Sealing device for vacuum melting furnace

Abstract

The utility model relates to the technical field of metal smelting, in particular to a sealing device for a vacuum smelting furnace. Comprising epoxy insulating plates and sealing rubber rings, the epoxy insulating plates and the sealing rubber rings are sequentially stacked to form a multi-layer structure, the innermost layer, close to the interior of a furnace body, of the multi-layer structure is the epoxy insulating plate, the outermost layer, away from the interior of the furnace body, of the multi-layer structure is the epoxy insulating plate, and the outermost layer of the multi-layer structure is provided with a pressing part. The epoxy insulating plate, the sealing rubber ring and the pressing part are respectively provided with a through hole for the medium-frequency induction copper pipe to pass through; the through hole in the epoxy insulating plate or the through hole in the sealing rubber ring is provided with an extending part, and the through hole in the epoxy insulating plate is in interference fit with the through hole in the sealing rubber ring through the extending part. The outer side of the sealing rubber ring and the inner wall of the stainless steel rotating pipe are sealed, the medium-frequency induction copper pipe is tightly held and fixed through a through hole of the sealing rubber ring, and the sealing and insulating effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting, in particular to a sealing device for a vacuum melting furnace. Background Technique

[0002] CN110207492A discloses a simple vacuum melting furnace. In the

[0017] part of this application: two intermediate frequency induction copper tubes are arranged inside the forming sleeve. The inner ends of the intermediate frequency induction copper tubes penetrate through the inner epoxy fixing plate, and the outer ends of the intermediate frequency induction copper tubes penetrate through the outer epoxy fixing plate and are connected to the external water cable. The forming sleeve realizes insulating and sealing fixation by casting silicone rubber between the outer peripheral rotating tube and the intermediate frequency induction copper tube. The sealing method of casting silicone rubber inside the forming sleeve has an unsatisfactory sealing effect in actual production and there is a leakage phenomenon. Therefore, a sealing device with better sealing and insulating effects is needed to be used inside the forming sleeve. The forming sleeve is simply referred to as a stainless steel rotating tube in the following text, to achieve the effect of fixing the intermediate frequency induction copper tube and realizing sealing and insulation. Content of the Utility Model

[0003] Problem to be Solved: Provide a sealing device with better sealing and insulating effects to be used at the stainless steel rotating tube of the intermediate frequency induction copper tube on the furnace body, replacing the original silicone rubber casting scheme, to achieve the sealing between the sealing device and the inner wall of the stainless steel rotating tube, and the inner through holes of the sealing device tightly hold and fix the intermediate frequency induction copper tube and realize the effect of sealing and insulation.

[0004] To achieve the above object, the utility model provides the following technical solution: A sealing device for a vacuum melting furnace, including epoxy insulating plates and sealing rubber rings. The epoxy insulating plates and the sealing rubber rings are stacked in sequence to form a multi-layer structure. The innermost layer of the multi-layer structure close to the inside of the furnace body is an epoxy insulating plate, the outermost layer of the multi-layer structure far from the inside of the furnace body is an epoxy insulating plate, and a pressing component is arranged on the outermost layer of the multi-layer structure. The epoxy insulating plates, the sealing rubber rings and the pressing component are all provided with through holes for the intermediate frequency induction copper tube to pass through; the through holes on the epoxy insulating plates or the through holes on the sealing rubber rings are provided with extension parts, and the through holes on the epoxy insulating plates and the through holes on the sealing rubber rings are in interference fit through the extension parts.

[0005] Preferably, the through holes on the epoxy insulating plates are insulating plate through holes, and both ends of the insulating plate through holes are conical surfaces one; the through holes on the sealing rubber rings are rubber ring through holes, and the extension parts at both ends of the rubber ring through holes are frustum cones two. The outer side of the frustum cone two is a conical surface, and the frustum cone two is in interference fit with the conical surface one.

[0006] Preferably, there are two insulating plate through holes and two rubber ring through holes, and the pressing component is a flange.

[0007] Preferably, an outwardly convex annular step one is provided in the middle of the side of the epoxy insulating board, and a frustum one is provided at both ends of the annular step one in mirror symmetry; conical surfaces two are provided at both ends of the sealing rubber ring in mirror symmetry, and the conical surfaces two are in interference fit with the adjacent frustum one.

[0008] Preferably, the frustum two and the conical surface one have the same height, and the conical surface two and the frustum one have the same height.

[0009] Preferably, the inner diameter of the conical surface two is smaller than the outer diameter of the frustum one; the outer diameter of the frustum two is larger than the inner diameter of the conical surface one.

[0010] Preferably, insulating glue is applied between the epoxy insulating board and the sealing rubber ring.

[0011] Compared with the prior art, the present utility model provides a sealing device for a vacuum melting furnace, which has the following beneficial effects: the device of the present utility model is provided with a multi-layer structure in which an epoxy insulating board and a sealing rubber ring are stacked in sequence, and then the outermost flange is extruded by a nut, insulating glue is applied between the multi-layer structures, and the through holes on the multi-layer structures tightly hold the intermediate frequency induction copper tube, achieving the effect of tightly holding and fixing the intermediate frequency induction copper tube. Due to the interference fit between the conical surfaces and the frustum one between the multi-layer structures, the extrusion of the outer flange makes the clamping fit between the layer structures closer, thereby achieving a good sealing and insulating effect, achieving the sealing between the outer side of the sealing rubber ring and the inner wall of the stainless steel rotating tube, and the through holes of the sealing rubber ring tightly hold and fix the intermediate frequency induction copper tube and achieve the sealing and insulating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the epoxy insulating board of the present utility model;

[0013] Figure 2 is a schematic cross-sectional view of the epoxy insulating board of the present utility model;

[0014] Figure 3 is a schematic structural diagram of the sealing rubber ring of the present utility model;

[0015] Figure 4 is a schematic cross-sectional view of the sealing rubber ring of the present utility model;

[0016] Figure 5 is a schematic diagram of the clamping fit between the epoxy insulating board and the sealing rubber ring of the present utility model;

[0017] Figure 6 is a schematic diagram of the use of the device of the present utility model;

[0018] Description of the reference numerals: 1. epoxy insulating board; 11. insulating board through hole; 111. first conical surface; 12. first annular step; 13. first frustum; 2. sealing rubber ring; 21. rubber ring through hole; 211. second frustum; 22. second conical surface; 3. furnace body; 31. stainless steel rotating pipe; 4. intermediate frequency induction copper pipe; 41. water inlet side of the intermediate frequency induction copper pipe; 42. water outlet side of the intermediate frequency induction copper pipe; 5. pressing component. Detailed implementation mode

[0019] The following will describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention:

[0020] As shown in the figure, as described in the background art, the sealing device of the present invention is used at the stainless steel rotating pipe 31 of the vacuum melting furnace to achieve the insulating seal between the sealing device and the inner wall of the stainless steel rotating pipe 31 and the insulating seal between the sealing device and the intermediate frequency induction copper pipe 4. The stainless steel rotating pipe 31 and the furnace body 3 are integrally formed structures, thereby realizing the seal of the furnace body 3 at the stainless steel rotating pipe 31. The intermediate frequency induction copper pipe 4 penetrates through the stainless steel rotating pipe 31 on the side of the furnace body 3. The device of the present invention includes an epoxy insulating board 1 and a sealing rubber ring 2. The epoxy insulating board 1 and the sealing rubber ring 2 are stacked in sequence to form a multi-layer structure. The innermost layer of the multi-layer structure close to the inside of the stainless steel rotating pipe 31 is the epoxy insulating board 1. A support plate is provided at the inner end of the stainless steel rotating pipe 31 to support the innermost epoxy insulating board 1. The outermost layer of the multi-layer structure outside the stainless steel rotating pipe 31 is also the epoxy insulating board 1. In this embodiment, five epoxy insulating boards 1 and four sealing rubber rings 2 are used as an example for illustration, which is not a limitation on the number of layers. The five epoxy insulating boards 1 and the four sealing rubber rings 2 are sequentially arranged from the inside to the outside as epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1. A pressing component 5 is provided on the outermost layer of the multi-layer structure. The pressing component 5 is connected to the outer end of the stainless steel rotating pipe 31. The pressing component 5 is a stainless steel flange. The stainless steel flange is located outside the outermost epoxy insulating board 1. The outer circle of the stainless steel flange is matched with the inner circle of the stainless steel rotating pipe 31. The screw abuts against the stainless steel flange. The inner circle of the stainless steel flange is smaller than its outer circle. When the screw is tightened, the flange has a pressing force that squeezes towards the furnace body 3. A safety distance is left between the screw and the intermediate frequency induction copper pipe 4, which does not affect the conductive function of the intermediate frequency induction copper pipe 4. The epoxy insulating board 1, the sealing rubber ring 2 and the stainless steel flange are all provided with through holes for the intermediate frequency induction copper pipe 4 to pass through; the through holes on the epoxy insulating board 1 include two insulating board through holes 11, the through holes on the sealing rubber ring 2 include two rubber ring through holes 21, and the flange is also provided with two through holes for the intermediate frequency induction copper pipe 4 to pass through. One group of insulating board through holes 11 and rubber ring through holes 21 are for the water inlet side 41 of the intermediate frequency induction copper pipe to pass through, and the other group of insulating board through holes 11 and rubber ring through holes 21 are for the water outlet side 42 of the intermediate frequency induction copper pipe to pass through.

[0021] In the middle of one side of the epoxy insulating plate 1, there is an outwardly convex annular step 12. The outer diameter of the annular step 12 is tightly clamped with the inner diameter of the stainless steel rotating tube 31. On both ends of the annular step 12, there are frustum 13s that are mirror-symmetrical. On the sealing rubber ring 2, there are frustum surfaces 22 that are mirror-symmetrical. The frustum surface 22 is in interference fit with the corresponding frustum 13. The taper and height of the frustum surface 22 and the frustum 13 are the same, but the radius of the upper bottom surface of the frustum surface 22 is smaller than the radius of the upper bottom surface of the frustum 13, that is, the inner diameter of the frustum surface 22 is smaller than the outer diameter of the frustum 13. In this way, interference fit can be achieved when the frustum surface 22 and the frustum 13 are clamped. When the two are clamped, the epoxy insulating plate 1 will form an interference fit with the periphery of the sealing rubber ring 2, and the outer wall of the sealing rubber ring 2 and the inner wall of the stainless steel rotating tube 31 will form an interference fit, realizing the close contact between the sealing device and the inner wall of the stainless steel rotating tube 31. During the fixed pressing process of the pressing component 5, the outer side of the sealing rubber ring 2 and the inner wall of the stainless steel rotating tube 31 can be further sealed and insulated, realizing the sealing between the sealing rubber ring 2 and the inner wall of the stainless steel rotating tube 31.

[0022] As can be seen from the above, the device of the present utility model has been sealed with the inner side of the stainless steel rotating tube 31. Then, the insulating and sealing between the water inlet side 41 of the intermediate frequency induction copper tube, the water outlet side 42 of the intermediate frequency induction copper tube and each through hole also needs to be realized. Taking the water inlet side 41 of the intermediate frequency induction copper tube as an example, the specific implementation method is that on both ends of the insulating plate through hole 11, there are frustum surfaces 111 that are mirror-symmetrical. The minimum inner diameter of the insulating plate through hole 11 is in transitional fit with the outer diameter of the water inlet side 41 of the intermediate frequency induction copper tube. On the outer sides of both ends of the rubber ring through hole 21, there are frustum 211s that are mirror-symmetrical. The frustum 211 is in interference fit with the corresponding frustum surface 111. The height and taper of the frustum 211 and the frustum surface 111 are the same. The outer diameter of the upper bottom surface of the frustum 211 is larger than the inner diameter of the upper bottom surface of the frustum surface 111, that is, the outer diameter of the frustum 211 is larger than the inner diameter of the frustum surface 111 to realize the interference fit between the frustum 211 and the corresponding frustum surface 111. When the water inlet side 41 of the intermediate frequency induction copper tube is sleeved inside the device of the present utility model, the overlapping part of the rubber ring through hole 21 and the insulating plate through hole 11 will tightly hold it. The greater the extrusion force of the pressing component 5, the greater the extrusion force of the rubber ring through hole 21 on the insulating plate through hole 11, and the greater the deformation of the sealing rubber ring 2, making the rubber ring through hole 21 hold the water inlet side 41 of the intermediate frequency induction copper tube tighter to realize sealing. Another group of insulating plate through holes 11 and rubber ring through holes 21 will tightly hold and seal the water outlet side 42 of the intermediate frequency induction copper tube.

[0023] During use, the intermediate-frequency induction copper tube 4 has been placed at the position of the stainless-steel rotating tube 31, with the upper side being the water inlet side 41 of the intermediate-frequency induction copper tube and the lower side being the water outlet side 42 of the intermediate-frequency induction copper tube. It is sequentially placed into the stainless-steel rotating tube 31 in the order of epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1, sealing rubber ring 2, epoxy insulating board 1. And make a set of insulating board through-holes 11 and rubber ring through-holes 21 sleeved through the water inlet side 41 of the intermediate-frequency induction copper tube, and the other set of insulating board through-holes 11 and rubber ring through-holes 21 sleeved through the water outlet side 42 of the intermediate-frequency induction copper tube. After the adjacent epoxy insulating board 1 and sealing rubber ring 2 are engaged in a snap-fit, a flange is used at the outer end of the stainless-steel rotating tube 31 to push inward into the stainless-steel rotating tube 31 to apply an extrusion pressure to the multi-layer structure. The core of the sealing device of the present invention is that the epoxy insulating board 1 and the sealing rubber ring 2 are stacked in multiple layers in sequence. The outermost epoxy insulating board 1 is pressed inward by a stainless-steel flange through screws, forcing the outer circle of the sealing rubber ring 2 to expand the inner circle of the stainless-steel rotating tube 31. The inner circle of the rubber ring through-hole 21 is squeezed and deformed to tightly hold the outer circle of the intermediate-frequency induction copper tube 4, so that the furnace body 3, the intermediate-frequency induction copper tube 4, the epoxy insulating board 1 and the sealing rubber ring 2 form an integrated connection, thereby achieving a highly sealed effect. Due to the extrusion deformation, the outer circle of the sealing rubber ring 2 is held tighter, and the inner circle of the rubber ring through-hole is held tighter, and the sealing effect reaches the best state. At the same time, insulating glue is applied between the epoxy insulating board 1 and the sealing rubber ring 2 to achieve a better insulating effect. Thus, the insulation and sealing installation is completed to meet the working requirements of the vacuum melting furnace. The device of the present invention has been produced and used in a vacuum melting furnace. Practice has proved that the actual effect of the sealing device designed as above is very good.

[0024] The above embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A sealing device for a vacuum melting furnace, characterized in that: It includes an epoxy insulating board (1) and a sealing rubber ring (2). The epoxy insulating board (1) and the sealing rubber ring (2) are stacked in sequence to form a multi-layer structure. The innermost layer of the multi-layer structure close to the inside of the furnace body (3) is the epoxy insulating board (1), and the outermost layer of the multi-layer structure far from the inside of the furnace body (3) is the epoxy insulating board (1). A pressing component (5) is arranged on the outermost layer of the multi-layer structure. The epoxy insulating board (1), the sealing rubber ring (2), and the pressing component (5) are all provided with through holes for the intermediate frequency induction copper tube (4) to pass through. The through hole on the epoxy insulating board (1) or the through hole on the sealing rubber ring (2) is provided with an extension part, and the through hole on the epoxy insulating board (1) and the through hole on the sealing rubber ring (2) are in interference fit through the extension part.

2. The sealing device for a vacuum melting furnace according to claim 1, wherein: The through hole on the epoxy insulating board (1) is an insulating board through hole (11), and both ends of the insulating board through hole (11) are conical surfaces one (111); the through hole on the sealing rubber ring (2) is a rubber ring through hole (21), and the extension parts at both ends of the rubber ring through hole (21) are frustum cones two (211). The outer side of the frustum cone two (211) is a conical surface, and the frustum cone two (211) is in interference fit with the conical surface one (111).

3. The sealing device for a vacuum melting furnace according to claim 2, characterized in that: There are two insulating board through holes (11) and two rubber ring through holes (21), and the pressing component (5) is a flange.

4. The sealing device for a vacuum melting furnace according to claim 3, characterized in that: In the middle of the side surface of the epoxy insulating board (1), there is an outwardly convex annular step one (12), and frustum cones one (13) are symmetrically arranged at both ends of the annular step one (12) in a mirror image manner; at both ends of the sealing rubber ring (2), conical surfaces two (22) are symmetrically arranged in a mirror image manner, and the conical surfaces two (22) are in interference fit with the adjacent frustum cones one (13).

5. The sealing device for a vacuum melting furnace according to claim 4, characterized in that: The height of the frustum cone two (211) is the same as that of the conical surface one (111), and the height of the conical surface two (22) is the same as that of the frustum cone one (13).

6. The sealing device for a vacuum melting furnace according to claim 5, characterized in that: The inner diameter of the conical surface two (22) is smaller than the outer diameter of the frustum cone one (13); the outer diameter of the frustum cone two (211) is larger than the inner diameter of the conical surface one (111).

7. The sealing device for a vacuum melting furnace according to claim 1, characterized in that: Insulating glue is applied between the epoxy insulating board (1) and the sealing rubber ring (2).

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