CN212051532U - Induction heating tool - Google Patents

Abstract

The utility model discloses an induction heating frock, including one or more induction work portion, induction work portion receives switch board control and carries out work, induction work portion includes induction coil and supports induction coil's skeleton, the skeleton is laid on the work piece, induction coil aims at the work position and begins to act on after the circular telegram for the work position receives the induction and generates heat by oneself. The utility model is used for carry out heat treatment to welding workpiece, have outstanding heating effect to the controllability is high, handles the back through this device, and the work piece hardness value distributes evenly, compares with traditional electric heating mode, welds the postheat treatment effect advantage obvious between special-shaped work piece room or the great work piece that thickness differs.

Description

Induction heating tool

Technical Field

The utility model relates to an induction heating frock.

Background

Welding, also known as fusion, welding, is a manufacturing process and technique for joining metals or other thermoplastic materials, such as plastics, in a heated, high temperature or high pressure manner.

The welding residual stress is caused by uneven temperature distribution of a weldment due to welding, expansion and contraction of weld metal due to heat, and the like, and therefore the residual stress is inevitably generated along with welding construction.

At present, the commonly used heat treatment after welding is carried out, the treatment method is that a weldment is placed in a heat treatment furnace to be heated to a certain temperature and to be kept warm for a certain time, and plastic flow is generated at a place with high internal stress by utilizing the reduction of the yield limit of materials at a high temperature, the elastic deformation is gradually reduced, and the plastic deformation is gradually increased to reduce the stress.

The effect of post-weld heat treatment on the tensile strength and creep limit of metals is related to the temperature and holding time of the heat treatment. The impact of post-weld heat treatment on weld metal impact toughness varies with steel type. The heating and cooling of the heat treatment should not be too fast, and the inner and outer walls should be uniform.

With the continuous development of products in large-scale manufacturing branches, the thickness of parts of equipment is increased while the volume and the weight of the equipment are increased, and the thickening of workpieces puts higher requirements on post-welding heat treatment of the equipment. At the present stage, the postweld heat treatment of various equipment parts adopts the traditional electric heating mode. The traditional electric heating mode is characterized in that heat energy emitted by a heater is conducted from outside to inside in a heat conduction mode, so that the temperature difference between the inside and the outside of thick-wall equipment is easily overlarge, the heat treatment quality and the engineering construction of the equipment are influenced, and the equipment is forced to be introduced by the large-scale trend.

The post-welding heat treatment tool at the present stage has weak post-welding heat treatment capability on the special-shaped workpiece and the large-sized workpiece, has poor heating effect, low heating speed and low heating efficiency, and causes uneven heating and low controllability.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to not enough among the prior art, provide an induction heating frock for carry out thermal treatment to the welding work piece, have outstanding heating effect, and the controllability is high, handle the back through this device, and the work piece hardness value distributes evenly, compares with traditional electric heating mode, welds the postweld thermal treatment effect advantage obvious between special-shaped work piece room or the great work piece that the thickness differs.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve: the utility model provides an induction heating frock, includes one or more response work portion, response work portion receives the switch board control to carry out work, response work portion includes induction coil and supports induction coil's skeleton, the skeleton is laid on the work piece, induction coil aims at the work position and begins to act on after the circular telegram for the work position receives the induction and generates heat by oneself.

In the above technical scheme, the skeleton includes a plurality of middle support strips and a plurality of peripheral support strips, middle support strip is used for connecting the installation induction coil, peripheral support strip is used for fixed mounting peripheral support strip.

In the technical scheme, the peripheral support strips are divided into two groups, the peripheral support strips are positioned at the end parts of the middle support strips, each group of peripheral support strips are mutually rotatably connected into a line, and the peripheral support strips have elastic deformation performance and can be wound on the surface of a workpiece.

In the above technical scheme, the peripheral support bars are high temperature resistant epoxy plates.

In the above technical solution, the control cabinet includes a display panel, a control panel and a circuit control device, and the control cabinet controls one or more than one induction working parts to work simultaneously or independently.

In the technical scheme, the induction coil is formed by winding electric wires, and enough wire length is reserved at two ends for connecting the wiring of the control cabinet.

The utility model provides an induction heating frock for carry out thermal treatment to the welding work piece, have outstanding heating effect, and the controllability is high, through this device processing back, the work piece hardness value distributes evenly, compares with traditional electric heating mode, welds the postheat treatment effect advantage obvious between special-shaped workpiece or the great work piece that the thickness differs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will discuss the drawings required to be used in the description of the embodiments or the prior art, it is obvious that the technical solutions described in conjunction with the drawings are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings thereof can be obtained according to the embodiments shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of the heating membrane module of the present invention.

Fig. 2 is a schematic diagram of a second structure of the induction coil of the present invention.

Fig. 3 is a schematic view of the control cabinet of the present invention.

Fig. 4 is a control schematic diagram of the induction heating system of the present invention.

Fig. 5 is a schematic diagram of an induction heating temperature control system.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments described in the present disclosure, all other embodiments obtained by a person skilled in the art without creative efforts are within the scope of the present disclosure.

Embodiment 1 of the utility model provides a technical scheme of induction heating frock.

As shown in fig. 1 to 5, an induction heating tool comprises one or more induction working parts 1, the induction working parts are controlled by a control cabinet to work, each induction working part comprises an induction coil 2 and a framework supporting the induction coil 2, the frameworks are laid on a workpiece, and the induction coil 2 is aligned to a working part and starts to act after being electrified, so that the working part is induced to automatically generate heat.

The skeleton includes support strip 11 and a plurality of peripheral support strip 12 in the middle of a plurality of, middle support strip 11 is used for connecting the installation induction coil 2, peripheral support strip 12 is used for fixed mounting peripheral support strip 12.

The peripheral support strips 12 are divided into two groups, the peripheral support strips 12 are positioned at the end parts of the middle support strips 11, each group of peripheral support strips 12 are mutually rotatably connected into a line, and the peripheral support strips 12 have elastic deformation performance and can be wound on the surface of a workpiece.

The perimeter brace bars 12 are high temperature resistant epoxy plates.

The control cabinet comprises a display panel, a control panel and a circuit control device, and the control cabinet controls one or more induction working parts 1 to work simultaneously or independently.

The induction coil 2 is formed by winding electric wires, and enough wire length is reserved at two ends for connecting the wiring of the control cabinet.

The device is arranged on a workpiece to be processed by utilizing a framework, and then acts on the part of the workpiece by utilizing the electrified induction coil 2. For a large-sized workpiece, a plurality of induction working units 1 can be used in a connected manner.

The induction heating technology is characterized in that eddy current is generated inside a heated material by using an electromagnetic induction method, and the eddy current moves inside a workpiece to generate a resistance heat effect, so that the purpose of heating the surface of the workpiece is achieved.

In order to apply the induction heating technology to the heat treatment of the equipment, the induction heating technology is comprehensively known after multiple feasibility tests in advance, the practical application is sequentially carried out on welding seams of a central cylinder and a tube plate of the equipment such as 17715 and 7022, 17715 and 7023, 17715 and 7024 and 17715 and 7026 on the basis of the multiple tests, hardness values are uniformly distributed in a qualified range through detection, and the advantage of the heat treatment effect after welding between special-shaped workpieces or workpieces with large thickness difference in the induction heating is fully proved to be obvious compared with the traditional electric heating. The specific qualification rate of the welding seam of the central tube and the tube plate after the induction heating technology is introduced is 98.07 percent, which is far higher than that of the old technology, and the preset target is successfully reached.

The induction heating technology has started to gradually replace the traditional electric heating technology and flame heating technology in a plurality of heat treatment scenes, and the advantages of high heating speed, small temperature gradient, low energy consumption and the like promote people to continuously and deeply research and develop the technology. On the basis of the experimental result of induction heating of the welding line of the central tube-tube plate sealing tube in the early period, the company continuously excavates the induction heating technology and develops the first multi-loop controllable induction heating system in China. The whole set of multi-loop controllable induction heating system is developed according to the electromagnetic induction principle, and the system is provided with 4 paths of intermediate frequency heating power supplies which are respectively and independently formed and can work simultaneously or independently in a time-sharing manner. The system mainly comprises a multi-loop induction heating temperature controller, an induction coil module and a connecting cable. The control schematic of the entire system is shown in fig. 5.

The multi-loop induction heating temperature controller mainly comprises an industrial PC, an intermediate frequency power supply, an instrument, a control module and a programming module. The frequency sweep soft start device has a repeated start function, adopts a sweep frequency soft start mode of a self-excited mode of excitation, and realizes ideal soft start by tracking the change of a load through a frequency adjusting system and a current and voltage adjusting closed-loop system in the whole start process. And a composite control system of a microcomputer and a program controller is adopted; the change conditions of current, voltage and frequency are monitored in real time in the running process, the change of the load is identified, and automatic adjustment and control are carried out.

Aiming at the problems that most of equipment of some enterprises is non-standard products, welding is more among special-shaped workpieces, the shapes and the specifications of welding joints needing postweld heat treatment are different, and the conventional treatment method cannot meet the requirements. The induction heating equipment is matched with a corresponding induction coil, so that the problems can be perfectly solved, and the induction heating equipment can be used.

The framework of the device can be bent and movable, a plurality of frameworks can be connected at the beginning to form a large module, modules of various specifications can be freely combined and matched according to the size of an actual workpiece, and the heat treatment requirement of the workpiece with the diameter of 800mm-1800mm is met to the greatest extent.

This solution has numerous advantages.

Firstly, the inside self of the workpiece is utilized to generate heat, the temperature difference between the inner surface and the outer surface is small, the heating is more uniform, and the heat treatment quality is further improved.

And secondly, the energy consumption is reduced, the electric energy consumption of the induction heating technology is only about 30 percent of that of electric heating, and the effects of saving energy, reducing consumption and increasing economic benefits are achieved.

Thirdly, the operation efficiency is improved, the wrapping process is simplified, and the labor intensity is reduced.

Fourthly, the operation is simple and clear, and the learning cost is saved.

The scheme is popularized and used in the postweld heat treatment of the welding seams ZB03 and ZB05 of the central cylinder of the coiled tube heat exchanger, the diameter of the welding seam is 728mm, and the thickness of the welding seam is 14 mm. After calculation, a technician uses an induction coil module with 1800mm specification and an induction coil module with 1000mm specification in a matching and combining way, and 2 temperature measuring points are arranged at the top and the bottom of a welding line.

After the heat treatment is finished, the induction coil is disassembled, the color of the whole surface of the welding line is uniform, no bad color spots exist, the heat treatment result is good, and the expected target is achieved.

The scheme is the domestic first multi-point controllable induction heating technology, the multi-path output can work independently, and the uniformity of the temperature is greatly improved. The construction process of multipoint controllable induction heating is simple and convenient, and after the heat insulation material directly insulates heat of the workpiece, the induction coil module is laid on the outer side of the heat insulation material, so that the labor intensity is greatly reduced. The multi-point controllable induction heating technology is continuously controllable in the common welding seam heat treatment application process, the whole heat treatment process is stable, the temperature control precision is high, the temperature difference is small, the temperature distribution is uniform, and the process requirements are met. The appearance color of the workpiece after induction heating heat treatment is consistent and uniform, a thicker decarburized oxide layer does not appear, and the heat treatment quality is good.

After this scheme of adoption, the enterprise has promoted the operating efficiency, reduces to 1.5 hours by the operation of original average 2.5 hours completion a welding seam, and operating efficiency has promoted 40%, and corresponding cost of labor has reduced 40%. Compared with the original resistance heating, the electric energy consumption is reduced by 30 percent, and the electricity expense can be greatly saved all the year round.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The utility model provides an induction heating frock which characterized in that: including one or more response work portion (1), response work portion receives the switch board control to carry out work, response work portion includes induction coil (2) and supports the skeleton of induction coil (2), the skeleton is laid on the work piece, induction coil (2) aim at the work position and begin to act on after the circular telegram for the work position receives the induction and generates heat by oneself.

2. The induction heating tool of claim 1, wherein: the framework comprises a plurality of middle support strips (11) and a plurality of peripheral support strips (12), wherein the middle support strips (11) are used for connecting and installing the induction coil (2), and the peripheral support strips (12) are used for fixedly installing the peripheral support strips (12).

3. The induction heating tool of claim 2, wherein: the peripheral support strips (12) are divided into two groups, the peripheral support strips (12) are positioned at the end parts of the middle support strips (11), each group of peripheral support strips (12) are mutually rotatably connected into a line, and the peripheral support strips (12) have elastic deformation performance and can be wound on the surface of a workpiece.

4. The induction heating tool of claim 3, wherein: the peripheral support strip (12) is a high-temperature-resistant epoxy plate.

5. The induction heating tool of claim 1, wherein: the control cabinet comprises a display panel, a control panel and a circuit control device, and the control cabinet controls one or more induction working parts (1) to work simultaneously or independently.

6. The induction heating tool of claim 1, wherein: the induction coil (2) is formed by winding electric wires, and enough wire length is reserved at two ends for connecting the wiring of the control cabinet.

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