Optical temperature measuring device of vacuum induction melting furnace

Abstract

The utility model relates to the field of special metallurgy, and discloses an optical temperature measuring device for a vacuum induction melting furnace, which comprises a water-cooling connecting assembly, a temperature measuring light ray passes through the center of the water-cooling connecting assembly, the water-cooling connecting assembly is fixed on an observation port on the side wall of a chamber of the vacuum induction melting furnace, and a first end of the water-cooling connecting assembly faces the melting furnace; the second end is hermetically connected with the first end of the vacuum ball valve; temperature measuring light can pass through the vacuum ball valve; the detachable glass window sealing cover is arranged at the second end of the vacuum ball valve; the first bracket is fixed at the second end of the vacuum ball valve; the second bracket is fixedly connected with the first bracket; the holder is fixed on the second bracket; and the optical temperature measuring device is arranged on the holder. According to the optical temperature measuring device, the temperature measuring accuracy can be improved, the service life of the optical temperature measuring device can be prolonged, and the technical problems that a temperature measuring light path is sealed, the service life of a glass window is short, the use safety of the glass window is low, and temperature measuring light is blocked by glass window stickers are fundamentally solved.

Description

Technical Field

[0001] The utility model relates to the field of special metallurgy, in particular to an optical temperature measuring device for a vacuum induction melting furnace. Background Art

[0002] A vacuum induction melting furnace (VIM) is a device that uses electromagnetic induction heating to melt metals under vacuum conditions. It is widely used in the production of high-quality alloys, particularly in the aerospace, medical, automotive, and nuclear industries. VIMs utilize medium-frequency induction heating technology, using an alternating electromagnetic field to generate heat within a conductive material, thereby melting the metal. An induction coil surrounds a crucible containing the metal to be melted. When an alternating current passes through the coil, it induces eddy currents in the metal, rapidly heating it and melting it.

[0003] The vacuum induction melting furnace mainly includes the following components;

[0004] Furnace body: Provides a sealed vacuum environment and is usually made of materials that can withstand high temperatures and maintain vacuum integrity.

[0005] Medium frequency power supply: provides the power required for induction heating, including power supply, transformer and control circuit.

[0006] Vacuum system: Consists of a vacuum pump, vacuum gauge and valves, responsible for generating and maintaining a vacuum environment.

[0007] Cooling system: usually uses water cooling channels and fans to prevent overheating.

[0008] Electronic control system: monitors and controls temperature, vacuum degree and input power.

[0009] The vacuum level required for a vacuum induction melting furnace is a key factor in ensuring a smooth melting process and producing high-quality molten metal. According to the JB / T 10551-2006 standard, "Vacuum Technology - Vacuum Induction Melting Furnaces," the vacuum level in a vacuum induction melting furnace must generally be achieved and maintained within a certain range to meet the melting requirements of different metal materials. Different vacuum induction melting furnaces may have different specific vacuum and temperature requirements, which vary depending on the metal being melted, the size of the furnace, and the specifics of the melting process.

[0010] Since the melting of materials in a vacuum induction furnace is carried out in a closed vacuum chamber, the efficiency of measuring the temperature of the molten metal using contact temperature measuring devices (such as thermocouples) is too low and cannot meet production needs. If an optical temperature measuring device is used to measure the temperature of the molten metal, the following technical problems need to be solved:

[0011] 1. The shape and height of the melting crucible may block the temperature measuring light. Therefore, the temperature measuring light needs to be adjusted according to the shape and height of the melting crucible to avoid blocking the temperature measuring light and affecting the accuracy of the temperature measurement results.

[0012] 2. The temperature in the melting chamber of the vacuum induction melting furnace is 600 to 1000 degrees. If an optical temperature measuring device is directly installed on the wall of the vacuum induction melting furnace, the high temperature will be transmitted to the optical temperature measuring device through the temperature measuring light path, affecting the service life of the optical temperature measuring device.

[0013] 3. The vacuum environment inside the melting chamber of the vacuum induction melting furnace requires a sealed path for the temperature measurement light to avoid damaging the vacuum environment. Therefore, a sealed observation port is required for the temperature measurement light to pass through. The preferred observation port is a glass sealed window on the side wall of the melting chamber of the vacuum induction melting furnace. Using a glass sealed window as an observation port requires solving the following two technical problems.

[0014] 3.1. Since the temperature in the melting chamber of the vacuum induction melting furnace is 600 to 1000 degrees and the melting point of glass is 500 to 1400 degrees, the high temperature in the melting chamber of the vacuum induction melting furnace will have a serious impact on the sealed windows made of glass. The high temperature will reduce the service life of the sealed windows made of glass and reduce the safety of the glass windows.

[0015] 3.2. The sealed window for glass production is located on one side of the vacuum induction melting furnace's melting chamber. Dust, slag, and other debris generated during production in the vacuum induction melting furnace can adhere to the sealed window, obscuring the temperature measurement light and causing inaccurate temperature measurements, which in turn affects product quality. Furthermore, dust, slag, and other debris can adhere to the sealed window on the side of the vacuum induction melting furnace's melting chamber. Removing these debris requires production suspension, reducing production efficiency. Utility Model Content

[0016] The Summary of the Utility Model introduces a series of simplified concepts, which are simplifications of existing technologies in the field and are further described in detail in the Detailed Description of the Utility Model. The Summary of the Utility Model of this utility model is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0017] The technical problem to be solved by the utility model is to provide an optical temperature measuring device for a vacuum induction melting furnace in view of the defects in the prior art.

[0018] In order to solve the above technical problems, the utility model provides an optical temperature measuring device for a vacuum induction melting furnace, comprising:

[0019] A water-cooled connection assembly is formed in a sleeve shape, the center of which is for the temperature measurement light to pass through, and is fixed to the observation port on the top wall of the vacuum induction melting furnace chamber, with its first end facing the melting furnace and its second end sealingly connected to the first end of the vacuum ball valve;

[0020] A vacuum ball valve, which allows the temperature measurement light to pass through; the vacuum ball valve is used to control the air flow into the water cooling connection assembly pipeline;

[0021] A detachable glass window, the sealing cover of which is mounted on the second end of the vacuum ball valve; preferably, the sealing cover is mounted on the second end of the vacuum ball valve via a flange;

[0022] a first bracket, which is fixed to the second end of the vacuum ball valve;

[0023] a second bracket fixedly connected to the first bracket;

[0024] a pan / tilt head fixed on the second bracket;

[0025] The temperature measuring device is installed on the pan-tilt platform.

[0026] Preferably, the optical temperature measuring device of the vacuum induction melting furnace is further improved, and the water-cooling connection assembly includes:

[0027] a tube and a cooling jacket sleeved on the tube;

[0028] The cooling jacket has a water inlet at the end closest to the vacuum induction melting furnace and a water outlet at the end remote from the vacuum induction melting furnace, through which coolant flows. Locating the cooling jacket's water inlet near the end of the vacuum induction melting furnace facilitates low-temperature cooling water in cooling the pipe near that end.

[0029] Preferably, the optical temperature measuring device for the vacuum induction melting furnace is further improved, wherein the water-cooling connection assembly is welded and fixed to the observation port on the side wall of the vacuum induction melting furnace chamber;

[0030] Alternatively, the water-cooling connection assembly is fixed to the observation port on the side wall of the vacuum induction melting furnace chamber through a flange seal.

[0031] Preferably, the optical temperature measuring device for a vacuum induction melting furnace is further improved, wherein the first bracket is formed as a plate-shaped bracket;

[0032] The first end of the first bracket is sleeved on the second end of the vacuum ball valve.

[0033] Preferably, the optical temperature measuring device for a vacuum induction melting furnace is further improved, wherein the second bracket is formed as an L-shaped bracket;

[0034] The short side of the second bracket is fixed to the lower part of the side of the first bracket facing away from the vacuum ball valve;

[0035] The long side of the second bracket fixes the gimbal.

[0036] Preferably, the optical temperature measuring device for the vacuum induction melting furnace is further improved, wherein the platform is a manual rotating platform;

[0037] Alternatively, the gimbal is a motorized rotating gimbal.

[0038] Preferably, the optical temperature measuring device for the vacuum induction melting furnace is further improved, and the detachable glass window is mounted on the second end of the vacuum ball valve through a flange sealing cover.

[0039] Preferably, the optical temperature measuring device of the vacuum induction melting furnace is further improved, and the detachable glass window is made of optical glass with a melting point of more than 1000 degrees, thereby increasing the safety of the detachable glass window.

[0040] Preferably, the optical temperature measuring device of the vacuum induction melting furnace is further improved, and the optical temperature measuring device is an infrared thermometer.

[0041] The utility model solves the problems existing in the prior art through the above structural design;

[0042] 1. The utility model is arranged on the observation port on the top wall of the vacuum induction melting furnace chamber, emitting temperature measuring light from top to bottom, which can effectively avoid the influence of the crucible shape and crucible height position on the temperature measuring light and improve the temperature measurement accuracy.

[0043] In addition, the utility model sets the optical temperature measuring device on the pan-tilt platform, and adjusts the angle of the temperature measuring light entering the melting chamber of the vacuum induction melting furnace through the pan-tilt platform, which can further avoid the influence of the shape and height position of the melting crucible on the temperature measuring light and improve the temperature measurement accuracy.

[0044] 2. This utility model separates the optical temperature measuring device and the water-cooling connection assembly to physically isolate the temperature. Furthermore, the water-cooling connection assembly is designed with a cooling sleeve to reduce the temperature through the flow of coolant. This utility model fundamentally solves the problem of the high temperature in the vacuum induction melting furnace's melting chamber affecting the service life of the optical temperature measuring device, thereby extending the service life of the optical temperature measuring device.

[0045] 3. In conjunction with the above-mentioned point 2, the water-cooled connection assembly with a cooling sleeve designed in this utility model also reduces the temperature at the removable glass window, ensuring that the removable glass window is not affected by high temperatures. In the preferred embodiment, optical glass with a melting point of 1000°C is selected to manufacture the removable glass window, fundamentally solving the technical problems of sealing the temperature measurement light path, short service life of glass-made windows, and low safety of glass-made windows.

[0046] 4. The water-cooled connection assembly and vacuum ball valve of this utility model prevent the glass production window from being directly exposed to dust, slag, and other adhesives generated during production in the vacuum induction melting furnace. In particular, when temperature measurement is not required, the vacuum ball valve can be closed to completely isolate dust, slag, and other adhesives. This solves the technical problem of reducing the obstruction of temperature measurement light by dust, slag, and other adhesives.

[0047] 5. The detachable glass window of the utility model is combined with a vacuum ball valve. The glass window can be cleaned or replaced without stopping production by closing the vacuum ball valve, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings herein are intended to illustrate the general characteristics of methods, structures, and / or materials used in certain exemplary embodiments of the present invention, supplementing the descriptions in the specification. However, the drawings herein are schematic diagrams not drawn to scale and may not accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings herein should not be interpreted as defining or limiting the range of values ​​or properties encompassed by the exemplary embodiments of the present invention. The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0049] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0050] Figure 2 It is a schematic diagram of the utility model in use state.

[0051] Description of the accompanying drawings:

[0052] Water cooling connection assembly 1;

[0053] Tube 1.1;

[0054] Cooling jacket 1.2;

[0055] Water inlet 1.2.1;

[0056] Water outlet 1.2.2;

[0057] Vacuum induction melting furnace chamber top wall 2;

[0058] Melting furnace 3;

[0059] Vacuum ball valve 4;

[0060] Removable glass window 5;

[0061] First bracket 6;

[0062] Second bracket 7;

[0063] PTZ 8;

[0064] Optical temperature measuring device 9. DETAILED DESCRIPTION

[0065] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can fully understand the other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. The details in this specification can also be applied based on different viewpoints and various modifications or changes can be made without departing from the overall design concept of the utility model. It should be noted that, unless there is a conflict, the following embodiments and the features therein can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, the element can be directly connected or coupled to the other element, or there can be an intermediate element. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there is no intermediate element. The same figure numbers always represent the same elements throughout the drawings.

[0066] First embodiment, reference Figure 1 Combine Figure 2 As shown, the utility model provides an optical temperature measuring device for a vacuum induction melting furnace, comprising:

[0067] A water-cooled connection assembly 1 is formed in a sleeve shape, the center of which is for the temperature measurement light to pass through. It is fixed to the observation port of the side wall 2 of the vacuum induction melting furnace chamber, with its first end facing the melting furnace 3 and its second end sealedly connected to the first end of the vacuum ball valve 4;

[0068] A vacuum ball valve 4, which allows the temperature measuring light to pass through;

[0069] A detachable glass window 5, whose sealing cover is installed at the second end of the vacuum ball valve 4; preferably, the detachable glass window 5 is made of optical glass with a melting point of more than 1000 degrees, and the detachable glass window 5 is installed at the second end of the vacuum ball valve 4 through a flange sealing cover;

[0070] A first bracket 6, which is fixed to the second end of the vacuum ball valve 4;

[0071] A second bracket 7, which is fixedly connected to the first bracket 6;

[0072] a pan / tilt platform 8 fixed on the second bracket 7;

[0073] The optical temperature measuring device 9 is installed on the pan-tilt platform 8. Preferably, the optical temperature measuring device 9 is an infrared thermometer.

[0074] Optionally, the water-cooling connection assembly 1 is welded and fixed to the observation port of the side wall 2 of the vacuum induction melting furnace chamber;

[0075] Alternatively, the water-cooling connection assembly 1 is fixed to the observation port of the side wall 2 of the vacuum induction melting furnace chamber through a flange seal.

[0076] In addition, it should be understood that although the terms "first", "second", etc. may be used herein to describe different elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the exemplary embodiments of the present invention, the first element, component, region, layer or part discussed below may also be referred to as a second element, component, region, layer or part.

[0077] Second embodiment, continue to refer to Figure 1 As shown, the present invention provides a preferred embodiment of the water-cooling connection assembly that can be used in the first embodiment, including:

[0078] Tube 1.1 and cooling jacket 1.2 sleeved on tube 1.1;

[0079] The cooling jacket 1.2 has a water inlet 1.2.1 formed at one end thereof close to the vacuum induction melting furnace and a water outlet 1.2.2 formed at one end thereof away from the vacuum induction melting furnace, and coolant flows inside the cooling jacket.

[0080] The third embodiment, continue to refer to Figure 1 As shown, the present invention provides a preferred embodiment that can be used for the first bracket, the second bracket and the pan / tilt head in the first embodiment, including:

[0081] The first bracket 6 is formed as a plate-shaped bracket, and the first end of the first bracket 6 is sleeved on the second end of the vacuum ball valve 4;

[0082] The second bracket 7 is formed as an L-shaped bracket, the short side of the second bracket 7 is fixed to the lower part of the side of the first bracket 6 facing away from the vacuum ball valve 4, and the long side of the second bracket 7 is fixed to the pan / tilt head 8;

[0083] The pan-tilt head 8 is a manual rotating pan-tilt head; or, the pan-tilt head 8 is an electric rotating pan-tilt head.

[0084] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this invention belongs. It will also be understood that, unless expressly defined herein, terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, rather than being interpreted in an ideal or overly formal sense.

[0085] The present invention has been described in detail above through specific implementation methods and examples, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may make many variations and improvements, which should also be considered as the scope of protection of the present invention.

Claims

1. An optical temperature measuring device for a vacuum induction melting furnace, characterized in that: include: A water-cooling connection assembly (1) is formed in a sleeve shape, the center of which is for temperature measurement light to pass through, and is fixed to an observation port on the top wall (2) of the vacuum induction melting furnace chamber, with a first end thereof facing the melting furnace (3) and a second end thereof being sealed and connected to a first end of a vacuum ball valve (4); A vacuum ball valve (4) capable of allowing temperature measurement light to pass through; A detachable glass window (5) with a sealing cover mounted on the second end of the vacuum ball valve (4); A first bracket (6) fixed to the second end of the vacuum ball valve (4); A second bracket (7) fixedly connected to the first bracket (6); A pan / tilt platform (8) fixed on the second bracket (7); An optical temperature measuring device (9) is mounted on the pan-tilt platform (8).

2. The optical temperature measuring device for a vacuum induction melting furnace according to claim 1, wherein: The water cooling connection assembly (1) comprises: A tube (1.1) and a cooling jacket (1.2) sleeved on the tube (1.1); The cooling sleeve (1.2) has a water inlet (1.2.1) formed at one end close to the vacuum induction melting furnace and a water outlet (1.2.2) formed at one end away from the vacuum induction melting furnace, and coolant flows inside the cooling sleeve.

3. The optical temperature measuring device for a vacuum induction melting furnace according to claim 1, wherein: The water-cooling connection assembly (1) is welded and fixed to the observation port of the side wall (2) of the vacuum induction melting furnace chamber; Alternatively, the water-cooling connection assembly (1) is fixed to the observation port of the side wall (2) of the vacuum induction melting furnace chamber through a flange seal.

4. The optical temperature measuring device for a vacuum induction melting furnace according to claim 1, wherein: The first bracket (6) is formed as a plate-shaped bracket; The first end of the first bracket (6) is sleeved on the second end of the vacuum ball valve (4).

5. The optical temperature measuring device for a vacuum induction melting furnace according to claim 1, wherein: The second bracket (7) is formed as an L-shaped bracket; The short side of the second bracket (7) is fixed to the lower part of the side of the first bracket (6) facing away from the vacuum ball valve (4); The long side of the second bracket (7) is fixed to the pan / tilt platform (8).

6. The optical temperature measuring device for a vacuum induction melting furnace according to claim 1, wherein: The pan / tilt head (8) is a manual rotating pan / tilt head; Alternatively, the pan / tilt head (8) is an electric rotating pan / tilt head.

7. The optical temperature measuring device for a vacuum induction melting furnace according to claim 1, wherein: The detachable glass window (5) is mounted on the second end of the vacuum ball valve (4) through a flange sealing cover.

8. The optical temperature measuring device for a vacuum induction melting furnace according to claim 7, wherein: The detachable glass window (5) is made of optical glass with a melting point of more than 1000 degrees.

9. The optical temperature measuring device for a vacuum induction melting furnace according to any one of claims 1 to 8, wherein: The optical temperature measuring device (9) is an infrared thermometer.

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