Rotary window device for smelting chamber of vacuum induction smelting furnace

Abstract

The invention discloses a rotary window device for a smelting chamber of a vacuum induction smelting furnace, which comprises a base, a first sealing cavity, a middle view path and a second sealing cavity are formed on the base, and the base is mounted at an observation port of the smelting chamber; the gate valve reciprocates in the second sealing cavity to shield or expose the middle visual path and the observation port; the fixed glass observation window is formed on the top wall of the base; the rotary observation disc is arranged in the first sealing cavity, and a plurality of rotary glass observation windows are formed; and the driving device drives the rotary observation disc to rotate, so that a certain rotary glass observation window is aligned with the fixed glass observation window. Two layers of protection are designed, so that the service life of the observation equipment can be greatly prolonged, and the production efficiency is improved. According to the invention, two control schemes of a sensor and a timer are also designed to control the rotary observation disc to rotate and update the rotary glass observation window, so that the defect that the perspective of the observation window is insufficient through manual observation is overcome, active early warning replacement aiming at the perspective of the observation window is realized, and the usability of the observation window during production can be guaranteed.

Description

Technical Field

[0001] The invention relates to the field of special metallurgy, in particular to a rotating window device for a smelting chamber of a vacuum induction smelting furnace. Background Art

[0002] 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, especially in the aerospace, medical, automotive and nuclear industries. The vacuum induction melting furnace uses medium-frequency induction heating technology to generate heat in conductive materials through an alternating electromagnetic field to achieve metal melting. The induction coil surrounds the crucible containing the metal to be melted. When the alternating current passes through the coil, it will generate induced eddy currents in the metal, rapidly heating up and melting the metal.

[0003] The vacuum induction melting furnace mainly includes the following components; Furnace body: Provides a sealed vacuum environment and is usually made of materials that can withstand high temperatures and maintain vacuum integrity.

[0004] Medium frequency power supply: provides the power required for induction heating, including power supply, transformer and control circuit.

[0005] Vacuum system: Consists of a vacuum pump, vacuum gauge and valves, responsible for generating and maintaining a vacuum environment.

[0006] Cooling system: usually uses water cooling channels and fans to prevent overheating.

[0007] Electronic control system: monitors and controls temperature, vacuum degree and input power.

[0008] The working pressure of a vacuum induction melting furnace (VIM) is usually related to its design and operating conditions, refer to GB / T10067.35-2015 "Basic Technical Conditions for Electric Heating Devices Part 35: Medium Frequency Vacuum Induction Melting Furnace" standard. It should be noted that the working pressure and operating conditions of the vacuum induction melting furnace should strictly comply with the corresponding safety standards and operating procedures to ensure the safety of equipment and personnel. The vacuum degree requirement of the vacuum induction melting furnace is a key factor to ensure the smooth progress of the melting process and obtain high-quality molten metal. According to the JB / T 10551-2006 "Vacuum Technology Vacuum Induction Melting Furnace" standard, the vacuum degree of the vacuum induction melting furnace usually needs to reach and be maintained within a certain range to meet the melting requirements of different metal materials.

[0009] Accordingly, because the vacuum environment needs to be maintained, when the smelting material is smelted in the smelting chamber, the outside operator cannot directly observe through the smelting chamber wall with the naked eye, and needs to observe the smelting situation in the smelting chamber through the designed window to checkFigure 1 As shown. When melting materials, splashes and dust will be generated, which will contaminate the inside of the window and hinder the observer's observation effect. If you want to clean the inside of the window, you must stop production and release the vacuum environment in the chamber, which will interrupt production, delay production cycle, and reduce production efficiency.

[0010] In the field of metallurgy, a common solution to the pollution inside the observation window is to add a purge device to purge the inside of the observation window. However, the solution of adding a purge device cannot be used in the melting chamber of a vacuum induction melting furnace, as it will destroy the vacuum environment. Moreover, adding a purge device can only purge floating dust, but cannot remove stubborn dust. Summary of the invention

[0011] A series of simplified concepts are introduced in the Summary of the Invention, which are all simplifications of the prior art in the field, and will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0012] The technical problem to be solved by the present invention is to provide a rotating window device for the melting chamber of a vacuum induction melting furnace, which can avoid splashing and dust contaminating the inner side of the observation window during the melting of the smelting material and causing production interruption, extend the maintenance time interval of the vacuum induction melting furnace, and improve production efficiency.

[0013] In order to solve the above technical problems, the present invention provides a vacuum induction melting furnace melting chamber rotating window device, comprising: The base 3 is formed into a hollow sealed structure, which is formed with a first sealed cavity 4, an intermediate visual path 5 and a second sealed cavity 6 arranged in sequence from top to bottom, and is sealed and fixedly mounted on the observation port on the top wall of the melting chamber of the vacuum induction melting furnace; The gate valve 7 is inserted into the second sealed cavity 6 of the base 3 from one side, and can reciprocate in the second sealed cavity 6 to cover or expose the intermediate visual path 5 and the observation port while maintaining a sealed state; A fixed glass observation window 8, which forms the top wall of the base 3 above the first sealed cavity 4, is aligned with the intermediate visual path 5 and the observation port; A rotating observation disk 9 is arranged in the first sealed cavity 4 and is formed in a disk shape, on which a plurality of rotating glass observation windows 10 are evenly formed, which are adapted to the shapes and sizes of the fixed glass observation windows 8, the intermediate visual path 5 and the observation port; A driving device 11, which is fixed on the base 3 and is used to drive the rotating observation disk 9 to rotate so that a certain rotating glass observation window 10 is aligned with the fixed glass observation window 8; Among them, the rotating window device of the melting chamber of the vacuum induction melting furnace always remains in a sealed state, and the fixed glass observation window 8, the first sealed cavity 4, the rotating glass observation window 10, the intermediate visual path 5, the second sealed cavity 6 and the observation port jointly provide a visual path for observing the internal situation of the melting chamber of the vacuum induction melting furnace. The rotating glass observation window 10 that is not aligned with the fixed glass observation window 8 is accommodated in the first sealed cavity 4 without overlapping with the intermediate visual path 5.

[0014] Preferably, the rotating window device of the vacuum induction melting furnace melting chamber is further improved, and the gate valve covers the observation port at the initial stage and when not observing, thereby preventing the smelting material from splashing and dust from flying out and sticking to the rotating observation disk 9.

[0015] Preferably, the vacuum induction melting furnace melting chamber rotating window device is further improved, further comprising: The sensor is arranged in the second sealed cavity 6 or outside the fixed glass observation window. It is used to detect the light transmittance of the rotating glass observation window 10 that is currently aligned with the fixed glass observation window 8. When the detected light transmittance is less than a specified threshold, it sends a signal to trigger the driving device 11 to drive the rotating observation disk 9 to rotate, so that the other rotating glass observation window 10 is aligned with the fixed glass observation window 8.

[0016] Light transmittance can be determined by comparing any of the following parameters with a specified threshold; 1) Transmittance: refers to the ratio of the luminous flux passing through the material to the incident luminous flux, usually expressed as a percentage.

[0017] 2) Light Transmittance: Similar to light transmittance, it also describes the ratio of the amount of light passing through the material to the amount of incident light.

[0018] 3) Transmission Coefficient: It describes the attenuation of light waves when passing through a material. It is a dimensionless value.

[0019] 4) Absorption Coefficient: describes the ability of a material to absorb light.

[0020] 5) Refractive Index: describes the ratio of the speed of light propagating in a material to the speed of light propagating in a vacuum, and affects the refraction and transmission of light.

[0021] 6) Optical Density: Usually used to describe the reduction in light intensity after passing through a material. It is a logarithmic ratio.

[0022] 7) Spectral Transmittance: refers to the transmittance of a material at a specific wavelength.

[0023] 8) Visible Light Transmittance: refers to the material's transmittance to light within the visible spectrum.

[0024] Preferably, the vacuum induction melting furnace melting chamber rotating window device is further improved, further comprising: The sensor also receives the feedback stroke of the drive device 11, and sends a replacement alarm signal if the rotating observation disk 9 completes the specified angle rotation. By calculating the feedback stroke of the drive device 11, it can be determined that all rotating glass observation windows 10 do not meet the use requirements, so they can only be stopped for replacement.

[0025] The designated angle is determined by the number of rotating glass observation windows 10 and the redundancy that the system can bear. For example, if 6 rotating glass observation windows 10 are evenly arranged, the designated angle can be 360 ​​degrees in the case of loose redundancy, and the designated angle can be 300 degrees in the case of strict redundancy, that is, the replacement prompt starts when there is only one clear rotating glass observation window 10 left.

[0026] Preferably, the vacuum induction melting furnace melting chamber rotating window device is further improved, further comprising: The timer sends a signal to trigger the driving device 11 to drive the rotating observation disk 9 to rotate, so that the other rotating glass observation window 10 is aligned with the fixed glass observation window 8. The solution controlled by the timer has the advantages of saving costs and simple structure compared to the solution of the sensor, but the control accuracy is limited, and it is possible that the rotating glass observation window 10 is not replaced when the vision is unclear, or the rotating glass observation window 10 is replaced when the vision is clear.

[0027] Preferably, the vacuum induction melting furnace melting chamber rotating window device is further improved, and when the timer reaches a specified time, a replacement alarm signal is issued. When the timer reaches the specified time, it is considered that the perspective of all rotating glass observation windows 10 cannot meet the use requirements, so production can only be stopped for replacement.

[0028] Preferably, the rotating window device of the melting chamber of the vacuum induction melting furnace is further improved, the base 3 is formed into an "I" shape, the first sealed cavity 4 is arranged at the first horizontal position according to the stroke order, the second sealed cavity 6 is arranged at the second horizontal position, and the vertical position forms an intermediate visual path 5.

[0029] Preferably, the rotating window device of the melting chamber of the vacuum induction melting furnace is further improved, and the rotating observation disk 9 at the position of the middle visual path 5 can completely cover the fixed glass observation window 8. That is, in addition to the blocking of the gate valve 7, the blocking of the rotating observation disk 9 is also added, and the two blockings prevent the smelting material from splashing and dust from flying out and sticking to the fixed glass observation window 8.

[0030] Preferably, the rotating window device of the melting chamber of the vacuum induction melting furnace is further improved, the output shaft of the driving device 11 drives the rotating shaft 10 through the transmission gear set 9, and the rotating shaft 10 is inserted into the second sealed cavity 6 and meshed with the center hole of the rotating observation disk 9; The rotating shaft 10 and the base 3 form a shaft seal.

[0031] The present invention can at least achieve the following technical effects: 1) In order to prevent the smelting material from splashing and dust adhering to the inner side of the fixed glass observation window, which affects the observation line of sight, the present invention designs a closed visual path formed by the fixed glass observation window 8, the first sealed cavity 4, the rotating glass observation window 10, the intermediate visual path 5, the second sealed cavity 6 and the observation port for observing the interior of the melting chamber of the vacuum induction melting furnace.

[0032] Two layers of protection are formed on this visual path. The first layer is a gate valve that is closed at the beginning and when not observing. The second layer is a rotating observation disk 9 formed with multiple rotating glass observation windows 10. When the perspective of the rotating observation disk 9 is insufficient, it will be rotated and replaced to restore the perspective.

[0033] Accordingly, the above two layers of protection can greatly extend the service life of the observation equipment, thereby extending the maintenance and replacement cycle, extending the working cycle of the vacuum induction melting furnace, and thus improving production efficiency.

[0034] 2) The present invention designs two control schemes, sensor and timer, to control the rotation of the rotating observation disk 9 to update the rotating glass observation window 10, eliminating the defect of insufficient perspective of the observation window discovered by manual observation, which may occur after the production has started. Active early warning replacement of the perspective of the observation window is realized, which can ensure the availability of the observation window during production. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings of the present invention are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present invention, and to supplement the description in the specification. However, the drawings of the present invention are schematic diagrams not drawn to scale, and thus may not accurately reflect the precise structure or performance characteristics of any given embodiment, and the drawings of the present invention should not be interpreted as limiting or restricting the range of values ​​or properties covered by the exemplary embodiments of the present invention. The present invention is further described in detail below in conjunction with the drawings and specific embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0036] Figure 2 It is a side view schematic diagram of the present invention.

[0037] Figure 3 yes Figure 2 Schematic diagram of the cross-section at the AA position.

[0038] Description of reference numerals: Vacuum induction melting furnace melting chamber 1 Rotating window device for melting chamber of vacuum induction melting furnace 2 Base 3 First sealed cavity 4 Middle Vision 5 Second sealed cavity 6 Gate valve 7 Fixed glass observation window 8 Rotating viewing disc 9, Rotating glass observation window 10 Driving device 11. DETAILED DESCRIPTION

[0039] The following is an explanation of the embodiments of the present invention by specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the general design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments 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 here. 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 specific embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "coupled" to another element, the element can be directly connected or coupled to another element, or there can be an intermediate element. The difference is that when an element is referred to as "directly connected" or "directly coupled" to another element, there is no intermediate element. In all the drawings, the same reference numerals always represent the same elements.

[0040] First embodiment, reference Figure 1 Combination Figure 2 , Figure 3 As shown, the present invention provides a rotating window device for a melting chamber of a vacuum induction melting furnace, comprising: The base 3 is formed into a hollow sealed structure, which is formed with a first sealed cavity 4, an intermediate visual path 5 and a second sealed cavity 6 arranged in sequence from top to bottom, and is sealed and fixedly mounted on the observation port on the top wall of the melting chamber of the vacuum induction melting furnace; The gate valve 7 is inserted into the second sealed cavity 6 of the base 3 from one side, and can reciprocate in the second sealed cavity 6 to cover or expose the intermediate visual path 5 and the observation port while maintaining a sealed state; A fixed glass observation window 8, which forms the top wall of the base 3 above the first sealed cavity 4, is aligned with the intermediate visual path 5 and the observation port; A rotating observation disk 9 is arranged in the first sealed cavity 4 and is formed in a disk shape, on which a plurality of rotating glass observation windows 10 are evenly formed, which are adapted to the shapes and sizes of the fixed glass observation windows 8, the intermediate visual path 5 and the observation port; A driving device 11, which is fixed on the base 3 and is used to drive the rotating observation disk 9 to rotate so that a certain rotating glass observation window 10 is aligned with the fixed glass observation window 8; Among them, the rotating window device of the melting chamber of the vacuum induction melting furnace always remains in a sealed state, and the fixed glass observation window 8, the first sealed cavity 4, the rotating glass observation window 10, the intermediate visual path 5, the second sealed cavity 6 and the observation port jointly provide a visual path for observing the internal situation of the melting chamber of the vacuum induction melting furnace. The rotating glass observation window 10 that is not aligned with the fixed glass observation window 8 is accommodated in the first sealed cavity 4 without overlapping with the intermediate visual path 5.

[0041] Preferably, the gate valve covers the observation port at the initial stage and when not in observation mode.

[0042] In addition, it should also be understood that, although the terms "first", "second", etc. may be used here 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 an element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of exemplary embodiments of the present invention, the first element, component, region, layer or part discussed below may also be referred to as the second element, component, region, layer or part.

[0043] The second embodiment is an improvement on the first embodiment, and the same parts are not repeated here, and further includes: A sensor is arranged in the second sealed cavity 6 or outside the fixed glass observation window, and is used to detect the light transmittance of the rotating glass observation window 10 currently aligned with the fixed glass observation window 8. When the detected light transmittance is less than a specified threshold, it sends a signal to trigger the driving device 11 to drive the rotating observation disk 9 to rotate, so that the other rotating glass observation window 10 is aligned with the fixed glass observation window 8; Exemplarily, if the light transmittance is less than 70 percent, it is determined that the rotating glass observation window 10 needs to be replaced.

[0044] As a further improvement to the second embodiment, the sensor also receives the feedback stroke of the driving device 11, and sends out a replacement alarm signal if the rotating observation disk 9 completes the rotation of the specified angle.

[0045] The third embodiment is an improvement on the first embodiment, and the same parts are not repeated here, and further includes: The timer sends a signal to trigger the driving device 11 to drive the rotating observation disk 9 to rotate, so that another rotating glass observation window 10 is aligned with the fixed glass observation window 8.

[0046] In a further improvement to the third embodiment, when the timer reaches a specified duration, a replacement alarm signal is issued.

[0047] Preferably, when the first embodiment, the second embodiment and the third embodiment are in operation, the rotating observation disk 9 at the position of the intermediate visual path 5 can completely cover the fixed glass observation window 8 .

[0048] Preferably, in the first embodiment, the second embodiment and the third embodiment, the output shaft of the driving device 11 drives the rotating shaft 10 through the transmission gear set 9, and the rotating shaft 10 is inserted into the second sealed cavity 6 and meshes with the central hole of the rotating observation disk 9; The rotating shaft 10 and the base 3 form a shaft seal.

[0049] In a fourth embodiment, the present invention provides a feasible embodiment of a base, wherein the base 3 is formed into an "I" shape, and a first sealed cavity 4 is arranged at the first horizontal position according to the stroke order, a second sealed cavity 6 is arranged at the second horizontal position, and a middle visual path 5 is formed at the vertical position.

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It will also be understood that, unless expressly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not interpreted in an ideal or overly formal sense.

[0051] The present invention has been described in detail above through specific implementation modes and embodiments, 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 also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A rotating window device for a melting chamber of a vacuum induction melting furnace, characterized in that: include: A base (3) is formed with a first sealed cavity (4), an intermediate visual path (5) and a second sealed cavity (6) arranged in sequence from top to bottom, and is sealed and fixedly mounted on an observation port on the top wall of a smelting chamber of a vacuum induction smelting furnace; A gate valve (7) is inserted into the second sealed cavity (6) of the base (3) from one side, and can reciprocate in the second sealed cavity (6) to cover or expose the intermediate visual path (5) and the observation port while maintaining a sealed state; A fixed glass observation window (8) which forms the top wall of the base (3) above the first sealed cavity (4) and is aligned with the intermediate visual path (5) and the observation port; A rotating observation disk (9) is arranged in the first sealed cavity (4) and is in the shape of a disk, on which a plurality of rotating glass observation windows (10) are evenly formed, the shapes and sizes of which are adapted to the fixed glass observation window (8), the intermediate visual path (5) and the observation port; A driving device (11) is fixed on the base (3) and is used to drive the rotating observation disk (9) to rotate so that a certain rotating glass observation window (10) is aligned with the fixed glass observation window (8); The rotating window device of the melting chamber of the vacuum induction melting furnace always maintains a sealed state, and the fixed glass observation window (8), the first sealed cavity (4), the rotating glass observation window (10), the intermediate visual path (5), the second sealed cavity (6) and the observation port jointly provide a visual path for observing the internal conditions of the melting chamber of the vacuum induction melting furnace, and the rotating glass observation window (10) that is not aligned with the fixed glass observation window (8) is accommodated in the first sealed cavity (4) without overlapping with the intermediate visual path (5).

2. The rotating window device for a melting chamber of a vacuum induction melting furnace according to claim 1, characterized in that: During initialization and non-observation, the gate valve covers the observation port.

3. The rotating window device for the melting chamber of a vacuum induction melting furnace according to claim 1, characterized in that: Also includes: The sensor is arranged in the second sealed cavity (6) or outside the fixed glass observation window, and is used to detect the light transmittance of the rotating glass observation window (10) currently aligned with the fixed glass observation window (8). When the detected light transmittance is less than a specified threshold, the sensor sends a signal to trigger a driving device (11) to drive the rotating observation disk (9) to rotate, so that another rotating glass observation window (10) is aligned with the fixed glass observation window (8).

4. The rotating window device for the melting chamber of a vacuum induction melting furnace according to claim 3, characterized in that: Also includes: The sensor also receives the feedback stroke from the driving device (11), and sends out a replacement alarm signal if the rotating observation disk (9) completes the rotation of the specified angle.

5. The rotating window device for the melting chamber of a vacuum induction melting furnace according to claim 1, characterized in that: Also includes: The timer sends a signal to trigger the driving device (11) to drive the rotating observation disk (9) to rotate, so that another rotating glass observation window (10) is aligned with the fixed glass observation window (8).

6. The rotating window device for the melting chamber of a vacuum induction melting furnace according to claim 4, characterized in that: Also includes: When the timer reaches the specified time, a replacement alarm signal is issued.

7. The rotating window device for a melting chamber of a vacuum induction melting furnace according to claim 1, characterized in that: The base (3) is formed into an "I" shape, and the first sealed cavity (4) is arranged at the first horizontal position according to the stroke order, the second sealed cavity (6) is arranged at the second horizontal position, and the vertical position forms a middle visual path (5).

8. The rotating window device for a melting chamber of a vacuum induction melting furnace according to claim 1, characterized in that: The rotating observation disk (9) at the middle visual path (5) position can completely cover the fixed glass observation window (8).

9. The rotating window device for a melting chamber of a vacuum induction melting furnace according to claim 1, characterized in that: The output shaft of the driving device (11) drives the rotating shaft (10) through the transmission gear set (9), and the rotating shaft (10) is inserted into the second sealed cavity (6) and meshes with the central hole of the rotating observation disk (9); The rotating shaft (10) and the base (3) form a shaft seal.

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