Double-sleeve connecting piece and outer sleeve

Abstract

The double-sleeve connecting piece comprises a large-diameter pipe and a small-diameter pipe located at one end of the large-diameter pipe, the large-diameter pipe and the small-diameter pipe are integrally formed, the large-diameter pipe is fixedly connected with a large pipeline in double sleeves, and the inner wall of the small-diameter pipe makes contact with the outer wall of a small pipeline in the double sleeves; the front end of the small-diameter pipe is fixedly connected with a rubber ring, and the rubber ring is provided with an enclasping piece for tightly pressing the rubber ring on the small pipeline. According to the double-sleeve connecting piece, connection of a large-diameter pipe and a small-diameter pipe can be achieved, the small-diameter pipe is protected in a sleeve mode, and the risk of water leakage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipeline protection and connection, specifically to a double-sleeve connector and an outer sleeve. Background Technology

[0002] In the construction of industrial plants and similar facilities, outdoor pipe rack systems serve as critical infrastructure, bearing the burden of laying various process pipelines. Especially in industries such as chemical and metallurgy, large quantities of corrosive liquids such as acids and alkalis need to be transported via overhead pipelines. To ensure safe production and prevent secondary disasters caused by pipeline leaks, the industry commonly adopts a double-sleeve structure, which involves adding a larger sleeve outside the main pipeline transporting the liquid, forming a double protective barrier. However, in practical engineering applications, the connection technology of double-sleeve systems still has significant shortcomings, becoming a key bottleneck restricting their protective effectiveness.

[0003] Existing double-pipe systems often employ a simple plug-and-hole connection method: first, a hole is drilled at a predetermined location on the pipe, then the delivery pipe is passed through the hole, and the plug and sealant are used for fixation and waterproofing. While this method achieves basic connection functionality, the hole-making process relies heavily on manual operation, making it difficult to ensure precise matching with the outer diameter of the delivery pipe, resulting in irregular gaps between the hole and the pipe. Furthermore, the sealing reliability is low: waterproofing relies on the adhesive strength of the sealant, but over long-term use, factors such as media corrosion and temperature cycling can cause the sealant to age and fail, creating leakage channels. Utility Model Content

[0004] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a double-sleeve connector and an outer sleeve. The double-sleeve connector can connect large-diameter pipes and small-diameter pipes, and protect the small-diameter pipe by means of a sleeve, thereby reducing the risk of water leakage.

[0005] On one hand, the present invention provides a double-pipe connector, including a large-diameter pipe and a small-diameter pipe located at one end of the large-diameter pipe. The large-diameter pipe and the small-diameter pipe are integrally formed, wherein the large-diameter pipe is fixedly connected to the large pipe in the double-pipe, and the inner wall of the small-diameter pipe is in contact with the outer wall of the small pipe in the double-pipe.

[0006] A rubber ring is fixedly connected to the front end of the small-diameter pipe, and a clamping component is provided on the rubber ring to press the rubber ring tightly against the small pipe. Preferably, the clamping component is a clamp.

[0007] Optionally, the rubber ring is vulcanized integrally with the small-diameter pipe.

[0008] Optionally, the rubber ring is pressed against the small-diameter pipe by a clamping member, so that the outer wall of the small-diameter pipe is in close contact with the inner wall of the rubber ring.

[0009] Optionally, the rubber ring has an axially extending cavity within its ring wall.

[0010] Optionally, the materials of the large-diameter pipe and the small-diameter pipe are PPH, PVC-U, or PVDF.

[0011] On the other hand, this utility model provides an outer sleeve, which is located at the protective part of the small pipe, and the double sleeve connector is fixedly connected to both ends of the outer sleeve.

[0012] Optionally, the protected area may be a leak-prone spot in a small pipe, a connection point, or an area located above a corridor / specific equipment.

[0013] This utility model has the following advantages:

[0014] This utility model provides a double-sleeve connector and an outer sleeve. The double-sleeve connector enables the connection of large and small diameter sleeves. The large-diameter pipe and the small-diameter pipe are integrally formed, avoiding connection defects that may occur with traditional welding or bonding, and improving structural strength and sealing reliability. At the front end of the small-diameter pipe, a rubber ring contacts the outer wall of the pipe, and combined with the clamping action of a clamping component (such as a clamp), a double sealing mechanism is formed to effectively prevent media leakage.

[0015] Meanwhile, the rubber ring shown can also be integrated with a small-diameter pipe through vulcanization, further ensuring the integrity and long-term stability of the sealing structure.

[0016] The axially extending cavity inside the rubber ring can buffer pressure fluctuations, enhance structural flexibility, adapt to thermal expansion or mechanical deformation, and reduce the transmission of temperature that affects the liquid in the small pipe.

[0017] The large-diameter and small-diameter pipes are made of polymer materials such as PPH, PVC-U, and PVDF, which have excellent chemical corrosion resistance and weather resistance, making them suitable for complex industrial environments.

[0018] Meanwhile, the clamping components (such as clamps) of the double-sleeve connector can adopt a standardized design, which facilitates quick installation and disassembly and reduces construction difficulty.

[0019] The outer sleeve of this utility model has double sleeve connectors at both ends. The outer sleeve protects the small pipe, and the double sleeve connectors make the connection convenient. Attached Figure Description

[0020] Figure 1 It is the structural form of the double-sleeve connector (the rubber ring and the small-diameter pipe are fixed by a clamp);

[0021] Figure 2 This is a schematic diagram of the structure of the double-sleeve connector (rubber ring and small diameter pipe are fixed by clamp) with clamp installed;

[0022] Figure 3 This is a schematic diagram showing the usage status of the double-sleeve connector (the rubber ring and the small-diameter pipe are fixed by a clamp);

[0023] Figure 4 yes Figure 3 A magnified view of part A in the diagram;

[0024] Figure 5 This is a cross-sectional schematic diagram of the double-sleeve connector (the rubber ring and the small-diameter pipe are fixed together by a clamp) in use.

[0025] Figure 6 yes Figure 5 A magnified view of part of C;

[0026] Figure 7 It is the structural form of the double-sleeve connector (the rubber ring and the small-diameter pipe are vulcanized into one piece);

[0027] Figure 8 This is a schematic diagram of the structure of the double-sleeve connector (rubber ring and small-diameter pipe vulcanized as one piece) for installing the clamp;

[0028] Figure 9 This is a schematic diagram showing the usage status of the double-sleeve connector (the rubber ring and the small-diameter pipe are vulcanized into one piece);

[0029] Figure 10 yes Figure 9 A magnified view of part M in the diagram;

[0030] Figure 11 This is a cross-sectional schematic diagram of the double-sleeve connector (rubber ring and small-diameter pipe vulcanized together) in use;

[0031] Figure 12 yes Figure 11 A magnified view of part B in the diagram;

[0032] Figure 13 This is a schematic cross-sectional view of the ring wall of the rubber ring;

[0033] In the diagram: 100, double-pipe connector; 101, large-diameter pipe; 102, small-diameter pipe; 200, large pipe; 300, small pipe; 400, rubber ring; 401, cavity; 500, clamping component. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0035] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0036] As described in the background section, outdoor pipe rack systems serve as critical infrastructure in the construction of industrial plants and similar facilities, bearing the requirements for laying various process pipelines. Especially in industries such as chemical and metallurgy, large quantities of corrosive liquids such as acids and alkalis need to be transported via overhead pipelines. To ensure safe production and prevent secondary disasters caused by pipeline leaks, the industry commonly adopts a double-sleeve structure, which involves adding a larger sleeve to the outside of the main pipeline transporting the liquid, forming a double protective barrier. However, in practical engineering applications, the connection technology of double-sleeve systems still has significant shortcomings, becoming a key bottleneck restricting their protective effectiveness.

[0037] Existing double-pipe systems often employ a simple plug-and-hole connection method: first, a hole is drilled at a predetermined location on the pipe, then the delivery pipe is passed through the hole, and the plug and sealant are used for fixation and waterproofing. While this method achieves basic connection functionality, the hole-making process relies heavily on manual operation, making it difficult to ensure precise matching with the outer diameter of the delivery pipe, resulting in irregular gaps between the hole and the pipe. Furthermore, the sealing reliability is low: waterproofing relies on the adhesive strength of the sealant, but over long-term use, factors such as media corrosion and temperature cycling can cause the sealant to age and fail, creating leakage channels.

[0038] For the reasons mentioned above, this embodiment provides a double-sleeve connector 100, such as... Figures 1-12 As shown, it includes a large-diameter pipe 101 and a small-diameter pipe 102 located at one end of the large-diameter pipe. The large-diameter pipe is fixedly connected to the large pipe 200 in the double-walled pipe. The large-diameter pipe and the small-diameter pipe are integrally formed. The inner wall of the small-diameter pipe 102 is in contact with the outer wall of the small pipe 300 in the double-walled pipe.

[0039] A rubber ring 400 is fixedly connected to the front end of the small-diameter pipe. A clamping member 500 is provided on the rubber ring 400 to press the rubber ring against the small pipe. Preferably, the clamping member is a clamp. Optionally, the materials of the large-diameter pipe and the small-diameter pipe are PPH, PVC-U, or PVDF.

[0040] The aforementioned technical features enable the installation of an outer casing around the small pipe, preventing leaks in the small pipe from affecting other processes or the environment, especially when the small pipe is transporting strong acid or strong alkali liquids or other corrosive liquids; according to design or construction requirements, protection is required for designated locations on the small pipe.

[0041] When using this connector, confirm the required double-pipe connection and specify the specifications, materials, and other parameters of the large and small pipes to ensure they match the double-pipe connector. Securely connect the large-diameter pipe of the double-pipe connector to the large pipe within the double-pipe system. Select the appropriate connection method based on the materials of the large and small pipes. For example, if it is PPH, hot-melt welding can be used. Heat the connection area between the large and small pipes to a molten state, then quickly butt them together and apply pressure until it cools and solidifies, ensuring a strong and well-sealed connection. If it is PVC-U, use a dedicated PVC adhesive, evenly applying it to the inner and outer walls of the connection area between the large and small pipes, then fitting them together and rotating them at a certain angle to ensure the adhesive is fully distributed. After the adhesive cures, a tight connection will form. If it is PVDF, welding or mechanical connection methods can be used, following the relevant construction specifications.

[0042] Connect the small-diameter pipe with the fixed rubber ring to the small pipe in the double-pipe system. Ensure the inner wall of the small-diameter pipe is in full contact with the outer wall of the small pipe, and slowly push the small-diameter pipe into place until the predetermined connection position is reached. Once the small-diameter pipe and small pipe are properly aligned, adjust the tightness of the clamping fitting (clamp). Tighten the clamp bolts to further press the rubber ring against the outer wall of the small pipe, enhancing the sealing and stability of the connection. When tightening the clamp, closely observe the deformation of the rubber ring to ensure it fits evenly against the outer wall of the small pipe, while avoiding over-tightening that could damage the rubber ring or deform the small pipe.

[0043] To achieve the fixation of the rubber ring to the small-diameter tube, in one embodiment, such as... Figures 1-6 As shown, the rubber ring is pressed against the small-diameter pipe by a clamping member, so that the outer wall of the small-diameter pipe is tightly attached to the inner wall of the rubber ring. The clamping member (clamp) can secure the rubber ring to the small-diameter pipe, and disassembly is also very convenient.

[0044] To achieve the fixation of the rubber ring to the small-diameter tube, in another embodiment, such as... Figures 7-12 As shown, the rubber ring and the small-diameter pipe are vulcanized together. Vulcanization integrates the rubber ring and the small-diameter pipe, reducing connection points, improving stability, and lowering the risk of leakage.

[0045] To improve the fit between the rubber ring and small-diameter pipes, in one embodiment, such as... Figure 13As shown, the rubber ring 400 has an axially extending cavity 401 inside its ring wall, which is preferably a closed cavity. When the rubber ring is tightened by a clamp, the closed cavity inside the rubber ring deforms under the pressure of the clamp, resulting in better sealing of the contact area between the inner wall of the rubber ring and the small pipe or small-diameter pipe.

[0046] In another embodiment, an outer sleeve is provided, which is located at the protective part of the small pipe, and the double sleeve connector is fixedly connected to both ends of the outer sleeve; the protective part is a leaky part of the small pipe, or a connection point, or an area located above a corridor / specific equipment (such as important equipment below the small pipe, or a process that cannot be contaminated).

[0047] The outer sleeve with double-sleeve connectors combines the advantages of double-sleeve connectors, can protect small pipes, is easy to install, and reduces the risk of leakage in small pipes affecting other processes.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-sleeve connector, characterized in that: It includes a large-diameter pipe and a small-diameter pipe located at one end of the large-diameter pipe. The large-diameter pipe and the small-diameter pipe are integrally formed. The large-diameter pipe is fixedly connected to the large pipe in the double-walled pipe, and the inner wall of the small-diameter pipe is in contact with the outer wall of the small pipe in the double-walled pipe. A rubber ring is fixedly connected to the front end of the small-diameter pipe, and a clamping device is provided on the rubber ring to press the rubber ring tightly against the small pipe.

2. The double-sleeve connector according to claim 1, characterized in that: The rubber ring is vulcanized into one piece with the small-diameter pipe.

3. The double-sleeve connector according to claim 1, characterized in that: The rubber ring is pressed against the small-diameter pipe by the clamping member, so that the outer wall of the small-diameter pipe is in close contact with the inner wall of the rubber ring.

4. The double-sleeve connector according to claim 1, characterized in that: The clamping component is a clamp.

5. The double-sleeve connector according to claim 1, characterized in that: The rubber ring has an axially extending cavity inside its ring wall.

6. The double-sleeve connector according to any one of claims 1-5, characterized in that: The materials of the large-diameter pipe and the small-diameter pipe are PPH, PVC-U, or PVDF.

7. An outer sleeve, characterized in that, The outer sleeve is located at the protective part of the small pipe, and both ends of the outer sleeve are fixedly connected with the double sleeve connector as described in any one of claims 1-5.

8. The outer sleeve according to claim 7, characterized in that, The protected area is a leak-prone spot in a small pipe, a connection point, or an area located above a corridor / specific equipment.

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