Cooling and heating conveying pipeline and production process thereof

Abstract

The invention discloses a cold and warm conveying pipeline and a production process thereof, and belongs to the technical field of pipeline equipment, the cold and warm conveying pipeline comprises multiple sections of conveying pipelines, the adjacent conveying pipelines are communicated through expansion joints, the conveying pipelines comprise non-metal pipelines, metal pipelines are arranged outside the non-metal pipelines in a sleeving mode, and a plurality of supporting clamps are arranged outside the metal pipelines at intervals; the exterior of the supporting clip is sleeved with a decorative pipeline, and a gap formed between the metal pipeline and the decorative pipeline is filled with a heat preservation material. Due to the characteristics of the non-metal pipeline, the non-metal pipeline can generate transverse and longitudinal deformation at high temperature or low temperature, the deformation problem of the non-metal pipeline is limited, the application problem of the non-metal pipeline in the heating and ventilation industry is solved, the service life of the pipeline is prolonged, the problem of scaling in the pipeline is solved, and construction is more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline equipment, and in particular relates to a pipeline for conveying cold and warm water and a production process thereof. Background Art

[0002] Traditional indoor heating and cooling pipes often use galvanized pipes, which have the following disadvantages: 1. Poor corrosion resistance: galvanized pipes are prone to rust during long-term use, resulting in a large amount of rust inside the pipes, affecting water quality and causing intelligent control equipment to not work properly; 2. Complex construction: The connection construction of galvanized pipes is relatively complex; 3. Short service life: galvanized pipes have poor corrosion resistance and a relatively short service life, and need to be replaced regularly. Therefore, the practice of using non-metallic pipes for heating and cooling pipes has emerged, which does not cause internal corrosion, scale, short service life, and complex construction.

[0003] However, another serious problem has emerged. Due to the characteristics of non-metallic pipes, they will produce lateral and longitudinal deformation when exposed to high or low temperatures. With the use of plastic pipes over time, they will frequently expand and contract, lengthen and shorten, seriously affecting their service life, making non-metallic pipes unusable in the HVAC industry. Therefore, it is necessary to study how to limit the expansion and contraction, lengthening and shortening of the pipes to extend the service life of indoor heating and cooling pipes, which has become the key to solving the problem. Summary of the invention

[0004] The purpose of the present invention is to provide a cold and hot conveying pipe and a production process thereof to solve the deficiencies in the prior art.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0006] A pipe for conveying cold and hot water comprises a plurality of sections of conveying pipes, wherein adjacent conveying pipes are connected via expansion joints, and the conveying pipes comprise: a non-metallic pipe, a metal pipe is sheathed on the outside of the non-metallic pipe, a plurality of support clips are arranged at intervals on the outside of the metal pipe, a decorative pipe is sheathed on the outside of the support clips, and a gap formed by the metal pipe and the decorative pipe is filled with thermal insulation material.

[0007] Furthermore, both ends of the non-metallic pipe have flanges extending outward, a flange is installed between the end of the metal pipe and the flange, the flange and the end of the expansion joint are fixed by bolts, and a flange gasket is also installed between the flange and the expansion joint.

[0008] Furthermore, the distance between adjacent support clips is 1-3m.

[0009] Furthermore, the non-metallic pipe is a plastic pipe.

[0010] Furthermore, the thermal insulation material is polyurethane foam.

[0011] A production process for conveying cold and hot pipes, comprising the following steps:

[0012] S1: After the non-metallic pipe is processed and shaped, it enters the constant temperature room for low temperature treatment;

[0013] S2: Fix the metal pipe on the fixture platform, and place the platform at the rear end of the constant temperature chamber. When the temperature of the non-metallic pipe is constant and meets the requirements, pull it out from the rear end of the constant temperature chamber by the traction machine, push it into the fixture platform and insert it into the metal pipe;

[0014] S3: The metal pipe inserted into the non-metal pipe is transported to the next station through the conveying track, and a plurality of support clips are arranged at intervals outside the metal pipe;

[0015] S4: Insert the metal pipe with the support clip installed into the interior of the decorative pipe. After it is in place, seal both ends and fill the space between the metal pipe and the decorative pipe with insulation material.

[0016] S5: Connect the manufactured delivery pipeline via an expansion joint, and fix the expansion joint and the delivery pipeline via a flange.

[0017] Furthermore, in step S2, the difference between the inner diameter of the metal pipe and the outer diameter of the non-metal pipe is 0-5 mm. The non-metal pipe will shrink after cooling, and will expand after returning to room temperature, and will naturally fit tightly with the metal pipe.

[0018] The present invention provides a cooling and heating pipe and a production process thereof, which has the following advantages compared with the prior art:

[0019] The present invention has a simple structure. During processing, the non-metallic pipe is first sent to a constant temperature chamber for low-temperature treatment to shrink and deform it to the extreme. In actual use, since the conventional use environment temperature is greater than 7°C, no cold shrinkage will occur during use. After the non-metallic pipe is inserted into the metal pipe, the lateral expansion of the non-metallic pipe is limited. Therefore, when the temperature of the water flow in the pipe increases, the non-metallic pipe can only be lengthened in the axial direction. An expansion joint is provided between adjacent conveying pipes, so that the present invention can avoid the axial lengthening of the non-metallic pipe when the temperature is high, resulting in bending and deformation of the entire pipeline, thereby extending the service life of the pipeline, solving the problem of scaling in the pipeline, and making construction more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 It is a front cross-sectional view of the present invention;

[0022] Figure 2 for Figure 1 A local enlarged view at point A;

[0023] Figure 3 It is a side cross-sectional view of the present invention.

[0024] In the figure: 1-conveying pipeline, 2-expansion joint, 3-non-metallic pipeline, 4-metallic pipeline, 5-decorative pipeline, 6-flange, 7-flange, 8-flange gasket, 9-insulation material. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0026] Example 1

[0027] refer to Figure 1-3 As shown, the present invention provides a pipeline for conveying cold and warm water, including multiple sections of conveying pipelines 1, adjacent conveying pipelines 1 are connected by expansion joints 2, which are used to offset the longitudinal deformation stress of non-metallic pipelines due to temperature changes. The conveying pipeline 1 includes: non-metallic pipeline 3, the non-metallic pipeline 3 is externally sheathed with metal pipeline 4 (the two are required to fit closely, and its function is to offset the lateral deformation stress of non-metallic pipelines due to temperature changes), the external of the metal pipeline 4 is provided with a plurality of support clips, the external of the support clip is sheathed with decorative pipeline 5, the decorative pipeline plays a protective insulation layer and decorative role, and the gap formed by the metal pipeline 4 and the decorative pipeline 5 is filled with insulation material 9, which plays a role of insulation. Both ends of the non-metallic pipeline 3 extend outward with flanges 6, a flange 7 is installed between the end of the metal pipeline 4 and the flange 6, the flange 7 is fixed to the end of the expansion joint 2 by bolts, and a flange gasket 8 is also installed between the flange 6 and the expansion joint 2. The flange gasket 8 is used to improve the sealing between the conveying pipeline 1 and the expansion joint 2 to avoid water leakage at the connection. The spacing between adjacent support clips is 1-3m. The non-metallic pipe 3 is a plastic pipe. The thermal insulation material 9 is polyurethane foam.

[0028] The concept of the present invention is to offset the effect of temperature changes on the non-metallic pipe 3. When the non-metallic pipe 3 is heated, forces in both axial and radial directions will be generated. First, the diameter of the non-metallic pipe 3 will become thicker. The way to offset its force is to insert the metal pipe 4 under conditions lower than the normal temperature to withstand its expansion force; second, the non-metallic pipe 3 will become longer or shorter in the axial direction. The way to offset its force is to set an expansion joint 2 between the non-metallic pipes 3 to withstand its axial changes.

[0029] Example 2

[0030] A production process for conveying cold and hot pipes, comprising the following steps:

[0031] S1: After the non-metallic pipe 3 is processed and shaped, it enters a constant temperature chamber for low-temperature treatment, and the temperature of the constant temperature chamber is 0-15°C; in actual use, since the conventional ambient temperature is greater than 7°C, no cold shrinkage will occur during use. After the non-metallic pipe 3 is inserted into the metal pipe 4, the radial expansion of the non-metallic pipe 3 is limited.

[0032] S2: Fix the metal pipe 4 on the fixture platform, and place the platform at the rear end of the constant temperature chamber. When the temperature of the non-metallic pipe 3 is constant and meets the requirements, pull it out from the rear end of the constant temperature chamber by the traction machine, push it into the fixture platform and insert it into the metal pipe 4; the difference between the inner diameter of the metal pipe 4 and the outer diameter of the non-metallic pipe 3 is 0-5mm. The non-metallic pipe 3 will shrink after cooling, and will expand after returning to room temperature, and naturally fit tightly with the metal pipe 4.

[0033] S3: The metal pipe 4 inserted into the non-metallic pipe 3 is transported to the next workstation through the conveying track. A number of support clips are set at intervals on the outside of the metal pipe 4. The spacing between adjacent support clips is 1m. The support clips are used to make the central axis of the metal pipe 4 coincide with that of the decorative pipe 5, thereby ensuring uniform distribution of the thermal insulation material 9.

[0034] S4: Insert the metal pipe 4 with the support clip into the interior of the decorative pipe 5. After it is in place, seal both ends and fill the space between the metal pipe 4 and the decorative pipe 5 with insulation material 9 to reduce the loss of cold and heat in the pipe.

[0035] S5: The manufactured conveying pipeline 1 is connected through the expansion joint 2, and the expansion joint 2 and the conveying pipeline 1 are fixed by the flange 7. By arranging the expansion joint 2 between adjacent conveying pipelines 1, the present invention can avoid the axial lengthening of the non-metallic pipeline 3 causing the bending and deformation of the entire pipeline when the temperature is high, thereby extending the service life of the pipeline.

[0036] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0037] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0038] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A pipeline for conveying cold and hot water, characterized in that: The invention comprises a plurality of sections of conveying pipelines (1), wherein adjacent conveying pipelines (1) are connected via expansion joints (2), and the conveying pipeline (1) comprises: a non-metallic pipeline (3), a metal pipeline (4) is sheathed on the outside of the non-metallic pipeline (3), a plurality of support clips are arranged at intervals on the outside of the metal pipeline (4), a decorative pipeline (5) is sheathed on the outside of the support clips, and a gap formed by the metal pipeline (4) and the decorative pipeline (5) is filled with a heat-insulating material (9).

2. A cold and hot water transport pipe according to claim 1, characterized in that: Both ends of the non-metallic pipe (3) are provided with flanges (6) extending outwards, a flange (7) is installed between the end of the metal pipe (4) and the flange (6), the flange (7) and the end of the expansion joint (2) are fixed by bolts, and a flange gasket (8) is also installed between the flange (6) and the expansion joint (2).

3. A cold and hot water transport pipe according to claim 1, characterized in that: The distance between adjacent support clips is 1-3m.

4. A cold and hot water transport pipe according to claim 1, characterized in that: The non-metallic pipe (3) is a plastic pipe.

5. A cold and hot water transport pipe according to claim 1, characterized in that: The thermal insulation material (9) is made of polyurethane foam.

6. A production process for conveying cold and hot pipes, characterized in that: The steps include: S1: After the non-metallic pipe (3) is processed and shaped, it enters a constant temperature chamber for low temperature treatment; S2: Fix the metal pipe (4) on the fixture platform, and place the platform at the rear end of the constant temperature chamber. When the temperature of the non-metal pipe (3) is constant and meets the requirements, pull it out from the rear end of the constant temperature chamber by a traction machine, push it into the fixture platform and insert it into the metal pipe (4); S3: transporting the metal pipe (4) inserted into the non-metal pipe (3) to the next workstation via a transport track, and arranging a plurality of support clips at intervals outside the metal pipe (4); S4: inserting the metal pipe (4) equipped with the support clip into the interior of the decorative pipe (5), sealing both ends after it is in place, and filling the space between the metal pipe (4) and the decorative pipe (5) with a heat-insulating material (9); S5: connecting the manufactured delivery pipeline (1) via the expansion joint (2), and fixing the expansion joint (2) and the delivery pipeline (1) via a flange (7).

7. The production process of a cold and hot conveying pipe according to claim 6, characterized in that: The difference between the inner diameter of the metal pipe (4) and the outer diameter of the non-metal pipe (3) in step S2 is 0-5 mm. The non-metal pipe (3) will shrink after cooling, and will expand after returning to room temperature, and naturally fit tightly with the metal pipe (4).

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