purpose of this utility model is to provide a pre-embedded sleeve with screw holes to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An embedded sleeve with screw holes includes a pipe, a first connecting mechanism, and a second connecting mechanism. The pipe includes an anti-corrosion layer, a reinforcing layer, and a polyethylene pipe. The outer surface of the polyethylene pipe is connected to the reinforcing layer, and the outer surface of the reinforcing layer is connected to the anti-corrosion layer.
[0007] As a further improvement of this utility model: the anti-corrosion layer is made of epoxy resin, and the reinforcing layer is made of woven glass fiber.
[0008] As a further embodiment of this utility model: the first connecting mechanism includes a first connecting plate, the second connecting mechanism includes a second connecting plate, the inner wall of the first connecting plate is provided with a first mounting thread, and the inner wall of the second connecting plate is provided with a second mounting thread.
[0009] As a further embodiment of this utility model: the outer surfaces of the first connecting plate and the second connecting plate are both connected to the pipeline, and the outer surfaces of the first connecting plate and the second connecting plate are each equipped with a ring-shaped arrangement of mounting plates.
[0010] As a further improvement of this utility model: each of the mounting plates has a mounting hole on its outer surface, and each mounting hole has a mounting screw inside.
[0011] As a further improvement of this utility model: two sets of pre-embedded ribs are installed on the outer surface of the pipe, and a reinforcing plate is installed on the outer surface of the pipe.
[0012] As a further improvement of this utility model: a first card plate is installed on the front side of the first connecting plate, and a first card slot is opened on the front side of the second connecting plate.
[0013] As a further improvement of this utility model: a second slot is provided on the back of the second connecting plate, and a second card plate is installed on the back of the second connecting plate.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] The pre-embedded sleeve with screw holes engages with the first slot of the first connecting plate and the first slot of the second connecting plate. At the same time, the second slot of the second connecting plate engages with the second slot of another component. The first and second mounting threads are connected with screws to achieve rapid docking of multiple components. The mounting holes on the mounting plate are used with mounting screws to fix the sleeve in the building structure. The pre-embedded reinforcement is inserted into the concrete, and the reinforcing plate increases the contact area, so that the sleeve is tightly bonded to the concrete, ensuring the pre-embedding is stable and meeting the requirements for pipeline passage and structural protection. Attached Figure Description
[0016] Figure 1 A schematic diagram of a three-dimensional structure of a pre-embedded sleeve with screw holes;
[0017] Figure 2 A side view of a pre-embedded sleeve with screw holes;
[0018] Figure 3 A top view of a pre-embedded sleeve with screw holes;
[0019] Figure 4 A top view of a pre-embedded sleeve with screw holes;
[0020] Figure 5 This is a cross-sectional view of a pipe in a pre-embedded sleeve with screw holes.
[0021] In the diagram: 1. Pipe; 101. Anti-corrosion layer; 102. Reinforcing layer; 103. Polyethylene pipe; 2. Reinforcing plate; 3. First connecting mechanism; 301. First connecting plate; 302. First clamping plate; 303. First clamping groove; 304. First mounting thread; 4. Second connecting mechanism; 401. Second connecting plate; 402. Second clamping groove; 403. Second clamping plate; 404. Second mounting thread; 5. Mounting plate; 6. Mounting hole; 7. Mounting screw; 8. Embedded rib. Detailed Implementation
[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] Please see Figures 1-5 In this embodiment of the utility model, a pre-embedded sleeve with screw holes includes a pipe 1, a first connecting mechanism 3, and a second connecting mechanism 4. The pipe 1 includes an anti-corrosion layer 101, a reinforcing layer 102, and a polyethylene pipe 103. The outer surface of the polyethylene pipe 103 is connected to the reinforcing layer 102, and the outer surface of the reinforcing layer 102 is connected to the anti-corrosion layer 101. This not only gives the pipe 1 anti-corrosion and high-strength characteristics, but also significantly increases the strength of the connection of the pipe 1. This solves the problem mentioned in the background art that the current pre-embedded sleeves are only connected by threads, resulting in poor stability of the threaded sleeves. The pre-embedded sleeves are prone to breakage or water leakage at the connection, which affects people's use of the pre-embedded sleeves.
[0025] The anti-corrosion layer 101 is made of epoxy resin, and the reinforcing layer 102 is made of woven glass fiber. The first connecting mechanism 3 includes a first connecting plate 301, and the second connecting mechanism 4 includes a second connecting plate 401. The inner wall of the first connecting plate 301 is provided with a first mounting thread 304, and the inner wall of the second connecting plate 401 is provided with a second mounting thread 404. The outer surfaces of the first connecting plate 301 and the second connecting plate 401 are both connected to the pipe 1. The outer surfaces of the first connecting plate 301 and the second connecting plate 401 are both equipped with ring-shaped mounting plates 5, which can enhance the anti-corrosion and high-strength characteristics of the pipe 1, thereby significantly increasing the service life of the pipe 1.
[0026] Each mounting plate 5 has mounting holes 6 on its outer surface, and each mounting hole 6 has mounting screws 7 inside. Two sets of embedded ribs 8 are installed on the outer surface of the pipe 1, and a reinforcing plate 2 is installed on the outer surface of the pipe 1. A first clamping plate 302 is installed on the front of the first connecting plate 301, a first clamping groove 303 is opened on the front of the second connecting plate 401, a second clamping groove 402 is opened on the back of the second connecting plate 401, and a second clamping plate 403 is installed on the back of the second connecting plate 401, which greatly increases the strength of the connection of the pipe 1.
[0027] The working principle of this utility model is as follows: First, the polyethylene pipe 103 forms the pipeline channel as the core. The glass fiber braided reinforcement layer 102 on the outside enhances the compressive strength through the warp and weft interlacing structure, preventing the sleeve from being deformed by external force. The outermost epoxy resin anti-corrosion layer 101 forms a dense film layer through molecular cross-linking, isolating the internal structure from the erosion of acid and alkali media. Then, the first locking plate 302 of the first connecting mechanism 3 and the first locking groove 303 of the second connecting mechanism 4 form an initial positioning engagement. At the same time, the second locking plate 403 on the back of the second connecting plate 401 can dock with the second locking groove 402 of the adjacent component. The double engagement structure achieves rapid pre-fixation. Then, the first mounting thread 304 and the second mounting thread 404 are precisely aligned. After screwing in the screw, a rigid connection can be formed. The ring-shaped mounting plate 5 is fixed to the building template by the mounting screw 7 to ensure accurate positioning during pre-embedding. The pre-embedded reinforcement 8 forms a mechanical anchor after being inserted into the concrete. The reinforcing plate 2 increases the contact area with the concrete.
[0028] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalent elements of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A pre-embedded sleeve with screw holes, comprising a pipe (1), a first connecting mechanism (3), and a second connecting mechanism (4), characterized in that, The pipeline (1) includes an anti-corrosion layer (101), a reinforcing layer (102), and a polyethylene pipe (103). The outer surface of the polyethylene pipe (103) is connected to the reinforcing layer (102), and the outer surface of the reinforcing layer (102) is connected to the anti-corrosion layer (101).
2. The pre-embedded sleeve with screw holes according to claim 1, characterized in that, The anti-corrosion layer (101) is made of epoxy resin, and the reinforcing layer (102) is made of woven glass fiber.
3. The pre-embedded sleeve with screw holes according to claim 1, characterized in that, The first connecting mechanism (3) includes a first connecting plate (301), and the second connecting mechanism (4) includes a second connecting plate (401). The inner wall of the first connecting plate (301) is provided with a first mounting thread (304), and the inner wall of the second connecting plate (401) is provided with a second mounting thread (404).
4. The pre-embedded sleeve with screw holes according to claim 3, characterized in that, The outer surfaces of the first connecting plate (301) and the second connecting plate (401) are both connected to the pipe (1), and the outer surfaces of the first connecting plate (301) and the second connecting plate (401) are both equipped with mounting plates (5) arranged in a ring.
5. A pre-embedded sleeve with screw holes according to claim 4, characterized in that, Each mounting plate (5) has a mounting hole (6) on its outer surface, and each mounting hole (6) has a mounting screw (7) inside.
6. A pre-embedded sleeve with screw holes according to claim 1, characterized in that, Two sets of pre-embedded reinforcing bars (8) are installed on the outer surface of the pipe (1), and a reinforcing plate (2) is installed on the outer surface of the pipe (1).
7. A pre-embedded sleeve with screw holes according to claim 3, characterized in that, The first connecting plate (301) has a first card plate (302) installed on its front side, and the second connecting plate (401) has a first card slot (303) on its front side.
8. A pre-embedded sleeve with screw holes according to claim 3, characterized in that, The second connecting plate (401) has a second slot (402) on its back side, and a second card plate (403) is installed on the back side of the second connecting plate (401).