Heater for pipeline

Abstract

The heater comprises a flexible sleeve used for wrapping the pipeline, the flexible sleeve comprises a heating piece and a heat preservation piece which are arranged in a split mode, when the flexible sleeve is installed on the pipeline, the heating piece is wound around the peripheral side of the pipeline so as to heat the pipeline, and the heat preservation piece is wound around the peripheral side of the heating piece so as to wrap the heating piece. According to the flexible sleeve, the heating piece and the heat preservation piece are arranged in a split mode, the heating piece and the heat preservation piece can be bent and wound respectively so that the heating piece can be installed on the peripheral side of the pipeline, the heat preservation piece can be installed on the peripheral side of the heating piece, and compared with an integrated flexible sleeve with the heating and heat preservation functions, the heating piece and the heat preservation piece are thinner in thickness. During installation, the heating pieces and the heat preservation pieces are easier to deform respectively, installation is more convenient and simpler, meanwhile, the heating pieces can be fully attached to the outer side wall of the pipeline, the peripheral side of the pipeline is heated evenly, crystallization of materials conveyed in the pipeline is avoided, and stable conveying of the materials in the pipeline is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of heating, and particularly relates to a heater for a pipeline. Background Art

[0002] When manufacturing semiconductor wafers, gases such as silicon nitride and dichloroxylene or other liquid materials need to be transported through pipelines. Since materials such as silicon nitride and dichloroxylene are extremely likely to crystallize in a low-temperature environment, it is necessary to heat the pipelines of the semiconductor to ensure that the pipelines can stably transport the materials.

[0003] The prior art patent US5883364A discloses a heating sleeve. The heating sleeve basically includes a flexible inner lining 11 formed of an electrostatically dissipative and substantially particle-free fabric, a flexible intermediate layer 12 of an elastic and substantially fiber-free insulating material, a flexible heating element 13 located between the inner lining 11 and the insulating material intermediate layer 12, and a flexible outer cover 14 formed of an electrostatically dissipative and substantially particle-free fabric. After the inner lining 11, the intermediate layer 12 of the heat-insulating material, and the flexible outer cover 14 are wound, they generally conform to the shape and size of the pipeline 15 to be heated. The above flexible inner lining 11, intermediate layer 12, flexible heating element 13, and flexible outer cover 14 are an integrated heating sleeve. Therefore, when the heating sleeve is wound around the outer peripheral side of the pipeline 15, the flexible inner lining 11, intermediate layer 12, flexible heating element 13, and flexible outer cover 14 will bend and deform together. Coupled with the fact that some heat-insulating materials are selected for the intermediate layer 12, which makes the heating sleeve thicker, there will be the following problems when the heating sleeve is installed on the outer peripheral side of the pipeline 15:

[0004] The flexible heating sleeve with heating and heat-insulating functions in the above patent is an integrated structure with a relatively large thickness. When the flexible heating sleeve is installed on the outer side of the pipeline, it is difficult for the flexible heating sleeve to deform or the winding deformation is not fully in place, resulting in it being difficult for the inner side wall of the flexible heating sleeve to fully or mostly fit with the outer side wall of the pipeline. There are extremely large gaps in some positions between the two. That is, for example, only a part of the outer side wall of the pipeline is attached with the flexible heating sleeve, and there are gaps between the flexible heating sleeve and the other part of the pipeline. The gaps will reduce the heat transfer effect between the flexible heating sleeve and the pipeline, causing uneven heating on the periphery of the pipeline, extremely likely resulting in the temperature of some positions of the pipeline not reaching the required temperature for transporting materials, and further causing the materials to crystallize in the pipeline. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a heater for a pipeline to solve the problem of material crystallization caused by uneven heating of the pipeline.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solution: a heater for a pipeline, comprising a flexible sleeve for wrapping the pipeline, the flexible sleeve comprising a heating sheet and a heat preservation sheet which are separately arranged, when the flexible sleeve is installed on the pipeline, the heating sheet is wound around the outer peripheral side of the pipeline and the inner surface of the heating sheet is in contact with the pipeline to heat the pipeline, and the heat preservation sheet is wound around the outer peripheral side of the heating sheet to wrap the heating sheet. The technical solution has the following technical effects:

[0007] The utility model winds a heating plate outside the pipeline so that the heating plate can heat the entire pipeline, thereby making the pipeline reach the temperature required for transmitting gas or liquid materials, avoiding crystallization of materials transmitted in the pipeline due to too low temperature in the pipeline, and ensuring stable transmission of materials in the pipeline. By winding a heat preservation plate outside the heating plate, the heat preservation plate can wrap the outer peripheral side of the heating plate, preventing the heat generated by the heating plate from dissipating to its outer peripheral side in large quantities, reducing the heat dissipation speed of the heating plate, reducing the power consumption of the heating plate, and saving energy. By setting the heating plate and the thermal insulation plate separately, when the flexible sleeve is installed on the pipeline, the heating plate and the thermal insulation plate can be bent and rolled respectively, so as to respectively install the heating plate on the outer peripheral side of the pipeline and the thermal insulation plate on the outer peripheral side of the heating plate. Compared with the flexible sleeve with heating and thermal insulation functions that is arranged in one piece, the separately arranged heating plate and the thermal insulation plate are each thinner in thickness. When installed to the outside of the pipeline, the heating plate and the thermal insulation plate are more likely to deform separately. At the same time, the heating plate can fit together with the outer wall of the pipeline to avoid a gap between the heating plate and the outer wall of the pipeline as much as possible. The heating plate can heat the pipeline by fitting together with the outer peripheral side of the pipeline, thereby improving the heat transfer effect between the flexible sleeve and the pipeline, making the outer peripheral side of the pipeline heated evenly, avoiding crystallization of materials transported in the pipeline, and ensuring stable transmission of materials in the pipeline.

[0008] In the above-mentioned heater for pipelines, the flexible sleeve also includes a first locking assembly arranged on the outer surface of the heating plate, and the first locking assembly is used to lock the heating plate wrapped around the outer peripheral side of the pipeline. In this way, the first locking assembly limits and locks the heating plate to prevent the heating plate from loosening, so that the inner surface of the heating plate is closely attached to the outer surface of the pipeline, and then the heat can be evenly and stably transmitted from the outer periphery of the heating plate to the pipeline, ensuring the temperature stability of each position of the pipeline. Also, because the first locking assembly locks the heating plate in the split setting separately, the heating plate will deform itself and be closely attached to the pipeline through the first locking assembly on its outer side. Compared with the one-piece flexible sleeve that must be locked on the outermost side of the insulation layer of the flexible sleeve, the first locking assembly independent of the heating plate is more likely to deform the heating plate and avoid the gap between the inner surface of the heating plate and the pipeline.

[0009] In the above-mentioned heater for a pipeline, there are multiple first locking components, and the multiple first locking components are spaced apart along the length direction of the heating sheet. With such an arrangement, the multiple first locking components form multiple locking zones spaced apart in the length direction of the heating sheet. Each first locking component is responsible for the close contact between the heating sheet and the pipeline within each locking zone. Compared with an entire continuous locking component, the multiple first locking components can limit and lock each locking zone in the length direction of the heating sheet, and the locking effect of each locking zone is better, so that the overall locking effect of the heating sheet in the length direction is good, the fitting effect between the locking zone of the heating sheet in the axial direction of the pipeline and the pipeline is good, and further the pipeline is heated more uniformly in the axial direction.

[0010] In the above-mentioned heater for a pipeline, the first locking component includes a locking ring and a connecting band arranged on the heating sheet. The connecting band has a mounting end and a free end. The mounting end is fixed to the heating sheet, and the free end passes through the locking ring, and the connecting band is detachably connected to the locking ring through a fastener.

[0011] With such an arrangement, by setting the first locking component into a structure in which the locking ring and the connecting band cooperate, the connecting band passes through the locking ring and is locked or disengaged from itself or the heating sheet through a fastener, so that the detachable connection between the connecting band and the locking ring can be realized. When the free end of the connecting band is locked to the connecting band or the heating sheet, the connecting band forms a pulling force on the locking ring, and further the opposite ends of the heating sheet are pulled to maintain a wound state close to each other, so as to ensure the stable contact between the heating sheet and the pipeline, and the heat conduction is more stable. When the free end of the connecting band is disengaged from the connecting band or the heating sheet, the heating sheet can be made to no longer hold the pipeline tightly, and further the separation between the heating sheet and the pipeline can be realized, and the installation and disassembly are convenient and simple.

[0012] Alternatively, in the above-mentioned heater for a pipeline, the first locking component is one of a magic tape, a snap fastener, and a buckle provided on the heating sheet. When the heating sheet is wrapped around the pipeline, the two end portions of the heating sheet can be detachably connected through the first locking component. When the heating sheet is wound and wrapped around the outer side of the pipeline, the two ends of the heating sheet that are close to each other can be directly locked through the magic tape or snap fastener or buckle serving as the first locking component, so that the two ends of the heating sheet are connected to maintain a wound state, ensuring the stable contact between the heating sheet and the pipeline, with a simple and reliable structure and reducing the production and processing difficulty of the first locking component.

[0013] In the above-mentioned heater for a pipeline, the first locking assembly protrudes on the outer surface of the heating sheet to form a bulging portion. A second locking assembly is provided on the heat insulation sheet. The second locking assembly is used to lock and wrap the heat insulation sheet on the outer peripheral side of the heating sheet, so that the inner surface of the heat insulation sheet can be attached to the bulging portion and the heating sheet. Since the first locking assembly locks the heating sheet on its outer surface, a bulging portion will protrude on the outer surface of the heating sheet. When the heat insulation sheet is wrapped outside the heating sheet, the second locking assembly connected to the heat insulation sheet limits the heat insulation sheet through locking, so that the inner surface of the heat insulation sheet fits the first locking assembly and the heating sheet that serves as the bulging portion and maintains the winding state of being wound outside the heating sheet, minimizing the gap between the inner surface of the heat insulation sheet and the heating sheet, ensuring the complete wrapping of the peripheral side of the heating sheet by the heat insulation sheet, preventing a large amount of heat from being dissipated from the outer peripheral side of the heating sheet, and improving the heat insulation effect. In addition, the first locking assembly and the second locking assembly cooperate with the separately arranged heating sheet and heat insulation sheet to play their respective roles. By providing the first locking assembly and the second locking assembly on the heating sheet and the heat insulation sheet respectively, during installation, the heating sheet can be first clamped on the pipeline through the first locking assembly, and then the heat insulation sheet can be clamped on the heating sheet through the second locking assembly. The heating sheet and the heat insulation sheet are each easy to wind and deform for fitting, and their respective locking assemblies lock themselves, so that the heating sheet is closely attached to the pipeline to achieve a good and uniform heating effect, and the heat insulation sheet is closely attached to the heating sheet to achieve a good heat insulation effect.

[0014] In the above-mentioned heater for a pipeline, the bulging portion surrounds a part of the circumference of the pipeline. The opposite ends of the heat insulation sheet can be butted together through the second locking assembly to form a butting position, and the butting position is arranged out of alignment with the bulging portion in the circumferential direction of the pipeline. With such an arrangement, during the process of winding the heat insulation sheet and the approach of its opposite ends to form a butting position, the inner surface of the heat insulation sheet can effectively compress the bulging portion, making it easy for the heat insulation sheet and the bulging portion to each undergo large deformations. There is a good degree of fit between the inner surface of the heat insulation sheet and the bulging portion and the heating sheet respectively, so as to reduce the gap between the inner surface of the heat insulation sheet and the outer surface of the heating sheet and thus achieve a good heat insulation effect. If at least part of the butting position and the bulging portion overlap, then during the process of winding the heat insulation sheet and the approach of its opposite ends to form a butting position, the inner surface of the heat insulation sheet cannot compress the bulging portion well, and the degree of fit between the heat insulation sheet and the bulging portion and the heating sheet respectively becomes poor, thereby affecting the heat insulation effect of the heat insulation sheet.

[0015] In the above-mentioned heater for a pipeline, the heating sheet includes a heating element, an inner protective layer for fitting the pipeline, and an outer protective layer disposed opposite to the inner protective layer. The edges of the inner protective layer and the outer protective layer are connected to encapsulate the heating element therebetween. When the heating sheet is wound around the pipeline, the heating element is also wound around the outer peripheral side of the pipeline along with the heating sheet. The inner protective layer is located between the heating element and the pipeline and fits against the outer side wall of the pipeline to separate the heating element and the outer side wall of the pipeline. The outer protective layer is located on the outer peripheral side of the heating element facing away from the pipeline to protect the outer peripheral side of the heating element.

[0016] In the above-mentioned heater for a pipeline, the inner protective layer and the outer protective layer are respectively made of one or more of PTFE mechanism cloth, tetrafluoro cloth, silica gel cloth, welding cloth, PI film, and aramid fiber cloth. While enabling the inner protective layer and the outer protective layer to have fast heat conduction and high strength, they also have good insulation performance, avoiding electric leakage of the heating sheet and causing electric shock to users, improving the safety performance of the heating sheet. The edges of the inner protective layer and the outer protective layer can be connected by sewing lines or by bonding or other means.

[0017] In the above-mentioned heater for a pipeline, the heating element is flexible and can be wound around the outer peripheral side of the pipeline. The heating element is one of a heating film and a heating wire. The flexible heating element uses a heating film or a heating wire, and the deformation of the heating element itself is easy to wind around the outer peripheral side of the pipeline to heat the peripheral side of the pipeline, resulting in good heating effect. Alternatively, the heating sheet further includes a heat conduction layer, and the heat conduction layer is located on one side of the inner protective layer. The heat conduction layer can be located inside or outside the inner protective layer. When the heat conduction layer is located inside the inner protective layer, the heat generated by the heating element can be evenly transferred to the inner protective layer through the heat conduction layer, and then evenly transferred to the pipeline, making the peripheral side of the pipeline heat more evenly, and further making the material transported in the pipeline heat more evenly, avoiding crystallization of the material transported in the pipeline due to uneven heating, ensuring the stable transportation of the material, and at the same time improving the temperature control accuracy of the heater for heating the pipeline.

[0018] In the above-mentioned heater for a pipeline, the heat insulation sheet includes a heat insulation element and an inner heat insulation layer and an outer heat insulation layer that are overlapped. The edges of the inner heat insulation layer and the outer heat insulation layer are connected to encapsulate the heat insulation element therebetween. When the heat insulation sheet is wrapped around the outside of the heating sheet, the inner heat insulation layer is disposed inside the heat insulation element to fit against the heating sheet, and the outer heat insulation layer is disposed on the outer peripheral side of the heat insulation element to protect the outer peripheral side of the heat insulation element and prevent damage to the heat insulation element, extending the service life of the heat insulation element.

[0019] In the above-mentioned heater for a pipeline, the heat insulation member is made of at least one of PI cotton, fiberglass cotton, pre-oxidized fiber, and foamed silica gel. Using the above materials to make the heat insulation member can maintain the soft performance of the heat insulation member for easy wrapping of the heating sheet. At the same time, the heat insulation effect of the heat insulation member is good, reducing heat loss, and thus ensuring that most of the heat is used for the heating and heat preservation of the pipeline, saving energy.

[0020] The features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present utility model will be further described below in conjunction with the drawings and specific embodiments:

[0022] Figure 1 FIG. is a perspective view of the heater in Embodiment 1 wrapped around the pipeline;

[0023] Figure 2 FIG. is a sectional view of the heating sheet in Embodiment 1 wrapped around the pipeline;

[0024] Figure 3 FIG. is a sectional view of the heater in Embodiment 1;

[0025] Figure 4 FIG. is an assembly diagram of the first locking assembly and the heating sheet in Embodiment 1;

[0026] Figure 5 FIG. is an assembly diagram of the heat insulation sheet and the second locking assembly in Embodiment 1;

[0027] Figure 6 FIG. is a sectional view of the heating sheet in Embodiment 4 wrapped around the pipeline.

[0028] REFERENCE NUMERALS:

[0029] 100, flexible sleeve;

[0030] 200, heating sheet; 210, heating element; 220, inner protective layer; 230, outer protective layer; 240, heat conduction layer;

[0031] 300, heat insulation sheet; 310, heat insulation member; 320, inner heat insulation layer; 330, outer heat insulation layer;

[0032] 400, first locking assembly; 410, locking ring; 420, connecting band; 421, installation end; 422, free end; 430, fastener;

[0033] 500, second locking assembly;

[0034] 600, pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The utility model proposes a heater for pipelines, including a flexible sleeve for wrapping the pipeline, the flexible sleeve including a heating sheet and a heat preservation sheet which are separately arranged, when the flexible sleeve is installed on the pipeline, the heating sheet is wound around the outer peripheral side of the pipeline and the inner surface of the heating sheet is in contact with the outer wall of the pipeline to heat the pipeline, and the heat preservation sheet is wound around the outer peripheral side of the heating sheet to wrap the heating sheet. The utility model winds the heating sheet outside the pipeline so that the heating sheet can heat the entire pipeline, thereby making the pipeline reach the temperature required for transmitting gas or liquid materials, avoiding crystallization of materials transmitted in the pipeline due to too low temperature in the pipeline, ensuring stable transmission of materials in the pipeline, and winding the heat preservation sheet outside the heating sheet so that the heat preservation sheet can wrap the outer peripheral side of the heating sheet, preventing the heat generated by the heating sheet from being dissipated to the outer peripheral side in large quantities, reducing the heat dissipation speed of the heating sheet, reducing the power consumption of the heating sheet, and saving energy. By setting the heating plate and the thermal insulation plate separately, when the flexible sleeve is installed on the pipeline, the heating plate and the thermal insulation plate can be bent separately to install the two on the pipeline in sequence. Compared with the flexible sleeve with heating and thermal insulation functions that is set in one piece, the separately set heating plate and the thermal insulation plate are respectively thinner in thickness. When installed to the outside of the pipeline, the heating plate and the thermal insulation plate are easier to deform separately, and the installation is more convenient and simple. At the same time, the heating plate can fit together with the outer wall of the pipeline to avoid a gap between the heating plate and the outer wall of the pipeline as much as possible. The heating plate can heat the pipeline by fitting together with the outer peripheral side of the pipeline, thereby improving the heat transfer effect between the flexible sleeve and the pipeline, making the outer peripheral side of the pipeline heated evenly, avoiding crystallization of materials transported in the pipeline, and ensuring stable transmission of materials in the pipeline.

[0036] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0037] 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", "clockwise", "counterclockwise" and the like 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 on the present invention.

[0038] In addition, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise clearly defined.

[0039] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0041] Embodiment 1:

[0042] A heater for a pipeline, as Figures 1 to 5 shown, includes a flexible sleeve 100 that can be bent and deformed. The flexible sleeve 100 can be wrapped around the outside of a semiconductor pipeline 600 for transporting materials such as silicon nitride and dichloroxylene gas through bending and deformation. The flexible sleeve 100 includes a heating sheet 200 and a heat-insulating sheet 300. The heating sheet 200 and the heat-insulating sheet 300 are separately arranged. When the flexible sleeve 100 needs to be installed on the outer peripheral side of the pipeline 600, first bend the heating sheet 200 to wind it around the outer peripheral side of the pipeline 600. The inner surface of the heating sheet 200 is attached to the outer side wall of the pipeline 600 for heating the pipeline 600. Then bend the heat-insulating sheet 300 to wind it around the outer peripheral side of the heating sheet 200. The heat-insulating sheet 300 is attached to the outer peripheral side of the heating sheet 200 to form a wrap around the heating sheet 200. The heat-insulating sheet 300 clamps the heating sheet 200 between the heat-insulating sheet 300 and the pipeline 600 to reduce the heat dissipation rate of the heating sheet 200, so that the pipeline 600 reaches and maintains the temperature required for transporting gas or liquid materials, generally heating to about 200 °C.

[0043] In the present utility model, by winding the heating sheet 200 around the outer peripheral side of the pipeline 600, the heating sheet 200 can heat the whole pipeline 600, so that the pipeline 600 reaches the temperature required for transporting gas or liquid materials, avoiding crystallization of the materials transported in the pipeline 600 due to too low temperature in the pipeline 600, ensuring the stable transportation of the materials in the pipeline 600. By winding the heat insulation sheet 300 around the outer peripheral side of the heating sheet 200, the heat insulation sheet 300 can wrap the outer peripheral side of the heating sheet 200, preventing a large amount of heat generated by the heating sheet 200 from dissipating to its outer peripheral side, reducing the heat dissipation speed of the heating sheet 200, reducing the power consumption of the heating sheet 200, and saving energy.

[0044] By separately arranging the heating sheet 200 and the heat insulation sheet 300, when the flexible sleeve 100 is installed on the pipeline 600, the heating sheet 200 and the heat insulation sheet 300 can be bent respectively to install them on the pipeline 600 in sequence. Compared with the flexible sleeve 100 with heating and heat insulation functions which is integrally arranged, the respective thicknesses of the separately arranged heating sheet 200 and heat insulation sheet 300 are thinner. When installed on the outer peripheral side of the pipeline 600, the heating sheet 200 and the heat insulation sheet 300 are more likely to deform respectively, and the installation is more convenient and simple. At the same time, the heating sheet 200 fits with the outer side wall of the pipeline 600, avoiding generating a gap between the heating sheet 200 and the outer side wall of the pipeline 600. The heating sheet 200 can heat the pipeline 600 by fitting with the outer peripheral side of the pipeline 600, improving the heat transfer effect between the flexible sleeve 100 and the pipeline 600, making the outer peripheral side of the pipeline 600 uniformly heated, avoiding crystallization of the materials transported in the pipeline 600, and ensuring the stable transportation of the materials in the pipeline 600.

[0045] In this embodiment, the flexible sleeve 100 further includes a first locking assembly 400. The first locking assembly 400 is arranged on the outer surface of the heating sheet 200 to lock and wrap the heating sheet 200 around the outer peripheral side of the pipeline 600. The first locking assembly 400 limits and locks the opposite ends of the heating sheet 200, avoiding loosening of the heating sheet 200, so that the inner surface of the heating sheet 200 is closely attached to the outer surface of the pipeline 600, and further enabling heat to be stably transferred from the heating sheet 200 to the pipeline 600, ensuring the temperature stability at each position of the pipeline 600. Among them, the opposite ends of the heating sheet 200 refer to the two ends that approach each other during the process of winding the heating sheet 200 into a substantially hollow cylinder adapted to the pipeline 600.

[0046] The first locking assembly may be provided with one or multiple (two or more). In this embodiment, preferably, multiple first locking assemblies 400 are provided. When the flexible sleeve 100 is wrapped around the pipeline 600, the multiple first locking assemblies 400 are spaced along the length direction of the heating sheet 200 (i.e., the axial direction of the pipeline 600), preferably at equal intervals. The multiple first locking assemblies 400 form multiple locking zones in the length direction of the heating sheet 200. Each first locking assembly 400 is responsible for the close contact between the heating sheet 200 and the pipeline 600 within each locking zone. Compared with a single continuous locking assembly, the multiple first locking assemblies 400 can limit and lock each locking zone in the length direction of the heating sheet 200, resulting in better local deformation and locking effect of the heating sheet 200 in each locking zone, thus making the overall locking effect of the heating sheet 200 in the length direction good, ensuring a good fitting effect between the heating sheet 200 and the pipeline 600 in the axial direction of the pipeline 600, and further making the pipeline 600 heat more uniformly in the axial direction.

[0047] As Figure 2 shown, the first locking assembly 400 in this embodiment includes a locking ring 410 and a connecting belt 420. The locking ring 410 and the connecting belt 420 are respectively arranged at the two ends of the heating sheet 200 that are close to each other. The two ends of the connecting belt 420 are respectively an installation end 421 and a free end 422. The installation end 421 is fixed to the heating sheet 200. During installation, the free end 422 first passes through the locking ring 410 and then is folded back. The folded-back free end 422 is locked with the connecting belt 420 itself or the heating sheet 200 through a fastener 430. By setting the first locking assembly 400 into a structure with the cooperation of the locking ring 410 and the connecting belt 420, the connecting belt 420 passes through the locking ring 410 and is locked or disconnected from the connecting belt 420 itself or the heating sheet 200 through the fastener 430, realizing the detachable connection between the connecting belt 420 and the locking ring 410. When the free end 422 of the connecting belt 420 is locked with the connecting belt 420 or the heating sheet 200, the connecting belt 420 forms a pulling force on the locking ring 410, and further makes the two ends of the heating sheet 200 be pulled to maintain a wound state of being close to each other, so as to ensure the stable fitting between the heating sheet 200 and the pipeline 600 and more stable heat conduction. When the free end 422 of the connecting belt 420 is separated from the connecting belt 420 or the heating sheet 200 and disengaged from the locking ring 410, the heating sheet 200 can no longer hold the pipeline 600 tightly, and thus the separation between the heating sheet 200 and the pipeline 600 is realized, and the installation and disassembly are convenient and simple. Preferably, the fastener 430 is one of a magic tape, a snap button, and a buckle, with a simple structure and convenient operation.

[0048] As Figure 3As shown, in this embodiment, the heating sheet 200 includes a heating element 210, an inner protective layer 220, and an outer protective layer 230. The edges of the inner protective layer 220 and the outer protective layer 230 are connected to form a cavity therebetween. The heating element 210 is encapsulated in the cavity formed by the inner protective layer 220 and the outer protective layer 230 to protect the heating element 210. When the heating sheet 200 is wound around the pipeline 600, the heating element 210 is also wound around the pipeline 600 along with the heating sheet 200. The inner protective layer 220 is located between the heating element 210 and the pipeline 600 and is attached to the outer sidewall of the pipeline 600 to separate the heating element 210 from the outer sidewall of the pipeline 600. The outer protective layer 230 is located on the outer peripheral side of the heating element 210 facing away from the pipeline 600 to protect the outer peripheral side of the heating element 210.

[0049] Preferably, the inner protective layer 220 and the outer protective layer 230 are respectively made of one or a combination of PTFE machine cloth (i.e., polytetrafluoroethylene machine cloth), tetrafluoro cloth, silicone cloth, welding cloth, PI film (i.e., polyimide film), and aramid fiber cloth. This enables the inner protective layer 220 and the outer protective layer 230 to have fast heat conduction, high strength, and good insulation performance, avoiding electric leakage of the heating sheet 200 and preventing user electric shock, thereby improving the safety performance of the heating sheet 200. The edges of the inner protective layer 220 and the outer protective layer 230 can be connected by sewing threads or by bonding or other means.

[0050] The heating element 210 in this embodiment can be a flexible heating element. Specifically, a heating wire is selected, enabling the heating element 210 to have a fast temperature rise and high heating efficiency. Of course, a heating film can also be selected for the heating element 210, making the heating area of the heating element 210 large and the heating of the pipeline 600 more uniform.

[0051] The heat insulation sheet 300 in this embodiment includes a heat insulation member 310, an inner heat insulation layer 320, and an outer heat insulation layer 330. The edges of the inner heat insulation layer 320 and the outer heat insulation layer 330 are connected to form a cavity therebetween. The heat insulation member 310 is encapsulated in the cavity formed by the inner heat insulation layer 320 and the outer heat insulation layer 330. When the heat insulation sheet 300 is wrapped around the outside of the heating sheet 200, the inner heat insulation layer 320 is disposed on the inner circle of the heat insulation member 310 to be attached to the heating sheet 200, and the outer heat insulation layer 330 is disposed on the outer peripheral side of the heat insulation member 310 to protect the outer peripheral side of the heat insulation member 310 and prevent damage to the heat insulation member 310, thereby extending the service life of the heat insulation member 310. It should be noted that the inner heat insulation layer 320 and the outer heat insulation layer 330 can also be respectively made of one or a combination of PTFE machine cloth (i.e., polytetrafluoroethylene machine cloth), tetrafluoro cloth, silicone cloth, welding cloth, PI film (i.e., polyimide film), and aramid fiber cloth.

[0052] Preferably, the heat insulation member 310 is made of one or more of PI cotton (polyimide cotton), fiberglass cotton, pre-oxidized fiber, and foamed silica gel. Using the above materials to make the heat insulation member 310 can maintain the soft performance of the heat insulation member 310, so as to facilitate wrapping the heating sheet 200. At the same time, the heat insulation effect of the heat insulation member 310 is good, reducing heat loss, and then ensuring that most of the heat is used for heating and heat preservation of the pipeline 600, saving energy.

[0053] The second locking assembly can have the same structure as the first locking assembly or a different structure. As Figure 5 shown, in this embodiment, a second locking assembly 500 is provided on the heat insulation sheet 300. The second locking assembly 500 has the same structure as the first locking assembly 400. When the heat insulation sheet 300 is wrapped around the outside of the heating sheet 200, the second locking assembly 500 is connected to the outside of the heat insulation sheet 300 to limit and lock the heat insulation sheet 300 through locking. Since the first locking assembly 400 protrudes on the outer surface of the heating sheet 200 to form a bulging portion (not shown), the inner surface of the heat insulation sheet 300 fits the first locking assembly 400 and a part of the heating sheet 200 that serves as the bulging portion and maintains a wound state around the outer peripheral side of the heating sheet 200, ensuring good fit and complete wrapping of the circumferential side of the heating sheet 200 by the heat insulation sheet 300, preventing a large amount of heat from being dissipated from the outer peripheral side of the heating sheet 200, and improving the heat insulation effect.

[0054] In addition, referring to Figure 3 , the bulging portion only surrounds a part of the circumference of the pipeline 600. The opposite ends of the heat insulation sheet 300 can be butted together through the second locking assembly 500 to form a butting position ( Figure 3 the position where the hour hand is at 9 o'clock in Figure 3 ). The butting position is correspondingly arranged (at least partially coincident) with the bulging portion in the circumferential direction of the pipeline 600. This is not conducive to the inner surface of the heat insulation sheet 300 compressing the second locking assembly 500 during the winding process of the heat insulation sheet 300, resulting in poor fit between the heat insulation sheet 300 and the second locking assembly 500 and the heating sheet 200 respectively, causing a large space gap. Therefore, preferably, the butting position ( Figure 3 the position in the interval where the hour hand is approximately from 12 o'clock to 6 o'clock in

[0055] the pipeline 600) is arranged out of alignment with the bulging portion in the circumferential direction of the pipeline 600. In this way, during the winding process of the heat insulation sheet 300, the inner surface of the heat insulation sheet 300 effectively compresses the second locking assembly 500, making the heat insulation sheet 300 have a good fit with the second locking assembly 500 and the heating sheet 200 respectively.In summary, by respectively arranging the first locking assembly 400 and the second locking assembly 500 on the heating plate 200 and the thermal insulation plate 300, during installation, the heating plate 200 can be firstly clamped on the pipeline 600 by the first locking assembly 400, and then the thermal insulation plate 300 can be clamped on the heating plate 200 by the second locking assembly 500, and the locking assemblies of the heating plate 200 and the thermal insulation plate 300 respectively lock each other, so that the heating plate 200 and the pipeline 600 are tightly attached, so that the pipeline 600 is heated evenly and the heating effect is good, and the thermal insulation plate 300 and the heating plate 200 are tightly attached, so that the thermal insulation effect is good.

[0056] Embodiment 2:

[0057] The difference between this embodiment and embodiment one is that, in this embodiment, the outside of the heating plate is not provided with a first locking component, and only the outer side wall of the thermal insulation plate is provided with a second locking component. When the second locking component is locked so that the two ends of the thermal insulation plate are brought together to hold the heating plate, the heating plate is wound around the outer peripheral side of the pipeline under the holding force of the thermal insulation plate to achieve the holding of the heating plate to the pipeline, simplify the structure of the flexible sleeve, and reduce the production cost of the flexible sleeve.

[0058] Embodiment three:

[0059] The difference between this embodiment and the first embodiment is that, in this embodiment, the first locking component is one of Velcro, snaps and buckles. When the heating plate is wrapped around the outside of the pipeline by winding, the two ends of the heating plate that are close to each other can be directly locked by the first locking component, so that the two ends of the heating plate are close to each other to maintain the wound state, ensuring the stable fit between the heating plate and the pipeline. The structure is simple and reliable, and the production and processing difficulty of the first locking component is reduced.

[0060] Embodiment 4:

[0061] like Figure 6 As shown, on the basis of the first embodiment, the heating plate in this embodiment is further provided with a heat-conducting layer 240, and the heat-conducting layer 240 is made of a high thermal conductivity material, such as aluminum in metal. The heat-conducting layer 240 is located on the inner side or the outer side of the inner protective layer 220, and the heat-conducting layer 240 is arranged on the side of the inner protective layer 220 facing the outer protective layer 230, so that the heat-conducting layer 240 is located between the heating element 210 and the inner protective layer 220. The heat generated by the heating element 210 can be evenly transferred to the inner protective layer 220 through the heat-conducting layer 240, and then evenly transferred to the pipeline 600, so that the surrounding side of the pipeline 600 is heated more evenly, and then the material transmitted in the pipeline 600 is heated more evenly, so as to avoid the material transmitted in the pipeline 600 from being unevenly heated and crystallizing in the pipeline 600, thereby ensuring the stable transmission of the material and improving the temperature control accuracy of the heater for heating the pipeline 600.

[0062] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A heater for a pipeline, comprising a flexible sleeve for wrapping the pipeline, characterized in that: The flexible sleeve includes a heating sheet and a heat-insulating sheet that are separately arranged. When the flexible sleeve is installed on the pipeline, the heating sheet is wound around the outer peripheral side of the pipeline, and the inner surface of the heating sheet is attached to the pipeline to heat the pipeline, and the heat-insulating sheet is wound around the outer peripheral side of the heating sheet to wrap the heating sheet.

2. The heater for a pipeline according to claim 1, characterized in that: The flexible sleeve further includes a first locking assembly disposed on the outer surface of the heating sheet, and the first locking assembly is used to lock the heating sheet wrapped around the outer peripheral side of the pipeline.

3. A heater for a pipeline according to claim 2, characterized in that: There are a plurality of the first locking assemblies, and the plurality of first locking assemblies are spaced apart along the length direction of the heating sheet.

4. A heater for a pipeline according to claim 2 or 3, characterized in that: The first locking assembly includes a locking ring and a connecting band disposed on the heating sheet. The connecting band has a mounting end and a free end. The mounting end is fixed to the heating sheet, and the free end passes through the locking ring and is detachably connected to the locking ring through a fastener. Alternatively, the first locking assembly is one of a magic tape, a snap button, and a buckle disposed on the heating sheet. When the heating sheet wraps around the pipeline, the two ends of the heating sheet are detachably connected through the first locking assembly.

5. A heater for a pipeline according to claim 2 or 3, characterized in that: The first locking assembly protrudes on the outer surface of the heating sheet to form a bulging portion. A second locking assembly is disposed on the heat-insulating sheet, and the second locking assembly is used to lock the heat-insulating sheet wrapped around the outer peripheral side of the heating sheet, so that the inner surface of the heat-insulating sheet can be attached to the bulging portion and the heating sheet.

6. The heater for a pipeline according to claim 5, characterized in that: The bulging portion surrounds a part of the circumference of the pipeline. The opposite ends of the heat-insulating sheet can be butted together through the second locking assembly to form a butting position, and the butting position is arranged out of alignment with the bulging portion in the circumferential direction of the pipeline.

7. The heater for a pipeline according to claim 1, characterized in that: The heating sheet includes a heating element, an inner protective layer for attaching to the pipeline, and an outer protective layer disposed opposite to the inner protective layer. The edges of the inner protective layer and the outer protective layer are connected to encapsulate the heating element therebetween.

8. The heater for a pipeline according to claim 7, wherein: The heating element is flexible and can be wound around the outer peripheral side of the pipeline. The heating element is one of a heating film and a heating wire. Alternatively, the heating sheet further includes a heat-conducting layer, and the heat-conducting layer is located on one side of the inner protective layer.

9. A heater for a pipeline according to claim 1, characterized in that: The heat-insulating sheet includes a heat-insulating element and an inner heat-insulating layer and an outer heat-insulating layer that are laminated together. The edges of the inner heat-insulating layer and the outer heat-insulating layer are connected to encapsulate the heat-insulating element therebetween.

Images