Steel-plastic joint with multi-layer composite structure

Abstract

The utility model relates to pipe joint technical field more specifically, relate to a kind of steel plastic joint with multilayer composite structure, comprising: joint body, joint body includes by outer to inner sequentially arranged outer plastic layer, intermediate reinforcing layer and inner adhering layer, intermediate reinforcing layer is equipped with sound absorption groove, inner side wall on the inner adhering layer is equipped with flow guide portion, and joint body both ends are equipped with the socket for connecting pipe material.In the intermediate reinforcing layer of higher material strength, sound absorption groove is set, according to the sound absorption effect of sound absorption groove, the vibration damping of the greater effect of intermediate reinforcing layer is combined, water flow noise can be greatly absorbed, and flow guide portion is further set on the inner adhering layer, water flow is guided from inside, water flow impact intensity is reduced, and each part structure is jointly used to fully improve sound absorption effect, reduce water flow noise, meet the demand of market to high-performance silent pipe material joint, improve market competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting technology, and more specifically, to a steel-plastic joint with a multi-layer composite structure. Background Technology

[0002] In existing building piping systems, unstable water pressure and flow velocity can easily lead to noise from water impacting the pipes, especially at pipe joints where the noise is more pronounced and the performance is poor. Therefore, the market demand for pipe joints with sound-absorbing properties is increasing. Existing technology discloses a socket-type sound-absorbing tee, including a main connecting pipe, a connecting branch pipe located on one side of the main connecting pipe, a connecting nut, a sealing ring, and a gasket. The upper and lower ends of the main connecting pipe and the connecting branch pipe each have joints with flared ends. The outer circumferential surface of the flared end of the main connecting pipe has an external thread that mates with the internal thread of the connecting nut, and the flared end of the main connecting pipe has a socket for installing the sealing ring and gasket. The flared end of the main connecting pipe has a socket for inserting an external pipe, and the flared end of the connecting branch pipe has a socket for inserting an external pipe. This tee joint uses trapezoidal sound-absorbing ribs to reduce noise generated by water impact, but the sound absorption effect is limited, and the overall strength is generally weak, posing a risk of loosening and leakage. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, such as the relatively high water flow noise in pipe joints and the generally poor sound absorption effect of disclosed sound-absorbing pipe joints in actual use, this utility model provides a steel-plastic joint with a multi-layer composite structure, which improves the sound absorption effect of the pipe joint, reduces water flow noise, meets the market demand for high-performance silent pipe joints, and enhances market competitiveness.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a steel-plastic joint with a multi-layer composite structure, comprising: a joint body, the joint body comprising an outer plastic layer, an intermediate reinforcing layer and an inner bonding layer arranged sequentially from the outside to the inside, the intermediate reinforcing layer having a sound-absorbing groove, the inner sidewall of the inner bonding layer having a flow guiding part, and the joint body having sockets for connecting pipes at both ends.

[0005] The steel-plastic joint has three layers from the outside to the inside: an outer plastic layer, a middle reinforcing layer, and an inner bonding layer. The outer plastic layer and the middle reinforcing layer are injection molded. The middle reinforcing layer is made of a high-strength material, preferably a metal such as brass, stainless steel, or iron. Sound-absorbing grooves are set in the middle reinforcing layer to absorb water flow noise. A flow guide is set in the inner bonding layer to guide the water flow, reduce turbulence impact, and further reduce water flow noise. The sound-absorbing grooves are located on the high-strength middle reinforcing layer, which has high vibration damping and can effectively prevent sound waves from propagating outward, resulting in better sound absorption. Furthermore, an outer plastic layer is injection molded on the outer wall of the middle reinforcing layer to further enhance the sound absorption effect. The sound-absorbing grooves can be specifically designed as cavity-shaped grooves or through channels. The flow guide protrudes from the inner wall of the inner bonding layer and is designed as a thread or ring.

[0006] Preferably, it further includes a spacer strip disposed on the intermediate reinforcing layer and a sound-absorbing element, wherein adjacent sound-absorbing grooves are separated by the spacer strip and the sound-absorbing element is disposed within the sound-absorbing groove.

[0007] Spacer strips are used to separate sound-absorbing grooves, and sound-absorbing components are installed to further improve the sound absorption effect of the joints; the sound-absorbing components can be sound-absorbing sponge, sound-absorbing foam, sound-absorbing foam plastic, sound-absorbing limiting plates of various materials, or other porous materials.

[0008] Preferably, the sound-absorbing groove is cavity-shaped and its inner surface is arc-shaped.

[0009] The sound-absorbing groove is designed as a cavity, which is more conducive to placing sound-absorbing components. At the same time, the inner side of the sound-absorbing groove is designed as a curved surface to avoid cracking at the inner edge of the groove and to improve the overall strength of the connector body.

[0010] Preferably, the guide portion is in the form of a single-threaded or multi-threaded shape.

[0011] A threaded guide section provides better flow guidance. Depending on the actual working conditions or pipe diameter, it can be designed as a single-thread or multi-threaded section.

[0012] Preferably, the height of the protrusion of the guide portion is gradually changing, and the height of the protrusion in the middle is higher than that of the protrusions at both ends.

[0013] The guide section gradually bulges from both ends toward the middle, further enhancing the guiding effect. It can guide the water flow forward in a spiral shape and drop down, shearing and buffering the fluid surface, eliminating the impact of the water flow on the inner wall, slowing down the flow velocity, and gradually releasing the energy accumulated inside. This makes the flow more stable, reducing turbulent impact and further reducing noise generation.

[0014] Preferably, both the intermediate reinforcing layer and the inner bonding layer are provided with the flow guiding portion, and the inner bonding layer is shaped according to the inner sidewall surface of the intermediate reinforcing layer.

[0015] The inner bonding layer is shaped like a thin wall, with a flow guide on the middle reinforcement layer. The inner bonding layer is also shaped according to the inner wall surface of the middle reinforcement layer, which enhances the connection or bonding effect between the inner bonding layer and the middle reinforcement layer. This also allows the middle reinforcement layer to participate in buffering and stress relief, thus improving the buffering effect.

[0016] Preferably, the outer wall of the intermediate reinforcing layer is provided with a plurality of protrusions, and the protrusions are generally in a ring shape.

[0017] The protrusions increase the contact area between the intermediate reinforcing layer and the outer plastic layer, improving the connection strength. Furthermore, the protrusions are annular and surround the intermediate reinforcing layer, resulting in even higher connection strength.

[0018] Preferably, the protrusion is provided with a snap fastener, and when the outer plastic layer is connected to the intermediate reinforcing layer, an inverted snap structure is formed that cooperates with the protrusion.

[0019] A snap-fit ​​is provided on the protrusion to further enhance the connection stability between the intermediate reinforcing layer and the outer plastic layer, and further improve the overall strength of the connector body; the outer plastic layer is injection molded, and during production, the outer plastic layer covers the outer wall of the intermediate reinforcing layer and fills the structure around the protrusion to form an undercut structure that matches the protrusion.

[0020] Preferably, it also includes sealing rings that are connected to the inner bonding layer, and the sealing rings are located inside the socket.

[0021] Preferably, each of the sockets is provided with at least two sealing rings.

[0022] The sealing rings are respectively installed at the socket, and each socket has at least two sealing rings to improve the connection sealing performance.

[0023] Compared with the prior art, the beneficial effects of this utility model are: Sound-absorbing grooves are set on the intermediate reinforcing layer with high material strength. Based on the sound absorption effect of the sound-absorbing grooves, combined with the large vibration damping effect of the intermediate reinforcing layer, water flow noise can be significantly absorbed. Furthermore, a flow guide is set on the inner bonding layer to guide the water flow from the inside and reduce the impact intensity of the water flow. All parts of the structure work together to fully improve the sound absorption effect, reduce water flow noise, meet the market demand for high-performance silent pipe joints, and improve market competitiveness. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the internal structure of a steel-plastic joint with a multi-layer composite structure according to this utility model; Figure 2This is a structural schematic diagram of the sound-absorbing groove and sound-absorbing component of a steel-plastic joint with a multi-layer composite structure according to this utility model; Figure 3 This is a side view structural diagram of a steel-plastic joint with a multi-layer composite structure according to this utility model.

[0025] In the diagram: 1. Connector body; 2. Outer plastic layer; 3. Middle reinforcing layer; 4. Inner bonding layer; 5. Sound-absorbing groove; 6. Airflow guide; 7. Socket; 8. Spacer strip; 9. Sound-absorbing component; 10. Protrusion; 11. Clip; 12. Inverted snap structure; 13. Sealing ring. Detailed Implementation

[0026] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0027] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example 1 like Figure 1-2 As shown, a steel-plastic joint with a multi-layer composite structure includes: a joint body 1, the joint body 1 including an outer plastic layer 2, an intermediate reinforcing layer 3 and an inner bonding layer 4 arranged sequentially from the outside to the inside, the intermediate reinforcing layer 3 having a sound-absorbing groove 5, the inner sidewall of the inner bonding layer 4 having a flow guiding part 6, and the joint body 1 having sockets 7 at both ends for connecting pipes.

[0029] The steel-plastic joint body 1 has three layers from the outside to the inside: an outer plastic layer 2, a middle reinforcing layer 3, and an inner bonding layer 4. The outer plastic layer 2 and the middle reinforcing layer 3 are respectively made by injection molding. The middle reinforcing layer 3 is made of a high-strength material, preferably a metal material, such as brass, stainless steel, or iron. Specifically, a sound-absorbing groove 5 is provided on the middle reinforcing layer 3 to absorb water flow noise. A flow guide 6 is provided in the inner bonding layer 4 to guide the water flow, reduce turbulence impact, and further reduce water flow noise. The sound-absorbing groove 5 is located on the middle reinforcing layer 3, which has high material vibration damping, which can effectively prevent sound waves from propagating outward, resulting in better sound absorption. Furthermore, the outer plastic layer 2 is also injection molded on the outer wall of the middle reinforcing layer 3, which can further enhance the sound absorption effect. The sound-absorbing groove 5 can be specifically designed as a cavity-shaped groove or a through groove. The flow guide 6 protrudes from the inner wall of the inner bonding layer 4 and is designed as a thread or ring.

[0030] The beneficial effects of this embodiment are as follows: a sound-absorbing groove 5 is provided on the intermediate reinforcing layer 3 with high material strength. Based on the sound absorption effect of the sound-absorbing groove 5, combined with the large vibration damping effect of the intermediate reinforcing layer 3, water flow noise can be greatly absorbed. Furthermore, a flow guide 6 is provided on the inner bonding layer 4 to guide the water flow from the inside and reduce the impact intensity of the water flow. The various structural parts work together to fully improve the sound absorption effect, reduce water flow noise, meet the market demand for high-performance silent pipe joints, and improve market competitiveness.

[0031] Example 2 This embodiment further defines the features of Embodiment 1, and its difference from Embodiment 1 lies in: like Figure 1-3 As shown, it also includes a spacer strip 8 disposed on the intermediate reinforcing layer 3 and a sound-absorbing component 9. Adjacent sound-absorbing grooves 5 are separated by the spacer strip 8, and the sound-absorbing component 9 is disposed within the sound-absorbing groove 5. The sound-absorbing groove 5 is cavity-shaped with arc-shaped inner surfaces. The flow guide 6 is in the form of a single-thread or multi-thread. The protrusion height of the flow guide 6 is gradually changing, with the protrusion height in the middle being higher than that at both ends. Both the intermediate reinforcing layer 3 and the inner bonding layer 4 are respectively provided with the flow guide 6, and the inner bonding layer 4 is shaped according to the inner wall surface of the intermediate reinforcing layer 3.

[0032] Spacer strips 8 are used to separate sound-absorbing grooves 5, and sound-absorbing components 9 are installed to further enhance the sound absorption effect of the joint. Sound-absorbing components 9 can be selected from sound-absorbing sponge, sound-absorbing foam, sound-absorbing foam plastic, sound-absorbing limiting plates of various materials, or other porous materials. The cavity shape of the sound-absorbing groove 5 facilitates the placement of the sound-absorbing components 9, and the inner surfaces of the sound-absorbing groove 5 are all curved to avoid cracking at the inner edges of the groove, thus improving the overall strength of the joint body 1. The flow guide 6 is designed with a threaded shape for better flow guidance; it can be designed as a single-thread or multi-thread shape depending on the actual working conditions or pipe diameter. The flow guide 6 gradually bulges from both ends towards the middle, further enhancing the flow guidance effect. It can guide the water flow forward in a spiral shape, shearing and buffering the fluid surface, eliminating the impact of the water flow on the inner wall, slowing the flow velocity, and gradually releasing the energy accumulated inside. This results in a smoother flow, reducing turbulent impact and further reducing noise generation. The inner bonding layer 4 is generally in the shape of a thin wall. A guide part 6 is provided on the middle reinforcement layer 3. At the same time, the inner bonding layer 4 is shaped according to the inner side wall surface of the middle reinforcement layer 3 to enhance the connection or bonding effect between the inner bonding layer 4 and the middle reinforcement layer 3. It also allows the middle reinforcement layer 3 to participate in buffering and stress relief, thereby improving the buffering effect.

[0033] Furthermore, in this embodiment, the outer plastic layer 2 is improved in strength and toughness by adding fillers such as barium sulfate and calcium carbonate. It can also ensure pressure resistance and impact resistance in long-term use, maintain stable performance, extend service life, and effectively block the outward transmission of sound. Furthermore, the inner bonding layer 4 is optimized at the microscopic level by adding specific additives or modifiers to ensure that the material of the inner bonding layer 4 is well matched with the PVC-U water supply pipe in terms of performance. It can also ensure stable pressure resistance and sealing performance of the connection parts in long-term use, prevent pipe bursting due to large differences in material properties, improve the weather resistance and service life of the pipe, and add nano-sized particles to the matrix material to enhance the absorption and blocking ability of vibration sound without affecting the performance advantages of the material itself.

[0034] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0035] Example 3 Based on Example 1 or Example 2, Example 1 or Example 2 are further defined, with the following differences: like Figure 1-3 As shown, the outer wall of the intermediate reinforcing layer 3 has multiple protrusions 10, each protrusion 10 being annular in shape. Each protrusion 10 has a snap-fit ​​11, forming an inverted snap-fit ​​structure 12 that engages with the protrusion 10 when the outer plastic layer 2 is connected to the intermediate reinforcing layer 3. It also includes sealing rings 13 connected to the inner bonding layer 4, each sealing ring 13 located within the socket 7. Each socket 7 contains at least two sealing rings 13.

[0036] The protrusion 10 increases the contact area between the intermediate reinforcing layer 3 and the outer plastic layer 2, improving the connection strength. Furthermore, the protrusion 10 is annular and surrounds the intermediate reinforcing layer 3, resulting in even higher connection strength. A snap-fit ​​11 is provided on the protrusion 10 to further enhance the connection stability between the intermediate reinforcing layer 3 and the outer plastic layer 2, further improving the overall strength of the connector body 1. The outer plastic layer 2 is injection molded; during production, the outer plastic layer 2 covers the outer wall of the intermediate reinforcing layer 3 and fills the structure around the protrusion 10, forming an undercut structure 12 that mates with the protrusion 10. Sealing rings 13 are respectively provided at the sockets 7, and each socket 7 has at least two sealing rings 13 to improve the connection sealing performance.

[0037] Furthermore, in this embodiment, a high-performance sealing ring containing sound-absorbing fibers is used. This type of sealing ring has better elasticity, corrosion resistance, and sealing effect, and can adapt to different working environments. It not only ensures the sealing of the connection and prevents water leakage, but also absorbs and blocks the noise generated when water flows through the joint. The sound-absorbing fibers are made of materials such as quartz, cotton, linen, and polyester, depending on the product.

[0038] The remaining working principles and processes of this embodiment are the same as those of Embodiment 1 or Embodiment 2.

[0039] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A steel-plastic joint with a multi-layer composite structure, characterized in that, include: The connector body (1) includes an outer plastic layer (2), an intermediate reinforcing layer (3) and an inner bonding layer (4) arranged sequentially from the outside to the inside. The intermediate reinforcing layer (3) is provided with a sound-absorbing groove (5), and the inner sidewall of the inner bonding layer (4) is provided with a flow guide (6). The connector body (1) has sockets (7) at both ends for connecting pipes.

2. A steel-plastic joint with a multi-layer composite structure according to claim 1, characterized in that: It also includes a spacer (8) disposed on the intermediate reinforcement layer (3) and a sound-absorbing element (9), wherein adjacent sound-absorbing grooves (5) are separated by the spacer (8) and the sound-absorbing element (9) is disposed in the sound-absorbing groove (5).

3. A steel-plastic joint with a multi-layer composite structure according to claim 2, characterized in that: The sound-absorbing groove (5) is cavity-shaped and its inner surface is arc-shaped.

4. A steel-plastic joint with a multi-layer composite structure according to claim 1, characterized in that: The guide section (6) is in the form of a single thread or a multi-thread.

5. A steel-plastic joint with a multi-layer composite structure according to claim 4, characterized in that: The height of the protrusion of the guide section (6) is gradually changing, and the height of the protrusion in the middle is higher than that of the protrusions at both ends.

6. A steel-plastic joint with a multi-layer composite structure according to claim 5, characterized in that: The intermediate reinforcing layer (3) and the inner bonding layer (4) are each provided with the flow guide (6), and the inner bonding layer (4) is shaped according to the inner sidewall surface of the intermediate reinforcing layer (3).

7. A steel-plastic joint with a multi-layer composite structure according to claim 1, characterized in that: The outer side wall of the intermediate reinforcing layer (3) is provided with a plurality of protrusions (10), and the protrusions (10) are generally in the shape of a ring.

8. A steel-plastic joint with a multi-layer composite structure according to claim 7, characterized in that: The protrusion (10) is provided with a buckle (11), and when the outer plastic layer (2) is connected to the intermediate reinforcing layer (3), an inverted buckle structure (12) is formed to cooperate with the protrusion (10).

9. A steel-plastic joint with a multi-layer composite structure according to claim 1, characterized in that: It also includes sealing rings (13) that are connected to the inner bonding layer (4) respectively, and the sealing rings (13) are located inside the socket (7).

10. A steel-plastic joint with a multi-layer composite structure according to claim 9, characterized in that: Each of the sockets (7) is provided with at least two sealing rings (13).

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