Novel skin effect electric heat tracing device

Abstract

The utility model discloses a novel skin effect electric heat tracing device, which relates to the technical field of electric heat tracing, and is characterized in that a heat conduction pipe assembly is arranged in a protective outer pipe along the pipeline direction of a conveying pipeline, and the heat conduction pipe assembly is connected with the conveying pipeline through a heat conduction layer; the heat conduction pipe assembly comprises a plurality of sets of heat conduction pipelines which are arranged and connected in the direction of the conveying pipeline, and every two adjacent sets of heat conduction pipelines are fixed through a deformation wrapping sleeve hoop. According to the designed electric heat tracing device, on the basis of the lock catch combination of the adjacent heat conduction pipelines and the deformation sheaths in the heat conduction pipe assembly, after the adjacent heat conduction pipelines are sequentially and integrally connected, the annular sleeves of the deformation sheaths are tightened, the multiple heat conduction pipelines are integrally connected, the heat conduction pipelines and the skin cable form a complete closed loop, and the electric heat tracing effect is generated; the electric heat tracing device provides heat preservation heat for the conveying pipeline, is convenient and simple in overall assembly, low in installation cost and suitable for the electric heat tracing effect of various conveying pipelines.

Description

Technical Field

[0001] The utility model relates to the field of electric tracing, in particular to a novel skin effect electric tracing device. Background Art

[0002] Skin effect tracing is mostly applied to the thawing of long-distance pipelines, high-temperature pipelines, condensation pipelines, etc. The advantages are high power, long tracing / heating distance for a single power supply point, no emissions / energy saving / environmental protection, and unattended operation. The basic structure of the skin effect electric tracing system is: a ferromagnetic steel pipe is continuously erected parallel to the object to be heated, and a single-core insulated cable of the same length as the pipe runs through the inside of the pipe. The core wire at the end of the cable is firmly crimped to the end of the steel pipe, and the core wire at the head of the cable is connected to the load AC voltage at the head of the pipe. When powered on later, the two-phase alternating current flows from the head of the cable to the end, and then returns from the end along the steel pipe to the head. Due to the fact that the steel pipe is made of ferromagnetic seamless steel pipe, due to the proximity effect of alternating current and the skin effect of the pipe, the current flowing through the steel pipe is concentrated on the inner wall of the steel pipe to form eddy current heating. At the same time, since the outer wall of the steel pipe and the ground are at the same potential, there is no need to make an insulating layer on the outer layer of the steel pipe, and the eddy current heat can be exchanged with the outside through the outer wall, so as to achieve the heating / tracing effect.

[0003] Since the electric tracing pipeline is generally long, the electric tracing pipes are usually assembled and connected in a segmented form. As shown in a skin effect electric tracing device with segmented variable power (publication number CN215522426U) disclosed on the Chinese Patent Network, such a device is provided with an intermediate junction box between adjacent heat-collecting steel pipes as a node of its series circuit to form a complete closed-loop state with the cable to control the electrothermal effect at different positions.

[0004] However, for the above-mentioned disclosed patents and the electric tracing devices adopted in the existing market, there are still some deficiencies: the existing method of using junction boxes as power nodes for numerous point tracing pipes can more conveniently control the electric tracing effect at each stage, but its installation cost is high, the installation operation is more cumbersome, and the daily maintenance cost is high. Especially for long-distance conveying pipelines, the adaptability is relatively low. For this reason, technical personnel in the field have provided a novel skin effect electric tracing device to solve the problems raised in the above background art. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a novel skin effect electric tracing device, which solves the problems of high installation cost and cumbersome installation of the existing electric tracing device mentioned in the above background art.

[0006] To achieve the above object, the present utility model is realized through the following technical solutions: A new type of skin effect electric tracing device, including a protective outer pipe and a conveying pipe sleeved on the middle part of the protective outer pipe;

[0007] Inside the protective outer pipe, a heat conduction pipe assembly is arranged along the pipeline direction of the conveying pipe, and the heat conduction pipe assembly is connected to the conveying pipe through a heat conduction layer. A skin effect cable is connected through the inside of the pipeline of the heat conduction pipe assembly;

[0008] The heat conduction pipe assembly includes a plurality of heat conduction pipes arranged and connected in sequence along the conveying pipe direction, and adjacent two groups of heat conduction pipes are fixed through a deformation sleeve hoop. At both ends of the pipeline of the heat conduction pipe, outward extension flanges arranged horizontally are provided, and the inside of the pipeline of the heat conduction pipe is filled with a cable core sleeve that is guided to the skin effect cable.

[0009] As a further technical solution of the present utility model: The outward extension flange is an arc surface structure, and the radian size of the outward extension flange is 90° relative to the center of the pipeline of the heat conduction pipe.

[0010] As a further technical solution of the present utility model: A locking jack is penetrated and opened in the middle of the convex platform of the outward extension flange, and locking buckles adapted to the locking jack are arranged in a pair of included angle forms inside the ring sleeve of the deformation sleeve.

[0011] As a further technical solution of the present utility model: The cable core sleeve includes an outer support sleeve and an inner support sleeve, and the outer support sleeve and the inner support sleeve are integrally connected through support ribs arranged in a star-delta symmetric arrangement.

[0012] As a further technical solution of the present utility model: A heat insulation layer is filled between the protective outer pipe and the conveying pipe, and the heat insulation layer is a polyurethane heat insulation material.

[0013] As a further technical solution of the present utility model: The heat conduction layer is a heat conduction mud material.

[0014] The present utility model provides a new type of skin effect electric tracing device, which has the following beneficial effects compared with the prior art:

[0015] For the electric tracing device of this design, based on the lock combination of adjacent heat conduction pipes and the deformation sleeve in the heat conduction pipe assembly, after connecting adjacent heat conduction pipes in sequence, the ring sleeve of the deformation sleeve is tightened to connect many heat conduction pipes together, forming a complete closed loop with the skin effect cable, generating an electric tracing effect, providing heat insulation heat for the conveying pipe. While its overall assembly is convenient and simple, the installation cost is relatively low, which is suitable for the electric tracing effect of various conveying pipes. And when the skin effect cable is penetrated and towed, through the central guiding and towing of the cable core sleeve, it can be penetrated and towed and installed in a central overhead installation manner, avoiding fitting with the heat conduction pipe and reducing the influence of heat. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a new type of skin effect electric tracing device;

[0017] Figure 2 It is a schematic structural diagram of a heat conduction pipe assembly in a new type of skin effect electric tracing device;

[0018] Figure 3 It is a disassembly and assembly schematic diagram of a heat conduction pipe assembly in a new type of skin effect electric tracing device;

[0019] Figure 4 It is a schematic structural diagram of a cable core sleeve in a new type of skin effect electric tracing device.

[0020] In the figure: 1. Protective outer pipe; 2. Conveying pipeline; 3. Thermal insulation layer; 4. Heat conduction layer; 5. Heat conduction pipe assembly; 51. Heat conduction pipeline; 52. Deformation sleeve; 53. Locking buckle; 54. Extension flange; 55. Locking jack; 56. Cable core sleeve; 561. Outer support sleeve; 562. Inner support sleeve; 563. Support rib; 6. Skin effect cable. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , the present invention provides a technical solution for a new type of skin effect electric tracing device: a new type of skin effect electric tracing device, including a protective outer pipe 1 and a conveying pipeline 2 sleeved in the middle of the pipe of the protective outer pipe 1. A thermal insulation layer 3 is filled between the protective outer pipe 1 and the conveying pipeline 2, and the thermal insulation layer 3 is a polyurethane thermal insulation material. By filling the thermal insulation layer 3 of polyurethane thermal insulation material between the protective outer pipe 1 and the conveying pipeline 2, on the one hand, it can play a heat preservation role to avoid heat loss, and on the other hand, it can play an elastic cushion protection performance to reduce the impact of external impacts.

[0023] A heat-conducting pipe assembly 5 is arranged inside the protective outer tube 1 along the pipeline direction of the conveying pipeline 2. The heat-conducting pipe assembly 5 includes a plurality of groups of heat-conducting pipes 51 arranged and connected along the pipeline direction of the conveying pipeline 2, and two adjacent groups of heat-conducting pipes 51 are fixed by a deformation sleeve 52 ring hoop. Both ends of the heat-conducting pipe 51 are provided with horizontally arranged extension flanges 54, and the extension flange 54 is a curved surface structure, and the curvature of the extension flange 54 is 90° relative to the pipeline center of the heat-conducting pipe 51. By setting the extension flange 54 as a 90° curved surface structure, when the two adjacent groups of heat-conducting pipes 51 are assembled as a whole, the adjacent extension flanges 54 are dislocated and docked to make the adjacent heat-conducting pipes 51 assembled and connected in sequence to form a tight assembly state, and then the deformation sleeve 52 is tightened by a clamp to fix its ring sleeve on the adjacent heat-conducting pipes 51, so that the adjacent heat-conducting pipes 51 can be installed as a whole, and the assembly is simple and convenient, and the cost is low.

[0024] A locking socket 55 is provided through the middle of the boss of the extended flange 54, and a locking buckle 53 matched with the locking socket 55 is provided at an angle inside the annular sleeve of the deformation sleeve 52. When the matched extended flange 54 is tightened and positioned by using the deformation sleeve 52, the locking buckle 53 on its inner wall corresponds to the buckle of the locking socket 55 on the extended flange 54, and the locking buckle 53 is pressed into the locking socket 55 to form a stable locking state, so that the adjacent heat transfer pipes 51 are tightly connected to form a stable conduction state.

[0025] The interior of the heat-conducting pipe 51 is filled with a cable core sleeve 56 that guides the skin-collecting cable 6. The interior of the pipe of the heat-conducting pipe assembly 5 is connected through the skin-collecting cable 6. The cable core sleeve 56 includes an outer support sleeve 561 and an inner support sleeve 562, and the outer support sleeve 561 and the inner support sleeve 562 are integrally connected via support ribs 563 that are symmetrically arranged in a star-triangle shape. By utilizing the inner lining of the cable core sleeve 56, the skin-collecting cable 6 that is pulled through the inside of the heat-conducting pipe assembly 5 can be centrally supported overhead, thereby preventing the skin-collecting cable 6 from fitting against the heat-conducting pipe assembly 5, and allowing the heat on the heat-conducting pipe assembly 5 to be transferred to the skin-collecting cable 6.

[0026] The heat-conducting pipe assembly 5 is connected to the conveying pipeline 2 through a heat-conducting layer 4, and the heat-conducting layer 4 is made of a heat-conducting mud material. The heat-conducting layer 4 of the heat-conducting mud material has good thermal conductivity on the one hand, and can quickly transfer the electric heat of the heat-conducting pipe assembly 5 to the conveying pipeline 2 to achieve an electric heating effect. On the other hand, it has good plasticity and can limit the installation position of the heat-conducting pipe assembly 5.

[0027] The working principle of the present utility model is as follows: when using the electric tracing device as the electric tracing component of the conveying pipeline 2, first, by means of the misaligned butt joint of adjacent outward flange 54, the adjacent heat conduction pipelines 51 are integrally assembled and connected in sequence to form a tightly fitting assembled state. Then, by using pliers to tighten the deformation sleeve 52, it is sleeved and fixed on the adjacent heat conduction pipelines 51. Subsequently, in this way, the overall assembled length of the heat conduction pipe assembly 5 is set to be flush with the length of the conveying pipeline 2. And during the assembly, the matching skin-effect cable 6 is drawn out in a central overhead manner from inside the cable core sleeve 56 in the heat conduction pipe assembly 5 to prevent the skin-effect cable 6 from being in contact with the heat conduction pipe assembly 5, so that the heat on the heat conduction pipe assembly 5 is not transferred to the skin-effect cable 6;

[0028] Furthermore, based on the shaping effect of the heat conduction layer 4 made of heat conduction mud material, the combination of the heat conduction pipe assembly 5 and the skin-effect cable 6 is assembled on one side of the conveying pipeline 2. Then, by using the sleeve of the heat preservation layer 3 and the outer sleeve of the protective outer pipe 1, the overall structure of the electric tracing device is integrally assembled with the conveying pipeline 2;

[0029] When the conveying pipeline 2 is electrically heated subsequently, based on the electric heating effect of the skin-effect cable 6 and the heat conduction pipe assembly 5, the heat is conducted to the conveying pipeline 2 through the heat conduction layer 4 to achieve the electric tracing effect. Its overall structure is simple and convenient to install, and the installation cost is relatively low, which is suitable for the electric tracing work of a relatively long conveying pipeline 2.

[0030] The above is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model are implemented according to the conventional means in this field without special instructions and limitations.

Claims

1. A new type of skin effect electric heating device, characterized in that: It comprises a protective outer tube (1) and a conveying pipeline (2) sheathed in the middle of the protective outer tube (1); A heat conducting pipe assembly (5) is arranged inside the protective outer pipe (1) along the pipeline direction of the conveying pipeline (2), and the heat conducting pipe assembly (5) is connected to the conveying pipeline (2) via a heat conducting layer (4), and a skin-collecting cable (6) is connected through the pipeline of the heat conducting pipe assembly (5); The heat-conducting pipe assembly (5) comprises a plurality of groups of heat-conducting pipes (51) arranged and connected along the pipe direction of the conveying pipe (2), and two adjacent groups of heat-conducting pipes (51) are fixed by means of a deformable sheath (52) hoop, both ends of the heat-conducting pipes (51) are provided with horizontally arranged extension flanges (54), and the interior of the heat-conducting pipes (51) is filled with a cable core sheath (56) guided by the skin-collecting cable (6).

2. A novel skin effect electric heating device according to claim 1, characterized in that: The extension flange (54) is a curved surface structure, and the curvature of the extension flange (54) is 90° relative to the center of the heat-conducting pipe (51).

3. A novel skin effect electric heating device according to claim 1, characterized in that: A locking socket (55) is provided through the middle of the boss of the extended flange (54), and a locking buckle (53) adapted to the locking socket (55) is provided in an angled manner inside the annular sleeve of the deformation sleeve (52).

4. A novel skin effect electric heating device according to claim 1, characterized in that: The cable core sleeve (56) comprises an outer support sleeve (561) and an inner support sleeve (562), and the outer support sleeve (561) and the inner support sleeve (562) are integrally connected via support ribs (563) that are symmetrically arranged in a star-triangle shape.

5. A novel skin effect electric heating device according to claim 1, characterized in that: A thermal insulation layer (3) is filled between the protective outer tube (1) and the conveying pipeline (2), and the thermal insulation layer (3) is a polyurethane thermal insulation material.

6. A novel skin effect electric heating device according to claim 1, characterized in that: The heat conducting layer (4) is made of heat conducting mud material.

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