Anti-freezing composite thermal insulation pipe

Abstract

The utility model discloses an anti-freezing composite heat preservation pipe which comprises an outer pipe and an inner pipe located in the outer pipe. A positioning bracket for supporting the inner pipe is arranged between the outer pipe and the inner pipe; the positioning support can be clamped on the inner pipe, a heat tracing device is arranged on the hollow part in the heat conduction pipe and used for heating liquid in the inner pipe, and one end of the heat tracing device is connected with an external energy supply device for supplying energy; a heat preservation layer is filled between the outer pipe and the inner pipe. The heat tracing device has the advantages that the heat tracing device is used for heating liquid conveyed in the pipeline, the temperature of the liquid in the pipeline can be rapidly increased, the heat tracing device and the heat preservation layer complement each other, the problem that the pipeline is frozen in severe cold weather is solved, and frost cracking of the pipeline can be prevented.

Description

Technical Field

[0001] The present application relates to the technical field related to pipelines, and in particular to an antifreeze composite insulation pipe. Background Art

[0002] Severe winter weather can easily cause widespread freezing and cracking of water pipes, disrupting water supply and seriously affecting the normal lives of community residents and the normal operation of social production. Pipe cracking also causes significant waste of water resources, property damage, environmental pollution, fire safety, and electrical safety hazards.

[0003] In the field of pipeline antifreeze, the most common practice at present is to use traditional insulation materials such as rock wool, aluminum silicate wool, rubber and plastic wool to wrap or glue the pipeline for insulation and antifreeze, and then use galvanized iron or aluminum sheet as the outer layer protection of the pipeline.

[0004] Although existing technologies and solutions can provide a certain insulation effect, phenomena such as pipe freezing and cracking will still often occur in severe cold environments. The reasons are: ① The thermal conductivity of traditional insulation materials is high: the thermal conductivity of rock wool and aluminum silicate wool is 0.05~0.07W / (mK), and the thermal conductivity of rubber and plastic wool is 0.034~0.045W / (mK). The higher the thermal conductivity, the worse the antifreeze and thermal insulation performance. ② The construction technology is backward: the construction is very random, the insulation material is difficult to wrap tightly, and it is easy to debond. The inner pipe and the transported liquid at the place where the wrapping is not tight or debonding are not blocked from heat conduction to the low temperature environment, which is also one of the reasons for the freezing and cracking of water pipes. ③ Without effective heat energy supplement, it is difficult to withstand long-term severe cold weather. Summary of the Invention

[0005] The purpose of this application is to provide an antifreeze composite insulation pipe to solve the problem of freezing and cracking of pipes in severe cold weather in the prior art.

[0006] An antifreeze composite thermal insulation pipe comprises an outer pipe and an inner pipe located in the outer pipe;

[0007] A positioning bracket for supporting the inner tube is provided between the outer tube and the inner tube;

[0008] The positioning bracket can be engaged with the inner tube, and the positioning bracket includes a contact end, a supporting end and a guide end;

[0009] The contact surface between the contact end and the inner tube is arc-shaped, and an opening is provided on the contact end;

[0010] The contact end is provided with several supporting ends along the outer side of the circumference, and the supporting ends can provide support from the outer tube to the inner tube;

[0011] The two guide ends are respectively arranged on both sides of the opening to provide guidance and support for the positioning bracket to be assembled on the inner tube;

[0012] A heat conducting pipe matching the curvature of the inner pipe is arranged along the outer wall of the inner pipe, and the size of the heat conducting pipe matches the size of the opening, and the interior of the heat conducting pipe is hollowed out;

[0013] The hollowed portion of the heat conducting tube is provided with a heating device, which is used to heat the liquid in the inner tube. One end of the heating device is connected to an external energy supply device for energy supply;

[0014] A thermal insulation layer is filled between the outer tube and the inner tube.

[0015] Its beneficial effects are: the positioning bracket can make the outer pipe and the inner pipe in a concentric circle, so that the thickness of the insulation layer is balanced, the heating device can heat the liquid transported in the inner pipe, and the insulation layer is used to isolate the inner pipe from the external environment, playing a role of temperature insulation, solving the problem of pipeline freezing in severe cold weather, and preventing the pipeline from freezing and cracking.

[0016] In some embodiments, a temperature measuring probe is further provided on the inner tube, and the temperature measuring probe is used to detect the temperature of the liquid in the inner tube.

[0017] In some embodiments, one end of the temperature probe is connected to a control device, which is connected to an energy supply device. The control device can receive temperature data measured by the temperature probe to control the output power of the energy supply device.

[0018] Its beneficial effect is: by controlling the output power of the energy supply device through the control device, the heating device is kept in a heating state, ensuring that the temperature of the liquid transported in the pipeline is always above the freezing point. The above scheme complements the insulation layer, which can solve the problem of pipeline freezing in severe cold weather and prevent pipeline freezing and cracking.

[0019] In some embodiments, a reinforcing rib is provided between the supporting end and the contact end, and a reinforcing rib is provided between the guiding end and the contact end.

[0020] The beneficial effect is that the reinforcing ribs improve the structural stability and support strength of the positioning bracket.

[0021] In some embodiments, a protrusion is provided on each side of the two guide ends away from the opening, and the two protrusions can be tied by winding wire.

[0022] The beneficial effect is that when the positioning bracket engaged on the inner tube needs to be further fixed, wires can be wrapped around the two protrusions on the two guide ends to tighten them, so as to prevent the positioning bracket from being displaced.

[0023] In some embodiments, the end of the support end that contacts the inner wall of the outer tube has an arc that matches the inner wall of the outer tube.

[0024] The beneficial effects are: on the one hand, it can prevent the inner wall of the outer tube from being scratched or scratched due to the mismatch between the shape and the end where the support end contacts the inner wall of the outer tube; on the other hand, it can improve the stability of the positioning bracket so that the positioning bracket can be evenly stressed.

[0025] In some embodiments, the end of the guide end that contacts the inner wall of the outer tube has an arc that matches the inner wall of the outer tube.

[0026] The beneficial effects are: on the one hand, it can prevent the inner wall of the outer tube from being scratched or scratched due to the mismatch between the shape and the end where the guide end contacts the inner wall of the outer tube; on the other hand, it can improve the stability of the positioning bracket, especially the stability of the guide end position.

[0027] In some embodiments, the insulation layer is made of rigid polyurethane foam.

[0028] Its beneficial effects are: rigid polyurethane foam is a material with excellent antifreeze and thermal insulation properties, which can isolate the inner pipe from the temperature of the surrounding environment, resist severe cold to the greatest extent, and delay the impact of the low temperature environment on the inner pipe and the liquid transported therein; in addition, when the heating device is heating, the insulation layer can provide insulation, minimizing the loss of heat energy as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a perspective view of the structure of this application.

[0031] Figure 2 This is a perspective view of the structure of this application.

[0032] Figure 3 This is a structural diagram of the positioning bracket for this application.

[0033] Description of the reference numerals in the accompanying drawings:

[0034] 1. Outer tube; 2. Inner tube; 3. Positioning bracket; 4. Heat conducting tube; 5. Insulation layer; 6. Temperature measuring probe; 7. Heating device; 8. Control device; 31. Contact end; 32. Support end; 33. Guide end; 34. Reinforcement rib; 35. Protrusion; 311. Opening. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application more clear, the application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are part of the embodiments of this application, rather than all of the embodiments, and are only used to explain this application and are not intended to limit this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "two ends", "both sides", "bottom", "top", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this application. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary", etc. are used for descriptive purposes only and can be simply used to more clearly distinguish different components, but cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application in specific contexts.

[0038] like Figures 1 to 3 As shown, Example 1:

[0039] An antifreeze composite thermal insulation pipe comprises an outer pipe 1 and an inner pipe 2 located in the outer pipe 1;

[0040] A positioning bracket 3 is provided between the outer tube 1 and the inner tube 2 for supporting the inner tube 2; the positioning bracket is preferably made of plastic;

[0041] The positioning bracket 3 can be engaged with the inner tube 2. The positioning bracket 3 includes a contact end 31, a support end 32, and a guide end 33. In specific assembly and use, several positioning brackets 3 can be engaged with the inner tube 2 along the length direction of the inner tube 2.

[0042] The contact surface of the contact end 31 and the inner tube 2 is arc-shaped, and an opening 311 is provided on the contact end 31;

[0043] The contact end 31 is provided with a plurality of support ends 32 along the outer side of the circumference direction. The support ends 32 can provide support from the outer tube 1 to the inner tube 2.

[0044] The two guide ends 33 are respectively provided on both sides of the opening 311 to provide guidance for the positioning bracket 3 to be assembled on the inner tube 2;

[0045] A heat conducting tube 4 matching the curvature of the inner tube 2 is provided along the outer wall thereof, and the size of the heat conducting tube 4 matches the size of the opening 311, and the interior of the heat conducting tube 4 is hollowed out. It should be noted here that the heat conducting tube 4 matching the curvature of the inner tube 2 is provided on the outer wall thereof, which can increase the contact area between the outer wall of the inner tube 2 and the heat conducting tube 4 as much as possible, so as to facilitate better heat conduction of the heat conducting tube 4. On the other hand, the increase in the contact area can also increase the positioning stability of the heat conducting tube at the opening 311, and is not prone to deviation.

[0046] The hollow portion of the heat conducting tube 4 is provided with a heating device 7, which is used to heat the liquid in the inner tube 2. One end of the heating device 7 is connected to an external energy supply device for energy supply;

[0047] A heat-insulating layer 5 is filled between the outer tube 1 and the inner tube 2 .

[0048] The heat conducting pipe 4 is preferably a special-shaped wire threading pipe.

[0049] The heating device 7 is preferably an electric heating tape, and the energy supply device is preferably a power supply.

[0050] After a failure occurs, the heating device 7 can be replaced as needed.

[0051] The positioning bracket 3 can make the outer pipe 1 and the inner pipe 2 in concentric circles, so that the thickness of the insulation layer 5 is balanced. The heating device 7 can heat the liquid transported in the inner pipe 2 so that its temperature is always above the freezing point. The insulation layer 5 is used to isolate the inner pipe 2 from the external environment, playing a role of temperature isolation, and ultimately overcomes the phenomenon of pipe freezing and cracking in severe cold weather, thereby ensuring water supply safety.

[0052] Preferably, a reinforcing rib 34 is provided between the supporting end 32 and the contact end 31 for strengthening the fixation between the two.

[0053] Preferably, a protrusion 35 is provided on each side of the two guide ends 33 away from the opening 311 , and the two protrusions 35 can be tied together by winding wire.

[0054] Preferably, the end of the support end 32 that contacts the inner wall of the outer tube 1 has an arc that matches the inner wall of the outer tube 1 .

[0055] Preferably, the end of the guide end 33 that contacts the inner wall of the outer tube 1 has an arc that matches the inner wall of the outer tube 1 .

[0056] Preferably, the insulation layer 5 is made of rigid polyurethane foam, and the foam has a closed-cell structure and a density of 30-60 kg / m 3 , thermal conductivity 0.016~0.024W / (mK).

[0057] The rigid polyurethane foam with a closed-cell structure is a material with excellent antifreeze and thermal insulation properties. It can isolate the temperature of the external environment, resist severe cold to the greatest extent, and delay the impact of the low temperature environment on the inner pipe 2 and the liquid transported therein; in addition, when the heating device 7 is heating, the insulation layer 5 can provide insulation, thereby minimizing the loss of heat energy as much as possible.

[0058] The rigid polyurethane foam insulation layer 5 is obtained by a tube-in-tube foaming process, that is, after assembling the outer tube 1, inner tube 2, positioning bracket 3 and other components, the rigid polyurethane foam material is injected into the cavity between the inner tube 2 and the outer tube 1 for foaming.

[0059] It should be noted that Example 1 is mainly used in areas with relatively mild winter climates (short periods of sub-zero temperatures). The rigid polyurethane foam insulation layer 5 resists short-term sub-zero temperatures to achieve the purpose of antifreeze. The heating device 7 is used to cope with rare extremely cold weather. When the pipe is frozen, the heating device 7 heats it to achieve the purpose of thawing.

[0060] Example 2:

[0061] On the basis of the first embodiment, a temperature measuring probe 6 is further provided on the inner tube 2 , and the temperature measuring probe 6 is used to detect the temperature of the liquid in the inner tube 2 . The temperature measured by the temperature measuring probe 6 can be read by the control device 8 .

[0062] One end of the temperature probe 6 is connected to a control device 8 , which is connected to an energy supply device. The control device 8 can receive temperature data measured by the temperature probe 6 to control the output of the energy supply device.

[0063] The control device 8 is preferably an intelligent temperature control device.

[0064] It should be emphasized that the second embodiment is mainly used in areas with severe winter climates, and its purpose is different from that of the first embodiment. The main purpose of the second embodiment is to prevent pipelines from freezing.

[0065] Preferably, the distance between the temperature measuring probe 6 and the heat conducting tube 4 is generally 1 to 2 cm.

[0066] The temperature measuring probe 6 is preferably a high-precision temperature measuring probe 6 .

[0067] In the above embodiment, the inner tube 2 is preferably a plastic tube or a metal tube, which is mainly used to transport liquids, such as but not limited to domestic and production water; the outer tube 1 is preferably a plastic tube or a metal tube, which mainly has the functions of flame retardancy, UV protection, aging resistance, corrosion resistance, protection against external force damage, and enhanced hardness.

[0068] The start and stop temperatures of control device 8 are set based on the temperature measured by temperature probe 6 and the freezing point of the liquid transported by inner tube 2 (liquid freezing point < start temperature < stop temperature). Heat tracing device 7 only needs to provide a small amount of heat energy to inner tube 2 and the transported liquid to keep the liquid temperature above its freezing point, thus ensuring that the transported liquid will not freeze. Simultaneously, the rigid polyurethane foam insulation layer 5 firmly "locks" the added heat energy with the heat energy of inner tube 2, allowing it to be fully utilized to raise the temperature of the transported liquid, thereby preventing heat loss and reducing electricity consumption, achieving energy-saving effects.

[0069] The following examples illustrate this:

[0070] If the liquid transported by the inner tube 2 is water, the freezing point of water is 0°C. The starting temperature of the control device 8 can be set to 1°C and the stopping temperature to 5°C. When the temperature measured by the temperature probe 6 is <1°C, the control device 8 will control the energy supply device to automatically start to make the heating device 7 work. The heating device 7 heats up rapidly until the temperature measured by the temperature probe 6 is >5°C. The control device 8 controls the energy supply device to stop output, and the heating device 7 automatically stops working. This cycle is repeated. Under the joint action of the rigid polyurethane foam insulation layer 5, the temperature of the water transported by the inner tube 2 is always above its freezing point of 0°C, thereby achieving the purpose of anti-freezing.

[0071] The above descriptions are merely some embodiments of the present application and are intended to illustrate the technical solution of the present application, not to limit it. It should be understood that those skilled in the art may make improvements or substitutions based on the above description without departing from the inventive concept of the present application, and all such improvements and substitutions shall fall within the scope of protection of the appended claims of the present application. In such cases, all details may be replaced with equivalent elements, and the materials, shapes, and dimensions may be arbitrary.

Claims

1. An antifreeze composite thermal insulation pipe, characterized in that: It comprises an outer tube (1) and an inner tube (2) located in the outer tube (1); A positioning bracket (3) for supporting the inner tube (2) is provided between the outer tube (1) and the inner tube (2); The positioning bracket (3) can be engaged with the inner tube (2), and the positioning bracket (3) comprises a contact end (31), a supporting end (32), and a guide end (33); The surface where the contact end (31) contacts the inner tube (2) is arc-shaped, and an opening (311) is provided on the contact end (31); The contact end (31) is provided with a plurality of support ends (32) on the outside in the circumferential direction, and the support ends (32) are capable of providing support from the outer tube (1) toward the inner tube (2); The two guide ends (33) are respectively arranged on both sides of the opening (311) and are used to provide guidance and support for the positioning bracket (3) to be assembled on the inner tube (2); A heat conducting pipe (4) matching the curvature of the inner pipe (2) is provided along the outer wall of the inner pipe (2), and the size of the heat conducting pipe (4) matches the size of the opening (311), and the interior of the heat conducting pipe (4) is hollowed out; A heating device (7) is provided in the hollowed portion of the heat conducting tube (4), and the heating device (7) is used to heat the liquid in the inner tube (2). One end of the heating device (7) is connected to an external energy supply device, and the energy supply device is used to supply energy to the heating device (7); A heat-insulating layer (5) is filled between the outer tube (1) and the inner tube (2).

2. The antifreeze composite thermal insulation pipe according to claim 1, characterized in that: A temperature measuring probe (6) is also provided on the inner tube (2), and the temperature measuring probe (6) is used to detect the temperature of the liquid in the inner tube (2).

3. The antifreeze composite thermal insulation pipe according to claim 2, characterized in that: One end of the temperature measuring probe (6) is connected to a control device (8), and the control device (8) is connected to an energy supply device. The control device (8) can receive temperature data measured by the temperature measuring probe (6) to control the output power of the energy supply device.

4. The antifreeze composite thermal insulation pipe according to claim 1, characterized in that: A reinforcing rib (34) is provided between the supporting end (32) and the contact end (31), and a reinforcing rib (34) is provided between the guiding end (33) and the contact end (31).

5. The antifreeze composite thermal insulation pipe according to claim 1, characterized in that: A protrusion (35) is provided on each side of the two guide ends (33) away from the opening (311), and the two protrusions (35) can be fastened by winding wires.

6. The antifreeze composite thermal insulation pipe according to claim 1, characterized in that: The end of the support end (32) that contacts the inner wall of the outer tube (1) has an arc that matches the inner wall of the outer tube (1).

7. The antifreeze composite thermal insulation pipe according to claim 1, characterized in that: The end of the guide end (33) that contacts the inner wall of the outer tube (1) has an arc that matches the inner wall of the outer tube (1).

8. The antifreeze composite thermal insulation pipe according to claim 1, characterized in that: The material of the thermal insulation layer (5) is hard polyurethane foam.

Images