Sealing device for vacuum melting furnace

Abstract

The invention 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 invention relates to the technical field of metal smelting, and in particular to a sealing device for a vacuum smelting furnace. Background Art

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

[0017] : two medium-frequency induction copper tubes are arranged in a molding sleeve, the inner ends of the medium-frequency induction copper tubes pass through the inner epoxy fixing plate, and the outer ends of the medium-frequency induction copper tubes pass through the outer epoxy fixing plate and are connected to an external water cable. The molding sleeve achieves insulation and sealing fixation by casting silicone between the outer peripheral rotating tube and the medium-frequency induction copper tube. The sealing method of casting silicone rubber in the molding sleeve has an unsatisfactory sealing effect in actual production and has leakage. Therefore, a sealing device with better sealing and insulation effect is needed to be used in the molding sleeve. The molding sleeve is referred to as the stainless steel rotating tube hereinafter, which can fix the medium-frequency induction copper tube and achieve sealing and insulation. Summary of the invention

[0003] Problem to be solved: Provide a sealing device with better sealing and insulating effect for use at the stainless steel rotating tube of the medium frequency induction copper tube on the furnace body, replacing the original casting silicone rubber solution, so as to achieve sealing between the sealing device and the inner wall of the stainless steel rotating tube, and the internal through hole of the sealing device tightly holds and fixes the medium frequency induction copper tube and achieves the effect of sealing and insulating.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sealing device for a vacuum melting furnace, comprising an epoxy insulating plate and a sealing rubber ring, the epoxy insulating plate and the sealing rubber ring 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 the epoxy insulating plate, and the outermost layer of the multi-layer structure away from the inside of the furnace body is the epoxy insulating plate, and a clamping component is arranged on the outermost layer of the multi-layer structure, and the epoxy insulating plate, the sealing rubber ring and the clamping component are all provided with through holes for the medium-frequency induction copper tube to pass through; the through holes on the epoxy insulating plate or the through holes on the sealing rubber ring are provided with extension parts, and the through holes on the epoxy insulating plate and the through holes on the sealing rubber ring are interference fit through the extension parts.

[0005] Preferably, the through hole on the epoxy insulating board is an insulating board through hole, and both ends of the insulating board through hole are conical surface one; the through hole on the sealing rubber ring is a rubber ring through hole, and the extensions at both ends of the rubber ring through hole are frustum two, the outer side of frustum two is a conical surface, and frustum two is an interference fit with conical surface one.

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

[0007] Preferably, an outwardly convex annular step 1 is provided in the middle of the side of the epoxy insulation board, and a frustum 1 is provided at both ends of the annular step 1 in mirror symmetry; a conical surface 2 is provided at both ends of the sealing rubber ring in mirror symmetry, and the conical surface 2 is interference fit with the adjacent frustum 1.

[0008] Preferably, the height of the second frustum is the same as that of the first cone, and the height of the second cone is the same as that of the first frustum.

[0009] Preferably, the inner diameter of the second cone surface is smaller than the outer diameter of the first frustum; and the outer diameter of the second frustum is larger than the inner diameter of the first cone surface.

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

[0011] Compared with the prior art, the present invention provides a sealing device for a vacuum melting furnace, which has the following beneficial effects: the device of the present invention is arranged by a multi-layer structure in which epoxy insulating plates and sealing rubber rings are stacked in sequence, and then the outermost flange is squeezed by a nut, and insulating glue is applied between the multi-layer structures. The through holes on the multi-layer structure tightly hold the medium-frequency induction copper tube, thereby achieving the effect of tightly holding and fixing the medium-frequency induction copper tube. Due to the interference fit between the conical surface and the frustum between the multi-layer layered structures, the extrusion of the outer end flange makes the clamping fit between the layered structures tighter, thereby achieving a good sealing and insulation effect, achieving the sealing of the outer side of the sealing rubber ring and the inner wall of the stainless steel rotating tube, and the through hole of the sealing rubber ring tightly holds and fixes the medium-frequency induction copper tube and achieves the effect of sealing and insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the epoxy insulation board of the present invention;

[0013] Figure 2 It is a cross-sectional schematic diagram of the epoxy insulation board of the present invention;

[0014] Figure 3 It is a schematic diagram of the structure of the sealing rubber ring of the present invention;

[0015] Figure 4 It is a cross-sectional schematic diagram of the sealing rubber ring of the present invention;

[0016] Figure 5 This is a schematic diagram of the epoxy insulation board and the sealing rubber ring of the present invention;

[0017] Figure 6 It is a schematic diagram of the use of the device of the present invention;

[0018] Explanation of the reference numerals in the accompanying drawings: 1. Epoxy insulating board; 11. Through hole of insulating board; 111. Conical surface one; 12. Annular step one; 13. Cone one; 2. Sealing rubber ring; 21. Through hole of rubber ring; 211. Cone two; 22. Conical surface two; 3. Furnace body; 31. Stainless steel rotating tube; 4. Medium frequency induction copper tube; 41. Water inlet side of medium frequency induction copper tube; 42. Water outlet side of medium frequency induction copper tube; 5. Pressing component. DETAILED DESCRIPTION

[0019] The technical solution in the embodiment of the present invention will be described below in conjunction with the accompanying drawings in the embodiment of the present invention:

[0020] As shown in the figure, as described in the background technology, the sealing device of the present invention is used at the stainless steel rotating tube 31 of the vacuum melting furnace to achieve the insulation seal between the sealing device and the inner wall of the stainless steel rotating tube 31 and the insulation seal between the sealing device and the medium frequency induction copper tube 4. The stainless steel rotating tube 31 and the furnace body 3 are an integrally formed structure, thereby achieving the sealing of the furnace body 3 at the stainless steel rotating tube 31. The medium frequency induction copper tube 4 passes through the stainless steel rotating tube 31 on the side of the furnace body 3. The device of the present invention includes an epoxy insulating plate 1 and a sealing rubber ring 2. The epoxy insulating plate 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 tube 31 is the epoxy insulating plate 1. The inner end of the stainless steel rotating tube 31 is provided with a support plate to carry the innermost epoxy insulating plate 1. The outermost layer of the multi-layer structure outside the stainless steel rotating tube 31 is also the epoxy insulating plate 1. In this embodiment, five layers of epoxy insulating plates 1 and four layers of sealing rubber rings 2 are used as examples for illustration, but the number of layers is not limited. The five layers of epoxy insulating plates 1 and the four layers of sealing rubber rings 2 are arranged from the inside to the outside in the order of epoxy insulating plate 1, sealing rubber ring 2, epoxy insulating plate 1, sealing rubber ring 2, epoxy insulating plate 1, sealing rubber ring 2, epoxy insulating plate 1, sealing rubber ring 2, and epoxy insulating plate 1. The outermost layer of the multi-layer structure is provided with a clamping component 5, which is connected to the outer end of the stainless steel rotating tube 31. The clamping component 5 is a stainless steel flange, which is located on the outer side of the outermost epoxy insulating plate 1. The outer circle of the stainless steel flange matches the inner circle of the stainless steel rotating tube 31. The screws are pressed on the stainless steel flange, and the inner circle of the stainless steel flange is smaller than its outer circle. When the screws are tightened, the flange has a clamping force extruding in the direction of the furnace body 3. A safe distance is left between the screws and the medium-frequency induction copper tube 4, which does not affect the conductive effect of the medium-frequency induction copper tube 4. The epoxy insulating board 1, the sealing rubber ring 2 and the stainless steel flange are all provided with through holes for the medium frequency induction copper tube 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 medium frequency induction copper tube 4 to pass through, one group of insulating board through holes 11 and rubber ring through holes 21 is for the medium frequency induction copper tube water inlet side 41 to pass through, and the other group of insulating board through holes 11 and rubber ring through holes 21 is for the medium frequency induction copper tube water outlet side 42 to pass through.

[0021] An outwardly convex annular step 12 is provided in the middle of the side surface of the epoxy insulating board 1. The outer diameter of the annular step 12 is tightly engaged with the inner diameter of the stainless steel rotating tube 31. Cone 13 is provided at both ends of the annular step 12 in a mirror-symmetrical manner. Cone 22 is provided on the sealing rubber ring 2 in a mirror-symmetrical manner. Cone 22 is interference-fitted with the corresponding cone 13. Cone 22 has the same taper and height as cone 13. However, the radius of the bottom surface of cone 22 is smaller than the radius of the bottom surface of cone 13, that is, the inner diameter of cone 22 is smaller than the outer diameter of cone 13. In this way, when the conical surface 22 and the cone 1 13 are clamped, an interference fit can be achieved between the two; when the two are clamped, the epoxy insulating plate 1 will form an interference fit with the outer periphery of the sealing rubber ring 2, and the outer wall of the sealing rubber ring 2 will form an interference fit with the inner wall of the stainless steel rotating tube 31, thereby achieving close contact between the sealing device and the inner wall of the stainless steel rotating tube 31; during the fixing and clamping process of the clamping 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, thereby achieving sealing between the sealing rubber ring 2 and the inner wall of the stainless steel rotating tube 31.

[0022] From the above, it can be known that the device of the present invention has achieved sealing with the inner side of the stainless steel rotating tube 31, so the insulation sealing should also be achieved between the medium frequency induction copper tube water inlet side 41, the medium frequency induction copper tube water outlet side 42 and each through hole. Taking the medium frequency induction copper tube water inlet side 41 as an example, the specific implementation method is to set a conical surface 111 at both ends of the insulating plate through hole 11 in a mirror-symmetrical manner, and the smallest inner diameter of the insulating plate through hole 11 is transitionally matched with the outer diameter of the medium frequency induction copper tube water inlet side 41; the outer ends of the rubber ring through hole 21 are mirror-symmetrically provided with a frustum 211, and the frustum 211 is interference-fitted with the corresponding conical surface 111, and the frustum 211 has the same height and taper as the conical surface 111, and 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 conical surface 111, that is, the outer diameter of the frustum 211 is larger than the inner diameter of the conical surface 111 to achieve an interference fit between the frustum 211 and the corresponding conical surface 111. When the medium frequency induction copper tube water inlet side 41 is sleeved in the device of the present invention, the rubber ring through hole 21 and the overlapping part of the insulating plate through hole 11 tightly hold it. The greater the squeezing force of the pressing component 5, the greater the squeezing 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, so that the rubber ring through hole 21 holds the medium frequency induction copper tube water inlet side 41 more tightly to achieve sealing. Another group of insulating plate through holes 11 and rubber ring through holes 21 hold the medium frequency induction copper tube water outlet side 42 tightly and seal it.

[0023] When in use, the intermediate frequency induction copper tube 4 has been placed in the position of the stainless steel rotating tube 31, with the upper part being the water inlet side 41 of the intermediate frequency induction copper tube, and the lower part being the water outlet side 42 of the intermediate frequency induction copper tube, and the epoxy insulating board 1, the sealing rubber ring 2, the epoxy insulating board 1, the sealing rubber ring 2, the epoxy insulating board 1, the sealing rubber ring 2, the epoxy insulating board 1, the sealing rubber ring 2, the epoxy insulating board 1, the sealing rubber ring 2, and the epoxy insulating board 1 are placed in the stainless steel rotating tube 31 in the order of one group of insulating board through holes 11 and the rubber ring through holes 21 are sleeved through the water inlet side 41 of the intermediate frequency induction copper tube, and the other group of insulating board through holes 11 and the rubber ring through holes 21 are sleeved through the water outlet side 42 of the intermediate frequency induction copper tube, and the adjacent rings are placed in the stainless steel rotating tube 31. After the epoxy insulating plate 1 and the sealing rubber ring 2 are snap-fitted, the flange at the outer end of the stainless steel rotating tube 31 is used to push the stainless steel rotating tube 31 into the inside to apply extrusion force to the multi-layer structure. The core of the sealing device of the present invention is that the epoxy insulating plate 1 and the sealing rubber ring 2 are stacked in layers in sequence, and the outermost epoxy insulating plate 1 is squeezed inward by screws with a stainless steel flange, forcing the outer circle of the sealing rubber ring 2 to expand the inner circle of the stainless steel rotating tube 31, and the inner circle of the rubber ring through hole 21 is squeezed and deformed to hold the outer circle of the medium-frequency induction copper tube 4, so that the furnace body 3, the medium-frequency induction copper tube 4, the epoxy insulating plate 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 more tightly supported, and the inner circle of the rubber ring through hole is more tightly held, and the sealing effect reaches the best state. At the same time, insulating glue is applied between the epoxy insulating plate 1 and the sealing rubber ring 2 to achieve a better insulation effect. Insulation sealing installation is thus completed to meet the working needs 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 sealing device designed as above has a very good actual effect.

[0024] The above embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A sealing device for a vacuum melting furnace, characterized in that: The invention comprises an epoxy insulating plate (1) and a sealing rubber ring (2), wherein the epoxy insulating plate (1) and the sealing rubber ring (2) are stacked in sequence to form a multi-layer structure, wherein the innermost layer of the multi-layer structure close to the interior of a furnace body (3) is the epoxy insulating plate (1), and the outermost layer of the multi-layer structure far from the interior of the furnace body (3) is the epoxy insulating plate (1), and a pressing component (5) is arranged on the outermost layer of the multi-layer structure, and the epoxy insulating plate (1), the sealing rubber ring (2) and the pressing component (5) are all provided with a through hole for a medium-frequency induction copper tube (4) to pass through; the through hole on the epoxy insulating plate (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 plate (1) and the through hole on the sealing rubber ring (2) are interference-fitted through the extension part.

2. The sealing device for a vacuum melting furnace according to claim 1, characterized in that: The through hole on the epoxy insulating plate (1) is an insulating plate through hole (11), and both ends of the insulating plate through hole (11) are conical surfaces (111); the through hole on the sealing rubber ring (2) is a rubber ring through hole (21), and the extensions at both ends of the rubber ring through hole (21) are frustums (211), and the outer side of the frustums (211) is a conical surface, and the frustums (211) and the conical surface (111) are interference fit.

3. The sealing device for a vacuum melting furnace according to claim 2, characterized in that: The insulating plate has two through holes (11), the rubber ring has two 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: An outwardly convex annular step (12) is provided in the middle of the side surface of the epoxy insulating plate (1), and a frustum (13) is provided at both ends of the annular step (12) in a mirror-symmetrical manner; a conical surface (22) is provided at both ends of the sealing rubber ring (2) in a mirror-symmetrical manner, and the conical surface (22) is interference-fitted with the adjacent frustum (13).

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

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

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

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