High-temperature-resistant and corrosion-resistant heat supply pipeline

Abstract

The heat supply pipeline comprises a pipeline body, a first heat insulation layer and a heat-resistant anti-corrosion coating are sequentially and fixedly arranged on the inner side of the pipeline body, and a second heat insulation layer, a buffer layer and an anti-corrosion layer are sequentially and fixedly connected to the outer side of the pipeline body. According to the high-temperature-resistant and corrosion-resistant heat supply pipeline, the first heat insulation layer and the heat-resistant and corrosion-resistant coating are sequentially and fixedly arranged on the inner side of the pipeline body, the heat-resistant and corrosion-resistant coating can improve the high-temperature-resistant and corrosion-resistant performance of the pipeline body, and the service life of the pipeline is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heating pipes, and more specifically, to a high-temperature-resistant and corrosion-resistant heating pipe. Background Art

[0002] Heating pipes are piping systems used to transmit heat energy. Their primary function is to transport heat generated by boilers to indoor heating equipment via heat media such as steam or hot water, thereby meeting production and living needs. These piping systems can be categorized as steam pipes and hot water pipes, depending on the media they carry. They are further categorized as low-pressure, medium-pressure, and high-pressure pipes, depending on operating pressure. Furthermore, heating pipes can be installed indoors or outdoors, and thermal expansion and contraction due to temperature fluctuations are a significant characteristic of heating pipes.

[0003] Patent document CN218914010U discloses a high-insulation heating pipe, including a heating pipe body, two-end sealing components installed on the heating pipe body, and pressure-bearing protection components connected to the two-end sealing components; a high-insulation external protection component is provided on the outside of the pressure-bearing protection component, a cylindrical protective pressure-resistant outer sleeve is provided inside the pressure-bearing protection component, a transverse high-temperature protective outer sleeve is provided inside the high-insulation external protection component, and a circular sealing elastic inner clamping ring is provided inside the two-end sealing components. The heating pipe can play a certain pressure-resistant sealing protection role through the two-end sealing components and the pressure-bearing protection components, and can play a double insulation protection effect through the high-insulation external protection component.

[0004] At present, common heating pipes have poor high temperature resistance and corrosion resistance, which will result in a short service life of the heating pipes.

[0005] Therefore, it is necessary to propose a heating pipe that is resistant to high temperature and corrosion to solve the problems existing in the prior art. Utility Model Content

[0006] The Summary of the Utility Model introduces a series of simplified concepts that will be further described in the Detailed Description of the Utility Model. The Summary of the Utility Model of the Utility Model does not intend to limit the key features and essential technical features of the claimed technical solution, nor does it intend to determine the scope of protection of the claimed technical solution.

[0007] In order to solve the above problems, the utility model provides a high-temperature resistant and corrosion-resistant heating pipe, including a pipe body, the inner side of which is fixedly provided with a first thermal insulation layer and a heat-resistant and anti-corrosion coating in sequence, and the outer side of the pipe body is fixedly connected with a second thermal insulation layer, a buffer layer and an anti-corrosion layer in sequence.

[0008] Preferably, the heat-resistant and anti-corrosion coating is an organic silicon heat-resistant and anti-corrosion coating.

[0009] Preferably, a protective layer is fixedly provided on the outer side of the anti-corrosion layer.

[0010] Preferably, a reinforcement layer is provided inside the second heat-insulating layer, and the reinforcement layer has a mesh structure.

[0011] Preferably, the mesh structure of the reinforcement layer is a steel mesh.

[0012] Preferably, the mesh structure of the reinforcement layer is a polyester fiber mesh, a polyamide fiber mesh or a glass fiber mesh.

[0013] Preferably, the buffer layer includes a wavy skeleton structure, and the grooves on both sides of the skeleton structure are filled with buffer fillers.

[0014] Preferably, a buffer cavity is provided inside the buffer filler.

[0015] Preferably, the buffer filler is made of polyurethane material.

[0016] Preferably, the pipeline body uses a galvanized steel pipe.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The high-temperature and corrosion-resistant heating pipe described in the utility model has a first insulation layer and a heat-resistant and anti-corrosion coating fixedly arranged on the inner side of the pipe body in sequence. The heat-resistant and anti-corrosion coating can improve the high-temperature resistance and corrosion resistance of the pipe body and increase the service life of the pipe.

[0019] The high-temperature and corrosion-resistant heating pipes described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and will also be understood by technical personnel in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic structural diagram of the high-temperature and corrosion-resistant heating pipeline disclosed in the present utility model;

[0022] Figure 2 This is a schematic structural diagram of the second heat-insulating layer and the reinforcing layer disclosed in the present utility model;

[0023] Figure 3 This is a schematic structural diagram of the buffer layer disclosed in the present utility model;

[0024] Figure 4 This is a schematic structural diagram of the compensator disclosed in the utility model. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0026] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0027] like Figure 1-3 As shown, a high-temperature and corrosion-resistant heating pipe includes a pipe body 1, the inner side of the pipe body 1 is fixedly provided with a first thermal insulation layer 2 and a heat-resistant and anti-corrosion coating 3 in sequence, and the outer side of the pipe body 1 is fixedly connected with a second thermal insulation layer 4, a buffer layer 5 and an anti-corrosion layer 6 in sequence.

[0028] Furthermore, the heat-resistant and anti-corrosion coating 3 is a heat-resistant and anti-corrosion coating of organic silicon.

[0029] Furthermore, a protective layer 7 is fixedly provided on the outer side of the anti-corrosion layer 6 .

[0030] Furthermore, a reinforcement layer 8 is provided inside the second heat-insulating layer 4 , and the reinforcement layer 8 is a mesh structure.

[0031] Furthermore, the mesh structure of the reinforcement layer 8 is a steel mesh.

[0032] Furthermore, the mesh structure of the reinforcement layer 8 is a polyester fiber mesh, a polyamide fiber mesh or a glass fiber mesh.

[0033] Furthermore, the buffer layer 5 includes a wave-shaped skeleton structure 51 , and the grooves on both sides of the skeleton structure 51 are filled with buffer fillers 52 .

[0034] Furthermore, a buffer cavity 53 is defined inside the buffer filler 52 .

[0035] Furthermore, the buffer filler 52 is made of polyurethane material.

[0036] Furthermore, the pipe body 1 uses a galvanized steel pipe.

[0037] The working principle of the above technical solution is:

[0038] A first thermal insulation layer 2 and a heat-resistant and anti-corrosion coating 3 are fixedly arranged on the inner side of the pipeline body 1 in sequence, and a second thermal insulation layer 4, a buffer layer 5 and an anti-corrosion layer 6 are fixedly connected on the outer side of the pipeline body 1 in sequence.

[0039] The heat-resistant anti-corrosion coating 3 is an organic silicon heat-resistant anti-corrosion coating, which is formed by spraying an organic silicon heat-resistant anti-corrosion paint.

[0040] Spraying generally produces a more uniform and smoother coating surface, but the thickness and uniformity of the coating must be controlled. A coating that is too thick may result in an uneven surface, while a coating that is too thin may not provide adequate protection. To improve spraying quality, the painting environment should also be considered: ensure that the spraying environment is clean, dust-free, and draft-free. Dust and impurities in the air can affect the surface quality of the coating. Control the temperature and humidity of the spraying environment to meet the paint manufacturer's recommendations.

[0041] In order to improve the smoothness of the inner wall of the pipeline, after the paint is dried after spraying, polishing equipment can be used to polish the sprayed heat-resistant and anti-corrosion coating to reduce the resistance of the inner wall of the pipeline to the fluid in the pipeline, increase the speed of fluid flow, and reduce corrosion to the inner wall of the pipeline.

[0042] Heat-resistant anti-corrosion coatings can be selected from the market with heat-resistant temperature suitable for heat-resistant anti-corrosion coatings, and heat-resistant temperature range of 200-800 can be selected. For example, Jiunai brand silicone high-temperature resistant paint.

[0043] Before installing the insulation layer, ensure that the outer wall surface of the pipe is flat, clean, and free of impurities such as rust and oil. This helps to improve the adhesion between the insulation material and the pipe. Adhesives can be used to bond the insulation layer to the pipe body 1. The specific type of adhesive can be selected from existing general adhesives based on the material of the insulation layer, which will not be repeated here.

[0044] Joint treatment: The joints of the insulation layer should be well sealed to avoid thermal bridge effect and heat loss. Special sealing materials or tapes can be used to treat the joints.

[0045] The first insulation layer 2 and the second insulation layer 4 can be made of foam plastics such as polystyrene (EPS) or polypropylene (PP) into a cylindrical shape. Then, adhesive is applied to the surfaces connected to the pipe body. The first insulation layer 2 is placed inside the pipe body, and the second insulation layer 4 is placed on the outside of the pipe body 1. After the adhesive dries, they are fixed together. The buffer layer 5, the anti-corrosion layer 6, and the protective layer 7 can be bonded to the outside of the second insulation layer in sequence. The anti-corrosion layer 6 can be made of polytetrafluoroethylene (PTFE), ceramic material, or epoxy resin material. The protective layer 7 can be made of fiberglass composite material, high-density polyethylene material, or glass fiber cloth.

[0046] The buffer layer 5 includes a wavy skeleton structure 51. The grooves on both sides of the skeleton structure 51 are filled with buffer fillers 52. A buffer cavity 53 is defined within the buffer fillers 52. The buffer fillers 52 are made of polyurethane. The skeleton structure 51 can be stamped and formed using spring steel sheets. The skeleton structure 51 is placed in a ring-shaped mold, and the polyurethane material is squeezed into the mold. After the mold is formed, it is removed from the mold. Alternatively, tubular objects can be placed in the grooves of the skeleton structure on the mold to form a buffer cavity behind the polyurethane. When the pipeline is subjected to external impact, the skeleton structure deforms, and the buffer cavity inside the polyurethane also deforms, which can reduce the impact on the pipeline body.

[0047] Beneficial effects of the above technical solution:

[0048] The high-temperature and corrosion-resistant heating pipe described in the utility model has a first insulation layer and a heat-resistant and anti-corrosion coating fixedly arranged on the inner side of the pipe body in sequence. The heat-resistant and anti-corrosion coating can improve the high-temperature resistance and corrosion resistance of the pipe body and increase the service life of the pipe.

[0049] In one embodiment, Figure 4 As shown, a compensator 9 is provided on the high-temperature and corrosion-resistant heating pipe. The compensator 9 includes a circular compensator body 91. An annular boss 92 is provided in the middle of the inner circumferential surface of the compensator body 91. An annular groove 93 is provided on an annular surface of the annular boss 92. A compensation ring 94 is slidably arranged in the annular groove 93. A plurality of first springs 95 are arranged in an array along the circumferential direction on the bottom surface of the annular groove 93. One end of the first spring 95 is fixedly connected to the bottom surface of the annular groove 94, and the other end of the first spring 95 is fixedly connected to the end surface of the compensation ring 94 entering the annular groove. A sealing ring 96 is fixedly provided on the end surface of the compensation ring 94 extending out of the annular groove 93.

[0050] Furthermore, a sealing groove is provided on the inner wall of the compensator body 91 on one side of the annular groove 93 of the annular boss 92 , and a sealing ring 97 is provided in the sealing groove.

[0051] Furthermore, on the outer wall of the compensator body 91, one end of the annular groove 93 facing away from the annular boss 92 is fixedly provided with a first flange 98 along the circumferential direction, and a plurality of first connecting rod holes 99 are arranged in an array along the circumferential direction on the end surface of the first flange 98, a connecting rod 100 is passed through the first connecting rod hole 99, and a second flange 101 is provided at the end of the connecting rod 100 away from the first flange 98, and a second connecting rod hole 102 is provided at a position corresponding to the first connecting rod hole 99 on the second flange 101, and the same connecting rod 100 is passed through the corresponding first connecting rod hole 99 and second connecting rod hole 102, a connecting rod head 103 is fixedly provided at one end of the connecting rod 100 passing through the second flange 101, and a nut 104 is threadedly connected to one end of the connecting rod 100 passing through the first flange 98, and a second spring 105 is sleeved on the outer circumferential surface of the connecting rod 100 between the nut 104 and the first flange 98.

[0052] The principle of the above technology: When the external temperature of the heating pipe changes, due to thermal expansion and contraction, it is often necessary to install a compensator on the pipe. The existing compensators mostly use bellows. During use, the bellows need to deform to meet the thermal expansion and contraction of the heating pipe. The bellows are affected by deformation requirements and manufacturing, and the thickness is relatively thin. It is easily damaged under the action of deformation and pipeline pressure.

[0053] The compensator 9 is arranged between two adjacent heating pipes. The compensator 9 includes a compensator body 91. An annular boss 92 is provided in the middle of the inner circumferential surface of the compensator body 91. An annular groove 93 is provided on an annular surface of the annular boss 92. The inner diameter of the compensator body 91 is the same as the outer diameter of the pipe body. One end of the annular groove 93 of the compensator body 91 away from the annular boss 92 is fixedly connected to the pipe body 1 of the first pipe 11 of the two adjacent heating pipes. The compensator body 91 can be made of the same metal material as the pipe body 1, and the two can be welded together. The other end of the compensator body 91 is sleeved on the pipe body of the second pipe 12. On the outside of the compensator body 1, the sealing ring 96 on the compensator ring 94 abuts the end face of the pipe body 1 of the second pipe 12. Under the pressure of the first spring 95, it is pressed tightly against the end face of the pipe body of the second pipe 12, providing a seal. When the external temperature rises, the first and second pipes 11 and 12 expand, compressing the first spring 95 and pressing the compensator ring 94 into the annular groove. When the external temperature drops, the first and second pipes 11 and 12 contract, and the compensator ring 94 moves out of the annular groove under the pressure of the first spring, still pressing tightly against the end face of the pipe body of the second pipe. This absorbs deformation of the heating pipe when the external temperature changes. A sealing groove is provided on the inner wall where the compensator body 91 and the second pipe 12 are connected, and a sealing ring 97 is disposed in the sealing groove to enhance the sealing between the compensator body and the second pipe.

[0054] To increase the stability of the connection between the compensator and the second pipe and prevent the second pipe 12 from detaching from the compensator body 91, a first flange 98 is fixedly disposed on the outer circumference of the end of the compensator body 91 connected to the first pipe. A second flange 101 is disposed, connected to the first flange 98 via a connecting rod 100. The second flange 101 is fixedly attached to the outer circumference of the second pipe 12 and can be clamped to the second pipe 12 via a clamp. The second flange 101 and the first flange 98 are connected by a connecting rod head 103 and a nut 104 of the connecting rod 100. The function of the second spring 105 is to accommodate the relative movement of the second flange during the expansion and contraction of the first and second pipes 11, 12.

[0055] The compensator 9 described in the utility model has no bellows and can withstand greater pipeline pressure. It uses end face sealing to seal the sealing ring on the compensating ring with the end face of the pipeline body, reducing the radial size of the compensator and enabling the compensator to adapt to a smaller space.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0057] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0058] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high temperature and corrosion resistant heating pipe, characterized in that: The invention comprises a pipeline body (1), wherein a first heat insulation layer (2) and a heat-resistant anti-corrosion coating (3) are fixedly arranged on the inner side of the pipeline body (1) in sequence, and a second heat insulation layer (4), a buffer layer (5) and an anti-corrosion layer (6) are fixedly connected on the outer side of the pipeline body (1) in sequence.

2. The high temperature and corrosion resistant heating pipe according to claim 1 is characterized in that: The heat-resistant and anti-corrosion coating (3) is an organic silicon heat-resistant and anti-corrosion coating.

3. The high temperature and corrosion resistant heating pipe according to claim 1 is characterized in that: A protective layer (7) is fixedly arranged on the outer side of the anti-corrosion layer (6).

4. The high temperature and corrosion resistant heating pipe according to claim 1 is characterized in that: A reinforcement layer (8) is provided inside the second heat-insulating layer (4), and the reinforcement layer (8) is a mesh structure.

5. The high temperature and corrosion resistant heating pipe according to claim 4 is characterized in that: The mesh structure of the reinforcement layer (8) is a steel wire mesh.

6. The high temperature and corrosion resistant heating pipe according to claim 4, characterized in that: The mesh structure of the reinforcement layer (8) is a polyester fiber mesh, a polyamide fiber mesh or a glass fiber mesh.

7. The high temperature and corrosion resistant heating pipe according to claim 1 is characterized in that: The buffer layer (5) comprises a wave-shaped skeleton structure (51), and the grooves on both sides of the skeleton structure (51) are filled with buffer fillers (52).

8. The high temperature and corrosion resistant heating pipe according to claim 7, characterized in that: A buffer cavity (53) is provided inside the buffer filler (52).

9. The high temperature and corrosion resistant heating pipe according to claim 8, characterized in that: The buffer filler (52) is made of polyurethane material.

10. The high temperature and corrosion resistant heating pipe according to claim 1, characterized in that: The pipe body (1) is made of galvanized steel pipe.

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