Vacuum induction furnace smelting power switch assembly

Abstract

The utility model relates to special metallurgy field discloses a kind of vacuum induction furnace smelting power switch subassembly, comprising: frame, its upper part is formed with first bearing table, middle part is formed with second bearing table, and its lower part is formed as support part;First bearing table, its both sides are fixed first electrically connected part and second electrically connected part respectively, and first through-hole is formed in its center;Second bearing table, second through-hole is formed in its center;Transmission component, it can be in first through-hole and second through-hole upper movement, its upper end is connected electrically conductive part, its lower end is connected power source output shaft first end;Power source, it is fixed in second bearing table lower end surface, it can drive transmission component up and down movement;Electrically conductive part, it can be electrically connected or disconnected with first electrically connected part and second electrically connected part along with transmission component up and down movement.The utility model can be automated to complete on-off operation, can reduce equipment heating, simple structure, low in production cost.

Description

Technical Field

[0001] This utility model relates to the field of special metallurgy, and in particular to a power switch assembly for vacuum induction furnace melting. Background Technology

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

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

[0004] Furnace body: Provides a sealed vacuum environment and is typically made of materials that are resistant to 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: Composed of vacuum pump, vacuum gauge and valves, responsible for creating and maintaining a vacuum environment.

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

[0008] Electrical control system: monitors and controls temperature, vacuum level and input power.

[0009] The operating pressure of a vacuum induction melting furnace (VIM) is typically related to its design and operating conditions, referring to GB / T10069.35-2015 "Basic Technical Conditions for Electric Heating Devices Part 35: Medium Frequency Vacuum Induction Melting Furnaces". It is important to note that the operating pressure and operating conditions of the vacuum induction melting furnace must strictly adhere to relevant safety standards and operating procedures to ensure the safety of equipment and personnel. The vacuum level requirement of the vacuum induction melting furnace is a key factor in ensuring the smooth progress of the melting process and obtaining high-quality molten metal. According to JB / T 10551-2006 "Vacuum Technology - Vacuum Induction Melting Furnaces", the vacuum level of a vacuum induction melting furnace generally needs to reach and be maintained within a certain range to meet the melting requirements of different metallic materials.

[0010] The operating current range of the intermediate frequency power supply for small-scale experimental vacuum induction furnaces is 22.7A~31.8A. The operating current range of the intermediate frequency power supply for large-scale production vacuum induction furnaces is generally around 1000A. Such a large operating current places higher demands on the switching components. During the operation of the vacuum induction furnace, the intermediate frequency power supply needs to be frequently switched on and off, presenting the following shortcomings that need to be addressed:

[0011] 1. The existing switch components are not highly automated and require manual operation.

[0012] 2. Excessive operating current causes the equipment to overheat, reducing its lifespan. Utility Model Content

[0013] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section 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.

[0014] The technical problem this invention aims to solve is to provide a power switch assembly for controlling the on / off switching of power in a vacuum induction furnace, which can automatically complete the on / off operation and reduce equipment heating. The "large current" mentioned in this invention refers to a current of 1000A or higher.

[0015] To solve the above-mentioned technical problems, the present invention provides a vacuum induction furnace melting power switch assembly, comprising:

[0016] The frame has a first bearing platform on its upper part, a second bearing platform in its middle part, and a support part at its lower part.

[0017] The first support platform has a first electrical connection part and a second electrical connection part fixed on its two sides respectively, and a first through hole is formed in its center;

[0018] The second support platform has a second through hole formed in its center;

[0019] The transmission assembly has one end connected to an electrical conductive part and the other end connected to the first end of the power source output shaft;

[0020] The power source is fixed to the lower end face of the second support platform, which can drive the transmission components to move up and down;

[0021] The electrically conductive part can electrically connect or disconnect the first and second electrically connected parts as the transmission assembly moves up and down.

[0022] Preferably, the vacuum induction furnace melting power switch assembly is further improved by including:

[0023] A limiting component, which is arranged on the support, is used to limit the vertical output stroke of the power source.

[0024] Preferably, the vacuum induction furnace melting power switch assembly is further improved in that the contact portion between the electrically conductive part and the first electrically connected part forms a first contact surface, and the first electrically connected part forms a second contact surface at the position corresponding to the first contact surface.

[0025] A third contact surface is formed at the contact point between the electrical conductive part and the second electrical connection part, and a fourth contact surface is formed at the position of the second electrical connection part corresponding to the third contact surface. The surface contact can increase the current flow area and thus reduce the heat generation of the equipment.

[0026] Preferably, the vacuum induction furnace melting power switch assembly is further improved, and the transmission assembly includes:

[0027] The connecting rod, made of insulating material, passes through the guide block, with its upper end connected to the electrical conductive part and its lower end connected to the first end of the power source output shaft;

[0028] A resilient reset element is fitted onto the connecting rod;

[0029] A guide block is formed between the first and second support platforms.

[0030] Preferably, the vacuum induction furnace melting power switch assembly is further improved, and the limiting component includes:

[0031] The limit plate has its first end fixed to the second end of the power source output shaft. It moves up and down with the power source output shaft, and its second end is inserted between the upper limit switch and the lower limit switch.

[0032] The upper limit switch and the lower limit switch are vertically arranged on the support.

[0033] The upper limit switch can trigger the power source to start output;

[0034] The lower limit switch can trigger the power source to stop outputting power.

[0035] It should be noted that the upper limit switch only limits the maximum upward movement of the electrically conductive part, and the lower limit switch only limits the maximum downward movement of the electrically conductive part. During use, the power source stroke can be controlled by an external electrical signal to start and stop at the required position.

[0036] Preferably, the power switch assembly for the vacuum induction furnace melting is further improved, and the power source is a cylinder.

[0037] Preferably, the vacuum induction furnace melting power switch assembly is further improved, with cooling water channels provided in the first electrical connection part and the second electrical connection part.

[0038] The working principle of this utility model is as follows;

[0039] When this invention performs an electrical conduction operation, the first electrical connection part and the second electrical connection part are respectively connected to the two ends of the cable. The power source output shaft moves downward, driving the transmission assembly to move downward and stretch the elastic reset member until the limit plate triggers the lower limit switch, and the cylinder stops moving. At this time, the electrical conduction part forms an electrically conductive surface contact with the first electrical connection part and the second electrical connection part.

[0040] When this utility model performs an electrical disconnection operation, the cylinder is de-aired, and the stretched elastic reset member is reset under the action of elastic force, driving the transmission assembly to move upward, so that the electrical conduction part is disengaged from the first electrical connection part and the second electrical connection part, thus disconnecting the electricity.

[0041] This utility model can achieve at least the following technical effects;

[0042] 1. This utility model does not require manual operation; it achieves automated control by using a cylinder to realize electrical conduction and disconnection.

[0043] 2. This utility model forms a stable and reliable electrical connection through the cylinder and the contact surface.

[0044] 3. This utility model is easy to operate and has a long service life. After being tested for 1,000 cycles of switching on and off, it still works normally without arcing.

[0045] 4. This utility model uses an elastic reset member to reset the electrically conductive part after the cylinder is cut off, so that the electrical conductive part is disconnected from the first electrical connection part and the second electrical connection part. The structure is simple and the manufacturing cost is low. Attached Figure Description

[0046] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, the accompanying drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The accompanying drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0047] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0048] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0049] Explanation of reference numerals in the attached figures:

[0050] Framework 1;

[0051] First support platform 2;

[0052] Second support platform 3;

[0053] Support part 4;

[0054] First electrical connection part 5;

[0055] Second electrical connection part 6;

[0056] Power Source 7;

[0057] Electrically conductive part 8;

[0058] Linkage 9.1;

[0059] 9.2 Elastic reset element;

[0060] Guide block 9.3;

[0061] Limit plate 10.1;

[0062] Upper limit switch 10.2;

[0063] Lower limit switch 10.3. Detailed Implementation

[0064] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model 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 "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.

[0065] First embodiment;

[0066] refer to Figure 1 Combination Figure 2 As shown, this utility model provides a power switch assembly for vacuum induction furnace melting, comprising:

[0067] The frame 1 has a first support platform 2 formed on its upper part, a second support platform 3 formed in its middle part, and a support part 4 formed at its lower part;

[0068] The first support platform 2 has a first electrical connection part 5 and a second electrical connection part 6 fixed on its two sides respectively, and a first through hole is formed in its center;

[0069] The second support platform 3 has a second through hole formed in its center;

[0070] The transmission assembly is movable in the first through hole and the second through hole, with its upper end connected to the electrical conductive part 8 and its lower end connected to the first end of the output shaft of the power source 7.

[0071] Power source 7, in this embodiment, is a cylinder, which is fixed to the lower end face of the second support platform 3 and can drive the transmission component to move up and down.

[0072] The electrically conductive part 8 can electrically connect or disconnect the first electrically connected part 5 and the second electrically connected part 6 as the transmission assembly moves up and down.

[0073] Second embodiment;

[0074] This utility model provides a power switch assembly for vacuum induction furnace melting, which is an improvement on the first embodiment described above. The identical parts will not be repeated here, and it also includes:

[0075] A limiting component, arranged on the support 4, is used to limit the vertical output stroke of the power source 7. (Continue to refer to...) Figure 1 Combination Figure 2 As shown, the limiting component includes:

[0076] The limiting plate 10.1 has its first end fixed to the second end of the output shaft of the power source 7, and moves up and down with the output shaft of the power source 7. Its second end is inserted between the upper limit switch 10.2 and the lower limit switch 10.3.

[0077] The upper limit switch 10.2 and the lower limit switch 10.3 are vertically arranged on the support part 4;

[0078] The upper limit switch 10.2 can trigger the power source 7 to start output;

[0079] The lower limit switch 10.3 can trigger the power source 7 to stop output;

[0080] The electrically conductive part 8 and the first electrically connected part 5 have a first contact surface at the contact point, and the first electrically connected part 5 has a second contact surface at the position corresponding to the first contact surface.

[0081] A third contact surface is formed at the contact point between the electrical conductive part 8 and the second electrical connection part 6, and a fourth contact surface is formed at the position of the second electrical connection part 6 corresponding to the third contact surface.

[0082] For example, the cross-section of the electrical conductive part 8 is formed as an inverted trapezoid.

[0083] Third embodiment;

[0084] Continue to refer to Figure 1 Combination Figure 2 As shown, this is an improvement based on the first or second embodiment described above. The identical parts will not be repeated. The transmission assembly includes:

[0085] The connecting rod 9.1 is made of insulating material, with its upper end connected to the electrical conductive part 8 and its lower end connected to the first end of the output shaft of the power source 7;

[0086] The elastic reset component 9.2, in this embodiment, is a reset spring, which is mounted on the connecting rod 9.1;

[0087] Guide block 9.3 is formed between the first support platform 2 and the second support platform 3.

[0088] Alternatively, the first to third embodiments described above can be further improved by providing cooling water channels for the first electrical connection portion 5 and the second electrical connection portion 6. The form of the cooling water channels is not limited and can be any of the existing technologies to enhance heat dissipation and avoid high temperatures in the switching components caused by large currents.

[0089] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless explicitly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0090] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A power switch assembly for vacuum induction furnace melting, characterized in that, include: The frame (1) has a first bearing platform (2) formed on its upper part, a second bearing platform (3) formed in its middle part, and a support part (4) formed at its lower part. The first support platform (2) has a first electrical connection part (5) and a second electrical connection part (6) fixed on its two sides respectively, and a first through hole is formed in its center; The second support platform (3) has a second through hole formed in its center; The transmission assembly can move in the first through hole and the second through hole, and its upper end is connected to the electrical conduction part (8), and its lower end is connected to the first end of the output shaft of the power source (7); The power source (7) is fixed on the lower end face of the second bearing platform (3) and can drive the transmission assembly to move up and down. The electrically conductive part (8) can electrically connect or disconnect the first electrically connected part (5) and the second electrically connected part (6) as the transmission assembly moves up and down.

2. The vacuum induction furnace melting power switch assembly as described in claim 1, characterized in that, Also includes: A limiting component is arranged on the support (4) to limit the vertical output stroke of the power source (7).

3. The vacuum induction furnace melting power switch assembly as described in claim 1, characterized in that: A first contact surface is formed at the contact point between the electrically conductive part (8) and the first electrically connected part (5), and a second contact surface is formed at the position of the first electrically connected part (5) corresponding to the first contact surface; A third contact surface is formed at the contact point between the electrical conductive part (8) and the second electrical connection part (6), and a fourth contact surface is formed at the position of the second electrical connection part (6) corresponding to the third contact surface.

4. The vacuum induction furnace melting power switch assembly as described in claim 1, characterized in that, The transmission components include: The connecting rod (9.1), which is made of insulating material, passes through the guide block (9.3), its upper end is connected to the electrical conduction part (8), and its lower end is connected to the first end of the output shaft of the power source (7); The elastic reset element (9.2) is fitted onto the connecting rod (9.1); The guide block (9.3) is formed between the first support platform (2) and the second support platform (3).

5. The vacuum induction furnace melting power switch assembly as described in claim 2, characterized in that, The limit components include: The limit plate (10.1) has its first end fixed to the second end of the output shaft of the power source (7), and moves up and down with the output shaft of the power source (7). Its second end is inserted between the upper limit switch (10.2) and the lower limit switch (10.3). The upper limit switch (10.2) and the lower limit switch (10.3) are vertically arranged on the support (4); The upper limit switch (10.2) can trigger the power source (7) to start output; The lower limit switch (10.3) can trigger the power source (7) to stop output.

6. The vacuum induction furnace melting power switch assembly as described in claim 1, characterized in that: The power source (7) is the cylinder.

7. The vacuum induction furnace melting power switch assembly as described in claim 1, characterized in that: The first electrical connection part (5) and the second electrical connection part (6) are provided with cooling water channels.

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