Heat tracing composite pipe with self-venting function

Abstract

The utility model provides a kind of heat tracing composite pipe with self-bleeding function, it is related to heat tracing composite pipe technical field, including heat tracing composite pipe main body, pipe body, composite heat tracing structure layer, annular exhaust passage structure, automatic exhaust valve;Annular exhaust passage structure is assembled and arranged on the pipe body of heat tracing composite pipe main body, by annular exhaust passage structure inner side end and pipe body inner intercommunication, its inner gas is evenly guided to annular exhaust passage structure outside, and the gas that is guided out is discharged by automatic exhaust valve, while avoiding the leakage of liquid that automatic exhaust valve can discharge gas, exhaust function is integrated in composite pipe structure, without for on-site assembly exhaust system, save time and effort, avoid to destroy whole heat preservation waterproof structure;Timely exhaust avoids the adverse effect caused by "air block".

Description

Technical Field

[0001] This utility model relates to the field of heat tracing composite pipe technology, and in particular to a heat tracing composite pipe with self-venting function. Background Technology

[0002] The descriptions in this section provide background information relating to this disclosure and do not constitute prior art.

[0003] A typical heat tracing composite pipe consists of, from the inside out: a medium pipe, an insulation layer, a heat tracing tape, and an outer protective pipe. Its function is to prevent the fluid inside the pipe from condensing due to heat loss and to ensure smooth transportation.

[0004] After the initial operation or maintenance of the heat tracing composite pipe system, air will remain in the pipe. Due to the multi-layered and compact structure of the composite pipe, the traditional method of installing an independent air vent valve at the highest point of the pipe is complicated, costly and may damage the overall insulation and waterproof structure. The inability to expel the gas will lead to "air blockage", which will affect the flow meter's measurement accuracy, reduce heat transfer efficiency, and even cause local overheating of the heat tracing tape.

[0005] Therefore, there is an urgent need for a heat tracing composite pipe with high structural integration, which does not require additional exhaust valves and can automatically and efficiently discharge gas from the pipe. Utility Model Content

[0006] The purpose of this utility model is to provide a heat tracing composite pipe with self-venting function. Without changing the basic structure of the composite pipe or adding complex external components, it can realize the automatic and reliable discharge of gas in the pipe. This solves the technical problems of the traditional method of installing an independent vent valve at the highest point of the pipe, which is complicated to construct, costly and may damage the overall heat insulation and waterproof structure. The inability of gas to be discharged will lead to "air blockage", which will affect the flow meter measurement accuracy, reduce heat transfer efficiency and even cause local overheating of the heat tracing tape.

[0007] This utility model provides a heat tracing composite pipe with self-venting function, comprising: The main body of the heat tracing composite pipe includes the pipe body; The outer wall of the pipe is provided with a composite heat tracing structure layer; The pipe body is equipped with an annular exhaust channel structure; The inner end of the annular exhaust channel structure extends to the inner wall of the pipe body; An automatic exhaust valve runs longitudinally through the highest point of the composite heat tracing structure layer, and its lower end is fixedly connected to the upper end of the annular exhaust channel structure.

[0008] As a further optimization, in order to guide the gas inside the pipe to the annular groove and finally discharge it from the automatic exhaust valve, the annular exhaust channel structure includes: A tree-shaped exhaust pipe, with its uniform circumference opened on the pipe body; The inner end of the dendritic exhaust pipe extends to the inner wall of the pipe body and is evenly distributed along the length of the inner wall of the pipe body. The outer ends of the dendritic exhaust pipes are evenly distributed along the length of the inner wall of the pipe. The outer wall of the pipe has an annular groove corresponding to the outer end of the tree-shaped exhaust pipe, and the outer end of the tree-shaped exhaust pipe extends into the corresponding annular groove. A connecting block is uniformly and circumferentially fixedly assembled in the annular groove, and a strip-shaped through hole is opened along the direction of the annular groove. The automatic exhaust valve is provided corresponding to the annular groove, and the lower end of the automatic exhaust valve is fixedly connected to the upper end of the annular groove.

[0009] As a further optimization, in order to discharge the gas inside the pipe into the annular groove and finally out through the automatic exhaust valve, the tree-shaped exhaust pipe includes: A connecting tube is embedded and assembled into the tube body along its length, and both ends of the connecting tube are sealed. The outer side of the connecting pipe is uniformly and fixedly connected to an exhaust pipe along its length, which extends into the corresponding annular groove. The inner side of the connecting pipe is uniformly and fixedly connected with an inverted V-shaped branch pipe along its length, and the branch ends extend to the inner wall of the pipe body.

[0010] As a further optimization, in order to more evenly discharge gas through the capillary inverted V-shaped branch pipes with higher density, the gas is discharged outward along the exhaust pipe after being concentrated by the connecting pipe. The distribution density of the inverted V-shaped branch pipes is greater than that of the exhaust pipe. The inner diameter of the inverted V-shaped branch pipe, exhaust pipe, and connecting pipe increases sequentially.

[0011] As a further optimization, in order to exhaust the gas discharged from the annular exhaust channel structure to the outside for venting, the automatic exhaust valve includes: The main body of the exhaust valve has its input end fixedly connected to the upper end of the annular exhaust channel structure; The exhaust valve body's output end extends to the outermost part of the highest point of the composite heat tracing structure layer.

[0012] As a further optimization, in order to form a composite structural layer and provide insulation and protection for the heat tracing structural layer, the composite heat tracing structural layer further includes: A heat-conducting layer, which is fitted onto the outer wall of the tube; The outer wall of the tube is wrapped with an insulation layer; A heat tracing structure layer is provided between the insulation layer and the heat-conducting layer; The outer wall of the insulation layer is fitted with a protective layer; The input end of the exhaust valve body is fixedly connected to the inner wall of the heat-conducting layer.

[0013] As a further optimization, in order to seal the gap between the exhaust valve body and the outer wall and inner side of the heat-conducting layer and prevent leakage, the outer wall of the heat-conducting layer is provided with a reserved through hole corresponding to the exhaust valve body, and annular grooves are provided on both the inner and outer sides of the inner wall of the reserved through hole. The input end of the exhaust valve body is inserted and fixed in the reserved through hole; A first sealing ring is adhered and fixed inside the outer annular groove, and a second sealing ring is adhered and fixed inside the inner annular groove; The inner annular surfaces of the first and second sealing rings wrap around the outer wall of the exhaust valve body.

[0014] As a further optimization, in order to heat the composite pipe, prevent the fluid inside the pipe from condensing due to heat loss, and ensure smooth transportation, the heat tracing structure layer includes: An annular cavity is located between the insulation layer and the heat-conducting layer; Heating wires are uniformly inserted into the annular cavity, and are distributed along the length of the annular cavity.

[0015] This utility model provides a heat tracing composite pipe with self-venting function through improvements, which has the following improvements and advantages compared with the prior art: An annular venting channel structure is installed on the main body of the heat tracing composite pipe. The inner end of the annular venting channel structure is connected to the inside of the pipe, and the gas inside is evenly guided to the outside of the annular venting channel structure. The guided gas is discharged through an automatic venting valve. The automatic venting valve can discharge gas while preventing liquid leakage. The venting function is integrated into the composite pipe structure, eliminating the need for on-site assembly of the venting system, saving time and effort, and avoiding damage to the overall heat insulation and waterproof structure. Timely venting avoids the adverse effects of "air blockage". Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the structure of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the tree-shaped exhaust pipe structure of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1-Heat tracing composite pipe body, 11-Pipe body, 12-Heat conductive layer, 13-Insulation layer, 14-Heat tracing structure layer, 141-Annular cavity, 142-Electric heating wire, 15-Protective layer, 2-Automatic exhaust valve, 21-Exhaust valve body, 22-First sealing ring, 23-Second sealing ring, 3-Annular exhaust channel structure, 31-Tree-shaped exhaust pipe, 311-Connecting pipe, 312-Exhaust pipe, 313-Inverted V-shaped branch pipe, 32-Annular groove, 33-Connecting block, 34-Strip-shaped through hole. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a heat tracing composite pipe with self-venting function, comprising: The main body 1 of the heat tracing composite pipe includes a pipe body 11; The outer wall of the pipe body 11 is provided with a composite heat tracing structure layer; The pipe body 11 is equipped with an annular exhaust channel structure 3; The inner end of the annular exhaust channel structure 3 extends to the inner wall of the pipe body 11; An automatic exhaust valve 2 runs longitudinally through the highest point of the composite heat tracing structure layer, and its lower end is fixedly connected to the upper end of the annular exhaust channel structure 3.

[0023] Specifically in this embodiment, the pipe body 11 and the composite heat tracing structure layer both adopt existing technologies, and the annular exhaust channel structure 3 and the automatic exhaust valve 2 are integrated on the basis of them, eliminating the need for on-site assembly of the exhaust system, saving time and effort, and avoiding damage to the overall thermal insulation and waterproof structure. Furthermore, an annular exhaust channel structure 3 is installed on the pipe body 11 of the heat tracing composite pipe body 1. The inner end of the annular exhaust channel structure 3 is connected to the inside of the pipe body 11, so that the gas inside is evenly guided to the outside of the annular exhaust channel structure 3. The guided gas is discharged through the automatic exhaust valve 2. The automatic exhaust valve 2 can discharge the gas while avoiding liquid leakage, and timely exhaust avoids the adverse effects of "air blockage". More specifically, the exhaust valve body 21 in the automatic exhaust valve 2 is an application of existing technology. This device is very common in many fields such as HVAC systems, water supply systems, solar water heating systems, and compressor pipelines. It is used to remove air accumulated at the highest point of the pipeline to ensure the efficient and stable operation of the system. When there is no liquid in the valve, the hollow float falls due to gravity, and the valve opens to exhaust air. When liquid enters, the hollow float rises due to the buoyancy of the liquid, and the inner cavity of the sealing ring blocks the outlet to prevent liquid leakage and automatically exhaust air from the pipe. It is a direct application of mature existing technology, and its internal structure will not be described in detail in this article. The heat tracing composite pipe body 1 can be used for the transportation of liquid media, and the excess gas inside can be discharged through the automatic exhaust valve 2.

[0024] In some embodiments, the annular exhaust channel structure 3 includes: A tree-shaped exhaust pipe 31 is evenly circumferentially opened on the pipe body 11; The inner end of the tree-shaped exhaust pipe 31 extends to the inner wall of the pipe body 11 and is evenly distributed along the length of the inner wall of the pipe body 11. The outer ends of the tree-shaped exhaust pipes 31 are evenly distributed along the length of the inner wall of the pipe body 11. An annular groove 32 is provided on the outer wall of the pipe body 11 corresponding to the outer end of the tree-shaped exhaust pipe 31, and the outer end of the tree-shaped exhaust pipe 31 extends into the corresponding annular groove 32. A connecting block 33 is uniformly and circumferentially fixedly assembled in the annular groove 32, and a strip-shaped through hole 34 is opened along the direction of the annular groove 32. Automatic exhaust valve 2 is provided corresponding to annular groove 32, and the lower end of automatic exhaust valve 2 is fixedly connected to the upper end of annular groove 32.

[0025] Specifically in this embodiment, the inner end of the branched exhaust pipe 31 has many branches, and the branched exhaust pipe 31 has multiple branches arranged around the circumference of the pipe 11 to evenly exhaust the gas inside the pipe 11. Furthermore, the outer end of the tree-shaped exhaust pipe 31 corresponds to the annular groove 32, guiding the discharged gas into the annular groove 32. During this process, some of the liquid medium is also discharged. Due to the sealing design between the lower end of the automatic exhaust valve 2 and the heat-conducting layer 12, these liquids are prevented from leaking into other composite structure layers. More specifically, the gas in the annular groove 32 is discharged from the automatic exhaust valve 2, while the liquid medium is blocked by the automatic exhaust valve 2 and will not leak out.

[0026] In some embodiments, the tree-shaped exhaust duct 31 includes: The connecting pipe 311 is embedded and assembled in the pipe body 11 along its length, and the connecting pipe 311 has a sealed end design. The outer side of the connecting pipe 311 is uniformly and fixedly connected to the exhaust pipe 312 along the length direction, which extends into the corresponding annular groove 32. The inner side of the connecting pipe 311 is uniformly connected with an inverted V-shaped branch pipe 313 along the length direction, and its branch end extends to the inner wall of the pipe body 11.

[0027] Specifically in this embodiment, the connecting pipe 311 is used to connect with the V-shaped branch pipe 313 and the exhaust pipe 312, serving as a transfer and temporary storage point for gas. Furthermore, the inverted V-shaped branch pipe 313 forms two branches, and multiple inverted V-shaped branch pipes 313 are densely arranged to form a tree-like structure, which uniformly and quickly discharges the gas in the pipe body 11. At the same time, the liquid matrix discharged to the annular groove 32 can also flow back into the pipe body 11 along the tree-like exhaust pipe 31. More specifically, the exhaust pipe 312 is positioned corresponding to the annular groove 32 and is used to guide the gas in the connecting pipe 311 into the annular groove 32.

[0028] In some embodiments, the distribution density of the inverted V-shaped branch pipe 313 is greater than that of the exhaust pipe 312; The inner diameters of the inverted V-shaped branch pipe 313, the exhaust pipe 312, and the connecting pipe 311 increase sequentially. The gas is discharged more evenly through the dense capillary inverted V-shaped branch pipe 313, and then discharged outward along the exhaust pipe 312 after being concentrated by the connecting pipe 311.

[0029] In some embodiments, the automatic exhaust valve 2 includes: The exhaust valve body 21 has its input end fixedly connected to the upper end of the annular exhaust channel structure 3; The exhaust valve body 21 extends to the outermost part of the highest point of the composite heat tracing structure layer.

[0030] Specifically in this embodiment, the exhaust valve body 21 discharges the gas discharged from the annular exhaust channel structure 3 to the outside for exhaust; Furthermore, the exhaust valve body 21 extends to the outermost part of the highest point of the composite heat tracing structure layer, concentrating the gas to be discharged at a high position.

[0031] In some embodiments, the composite heat tracing structure layer further includes: The heat-conducting layer 12 is sleeved on the outer wall of the tube body 11; The outer wall of the pipe body 11 is covered with an insulation layer 13; A heat tracing structure layer 14 is provided between the insulation layer 13 and the heat-conducting layer 12; The outer wall of the insulation layer 13 is fitted with a protective layer 15; The input end of the exhaust valve body 21 is fixedly connected to the inner wall of the heat-conducting layer 12.

[0032] Specifically, in this embodiment, the composite heat tracing structure layer is an application of existing technology. The insulation layer 13 is supported by insulation material and is used for the insulation of the pipe body 11. In this embodiment, the heat tracing structure layer 14 is electric heat tracing and is used to heat the pipe body 11. The heat is transferred to the tank body 11 through the heat conduction layer 12. Furthermore, the protective layer 15 is used to shield the internal structure from the outside and is made of pressure-resistant, wear-resistant, high-strength, and chemically resistant material.

[0033] In some embodiments, the outer wall of the heat-conducting layer 12 is provided with a reserved through hole corresponding to the exhaust valve body 21, and an annular groove is provided on both the inner and outer sides of the inner wall of the reserved through hole. The input end of the exhaust valve body 21 is inserted and fixed in the reserved through hole; A first sealing ring 22 is pasted and fixed inside the outer annular groove, and a second sealing ring 23 is pasted and fixed inside the inner annular groove; The inner rings of the first sealing ring 22 and the second sealing ring 23 wrap around the outer wall of the exhaust valve body 21.

[0034] Specifically, in this embodiment, both the first sealing ring 22 and the second sealing ring 2 are made of rubber. Furthermore, the first sealing ring 22 and the second sealing ring 23 respectively seal the gaps between the outer wall of the exhaust valve body 21 and the outer and inner sides of the reserved through hole, preventing liquid medium from leaking into other structural layers.

[0035] In some embodiments, the heat tracing structure layer 14 includes: An annular cavity 141 is located between the insulation layer 13 and the heat-conducting layer 12; Electric heating wires 142 are uniformly inserted into the annular cavity 141 in a circular pattern. They are distributed along the length of the annular cavity 141. The electric heating wires 142 are existing technology applications. They have a power supply end that extends to the outside of the composite heat tracing structure layer and is connected to the power supply to generate heat when energized.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat tracing composite pipe with self-venting function, characterized in that, include: The main body of the heat tracing composite pipe (1) includes a pipe body (11). The outer wall of the pipe body (11) is provided with a composite heat tracing structure layer; The pipe body (11) is equipped with an annular exhaust channel structure (3). The inner end of the annular exhaust channel structure (3) extends to the inner wall of the pipe body (11); An automatic exhaust valve (2) is longitudinally inserted at the highest point of the composite heat tracing structure layer, and its lower end is fixedly connected to the upper end of the annular exhaust channel structure (3).

2. The heat tracing composite pipe with self-venting function according to claim 1, characterized in that, The annular exhaust channel structure (3) includes: A tree-shaped exhaust pipe (31) is evenly circumferentially opened on the pipe body (11); The inner end of the dendritic exhaust pipe (31) extends to the inner wall of the pipe body (11) and is evenly distributed along the length of the inner wall of the pipe body (11); The outer end of the dendritic exhaust pipe (31) is evenly distributed along the length of the inner wall of the pipe body (11); The outer wall of the pipe body (11) is provided with an annular groove (32) corresponding to the outer end of the tree-shaped exhaust pipe (31), and the outer end of the tree-shaped exhaust pipe (31) extends into the corresponding annular groove (32). A connecting block (33) is uniformly and circumferentially fixedly assembled in the annular groove (32), and a strip-shaped through hole (34) is opened along the direction of the annular groove (32). The automatic exhaust valve (2) is provided corresponding to the annular groove (32), and the lower end of the automatic exhaust valve (2) is fixedly connected to the upper end of the annular groove (32).

3. A heat tracing composite pipe with self-venting function according to claim 2, characterized in that, The dendritic exhaust duct (31) includes: A connecting tube (311) is embedded and assembled in the tube body (11) along its length, and the connecting tube (311) is designed with sealed ends; The outer side of the connecting pipe (311) is uniformly connected to an exhaust pipe (312) along the length direction, which extends into the corresponding annular groove (32); The inner side of the connecting pipe (311) is uniformly connected to an inverted V-shaped branch pipe (313) along the length direction, and its branch end extends to the inner wall of the pipe body (11).

4. A heat tracing composite pipe with self-venting function according to claim 3, characterized in that, The distribution density of the inverted V-shaped branch pipe (313) is greater than that of the exhaust pipe (312); The inner diameter of the inverted V-shaped branch pipe (313), the exhaust pipe (312), and the connecting pipe (311) increases sequentially.

5. A heat tracing composite pipe with self-venting function according to claim 1, characterized in that, The automatic exhaust valve (2) includes: The exhaust valve body (21) has its input end fixedly connected to the upper end of the annular exhaust channel structure (3); The exhaust valve body (21) extends to the outermost part of the highest point of the composite heat tracing structure layer.

6. A heat tracing composite pipe with self-venting function according to claim 5, characterized in that, The composite heat tracing structure layer also includes: A heat-conducting layer (12) is fitted onto the outer wall of the tube body (11); The outer wall of the tube (11) is covered with a heat insulation layer (13); A heat tracing structure layer (14) is provided between the insulation layer (13) and the heat-conducting layer (12). The outer wall of the insulation layer (13) is fitted with a protective layer (15); The input end of the exhaust valve body (21) is fixedly connected to the inner wall of the heat-conducting layer (12).

7. A heat tracing composite pipe with self-venting function according to claim 6, characterized in that, The outer wall of the heat-conducting layer (12) is provided with a reserved through hole corresponding to the exhaust valve body (21), and the inner and outer sides of the reserved through hole are provided with annular grooves. The input end of the exhaust valve body (21) is inserted and fixed in the reserved through hole; A first sealing ring (22) is pasted and fixed inside the outer annular groove, and a second sealing ring (23) is pasted and fixed inside the inner annular groove. The inner annular surfaces of the first sealing ring (22) and the second sealing ring (23) wrap around the outer wall of the exhaust valve body (21).

8. A heat tracing composite pipe with self-venting function according to claim 6, characterized in that, The heat tracing structure layer (14) includes: An annular cavity (141) is located between the insulation layer (13) and the heat-conducting layer (12); The annular cavity (141) is uniformly circumferentially connected with heating wires (142), which are distributed along the length of the annular cavity (141).

Images