A protective sleeve for plastic pipe fittings
By designing a hinged plastic pipe fitting protective sleeve, the problem of the non-adjustable angle of existing protective sleeves was solved, enabling flexible installation, enhancing weather resistance, and extending the service life of the connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN JINYI PLASTIC PIPE IND
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-07
AI Technical Summary
The protective sleeves at the joints of existing plastic pipe fittings cannot be flexibly adjusted in angle, resulting in troublesome installation and insufficient weather resistance.
Design a hinged plastic pipe protective sleeve that allows for angle adjustment via connectors, uses a rubber layer for sealing and fixing, and employs clamping components and reinforcements to ensure a stable connection.
The angle of the protective sleeve is adjustable, which improves the flexibility and sealing of installation, and enhances the weather resistance and service life of the connection.
Smart Images

Figure CN224469926U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline design technology, and more specifically, to a protective sleeve for plastic pipe fittings. Background Technology
[0002] Plastic-lined aluminum alloy pipe is a type of pipe system where the outer tube is made of aluminum alloy and the inner tube is made of different materials of polymer plastic. The pipes and fittings are connected by heat fusion to form a pipeline system. In this type of pipeline system, the outer aluminum alloy layer of the plastic-lined aluminum alloy pipe needs to be removed at the heat fusion joint. As a result, the plastic inner tube at this joint will inevitably be exposed to the air, which will affect the weather resistance and service life of the joint. Therefore, protective measures need to be taken for both the plastic inner tube and the fittings at this joint to increase their weather resistance and service life. Thus, a protective sleeve needs to be added at the joint to prevent the plastic inner tube from being exposed to the outer tube.
[0003] Current protective cases are all of a standard design, mostly linear, right-angle, and T-shaped. Custom designs are required at specific angles where the edges meet, making installation more complicated. Utility Model Content
[0004] This utility model provides a protective sleeve for plastic pipe fittings, the purpose of which is to make the bending angle of the protective sleeve adjustable and to make it more adaptable.
[0005] The embodiments of this utility model are achieved through the following technical solutions:
[0006] A protective sleeve for plastic pipe fittings includes a first section and a second section of pipe shell, which are hinged together by a connector. The first and second sections of pipe shell are designed to open and close, and a clamping component is provided at the opening to fix the opening. A rubber layer is wrapped between the first and second sections of pipe shell.
[0007] Furthermore, the connector includes a first connecting plate and a second connecting plate, which are respectively fixed on a first section and a second section of the tube shell, and are hinged together.
[0008] Furthermore, the clamping assembly consists of an L-shaped groove and a strip-shaped clamp installed at one end of the opening. The outer edge of the L-shaped groove is tilted inward at a certain angle to clamp the clamp and complete the opening and closing of the first and second sections of the tube shell.
[0009] Furthermore, a mounting groove is provided on one side of the hinged joint between the first section and the second section of the tube shell. A reinforcing member is installed in the mounting groove. The reinforcing member includes a first mounting end and a second mounting end. Multiple sets of first mounting holes are provided in the mounting groove. Second mounting holes are provided on the first mounting end and the second mounting end.
[0010] Furthermore, the first mounting hole is a circular hole, which is installed at equal intervals on the mounting groove, and the second mounting hole is a strip-shaped hole, which is respectively set on both sides of the first mounting end and the second mounting end.
[0011] Furthermore, protrusions, strip-shaped mounting holes, and round mounting holes are respectively provided on both sides of the rubber layer. The protrusions are installed on one end of the rubber layer, the round mounting holes are installed on the other end of the rubber layer, and the strip-shaped mounting holes are located between the protrusions and the round mounting holes. Positioning holes and third mounting holes are provided on the first and second sections of the tube shell. The positioning holes are used to cooperate with the installation of the protrusions, and the third mounting holes are used to cooperate with the installation of the strip-shaped mounting holes and the round mounting holes.
[0012] Furthermore, a metal coil is embedded in the circular mounting hole.
[0013] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:
[0014] The hinged connection between the first and second sections of the pipe shell allows for angle adjustment when covering the inner pipe of the fitting with different connection angles. Then, the gap between the first and second sections of the pipe shell is covered by a rubber layer, and the toughness of the rubber layer is used to achieve a relative seal after bending. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a top view of the structure of this utility model;
[0017] Figure 2 This is a front view structural diagram of the present utility model;
[0018] Figure 3 This is a diagram of the rubber layer structure;
[0019] Figure 4 This is a structural diagram showing the clamping state of the clamping component.
[0020] Icons: 1-Section 1 of the tube shell, 2-Section 2 of the tube shell, 3-First connecting plate, 4-Second connecting plate, 5-L-shaped slot, 6-Clip, 7-Mounting slot, 8-First mounting hole, 9-First mounting end, 10-Second mounting end, 11-Second mounting hole, 12-Rubber layer, 13-Protrusion, 14-Strip mounting hole, 15-Round mounting hole, 16-Metal coil, 17-Positioning hole, 18-Third mounting hole. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0022] Example 1
[0023] A protective sleeve for plastic pipe fittings includes a first section 1 and a second section 2 of the pipe shell. The first section 1 and the second section 2 are hinged together by a connector. After the hinged connection, the relative angle between the first section 1 and the second section 2 can be freely changed to achieve the effect of covering pipe connections at specific angles. The first section 1 and the second section 2 are designed to open and close simultaneously. The openings of the first section 1 and the second section 2 are on a straight line, and the hinged ends are also on a straight line, allowing the first section 1 and the second section 2 to open and close simultaneously without interference. A clamping assembly is provided at the opening of both the first section 1 and the second section 2 to fix the opening and close it. The clamping assembly consists of an L-shaped groove 5 and a strip-shaped clamp 6 installed at one end of the opening. The outer edge of the L-shaped groove 5 is inclined inward at a certain angle to clamp the clamp 6, thus fixing the first section 1 and the second section 2. The locking and fixing are achieved by inserting the clip 6 into the L-shaped slot 5. The slot itself has a certain degree of flexibility, and when removed, the edge of the outer plate slot detaches from the fixation of the slot. The connecting component includes a first connecting plate 3 and a second connecting plate 4, which are respectively fixed to the first section 1 and the second section 2 of the tube shell. The first connecting plate 3 and the second connecting plate 4 are hinged together, and the hinge and angle adjustment between the first section 1 and the second section 2 of the tube shell are achieved through the first connecting plate 3 and the second connecting plate 4. A rubber layer 12 is covered in the gap between the first section 1 and the second section 2 of the tube shell. The rubber layer 12 is used to seal the gap between the first section 1 and the second section 2 of the tube shell, and the flexibility of the rubber layer 12 itself allows for adaptive adjustment of the rubber layer 12 under different bending angles.
[0024] A mounting groove 7 is provided on one side of the hinged joint between section 1 and section 2 of the tube shell. A reinforcing member is installed within the mounting groove 7, comprising a first mounting end 9 and a second mounting end 10. Multiple sets of first mounting holes 8 are provided within the mounting groove 7, and second mounting holes 11 are provided on the first mounting end 9 and the second mounting end 10. The first mounting holes 8 are circular and are evenly spaced within the mounting groove 7. The second mounting holes 11 are strip-shaped and are respectively located on both sides of the first mounting end 9 and the second mounting end 10. The mounting groove 7 and the reinforcing member on section 1 and section 2 of the tube shell are used for reinforcement after the angle of section 1 and section 2 of the tube shell is adjusted. The adjusted section 1 and section 2 of the tube shell are fixedly connected by the reinforcing member, and the bending angle is fixed. During installation, the first mounting end 9 and the second mounting end 10 are respectively embedded in the mounting groove 7 of section 1 and section 2 of the tube shell, and screws are driven into the strip-shaped second mounting holes 11 and the circular first mounting holes 8 to complete the fixation. The strip-shaped second mounting hole 11 can be used for fine-tuning the angle. After any angle adjustment, a screw can be driven into the strip-shaped second mounting hole 11.
[0025] The rubber layer 12 has protrusions 13, strip-shaped mounting holes 14, and round mounting holes 15 on both sides. The protrusions 13 are installed on one end of the rubber layer 12, and the round mounting holes 15 are installed on the other end. The strip-shaped mounting holes 14 are located between the protrusions 13 and the round mounting holes 15. Positioning holes 17 and third mounting holes 18 are provided on the first section 1 and the second section 2 of the pipe shell. The positioning holes 17 are used to cooperate with the installation of the protrusions 13, and the third mounting holes 18 are used to cooperate with the installation of the strip-shaped mounting holes 14 and the round mounting holes 15. A metal coil 16 is embedded in the round mounting hole 15. The overall installation sequence is as follows: first, the first section 1 and the second section 2 of the pipe shell are opened and closed to cover the pipe connector, then the clamping assembly is used to clamp them, and then the reinforcement is installed to fix the angle. Finally, the rubber layer 12 is installed to complete the seal and prevent the plastic inner tube from being exposed.
[0026] When installing the rubber layer 12, first insert the protrusion 13 at one end of the rubber layer 12 into the positioning hole 17, and then wrap the rubber layer 12 around the first section 1 and the second section 2 of the tube shell more than once. The round hole mounting hole 15 at the other end of the rubber layer 12 covers the third mounting hole 18. Use screws to seal and install the rubber layer 12 through the round hole mounting hole 15 and the third mounting hole 18.
[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A protective sleeve for plastic pipe fittings, characterized in that: It includes a first section (1) and a second section (2) of the shell. The first section (1) and the second section (2) of the shell are hinged together by a connector. The first section (1) and the second section (2) of the shell are designed to open and close. A clamping component is provided at the opening to fix the opening. A rubber layer (12) is wrapped between the first section (1) and the second section (2).
2. The protective sleeve for plastic pipe fittings according to claim 1, characterized in that: The connector includes a first connecting plate (3) and a second connecting plate (4), which are respectively fixed on the first section (1) and the second section (2) of the shell. The first connecting plate (3) and the second connecting plate (4) are hinged together.
3. The protective sleeve for plastic pipe fittings according to claim 1, characterized in that: The clamping assembly consists of an L-shaped groove (5) and a strip-shaped clamp (6) installed on one end of the opening. The outer edge of the L-shaped groove (5) is tilted inward at a certain angle to clamp the clamp (6) and complete the opening and closing of the first section (1) and the second section (2) of the tube shell.
4. A protective sleeve for plastic pipe fittings according to claim 1, characterized in that: A mounting groove (7) is provided on one side of the hinged section (1) and section (2) of the tube shell. A reinforcing member is installed in the mounting groove (7). The reinforcing member includes a first mounting end (9) and a second mounting end (10). Multiple sets of first mounting holes (8) are provided in the mounting groove (7). Second mounting holes (11) are provided on the first mounting end (9) and the second mounting end (10).
5. A protective sleeve for plastic pipe fittings according to claim 4, characterized in that: The first mounting hole (8) is a round hole and is installed at equal intervals on the mounting groove (7). The second mounting hole (11) is a strip-shaped hole and is respectively set on both sides of the first mounting end (9) and the second mounting end (10).
6. A protective sleeve for plastic pipe fittings according to claim 1, characterized in that: The rubber layer (12) is provided with a protrusion (13), a strip-shaped mounting hole (14) and a round mounting hole (15) on both sides respectively. The protrusion (13) is installed on one end of the rubber layer (12), and the round mounting hole (15) is installed on the other end of the rubber layer (12). The strip-shaped mounting hole (14) is located between the protrusion (13) and the round mounting hole (15). A positioning hole (17) and a third mounting hole (18) are provided on the first section (1) and the second section (2) of the tube shell. The positioning hole (17) is used to cooperate with the installation of the protrusion (13), and the third mounting hole (18) is used to cooperate with the installation of the strip-shaped mounting hole (14) and the round mounting hole (15).
7. A protective sleeve for plastic pipe fittings according to claim 6, characterized in that: A metal coil (16) is embedded in the circular mounting hole (15).