An energy saving induction heating device

Abstract

The application relates to a power-saving type induction heating device which comprises an induction ring, a first cooling pipe is inserted into the induction ring, both ends of the first cooling pipe extend to the outside of the induction ring, a first cooling joint is connected to each end of the first cooling pipe, a plurality of second cooling joints are arranged on the induction ring in a circumferential direction, a plurality of heat dissipation holes are arranged on the inner side wall of the induction ring in a circumferential direction, and the vertical section shape at the center of the induction ring is a right-angle trapezoid. The power-saving type induction heating device increases the section area by arranging the section of the induction ring into a right-angle trapezoid, thereby improving the strength and preventing the induction ring from being deflected under a high-temperature environment. The pipe is prevented from being cooled in advance when the pipe bending temperature is not reached, the pipe heating time is shortened, the pipe heating efficiency is improved, and the electric energy is saved.

Description

TECHNICAL FIELD

[0001] The application relates to a power-saving type induction heating device and belongs to the technical field of induction coils. BACKGROUND

[0002] With the development of economy and technology, the design requirements of power plants on pipelines are higher and higher, resulting in higher requirements on pipe fittings for pipeline turning. Compared with elbows, bend pipes have the advantages of controllable size, reduced number of welds and convenience for later in-service inspection. When the pipeline is bent, the pipeline is heated through medium-frequency induction of the induction coil.

[0003] The utility model discloses a small -diameter pipeline bend pipe heating induction coil, including quick connector A and induction coil, induction coil is close to the left and right sides of the outer wall of lower extreme and is installed with a quick connector A, the inside of induction coil is provided with a pinhole, the front and back ends of induction coil are provided with a reinforcing device, the reinforcing device includes bolt, fixed base, epoxy resin inner board and isolation layer, and the newly added mica plate is arranged on the outside of the epoxy resin plate when not in use, and will not affect the carrying and use of the whole small -diameter pipeline bend pipe heating induction coil, when using, that is, when needing to heat the pipeline, at this moment, only need to install the mica plate to the inside of the reinforcing device, so that when the small -diameter pipeline bend pipe heating induction coil is used, the temperature is very high, so that the mica plate can effectively isolate the temperature, so that the reinforcing device can be effectively protected, so that the small -diameter pipeline bend pipe heating induction coil can work more safely. However, in the prior art, the following problems still exist:

[0004] 1. With the increasing design requirements, more and more large-diameter and thin-walled pipes are used. However, in order to control the red band during bending, the cross section of the induction coil is mostly back-shaped, and the width is relatively narrow. During bending, the strength is insufficient due to the high temperature, and even the induction coil may be deflected to a certain extent during bending, resulting in bending problems.

[0005] 2. During the bending process of the bend pipe, the bend pipe needs to be cooled (the cooling circuit of the bend pipe is designed synchronously in the induction coil, and air cooling or water cooling is adopted according to requirements), and the induction coil also needs to be cooled (water cooling). In the existing induction coil, the induction coil cooling circuit starts from the upper copper fixed plate of the induction coil, enters the induction coil body, and then enters the upper copper fixed plate from the other side of the coil body. Due to the long circuit, the overall cooling effect of the induction coil is poor. During the initial bending, the cooling circuit of the bend pipe is used to cool the induction coil, resulting in that the induction coil cools the pipe during the initial bending. However, at this time, the pipe has not actually reached the bending temperature, resulting in a longer bending time and a large waste of electricity.

[0006] Therefore, there is a need for an energy-saving induction heating device to prevent the induction ring from deflecting and reduce the electricity consumption for bending. SUMMARY

[0007] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide an energy-saving induction heating device to prevent the induction ring from deflecting and reduce the electricity consumption for bending.

[0008] The technical solution adopted by the present application to solve the above problems is an energy-saving induction heating device, comprising an induction ring, a first cooling pipe inserted into the induction ring, both ends of the first cooling pipe extending outside the induction ring, a first cooling joint connected to both ends of the first cooling pipe, a plurality of second cooling joints circumferentially distributed on the induction ring, and a plurality of heat dissipation holes circumferentially arranged on the inner side wall of the induction ring.

[0009] The vertical cross-sectional shape of the center of the induction ring is a right trapezoid, the induction ring is formed by welding a first induction strip, a second induction strip, a third induction strip, and a fourth induction strip, the upper base and the lower base of the right trapezoidal section of the induction ring are the first induction strip and the second induction strip respectively, the oblique side and the right angle side of the right trapezoidal section of the induction ring are the third induction strip and the fourth induction strip respectively, and the first induction strip is arranged towards the center of the ring hole of the induction ring.

[0010] Preferably, the acute angle of the right trapezoidal section of the induction ring is 55-65 degrees, and the obtuse angle of the right trapezoidal section of the induction ring is 115-125 degrees.

[0011] Preferably, the diameter of the heat dissipation hole is 0.9-1.1 mm.

[0012] Preferably, a first heat conduction plate is welded to the inner side wall of the first induction strip, the first heat conduction plate is attached to the outer wall of the first cooling pipe, a second heat conduction plate is welded to the inner side wall of the second induction strip, the second heat conduction plate is attached to the outer wall of the first cooling pipe, the inner side wall of the fourth induction strip is fixedly welded to the outer wall of the first cooling pipe through a fourth heat conduction plate, two blind holes are arranged on the inner side wall of the fourth heat conduction plate, a first heat conduction rod is arranged through the first heat conduction plate, a second heat conduction rod is arranged through the second heat conduction plate, the first heat conduction rod and the second heat conduction rod are both welded to the inner side wall of a third heat conduction plate, the first heat conduction rod and the second heat conduction rod are matched with the blind holes, and the first heat conduction rod and the second heat conduction rod are respectively inserted into the two blind holes.

[0013] Preferably, the induction ring is open at the top, two heat dissipation plates are fixedly arranged at both ends of the opening of the induction ring, a horizontally distributed fixing plate is welded to the top of each heat dissipation plate, and the two heat dissipation plates are detachably fixedly connected.

[0014] As preferred, heat insulation plates are arranged between the two heat dissipation plates, and the two heat dissipation plates are attached to the heat insulation plates, and the heat insulation plates and the two heat dissipation plates are bolted.

[0015] As preferred, the outer side walls of the two heat dissipation plates are fixedly provided with second cooling pipes, the two ends of the second cooling pipes extend horizontally away from the heat dissipation plates, and the two ends of the second cooling pipes are connected with third cooling joints.

[0016] As preferred, the second cooling pipes are in U-shaped distribution.

[0017] As preferred, the second cooling pipes, the first cooling pipes and the induction coils are all made of red copper.

[0018] An electricity-saving type induction heating method, comprising the following steps:

[0019] S1, inserting the pipeline into the ring hole of the induction coil;

[0020] S2, the induction coil generates a changing magnetic field due to alternating current, and the changing magnetic field forms an eddy current in the straight pipe area to be heated of the pipeline, so as to heat the pipeline, and at the same time, the induction coil is also heated;

[0021] S2.1, when the pipeline is not heated to the bending temperature, the cold source is input from one end of the first cooling pipe and discharged from the other end, the heat on the induction coil is absorbed by the cold source to realize the cooling of the induction coil, and in addition, the cold source is input from one end of one of the third cooling joints and discharged from the other third cooling joint after passing through the second cooling pipe;

[0022] S2.2, when the pipeline is heated to the bending temperature, the induction coil is cooled, and the second cooling joint delivers the cold source into the induction coil and discharges it from the heat dissipation hole and acts on the pipeline to realize the cooling of the pipeline.

[0023] Compared with the prior art, the advantages of the present application are:

[0024] 1. By setting the cross section of the induction coil as a right trapezoid, the cross-sectional area is increased, thereby improving the strength and preventing the induction coil from deflecting in a high temperature environment;

[0025] 2. When the pipeline does not reach the bending temperature, only the first cooling pipe and the second cooling pipe realize heat dissipation of the induction coil, and when the pipeline reaches the bending temperature, the first cooling pipe and the second cooling pipe realize heat dissipation of the induction coil, and at the same time, the third cooling joint delivers the cold source to the induction coil and discharges it from the heat dissipation hole and acts on the pipeline to realize heat dissipation of the bent pipe, so that the bent pipe can be cooled in advance when it does not reach the bending temperature, the heating time of the bent pipe is shortened, the heating efficiency of the bent pipe is improved, and the electric energy is saved;

[0026] In addition, the first heat-conducting plate, the first heat-conducting rod, the second heat-conducting plate, the second heat-conducting rod, and the fourth heat-conducting plate can improve the uniformity of heat absorption by the first cooling pipe into the induction coil. Moreover, the cooperation between the first heat-conducting rod and the first heat-conducting plate and one of the blind holes, as well as the cooperation between the second heat-conducting rod and the second heat-conducting plate and the other blind hole, can not only achieve stable enclosure of the induction coil and enhance its strength, but also improve the enclosure accuracy of the induction coil, ensuring that the angles of the right-angled trapezoidal cross-section of the induction coil are within the set range. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an energy-saving induction heating device according to the present invention;

[0028] Figure 2 for Figure 1 Enlarged view of part B;

[0029] Figure 3 for Figure 1 Enlarged view of part C;

[0030] Figure 4 for Figure 1 A sectional view along the AA direction;

[0031] Figure 5 for Figure 4 Enlarged view of part D.

[0032] The components include: induction coil 1, first induction strip 11, first heat-conducting plate 11.1, first heat-conducting rod 11.2, second induction strip 12, second heat-conducting plate 12.1, second heat-conducting rod 12.2, third induction strip 13, fourth induction strip 14, fourth heat-conducting plate 14.1, blind hole 14.2, first cooling pipe 2, first cooling connector 3, second cooling connector 4, heat dissipation hole 5, heat dissipation plate 6, heat insulation plate 7, second cooling pipe 8, third cooling connector 9, and fixing plate 10. Detailed Implementation

[0033] like Figures 1-5As shown, the power-saving induction heating device in the embodiment includes an induction ring 1 and two parallelly arranged heat dissipation plates 6, the induction ring 1 is annular, the two heat dissipation plates 6 are detachably fixedly connected, the top of each of the two heat dissipation plates 6 is welded with a horizontally distributed fixing plate 10, the device is fixed on the machine bus bar through the fixing plate 10, the top of the induction ring 1 is open, the two ends of the induction ring 1 opening are fixed on the two heat dissipation plates 6 respectively, the first cooling pipe 2 is inserted into the induction ring 1, the two ends of the first cooling pipe 2 extend upwards above the induction ring 1, the two ends of the first cooling pipe 2 are connected with the first cooling joint 3, six second cooling joints 4 are arranged on the induction ring 1 in a circumferential uniform distribution, a plurality of heat dissipation holes 5 are arranged on the inner side wall of the induction ring 1 in a circumferential direction, the first cooling joint 3 and the second cooling joint 4 are connected with a cold source, the cold source can be cooling water or air, the cooling water or air is selected as the cold source according to the pipe material, when the pipe is inserted into the ring hole of the induction ring 1, the induction ring 1 generates a changing magnetic field due to alternating current, the changing magnetic field forms an eddy current in the straight pipe area to be heated, thereby heating the area, at the same time, the induction ring 1 is also heated, at this time, the cold source is input from one end of the first cooling pipe 2 and discharged from the other end, the heat on the induction ring 1 is absorbed by the cold source, thereby realizing the cooling of the induction ring 1, before the heating temperature of the pipe is less than the bending temperature, the second cooling joint 4 is in no cold source input, when the heating temperature of the pipe reaches the bending temperature, the pipe is bent, the second cooling joint 4 inputs the cold source into the induction ring 1 and discharges the cold source from the heat dissipation hole 5 and acts on the pipe, thereby realizing the cooling of the pipe, in this way, the cooling of the induction ring 1 and the cooling of the bent pipe are independent, which can avoid the bent pipe from being cooled in advance before reaching the bending temperature, thereby shortening the heating time of the bent pipe, improving the heating efficiency of the bent pipe and saving the electric energy.

[0034] The vertical section shape at the center of the induction ring 1 is a right-angled trapezoid, the induction ring 1 is formed by welding a first induction strip 11, a second induction strip 12, a third induction strip 13 and a fourth induction strip 14, the upper base and the lower base of the right-angled trapezoidal section of the induction ring 1 are the first induction strip 11 and the second induction strip 12 respectively, the oblique side and the right angle side of the right-angled trapezoidal section of the induction ring 1 are the third induction strip 13 and the fourth induction strip 14 respectively, the first induction strip 11 is arranged towards the center of the ring hole of the induction ring 1, the bent pipe passes through the ring hole of the induction ring 1 from the side of the right angle side of the right-angled trapezoidal section of the induction ring 1, the section of the induction ring 1 is designed as a right-angled trapezoid, compared with the prior art, the section area is increased under the condition that the thickness and the inner width of the induction ring 1 are unchanged, thereby improving the strength and preventing the induction ring 1 from being deflected in a high temperature environment.

[0035] The acute angle of the right-angled trapezoidal section of the induction ring 1 is 60 degrees, and the obtuse angle of the right-angled trapezoidal section of the induction ring 1 is 120 degrees.

[0036] The inner side wall of the first induction strip 11 is welded with a first heat conduction plate 11.1 which is attached to the outer wall of the first cooling pipe 2, the inner side wall of the second induction strip 12 is welded with a second heat conduction plate 12.1 which is attached to the outer wall of the first cooling pipe 2, the inner side wall of the fourth induction strip 14 is welded and fixed with the outer wall of the first cooling pipe 2 through a fourth heat conduction plate 14.1, two blind holes 14.2 are arranged on the inner side wall of the fourth heat conduction plate 14.1, a first heat conduction rod 11.2 is arranged on the first heat conduction plate 11.1, a second heat conduction rod 12.2 is arranged on the second heat conduction plate 12.1, the first heat conduction rod 11.2 and the second heat conduction rod 12.2 are both welded on the inner side wall of a third heat conduction plate, the first heat conduction rod 11.2 and the second heat conduction rod 12.2 are matched with the blind holes 14.2, the first heat conduction rod 11.2 and the second heat conduction rod 12.2 are respectively inserted into the two blind holes 14.2, the heat on the first induction strip 11, the second induction strip 12 and the fourth induction strip 14 can be respectively transmitted to the first cooling pipe 2 through the first heat conduction plate 11.1, the second heat conduction plate 12.1 and the fourth heat conduction plate 14.1, and the heat on the third induction strip 13 can be respectively transmitted to the first cooling pipe 2 from the first heat conduction plate 11.1 and the second heat conduction plate 12.1 through the first heat conduction rod 11.2 and the second heat conduction rod 12.2, so that the uniformity and efficiency of heat dissipation of the induction coil 1 can be improved.

[0037] In addition, during the manufacturing process of the induction coil 1, the first cooling pipe 2 is first welded on the fourth induction strip 14 through the fourth heat conduction plate 14.1, then the first heat conduction rod 11.2 is inserted into one of the blind holes 14.2 after passing through the first heat conduction plate 11.1, the second heat conduction rod 12.2 is inserted into the other blind hole 14.2 after passing through the second heat conduction plate 12.1, and the first induction strip 11, the second induction strip 12, the third induction strip 13 and the fourth induction strip 14 are enclosed, so that the cooperation between the first heat conduction rod 11.2 and the first heat conduction plate 11.1 and one of the blind holes 14.2, and the cooperation between the second heat conduction rod 12.2 and the second heat conduction plate 12.1 and the other blind hole 14.2 can not only realize the stable enclosure of the induction coil 1 and enhance the strength of the induction coil 1, but also improve the enclosure accuracy of the induction coil 1 and ensure that the angles of the straight trapezoidal cross section of the induction coil 1 are within the set range.

[0038] The outer side wall of each of the two heat dissipation plates 6 is fixedly provided with a second cooling pipe 8, which is in U-shaped distribution, the two ends of the second cooling pipe 8 extend horizontally away from the heat dissipation plate 6, and the two ends of the second cooling pipe 8 are connected with third cooling joints 9, one end of one of the third cooling joints 9 is connected with a cold source, the cold source is discharged from the other third cooling joint 9 after passing through the second cooling pipe 8, the heat on the induction coil 1 is transferred to the heat dissipation plate 6, the heat dissipation area is increased through the heat dissipation plate 6, so that the heat dissipation effect is improved, and at the same time, the heat on the heat dissipation plate 6 is transferred to the cold source in the second cooling pipe 8, the heat is discharged through the cold source, and the heat dissipation efficiency is further improved.

[0039] The second cooling pipe 8, the first cooling pipe 2 and the induction coil 1 are all made of red copper.

[0040] The two heat dissipation plates 6 are provided with a heat insulation plate 7, the two heat dissipation plates 6 are attached to the heat insulation plate 7, and the heat insulation plate 7 and the two heat dissipation plates 6 are bolted.

[0041] The heat dissipation holes 5 are provided with one hundred and fifty-eight heat dissipation holes 5, the heat dissipation efficiency is improved through the heat dissipation holes 5, and the diameter of the heat dissipation holes 5 is 1mm.

[0042] A power-saving induction heating method, comprising the following steps:

[0043] S1, the pipeline is inserted into the ring hole of the induction coil 1;

[0044] S2, the induction coil 1 generates a changing magnetic field due to alternating current, the changing magnetic field forms an eddy current in the straight pipe to be heated area of the pipeline, so as to heat the pipeline in the area, at the same time, the induction coil 1 itself is also heated;

[0045] S2.1, when the pipeline is not heated to the bending temperature, the cold source is input from one end of the first cooling pipe 2 and discharged from the other end, the heat on the induction coil 1 is absorbed through the cold source to realize the cooling of the induction coil 1, in addition, the cold source is input from one end of one of the third cooling joints 9 and discharged from the other third cooling joint 9 after passing through the second cooling pipe 8;

[0046] The heat on the induction coil 1 is transferred to the heat dissipation plate 6, the heat dissipation area is increased through the heat dissipation plate 6, so as to improve the heat dissipation effect, at the same time, the heat on the heat dissipation plate 6 is transferred to the cold source in the second cooling pipe 8, the heat is discharged through the cold source, and the heat dissipation efficiency is further improved;

[0047] S2.2, when the pipeline is heated to the bending temperature, the induction coil 1 is cooled, at the same time, the second cooling joint 4 delivers the cold source into the induction coil 1 and discharges it from the heat dissipation hole 5 and acts on the pipeline, so as to cool the pipeline;

[0048] Thus, the cooling of the induction coil 1 is independent of the cooling of the pipe, and the pipe can be cooled in advance when the pipe has not reached the bending temperature, the heating time of the pipe is shortened, the heating efficiency of the pipe is improved, and the electric energy is saved.

[0049] In step S2, cooling water or air is selected as the cooling source according to the pipe material.

[0050] In addition to the above-mentioned embodiments, the present application also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the claims of the present application.

Claims

1. An energy-saving induction heating device, characterized in that: The device includes an induction coil (1), a first cooling pipe (2) is inserted inside the induction coil (1), both ends of the first cooling pipe (2) extend to the outside of the induction coil (1), both ends of the first cooling pipe (2) are connected to a first cooling connector (3), a plurality of circumferentially distributed second cooling connectors (4) are provided on the induction coil (1), and a plurality of heat dissipation holes (5) are provided circumferentially on the inner sidewall of the induction coil (1). The vertical cross-section of the induction coil (1) at its center is a right trapezoid. The induction coil (1) is formed by welding together the first induction strip (11), the second induction strip (12), the third induction strip (13), and the fourth induction strip (14). The upper and lower bases of the right trapezoidal cross-section of the induction coil (1) are the first induction strip (11) and the second induction strip (12), respectively. The hypotenuse and right-angle side of the right trapezoidal cross-section of the induction coil (1) are the third induction strip (13) and the fourth induction strip (14), respectively. The first induction strip (11) is positioned close to the center of the annular hole of the induction coil (1). The inner wall of the first sensing strip (11) is welded with a first heat-conducting plate (11.1), which is attached to the outer wall of the first cooling pipe (2). The inner wall of the second sensing strip (12) is welded with a second heat-conducting plate (12.1), which is attached to the outer wall of the first cooling pipe (2). The inner wall of the fourth sensing strip (14) is fixed to the outer wall of the first cooling pipe (2) by welding with a fourth heat-conducting plate (14.1). The inner wall of the fourth heat-conducting plate (14.1) has two... A blind hole (14.2) is provided. A first heat-conducting rod (11.2) is provided on the first heat-conducting plate (11.1), and a second heat-conducting rod (12.2) is provided on the second heat-conducting plate (12.1). The first heat-conducting rod (11.2) and the second heat-conducting rod (12.2) are both welded to the inner sidewall of the third heat-conducting plate. The first heat-conducting rod (11.2) and the second heat-conducting rod (12.2) are both matched with the blind hole (14.2). The first heat-conducting rod (11.2) and the second heat-conducting rod (12.2) are respectively inserted into the two blind holes (14.2). The acute angle of the right trapezoidal cross section of the induction coil (1) is 55 degrees to 65 degrees, and the obtuse angle of the right trapezoidal cross section of the induction coil (1) is 115 degrees to 125 degrees.

2. The energy-saving induction heating device according to claim 1, characterized in that: The diameter of the heat dissipation hole (5) is 0.9mm to 1.1mm.

3. The energy-saving induction heating device according to claim 1, characterized in that: The top opening of the induction coil (1) has two heat sinks (6) fixedly installed at both ends of the opening of the induction coil (1). The top of the two heat sinks (6) is welded with horizontally distributed fixing plates (10), and the two heat sinks (6) are detachably and fixedly connected.

4. The energy-saving induction heating device according to claim 3, characterized in that: A heat insulation plate (7) is provided between the two heat dissipation plates (6), and both heat dissipation plates (6) are attached to the heat insulation plate (7). The heat insulation plate (7) and the two heat dissipation plates (6) are bolted together.

5. The energy-saving induction heating device according to claim 4, characterized in that: The outer walls of the two heat sinks (6) are fixedly provided with second cooling pipes (8). The two ends of the second cooling pipes (8) extend horizontally away from the heat sinks (6), and the two ends of the second cooling pipes (8) are connected to third cooling connectors (9).

6. The energy-saving induction heating device according to claim 5, characterized in that: The second cooling pipe (8) is distributed in a U-shape.

7. The energy-saving induction heating device according to claim 6, characterized in that: The second cooling pipe (8), the first cooling pipe (2) and the induction coil (1) are all made of copper.

8. The energy-saving induction heating device according to claim 7, characterized in that: An energy-saving induction heating method includes the following steps: S1, Insert the pipe into the annular hole of the induction coil (1); S2. The induction coil (1) generates a changing magnetic field due to alternating current. The changing magnetic field forms eddy currents in the straight pipe area to be heated, thereby heating the pipe in that area. At the same time, the induction coil (1) itself is also heated. S2.1 When the pipe is not heated to the bending temperature, the cold source is input from one end of the first cooling pipe (2) and discharged from the other end. The cold source absorbs the heat on the induction coil (1) to cool the induction coil (1). In addition, the cold source is input from one end of one of the third cooling joints (9), and discharged from the other third cooling joint (9) after passing through the second cooling pipe (8). S2.2 When the pipeline is heated to the bending temperature, the induction coil (1) cools down, and the second cooling joint (4) delivers the cold source into the induction coil (1) and discharges it from the heat dissipation hole (5) and acts on the pipeline to achieve pipeline cooling.

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