Electromagnetic induction heating wax melting furnace

Abstract

The application discloses an electromagnetic induction heating wax melting furnace, which comprises a melting furnace body, an insulating layer is arranged on the outer wall of the melting furnace body, and an electromagnetic induction coil connected with a high-frequency power supply is arranged outside the insulating layer; the electromagnetic induction coil comprises a bottom coil, a middle coil and an upper coil, the bottom coil is arranged in a vortex shape and is arranged outside a bottom disc of the melting furnace body, the middle coil and the upper coil are both arranged in a spiral shape on the outer wall of the cylindrical melting furnace body, and the upper coil is located above the middle coil. The wax melting furnace utilizes electromagnetic induction heating technology, uses the electromagnetic induction coil arranged outside the melting furnace body as a heating source to replace steam heating or gas heating and electric heating wire heating, has high heating efficiency, a large power adjustment range and accurate temperature control, and does not bring condensed water of steam into materials, so that the good effects of high efficiency, strong controllability and no pollution are achieved.

Description

Technical Field

[0001] This invention relates to the field of wax melting furnace technology, specifically to an electromagnetic induction heating wax melting furnace. Background Technology

[0002] Ship launching refers to the process of moving a ship from the assembly area to the water after most of its construction work has been completed on the slipway or in the dry dock; it is the process of transforming a ship that was originally in a bottom-supported state on the slipway or in the dry dock into a floating state in the water. Ships can be launched using different methods, such as gravity launching, floating trial launching, and mechanized launching. Gravity launching is suitable for most ships, floating launching is suitable for very large ships, and mechanized launching is mainly suitable for small and medium-sized ships. The most commonly used method is slipway gravity launching. Longitudinal greased slipway launching is a launching facility that integrates the slipway and the launching platform; it has a long history and is durable. During launching, a certain thickness of grease is first poured onto the slipway to reduce friction. This grease was previously mostly made of tallow, but now it is often made from paraffin wax, stearic acid, and rosin in different proportions. Then, the keel block, side block and support are all removed, allowing the ship to move onto the slipway and slide plate by its own weight. The anti-slip device is then released, and the ship, along with the support frame, slide plate and other components, slides into the water along the slipway. At the same time, it floats on the water surface by its own buoyancy, thus completing the launching of the ship.

[0003] Before a ship is launched by gravity, the wax applied to the slipway needs to be melted. Traditionally, wax is added to a cylindrical melting furnace with a flame heating chamber at the bottom and a circular natural gas ignition plate at the bottom. This flame heating method, being an open operation, results in uncontrollable temperature. Furthermore, the open flame heating means that if the wax exceeds its ignition point, it can spontaneously combust upon contact with air, posing a significant safety hazard. An improvement is the use of steam heating, as described in application CN201420241070.1, which utilizes steam heat to melt the wax inside the furnace by introducing steam into the bottom. Steam is used as the heating source, directly or indirectly through coils, jackets, etc. While the above method can achieve the basic heating function required for the wax furnace, it has the following drawbacks: the system has high inertia, slow response, low efficiency, and limited steam line laying, resulting in poor equipment mobility; the maximum heating temperature is usually below 120°C and the temperature is not easy to control; and steam condensate is easily mixed into the wax furnace, causing contamination of the materials.

[0004] For example, application number CN202021381779.3 discloses a wax melting furnace, which uses an electric heating plate at the bottom of the furnace to melt the wax. This method of using electric heating improves the mobility of the wax melting furnace, making it easier to move and use. However, all of the above-mentioned wax melting furnaces use...

[0005] The bottom heating method of wax melting furnaces results in the bottom heating up the fastest, while the top heating is uneven. Therefore, it is necessary to provide an electromagnetic induction heating wax melting furnace that is highly efficient, controllable, and does not introduce contaminants to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned technical problems by providing an electromagnetic induction heating wax melting furnace.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic induction heating wax melting furnace, comprising a furnace body, an insulating layer on the outer wall of the furnace body, and an electromagnetic induction coil connected to a high-frequency power supply on the outer side of the insulating layer;

[0008] The electromagnetic induction coil includes a bottom coil, a middle coil, and an upper coil. The bottom coil is coiled in a spiral shape and is attached to the outside of the base of the furnace body. The middle coil and the upper coil are both coiled in a spiral shape on the outer wall of the cylindrical furnace body. The upper coil is located above the middle coil.

[0009] Furthermore, it also includes a control unit, which controls the heating of the furnace body by the bottom coil, middle coil, and upper coil respectively.

[0010] Furthermore, the furnace body is made of ferromagnetic material.

[0011] Furthermore, the bottom side wall of the furnace body is connected to a discharge pipe, and at least one discharge pipe is provided.

[0012] Furthermore, the furnace body is provided with a furnace cover at the top, the outer diameter of the furnace cover is larger than the diameter of the top of the furnace body, a feed inlet is provided through the furnace cover, and the top of the furnace cover is also provided with lifting lugs for hoisting the furnace cover.

[0013] Furthermore, a central cylinder is connected to the lower side of the furnace cover, the central cylinder extends into the furnace body, and a flow gap is provided between the lower end of the central cylinder and the bottom surface of the furnace body; the electromagnetic induction coil also includes an inner cylinder coil, which is spirally and fixedly mounted on the central cylinder.

[0014] Furthermore, a number of sidewall circulation holes are evenly arranged around the sidewall of the central cylinder. The sidewall circulation holes penetrate the sidewall of the hollow cylinder and are elongated holes with their length direction along the circumference of the central cylinder. The circulation holes are arranged in multiple rings on the central cylinder from bottom to top.

[0015] Furthermore, a floating heating plate is provided inside the central cylinder. The outer diameter of the floating heating plate is smaller than the inner diameter of the central cylinder. The floating heating plate floats on the upper layer of the melted wax. A support ring is provided at the lower end of the central cylinder.

[0016] Furthermore, the floating heating plate is made of ferromagnetic material, and the central cylinder is made of a non-magnetizable material.

[0017] Furthermore, the floating heating plate is annular in shape, with a cavity inside the ring, and multiple one-way exhaust valves are provided on the upper surface of the ring, which are connected to the cavity inside the floating heating plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The wax melting furnace of this application utilizes electromagnetic induction heating technology. By setting an electromagnetic induction coil outside the furnace body as a heating source, it replaces steam heating, gas heating, and electric heating wire heating. It has high heating efficiency, a wide power adjustment range, accurate temperature control, and no steam condensate mixed with the material, achieving the good effects of high efficiency, strong controllability, and no introduction of pollutants.

[0020] 2. In this application, the electromagnetic induction coil is divided into a bottom coil, a middle coil, and an upper coil, which can accurately control the heating part of the wax furnace and facilitate the control of the power used. The part that needs to be heated is heated. As the wax flows out and the liquid level drops, the power supply to the upper coil and the middle coil can be disconnected when the upper part does not need to be heated, thereby preventing overheating.

[0021] 3. This application further modifies the furnace cover structure of the furnace body. The furnace cover allows for targeted heating of parts of the furnace body that are difficult to heat evenly at the center, which can effectively improve the performance of the wax melting furnace. Attached Figure Description

[0022] Figure 1 This is one of the isometric views of an electromagnetic induction heating wax melting furnace according to this application;

[0023] Figure 2 A structural diagram showing the furnace body and electromagnetic induction coil of this application;

[0024] Figure 3 This is one of the longitudinal cross-sectional views of the electromagnetic induction heating wax melting furnace in this application;

[0025] Figure 4 This is the second isometric view of an electromagnetic induction heating wax melting furnace according to this application;

[0026] Figure 5 This is the second longitudinal cross-sectional view of the electromagnetic induction heating wax melting furnace of this application;

[0027] In the diagram: 1. Furnace body; 2. Insulation layer; 3. Electromagnetic induction coil; 4. Bottom coil; 5. Middle coil; 6. Upper coil; 7. Discharge pipe; 8. Furnace cover; 9. Feed inlet; 10. Lifting lug; 11. Central cylinder; 12. Flow gap; 13. Inner cylinder coil; 14. Circulation hole; 15. Floating heating plate; 16. Cavity; 17. One-way exhaust valve; 18. Support ring. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Example 1:

[0030] An electromagnetic induction heating wax melting furnace, such as Figure 1 , Figure 2 , Figure 3 As shown, the furnace body 1 is included. In actual use, the furnace body 1 can be a cylindrical body as shown in the figure. The shape of the furnace body 1 is not limited and can also be designed as a kettle-shaped, prismatic, etc., according to actual needs.

[0031] The wax melting furnace of this device has an insulating layer 2 on the outer wall of the furnace body 1. An electromagnetic induction coil 3 connected to a high-frequency power supply is provided on the outside of the insulating layer 2. The insulating layer 2 is provided on one side between the furnace body 1 and the electromagnetic induction coil 3 to insulate the furnace body 1 from the electromagnetic induction coil 3. The insulating layer 2 on the other side can also play a role in heat preservation. In actual use, an induction coil with an insulating jacket can be added to the outer wall of the electromagnetic induction coil 3. Furthermore, the furnace body 1 is made of ferromagnetic material. Based on the principle of electromagnetic induction heating: a magnetic field is generated by components of an electronic circuit board. When an iron-containing container is placed in an alternating magnetic field, the surface of the container cuts the alternating magnetic field lines, generating alternating eddy currents in the metal part inside the container. In this device, when a high-frequency alternating current is applied to the electromagnetic induction coil 3, an alternating magnetic field is formed around the induction coil. The eddy currents cause the iron atoms inside the container (furnace body 1) to move at high speed and randomly. The atoms collide and rub against each other, generating heat energy. Therefore, in this embodiment, the furnace body 1 is made of a magnetizable ferromagnetic material, thereby heating the wax raw material inside. Because the furnace body 1 heats up on its own, without the previous conduction process, the heat conversion rate is particularly high, reaching up to 98% or more.

[0032] like Figure 2 As shown, the electromagnetic induction coil 3 includes a bottom coil 4, a middle coil 5, and an upper coil 6. The bottom coil 4 is spirally wound and is positioned close to the outer side of the furnace body 1. The middle coil 5 and the upper coil 6 are both spirally wound on the cylindrical outer wall of the furnace body 1, with the upper coil 6 located above the middle coil 5. The system also includes a control unit, which controls the heating of the furnace body 1 by the bottom coil 4, middle coil 5, and upper coil 6. Each coil can be individually controlled for heating. The bottom coil 4 heats the bottom of the furnace body. In actual use, since feeding is usually done in large quantities at once, the device includes the middle coil 5 and the upper coil 6 to accelerate the melting process. In actual use, the middle coil 5 and the upper coil 6 can be activated according to the actual amount of material fed. After the control unit energizes the electromagnetic induction coil 3, the furnace body 1 is heated.

[0033] A discharge pipe 7 is connected to the bottom side wall of the furnace body 1. There is at least one discharge pipe 7, but multiple discharge pipes 7 can be set as shown in the figure. Corresponding control valves are set on the discharge pipes 7, allowing operators to conveniently remove the molten wax solution from different positions. Multiple discharge pipes 7 can increase the discharge speed of the operator. It is understood that after discharge, the wax level in the furnace body 1 drops. After the level drops, the electromagnetic induction coil 3 at the corresponding height needs to be turned off. The actual control sequence is: according to the height of the wax block, the electromagnetic induction coil 3 at the corresponding position is turned on from bottom to top. When the level drops, the opposite is true: first turn off the upper coil 6, then the middle coil 5, and finally turn off the bottom coil 4. It is understood that this wax furnace uses electromagnetic heating principle for heating, so this device has high flexibility and can be moved to any position and placed close to the construction site, which greatly facilitates the wax melting operation. Only the power cord needs to be laid.

[0034] Example 2:

[0035] In the first embodiment of this application, a furnace body 1 is used for heating. Although this heating method improves the melting rate of wax to a certain extent and is more flexible than the wax furnace described in the background art, this structure utilizes the shape of the furnace body 1 to achieve gradual heating from the periphery to the center. During the heating process, the wax block in the center of the furnace body 1 needs to be heated by heat transfer from the outer phase center to melt, which still consumes some time. Moreover, the hollow furnace body 1 is not good for the heat convection effect of wax when the wax block melts.

[0036] As an improvement, the furnace body 1 is provided with a furnace cover body 8 on top, such as... Figure 1 , Figure 4 As shown, the outer diameter of the furnace cover 8 is larger than the top diameter of the furnace body 1. The furnace cover 8 is provided with a feed inlet 9. The top of the furnace cover 8 is also provided with a lifting lug 10 for hoisting the furnace cover 8. In actual use, the furnace cover 8 can be hoisted and installed on the furnace body 1 and fixed or removed by a hoisting device.

[0037] Furthermore, a central cylinder 11 is connected to the lower side of the furnace cover 8. The central cylinder 11 extends into the interior of the furnace body 1, and a flow gap 12 is provided between the lower end of the central cylinder 11 and the inner bottom surface of the furnace body 1. The electromagnetic induction coil 3 also includes an inner cylinder coil 13, which is spirally and fixedly arranged around the central cylinder 11. In actual use, the inner cylinder coil 13 arranged inside the furnace body 1 will also generate its own magnetic field. The inner wall of the furnace body 1 is far from the inner cylinder coil 13. Although it can help to achieve the heating effect of the furnace body 1, the inner coil is not the main heat source for the furnace body 1. As shown in the figure, the inner cylinder coil 13 is coiled around the central cylinder 11, so it mainly heats the central cylinder 11. Therefore, the central cylinder 11 in this embodiment is also made of ferromagnetic material. Furthermore, a plurality of side wall circulation holes 14 are evenly arranged around the side wall of the central cylinder 11. The side wall circulation holes 14 penetrate the side wall of the hollow cylinder and are elongated holes with their length direction arranged around the central cylinder 11. The circulation holes 14 are arranged in multiple circles on the central cylinder 11 from bottom to top. In actual use, since a heating source is also provided in the center of the furnace body 1, this embodiment has the function of heating from the inside compared to the first embodiment. It can also be understood that the inner cylinder coil 13 is also controlled by the control unit. As long as a corresponding socket is provided on the furnace cover 8, the inner cylinder coil 13 can be used immediately by simply plugging in the wire.

[0038] In use, the central cylinder 11 guides the hot flow of the wax solution upwards, then flows out through the circulation holes 14 on the side wall into the furnace body 1, and then converges downwards. The wax solution at the bottom re-enters the central cylinder 11 through the flow gap 12, forming a good circulation flow. Figure 5 As shown in the curve, this accelerates the melting efficiency of the wax. Furthermore, the central cylinder 11 and the inner cylinder coil 13 can be removed along with the furnace cover 8, making it convenient to clean the furnace body 1. It is understandable that, since the inner cylinder coil 13 needs to be immersed in the wax solution, a protective layer can be wrapped around the outer wall of the inner cylinder coil 13 during actual use. This facilitates cleaning later and provides insulation protection.

[0039] Example 3:

[0040] This embodiment further optimizes the second embodiment. In this embodiment, the central cylinder 11 is made of a non-magnetizable material, such as... Figure 4 , Figure 5 As shown, in this embodiment, the central cylinder 11 is not used as a direct heating tool, but rather as a frame for the inner cylinder coil 13, a guide for heat convection, and a guide for the raising and lowering of the floating heating plate 15. Specifically, in this embodiment, a floating heating plate 15 is added inside the central cylinder 11. The outer diameter of the floating heating plate 15 is smaller than the inner diameter of the central cylinder 11. The floating heating plate 15 floats on the upper layer of the melted wax. A support ring 18 is provided at the lower end of the central cylinder 11. The support ring 18 is used to confine the floating heating plate 15 inside the central cylinder 11. When there is no wax solution, the floating heating plate 15 will fall onto the support ring 18 due to gravity. When the wax level gradually rises, the density of the floating heating plate 15 is lower than the density of the wax, causing it to float on the wax solution. Therefore, the floating heating plate 15 can move inside the central cylinder 11 with the rise and fall of the wax level.

[0041] Specifically, in this embodiment, the central cylinder 11 does not generate a heating effect; instead, a floating heating plate 15 is used as the heating device. The floating heating plate 15 is made of ferromagnetic material. When the inner cylinder coil 13 is energized, the floating heating plate 15 is magnetized by a high-frequency changing magnetic field inside the inner cylinder coil 13, making the floating heating plate 15 a heating source, and it can move with the liquid level. To make the density of the floating heating plate 15 less than that of the wax liquid, the floating heating plate 15 is designed in a ring shape, and the inside of the ring is a cavity 16. After the floating heating plate 15 is heated and heated, the gas inside the cavity 16 expands, making the inside high pressure. In order to release the pressure, the ring is filled with a gas cylinder. The upper end face of the ring is provided with multiple one-way exhaust valves 17, which are connected to the cavity 16 inside the floating heating plate 15. The exhaust valves can discharge the expanded gas in the cavity 16 and prevent wax from flowing back into the cavity 16. In this embodiment, the floating heating plate 15 is made to float in the upper center of the wax solution by utilizing the buoyancy of the wax solution. Therefore, it can contact the wax block put in from the feed port 9 first, so that the temperature of the top layer of wax liquid will not fluctuate greatly during the feeding process. This makes the temperature of the wax solution in the upper and lower layers and between the inner and outer parts of the wax furnace uniform. In addition, this embodiment can also realize heat convection in the wax solution as in embodiment two.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electromagnetic induction heating wax melting furnace, comprising a furnace body (1), characterized in that, The outer wall of the furnace body (1) is provided with an insulating layer (2), and an electromagnetic induction coil (3) connected to a high-frequency power supply is provided on the outside of the insulating layer (2). The electromagnetic induction coil (3) includes a bottom coil (4), a middle coil (5), and an upper coil (6). The bottom coil (4) is coiled in a spiral shape and is attached to the outside of the base of the furnace body (1). The middle coil (5) and the upper coil (6) are both coiled in a spiral shape on the outer wall of the cylindrical furnace body. The upper coil (6) is located above the middle coil (5). The furnace body (1) is provided with a furnace cover (8) at the top, and a central cylinder (11) is connected to the lower side of the furnace cover (8). The central cylinder (11) extends into the furnace body (1), and a flow gap (12) is provided between the lower end of the central cylinder (1) and the bottom surface of the furnace body (1). The electromagnetic induction coil (3) also includes an inner cylinder coil (13), which is spirally and fixedly arranged on the central cylinder (11). A number of side wall circulation holes (14) are evenly arranged around the side wall of the central cylinder (11). The side wall circulation holes (14) penetrate the side wall of the hollow cylinder and are elongated holes with their length direction along the circumference of the central cylinder (11). The circulation holes (14) are arranged in multiple rings on the central cylinder (11) from bottom to top. The central cylinder (11) is provided with a floating heating plate (15). The outer diameter of the floating heating plate (15) is smaller than the inner diameter of the central cylinder (11). The floating heating plate (15) floats on the upper layer of the melted wax. The lower end of the central cylinder (11) is provided with a support ring (18). The floating heating plate (15) is made of ferromagnetic material, and the central cylinder (11) is made of non-magnetic material.

2. The electromagnetic induction heating wax melting furnace according to claim 1, characterized in that, It also includes a control unit, which controls the bottom coil (4), middle coil (5) and upper coil (6) to heat the furnace body (1).

3. The electromagnetic induction heating wax melting furnace according to claim 1, characterized in that, The furnace body (1) is made of ferromagnetic material.

4. The electromagnetic induction heating wax melting furnace according to claim 1, characterized in that, The bottom side wall of the furnace body (1) is connected to a discharge pipe (7), and the discharge pipe (7) has at least one.

5. An electromagnetic induction heating wax melting furnace according to any one of claims 1-4, characterized in that, The outer diameter of the furnace cover (8) is larger than the top diameter of the furnace body (1). The furnace cover (8) is provided with a feed inlet (9). The top of the furnace cover (8) is also provided with a lifting lug (10) for hoisting the furnace cover (8).

6. The electromagnetic induction heating wax melting furnace according to claim 1, characterized in that, The floating heating plate (15) is in the shape of a ring, with a cavity (16) inside the ring, and multiple one-way exhaust valves (17) are provided on the upper end face of the ring. The one-way exhaust valves (17) are connected to the cavity (16) inside the floating heating plate (15).

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