Water supply pipeline with heat preservation monitoring function

Abstract

The utility model discloses a water supply pipeline with heat preservation monitoring, which comprises an outer protective layer, a composite reinforcing layer and a lining layer, the outer protective layer and the composite reinforcing layer are sequentially sleeved on the lining layer, a plurality of heating cables are arranged in the lining layer, the plurality of heating cables are uniformly arranged along the circumferential direction of the lining layer, and the heating cables are connected with the outer protective layer and the composite reinforcing layer. And a monitoring optical cable is spirally wound on the outer wall of the composite enhancement layer. Water in the pipeline is kept at the normal temperature of 10-20 DEG C through heating of the heating cable, the ice blockage phenomenon is avoided, the temperature of the lining layer can be monitored in real time through the monitoring optical cable, then the water temperature in the pipeline is indirectly monitored, and rapid and accurate positioning of a fracture point can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pipe monitoring technical field especially a water supply pipeline with heat preservation monitoring. BACKGROUND

[0002] In the high cold region, the average temperature can be as low as below -20 DEG C in winter (December-February), and the temperature can be even lower in the extreme case, the temperature can be increased in the daytime when the sunlight is sufficient, but the temperature can be obviously decreased at night, and the temperature difference range is relatively large within a day. The water supply pipeline can be often frozen and blocked by ice, and it is difficult to prevent the ice blockage and to quickly and accurately position the frozen position. SUMMARY

[0003] To solve the above problems, the utility model adopts the technical scheme that:

[0004] A water supply pipeline with heat preservation monitoring, comprising an outer protective layer, a composite reinforcing layer and an inner lining layer, the outer protective layer and the composite reinforcing layer are sequentially sleeved on the inner lining layer, a plurality of heating cables are arranged in the inner lining layer, the plurality of heating cables are uniformly arranged along the circumferential direction of the inner lining layer, and the outer wall of the composite reinforcing layer is spirally wound with a monitoring optical cable.

[0005] Further, the inner lining layer is made of heat-resistant polyethylene, and the wall thickness of the inner lining layer is 5-80mm.

[0006] Further, the composite reinforcing layer is made of glass fiber reinforced polyethylene, and the wall thickness of the composite reinforcing layer is 5-10mm.

[0007] Further, the outer protective layer is made of heat-resistant polyethylene.

[0008] Further, the outer protective layer is sleeved with a heat preservation layer.

[0009] Further, the heating cable is a carbon fiber or an alloy resistance wire.

[0010] The utility model has the advantages that:

[0011] 1. The inner lining layer is made of heat-resistant polyethylene, which has the advantages of smooth surface and small fluid resistance. Compared with the existing steel pipe water supply pipeline, the inner wall of the inner lining layer is smooth, does not scale and wax, and can ensure the stability of the flow after long-term use. The inner lining layer with a smaller diameter can meet or even exceed the flow of a steel pipe with a larger diameter.

[0012] 2. The water in the pipeline is kept at a normal temperature of 10 DEG C-20 DEG C by heating the heating cable, so as to avoid the ice blockage phenomenon.

[0013] 3, the monitoring optical cable can monitor the temperature of the inner lining layer in real time, thereby indirectly monitoring the water temperature in the pipeline, and can also realize rapid and accurate positioning of the rupture point, thereby improving the pipeline repair efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required to be used in the embodiments or prior art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0016] Figure 1 It is a structural schematic diagram of embodiment 1;

[0017] Figure 2 It is a sectional view of embodiment 2;

[0018] Figure 3 It is a temperature monitoring state diagram;

[0019] In the drawings

[0020] 1, outer protective layer; 2, composite reinforcing layer; 3, inner lining layer; 4, heating cable; 5, monitoring optical cable; 6, thermal insulation layer. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present disclosure.

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood as the usual meanings understood by those skilled in the art to which the present disclosure belongs. The terms "first", "second" and the like used in the present disclosure do not represent any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and the like mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] refer to Figure 1 Embodiment 1 of this utility model is as follows:

[0024] A water supply pipe with heat preservation and monitoring includes an outer protective layer 1, a composite reinforcement layer 2 and an inner lining layer 3. The outer protective layer 1 and the composite reinforcement layer 2 are sequentially fitted onto the inner lining layer 3. A plurality of heating cables 4 are provided in the inner lining layer 3. The plurality of heating cables 4 are evenly arranged along the circumference of the inner lining layer 3. A monitoring optical cable 5 is spirally wound on the outer wall of the composite reinforcement layer 2.

[0025] Specifically, in actual use, water supply pipes are mostly made of steel pipes, which suffer from problems such as scaling, waxing, and corrosion after long-term use. The scale can also clog the steel pipes and reduce the flow rate. The inner lining 3 is made of heat-resistant polyethylene, which has the advantages of smooth surface and low fluid resistance. Compared with existing steel water supply pipes, the inner wall of the inner lining 3 is smooth and does not accumulate scale or wax. It can ensure stable flow rate after long-term use. The inner lining 3 with a smaller diameter can meet or even exceed the flow rate of larger diameter steel pipes.

[0026] Specifically, the heating cable 4 can be made of highly flexible materials such as carbon fiber and alloy resistance wire, which facilitates the installation and laying of water pipes. The water supply pipes can be installed by trenching and backfilling or by direct outdoor installation. However, both installation methods may involve pipe bending. Flexible carbon fiber and alloy resistance wire can ensure that the heating cable 4 will not break easily.

[0027] Specifically, the conductor diameter of the heating cable 4 is 1.12±0.001mm, the resistance is 0.01687-0.01785Ω / m, the maximum electric heating power is 30w / m, and it is powered by 380V. In cold environments, the heating cable 4 heats the inner lining layer 3 to maintain its working temperature between 30°C and 50°C. The inner lining layer 3 transfers the heat generated by the heating cable 4 to the water in the pipe through heat transfer. Considering the heat loss during heat transfer, the water in the pipe can be kept at a normal temperature of 10°C-20°C to avoid ice blockage. Of course, the inner lining layer 3 can also adjust the power of the heating cable 4 according to the actual ambient temperature. For example, when the temperature is close to the freezing point, the heating power is increased; when the temperature returns to normal, the heating is reduced or stopped to achieve energy saving.

[0028] Specifically, in order to ensure the strength of the water pipe, the composite reinforcement layer 2 is made of glass fiber reinforced polyethylene prepreg tape wound and melt-molded. The polyethylene matrix has a low density, and after being combined with glass fiber reinforcement, the overall material is lightweight and its mechanical strength is significantly improved. Its tensile strength and bending performance are close to those of metal materials, which can effectively improve the overall strength of the water pipe.

[0029] Specifically, the monitoring optical cable 5 is an optical fiber for monitoring the temperature of the inner liner 3 in real time, thereby indirectly monitoring the water temperature in the pipeline. The temperature monitoring is specifically achieved by using an existing distributed optical fiber temperature sensing system (DTS) which uses Raman effect for temperature measurement. The distributed optical fiber temperature sensing system shoots a pulsed laser into the monitoring optical cable 5, obtains backscattered light at the sending end, and analyzes the backscattered light.

[0030] When the pulsed laser is transmitted in the monitoring optical cable 5, it has inelastic collision with molecules in the medium of the monitoring optical cable 5, thereby generating Raman scattering (mainly backscattering). The distributed optical fiber temperature sensing system separates the returned scattered light into two paths, Stokes scattered light and Anti-Stokes scattered light. The wavelength of the Stokes scattered light is longer than that of the incident light, corresponding to the molecular vibration energy absorption process. The wavelength of the Anti-Stokes scattered light is shorter than that of the incident light, corresponding to the molecular vibration energy release process. The intensity ratio of the two is directly related to the temperature. The specific calculation formula is as follows:

[0031] T = C·ln(I AS / I S ),

[0032] wherein T is the temperature, I AS represents the intensity of the Anti-Stokes scattered light, I S represents the intensity of the Stokes scattered light, and C is a calibration coefficient.

[0033] In addition, the position of the scattering point is calculated by the time difference between the pulse emission and reception. The specific formula is as follows:

[0034] L = C·t / (2n),

[0035] wherein t is the time difference between the pulse emission and reception, n is the refractive index of the optical fiber, and c is the speed of the pulsed laser.

[0036] In addition, the monitoring optical cable 5 can also use the distributed optical fiber temperature sensing system to monitor whether the pipeline has a leakage, a rupture, or the like in real time. Generally, the water temperature at each position in the entire pipeline is roughly the same, as shown in FIG. 2. When the pipeline has a leakage, a rupture, or the like, the leaked water will cause the temperature around the pipeline to rise. At this time, the sudden change point of the temperature can be used to quickly and accurately locate the rupture point, thereby improving the repair efficiency of the pipeline. Figure 3

[0037] ​Specifically, the wall thickness of the inner lining layer 3 is 5-80mm, and the wall thickness of the composite reinforcing layer 2 is 5-10mm. The specific wall thickness is selected according to the actual diameter of the inner lining layer 3 and the composite reinforcing layer 2. In this utility model, the inner diameter of the inner lining layer 3 is between 20-1000mm. By selecting an appropriate wall thickness according to the actual diameter, the maximum operating pressure of the pipeline can reach 10MP, thereby improving the stability during use.

[0038] Specifically, the outer protective layer 1 is used to prevent damage to the monitoring optical cable 5 from the external environment during use. The outer protective layer 1 is made of heat-resistant polyethylene and has certain flexibility, wear resistance, impact resistance and UV resistance.

[0039] Example 2:

[0040] like Figure 2 As shown, if the external environment is too cold, an insulation layer 6 can be added on top of the outer protective layer 1. The insulation layer 6 is made of insulation materials such as polyurethane foam, which can effectively concentrate the heat lost by the heating cable 4 and reduce the heat loss rate of the heating cable 4.

[0041] The following points need to be explained:

[0042] (1) Unless otherwise defined, the same reference numerals in the embodiments and drawings of this disclosure have the same meaning.

[0043] (2) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0044] (3) For clarity, components or areas are enlarged in the drawings used to describe embodiments of the present disclosure. It will be understood that when an element is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element, or there may be an intermediate element.

[0045] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A water supply pipe with thermal retention monitoring, characterized by: The utility model relates to a kind of heating cable, including outer protective layer (1), composite reinforcing layer (2) and inner liner (3), the outer protective layer (1), composite reinforcing layer (2) are sequentially set in inner liner (3), several heating cables (4) are provided in the inner liner (3), several heating cables (4) are evenly arranged along the circumferential direction of inner liner (3), and the outer wall of the composite reinforcing layer (2) is spirally wound with monitoring optical cable (5).

2. A water supply pipe with temperature monitoring according to claim 1, characterized in that: The inner liner (3) is made of heat-resistant polyethylene, and the wall thickness of the inner liner (3) is 5-80 mm.

3. A water supply pipe with temperature monitoring according to claim 2, characterized in that: The composite reinforcing layer (2) is made of glass fiber reinforced polyethylene, and the wall thickness of the composite reinforcing layer (2) is 5-10 mm.

4. The water supply pipe with temperature monitoring according to claim 1, characterized in that: The outer protective layer (1) is made of heat-resistant polyethylene.

5. A water supply pipe with temperature monitoring according to claim 4, characterized in that: The outer protective layer (1) is sleeved with a thermal insulation layer (6).

6. The water supply pipe with temperature monitoring according to claim 1, characterized in that: The heating cable (4) is a carbon fiber or an alloy resistance wire.

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