Oil exploitation anti-explosion pipeline heating device with rotational flow disturbance

Abstract

The application discloses a petroleum exploitation anti-explosion pipeline type heating device with rotational flow disturbance and relates to the technical field of petroleum exploitation. The device comprises an oil conveying pipe and an anti-explosion outer pipe, and the anti-explosion outer pipe is fixed to the outer side of the oil conveying pipe. The device can generate displacement of the oil conveying pipe through the flow impact of crude oil on the flow resistance plate, and the transmission mechanism composed of the slide rod, the spring, the connecting rod and the guide rod can adjust the distance between the PCT heating sheet and the outer wall of the oil conveying pipe in real time according to the crude oil flow rate. When the crude oil flow rate is large and the viscosity is high, the displacement of the flow resistance plate is increased, the PCT heating sheet is driven to be close to the pipe wall, the heat exchange effect is strengthened, the viscosity of the crude oil is reduced quickly, the rotational flow effect of the spiral blade in the pipe is combined, and the wax deposition problem of the pipe wall is completely eliminated. When the crude oil flow rate is small, the spring drives the flow resistance plate to reset, the heating distance is increased, the heat input is reduced, the overheat and coking of the crude oil are effectively avoided, and the actual use requirement is better met.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, specifically to an explosion-proof pipeline heating device for oil extraction with swirling disturbance. Background Technology

[0002] In oil extraction and transportation operations, crude oil is generally characterized by high viscosity, easy wax formation, and poor fluidity. In low-temperature environments, it is highly susceptible to pipeline blockage and reduced transportation efficiency. Therefore, the industry commonly uses explosion-proof pipeline heating devices to heat and reduce the viscosity of transported crude oil at a constant temperature. Currently, most existing explosion-proof pipeline heating devices for oil extraction adopt a fixed heating structure, with heating elements fixedly attached to the outer wall of the pipeline. The air inside the interlayer cavity remains stagnant, resulting in numerous technical drawbacks. 1. The heating distance of existing heating devices is mostly fixed, which cannot adaptively adjust the heating distance according to the real-time operating conditions of crude oil flow rate and medium viscosity. When the crude oil flow rate is high and the viscosity is high, the distance between the heating element and the pipeline is too large, resulting in low heat exchange efficiency, poor crude oil viscosity reduction and swirling heating effect, and easy waxing on the pipe wall. When the crude oil stagnates at low speed, fixed continuous heating can easily cause local overheating of the pipeline, crude oil aging and coking, etc., affecting the normal operation of the device. 2. The sealing interlayer between the inner and outer pipes of traditional explosion-proof pipelines is a closed and static cavity. When the heating element is working, it relies solely on natural air convection for heat dissipation and exchange, which easily leads to local heat accumulation and uneven temperature distribution. Continuous heating in a fixed position will cause excessive circumferential temperature difference in the oil pipeline wall. Local high temperature can easily damage the pipeline's anti-corrosion structure and the insulation layer of the heating element, significantly reducing the service life of the equipment. At the same time, there is still a risk of wax formation in the low-temperature area of ​​the pipe wall. The overall heating uniformity is poor and it is difficult to meet the actual use requirements. Summary of the Invention

[0003] The purpose of this invention is to provide an explosion-proof pipeline heating device for oil extraction with swirling disturbance, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an explosion-proof pipeline heating device for oil extraction with swirling disturbance, comprising an oil pipeline and an explosion-proof outer pipe, wherein the explosion-proof outer pipe is fixed to the outside of the oil pipeline, and a sealed cavity is formed between the explosion-proof outer pipe and the oil pipeline, an explosion-proof electrical box is fixed on the explosion-proof outer pipe, a turbulence-disrupting mechanism is fixed on the oil pipeline to achieve turbulence within the sealed cavity to ensure uniform temperature, and a heating mechanism for adaptively adjusting the heating spacing is also fixed on the oil pipeline, wherein the heating mechanism and the turbulence-disrupting mechanism are interconnected to achieve the function of switching the heating position.

[0005] Preferably, the oil pipeline is symmetrically fixed with connecting flanges at both ends, and temperature sensors are also symmetrically fixed on the oil pipeline with their probes located inside the pipeline. Spiral blades are also symmetrically fixed inside the oil pipeline. The connecting flanges facilitate the installation and fixing of the entire device. The temperature sensors monitor the temperature of the material inside the oil pipeline, and the spiral blades create a swirling flow within the pipeline, ensuring uniform heating of the material.

[0006] Preferably, the surface of the explosion-proof outer tube is also covered with a layer of heat insulation cotton, and the length of the explosion-proof outer tube is less than the length of the oil pipeline. Through the function of the heat insulation cotton, heat preservation can be achieved, thereby effectively ensuring the heating effect of the material.

[0007] Preferably, the turbulence-inducing mechanism includes a bracket fixed inside the oil pipeline, with a reciprocating screw connected to the bracket by a bearing. A fluid-driven rotating fan blade is fixed to the reciprocating screw, which drives a movable block to reciprocate left and right. A movable rod is fixed to the movable block, and the movable rod is slidably connected to a fixed box. The fixed box is fixed to the oil pipeline. The fluid-driven rotation of the fan blade drives the reciprocating screw to rotate, thereby enabling the movable block to reciprocate left and right. Combined with the sliding guide effect between the movable rod and the fixed box, the stability of the movable block's movement is ensured.

[0008] Preferably, the movable rod is also symmetrically fixed with movable rings on the left and right sides. The movable rings slide in contact with the outer wall of the oil pipeline and the inner wall of the explosion-proof outer pipe to drive the air flow in the sealed cavity. The movable rings are evenly distributed with several through holes for gas flow. By sliding the movable rod, the movable rings can be moved left and right in an orderly manner, thereby compressing the air in the sealed cavity. Combined with the function of the through holes, the air in the sealed cavity can be allowed to flow, thereby ensuring uniform temperature in the sealed cavity and further improving the heating effect of the material in the oil pipeline.

[0009] Preferably, the movable ring and one end of the fixed rod are fixed to each other, and the fixed rod is distributed at equal angles around the center of the movable ring. The other end of the fixed rod is slidably connected to the arc-shaped groove. At the same time, the arc-shaped groove is opened at equal angles on the ring. When the movable ring moves, it drives the fixed rod to move synchronously. With the sliding action between the fixed rod and the arc-shaped groove, the ring can be driven to reciprocate, thus providing a basic guarantee for the automatic adjustment of the heating position.

[0010] Preferably, the circular ring and the lever are fixed to each other, a guide groove is formed between two adjacent levers, and the levers are fixed to the rotating ring at equal angles. At the same time, the rotating ring and the limiting ring are slidably connected. The limiting ring is fixed inside the explosion-proof outer tube. When the circular ring reciprocates, it synchronously drives the lever and the rotating ring to reciprocate. With the sliding action between the rotating ring and the limiting ring, the stability of the rotating ring's rotation can be ensured, thereby ensuring the normal operation of the device.

[0011] Preferably, the heating mechanism includes a support rod fixed inside the oil pipeline, and the support rod is fixed to the sealing cylinder. A sliding rod is slidably connected to the sealing cylinder, and a spring is fixed between the sliding rod and the sealing cylinder. A baffle plate is also fixed on the sliding rod, and the baffle plate faces the oil inlet end of the oil pipeline. Through the action of the fluid, the baffle plate can be moved by the force of the rubber. Combined with the sliding guide action between the sliding rod and the sealing cylinder, the stability of the movement of the baffle plate can be ensured. Furthermore, through the elastic action of the spring, a basic force can be provided for the automatic reset of the baffle plate.

[0012] Preferably, the baffle plate is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the guide rod. The guide rod is slidably connected to the oil pipeline. When the baffle plate moves, the rotation of the connecting rod can cause the guide rod to move under force. Combined with the sliding guiding effect between the guide rod and the oil pipeline, the guide rod can be made to make stable linear motion.

[0013] Preferably, the guide rod is fixed with an arc-shaped sliding groove plate located on the outside of the oil pipeline, and the arc-shaped sliding groove plate is slidably connected to the slider. The slider and the PCT heating element are fixed to each other. At the same time, a convex shaft is fixed on the slider near the turntable. The convex shaft is slidably connected to the guide groove formed between the two turntables. By moving the guide rod, the arc-shaped sliding groove plate, the slider, and the PCT heating element can be moved, thereby adjusting the distance between the PCT heating element and the oil pipeline, thus achieving automatic temperature control. In addition, the sliding of the convex shaft with the guide groove formed between the two turntables provides a basic force for the swing of the PCT heating element, thereby achieving automatic adjustment of the heating position of the PCT heating element on the oil pipeline, thus avoiding local high temperature from affecting the normal operation of the device.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This explosion-proof pipeline heating device for oil extraction with swirling disturbance utilizes the displacement of a baffle plate caused by the impact of crude oil flow within the pipeline. Combined with a transmission mechanism consisting of a slide rod, spring, connecting rod, and guide rod, the distance between the PCT heating element and the outer wall of the pipeline can be adjusted in real time according to the crude oil flow rate. When the crude oil flow rate is high and the viscosity is high, the displacement of the baffle plate increases, causing the PCT heating element to move closer to the pipe wall, enhancing heat exchange and quickly reducing crude oil viscosity. Combined with the swirling effect of the spiral blades inside the pipe, it completely eliminates the problem of wax deposition on the pipe wall. When the crude oil flow rate is low, the spring drives the baffle plate to reset, increasing the heating distance and reducing heat input, effectively preventing crude oil stagnation, overheating, and coking, thus better meeting actual usage requirements. 2. This oil extraction explosion-proof pipeline heating device with swirling disturbance addresses the shortcomings of traditional explosion-proof pipelines, such as static air in the interlayer, reliance on natural convection for heat exchange, large temperature gradients, and severe heat accumulation. This application utilizes the kinetic energy of flowing crude oil to drive the fan blades to rotate continuously, which in turn drives the reciprocating screw to rotate synchronously. This rotational motion is converted into axial reciprocating linear motion of the moving block and moving rod, which in turn drives the movable ring with through holes to slide back and forth within the sealed interlayer between the oil pipeline and the explosion-proof outer pipe. During the movement of the movable ring, the alternating action of plate sealing and through-hole conduction pushes the interlayer... The sealed air layer forms reciprocating forced convection and turbulent disturbance, which completely breaks the heat exchange limitations of still air and quickly disperses the high-temperature heat accumulated around the PCT heating element. It eliminates the problems of local overheating of the PCT heating element and low-temperature dead corners at the edges of the interlayer, and achieves uniform temperature distribution throughout the interlayer cavity. It effectively solves the problem of excessive circumferential and axial temperature differences in the pipe wall of traditional structures, so that the crude oil is heated evenly throughout the oil pipeline. It avoids the dual hidden dangers of insufficient local heating and waxing, and local overheating damage to the pipeline and electrical insulation structure, and greatly improves the stability of crude oil heating and the service life of equipment. 3. This explosion-proof pipeline heating device for oil extraction with swirling disturbance, while the moving ring reciprocates, drives the dial plate to swing back and forth through the linkage of the fixed rod, arc groove, ring and dial plate. Utilizing the sliding cooperation between the dial plate guide groove and the convex shaft, the PCT heating element is driven to adjust its position circumferentially along the arc groove plate. Through dynamic switching of the heating area, it completely changes the traditional fixed-point continuous heating mode of PCT heating elements, avoiding long-term high-temperature baking of a single location on the oil pipeline wall. This effectively prevents local thermal stress concentration on the pipe wall, aging and peeling of the anti-corrosion layer, and thermal fatigue damage to the pipe material. At the same time, it makes the circumferential heat exchange of the pipe wall more uniform, further optimizing the overall heating effect of crude oil and significantly improving the stability and durability of the equipment during long-term continuous operation. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural diagram of the overall composition of the device of the present invention; Figure 2 This is a frontal cross-sectional three-dimensional structural diagram of the overall composition of the device of the present invention; Figure 3This is a frontal three-dimensional structural diagram of the turbulence-disrupting mechanism of the present invention; Figure 4 This is a top-view three-dimensional structural diagram of the turbulence-disrupting mechanism of the present invention; Figure 5 This is a three-dimensional cross-sectional view of the limiting ring structure of the present invention; Figure 6 This is a frontal three-dimensional structural diagram of the heating mechanism of the present invention; Figure 7 This is a partially enlarged side view of the three-dimensional structure of the heating mechanism of the present invention.

[0016] In the diagram: 1. Oil pipeline; 101. Connecting flange; 102. Temperature sensor; 103. Spiral blade; 2. Explosion-proof outer pipe; 3. Explosion-proof electrical box; 4. Flow turbulence mechanism; 401. Bracket; 402. Reciprocating screw; 403. Fan blade; 404. Moving block; 405. Moving rod; 406. Fixed box; 407. Moving ring; 408. Through hole; 409. Fixed rod; 410. Arc groove; 411. Circular ring; 412. Paddle plate; 413. Rotating ring; 414. Limiting ring; 5. Heating mechanism; 501. Support rod; 502. Sealing cylinder; 503. Slide rod; 504. Spring; 505. Baffle plate; 506. Connecting rod; 507. Guide rod; 508. Arc groove plate; 509. Slider; 510. PCT heating element; 511. Convex shaft. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-7 This invention provides a technical solution: an explosion-proof pipeline heating device for oil extraction with swirling disturbance, comprising an oil pipeline 1 and an explosion-proof outer pipe 2. The explosion-proof outer pipe 2 is fixed to the outside of the oil pipeline 1, and a sealed cavity is formed between the explosion-proof outer pipe 2 and the oil pipeline 1. An explosion-proof electrical box 3 is fixed on the explosion-proof outer pipe 2. A turbulence-disrupting mechanism 4 is fixed on the oil pipeline 1 to achieve turbulence in the sealed cavity to ensure uniform temperature. A heating mechanism 5 with adaptive adjustment of heating spacing is also fixed on the oil pipeline 1. The heating mechanism 5 and the turbulence-disrupting mechanism 4 are interconnected to achieve the switching of heating position.

[0019] The oil pipeline 1 is symmetrically fixed with connecting flanges 101 at both ends, and temperature sensors 102 are also symmetrically fixed on the oil pipeline 1, with the probes of the temperature sensors 102 located inside the oil pipeline 1. Spiral blades 103 are also symmetrically fixed inside the oil pipeline 1. The surface of the explosion-proof outer pipe 2 is covered with a layer of heat-insulating cotton, and the length of the explosion-proof outer pipe 2 is less than the length of the oil pipeline 1. The heating mechanism 5 includes a support rod 501 fixed inside the oil pipeline 1, and the support rod 501 is fixed to the sealing cylinder 502. A sliding rod 503 is slidably connected to the sealing cylinder 502, and a spring 504 is fixed between the sliding rod 503 and the sealing cylinder 502. A flow-blocking device is also fixed on the sliding rod 503. Plate 505, and baffle plate 505 is directly opposite the oil inlet end of oil pipe 1; baffle plate 505 is rotatably connected to one end of connecting rod 506, and the other end of connecting rod 506 is rotatably connected to guide rod 507, and guide rod 507 is slidably connected to oil pipe 1; an arc-shaped slide plate 508 is fixed on guide rod 507 and disposed on the outside of oil pipe 1, and arc-shaped slide plate 508 is slidably connected to slider 509, and slider 509 is fixed to PCT heating plate 510, and a convex shaft 511 is also fixed on slider 509 near the side of dial plate 412, and convex shaft 511 is slidably connected to the guide groove formed between the two dial plates 412; When using this explosion-proof pipeline heating device for oil extraction with swirling disturbance, such as Figures 1-7 As shown, the entire device is first connected to the oil delivery pipe via the connecting flange 101. After the device is installed, the oil flows from left to right through the oil delivery pipe 1. With the help of the spiral blades 103 inside the oil delivery pipe 1, the oil can be made to swirl during the oil flow, thereby better ensuring the heating effect of the oil. When the device is in use, if there is no oil flow in the oil pipeline 1, the distance between the PCT heating element 510 and the outer wall of the oil pipeline 1 is at its maximum. When oil flows in the oil pipeline 1, the impact force of the oil flow will cause the baffle plate 505 to move relative to the sealing cylinder 502. Combined with the sliding guide action between the slide rod 503 and the sealing cylinder 502, the stability of the baffle plate 505's movement can be ensured. At this time, the spring 504 is compressed until the baffle plate 505 is balanced by the oil impact force and the elastic force of the spring 504. When the baffle plate 505 moves relative to the sealing cylinder 502, the transmission action of the connecting rod 506 can guide the guide rod 507. The force causes the sliding of the oil pipe 1, which in turn causes the arc-shaped sliding plate 508, the slider 509, and the PCT heating element 510 to move relative to the outer wall of the oil pipe 1. This allows for the adjustment of the distance between the PCT heating element 510 and the outer wall of the oil pipe 1, thereby achieving automatic temperature control. The greater the oil flow rate, the greater the distance the baffle plate 505 moves, allowing the PCT heating element 510 to get closer to the outer wall of the oil pipe 1 and enhancing the heating effect on the oil inside the oil pipe 1. Conversely, when the oil flow rate decreases, the distance the baffle plate 505 moves decreases, causing the distance between the PCT heating element 510 and the outer wall of the oil pipe 1 to increase, reducing the heating effect on the oil inside the oil pipe 1 and preventing overheating. The turbulence-disrupting mechanism 4 includes a bracket 401 fixed inside the oil pipeline 1, with a reciprocating screw 402 connected to the bracket 401 by a bearing. A fan blade 403, driven by fluid rotation, is fixed to the reciprocating screw 402. The reciprocating screw 402 also drives a movable block 404 to reciprocate left and right. A movable rod 405 is fixed to the movable block 404, and the movable rod 405 is slidably connected to a fixed box 406, which is fixed to the oil pipeline 1. A movable ring 407 is symmetrically fixed to the movable rod 405, and the movable ring 407 slides in contact with the outer wall of the oil pipeline 1 and the inner wall of the explosion-proof outer pipe 2 to drive airflow within the sealed cavity. The movable ring 407 has several through holes 408 evenly distributed for gas flow; the movable ring 407 is fixed to one end of the fixed rod 409, and the fixed rod 409 is distributed at equal angles around the center of the movable ring 407, and the other end of the fixed rod 409 is slidably connected to the arc groove 410, while the arc groove 410 is opened at equal angles on the ring 411; the ring 411 is fixed to the lever 412, and a guide groove is formed between two adjacent levers 412, and the levers 412 are fixed at equal angles on the rotating ring 413, while the rotating ring 413 is slidably connected to the limiting ring 414, and the limiting ring 414 is fixed inside the explosion-proof outer tube 2; During the operation of the device, such as Figures 1-7As shown, when oil flows in the oil pipeline 1, the flow of oil can drive the fan blade 403 to rotate, thereby driving the reciprocating screw 402 to rotate, which in turn drives the movable block 404 to reciprocate left and right along the axis of the reciprocating screw 402. With the sliding guide between the movable rod 405 and the fixed box 406, the stability of the movement of the movable block 404 can be ensured. When the movable rod 405 reciprocates, it can simultaneously drive the movable ring 407 to reciprocate within the sealed cavity between the explosion-proof outer pipe 2 and the oil pipeline 1, thereby compressing the air in the sealed cavity and driving the air to flow through the through hole 408, thereby achieving the turbulence effect of the air in the sealed cavity. By turbulently dispersing the air heated by the PCT heating element 510, the air can be evenly dispersed in the sealed cavity, thereby ensuring the uniform temperature in the sealed cavity, thus ensuring the uniform heating of the oil in the oil pipeline 1 and ensuring the heating effect. When the movable ring 407 reciprocates, it synchronously drives the fixed rod 409 to move. With the sliding action between the fixed rod 409 and the arc groove 410, the ring 411 can be subjected to force and reciprocate, thereby synchronously driving the dial plate 412 and the rotating ring 413 to reciprocate. With the sliding guide action between the rotating ring 413 and the limit ring 414, the stability of the reciprocating rotation of the dial plate 412 and the ring 411 can be ensured. When the dial plate 412 rotates, through the sliding action between the guide groove between the two dial plates 412 and the convex shaft 511, the convex shaft 511 can be subjected to force and move, thereby driving the slider 509 to slide on the arc groove plate 508, and then driving the PCT heating element 510 to move, realizing the position adjustment function of the PCT heating element 510, thereby avoiding the problem of local overheating caused by the PCT heating element 510 continuously heating the fixed position of the oil pipe 1, and further ensuring the heating effect.

[0020] It should be noted that, in this document, 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.

[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A pipeline heating device for oil extraction with swirling disturbance, comprising an oil pipeline (1) and an explosion-proof outer pipe (2), characterized in that: An explosion-proof outer tube (2) is fixed to the outside of the oil pipeline (1), and a sealed cavity is formed between the explosion-proof outer tube (2) and the oil pipeline (1). An explosion-proof electrical box (3) is fixed on the explosion-proof outer tube (2). A turbulence mechanism (4) is fixed on the oil pipeline (1) to achieve turbulence in the sealed cavity to ensure uniform temperature. A heating mechanism (5) with adaptive adjustment of heating spacing is also fixed on the oil pipeline (1). The heating mechanism (5) and the turbulence mechanism (4) are connected to each other to achieve the switching of heating position.

2. The explosion-proof pipeline heating device for oil extraction with swirling disturbance as described in claim 1, characterized in that: The oil pipeline (1) is symmetrically fixed with connecting flanges (101) at both ends, and temperature sensors (102) are also symmetrically fixed on the oil pipeline (1). The probe of the temperature sensor (102) is located inside the oil pipeline (1). Spiral blades (103) are also symmetrically fixed inside the oil pipeline (1).

3. The explosion-proof pipeline heating device for oil extraction with swirling disturbance as described in claim 1, characterized in that: The explosion-proof outer tube (2) is also covered with a layer of heat insulation cotton, and the length of the explosion-proof outer tube (2) is less than the length of the oil pipeline (1).

4. The explosion-proof pipeline heating device for oil extraction with swirling disturbance as described in claim 1, characterized in that: The turbulence mechanism (4) includes a bracket (401) fixed inside the oil pipeline (1), and a reciprocating screw (402) is connected to the bracket (401) by a bearing. A fan blade (403) driven by fluid rotation is fixed on the reciprocating screw (402). The reciprocating screw (402) is used to drive the movable block (404) to reciprocate left and right. A movable rod (405) is fixed on the movable block (404), and the movable rod (405) is slidably connected to the fixed box (406). The fixed box (406) is fixed on the oil pipeline (1).

5. The explosion-proof pipeline heating device for oil extraction with swirling disturbance as described in claim 4, characterized in that: The movable rod (405) is also symmetrically fixed with movable rings (407), and the movable rings (407) slide in contact with the outer wall of the oil pipeline (1) and the inner wall of the explosion-proof outer pipe (2) to drive the air flow in the sealed cavity. Furthermore, a number of through holes (408) for gas flow are evenly distributed on the movable rings (407).

6. The explosion-proof pipeline heating device for oil extraction with swirling disturbance according to claim 5, characterized in that: The movable ring (407) is fixed to one end of the fixed rod (409), and the fixed rod (409) is distributed at equal angles around the center of the movable ring (407). The other end of the fixed rod (409) is slidably connected to the arc groove (410), and the arc groove (410) is opened at equal angles on the ring (411).

7. The explosion-proof pipeline heating device for oil extraction with swirling disturbance as described in claim 6, characterized in that: The ring (411) and the lever (412) are fixed to each other, and a guide groove is formed between two adjacent levers (412). The levers (412) are fixed at equal angles on the rotating ring (413). At the same time, the rotating ring (413) and the limiting ring (414) are slidably connected. The limiting ring (414) is fixed inside the explosion-proof outer tube (2).

8. The explosion-proof pipeline heating device for oil extraction with swirling disturbance according to claim 7, characterized in that: The heating mechanism (5) includes a support rod (501) fixed inside the oil pipe (1), and the support rod (501) is fixed to the sealing cylinder (502). A sliding rod (503) is slidably connected to the sealing cylinder (502), and a spring (504) is fixed between the sliding rod (503) and the sealing cylinder (502). A baffle plate (505) is also fixed on the sliding rod (503), and the baffle plate (505) is facing the oil inlet end of the oil pipe (1).

9. The explosion-proof pipeline heating device for oil extraction with swirling disturbance as described in claim 8, characterized in that: The flow baffle (505) is rotatably connected to one end of the connecting rod (506), and the other end of the connecting rod (506) is rotatably connected to the guide rod (507), and the guide rod (507) is slidably connected to the oil pipeline (1).

10. The explosion-proof pipeline heating device for oil extraction with swirling disturbance according to claim 9, characterized in that: The guide rod (507) is fixed with an arc-shaped slide plate (508) located on the outside of the oil pipe (1), and the arc-shaped slide plate (508) and the slider (509) are slidably connected. The slider (509) and the PCT heating plate (510) are fixed to each other. At the same time, a convex shaft (511) is fixed on the slider (509) near the dial plate (412). The convex shaft (511) and the guide groove formed between the two dial plates (412) are slidably connected.

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