Vacuum induction melting furnace cavity sealing door

Abstract

The utility model relates to the field of special metallurgy, and discloses a vacuum induction melting furnace cavity sealing door which is characterized in that a sealing door plate covers a vacuum induction melting furnace opening; the at least one locking device is fixed in the cavity of the vacuum induction melting furnace and is used for pulling the sealing door plate to the side wall of the cavity of the vacuum induction melting furnace to seal the furnace mouth; the connecting pieces are formed on the side, facing the vacuum induction melting furnace cavity, of the sealing door plate, and the number of the connecting pieces corresponds to that of the locking devices. According to the locking device, a locking block is fixedly connected to the end face of a first output shaft of the differential hydraulic cylinder and can be rotationally locked after being inserted into a connecting piece; a guide protrusion is formed on the side wall of a second output shaft of the differential hydraulic cylinder, the end face of the side where the second output shaft is located is fixedly connected with a rotary guide piece, and the second output shaft can be inserted into the rotary guide piece. The sealing device is simple in structure, few in parts and small in occupied space, the production cost of the vacuum induction melting furnace is reduced, and meanwhile, the sealing effect in the prior art can be achieved or even exceeded.

Description

Technical Field

[0001] The utility model relates to the field of special metallurgy, in particular to a vacuum induction melting furnace cavity sealing door. 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;

[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 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.

[0010] The vacuum induction melting furnace cavity needs to be connected to the outside world through the vacuum induction melting furnace port, which is used to deliver raw materials or additives into the vacuum induction melting furnace cavity through the vacuum induction melting furnace port. In order to avoid destroying the vacuum environment in the vacuum induction melting furnace cavity, the vacuum induction melting furnace port requires strict sealing.

[0011] In the prior art, the vacuum induction melting furnace mouth is pressed by tightening a hydraulic cylinder to press the sealing door against the vacuum induction melting furnace mouth, and then the sealing effect is ensured by a sealing strip. This solution has a complex structure, many parts, and occupies a large space, which is not conducive to implementation. Utility Model Content

[0012] A series of simplified concepts are introduced in the utility model content section, which are all simplifications of the prior art in the field, which will be further described in detail in the specific implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and necessary technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0013] The technical problem to be solved by the utility model is to provide a vacuum induction melting furnace cavity sealing door with a simple structure and small occupied space.

[0014] In order to solve the above technical problems, the utility model provides a vacuum induction melting furnace cavity sealing door, comprising:

[0015] A sealing door panel, the cover of which is installed at the mouth of the vacuum induction melting furnace;

[0016] At least one locking device, which is fixed in the vacuum induction melting furnace cavity and is used to pull the sealing door panel toward the side wall of the vacuum induction melting furnace cavity to seal the furnace opening; it should be noted that the number of locking devices is selected according to actual needs, and can be one, two, three or four;

[0017] Connectors, which are formed on one side of the sealing door panel facing the inside of the vacuum induction melting furnace cavity, and the number of connectors corresponds to the number of locking devices;

[0018] Locking device, comprising:

[0019] A locking block, which is fixedly connected to the end surface of the first output shaft of the differential hydraulic cylinder and can be inserted into the connecting piece and then rotated and locked;

[0020] The differential hydraulic cylinder has a guide protrusion formed on the side wall of its second output shaft, and the end surface on the side where the second output shaft is located is fixedly connected to the rotary guide member, and the second output shaft can be inserted into the rotary guide member;

[0021] Principle of differential hydraulic cylinder: Both ends are connected to the oil supply pipeline at the same time. Since the piston rod action area at one end is smaller than that at the other end, the differential principle is used to realize the reciprocating motion of the piston rod extending at one end and retracting at the other end.

[0022] During operation, the second output shaft of the differential hydraulic cylinder extends, the guide protrusion rotates and extends along the rotating guide member, the first output shaft of the differential hydraulic cylinder rotates and retracts to drive the locking block to rotate and retract, and the sealing door plate is pulled to seal the furnace mouth of the vacuum induction melting.

[0023] Preferably, the vacuum induction melting furnace cavity sealing door is further improved, and the locking block is formed into a rectangular parallelepiped;

[0024] The height of the cuboid is less than one tenth of the length and width of the cuboid, that is, a flat cuboid is formed. This design facilitates locking after passing through the connecting piece.

[0025] Preferably, the vacuum induction melting furnace cavity sealing door is further improved, and the locking block is formed with a chamfer to avoid rigid contact when the connecting piece is inserted.

[0026] Preferably, the vacuum induction melting furnace cavity sealing door is further improved, and the connecting piece is formed as a connecting plate with an open strip-shaped through hole;

[0027] The width of the open strip-shaped through hole is smaller than the length of the cuboid.

[0028] Preferably, the vacuum induction melting furnace cavity sealing door is further improved, the open strip-shaped through hole is arranged horizontally, and the axial direction of the first output shaft of the differential hydraulic cylinder is arranged horizontally and faces the open strip-shaped through hole.

[0029] It should be noted that the groove direction, i.e. the opening direction, of the open strip-shaped through hole can be arbitrary, as long as the angle of the locking block when inserted into the open strip-shaped through hole is controlled. From a practical operation perspective, the open strip-shaped through hole is horizontally arranged, and the axial direction of the first output shaft of the differential hydraulic cylinder is horizontally arranged and facing the open strip-shaped through hole, which is easier to control and align.

[0030] Preferably, the vacuum induction melting furnace chamber sealing door is further improved, and the guide protrusion is a cylindrical protrusion formed on the side wall of the second output shaft of the differential hydraulic cylinder.

[0031] Preferably, the vacuum induction melting furnace cavity sealing door is further improved, and the rotating guide is formed as a hollow cylinder with a bottom wall;

[0032] A spiral guide groove is formed on the side wall of the cylinder, and the guide protrusion can move in the spiral guide groove.

[0033] Preferably, the vacuum induction melting furnace cavity sealing door is further improved, and a lubricating layer is formed between the guide protrusion and the spiral guide groove. For example, the lubricating layer is formed by grease. The lubricating layer can avoid jamming between the guide protrusion and the spiral guide groove, so that the equipment moves smoothly.

[0034] Compared with the prior art, the utility model has a simple structure, fewer parts, small space occupation, simple operation, and is very suitable for the vacuum induction melting furnace cavity. While reducing the production cost of the vacuum induction melting furnace, the utility model can at least achieve or even exceed the sealing effect of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0036] Figure 1 This utility model is used as a reference Figure 1 , which shows that the locking block passes through the connecting piece but is not locked.

[0037] Figure 2 This utility model is used as a reference Figure 2 , which shows the locking state of the locking block inserted into the connecting piece.

[0038] Figure 3 It is a reference for the use status of the locking device of this utility model. Figure 1 , which shows that the first output shaft of the differential hydraulic cylinder is extended and the second output shaft of the differential hydraulic cylinder is retracted.

[0039] Figure 4 It is a reference for the use status of the locking device of this utility model. Figure 2 , which shows that the first output shaft of the differential hydraulic cylinder is retracted and the second output shaft of the differential hydraulic cylinder is extended.

[0040] Figure 5 yes Figure 1 Schematic diagram of the matching state of the locking block and the open strip-shaped through hole from a medium AA perspective.

[0041] Figure 6 yes Figure 2 Schematic diagram of the matching state of the locking block and the open strip-shaped through hole from the middle BB perspective.

[0042] Description of reference numerals:

[0043] Sealing door panel 1;

[0044] Locking device 2;

[0045] Connector 3;

[0046] Open strip-shaped through hole 3.1;

[0047] Locking block 4;

[0048] Differential hydraulic cylinder 5;

[0049] First output shaft 5.1;

[0050] Second output shaft 5.2;

[0051] Guide convex 5.3;

[0052] Rotating guide 6;

[0053] Spiral guide groove 6.1. DETAILED DESCRIPTION

[0054] The following is an explanation of the implementation of the utility model by specific specific embodiments, and those skilled in the art can fully understand the other advantages and technical effects of the utility model from the content disclosed in this specification. The utility model 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 utility model. 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 utility model 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 utility model 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 element.

[0055] First embodiment, reference Figure 1 Combination Figure 2 As shown, the utility model provides a vacuum induction melting furnace cavity sealing door, comprising:

[0056] A sealing door panel 1, the cover of which is mounted on the opening of the vacuum induction melting furnace;

[0057] At least one locking device 2 is fixed in the cavity of the vacuum induction melting furnace, and is used to pull the sealing door panel 1 toward the side wall of the cavity of the vacuum induction melting furnace to seal the furnace opening; when the number of the locking device 2 is one, it can be arranged at the geometric center of the sealing door panel 1; when the number of the locking device 2 is two, it can be arranged symmetrically near the upper and lower door edges of the sealing door panel 1 or symmetrically near the left and right door edges; when the number of the locking device 2 is three, it can be arranged in an equilateral triangle around the geometric center groove of the sealing door panel 1 and the distance between each other is as large as possible; when the number of the locking device 2 is four, it can be arranged at the four corners of the sealing door panel 1;

[0058] The connecting piece 3 is formed on the side of the sealing door panel 1 facing the inside of the vacuum induction melting furnace, and the number of the connecting piece 3 corresponds to the number of the locking devices 2;

[0059] refer to Figure 3 and Figure 4 As shown, the locking device 2 comprises:

[0060] The locking block 4 is fixedly connected to the end surface of the first output shaft 5.1 of the differential hydraulic cylinder 5, and can be inserted into the connecting piece 3 and then rotated and locked;

[0061] The differential hydraulic cylinder 5 has a guide protrusion 5.3 formed on the side wall of its second output shaft 5.2, and the end surface of the second output shaft 5.2 is fixedly connected to the rotary guide member 6, and the second output shaft 5.2 can be inserted into the rotary guide member 6;

[0062] During operation, the second output shaft 5.2 of the differential hydraulic cylinder 5 extends, the guide protrusion 5.3 rotates and extends along the rotating guide member 6, the first output shaft 5.1 of the differential hydraulic cylinder 5 rotates and retracts to drive the locking block 4 to rotate and retract, and pulls the sealing door panel 1 to seal at the furnace mouth of the vacuum induction melting furnace.

[0063] In addition, it should be understood that, although the terms "first", "second", etc. can 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 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 utility model, the first element, component, region, layer or part discussed below may also be referred to as the second element, component, region, layer or part.

[0064] The second embodiment is a further improvement on the above first embodiment. The same parts are not repeated here. This embodiment provides a preferred implementation method in which the connecting member 3, the locking block 4, the guide protrusion 5.3 and the rotating guide member 6 cooperate with each other. Figure 3 and Figure 4 shown.

[0065] The locking block 4 is formed into a rectangular parallelepiped, the height of the rectangular parallelepiped is less than one tenth of the length and width of the rectangular parallelepiped, and the locking block 4 is formed with a chamfer.

[0066] The connecting member 3 is formed as a connecting plate with an open strip-shaped through hole 3.1, the width of which is smaller than the length of the cuboid. Preferably, the open strip-shaped through hole 3.1 is arranged horizontally, and the axial direction of the first output shaft 5.1 of the differential hydraulic cylinder 5 is arranged horizontally and faces the open strip-shaped through hole 3.1.

[0067] The guide protrusion 5.3 is a cylindrical protrusion formed on the side wall of the second output shaft 5.2 of the differential hydraulic cylinder 5;

[0068] The rotary guide 6 is formed as a hollow cylinder having a bottom wall;

[0069] A spiral guide groove 6.1 is formed on the side wall of the cylinder, and the guide protrusion 5.3 can move in the spiral guide groove 6.1. Preferably, a lubricating layer is formed between the guide protrusion 5.3 and the spiral guide groove 6.1.

[0070] Based on the above second embodiment, the working process of the utility model is further described as follows;

[0071] Initially, the second output shaft 5.2 of the differential hydraulic cylinder 5 is extended to the maximum position, the guide protrusion 5.3 is located at the farthest end of the spiral guide groove 6.1, the first output shaft 5.1 of the differential hydraulic cylinder 5 is at the minimum position, and the locking block 4 is located at the position closest to the differential hydraulic cylinder 5.

[0072] When the vacuum induction melting furnace cavity sealing door is closed, the differential hydraulic cylinder 5 starts to move forward, the second output shaft 5.2 of the differential hydraulic cylinder 5 gradually retracts, and the first output shaft 5.1 of the differential hydraulic cylinder 5 gradually extends. In this process, the guide protrusion 5.3 rotates along the spiral guide groove 6.1, thereby driving the locking block 4 to extend and rotate at the same time. Figure 5 shown.

[0073] When the locking block 4 reaches the connecting piece 3, it passes through the open strip-shaped through hole 3.1. Then, the differential hydraulic cylinder 5 starts to move in the reverse direction. The second output shaft 5.2 of the differential hydraulic cylinder 5 gradually extends, and the first output shaft 5.1 of the differential hydraulic cylinder 5 gradually retracts. In this process, the guide protrusion 5.3 rotates along the spiral guide groove 6.1, thereby driving the locking block 4 to retract and rotate at the same time. The locking block 4 is blocked by the open strip-shaped through hole 3.1 and cannot pass through, thereby pulling the sealing door, so that the sealing door seals the vacuum induction melting furnace mouth, refer to Figure 6 shown.

[0074] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. It will also be understood that, unless explicitly 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 field, and not interpreted in an ideal or overly formal sense.

[0075] The present invention is described in detail above through specific implementation methods and examples, but these do not constitute limitations of the present invention. Without departing from the principle of the present invention, those skilled in the art may make many modifications and improvements, which should also be considered as the protection scope of the present invention.

Claims

1. A vacuum induction melting furnace cavity sealing door, characterized in that: include: A sealing door plate (1), the cover of which is mounted on the opening of the vacuum induction melting furnace; At least one locking device (2) is fixed in the cavity of the vacuum induction melting furnace and is used to pull the sealing door panel (1) toward the side wall of the cavity of the vacuum induction melting furnace to seal the furnace opening; Connecting pieces (3), formed on a side of the sealing door plate (1) facing the interior of the vacuum induction melting furnace, and the number of connecting pieces (3) corresponds one to one to the number of locking devices (2); The locking device (2) comprises: A locking block (4) which is fixedly connected to the end surface of the first output shaft (5.1) of the differential hydraulic cylinder (5) and can be inserted into the connecting piece (3) and then rotated and locked; A differential hydraulic cylinder (5), wherein a side wall of the second output shaft (5.2) is formed with a guide protrusion (5.3), an end surface of a side where the second output shaft (5.2) is located is fixedly connected to a rotary guide member (6), and the second output shaft (5.2) can be inserted into the rotary guide member (6); During operation, the second output shaft (5.2) of the differential hydraulic cylinder (5) extends, the guide protrusion (5.3) rotates and extends along the rotating guide member (6), and the first output shaft (5.1) of the differential hydraulic cylinder (5) rotates and retracts, driving the locking block (4) to rotate and retract, thereby pulling the sealing door panel (1) to seal the furnace mouth of the vacuum induction melting furnace.

2. The vacuum induction melting furnace chamber sealing door according to claim 1, characterized in that: The locking block (4) is formed into a rectangular parallelepiped; The height of the cuboid is less than one tenth of the length and width of the cuboid.

3. The vacuum induction melting furnace chamber sealing door according to claim 1, characterized in that: The locking block (4) is formed with a chamfer.

4. The vacuum induction melting furnace chamber sealing door according to claim 3, characterized in that: The connecting piece (3) is formed as a connecting plate having an open strip-shaped through hole (3.1); The width of the open strip-shaped through hole (3.1) is smaller than the length of the cuboid.

5. The vacuum induction melting furnace cavity sealing door according to claim 4, characterized in that: The open strip-shaped through hole (3.1) is arranged horizontally, and the axial direction of the first output shaft (5.1) of the differential hydraulic cylinder (5) is arranged horizontally and faces the open strip-shaped through hole (3.1).

6. The vacuum induction melting furnace chamber sealing door according to claim 1, characterized in that: The guide protrusion (5.3) is a cylindrical protrusion formed on the side wall of the second output shaft (5.2) of the differential hydraulic cylinder (5).

7. The vacuum induction melting furnace chamber sealing door according to claim 6, characterized in that: The rotary guide member (6) is formed as a hollow cylinder having a bottom wall; A spiral guide groove (6.1) is formed on the side wall of the cylinder, and the guide protrusion (5.3) can move in the spiral guide groove (6.1).

8. The vacuum induction melting furnace chamber sealing door according to claim 7, characterized in that: A lubricating layer is formed between the guide protrusion (5.3) and the spiral guide groove (6.1).

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