High-temperature-resistant PPR pipeline

Abstract

The utility model relates to the technical field of pipelines, and discloses a high-temperature-resistant PPR pipeline which comprises an outer pipe and an inner pipe, the inner pipe and the outer pipe are coaxially arranged, threaded rods are movably inserted into the side wall of the outer pipe in a penetrating mode, the threaded rods are annularly arranged in the inner wall of the outer pipe, threads are arranged at the ends, close to the outer side of the outer pipe, of the threaded rods, and the outer pipe is sleeved with the threads. The outer end of the threaded rod is sleeved with a nut in a threaded mode, the end, close to the inner side of the outer pipe, of the threaded rod is sleeved with a spring, the end, away from the nut, of the threaded rod is fixedly connected with an arc-shaped pressing plate, and the arc-shaped pressing plate clamps and fixes the outer fastening layer through rotation of the nut, stress compression of the spring and reaction of the spring and the arc-shaped pressing plate. The multiple threaded rods are arranged to be jointly connected with the arc-shaped pressing plate, and when one position of the pipeline is subjected to external pressure, the pressure is dispersed on the arc-shaped pressing plate, so that the anti-pressure capacity of the pipeline is improved, the linear cracking phenomenon caused when the pipe is subjected to external force impact or heavy pressure is eliminated, and the pipeline is prevented from being fractured due to stress.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to a high-temperature resistant PPR pipeline. Background Art

[0002] As consumers' requirements for product environmental protection, health, durability and other aspects continue to increase, the quality level of my country's plastic pipes has been continuously improved while the output has increased. Compared with traditional cast iron pipes, galvanized steel pipes, cement pipes and other pipes, PPR pipes have the advantages of energy saving and material saving, environmental protection, light weight and high strength, corrosion resistance, smooth inner wall without scaling, easy construction and maintenance, and long service life. They are widely used in construction, municipal, industrial and agricultural fields such as building water supply and drainage, urban and rural water supply and drainage, city gas, electricity and optical cable sheathing, industrial fluid transportation, agricultural irrigation, etc. PPR pipes are generally used for embedded walls or deep well pre-buried pipes.

[0003] In low temperature conditions, especially in winter, the rigidity of PPR pipes increases and their flexibility decreases, causing the pipe to become brittle as a whole. When the pipe is impacted by external force or heavy pressure, linear cracks will appear, causing the pipe to rupture. In addition, the existing PPR pipes are monomer pipes. When the water temperature exceeds 70°C for a long time, the water pipes will soften and deform, resulting in a decrease in the water pipe's pressure resistance, and they are very easy to rupture under the impact of water pressure inside the pipe. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a high-temperature resistant PPR pipe, which has the advantages of good pressure resistance and improved heat resistance, and solves the problem that when the pipe is subjected to external force impact or heavy pressure, linear cracking will occur, thereby causing the pipe to rupture. The existing PPR pipe is a single pipe. When the water temperature exceeds 70°C for a long time, the water pipe will soften and deform, resulting in a decrease in the pressure resistance of the water pipe, and it is very easy to rupture under the impact of water pressure in the pipe.

[0005] The utility model provides the following technical solution: a high-temperature resistant PPR pipe, comprising an outer tube and an inner tube, and the inner tube and the outer tube are coaxially arranged, a threaded rod is movably inserted into the side wall of the outer tube, the threaded rod is annularly arranged in the inner wall of the outer tube, a thread is arranged on one end of the threaded rod close to the outer side of the outer tube, a nut is threadedly sleeved on the outer end of the threaded rod, a spring is sleeved on one end of the threaded rod close to the inner side of the outer tube, an arc-shaped pressure plate is fixedly connected to one end of the threaded rod away from the nut, and the threaded rods are arranged axially at equal intervals on the outer side of the arc-shaped pressure plate.

[0006] Preferably, the outer wall of the inner tube is fixedly sleeved with an inner fastening layer, the outer wall of the inner fastening layer is fixedly sleeved with a tough layer, tough rods are evenly arranged in an annular shape inside the tough layer, and the outer wall of the tough layer is fixedly sleeved with an outer fastening layer.

[0007] Preferably, a heat-insulating layer is fixedly connected to the side wall of the outer fastening layer.

[0008] Preferably, a fixing block is fixedly connected to the side wall of the outer tube, and the fixing blocks are evenly distributed along the outer wall of the outer tube. Both ends of the spring are fixedly connected to the inner wall of the outer tube and the upper end surface of the arc-shaped pressure plate respectively.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] 1. By rotating the nut, the spring is compressed, and the spring reacts with the arc pressure plate, so that the arc pressure plate clamps and fixes the external fastening layer. By setting a plurality of threaded rods to connect the arc pressure plate together, when one part of the pipeline is subjected to external pressure, the pressure is dispersed on the arc pressure plate, thereby improving the pressure resistance of the pipeline, eliminating the linear cracking phenomenon when the pipe is subjected to external force impact or heavy pressure, and avoiding the pipeline from being ruptured due to stress.

[0011] 2. The spring extrude the arc pressure plate, and the arc pressure plate extrude the outer fastening layer and the inner fastening layer to fix the shape of the softened inner tube. The toughness layer makes the inner tube evenly stressed, and the toughness of the inner fastening layer is improved through the toughness layer, so that the inner tube will not soften and deform, and the pressure resistance of the water pipe is improved, avoiding rupture under the impact of water pressure in the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a front sectional structural schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the side structure of the utility model.

[0015] In the figure: 1. outer tube; 2. arc pressure plate; 3. inner tube; 4. inner fastening layer; 5. spring; 6. threaded rod; 7. nut; 8. toughness layer; 9. outer fastening layer; 10. insulation layer; 11. fixing block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-Figure 3, a high temperature resistant PPR pipe, comprising an outer pipe 1 and an inner pipe 3, and the inner pipe 3 is coaxially arranged with the outer pipe 1, a threaded rod 6 is movably inserted on the side wall of the outer pipe 1, and the threaded rod 6 is arranged in a ring in the inner wall of the outer pipe 1, and a thread is arranged on the end of the threaded rod 6 close to the outer side of the outer pipe 1, and the outer end of the threaded rod 6 is threadedly sleeved with a nut 7, and the end of the threaded rod 6 close to the inner side of the outer pipe 1 is sleeved with a spring 5, and the end of the threaded rod 6 away from the nut 7 is fixedly connected with an arc pressure plate 2, and the threaded rod 6 is arranged at equal intervals along the axial direction on the outer side of the arc pressure plate 2, and the nut 7 is rotated, and the spring 5 is compressed by force, and the spring 5 reacts the arc pressure plate 2, so that the arc pressure plate 2 clamps and fixes the external fastening layer 9, and when one part of the pipeline is subjected to external pressure by arranging a plurality of threaded rods 6 to jointly connect the arc pressure plate 2, the pressure is dispersed on the arc pressure plate 2, thereby improving the pressure resistance of the pipeline, eliminating the linear cracking phenomenon when the pipe is subjected to external force impact or heavy pressure, and avoiding the pipeline from being ruptured by force;

[0018] The outer wall of the inner tube 3 is fixedly sleeved with an inner fastening layer 4, and the outer wall of the inner fastening layer 4 is fixedly sleeved with a toughness layer 8. Toughness rods are evenly arranged in an annular shape in the toughness layer 8, and the outer wall of the toughness layer 8 is fixedly sleeved with an outer fastening layer 9. When the inner tube 3 is softened by long-term heat, the spring 5 squeezes the arc pressure plate 2, and the arc pressure plate 2 squeezes the outer fastening layer 9 and the inner fastening layer 4 to fix the softened inner tube 3 in shape. The toughness layer 8 makes the inner tube 3 evenly stressed, and the toughness of the inner fastening layer 4 is improved by the toughness layer 8, so that the inner tube 3 will not soften and deform, and the pressure resistance of the water pipe is improved, and it is avoided to rupture under the impact of the water pressure in the pipe;

[0019] The side wall of the outer fastening layer 9 is fixedly connected with an insulation layer 10. The insulation layer 10 reduces the effect of low temperature on the toughness of the inner tube 3 in winter and avoids the reduction of the service life due to the large temperature difference between the inside and outside of the inner tube 3.

[0020] A fixing block 11 is fixedly connected to the side wall of the outer tube 1, and the fixing blocks 11 are evenly distributed along the outer wall of the outer tube 1. The two ends of the spring 5 are respectively fixedly connected to the inner wall of the outer tube 1 and the upper end surface of the arc-shaped pressure plate 2. The fixing block 11 reduces the contact surface between the outer tube 1 and the outside world, improves the wear resistance of the outer tube 1, and avoids damage to the outer tube 1 due to friction with the outside world.

[0021] Working principle: Rotate the nut 7, the spring 5 is compressed, and the spring 5 reacts on the arc-shaped pressing plate 2, so that the arc-shaped pressing plate 2 clamps and fixes the external fastening layer 9. By setting a plurality of threaded rods 6 to connect the arc-shaped pressing plate 2 together, when one part of the pipeline is subjected to external pressure, the pressure is dispersed on the arc-shaped pressing plate 2, thereby improving the pressure resistance of the pipeline, eliminating the linear cracking phenomenon when the pipe is subjected to external force impact or heavy pressure, and avoiding the pipeline from being broken by force;

[0022] When the inner tube 3 is softened by long-term heat, the spring 5 squeezes the arc pressure plate 2, and the arc pressure plate 2 squeezes the outer fastening layer 9 and the inner fastening layer 4 to fix the shape of the softened inner tube 3. The toughness layer 8 makes the inner tube 3 evenly stressed, and the toughness of the inner fastening layer 4 is improved by the toughness layer 8, so that the inner tube 3 will not soften and deform, the pressure resistance of the water pipe is improved, and the rupture under the impact of the water pressure in the pipe is avoided.

Claims

1. A high temperature resistant PPR pipe, comprising an outer pipe (1) and an inner pipe (3), wherein the inner pipe (3) and the outer pipe (1) are coaxially arranged, characterized in that: A threaded rod (6) is movably inserted into the side wall of the outer tube (1), and the threaded rod (6) is arranged in a ring in the inner wall of the outer tube (1). A thread is provided on one end of the threaded rod (6) close to the outer side of the outer tube (1), and a nut (7) is sleeved on the outer end of the threaded rod (6). A spring (5) is sleeved on one end of the threaded rod (6) close to the inner side of the outer tube (1), and an end of the threaded rod (6) away from the nut (7) is fixedly connected to an arc-shaped pressure plate (2). The threaded rods (6) are arranged at equal intervals along the axial direction on the outer side of the arc-shaped pressure plate (2).

2. A high temperature resistant PPR pipe according to claim 1, characterized in that: The outer wall of the inner tube (3) is fixedly sleeved with an inner fastening layer (4), the outer wall of the inner fastening layer (4) is fixedly sleeved with a tough layer (8), tough rods are evenly arranged in an annular shape inside the tough layer (8), and the outer wall of the tough layer (8) is fixedly sleeved with an outer fastening layer (9).

3. A high temperature resistant PPR pipe according to claim 2, characterized in that: The outer side wall of the outer fastening layer (9) is fixedly sleeved with a thermal insulation layer (10).

4. The high temperature resistant PPR pipe according to claim 1, characterized in that: A fixing block (11) is fixedly connected to the side wall of the outer tube (1), and the fixing blocks (11) are evenly distributed along the outer wall of the outer tube (1). The two ends of the spring (5) are respectively fixedly connected to the inner wall of the outer tube (1) and the upper end surface of the arc-shaped pressure plate (2).

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