Vacuum furnace observation hole lens online replacement device and vacuum furnace

Abstract

The invention relates to the technical field of vacuum furnace design, in particular to a vacuum furnace observation hole lens online replacement device and a vacuum furnace. The invention provides a vacuum furnace observation hole lens on-line replacing device which comprises a lens mounting part, a vacuum cutting-off part and a peephole connecting part, one side of the peephole connecting part is connected with a peephole of a vacuum furnace, and the other opposite side of the peephole connecting part is connected with the lens mounting part through the vacuum cutting-off part. The lens mounting part is provided with a first closed space, the peephole connecting part is provided with a second closed space, the second closed space is communicated with the interior of the vacuum furnace, and the vacuum cut-off part is used for isolating or communicating the first closed space and the second closed space. According to the technical scheme, the observation hole lens can be replaced in the vacuum smelting state, unnecessary shutdown is avoided, continuous production of the vacuum induction smelting furnace is guaranteed, and the production efficiency and the equipment utilization rate are remarkably improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vacuum furnace design, and particularly to an on-line replacement device for the observation hole lens of a vacuum furnace and a vacuum furnace. Background Art

[0002] During the use of a vacuum induction melting furnace, the observation hole lens plays a crucial role. Through the observation hole lens, operators can directly observe the situation inside the furnace to obtain information about the furnace. However, during continuous steelmaking production, after the metal raw materials are heated and melted over time, some residual scraps will adhere to the inner wall of the cavity of the vacuum induction melting furnace and the position of the observation hole, resulting in the inability to directly observe the specific smelting situation inside the vacuum chamber during continuous smelting. It is necessary to break the vacuum environment of the vacuum chamber to replace the observation hole lens, which cannot ensure the continuous production of the vacuum induction melting furnace, is not conducive to improving the purity of the smelted products, and at the same time, the service life of the crucible will be greatly reduced under the repeated switching between the atmospheric state and the vacuum state. Therefore, the working method of on-line replacing the observation hole lens becomes particularly important. Summary of the Invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, in the first aspect of the present disclosure, there is provided an on-line replacement device for the observation hole lens of a vacuum furnace, which is characterized by including a lens mounting part, a vacuum cut-off part, and a viewing hole connecting part. One side of the viewing hole connecting part is connected to the viewing hole of the vacuum furnace, and the opposite side is connected to the lens mounting part through the vacuum cut-off part, wherein,

[0005] The lens mounting part has a first sealed space, the viewing hole connecting part has a second sealed space, the second sealed space is communicated with the inside of the vacuum furnace, and the vacuum cut-off part is used to isolate or communicate the first sealed space from the second sealed space.

[0006] In a feasible implementation manner, the lens mounting part includes a mounting part body and a lens mounting position. The mounting part body is provided with a mounting part through hole along the direction of the viewing hole. The lens mounting position is arranged on the side of the mounting part through hole away from the viewing hole. The observation hole lens is arranged at the lens mounting position, and the mounting part hole passage between the observation hole lens and the vacuum cut-off part forms the first sealed space.

[0007] In a feasible implementation manner, the observation hole lens is connected to the lens mounting position through a first sealing ring.

[0008] In a feasible implementation, an installation part cover plate is further provided on the lens installation part. The installation part cover plate includes a cover plate body and an observation hole flange. The lens installation position is arranged on the cover plate body. The cover plate body is detachably covered on the installation part body. The observation hole flange is used to fix the observation hole lens at the lens installation position.

[0009] In a feasible implementation, the cover plate body is covered on the observation hole lens through a second sealing ring.

[0010] In a feasible implementation, a fixing member is further provided on the installation part cover plate. One end of the cover plate body is hinged to the installation part body. The fixing member is used to fix the relative positions of the cover plate body and the installation part body.

[0011] In a feasible implementation, the vacuum cut-off part is arranged as an ultra-high vacuum gate valve.

[0012] In a feasible implementation, the vacuum cut-off part further includes a vacuum relief pipeline. The vacuum relief pipeline includes a first pipeline and a second pipeline. The first pipeline communicates with the first sealed space. One end of the second pipeline communicates with the second sealed pipeline, and the opposite end communicates with the first pipeline. Among them,

[0013] A first stop valve is arranged on the first pipeline. A second stop valve is arranged on the second pipeline. And the connection part of the second pipeline and the first pipeline is arranged between the first stop valve and the first sealed space.

[0014] In a feasible implementation, the first stop valve and the second stop valve are arranged as ball valves.

[0015] In the second aspect of the present disclosure, a vacuum furnace is provided, including the above-mentioned on-line replacement device for the observation hole lens of the vacuum furnace.

[0016] Compared with the prior art, the present disclosure at least includes the following beneficial effects: The vacuum cut-off part of the present disclosure can cut off the communication between the first sealed space and the second sealed space. By breaking the vacuum in the first sealed space to replace the observation hole lens, the vacuum furnace can replace the observation hole lens under the vacuum smelting state, reducing unnecessary downtime caused by lens damage, not affecting the continuous production of the vacuum induction melting furnace, significantly improving the production efficiency and equipment utilization rate, improving the product quality of the smelting materials to a certain extent, and ensuring the stability of vacuum smelting. Description of the Drawings

[0017] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments conforming to the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] By reading the following detailed description of the exemplary embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the exemplary embodiments and are not considered as a limitation to this application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0020] Figure 1 is a schematic cross-sectional structure diagram of the whole of the present disclosure;

[0021] Figure 2 is a schematic structure diagram of the lens mounting part, the peephole connection part and the vacuum evacuation pipeline of the present disclosure;

[0022] Figure 3 is a schematic structure diagram of the vacuum cut-off part of the present disclosure.

[0023] Among them, Figures 1 to 3 the corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0024] 100 - observation hole lens;

[0025] 1 - lens mounting part; 11 - first sealed space; 12 - mounting part body; 13 - lens mounting position; 14 - mounting part cover; 141 - cover body; 142 - observation hole flange; 143 - fixing part; 2 - vacuum cut-off part; 3 - peephole connection part; 31 - second sealed space; 4 - first sealing ring; 5 - second sealing ring; 6 - first pipeline; 61 - first stop valve 61; 7 - second pipeline; 71 - second stop valve. Detailed Embodiments

[0026] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the following will further describe the solutions of the present disclosure. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0027] In the following description, many specific details are set forth to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0028] At present, during the use of a vacuum induction melting furnace, the viewing hole lens plays a crucial role. Through the viewing hole lens, operators can directly observe the situation inside the furnace to obtain information about the inside of the furnace. However, during continuous steelmaking production, after the metal raw materials are heated and melted over time, there will be some residual scraps adhering to the inner wall of the cavity of the vacuum induction melting furnace and the position of the viewing hole, resulting in the inability to directly observe the specific smelting situation inside the vacuum chamber during continuous smelting. It is necessary to break the vacuum environment of the vacuum chamber to replace the viewing hole lens, which cannot ensure the continuous production of the vacuum induction melting furnace, is not conducive to improving the purity of the smelted products, and at the same time, the service life of the crucible will be greatly reduced under the repeated switching between the atmospheric state and the vacuum state. Therefore, the working method of online replacement of the viewing hole lens becomes particularly important.

[0029] Based on this, the embodiments of the present disclosure provide an online replacement device for the viewing hole lens of a vacuum furnace. The vacuum cut-off part of the present disclosure can cut off the connection between the first sealed space and the second sealed space, and replace the viewing hole lens by breaking the vacuum in the first sealed space, so that the vacuum furnace can replace the viewing hole lens in the vacuum smelting state, reduce unnecessary downtime caused by lens damage, do not affect the continuous production of the vacuum induction melting furnace, significantly improve production efficiency and equipment utilization rate, improve the product quality of smelting materials to a certain extent, and ensure the stability of vacuum smelting.

[0030] The following will detail the online replacement device for the viewing hole lens of the vacuum furnace through specific embodiments:

[0031] Refer to Figures 1 to 3 As shown, in the first aspect of the present disclosure, an online replacement device for the viewing hole lens of a vacuum furnace is provided, including a lens mounting part 1, a vacuum cut-off part 2, and a viewing hole connection part 3. One side of the viewing hole connection part 3 is connected to the viewing hole of the vacuum furnace, and the opposite side is connected to the lens mounting part 1 through the vacuum cut-off part 2. Among them, the lens mounting part 1 has a first sealed space 11, the viewing hole connection part 3 has a second sealed space 31, the second sealed space 31 is connected to the inside of the vacuum furnace, and the vacuum cut-off part 2 is used to isolate or connect the first sealed space 11 and the second sealed space 31.

[0032] The vacuum cut-off part 2 of the present disclosure can cut off the connection between the first sealed space 11 and the second sealed space 31, and replace the viewing hole lens 100 by breaking the vacuum in the first sealed space 11, so that the vacuum furnace can replace the viewing hole lens in the vacuum smelting state, reduce unnecessary downtime caused by lens damage, do not affect the continuous production of the vacuum induction melting furnace, significantly improve production efficiency and equipment utilization rate, improve the product quality of smelting materials to a certain extent, and ensure the stability of vacuum smelting.

[0033] During the production process, the vacuum cut-off part 2 is closed. At this time, the second sealed space 31 is in a vacuum state, and the first sealed space 11 is in a state of waiting to break the vacuum. The way to break the vacuum can be achieved by opening the first sealed space 11. For example, a bleed port is provided on the lens mounting part 1, and opening the bleed port allows external air to enter the first sealed space 11 to break the vacuum state. At this moment, the first sealed space 11 is in a non-vacuum state, which does not affect the normal smelting of the smelting chamber where the furnace body is located. It should be noted that breaking the vacuum state of the first sealed space 11 aims to be able to successfully disassemble the viewing hole lens 100 because the inside of the first sealed space 11 is under negative pressure in the vacuum state, and the viewing hole lens 100 located on the lens mounting part 1 will be tightly adsorbed. Further, after replacing the viewing hole lens 100, continue to open the ultra-high vacuum gate valve, and production can be resumed, making the first sealed space 11 communicate with the second sealed space 31, and restoring the first sealed space to the vacuum state again. The present disclosure can ensure the rapid replacement of the viewing hole lens without destroying the vacuum environment inside the furnace, further ensuring the continuity of production and the stability of the equipment.

[0034] In some embodiments, the lens mounting part 1 includes a mounting part body 12 and a lens mounting position 13. The mounting part body 12 is provided with a mounting part through hole along the direction of the viewing hole. The lens mounting position 13 is arranged on the side of the mounting part through hole away from the viewing hole. The viewing hole lens 100 is arranged at the lens mounting position 13, and the mounting part hole channel between the viewing hole lens 100 and the vacuum cut-off part 2 forms the first sealed space 11.

[0035] In this embodiment, the mounting part body 12 is provided with a mounting part through hole along the direction of the viewing hole. The entire mounting part through hole penetrates through the mounting part body 12 and faces the viewing hole of the vacuum furnace, and the mounting part hole channel between the viewing hole lens 100 and the vacuum cut-off part 2 forms the first sealed space 11. When the vacuum cut-off part 2 makes the first sealed space 11 communicate with the second sealed space 21, external staff can observe the situation inside the vacuum furnace through the viewing hole lens 100. Further, for better sealing effect to ensure the vacuum effect of the first sealed space 11, the viewing hole lens 100 is connected to the lens mounting position 13 through the first sealing ring 4. Specifically, the viewing hole lens 100 is inserted into the lens mounting position 13, and both sides are sealed by the first sealing ring 4 respectively.

[0036] In some embodiments, the lens mounting part 1 is further provided with a mounting part cover plate 14. The mounting part cover plate 14 includes a cover plate body 141 and a viewing hole flange 142. The lens mounting position 13 is arranged on the cover plate body 141. The cover plate body 141 is detachably covered on the mounting part body 12, and the viewing hole flange 142 is used to fix the viewing hole lens 100 to the lens mounting position 13.

[0037] In this embodiment, the observation hole flange 142 is fastened to the cover body 141 by screws, thereby pressing the observation hole lens 100. While ensuring the airtightness of this position, the seals on both sides also play a buffering role to prevent the observation hole lens 100 from being broken. Specifically, the detachable connection method between the cover body 141 and the installation part body 12 can be bolt connection, snap connection, etc. In this disclosure, bolt connection is specifically selected. Further, the cover body 141 is covered on the observation hole lens 100 through the second sealing ring 5, and an O-ring 17 is installed at the lower flange position of the movable cover 5 to ensure the airtightness of this position.

[0038] In some embodiments, the installation part cover 14 is further provided with a fixing member 143. One end of the cover body 141 is hinged to the installation part body 12, and the fixing member 143 is used to fix the relative positions of the cover body 141 and the installation part body 12.

[0039] In this embodiment, one end of the cover body 141 of this disclosure is hinged to the installation part body 12. For example, there is a pin hole at one end in the radial direction of the cover body 141, and it is connected to the installation part body 12 through a pin, and the other end is connected to the installation part body 12 through the fixing member 143. Specifically, the fixing member 143 can be set as a screw and a plum blossom tightening wrench. The screw is screwed into the installation part body 12 through the plum blossom tightening wrench provided at one end to fix the cover body 141 and the installation part body 12. Further, a third sealing ring is provided at the part where the cover body 141 and the installation part body 12 are closed to ensure the airtightness of this position. By means of hinging, the cover body 141 is separated from the installation part body 12 to facilitate the replacement of the observation hole lens 100. And during the process of breaking the vacuum in the first sealed space 11, the cover body 141 can avoid deviation caused by vacuum negative pressure.

[0040] In some embodiments, the vacuum cut-off part 2 is set as an ultra-high vacuum gate valve. The ultra-high vacuum gate valve can control the flow rate and pressure of gas or liquid in a vacuum environment, thereby ensuring the stability and reliability during the production process. The structure of the ultra-high vacuum gate valve consists of a valve body, a gate plate, a gasket, a driving mechanism, etc. The valve body is generally made of high-strength ceramic material and has good corrosion resistance and wear resistance in a vacuum environment. The gate plate is divided into two shapes, circular and square, according to different usage scenarios, and is made of stainless steel or other corrosion-resistant metal materials. The gasket is usually made of fluoride rubber material and has good sealing performance. The driving mechanism generally uses an electric or manual method to realize the opening and closing of the gate plate, as well as the adjustment of the flow rate and pressure. In this disclosure, a manual ultra-high vacuum gate valve is specifically selected to reduce the failure rate of the equipment.

[0041] In some embodiments, the vacuum cut-off portion 2 further includes a vacuum relief pipeline, which includes a first pipeline 6 and a second pipeline 7. The first pipeline 6 is connected to the first sealed space 11, one end of the second pipeline 7 is connected to the second sealed pipeline, and the opposite end is connected to the first pipeline 6. Wherein, a first stop valve 61 is provided on the first pipeline 6, a second stop valve 71 is provided on the second pipeline 7, and the connection between the second pipeline 7 and the first pipeline 6 is disposed between the first stop valve 61 and the first sealed space 11.

[0042] In this embodiment, the first pipeline 6 serves as the vacuum-breaking pipeline for the first sealed space 11. During use, since the vacuum cut-off portion 2 blocks the first sealed space 11 from the second sealed space 31, the first space 11 is no longer connected to the inside of the vacuum furnace. At this time, the first stop valve 61 on the first pipeline 6 is opened, allowing external air to enter the first sealed space 11 to break its vacuum state. During the process of breaking the vacuum state of the first sealed space 11, since the second pipeline 7 is connected to the second sealed space 31, the second stop valve 71 is in the closed state, still blocking the connection between the inside of the vacuum furnace and the first sealed space 11. After replacing the viewing hole lens 100, the first sealed space 11 needs to be restored to the vacuum state. At this time, the vacuum cut-off portion 2 needs to switch from the isolation state to the connection state. However, due to the negative pressure of the vacuum furnace, it is difficult for the vacuum cut-off portion 2 to complete the state conversion. In the present disclosure, before the vacuum cut-off portion 2 switches states, the second stop valve 71 is first opened, so that the second sealed space 31, which has always been in the vacuum state, is connected to the first sealed space 11 through the second pipeline 7 and the second pipeline 6, facilitating the state conversion of the vacuum cut-off portion 2. It can be understood that the first stop valve 61 is in the closed state during the process of the first sealed space 11 returning to the vacuum state. Further, the first stop valve 61 and the second stop valve 71 are provided as ball valves, which are valves driven by a valve stem and rotate around the axis of the ball valve. The ball valve can not only flexibly control the confluence, diversion, and switching of the flow direction of the medium on the pipeline, but also close any channel to connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. The ball valve is divided into pneumatic ball valves, electric ball valves, and manual ball valves according to the driving method. In the present disclosure, a manual ball valve is specifically selected to reduce the failure rate of the device.

[0043] In a second aspect of the present disclosure, a vacuum furnace is provided, including the on-line replacement device for the viewing hole lens of the vacuum furnace provided in the first aspect of the present disclosure.

[0044] In the present disclosure, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed" and the like shall be construed in a broad sense. For example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "joined" may be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0045] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present disclosure.

[0046] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A vacuum furnace observation hole lens online replacement device, characterized in that: It includes a lens mounting part, a vacuum cutting part and a peephole connecting part, one side of the peephole connecting part is connected to the peephole of the vacuum furnace, and the other side opposite to the peephole connecting part is connected to the lens mounting part through the vacuum cutting part, wherein: The lens mounting portion has a first enclosed space, the peephole connecting portion has a second enclosed space, the second enclosed space is connected to the inside of the vacuum furnace, and the vacuum cutting portion is used to isolate or connect the first enclosed space with the second enclosed space.

2. The vacuum furnace observation hole lens online replacement device according to claim 1, characterized in that: The lens mounting part includes a mounting part body and a lens mounting position, the mounting part body is provided with a mounting part through hole along the direction of the peephole, the lens mounting position is arranged on a side of the mounting part through hole away from the peephole, the observation hole lens is arranged at the lens mounting position, and the mounting part channel between the observation hole lens and the vacuum cutting part forms the first enclosed space.

3. The vacuum furnace observation hole lens online replacement device according to claim 2, characterized in that: The observation hole lens is connected to the lens installation position through a first sealing ring.

4. The vacuum furnace observation hole lens online replacement device according to claim 2, characterized in that: The lens mounting portion is also provided with a mounting portion cover, which includes a cover body and an observation hole flange. The lens mounting position is provided on the cover body, and the cover body is detachably covered on the mounting portion body. The observation hole flange is used to fix the observation hole lens to the lens mounting position.

5. The vacuum furnace observation hole lens online replacement device according to claim 4, characterized in that: The cover plate body is covered on the observation hole lens through a second sealing ring.

6. The vacuum furnace observation hole lens online replacement device according to claim 4, characterized in that: The mounting portion cover is also provided with a fixing piece, one end of the cover body is hinged to the mounting portion body, and the fixing piece is used to fix the relative position of the cover body and the mounting portion body.

7. The vacuum furnace observation hole lens online replacement device according to claim 1, characterized in that: The vacuum cut-off portion is configured as an ultra-high vacuum gate valve.

8. The vacuum furnace observation hole lens online replacement device according to claim 1, characterized in that: The vacuum cut-off part further includes a vacuum release pipeline, the vacuum release pipeline includes a first pipeline and a second pipeline, the first pipeline is connected to the first enclosed space, one end of the second pipeline is connected to the second enclosed pipeline, and the other end opposite to the first pipeline is connected to the first pipeline, wherein, The first pipeline is provided with a first stop valve, the second pipeline is provided with a second stop valve, and the connection between the second pipeline and the first pipeline is provided between the first stop valve and the first enclosed space.

9. The vacuum furnace observation hole lens online replacement device according to claim 8, characterized in that: The first stop valve and the second stop valve are configured as ball valves.

10. A vacuum furnace, characterized in that: The invention comprises the online replacement device for the observation hole lens of a vacuum furnace as described in any one of claims 1 to 9.

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