Intermediate frequency heating device

Abstract

The utility model relates to an intermediate frequency heating device, and relates to the technical field of pipeline heating. The intermediate frequency heating device comprises a frame body assembly; the rotating disc assembly is installed at the top of the frame body assembly, the rotating disc assembly comprises a disc body, and the disc body is constructed to be capable of rotating relative to the frame body assembly; the heating assembly comprises a transformer fixed to the top of the disc body, the transformer is connected with a heating ring, the transformer is used for introducing medium-frequency current into the heater so that the heating ring can heat a to-be-heated pipe, and the axis of the heating ring is perpendicular to the rotating axis of the disc body. The angle of the heating ring can be adjusted by rotating the disc body, so that the heating quality of the heating ring on the bent part of the pipeline is improved, and the quality of a protective film is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline heating technology, and in particular to a medium-frequency heating device. Background Technology

[0002] To enhance the corrosion resistance of pipelines, anti-corrosion powder needs to be melted and evenly adhered to the pipe wall to form a robust protective film, thereby improving the corrosion resistance and wear resistance of bends. Currently, medium-frequency heating devices are commonly used to heat the pipeline to melt the anti-corrosion powder adhering to the pipe wall, ensuring that the powder inside the pipeline is fully heated and melted, thus improving the quality of the protective film.

[0003] When heating long pipes, the pipe's position needs to be adjusted promptly to regulate the heating area. Furthermore, moving curved pipes can easily lead to uneven heating at the bends, making it difficult to guarantee the quality of the anti-corrosion protective film on the curved sections. Utility Model Content

[0004] This invention provides a medium-frequency heating device to solve the problem of low quality of the protective film when heating curved pipes in related technologies.

[0005] This utility model provides a medium-frequency heating device, comprising: a frame assembly; a turntable assembly, the turntable assembly being mounted on top of the frame assembly, the turntable assembly including a disc body configured to rotate relative to the frame assembly; and a heating assembly, the heating assembly including a transformer fixed on top of the disc body, the transformer being connected to a heating coil, the transformer being used to supply medium-frequency current to the heating coil, thereby heating the tube to be heated, wherein the axis of the heating coil is perpendicular to the rotation axis of the disc body.

[0006] In one embodiment, the turntable assembly includes a worm gear fixedly connected to the bottom of the turntable body, the worm gear being rotatably connected to the frame assembly, and the turntable assembly further includes a worm mounted on the top of the frame assembly, the worm gear meshing with the worm gear to drive the worm gear and the turntable body to rotate about a vertical axis when the worm gear rotates about a horizontal axis.

[0007] In one embodiment, the axis of the heating coil extends horizontally, and the axis of rotation of the disc extends vertically.

[0008] In one embodiment, a sensing plate is fixed on the frame assembly; a proximity switch is installed on the disc, which cooperates with the sensing plate to measure the rotation angle of the turntable; the medium-frequency heating device further includes a controller, and the turntable assembly, the sensing plate, and the proximity switch are electrically connected to the controller to control the rotation angle of the disc.

[0009] In one embodiment, at least three telescopic components are mounted on the bottom of the frame assembly, the telescopic components being configured to extend and retract in the vertical direction.

[0010] In one embodiment, the telescopic assembly includes a sleeve screw fixed to the bottom of the frame assembly. The telescopic assembly also includes a base, which is sleeved on the sleeve screw and threadedly connected to the sleeve screw. Rotating the base can drive the sleeve screw to move in the vertical direction.

[0011] In one embodiment, the frame assembly further includes a first plate, the turntable assembly is mounted above the first plate, and the frame assembly further includes a second plate located below the first plate. A first adjusting screw extending along a first horizontal direction is mounted on the second plate. The first adjusting screw is threadedly connected to a first slider, the first slider is fixed to the first plate, and rotating the first adjusting screw can drive the first slider and the first plate to move along the first horizontal direction.

[0012] In one embodiment, a second slider and a third slider are connected to the bottom of the first plate. The second slider and the third slider are located on opposite sides of the first adjusting screw, and both the second slider and the third slider are supported on the top surface of the second plate.

[0013] In one embodiment, the frame assembly further includes a third plate located at the bottom of the second plate, on which a second adjusting screw extending along a second horizontal direction is mounted. The second adjusting screw is threadedly connected to a fourth slider, which is fixedly connected to the second plate. Rotating the second adjusting screw can drive the fourth slider and the second plate to move along the second horizontal direction, which is set at an angle to the first horizontal direction.

[0014] In one embodiment, the first horizontal direction is perpendicular to the second horizontal direction.

[0015] Compared with the prior art, the advantage of this utility model is that when it is necessary to use a medium frequency heating device to heat the curved part of the pipe, the heating component on the plate can be rotated by rotating the plate body of the turntable assembly, thereby realizing the rotation of the heating coil in the heating component. Since the axis of the heating coil is perpendicular to the rotation axis of the plate body, the angle of the heating coil can be adjusted when the plate body rotates around its rotation axis, so that the heating coil can move along the arc-shaped curved part of the pipe, improving the heating quality of the heating coil on the curved part of the pipe, thereby improving the quality of the protective film. Attached Figure Description

[0016] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the medium-frequency heating device in an embodiment of this utility model.

[0018] Figure label:

[0019] 100. Frame components;

[0020] 110. First plate; 120. First adjusting screw; 130. Second plate; 140. First slider; 150. Second slider; 160. Third slider; 170. Third plate; 180. Fourth slider; 190. Second adjusting screw;

[0021] 200. Turntable assembly; 210. Turntable body; 220. Worm gear; 230. Worm;

[0022] 300. Heating component; 310. Transformer; 320. Heating coil.

[0023] 410. Sensor plate; 420. Proximity switch;

[0024] 500. Telescopic assembly; 510. Sleeve screw; 520. Base;

[0025] 900, pipe bend. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] See Figure 1 As shown, the medium-frequency heating device provided by this utility model includes: a frame assembly 100, a turntable assembly 200, and a heating assembly 300. The turntable assembly 200 is installed above the frame assembly 100, and the heating assembly 300 is installed above the turntable assembly 200.

[0028] The turntable assembly 200 is mounted on top of the frame assembly 100. The turntable assembly 200 includes a disc body 210, which is configured to rotate relative to the frame assembly 100.

[0029] The heating assembly 300 includes a transformer 310, which is fixed to the top of the disk 210. The heating assembly 300 also includes a heating coil 320 connected to the transformer 310. Medium-frequency or high-frequency alternating current is supplied to the heating coil 320 through the transformer 310, thereby generating an alternating magnetic field. This induces a current in the pipe within the frame of the heating coil 320, thus heating the pipe. As the pipe temperature rises, the anti-corrosion powder adhering to the inner wall of the pipe melts, forming a protective film on the inner side of the pipe.

[0030] Since the transformer 310 is fixed to the top of the disc 210, and the disc 210 can rotate relative to the frame assembly 100, when the heating coil 320 needs to heat the curved section of the pipe, the heating coil 320 can be moved along the arc curve by rotating the disc 210 to adapt to the pipe's curvature. Specifically, by controlling the disc 210 to rotate at a uniform speed, the heating coil 320 can rotate uniformly along the curvature of the pipe's bend, melting the anti-corrosion powder in various areas of the pipe. This avoids uneven heating caused by the heating coil 320 contacting the pipe during the heating of the 900-degree bend.

[0031] See Figure 1 As shown, in some implementations, the turntable assembly 200 includes a worm gear 220 fixedly connected to the bottom of the disc body 210, the worm gear 220 being rotatably connected to the frame assembly 100, and the turntable assembly 200 also includes a worm 230 mounted on the top of the frame assembly 100, the worm 230 meshing with the worm gear 220 to drive the worm gear 220 and the disc body 210 to rotate around the vertical axis when the worm 230 rotates around the horizontal axis.

[0032] By rotating the worm gear 230, the worm wheel 220 and the disk 210 are driven to rotate, thereby rotating the heating component 300 fixed on the disk 210. This allows the rotation direction of the driving component (worm gear 230) to be perpendicular to the rotation direction of the driven component (worm wheel 220), which not only changes the direction of rotation and facilitates the placement of drive equipment such as motors, but also enables high-ratio transmission within a confined space, requiring less radial space compared to gear transmissions.

[0033] Understandably, because the transmission ratio of worm gear 220 and worm 230 is relatively large, the worm 230 can only drive the worm gear 220 to rotate at a small angle when it rotates once. This makes it more convenient to control the rotation angle of the disc 210, and it can withstand a larger load. It can easily drive the large-mass heating component 300 to rotate, and the output torque requirement of the drive motor is relatively small.

[0034] It is understood that the drive motor (not shown in the figure) can be fixed on the top of the frame assembly 100, and the drive motor can be connected to the worm gear 230 through a coupling, so that the drive motor can drive the worm gear 230 to rotate relative to the frame assembly 100, thereby driving the worm wheel 220 to rotate.

[0035] See Figure 1As shown, the axis of the heating coil 320 extends horizontally, while the axis of rotation of the disc 210 extends vertically. That is, when the disc 210 of the turntable assembly 200 rotates, it rotates around the vertical axis of rotation, thereby causing the heating coil 320 to also rotate around the axis of rotation of the disc 210. Since the axis of the heating coil 320 extends horizontally, its orientation can be adjusted when it is driven to rotate, thus achieving heating of different areas of the pipe.

[0036] As can be seen from the above, in this application, the rotation of the heating coil 320 is achieved by the worm gear 220 and worm 230. The transmission ratio of the worm gear 220 and worm 230 is relatively large. When the worm gear 220 and worm 230 drive the heating coil 320 to rotate, the rotation speed of the turntable is relatively slow. By adjusting the angle of the tube body inserted into the heating coil 320, the contact between the pipe and the heating coil 320 can be avoided.

[0037] In some implementations, a sensor plate 410 is fixed on the frame assembly 100, and a proximity switch 420 is installed on the disc body 210. The proximity switch 420 cooperates with the sensor plate 410 to measure the rotation angle of the turntable. The medium frequency heating device also includes a controller. The turntable assembly 200, the sensor plate 410 and the proximity switch 420 are electrically connected to the controller to control the rotation angle of the disc body 210.

[0038] In some implementations, the sensor plate 410 can emit a laser, and the proximity switch 420 can receive the laser emitted from the sensor plate 410 only when the turntable rotates to a position where the sensor plate 410 is parallel to the proximity switch 420, thereby determining the current rotation angle of the disk body 210.

[0039] Understandably, by setting multiple circumferentially spaced proximity switches 420 on the disc 210, the current rotation angle of the disc 210 can be analyzed by determining which proximity switch 420 senses the sensing plate 410 during rotation. Compared to setting a single proximity switch 420, this allows for the measurement of the angle of the disc 210 in more situations.

[0040] When the rotation angle of the disc 210 reaches the set requirement, the controller can control the turntable assembly 200 to stop rotating, so as to avoid uneven heating caused by excessive rotation of the heating coil 320.

[0041] In some implementations, at least three telescopic components 500 are mounted on the bottom of the frame assembly 100, the telescopic components 500 being configured to extend and retract in the vertical direction.

[0042] See Figure 1As shown, in some embodiments, four telescopic components 500 spaced apart from each other are installed at the bottom of the frame assembly 100, which can raise the height of the frame assembly 100 by extending the telescopic components and lower the height of the frame assembly 100 by retracting the telescopic components.

[0043] like Figure 1 As shown, the telescopic assembly 500 may include a sleeve screw 510 fixed to the bottom of the frame assembly 100. The telescopic assembly 500 also includes a base 520, which is sleeved on the sleeve screw 510 and threadedly connected to the sleeve screw 510. Rotating the base 520 can drive the sleeve screw 510 to move in the vertical direction.

[0044] Specifically, the outer circumferential surface of the lead screw 510 is provided with an external thread, while the inner wall of the base 520 is provided with an internal thread, and the internal thread of the base 520 is threadedly connected to the external thread of the lead screw 510. Under normal conditions, the self-locking action of the threads prevents relative movement between the base 520 and the lead screw 510. When it is necessary to adjust the height of the telescopic component 500, the base 520 can be rotated, causing the lead screw 510 to move up and down under the drive of the threads, achieving the telescopic effect.

[0045] Compared to using hydraulic cylinders, electric cylinders, or pneumatic cylinders as telescopic components 500, the telescopic component 500 in this application is a base 520 plus a sleeve screw 510. It can achieve self-locking by using the threaded connection between the sleeve screw 510 and the base 520 without external drive, and no additional drive is required during the extension or retraction process, which can be manually adjusted.

[0046] It is understandable that in some other implementations, the sleeve screw 510 can also be set as a cylindrical structure with internal threads, while the base 520 is set as a rod-shaped structure with external threads. When the telescopic component 500 needs to be extended or retracted, the base 520 is rotated to drive the rod-shaped structure in the base 520 to rotate, thereby driving the sleeve screw 510 sleeved outside the rod-shaped structure to rotate, so as to achieve the effect of telescopic component 500 extending or retracting.

[0047] See Figure 1 As shown, in some implementations, the frame assembly 100 further includes a first plate 110, and a turntable assembly 200 is mounted above the first plate 110. The frame assembly 100 also includes a second plate 130 located below the first plate 110. A first adjusting screw 120 extending along a first horizontal direction is mounted on the second plate 130. The first adjusting screw 120 is threadedly connected to a first slider 140. The first slider 140 is fixed to the first plate 110. Rotating the first adjusting screw 120 can drive the first slider 140 and the first plate 110 to move along the first horizontal direction.

[0048] In other words, by rotating the first adjusting screw 120, the first slider 140, which is threadedly connected to the first adjusting screw 120, can be driven to slide along the extension direction of the first adjusting screw 120. The first slider 140 is fixedly connected to the first plate 110. That is to say, during the rotation of the first adjusting screw 120, the first plate 110 can be moved along the direction of the first adjusting screw 120, thereby causing the heating coil 320 on the first plate 110 to move linearly along the first horizontal direction.

[0049] The above description explains that the heating coil 320 can be driven to rotate around the vertical axis of rotation of the disc body 210 via the turntable assembly 200. Furthermore, under the action of the first adjusting screw 120 and the first slider 140, the heating coil 320 can also achieve linear movement in the horizontal direction. In other words, when it is necessary to adjust the heating coil 320, its movement trajectory can be controlled through rotation and linear movement, thereby preventing the heating coil 320 from contacting the pipe body during movement and improving the heating effect of the heating coil 320 on the pipe.

[0050] like Figure 1 As shown, in order to prevent the first slider 140 from rotating around the first adjusting screw 120 during the driving process, the top of the first slider 140 is fixedly connected to the bottom surface of the first plate 110, and the bottom of the first slider 140 is attached to the second plate 130. Thus, the movement of the first slider 140 is restricted by the vertically parallel first plate 110 and second plate 130, and the first slider 140 is prevented from rotating during the sliding process.

[0051] It is understandable that in some implementations, a groove structure may be provided at the bottom of the first plate 110 or above the second plate 130, and the first slider 140 may be partially inserted into the groove structure to prevent the first slider 140 from rotating during movement.

[0052] See Figure 1 As shown, in order to improve the stability of the first plate 110 during linear movement, the bottom of the first plate 110 is connected to a second slider 150 and a third slider 160. The second slider 150 and the third slider 160 are located on opposite sides of the first adjusting screw, and both the second slider 150 and the third slider 160 are supported on the top surface of the second plate 130.

[0053] In other words, the bottom of the second plate 130 is supported by multiple sliders (first slider 140, second slider 150 and third slider 160), thereby preventing the first plate 110 from tilting.

[0054] In order to drive the first adjusting screw 120 to rotate, the first driving screw can be connected to a motor, and the motor can be used to drive the first driving screw to rotate.

[0055] See Figure 1 As shown, in some implementations, the frame assembly 100 also includes a third plate 170 located at the bottom of the second plate 130. A second adjusting screw 190 extending along a second horizontal direction is mounted on the third plate 170. A fourth slider 180 is threadedly connected to the second adjusting screw 190. The fourth slider 180 is fixedly connected to the second plate 130. Rotating the second adjusting screw 190 can drive the fourth slider 180 and the second plate 130 to move along the second horizontal direction. The second horizontal direction is set at an angle to the first horizontal direction.

[0056] In other words, the fourth slider 180 can be driven to move linearly along the second horizontal direction via the second adjusting screw 190, and the second plate 130 is fixedly connected to the fourth slider 180, which can move the second plate 130 and the first plate 110 above the second plate 130. Since the first horizontal direction and the second horizontal direction are set at an angle, by cooperating with the first adjusting screw 120 and the second adjusting screw 190, the heating coil 320 can be driven to move in two directions on the horizontal plane, thereby expanding the adjustment range of the heating coil 320.

[0057] To prevent the fourth slider 180 from rotating during the driving process, its bottom can be held against the third plate 170. Alternatively, a groove matching the fourth slider 180 can be provided above the third plate 170 / at the bottom of the second plate 130, and the fourth slider 180 can be restricted by inserting it into the groove.

[0058] In some implementations, the first horizontal direction is set perpendicular to the second horizontal direction. This makes the adjustment process more convenient.

[0059] To accommodate bends 900 with different turning radii, the heating coil 320 can be configured as a telescopic structure, or the heating coil 320 can be positioned at the telescopic end of the telescopic structure by installing a telescopic structure on the transformer 310, thus adjusting the distance between the heating coil 320 and the center of the disc 210.

[0060] When the bending radius of the bend 900 is R1, the telescopic structure can be extended or retracted to maintain a distance of R1 between the heating coil 320 and the rotation center of the disc 210. This ensures that when the disc 210 is rotated, the rotation radius of the heating coil 320 is R1, consistent with the bending radius of the pipe. This guarantees that the center of the pipe remains aligned with the heating center of the heating coil 320 during rotation, further improving heating quality and ensuring the formation quality of the protective film. When the bending radius of the bend 900 is R2, the telescopic structure can be extended or retracted to adjust the distance between the heating coil 320 and the disc 210 during rotation from R1 to R2, ensuring that the center of the pipe remains aligned with the heating center of the heating coil 320 during rotation.

[0061] The transformer 310 can convert low-frequency electrical energy into medium-frequency electrical energy in the frequency range of 1kHz to 10kHz, and pass the current into the heating coil 320. The current is then transmitted to the bend 900 through the heating coil 320, and the bend 900 is heated by induction heating.

[0062] See Figure 1 As shown, this application also includes an intermediate frequency control cabinet, which is electrically connected to the transformer 310, thereby adjusting the frequency range of the transformer 310 to control the heating temperature. It is understood that the intermediate frequency control cabinet can be connected to the transformer 310 via a wired connection or a wireless connection. In some implementations, a controller electrically connected to the induction plate 410 and the proximity switch 420 can be integrated into the intermediate frequency control cabinet, enabling the cabinet to control not only the heating power of the heating component 300 but also the rotation angle and speed of the turntable assembly 200.

[0063] In some implementations, the first adjusting screw 120 is electrically connected to a first drive motor, and the second adjusting screw 190 is electrically connected to a second drive motor. Both the first and second drive motors are electrically connected to the controller. That is, the controller can not only control the rotation angle of the disc 210 by controlling the rotation of the worm gear 230, but also control the horizontal position of the heating assembly 300 by controlling the first and second drive motors.

[0064] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A medium-frequency heating device, characterized in that, It includes: Frame components; A turntable assembly is mounted on top of the frame assembly, the turntable assembly including a disc body configured to rotate relative to the frame assembly; as well as A heating assembly includes a transformer fixed to the top of the disk body, the transformer being connected to a heating coil, the transformer being used to supply a medium-frequency current to the heating coil so that the heating coil heats the tube to be heated, wherein the axis of the heating coil is perpendicular to the rotation axis of the disk body.

2. The medium-frequency heating device according to claim 1, characterized in that, The turntable assembly includes a worm gear fixedly connected to the bottom of the turntable body, the worm gear being rotatably connected to the frame assembly. The turntable assembly also includes a worm installed on the top of the frame assembly, the worm engaging with the worm gear to drive the worm gear and the turntable body to rotate around a vertical axis when the worm rotates around a horizontal axis.

3. The medium-frequency heating device according to claim 1 or 2, characterized in that, The axis of the heating coil extends horizontally, and the axis of rotation of the disc extends vertically.

4. The medium-frequency heating device according to claim 1 or 2, characterized in that, A sensor plate is fixed on the frame assembly; A proximity switch is installed on the disk body, and the proximity switch cooperates with the sensing plate to measure the rotation angle of the turntable; The medium-frequency heating device also includes a controller, and the turntable assembly, the induction plate and the proximity switch are electrically connected to the controller to control the rotation angle of the turntable.

5. The medium-frequency heating device according to claim 1 or 2, characterized in that, At least three telescopic components are installed at the bottom of the frame assembly, and the telescopic components are configured to extend and retract in the vertical direction.

6. The medium-frequency heating device according to claim 5, characterized in that, The telescopic assembly includes a sleeve screw fixed to the bottom of the frame assembly. The telescopic assembly also includes a base, which is sleeved on the sleeve screw and threadedly connected to the sleeve screw. Rotating the base can drive the sleeve screw to move in the vertical direction.

7. The medium-frequency heating device according to claim 1, characterized in that, The frame assembly further includes a first plate, the turntable assembly is mounted above the first plate, and the frame assembly further includes a second plate located below the first plate. A first adjusting screw extending along a first horizontal direction is mounted on the second plate. The first adjusting screw is threadedly connected to a first slider. The first slider is fixed to the first plate. Rotating the first adjusting screw can drive the first slider and the first plate to move along the first horizontal direction.

8. The medium-frequency heating device according to claim 7, characterized in that, The bottom of the first plate is connected to a second slider and a third slider. The second slider and the third slider are located on opposite sides of the first adjusting screw, and both the second slider and the third slider are supported on the top surface of the second plate.

9. The medium-frequency heating device according to claim 7, characterized in that, The frame assembly also includes a third plate located at the bottom of the second plate. A second adjusting screw extending along a second horizontal direction is mounted on the third plate. A fourth slider is threadedly connected to the second adjusting screw. The fourth slider is fixedly connected to the second plate. Rotating the second adjusting screw can drive the fourth slider and the second plate to move along the second horizontal direction. The second horizontal direction is set at an angle to the first horizontal direction.

10. The medium-frequency heating device according to claim 9, characterized in that, The first horizontal direction is perpendicular to the second horizontal direction.

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