Automatic dewaxing furnace

Abstract

The utility model relates to an automatic dewaxing furnace which comprises a furnace body and a heat exchange box arranged on one side of the furnace body, the heat exchange box is provided with a heat exchange pipe, an air outlet and a water outlet, one end of the heat exchange pipe is connected with the air outlet, water used for heat exchange is contained in the heat exchange box, the heat exchange pipe is immersed in the water, and the water outlet is connected with the water outlet. The boiler body comprises an inner container and an outer container, the inner container is communicated with the outer container through a pipeline, the inner container is provided with a first exhaust valve, a heating device is arranged in the outer container, a water inlet valve is arranged on the surface of the outer container, the first exhaust valve is connected with the heat exchange pipe through a pipeline, and the water inlet valve is connected with the water outlet through a pipeline. By arranging the heat exchange box, the heating time of the heating device is shortened, the boosting speed is increased, the cracking phenomenon caused by the slow boosting speed of the shell mold is effectively prevented, the quality of the shell mold is guaranteed, meanwhile, the consumption of electric energy can be effectively reduced, and the operation cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of precision casting, in particular to an automatic dewaxing furnace. Background Art

[0002] Precision casting is also called lost wax manufacturing. Its main principle is: select suitable investment mold materials (such as paraffin) to make investment molds, and then repeatedly apply refractory coating and sprinkle refractory sand on the surface of the investment mold to form a hardened shell on the surface of the investment mold, and then melt the internal investment mold to obtain a finished shell mold of the required shape.

[0003] At present, most precision castings use paraffin as the material for the lost pattern. The lost pattern made of paraffin is usually called a wax pattern. Multiple layers of refractory coating and refractory sand are repeatedly coated on the surface of the wax pattern. After drying to form a shell pattern, the wax inside the shell pattern is melted by high temperature to obtain a finished shell pattern. Nowadays, a dewaxing furnace is generally used as a device for dewaxing the shell pattern. Since the wax expands when it melts, in order to prevent it from cracking the shell pattern, a certain pressure needs to be applied to the shell pattern during dewaxing. The existing dewaxing furnace mainly generates steam pressure by heating water, thereby pressurizing the shell pattern. However, since the process of heating water to form steam is slow, it takes a long time to increase the pressure. During this period, the shell pattern is prone to cracking and cracking due to insufficient pressure, which seriously affects the quality of the shell pattern and even directly causes the shell pattern to be scrapped. In addition, the amount of electricity consumed by heating water is very large, so the operating cost of the existing dewaxing furnace is usually high, and most of the steam is directly discharged after the dewaxing work is completed, resulting in a large waste of heat energy. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an automatic dewaxing furnace which can effectively protect the quality of the shell mold and reduce the operating cost.

[0005] An automatic dewaxing furnace comprises a furnace body and a heat exchange box arranged on one side of the furnace body, the heat exchange box is provided with a heat exchange tube, an air outlet and a water outlet, one end of the heat exchange tube is connected to the air outlet, water for heat exchange is contained in the heat exchange box, the heat exchange tube is immersed in the water, the furnace body comprises an inner tank and an outer tank, the inner tank and the outer tank are connected to each other through a pipeline, the inner tank is provided with a first exhaust valve, a heating device is provided inside the outer tank, and a water inlet valve is provided on the surface, the first exhaust valve is connected to the heat exchange tube through a pipeline, and the water inlet valve is connected to the water outlet through a pipeline.

[0006] In the above technical scheme, the automatic dewaxing furnace is used to dewax the shell mold. During dewaxing, the shell mold with wax is placed in the inner tank of the furnace body. The wax in the shell mold is melted and flows out by high-temperature heating, thereby obtaining a finished shell mold. Since the wax expands when it melts, in order to prevent the shell mold from cracking, a certain pressure needs to be applied to the shell mold during dewaxing. A heating device is provided inside the outer tank. On the one hand, the heating device can heat the inner tank to melt the wax in the shell mold. On the other hand, it can generate steam pressure by heating water at high temperature, and then transmit the pressure to the inner tank through the pipeline between the inner tank and the outer tank, thereby This ensures that the shell mold will not be cracked during dewaxing; the heat exchange box is arranged on one side of the furnace body, and a heat exchange tube is arranged in the heat exchange box. The first exhaust valve on the inner tank is connected to the heat exchange tube inside the heat exchange box through a pipeline. The heat exchange tube is immersed in the water inside the heat exchange box. The high-temperature steam in the inner tank is discharged through the first exhaust valve and reaches the heat exchange tube, and exchanges heat with the water in the heat exchange box. After the heat exchange is completed, the steam is discharged from the air outlet, and the water inside the heat exchange box is heated and then discharged from the water outlet, and is sent to the outer tank through the pipeline and the water inlet valve on the outer tank, so as to be heated by the heating device in the outer tank to generate steam, so as to continue to provide pressure for the inside of the inner tank, forming a cycle.

[0007] Among them, the hot water after heat exchange in the heat exchange box is sent to the heating device. The hot water with a high initial temperature can shorten the heating time of the heating device, speed up the pressure increase speed, and effectively prevent the shell mold from cracking due to the slow pressure increase speed, thereby ensuring the quality of the shell mold. At the same time, it can also reduce the consumption of electricity and save operating costs.

[0008] As an optional technical solution of the present application, the heat exchange tube is a broken line with multiple corners, or a spiral structure.

[0009] In the above technical solution, the heat exchange tube is a zigzag and spiral structure, so that the heat exchange area between the heat exchange tube and water can be increased, so that the water in the heat exchange box can absorb the heat of the steam in the heat exchange tube more quickly.

[0010] As an optional technical solution of the present application, the heat exchange box further includes a water replenishment port and a pressure relief port, and the water replenishment port and the pressure relief port are arranged on the surface of the heat exchange box.

[0011] In the above technical solution, the water replenishment port is used to replenish water in the heat exchanger box, and the pressure relief port is used to relieve pressure. Since the water in the heat exchanger box absorbs heat and evaporates to produce a certain amount of gas, the pressure is relieved through the pressure relief port, which can prevent the pressure in the heat exchanger box from being too high and ensure safety.

[0012] As an optional technical solution of the present application, a solenoid valve is provided on the pipeline between the first exhaust valve and the heat exchange tube.

[0013] In the above technical solution, after the dewaxing work is completed, when the inner liner is exhausted, the solenoid valve can realize segmented exhaust by controlling the switch of the pipeline, thereby preventing the air pressure in the inner liner from dropping instantly, avoiding collapse and deformation of the shell mold, and ensuring the quality of the shell mold.

[0014] As an optional technical solution of the present application, the heating device is connected to the water inlet valve, and the heating device includes a plurality of heating tubes.

[0015] In the above technical solution, the heating device is provided with a plurality of heating tubes, which can speed up the speed of generating steam and increase the speed of increasing pressure. After the water in the heat exchange box is heat exchanged, the hot water enters the heating tube of the heating device through the water inlet valve of the outer tank. By heating the hot water in the heating tube, steam is generated, thereby increasing the pressure inside the outer tank. Then, the pressure can be released into the inner tank through the pipeline connecting the outer tank and the inner tank. In addition, the heating device also heats the inner tank at the same time, thereby increasing the temperature inside the inner tank, melting the wax in the shell mold, and ensuring the normal dewaxing work of the shell mold.

[0016] As an optional technical solution of the present application, a connecting pipeline is provided between the inner liner and the outer liner, a connecting valve is provided on the connecting pipeline, and the inner liner and the outer liner are connected to each other through the connecting pipeline.

[0017] In the above technical solution, the two ends of the connecting pipeline are respectively connected to the inner liner and the outer liner, and the connecting valve is used to control the switch of the connecting pipeline, thereby controlling the outer liner to apply pressure to the inner liner.

[0018] As an optional technical solution of the present application, a separation mechanism is provided on one side of the connection between the outer tank and the connecting pipeline, and the separation mechanism includes a steam-water separation partition, and the steam-water separation partition and the inner wall of the outer tank form an isolation cavity, and the connecting pipeline is connected to the isolation cavity.

[0019] In the above technical solution, the steam-water separation partition and the inner wall of the outer tank enclose an isolation chamber, which covers the connection between the outer tank and the connecting pipeline. The water vapor generated by the heating device enters the connecting pipeline after passing through the steam-water separation partition. The steam-water separation partition can isolate most of the water in the water vapor and prevent excessive water from entering the inner tank and affecting the dewaxing effect.

[0020] As an optional technical solution of the present application, the outer liner includes a second exhaust valve, and the second exhaust valve is arranged on the top of the outer liner.

[0021] In the above technical solution, the second exhaust valve is located at the top of the outer container, and is used to exhaust excess steam in the outer container after the dewaxing work is completed.

[0022] As an optional technical solution of the present application, the inner pot is also provided with a wax drain valve and a water drain valve, and the wax drain valve and the water drain valve are arranged at the bottom of the inner pot.

[0023] In the above technical solution, after dewaxing is completed, the wax drain valve is used to drain the melted wax in the inner tank, and the water drain valve is used to drain the condensed water in the inner tank, thereby ensuring the cleanliness of the inner tank.

[0024] As an optional technical solution of the present application, one side of the inner pot is arranged inside the outer pot, and the other side extends outside the outer pot, and a furnace door is provided at one end of the inner pot away from the outer pot.

[0025] In the above technical solution, one side of the inner pot is arranged in the outer pot. When the heating device in the outer pot heats to generate steam, the inner pot can be heated at the same time to increase the temperature inside the inner pot, thereby melting the wax in the shell mold. The outer pot is exposed on the other side of the inner pot, and a furnace door is provided. By opening and closing the furnace door, the shell mold can be easily put in and taken out.

[0026] The utility model has the following beneficial effects:

[0027] The present application provides a heat exchange box on one side of the furnace body, and the heat exchange box is provided with heat exchange tubes and water for heat exchange. The heat of the high-temperature steam used for pressurization in the inner tank is recovered through the heat exchange box, and the hot water after absorbing the heat is sent to the heating device in the outer tank for heating, thereby generating steam pressure and reducing the waste of heat energy. The hot water with a high initial temperature can greatly shorten the heating time of the heating device, speed up the pressure increase speed, effectively prevent the shell mold from cracking due to the slow pressure increase speed, ensure the quality of the shell mold, and at the same time, can effectively reduce the consumption of electric energy and save operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of an automatic dewaxing furnace according to an embodiment.

[0030] Figure 2 This is a left side view of the furnace body described in this application (excluding the heat exchange box).

[0031] Figure 3 This is a top view of the furnace body described in this application (excluding the heat exchange box).

[0032] Figures and descriptions in the figure:

[0033] 1-furnace body; 11-inner tank; 111-first exhaust valve; 112-wax drain valve; 113-drain valve; 114-furnace door; 115-rotating mechanism; 12-outer tank; 121-water inlet valve; 122-steam-water separation partition; 123-isolation chamber; 124-second exhaust valve; 125-furnace cover; 13-connecting pipeline; 131-connecting valve; 2-heating device; 21-heating pipe; 3-heat exchange box; 31-heat exchange pipe; 32-gas outlet; 33-water outlet; 34-water supply port; 35-pressure relief port; 4-solenoid valve. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] Please refer to Figures 1 to 3 In a preferred embodiment of the present application, an automatic dewaxing furnace is provided for removing the wax mold in the shell mold, which includes a furnace body 1 and a heat exchange box 3 arranged on one side of the furnace body 1. The heat exchange box 3 is provided with a heat exchange pipe 31, an air outlet 32 ​​and a water outlet 33. One end of the heat exchange pipe 31 is connected to the air outlet 32. Water for heat exchange is contained in the heat exchange box 3, and the heat exchange pipe 31 is immersed in the water. The furnace body 1 includes an inner tank 11 and an outer tank 12. The inner tank 11 and the outer tank 12 are connected to each other through a pipeline. The inner tank 11 is provided with a first exhaust valve 111, and a heating device 2 is provided inside the outer tank 12. A water inlet valve 121 is provided on the surface. The first exhaust valve 111 is connected to the heat exchange pipe 31 through a pipeline, and the water inlet valve 121 is connected to the water outlet 33 through a pipeline.

[0038] In this embodiment, when dewaxing is performed, the shell mold with wax is placed in the inner tank 11 of the furnace body 1, and the wax in the shell mold is melted and flows out by high-temperature heating, thereby obtaining a finished shell mold; since the wax expands when it melts, in order to prevent the shell mold from cracking, a certain pressure needs to be applied to the shell mold during dewaxing, wherein a heating device 2 is provided inside the outer tank 12, and the heating device 2 can heat the inner tank 11 on the one hand to melt the wax in the shell mold, and on the other hand, it can generate steam pressure by heating water at high temperature, and then transmit the pressure to the inner tank 11 through the pipeline between the inner tank 11 and the outer tank 12, thereby ensuring that the shell mold will not be cracked during dewaxing; the heat exchange box 3 is arranged in the furnace On one side of the body 1, a heat exchange tube 31 is provided in the heat exchange box 3. The first exhaust valve 111 on the inner tank 11 is connected to the heat exchange tube 31 inside the heat exchange box 3 through a pipeline. The heat exchange tube 31 is immersed in the water inside the heat exchange box 3. The high-temperature steam in the inner tank 11 is discharged through the first exhaust valve 111 and reaches the heat exchange tube 31, and exchanges heat with the water in the heat exchange box 3. After the heat exchange is completed, the steam is discharged from the air outlet 32. The water inside the heat exchange box 3 is heated and then discharged from the water outlet 33, and is sent to the outer tank 12 through the pipeline and the water inlet valve 121 on the outer tank 12, so as to be heated by the heating device 2 in the outer tank 12 to generate steam, so as to continue to provide pressure for the inner tank 11, forming a cycle.

[0039] Among them, the hot water after heat exchange in the heat exchange box 3 is sent to the heating device 2. The hot water with a high initial temperature can shorten the heating time of the heating device 2, speed up the pressure increase speed, and effectively prevent the shell mold from cracking due to the slow pressure increase speed, thereby ensuring the quality of the shell mold. At the same time, it can also reduce the consumption of electricity and save operating costs.

[0040] Please refer to Figure 1 In this embodiment, the heat exchange tube 31 is a broken line structure including multiple corners, so that the heat exchange area between the heat exchange tube 31 and the water can be increased, so that the water in the heat exchange box 3 can absorb the heat of the steam in the heat exchange tube 31 more quickly.

[0041] In other embodiments, the heat exchange tube 31 is a spiral structure to increase the contact area with water and speed up the heat exchange rate. In addition, it can also be an arc with multiple bending points.

[0042] Please refer to Figure 1 In this embodiment, the heat exchange box 3 also includes a water replenishment port 34 and a pressure relief port 35. The water replenishment port 34 and the pressure relief port 35 are arranged on the surface of the heat exchange box 3. The water replenishment port 34 is used to replenish water in the heat exchange box 3, and the pressure relief port 35 is used to relieve pressure. Since the water in the heat exchange box 3 will evaporate and produce a certain amount of gas after absorbing heat, the pressure is relieved through the pressure relief port 35, which can prevent the pressure in the heat exchange box 3 from being too high and ensure safety.

[0043] Please refer to Figure 1In this embodiment, a solenoid valve 4 is provided on the pipeline between the first exhaust valve 111 and the heat exchange tube 31. After the dewaxing work is completed, when the inner liner 11 is exhausted, the solenoid valve 4 can realize segmented exhaust by controlling the switch of this section of the pipeline, thereby preventing the air pressure in the inner liner 11 from becoming low instantly, avoiding the collapse and deformation of the shell mold, and ensuring the quality of the shell mold; in addition to the solenoid valve 4, other valves with control effects can also be selected, and no specific restrictions are made here.

[0044] Please refer to Figure 1 In this embodiment, the heating device 2 is connected to the water inlet valve 121. The heating device 2 includes a plurality of heating tubes 21, which are used to speed up the speed of generating steam and increase the pressure increase speed. After the water in the heat exchange box 3 is heat exchanged, the hot water enters the heating tube 21 of the heating device 2 through the water inlet valve 121 of the outer tank 12. By heating the hot water in the heating tube 21, steam is generated, thereby increasing the pressure inside the outer tank 12. Then, the pressure can be released into the inner tank 11 through the pipeline connecting the outer tank 12 and the inner tank 11. In addition, the heating device 2 also heats the inner tank 11 at the same time, thereby increasing the temperature inside the inner tank 11, melting the wax in the shell mold, and ensuring the normal dewaxing of the shell mold.

[0045] Please refer to Figures 1 to 3 In this embodiment, a connecting pipe 13 is provided between the inner liner 11 and the outer liner 12, and a connecting valve 131 is provided on the connecting pipe 13. The inner liner 11 and the outer liner 12 are connected to each other through the connecting pipe 13. The connecting valve 131 is used to control the switch of the connecting pipe 13, thereby controlling the connection between the outer liner 12 and the inner liner 11, so as to facilitate the control of the outer liner 12 to apply pressure to the inner liner 11.

[0046] Please refer to Figure 1 In this embodiment, a separation mechanism is provided on one side of the connection between the outer tank 12 and the connecting pipeline 13, and the separation mechanism includes a steam-water separation baffle 122. The steam-water separation baffle 122 and the inner wall of the outer tank 12 form an isolation chamber 123. The connecting pipeline 13 is communicated with the isolation chamber 123. The steam-water separation baffle 122 and the inner wall of the outer tank 12 surround the isolation chamber 123. The isolation chamber 123 covers the connection between the outer tank 12 and the connecting pipeline 13. The water vapor generated by the heating device 2 enters the connecting pipeline 13 after passing through the steam-water separation baffle 122. The steam-water separation baffle 122 can isolate most of the water in the water vapor to prevent excessive water from entering the inner tank 11 and affecting the dewaxing effect.

[0047] Please refer to Figures 1 to 3 In this embodiment, the outer container 12 includes a second exhaust valve 124, which is disposed at the top of the outer container 12 and is used to exhaust excess steam in the outer container 12 after the dewaxing work is completed.

[0048] Please refer to Figure 1In this embodiment, the inner tank 11 is also provided with a wax drain valve 112 and a water drain valve 113, both of which are arranged at the bottom of the inner tank 11. After dewaxing is completed, the wax drain valve 112 is used to discharge the melted wax in the inner tank 11, and the water drain valve 113 is used to discharge the condensed water in the inner tank 11, thereby ensuring the cleanliness of the inner tank 11.

[0049] It should be noted that, due to the general fluidity of wax, after the wax is completely melted, when the inner liner 11 is exhausted, a certain air pressure can be retained in the inner liner 11, and then the wax exhaust valve 112 is opened to press the wax out by the residual pressure to ensure complete exhaustion.

[0050] Specifically, one end of the outlet of the wax drain valve 112 and the water drain valve 113 both pass through the outer container 12 to the outside of the outer container 12 so that the wax and water can be discharged outside the furnace body 1 .

[0051] Preferably, in some embodiments, the outlet end of the wax drain valve 112 is connected to a storage container for recycling the melted wax to avoid waste.

[0052] Please refer to Figures 1 to 3 In this embodiment, one side of the inner pot 11 is arranged in the outer pot 12. When the heating device 2 in the outer pot 12 heats and generates steam, the inner pot 11 can be heated at the same time to increase the temperature in the inner pot 11, thereby melting the wax in the shell mold. The outer pot 12 is exposed on the other side of the inner pot 11, and a furnace door 114 is provided. By opening and closing the furnace door 114, the shell mold can be easily put in and taken out.

[0053] Preferably, a rotating mechanism 115 is provided on one side of the furnace door 114 , and the furnace door 114 is rotatably connected to the rotating mechanism 115 , so that the furnace door 114 can be rotated to open and close conveniently through the rotating mechanism 115 .

[0054] Specifically, a furnace cover 125 is provided on a side of the outer container 12 away from the furnace door 114 , and the furnace cover 125 is used to open the outer container 12 to facilitate observation of the internal situation of the outer container 12 .

[0055] For details, please refer to Figure 1 The principles and steps of the automatic dewaxing furnace of the present application when in use are as follows:

[0056] First, the furnace door 114 is opened, and the shell mold with wax is placed in the inner pot 11, and then the furnace door 114 is closed, and then the connecting valve 131 and the heating device 2 are opened. While the heating device 2 heats the inner pot 11, it also heats the water in the heating tube 21 to evaporate and generate steam. The steam enters the inner pot 11 through the connecting pipe 13, thereby applying pressure to the shell mold inside. After the wax in the shell mold is completely melted, the connecting valve 131 is closed, and the first exhaust valve 111 is opened. The exhaust is realized in sections through the control of the solenoid valve 4. The steam is discharged from the air outlet 32 ​​after heat exchange through the heat exchange tube 31, and the water after heat exchange in the heat exchange box 3 is continuously replenished to the heating device 2 for generating steam. When the inner tank 11 is exhausted, when the air pressure in the inner tank 11 drops to 0.2MPa, the first exhaust valve 111 is closed, and the wax discharge valve 112 is opened. The wax is discharged from the wax discharge valve 112 to the storage container for recovery by utilizing the remaining pressure of 0.2MPa. After all the wax is discharged, the drain valve 113 is opened to discharge the water, thereby completing a dewaxing cycle.

[0057] Among them, the control of various valves can be achieved by an electronic control system. Through the preset time and real-time monitoring of internal pressure data, the dewaxing work can be automated.

[0058] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. An automatic dewaxing furnace, comprising a furnace body, characterized in that: The invention also includes a heat exchange box arranged on one side of the furnace body, the heat exchange box is provided with a heat exchange tube, an air outlet and a water outlet, one end of the heat exchange tube is connected to the air outlet, water for heat exchange is contained in the heat exchange box, the heat exchange tube is immersed in the water, the furnace body includes an inner tank and an outer tank, the inner tank and the outer tank are connected to each other through a pipeline, the inner tank is provided with a first exhaust valve, the outer tank is provided with a heating device inside, and a water inlet valve is provided on the surface, the first exhaust valve is connected to the heat exchange tube through a pipeline, and the water inlet valve is connected to the water outlet through a pipeline.

2. The automatic dewaxing furnace according to claim 1, characterized in that: The heat exchange tube is a folded line with multiple corners, or a spiral structure.

3. The automatic dewaxing furnace according to claim 1, characterized in that: The heat exchange box further comprises a water replenishment port and a pressure relief port, and the water replenishment port and the pressure relief port are arranged on the surface of the heat exchange box.

4. The automatic dewaxing furnace according to claim 1, characterized in that: A solenoid valve is provided on the pipeline between the first exhaust valve and the heat exchange tube.

5. The automatic dewaxing furnace according to claim 1, characterized in that: The heating device is connected to the water inlet valve, and the heating device includes a plurality of heating pipes.

6. The automatic dewaxing furnace according to claim 1, characterized in that: A connecting pipeline is provided between the inner container and the outer container, a connecting valve is provided on the connecting pipeline, and the inner container and the outer container are connected to each other through the connecting pipeline.

7. The automatic dewaxing furnace according to claim 6, characterized in that: A separation mechanism is provided at one side of the connection between the outer container and the connecting pipeline. The separation mechanism includes a steam-water separation baffle. The steam-water separation baffle and the inner wall of the outer container form an isolation cavity. The connecting pipeline is connected to the isolation cavity.

8. The automatic dewaxing furnace according to claim 1, characterized in that: The outer container includes a second exhaust valve, and the second exhaust valve is arranged on the top of the outer container.

9. The automatic dewaxing furnace according to claim 1, characterized in that: The inner container is also provided with a wax drain valve and a water drain valve, and the wax drain valve and the water drain valve are arranged at the bottom of the inner container.

10. The automatic dewaxing furnace according to claim 1, characterized in that: One side of the inner container is arranged inside the outer container, and the other side extends out of the outer container. An oven door is arranged at one end of the inner container away from the outer container.

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