Electric heat tracing device for pipeline based on thermal power compensation

Abstract

The application discloses a pipeline electric heat tracing device based on heat work compensation and belongs to the technical field of electric heat tracing devices. The pipeline electric heat tracing device comprises a reinforcing shell, a pipe laying device, a wire feeding device, a wire collecting device, a skin effect cable and a driving device. The heat tracing mode of the application is to break the core of each heat tracing steel pipe, and the heat tracing steel pipes are independent of each other. The automatic arrangement of the heat tracing steel pipes and the skin effect cable is realized by the pipe laying device, so that the heating of the surrounding of the pipeline is more uniform. When special-shaped equipment such as a filter and a valve appears in the pipeline, the skin effect cable is lengthened by the cooperation of the wire collecting device and the wire feeding device, and is freely wound on the special-shaped equipment, so that the problem that the special-shaped equipment is difficult to heat is overcome. The whole pipe laying device and the reinforcing shell are designed to be detachable, each pipe laying device is disconnected for replacement of the heat tracing steel pipe, and even if the heat tracing steel pipe has a cavity, subsequent dismounting or cutting of the heat tracing steel pipe does not affect the operation of the whole heat tracing loop.

Description

Technical Field

[0001] This invention relates to the field of electric heat tracing devices, specifically to an electric heat tracing device for pipelines based on heat work compensation. Background Technology

[0002] When alternating current passes through a conductor, the current density varies across the conductor's cross-section. The current density is more concentrated near the conductor's surface than inside. Furthermore, as the frequency of the alternating current and the magnetic permeability of the conductor material increase, the current becomes more concentrated towards the conductor's surface. This phenomenon is known in electromagnetism as the "skin effect," and it is used to design skin tracing systems for heating pipes.

[0003] In a conventional skin-collecting electric heat tracing system, the heat-tracing steel pipe itself is a continuous, uninterrupted part of a two-wire circuit. Furthermore, there is a high current density on the inner wall of the pipe. If the pipe forming the current circuit has large cracks, voids, or if weld points corrode and detach, the entire two-wire circuit of the skin-collecting electric heat tracing system will be interrupted. Therefore, conventional skin-collecting electric heat tracing pipelines require very strict construction quality and have high requirements for the pipe materials themselves.

[0004] In addition, conventional skin-type electric heat tracing systems are two-wire systems. When encountering irregularly shaped areas such as expansion joints, ball valves or gate valves, filters, and insulating flanges in process pipelines that require heating / heat tracing, it is often necessary to avoid or add auxiliary heat tracing facilities. Otherwise, the medium temperature in that area may drop or condense due to insufficient local heat tracing power. Summary of the Invention

[0005] The purpose of this invention is to provide an electric heat tracing device for pipelines based on thermal energy compensation, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A pipeline electric heat tracing device based on thermal compensation includes a reinforced shell, a pipe-laying device, a wire-feeding device, a wire-gathering device, a skin-collecting cable, and a drive device. Several pipe-laying devices are installed inside the reinforced shell. The drive device is installed at one end of the reinforced shell. Both ends of the skin-collecting cable pass through the wire-gathering device. Both ends of the skin-collecting cable are equipped with a wire-feeding device and a wire-gathering device. The skin-collecting cable is used to heat the pipeline. The wire-gathering device is used to collect the skin-collecting cable. The wire-feeding device is used to transport and return the skin-collecting cable. The pipe-laying device is used to heat the pipeline and to evenly wind the skin-collecting cable around the pipeline. The drive device provides power to the pipe-laying device. The skin-collecting cable itself has resistance and an insulating layer on its surface. Under a given voltage, current flows through the skin-collecting cable, causing it to self-heat. Each pipe-laying device is disconnected, so even if the heat-tracing steel pipe has voids, or if the heat-tracing steel pipe is subsequently disassembled or cut, the operation of the entire heat tracing circuit will not be affected.

[0007] Both ends of the skin-collecting cable are connected to the power junction box. The power junction box is connected in series with the power distribution control cabinet, the power distribution transformer, the AC power supply, and the control system. The control system controls the operation of the cable delivery device, the cable collection device, the drive device, the power distribution control cabinet, the power distribution transformer, and the AC power supply. In addition to the requirement that the skin-collecting heating steel pipes be welded together to maintain electrical continuity, conventional skin-collecting steel pipe junction boxes at both ends are required to be made of ferromagnetic materials with properties similar to those of the skin-collecting heating steel pipes. This invention does not have special requirements for the material of the junction boxes.

[0008] The pipe-laying device includes a gear ring, a grooved ring, an upper holding segment, a heat-tracing steel pipe, and a lower holding segment. The upper and lower holding segments are connected, and a heat-tracing steel pipe is installed on both the upper and lower holding segments. The grooved ring is installed on the upper and lower holding segments, and the gear ring is installed on the upper and lower holding segments.

[0009] After the cable delivery device transports the fiber optic cable to the pipe-laying device, the control system starts the third motor. The output shaft of the third motor drives the transmission gear on the transmission rod to rotate. The transmission gear, through the gear ring, causes the pipe-laying device to rotate. As the number of teeth on the transmission gear gradually increases, the pipe-laying device closer to the third motor rotates at a greater angle than the pipe-laying device farther from the third motor, eventually causing the heat-tracing steel pipe inside the pipe-laying device to become misaligned. When the heat-tracing steel pipe is rotated by the upper and lower holding pipe segments, it will drive the fiber optic cable inside to be evenly wound around the surface of the pipe. When there are irregularly shaped devices such as filters or valves in the pipeline, the fiber optic cable is stretched and freely wound around the irregularly shaped device through the cooperation of the cable collection device and the cable delivery device.

[0010] When the pipeline is shortened due to changes, the control system causes the second motor to rotate in reverse. The reverse rotation of the second motor drives the entire cable delivery device to rotate in reverse, causing the heat-tracing cable to be retracted into the cable collection device. At this time, the control system controls the third motor to rotate in reverse, causing the heat-tracing cable to be wound back into the cable collection device. After the heat-tracing steel pipe and heat-tracing cable are laid, the control system shuts down the drive device, cable delivery device, and cable collection device and turns on the AC power.

[0011] The cable management device includes a cable junction box, a first cable reel, a second cable reel, and a first motor. A bearing is installed at the bottom of the first cable reel, which is mounted inside the cable junction box via the bearing. A connecting rod is installed at the bottom of the second cable reel, with the other end of the connecting rod passing through the first cable reel and connecting to the cable junction box. The first motor is mounted inside the cable junction box, and a gear is installed on the output shaft of the first motor. The gear is rotatably connected to the bearing via a belt. The cable runs through the cable junction box.

[0012] The control system starts the first motor and the second motor. The gear on the output shaft of the first motor drives the first reel to rotate via a belt. The third roller, under the action of a compression spring, presses the cable together via a conveyor belt. The second motor drives the first roller to rotate. The first roller drives the second roller to roll via a conveyor belt. Driven by the first and second rollers, the cable is transported forward into the pipe-laying device.

[0013] The wire feeding device includes a second motor, a conveyor belt, sleeve rods, a compression spring, a spring connecting rod, a wire feeding box, a first roller, a second roller, and a third roller. The second motor is installed inside the wire feeding box, and the first roller is mounted on the output shaft of the second motor. The second roller is mounted inside the wire feeding box via a connecting rod. Sleeve rods are mounted on both sides of the third roller. One end of the spring connecting rod is connected to the wire feeding box, and the other end of the spring connecting rod passes through the compression spring and enters the hole in the sleeve rod. A conveyor belt is mounted on the third roller, and the first roller is rotatably connected to the second roller via the conveyor belt. The wire feeding cable passes through the wire feeding box.

[0014] The drive unit includes: a third motor, a motor housing, a transmission rod, and transmission gears. The motor housing is installed at one end of the reinforced outer shell. The third motor is installed inside the motor housing. The transmission rod is installed on the output shaft of the third motor. The transmission rod passes through the reinforced outer shell. Several transmission gears with increasing tooth counts are installed on the transmission rod. The transmission gears mesh with a gear ring for transmission.

[0015] The upper gripping tube segment has a protruding block, and the lower gripping tube segment has a recessed block. One end of the protruding block has a buckle, and the other end of the recessed block has a slot. The protruding block and the recessed block allow the upper and lower gripping tube segments to fit together. The buckle and the slot prevent the upper and lower gripping tube segments from shifting back and forth. To disassemble, lift the buckle upwards and slide the upper and lower gripping tube segments back and forth to separate them.

[0016] Ball bearings are embedded at corresponding positions on the sidewalls of the reinforced outer shell and the grooves on the grooved ring, forming a ball bearing structure with the grooved ring. Driven by the drive unit, the pipe-laying device rotates within the reinforced outer shell.

[0017] The cable is wound clockwise and fixed on the first reel, and the cable is wound counterclockwise and fixed on the second reel. This winding method allows the cable to rotate and extend freely at one end while the other end remains fixed.

[0018] Temperature sensors are installed inside the pipe-laying equipment. The temperature sensors convert changes in pipe temperature into electrical signals, which are then transmitted to the control system. The control system analyzes the temperature levels and adjusts the AC power supply accordingly to achieve automatic temperature control.

[0019] The heat tracing steel pipe is made of ferromagnetic material, and the upper and lower holding plates are made of insulating material.

[0020] Based on the principle of induced electromotive force generated by the cutting of conductors by magnetic field lines, the heat tracing steel pipe has a small volume resistance. Therefore, when the heat tracing steel pipe is closed, a current is generated by the induced electromotive force. The current generates eddy currents along the circular cross-section of the heat tracing steel pipe. Eddy current loss causes the heat tracing steel pipe to release heat. In addition, due to the magnetization of the heat tracing steel pipe by the alternating magnetic field, a hysteresis effect is generated. Under the influence of the hysteresis effect, the heat tracing steel pipe will also release heat.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) The present invention uses a heat tracing method with a breakpoint core, and each heat tracing steel pipe is disconnected and independent from each other. There is no large current flowing through the conventional skin circuit, which makes the heat tracing device safer. The device completes the automatic laying of heat tracing steel pipe and skin cable through the laying device, realizes automated laying, and heats the area around the pipe more evenly.

[0022] (2) When there are irregularly shaped devices such as filters and valves in the pipeline, the skin-collecting cable can be stretched and freely wound around the irregularly shaped device by the cooperation of the hub device and the wire delivery device, which avoids the situation that the conventional skin-collecting heat tracing pipe cannot be wound around the above-mentioned devices, resulting in insufficient heat tracing power; it also avoids the situation that the skin-collecting electric heat tracing pipe needs to be cut off when disassembling or replacing the above-mentioned pipeline equipment.

[0023] (3) Easy and quick installation and disassembly. The entire pipe laying device and the reinforced shell are designed to be detachable. The upper and lower holding pipe segments are connected by protrusions and grooves. The buckles and slots are used to prevent the upper and lower holding pipe segments from moving back and forth. When disassembling, lift the buckle upward and slide the upper and lower holding pipe segments back and forth to separate them. Each pipe laying device is disconnected. Even if there are holes in the heat tracing steel pipe, or if the heat tracing steel pipe is disassembled or cut off later, it will not affect the operation of the entire heat tracing circuit. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is an overall elevation view of the electric heat tracing device of the present invention;

[0026] Figure 2 This is a half-sectional view of the electric heat tracing device of the present invention;

[0027] Figure 3 This is an unfolded view of the pipe-laying device of the present invention;

[0028] Figure 4 This is an elevation view of the pipe-laying device of the present invention;

[0029] Figure 5This is a half-sectional view of the hub device of the present invention;

[0030] Figure 6 This is a half-sectional view of the wire feeding device of the present invention;

[0031] Figure 7 This is a partial detailed view of the segment holding method according to the present invention;

[0032] Figure 8 This is a partial detailed view of the segment holding mechanism in this invention;

[0033] Figure 9 This is a circuit diagram of the electric heat tracing device of the present invention;

[0034] In the diagram: 1. Reinforced outer casing; 2. Pipe laying device; 3. Cable delivery device; 4. Cable gathering device; 5. Skin-supporting cable; 6. Drive device; 7. Power junction box; 8. Power distribution control cabinet; 9. Power distribution transformer; 10. AC power supply; 21. Gear ring; 22. Grooved ring; 23. Upper holding segment; 24. Heated steel pipe; 25. Lower holding segment; 41. Junction box; 42. First cable reel; 43. Second cable reel; 44. First motor; 31. Second motor; 32. Conveyor belt; 33. Sleeve rod; 34. Compression spring; 35. Spring connecting rod; 36. Cable delivery box; 37. First roller; 38. Second roller; 39. Third roller; 61. Third motor; 62. Motor housing; 63. Transmission rod; 64. Transmission gear; 231. Buckle; 232. Protrusion; 251. Slot; 252. Groove block. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-9This invention provides a technical solution: a pipeline electric heat tracing device based on thermal compensation includes a reinforced outer shell 1, a pipe-laying device 2, a wire-feeding device 3, a wire-gathering device 4, a skin-collecting cable 5, and a drive device 6. Several pipe-laying devices 2 are installed inside the reinforced outer shell 1. The drive device 6 is installed at one end of the reinforced outer shell 1. Both ends of the skin-collecting cable 5 pass through the wire-gathering device 4. Both ends of the skin-collecting cable 5 are equipped with the wire-feeding device 3 and the wire-gathering device 4. The skin-collecting cable 5 is used to heat the pipeline. The wire-gathering device 4 is used to collect the skin-collecting cable 5. The wire-feeding device 3 is used to transport and return the skin-collecting cable 5. The pipe-laying device 2 is used to heat the pipeline and to evenly wind the skin-collecting cable 5 around the pipeline. The drive device 6 provides power to the pipe-laying device 2. A temperature sensor is installed inside the pipe-laying device 2. The temperature sensor converts changes in pipeline temperature into electrical signals and transmits them to the control system. The control system analyzes the temperature levels to control the strength of the AC power supply, achieving automatic temperature control. Both ends of the cable 5 are connected to the power supply junction box 7. The power supply junction box 7 is connected in series with the power distribution control cabinet 8, the power distribution transformer 9, the AC power supply 10 and the control system. The control system controls the operation of the cable feeding device 3, the cable gathering device 4, the drive device 6, the power distribution control cabinet 8, the power distribution transformer 9 and the AC power supply 10.

[0037] The cable management device 4 includes a cable collection box 41, a first cable reel 42, a second cable reel 43, and a first motor 44. A bearing is mounted on the bottom of the first cable reel 42, which is installed inside the cable collection box 41 via the bearing. A connecting rod is mounted on the bottom of the second cable reel 43, with the other end of the connecting rod passing through the first cable reel 42 and connecting to the cable collection box 41. The first motor 44 is installed inside the cable collection box 41, and a gear is mounted on the output shaft of the first motor 44. The gear is rotatably connected to the bearing via a belt. The cable 5 passes through the cable collection box 41. The cable 5 is wound clockwise and fixed to the first cable reel 42, and wound counterclockwise and fixed to the second cable reel 43. This winding method allows the cable 5 to rotate and extend freely at one end while the other end remains fixed.

[0038] The wire feeding device 3 includes a second motor 31, a conveyor belt 32, a sleeve rod 33, a compression spring 34, a spring connecting rod 35, a wire feeding box 36, a first roller 37, a second roller 38, and a third roller 39. The second motor 31 is installed inside the wire feeding box 36. The first roller 37 is installed on the output shaft of the second motor 31. The second roller 38 is installed inside the wire feeding box 36 through a connecting rod. Sleeve rods 33 are installed on both sides of the third roller 39. One end of the spring connecting rod 35 is connected to the wire feeding box 36, and the other end of the spring connecting rod 35 passes through the compression spring 34 and enters the hole of the sleeve rod 33. The conveyor belt 32 is installed on the third roller 39. The first roller 37 is rotatably connected to the second roller 38 through the conveyor belt 32. The skin-feeding cable 5 passes through the wire feeding box 36.

[0039] The control system starts the first motor 44 and the second motor 31. The gear on the output shaft of the first motor 44 drives the first reel 42 to rotate via the belt. The third roller 39, under the action of the compression spring 34, presses the cable 5 through the conveyor belt 32. The second motor 31 drives the first roller 37 to rotate. The first roller 37 drives the second roller 38 to roll via the conveyor belt 32. Driven by the first roller 37 and the second roller 38, the cable is transported forward into the pipe laying device 2.

[0040] The pipe-laying device 2 includes a gear ring 21, a grooved ring 22, an upper holding pipe segment 23, a heat-tracing steel pipe 24, and a lower holding pipe segment 25. The upper holding pipe segment 23 and the lower holding pipe segment 25 are connected, and a heat-tracing steel pipe 24 is installed on both the upper holding pipe segment 23 and the lower holding pipe segment 25. The grooved ring 22 is installed on the upper holding pipe segment 23 and the lower holding pipe segment 25, and the gear ring 21 is installed on the upper holding pipe segment 23 and the lower holding pipe segment 25. The heat-tracing steel pipe 24 is made of ferromagnetic material, and the upper holding pipe segment 23 and the lower holding pipe segment 25 are made of insulating material. A protrusion 232 is installed on the upper holding pipe segment 23, and a groove 252 is installed on the lower holding pipe segment 25. A buckle 231 is installed at one end of the protrusion 232, and a slot 251 is installed at one end of the groove 252. The protrusion 232 and the groove 252 make the upper holding tube 23 and the lower holding tube 25 fit together. The buckle 231 and the slot 251 are used to prevent the upper holding tube 23 and the lower holding tube 25 from moving back and forth. When disassembling, the buckle 231 is lifted upward and the upper holding tube 23 and the lower holding tube 25 are slid back and forth to separate the upper holding tube 23 and the lower holding tube 25.

[0041] The drive unit 6 includes a third motor 61, a motor housing 62, a transmission rod 63, and transmission gears 64. The motor housing 62 is mounted on one end of the reinforced outer shell 1. The third motor 61 is installed inside the motor housing 62. The transmission rod 63 is mounted on the output shaft of the third motor 61 and passes through the reinforced outer shell 1. Several transmission gears 64 with increasing tooth counts are mounted on the transmission rod 63, and the transmission gears 64 mesh with the gear ring 21 for transmission. Ball bearings are embedded at corresponding positions on the side wall of the reinforced outer shell 1 and the groove on the grooved ring 22, forming a ball bearing structure. Under the drive of the drive unit 6, the pipe-laying device 2 rotates within the reinforced outer shell 1.

[0042] After the cable delivery device 3 delivers the fiber optic cable to the pipe laying device 2, the control system starts the third motor 61. The output shaft of the third motor 61 drives the transmission gear 64 on the transmission rod 63 to rotate. The transmission gear 64 causes the pipe laying device 2 to rotate through the gear ring 21. As the number of teeth of the transmission gear 64 gradually increases, the rotation angle of the pipe laying device 2 closer to the third motor 61 is greater than that of the pipe laying device 2 farther away from the third motor 61, eventually causing the heat tracing steel pipe 24 inside the pipe laying device 2 to be misaligned. When the heat tracing steel pipe 24 is rotated by the upper holding pipe piece 23 and the lower holding pipe piece 25, it will drive the fiber optic cable 5 inside to be evenly wound around the surface of the pipe. When there are irregularly shaped devices such as filters or valves in the pipeline, the fiber optic cable 5 is stretched and freely wound around the irregularly shaped device through the cooperation of the cable collection device 4 and the cable delivery device 3.

[0043] When the pipeline is shortened due to changes, the control system causes the second motor 31 to rotate in the reverse direction. The reverse rotation of the second motor 31 drives the entire cable delivery device 3 to rotate in the reverse direction, causing the heat-collecting cable 5 to be retracted into the cable collection device 4. At this time, the control system controls the third motor 61 to rotate in the reverse direction, causing the heat-collecting cable 5 to be wound back into the cable collection device 4. After the heat-tracing steel pipe 24 and the heat-collecting cable 5 are laid, the control system shuts down the drive device 6, the cable delivery device 3 and the cable collection device 4 and turns on the AC power.

[0044] A single skin-collecting cable 5 is threaded through the inner wall of the heat-tracing steel pipe 24. When an alternating current flows through the skin-collecting cable 5, the alternating magnetic flux generated by the current passes through the inner wall of the heat-tracing steel pipe 24, which has a certain wall thickness. Based on the principle of induced electromotive force generated by the cutting of conductors by magnetic lines of force, and due to the small volume resistance of the heat-tracing steel pipe 24, a current is generated when the heat-tracing steel pipe 24 is closed due to the drive of the induced electromotive force. The current generates eddy currents along the circular cross-section of the heat-tracing steel pipe 24, and the eddy current losses cause the heat-tracing steel pipe 24 to release heat. In addition, due to the magnetization of the heat-tracing steel pipe 24 by the alternating magnetic field, a hysteresis effect is generated. Under the influence of the hysteresis effect, the heat-tracing steel pipe 24 also releases heat. The skin-collecting cable 5 itself has resistance and an insulating layer on its surface. Under a given voltage, current flows through the skin-collecting cable 5, causing the skin-collecting cable 5 to generate heat. The heat-tracing steel pipe 24 releases heat under the action of eddy currents and hysteresis, and together with the heat generated by the skin-collecting cable 5 itself, the three form a heating circuit carrier, achieving the purpose of heating the pipeline.

[0045] The working principle of this invention is as follows: The control system starts the first motor 44 and the second motor 31. The gear on the output shaft of the first motor 44 drives the first reel 42 to rotate through the belt. The third roller 39, under the action of the compression spring 34, presses the cable 5 through the conveyor belt 32. The second motor 31 drives the first roller 37 to rotate. The first roller 37 drives the second roller 38 to roll through the conveyor belt 32. Driven by the first roller 37 and the second roller 38, the cable is transported forward into the pipe laying device 2.

[0046] After the cable delivery device 3 delivers the fiber optic cable to the pipe-laying device 2, the control system starts the third motor 61. The output shaft of the third motor 61 drives the transmission gear 64 on the transmission rod 63 to rotate. The transmission gear 64 rotates the pipe-laying device 2 through the gear ring 21. As the number of teeth on the transmission gear 64 gradually increases, the rotation angle of the pipe-laying device 2 closer to the third motor 61 is greater than that of the pipe-laying device 2 farther away from the third motor 61, eventually causing the heat tracing steel pipe 24 inside the pipe-laying device 2 to become misaligned. When the heat tracing steel pipe 24 is rotated by the upper holding plate 23 and the lower holding plate 25... The system will work together to evenly wind the internal heat-tracing cable 5 around the pipe surface. When irregularly shaped equipment such as filters or valves appear in the pipeline, the heat-tracing cable 5 will be stretched and freely wound around the irregularly shaped equipment through the cooperation of the cable gathering device 4 and the cable delivery device 3. When the pipeline changes and shortens, the control system will cause the second motor 31 to rotate in the reverse direction. The reverse rotation of the second motor 31 will drive the entire cable delivery device 3 to rotate in the reverse direction, causing the heat-tracing cable 5 to be retracted into the cable gathering device 4. At this time, the control system will control the third motor 61 to rotate in the reverse direction, causing the heat-tracing cable 5 to be wound back into the cable gathering device 4. After the heat-tracing steel pipe 24 and the heat-tracing cable 5 are laid, the control system will shut down the drive device 6, the cable delivery device 3 and the cable gathering device 4 and turn on the AC power. After power is turned on, the heat-tracing steel pipe 24 will release heat under the action of eddy currents and hysteresis. Combined with the heat generated by the heat-tracing cable 5 itself, the three form a heating circuit carrier to achieve the purpose of heating the pipeline.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipeline electric heat tracing device based on thermal work compensation, characterized in that: The electric heat tracing device includes a reinforced shell (1), a pipe laying device (2), a wire feeding device (3), a wire gathering device (4), a skin-collecting cable (5), and a driving device (6). Several pipe laying devices (2) are installed inside the reinforced shell (1). A driving device (6) is installed at one end of the reinforced shell (1). Both ends of the skin-collecting cable (5) pass through the wire gathering device (4). Both ends of the skin-collecting cable (5) are equipped with a wire feeding device (3) and a wire gathering device (4). The skin-collecting cable (5) is used to heat the pipe. The wire gathering device (4) is used to collect the skin-collecting cable (5). The wire feeding device (3) is used to transport and return the skin-collecting cable (5). The pipe laying device (2) is used to heat the pipe and make the skin-collecting cable (5) evenly wound on the pipe. The driving device (6) is used to provide power to the pipe laying device (2). The pipe-laying device (2) includes a gear ring (21), a grooved ring (22), an upper holding pipe segment (23), a heat tracing steel pipe (24), and a lower holding pipe segment (25). The upper holding pipe segment (23) and the lower holding pipe segment (25) are connected. A heat tracing steel pipe (24) is installed on both the upper holding pipe segment (23) and the lower holding pipe segment (25). The grooved ring (22) is installed on the upper holding pipe segment (23) and the lower holding pipe segment (25). The gear ring (21) is installed on the upper holding pipe segment (23) and the lower holding pipe segment (25). The drive device (6) includes: a third motor (61), a motor housing (62), a transmission rod (63), and a transmission gear (64). The motor housing (62) is installed at one end of the reinforced outer shell (1). The third motor (61) is installed inside the motor housing (62). The transmission rod (63) is installed on the output shaft of the third motor (61). The transmission rod (63) passes through the reinforced outer shell (1). Several transmission gears (64) with increasing tooth counts are installed on the transmission rod (63). The transmission gears (64) mesh with the gear ring (21) for transmission.

2. The pipeline electric heat tracing device based on thermal work compensation according to claim 1, characterized in that: The cable management device (4) includes a cable management box (41), a first cable reel (42), a second cable reel (43), and a first motor (44). The bottom end of the first cable reel (42) is equipped with a bearing, and the first cable reel (42) is installed in the cable management box (41) through the bearing. The bottom end of the second cable reel (43) is equipped with a connecting rod, and the other end of the connecting rod passes through the first cable reel (42) and is connected to the cable management box (41). The first motor (44) is installed in the cable management box (41), and a gear is installed on the output shaft of the first motor (44). The gear is rotatably connected to the bearing through a belt. The cable management cable (5) passes through the cable management box (41).

3. The pipeline electric heat tracing device based on thermal work compensation according to claim 1, characterized in that: The wire feeding device (3) includes a second motor (31), a conveyor belt (32), a sleeve rod (33), a compression spring (34), a spring connecting rod (35), a wire feeding box (36), a first roller (37), a second roller (38), and a third roller (39). The second motor (31) is installed inside the wire feeding box (36). The first roller (37) is installed on the output shaft of the second motor (31). The second roller (38) is installed inside the wire feeding box (36) through a connecting rod. The sleeve rod (33) is installed on both sides of the third roller (39). One end of the spring connecting rod (35) is connected to the wire feeding box (36). The other end of the spring connecting rod (35) passes through the compression spring (34) and enters the hole of the sleeve rod (33). The conveyor belt (32) is installed on the third roller (39). The first roller (37) is rotatably connected to the second roller (38) through the conveyor belt (32). The skin-feel cable (5) passes through the wire feeding box (36).

4. The pipeline electric heat tracing device based on thermal work compensation according to claim 1, characterized in that: The upper gripping tube (23) is equipped with a protrusion (232), and the lower gripping tube (25) is equipped with a groove (252). One end of the protrusion (232) is equipped with a buckle (231), and one end of the groove (252) is equipped with a slot (251).

5. A pipeline electric heat tracing device based on thermal work compensation according to claim 1, characterized in that: The reinforced outer shell (1) has balls embedded in the corresponding positions of the groove on the side wall and the groove ring (22), and the balls and the groove ring (22) constitute a ball bearing structure.

6. A pipeline electric heat tracing device based on thermal work compensation according to claim 2, characterized in that: The skin-feeling cable (5) is wound clockwise and fixed on the first coil (42), and the skin-feeling cable (5) is wound counterclockwise and fixed on the second coil (43).

7. A pipeline electric heat tracing device based on thermal work compensation according to claim 1, characterized in that: The pipe-laying device (2) is equipped with a temperature sensor. The two ends of the skin-feeling cable (5) are connected to the power junction box (7). The power junction box (7) is connected in series with the power distribution control cabinet (8), the power distribution transformer (9), and the AC power supply (10).

8. A pipeline electric heat tracing device based on thermal work compensation according to claim 1, characterized in that: The heat tracing steel pipe (24) is made of ferromagnetic material, and the upper holding tube (23) and lower holding tube (25) are made of insulating material.

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