A kind of intermediate frequency induction flexible split coil device and method for pipeline stabilization heat treatment

Abstract

The application provides a kind of intermediate frequency induction flexible open coil device and method for pipeline stabilization heat treatment, the device includes connecting block, adjusting frame and multiple heating coils, multiple heating coils are connected into a loop by connecting block, adjusting frame is multiple and is installed evenly along the circumference of heating coil, wherein, the front end of the first heating coil, the end of the last heating coil is connected with extension cable respectively, the positive and negative poles of extension cable are connected with terminal respectively, and terminal is used to connect power line;Connecting block is detachably connected with one end of multiple heating coils to form an opening.The first and last ends of multiple heating coils are connected by connecting block to form a loop and are pressed tightly, which can withstand the current load required for stabilization heat treatment;Connecting block and one end of heating coil are detachably connected, after opening the insulating cover plate of the open end, simultaneous separation between all heating coils and heat treatment pipeline can be realized, which is convenient to disassemble and meets the requirement of removing heating coil and heat preservation material for air cooling immediately after pipeline heat treatment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of post-welding heat treatment supporting facilities for process pipes, and particularly relates to a flexible intermediate-frequency induction opening coil device and method for pipe stabilization heat treatment. BACKGROUND

[0002] During the heat treatment of thick-wall stainless steel process pipes, the inner wall of the pipe is difficult to reach the heat preservation temperature required by the heat treatment, and with the increase of the wall thickness of the pipe, the temperature gradient in the wall thickness direction of the pipe is greater, so it is difficult to realize the heat treatment process and cannot ensure the stabilization heat treatment effect. The heat treatment of thick-wall stainless steel process pipes is a common construction problem.

[0003] The stabilization heat treatment temperature of austenitic stainless steel is as high as 900 DEG C, and the use of intermediate-frequency induction heating heat treatment can effectively solve the temperature gradient problem. The intermediate frequency refers to 3KHz~12KHz, but the existing intermediate-frequency heating opening coil has the following technical problems:

[0004] 1) When induction heating is used, a larger current is required. The existing intermediate-frequency induction heating wire joint cannot withstand the current load required by the stabilization heat treatment due to poor adhesion and poor conductivity, is prone to heating and causes joint burning and heat treatment failure;

[0005] 2) The current opening type intermediate-frequency induction heating coil is a non-circular loop opening coil, and the non-circular loop type coil has low heating efficiency and cannot be used in the stabilization heat treatment condition. It is generally used for preheating of the pipeline before welding, and the preheating temperature meets 100 DEG C-150 DEG C, which cannot meet the requirements of the stabilization heat treatment under the heat preservation requirement of 900 DEG C.

[0006] 3) The existing opening type intermediate-frequency induction heating coil is a fixed frame type coil, which uses bakelite and resin materials as the skeleton and does not need to withstand high temperature. It is flammable and easy to age under high temperature conditions, and cannot meet the requirements of the stabilization heat treatment. Moreover, the conventional intermediate-frequency heating opening coil has insufficient adhesion with the pipe after being heated, resulting in low heating efficiency and being unable to meet the heat treatment requirement of up to 900 DEG C.

[0007] 4) The conventional intermediate-frequency heating opening coil takes a long time to disassemble, cannot meet the requirement of disassembling the heating coil and the heat preservation material for air cooling immediately after the heat treatment of the pipe, and has a high safety risk due to the high operation heat radiation and scalding hazard when disassembling the coil. SUMMARY

[0008] The purpose of the present application is to provide a flexible intermediate-frequency induction opening coil device for pipe stabilization heat treatment, which overcomes the above technical problems in the prior art.

[0009] Another purpose of the present application is to provide a pipeline stabilization heat treatment method, which can quickly remove the heating coil, realize immediate air cooling, avoid operation heat radiation and scalding hazards, and improve safety.

[0010] To this end, the technical scheme provided by the present application is as follows:

[0011] The present application provides a kind of pipeline stabilization heat treatment with intermediate frequency induction flexible open coil device, including connecting block, adjusting frame and multiple heating coils, the length of each heating coil is equal to the circumference of pipeline, the multiple heating coils are connected into a loop by connecting block, the adjusting frame is multiple and is installed along the circumference of heating coil evenly, wherein, the front end of first heating coil, the end of last heating coil is connected with extension cable respectively, the positive and negative poles of the extension cable are connected with terminal respectively, and the terminal is used to connect power cord;Connecting block and one end of multiple heating coils are detachably connected to form an opening.

[0012] The opposite sides of the connecting block are respectively open end and fixed end, and multiple sets of connecting terminals are arranged on the open end and the fixed end respectively, each set of connecting terminals includes a movable terminal and a fixed terminal, and the two ends of each heating coil are connected with the movable terminal and the fixed terminal respectively.

[0013] The two ends of each heating coil are connected with the movable terminal and the fixed terminal respectively, and the movable terminal and the fixed terminal belong to two adjacent groups respectively, and the end portions of the movable terminal and the fixed terminal are chamfered and silver-plated.

[0014] The adjusting frame includes a slide rail, adjusting blocks and end fixed blocks arranged at both ends of the slide rail, the slide rail is open downward, the adjusting blocks are multiple and the top portions thereof are movably connected with the sliding grooves of the slide rail, the lower portions of the adjusting blocks are heating coil channels, the adjusting blocks are connected by elastic connection stays, the end fixed blocks at both ends are connected with the adjusting blocks, and the end fixed blocks are connected with the slide rail by adjusting pins.

[0015] The connecting block includes an insulating base, an insulating cover plate, a lower pressing plate and an upper pressing plate, the lower pressing plate is fixedly arranged on the insulating base, the upper pressing plate is fixedly arranged on the insulating cover plate, multiple hollow structures parallel to each other are formed between the upper pressing plate and the lower pressing plate, the hollow structures are arranged horizontally, and the two ends of each hollow structure are respectively provided with a movable terminal and a fixed terminal.

[0016] Two pin holes are formed in the side surface of the adjusting block, through holes are formed at both ends of the elastic connection stay, the elastic connection stay is sleeved on the pins in the pin holes through the through holes, and a wire clamp is arranged in the heating coil channel of the adjusting block.

[0017] The insulation cover plate comprises a fixed-end insulation cover plate and an open-end insulation cover plate, the upper pressing plate comprises a fixed-end upper pressing plate and an open-end upper pressing plate, the fixed-end insulation cover plate is connected with the fixed-end upper pressing plate, the open-end insulation cover plate is detachably connected with the open-end upper pressing plate, the movable end of the lower pressing plate is provided with a clamping groove, and the movable end is provided with a protrusion matched with the clamping groove.

[0018] The insulation base and the insulation cover plate are both multi-groove resins, the insulation base is beryllium oxide, and the lower pressing plate and the upper pressing plate are both copper blocks with semicircular grooves.

[0019] The sliding rail is a dovetail type ultra-low-carbon stainless steel guide rail, the end fixing block is an ultra-low-carbon stainless steel block with dovetail grooves, and the adjusting block is a U-shaped groove bakelite sliding block with dovetail grooves.

[0020] The open-end insulation cover plate and the open-end upper pressing plate are connected through locking studs and nuts, the locking studs are made of ultra-low-carbon stainless steel, and the nuts are made of resin.

[0021] A pipeline stabilization heat treatment method comprises the following steps:

[0022] Step 1) fixing the heat preservation blanket on the pipeline to be heat treated;

[0023] Step 2) configuring a plurality of heating coils with a length equal to the circumference of the pipeline to be treated according to the outer diameter of the pipeline to be treated, connecting the plurality of heating coils into a loop through a connecting block, wherein one end of each heating coil is detachably connected with a terminal of the connecting block, and the other end of each heating coil is fixedly connected with the terminal of the connecting block except that the other end of the first heating coil and the last heating coil is respectively connected with the positive and negative poles of the power supply;

[0024] Step 3) connecting the power supply lines of the heating coils and the power supply lines of the semiconductor refrigeration blocks on the connecting block, and performing pipeline stabilization heat treatment;

[0025] Step 4) after the heat treatment is completed, disconnecting one end of each heating coil from the terminal of the connecting block, quickly separating the heating coils from the pipeline, and performing air cooling.

[0026] The beneficial effects of the present application are:

[0027] The pipeline stabilization heat treatment intermediate frequency induction flexible open coil device provided by the present application can form a loop by connecting the plurality of heating coils through the connecting block, and the loop can be compressed tightly and can bear the current load required by the stabilization heat treatment; one end of the connecting block and the heating coil is detachably connected, after the open-end insulation cover plate is opened, the simultaneous separation between all the heating coils and the heat treatment pipeline can be realized, compared with the existing non-loop and the mode of disconnecting the connection between the two ends of each heating coil every time, the device is convenient to disassemble and assemble, and can meet the requirement of immediately disconnecting the heating coil and the heat preservation material for air cooling after the pipeline heat treatment.

[0028] The terminal of the medium frequency induction flexible open coil device is compressed by the insulating base and the insulating cover plate, first, the contact area is large and the end is plated with silver, the conductivity is good, and it is not easy to heat; secondly, the insulating base and the insulating cover plate adopt beryllium oxide, and the heat dissipation is good; finally, the connecting block is embedded with a refrigeration sheet, which can reduce the temperature, so the carrying current is large, thereby solving the problems of joint burning and heat treatment failure.

[0029] The adjusting frame is arranged on the heating coil, the heating coil which is lengthened after being heated is pulled to both sides of the adjusting frame, the heating coil is always in close contact with the pipeline heat preservation material, the heating efficiency is improved, meanwhile, the heating coil is arranged more uniformly, the contact diameter is more consistent, and the heating is more uniform.

[0030] The present application can adapt to the heat treatment of pipelines with different diameters by quickly replacing the heating coil, avoids the problem that at least one set of heating coil is needed for each pipe diameter, greatly saves the equipment cost, is more convenient to store, only needs to replace a single coil when a single heating wire is damaged, greatly reduces the coil maintenance cost, and the coil management cost is low.

[0031] Further detailed description will be given below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structure schematic diagram of an embodiment of the present application;

[0033] Figure 2 is a structure schematic diagram of an embodiment of the connecting block;

[0034] Figure 3 is a structure schematic diagram of an embodiment of the adjusting frame.

[0035] In the figure: 1, extension cable; 2, connecting block; 3, adjusting frame; 4, heating coil; 5, semiconductor refrigeration block power line; 6, heat preservation blanket; 7, fixed end upper pressing plate; 8, locking stud; 9, open end insulating cover plate; 10, movable terminal; 11, open end upper pressing plate; 12, insulating base plate; 13, semiconductor refrigeration block; 14, lower pressing plate; 15, fixed terminal; 16, adjusting bolt; 17, slide rail; 18, adjusting block; 19, elastic connection pull strip; 20, wire clamp; 21, end fixed block. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0037] The exemplary embodiments of the present application will be described with reference to the accompanying drawings, in which like numerals represent like elements; the present application can be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein, provided that the embodiments are thorough and complete, and convey the scope of the present application to those skilled in the art. The terminology used herein with respect to the exemplary embodiments illustrated in the accompanying drawings is not intended to limit the present application. In the drawings, like reference numerals refer to like elements throughout.

[0038] Unless otherwise defined, the terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0039] Embodiment 1

[0040] The present embodiment provides a kind of pipe stabilization heat treatment with intermediate frequency induction flexible open coil device, as shown in Figure 1 It includes connecting block 2, adjusting frame 3 and multiple heating coils 4, the length of each heating coil 4 is equal to the circumference of pipe, the multiple heating coils 4 are connected into a loop by connecting block 2, the adjusting frame 3 is multiple and is installed along the circumferential direction of heating coil 4 evenly, wherein the front end of first heating coil 4, the end of last heating coil 4 are connected with extension cable 1 respectively, the positive and negative poles of extension cable 1 are connected with terminal respectively, and the terminal is used to connect power line;Connecting block 2 and one end of multiple heating coils 4 are detachably connected to form an opening.

[0041] The pipe stabilization heat treatment with intermediate frequency induction flexible open coil device provided by the present application can withstand the current load required by stabilization heat treatment by connecting block 2 to connect multiple heating coils 4 end to end to form a loop and be pressed tightly;Connecting block 2 and one end of heating coil 4 are detachably connected, which can realize the simultaneous separation between all heating coils 4 and heat treatment pipe, compared with the existing non-loop and the mode of removing the connection between the two ends of each heating coil, it is convenient to disassemble and meet the requirement of removing heating coil 4 and heat preservation material for air cooling immediately after pipe heat treatment.

[0042] Embodiment 2

[0043] On the basis of embodiment 1, the present embodiment provides a kind of pipe stabilization heat treatment with intermediate frequency induction flexible open coil device, the opposite sides of connecting block 2 are open end and fixed end respectively, multiple sets of connecting terminals are arranged on the open end and fixed end respectively, each set of connecting terminals includes a movable terminal 10 and a fixed terminal 15, and the two ends of each heating coil 4 are connected with movable terminal 10 and fixed terminal 15 respectively;

[0044] Two ends of each heating coil 4 are connected with movable terminal 10 and fixed terminal 15 respectively, the movable terminal 10 and the fixed terminal 15 belong to two adjacent groups respectively, end portions of the movable terminal 10 and the fixed terminal 15 are cut with bevel and treated with immersion silver; the connecting block 2 is provided with semiconductor refrigeration block 13.

[0045] After the heating treatment, when the heating coil 4 needs to be disassembled, the opening end side is opened, and the simultaneous separation between all the heating coils 4 and the heat treatment pipeline can be realized.

[0046] The end portions of the movable terminal 10 and the fixed terminal 15 are cut with bevel and treated with immersion silver, which is convenient for connection and increases the conductive contact area, and the conductivity is better after immersion silver, and it is not easy to heat; the connecting block 2 is embedded with refrigeration sheet, which can cool down, thereby solving the problems of joint burning and heat treatment failure.

[0047] Example 3

[0048] On the basis of example 1, the embodiment provides a kind of flexible opening coil device for pipe stabilization heat treatment with intermediate frequency induction, as shown in Figure 3 The adjusting frame 3 includes slide rail 17, adjusting block 18 and end fixed block 21 arranged at both ends of the slide rail 17, the slide rail 17 is opened downward, the adjusting block 18 is multiple and the top is movably connected with the sliding groove of the slide rail 17, the lower part of the adjusting block 18 is the passage of the heating coil 4, the adjusting block 18 is connected by elastic connection pull strip 19, both ends of the end fixed block 21 are connected with the adjusting block 18, and the end fixed block 21 is connected with the slide rail 17 by adjusting bolt 16.

[0049] During heat treatment, the heating coil 4 is lengthened after heating, the pre-tensioned elastic connection pull strip 19 is automatically contracted, the coil spacing is adjusted, and the coil is more closely fitted.If the coil fitting is still not tight, then loosen the adjusting bolt 16, pull the end fixed block 21 at both ends along the slide rail 17 to both sides, thereby driving the adjusting block 18 to move to both sides, increasing the distance between the adjusting block 18, adjusting the straight line between the connecting block 2 and the adjusting block 18 into an oblique line, so that the lengthened heating coil 4 is always in close contact with the pipeline, to improve the heating efficiency, and the heating coil 4 is arranged more uniformly and the contact diameter is more consistent, and the heating is more uniform.

[0050] Example 4

[0051] On the basis of example 3, the embodiment provides a kind of flexible opening coil device for pipe stabilization heat treatment with intermediate frequency induction, as shown in Figure 2As shown, the connecting block 2 comprises an insulating base, an insulating cover plate, a lower pressing plate 14 fixed on the insulating base, and an upper pressing plate fixed on the insulating cover plate, a plurality of parallel hollow structures are formed between the upper pressing plate and the lower pressing plate 14, and the two ends of each hollow structure are respectively provided with a movable terminal 10 and a fixed terminal 15.

[0052] The present application does not provide a coil support, connects each heating coil 4 through the connecting block 2 to form a medium-frequency induction flexible open coil device, and presses the terminals of each heating coil 4 through the insulating base plate 12, the lower pressing plate 14, the upper pressing plate and the insulating cover plate, thereby solving the problems of the existing bolt joint, such as not being tightly connected, being unable to withstand the current load required for stable heat treatment, being easy to heat and causing the joint to burn out, heat treatment failure, and oxidation.

[0053] Embodiment 5

[0054] Based on embodiment 4, the present embodiment provides a medium-frequency induction flexible open coil device for pipeline stable heat treatment, two pin holes are formed on the side of the adjusting block 18, through holes are formed at the two ends of the elastic connecting stay 19, the elastic connecting stay 19 is sleeved on the pins in the pin holes, and a wire clamping clamp 20 is arranged in the heating coil 4 channel of the adjusting block 18.

[0055] The two adjacent adjusting blocks 18 are connected into one body through the elastic connecting stay 19; the wire clamping clamp 20 is a bakelite U-shaped clamping plate arranged on the adjusting block 18 at both ends of the coil and the adjusting block 18 in the middle of the sliding rail 17, and is used for connecting the adjusting frame 3 and the heating coil 4.

[0056] Embodiment 6

[0057] Based on embodiment 4, the present embodiment provides a medium-frequency induction flexible open coil device for pipeline stable heat treatment, the insulating cover plate comprises a fixed-end insulating cover plate and an open-end insulating cover plate 9, the upper pressing plate comprises a fixed-end upper pressing plate 7 and an open-end upper pressing plate 11, the fixed-end insulating cover plate is connected with the fixed-end upper pressing plate 7, the open-end insulating cover plate 9 is detachably connected with the open-end upper pressing plate 11, the movable end of the lower pressing plate 14 is provided with a clamping groove, and the movable terminal 10 is provided with a protrusion matched with the clamping groove.

[0058] As shown in Figure 2 when it is necessary to remove the heating coil 4, only the open-end insulating cover plate 9 and the open-end upper pressing plate 11 are separated, the protrusion of the movable terminal 10 is separated from the clamping groove under the action of no pressing force, the same end (open end) of all the heating coils 4 is separated from the connecting block 2, and the entire heating coil 4 device can be quickly removed.

[0059] Embodiment 7

[0060] On the basis of embodiment 5, the embodiment provides a flexible open coil device for pipe stabilization heat treatment, the insulating base and the insulating cover plate are both multi-groove resin, the insulating base is beryllium oxide, and the lower pressing plate 14 and the upper pressing plate are both copper blocks with semicircular grooves.

[0061] The insulating base is a multi-groove resin base, the insulating cover plate is a beryllium oxide block with a plurality of grooves and embedded semiconductor refrigerating sheets, and the insulating base and the insulating cover plate have at least four terminals; the upper pressing plate and the lower pressing plate 14 are semicircular groove copper blocks, which are respectively fixed on the insulating cover plate and the insulating base, and the lower pressing plate 14 is provided with an inclined groove on the side of the open end, so as to facilitate the fixing and pressing of the movable terminal 10.

[0062] Embodiment 8

[0063] On the basis of embodiment 6, the embodiment provides a flexible open coil device for pipe stabilization heat treatment, the sliding rail 17 is a dovetail type ultra-low carbon stainless steel guide rail, the end fixed block 21 is an ultra-low carbon stainless steel block with a dovetail groove, and the adjusting block 18 is a U-shaped groove bakelite sliding block with a dovetail groove.

[0064] The adjusting frame 3 is 3 or 5, and DN600 or less pipes are provided with 3, and DN600 or more pipes are provided with 5, which are placed at 360° with the connecting block 2. The sliding rail 17 of the adjusting frame 3 is a dovetail type ultra-low carbon stainless steel guide rail, the ends of which are provided with screw holes for adjusting the elastic force; the end fixed block 21 is an ultra-low carbon stainless steel block with a dovetail groove, the side of which is provided with screw holes for connecting the elastic force connecting pull strip 19, and is installed at the end of the sliding rail 17 of the adjusting frame 3; the adjusting block 18 is a U-shaped groove bakelite sliding block with a dovetail groove, the side of which is provided with pin holes for connecting the elastic force connecting pull strip 19, and is installed on the sliding rail 17 of the adjusting frame 3; the elastic force connecting pull strip 19 is a double-hole silica gel pull strip, the end of which is provided with a stainless steel clamping piece, which is used for connecting the adjusting block 18 and the end fixed block 21, adjusting the distance of the heating wire and ensuring the close contact of the coil; the adjusting bolt 16 adjusts the elastic force by adjusting and fixing the position of the end fixed block 21, and the adjusting bolt 16 is a stainless steel screw.

[0065] Embodiment 9

[0066] On the basis of embodiment 6, the embodiment provides a flexible open coil device for pipe stabilization heat treatment, the open end insulating cover plate 9 and the open end upper pressing plate 11 are connected through the locking stud 8 and the nut, the material of the locking stud 8 is ultra-low carbon stainless steel, and the material of the nut is resin.

[0067] The open end insulating cover plate 9 and the open end upper pressing plate 11 are pressed tightly through the locking stud 8 and the nut, which is convenient to disassemble and assemble, light in structure, easy to operate, solves the disassembly and assembly problems of the intermediate frequency induction heating coil 4, greatly reduces the safety risk of disassembly and assembly, improves the construction efficiency, and reduces the construction difficulty and cost.

[0068] Specific operations:

[0069] When using it, configure the appropriate length and number of heating coils 4 according to the outer diameter of the pipe to be heat treated. The length is equal to the circumference of the pipe, and the specific number is determined by the power.

[0070] First, begin assembling the flexible open coil. Step one: install movable terminals 10 and fixed terminals 15 at both ends of each heating coil 4, and install fixed terminals 15 and movable terminals 10 at the positive and negative poles of the heating extension cable 1, respectively. Step two: lay the fixed terminals 15 sequentially on the fixed end of the lower pressure plate 14 of the connecting block 2, and use locking studs 8 to lock the insulating cover of the fixed end onto the insulating base plate 12. Step three: use wire clamps 20 to evenly connect the adjusting frame 3 to the heating wire, completing the assembly of the flexible open coil.

[0071] Then, the installation of the flexible open coil begins. First, the insulation blanket 6 is tied to the pipe to be heat-treated. Second, the connecting block 2 and the flexible open coil assembly are placed at positions 1 to 11 on the pipe. The movable terminal 10 is then pressed into the slot at the open end of the lower pressure plate 14. The movable end insulating cover is fixed to the insulating base plate 12 with the locking stud 8 and nut. Third, the coil power cable and the semiconductor cooling block power cable 5 are connected to complete the installation of the flexible open coil and begin heat treatment.

[0072] Finally, after the heat treatment is completed, when removing the open coil, loosen the adjusting bolt 16, loosen the locking nut of the connecting block 2 in sequence, and remove the movable terminal 10 to complete the removal of the flexible open coil.

[0073] This invention allows for quick replacement of heating coil 4 to adapt to heat treatment of pipes with different diameters, avoiding the problem of needing at least one set of heating coil 4 for each pipe diameter, greatly saving equipment costs. It is also easier to store, as only the single heating coil needs to be replaced when a single heating wire is damaged, greatly reducing coil maintenance costs and coil management costs.

[0074] Example 10:

[0075] This embodiment provides a pipeline stabilization heat treatment method, including the following steps:

[0076] Step 1) Secure the insulation blanket 6 to the pipe to be heat-treated;

[0077] Step 2) Configure multiple heating coils 4 with a length equal to the circumference of the pipe according to the outer diameter of the pipe to be treated. Connect the multiple heating coils 4 into a loop coil through the connecting block 2. One end of each heating coil 4 is detachably connected to the terminal of the connecting block 2. Except for the other ends of the first heating coil 4 and the last heating coil 4 which are connected to the positive and negative poles of the power supply respectively, the other ends of the remaining heating coils 4 are fixedly connected to the terminal of the connecting block 2.

[0078] Step 3) connect the heating coil 4 power line and the semiconductor refrigeration block power line 5 on the connecting block 2 respectively, and carry out pipeline stabilization heat treatment;

[0079] Step 4) after the heat treatment is completed, the end of each heating coil 4 is separated from the terminal of the connecting block 2, the heating coil 4 is quickly separated from the pipeline, and air cooling is carried out.

[0080] The method of the present application connects multiple heating coils 4 into a loop by the connecting block 2, meets the stabilization heat treatment temperature of 900 DEG C of austenitic stainless steel, is easy to disassemble after treatment, and realizes rapid air cooling.

[0081] The above examples are only illustrative of the present application and do not constitute a limitation on the protection scope of the present application, and any design identical or similar to the present application belongs to the protection scope of the present application.

Claims

1. A flexible open coil induction heating device for stabilizing heat treatment of a pipe, characterized by: The adjusting frame includes a slide rail, an adjusting block, and end fixing blocks arranged at both ends of the slide rail, the slide rail is downwardly open, the adjusting block is a plurality of blocks and is movably connected to a sliding groove of the slide rail at the top, the lower part of the adjusting block is a heating coil passage, the adjusting block is connected by a spring connecting pull rod, and both end fixing blocks are connected to the adjusting block, and the end fixing blocks are connected to the slide rail by adjusting pins. The opposite sides of the connecting block are respectively an open end and a fixed end, a plurality of groups of connecting terminals are arranged on the open end and the fixed end, each group of connecting terminals includes one movable terminal and one fixed terminal, and the two ends of each heating coil are connected to the movable terminal and the fixed terminal.

2. The flexible open coil inductor device for pipe stabilization heat treatment of claim 1, wherein: The two ends of each heating coil are connected to the movable terminal and the fixed terminal, the movable terminal and the fixed terminal belong to two adjacent groups respectively, and the end parts of the movable terminal and the fixed terminal are chamfered and silver-plated. The connecting block includes an insulating base, an insulating cover plate, a lower pressing plate, and an upper pressing plate, the lower pressing plate is fixedly arranged on the insulating base, the upper pressing plate is fixedly arranged on the insulating cover plate, a plurality of parallel hollow structures are formed between the upper pressing plate and the lower pressing plate, the hollow structures are horizontally arranged, and the two ends of each hollow structure are respectively provided with a movable terminal and a fixed terminal.

3. The flexible open coil device for medium frequency induction heat treatment of a pipe according to claim 1 or 2, characterized in that: The side surface of the adjusting block is provided with two pin holes, the spring connecting pull rod is provided with through holes at both ends, the spring connecting pull rod is sleeved on the pins in the through holes, and the heating coil passage of the adjusting block is provided with a wire clamp.

4. The flexible open coil inductor device for use in a pipe stabilization heat treatment according to claim 1, characterized in that: The insulating cover plate includes a fixed-end insulating cover plate and an open-end insulating cover plate, the upper pressing plate includes a fixed-end upper pressing plate and an open-end upper pressing plate, the fixed-end insulating cover plate is connected to the fixed-end upper pressing plate, the open-end insulating cover plate is detachably connected to the open-end upper pressing plate, the movable terminal is provided with a protrusion matched with the clamping groove.

5. The flexible open coil inductor device for use in a pipe stabilization heat treatment according to claim 3, characterized in that: The insulating base and the insulating cover plate are both multi-groove resins, the insulating base is beryllium oxide, and the lower pressing plate and the upper pressing plate are both copper blocks provided with semicircular grooves.

6. The flexible open coil inductor device for use in a pipe stabilization heat treatment according to claim 3, characterized in that: The slide rail is a dovetail type ultra-low-carbon stainless steel guide rail, the end fixing block is a dovetail groove ultra-low-carbon stainless steel block, and the adjusting block is a U-shaped groove bakelite slide block provided with a dovetail groove.

7. The flexible open coil inductor device for use in a pipe stabilization heat treatment according to claim 4, characterized in that: The open-end insulating cover plate and the open-end upper pressing plate are connected by a locking stud and a nut, the locking stud is made of ultra-low-carbon stainless steel, and the nut is made of resin.

8. The flexible open coil inductor device for use in a pipe stabilizing heat treatment according to claim 5, characterized in that: The method comprises the following steps:

9. A method of stabilizing heat treatment of a pipe using the intermediate frequency induction flexible open coil device for stabilizing heat treatment of a pipe according to any one of claims 1 to 8, characterized by: Step 1) binding the heat preservation blanket on the pipeline to be heated; ​ Step 2) according to the outer diameter of the pipeline to be processed, a plurality of heating coils with the same length as the circumference of the pipeline are configured, and the plurality of heating coils are connected into a loop coil through a connecting block, wherein one end of each heating coil is detachably connected with a terminal of the connecting block, and the other end of each heating coil is fixedly connected with a terminal of the connecting block, except that the other end of the first heating coil and the other end of the last heating coil are respectively connected with positive and negative poles of a power supply; Step 3) the power supply lines of the heating coils and the power supply lines of the semiconductor refrigeration blocks on the connecting block are connected respectively, and the pipeline is subjected to stabilization heat treatment; During the heat treatment process, the heating coil is lengthened after being heated, the pre-tensioned elastic connecting stay is automatically contracted, the distance between the coils is adjusted, the coils are more closely fitted, if the coils are still not closely fitted, the adjusting bolt is loosened again, the end blocks at both ends are pulled along the slide rails to the two sides, so as to drive the adjusting blocks to move to the two sides, increase the distance between the adjusting blocks, adjust the straight line between the connecting block and the adjusting block into an inclined line, and thus the lengthened heating coil is always in close contact with the pipeline; Step 4) after the heat treatment is completed, one end of each heating coil is detached from the terminal of the connecting block, the heating coil is quickly separated from the pipeline, and air cooling is performed.

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