A high vacuum induction continuous casting furnace for precious metals

Abstract

The present invention proposes a precious metal high vacuum induction continuous casting furnace, which is provided with two stepper motors at intervals on the vacuum tank, each stepper motor can drive a lifting screw to rotate, and the two lifting screws are respectively matched with two threaded holes provided on the pressure plate. When the two stepper motors are driven to move, the pressure plate can be raised or lowered. When the pressure plate is lowered, it can squeeze the O-ring provided at the second cold water jacket located above. At this time, the O-ring produces radial deformation and contacts the outer side of the quartz cover to achieve clamping and sealing of the quartz cover. The precious metal high vacuum induction continuous casting furnace involved in the present application can further strengthen the sealing of the quartz cover, and can effectively prevent the shaking of the quartz cover, so that the sealing of the precious metal high vacuum induction continuous casting furnace is better, ensuring that it can obtain a high vacuum environment.

Description

Technical Field

[0001] The invention relates to the technical field of metal smelting, and in particular to a high vacuum induction continuous casting furnace for precious metals. Background Art

[0002] The precious metal high vacuum induction continuous casting furnace is a modern equipment that uses the electromagnetic induction principle to melt metal materials under high vacuum conditions and casts bars through a set of traction mechanisms. This smelting method can be carried out in a high vacuum environment, thereby effectively preventing metal oxidation and impurity contamination, and ensuring the purity and quality of the smelted products.

[0003] However, the quartz cover in the existing noble metal high vacuum induction continuous casting furnace has a cut end surface and an insufficiently smooth surface, which results in poor sealing performance and makes it difficult to obtain a high vacuum. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present application proposes a precious metal high vacuum induction continuous casting furnace so as to obtain high vacuum.

[0005] In order to achieve the above-mentioned purpose, the present application proposes a precious metal high-vacuum induction continuous casting furnace, including a continuous casting furnace body, and two stepper motors are arranged at intervals on the vacuum tank of the continuous casting furnace body, respectively recorded as a first stepper motor and a second stepper motor, the first stepper motor can drive the first lifting screw to rotate, and the second stepper motor can drive the second lifting screw to rotate, the first lifting screw and the second lifting screw are respectively matched with two threaded holes arranged on the pressure plate, when the first stepper motor and the second stepper motor are driven to act, the pressure plate can be raised or lowered, when the pressure plate is lowered, it can squeeze the O-ring arranged at the second cold water jacket, at this time, the O-ring produces radial deformation and contacts with the outer side surface of the quartz cover in the continuous casting furnace body, so as to achieve the effect of clamping and sealing the quartz cover, and also play a fixing role; when the pressure plate rises, the O-ring returns to its original state under the action of its own elastic deformation and leaves the quartz cover; the second cold water jacket is arranged on the first cold water jacket, and the first cold water jacket is located below, which is fixed on the vacuum tank.

[0006] In some embodiments, a first L-shaped sealing gasket is fixedly provided in the upper cover of the continuous casting furnace body, and the upper end surface of the quartz cover contacts the first L-shaped sealing gasket to achieve sealing of the upper end of the quartz cover.

[0007] In some embodiments, the lower end of the quartz cover is in the first cold water jacket, a second L-shaped sealing gasket is fixed in the first cold water jacket, and the lower end surface of the quartz cover contacts the second L-shaped sealing gasket to achieve sealing of the lower end of the quartz cover.

[0008] In some embodiments, a cooling mechanism is further included, in which a second cooling channel is provided in the second cooling water jacket, and the second cooling channel is connected to the cooling mechanism. The cooling mechanism enables cold water to continuously flow in the second cooling channel so as to cool the O-ring.

[0009] The beneficial effect of the solution of the present application is that the above-mentioned precious metal high vacuum induction continuous casting furnace can further strengthen the sealing of the quartz cover and effectively prevent the quartz cover from shaking, so that the sealing of the precious metal high vacuum induction continuous casting furnace is better and it is ensured that it can obtain a high vacuum degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic structural diagram of a noble metal high vacuum induction continuous casting furnace at one angle is shown in the embodiment.

[0011] Figure 2 A schematic structural diagram of the precious metal high vacuum induction continuous casting furnace from another angle is shown in the embodiment.

[0012] Figure 3 A schematic diagram of the partial cross-sectional structure of a precious metal high vacuum induction continuous casting furnace in an embodiment is shown.

[0013] Figure 4 Shows Figure 3 Enlarged view of II.

[0014] Figure 5 The schematic diagram of the structure of two cooling water jackets in the embodiment is shown.

[0015] Figure 6 Shows Figure 5 Schematic diagram of the cross-sectional structure.

[0016] Figure markings: 1-base, 2-support frame, 3-vacuum tank, 301-vacuum interface, 302-observation window, 303-cavity, 4-shell, 5-induction coil, 6-control box, 7-quartz cover, 8-upper cover, 9-connecting column, 10-first L-shaped sealing gasket, 11-first cold water jacket, 1101-first cooling channel, 12-second L-shaped sealing gasket, 13-second cold water jacket, 1301-second cooling channel, 14-O-ring, 15-pressing plate, 16-first lifting screw, 17-second lifting screw, 18-first stepping motor, 19-second stepping motor, 20-crucible, 21-crystallizer, 22-cooling mechanism. DETAILED DESCRIPTION

[0017] The specific implementation of the present application is further described below in conjunction with the accompanying drawings.

[0018] In the description of the present application, it should be understood that the terms "first", "second", etc. are used to distinguish similar objects, rather than to describe or indicate a specific order or sequence. The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0019] like Figures 1 to 6 As shown, the precious metal high vacuum induction continuous casting furnace involved in the present application includes a continuous casting furnace body, and the continuous casting furnace body includes a base 1, a support frame 2 is fixed to the upper surface of the base 1, and a vacuum tank 3 is installed on the support frame 2. The vacuum tank 3 is provided with a vacuum extraction interface 301 and an observation window 302. The vacuum extraction interface 301 is connected to an external vacuum extraction device, so that the cavity 303 of the vacuum tank 3 can be vacuumed, and the situation in the cavity 303 of the vacuum tank 3 can be observed through the observation window 302; the shell 4 is fixed to the vacuum tank 3 through a plurality of connecting columns 9, and the shell 4 is located above the vacuum tank 3. An induction coil 5 is provided inside the shell 4, and the induction coil 5 is controlled by a control box 6. The power of the induction coil 5 can be changed by the control of the control box 6 to realize the heating function. The control box 6 is arranged on the support frame 2. Specifically, the control box 6 can adopt a known device in the prior art, which is not the focus of protection of the present application and is not further described here.

[0020] A quartz cover 7 is provided in the housing 4. The quartz cover 7 penetrates the housing 4 in the up-down direction. The upper end of the quartz cover 7 is located above the housing 4, and the lower end of the quartz cover 7 is located below the housing 4. The induction coil 5 surrounds the outer side of the quartz cover 7. An upper cover 8 is provided at the upper end of the quartz cover 7. A first L-shaped sealing gasket 10 is fixedly provided in the upper cover 8. The upper end surface of the quartz cover 7 contacts the first L-shaped sealing gasket 10 to achieve sealing of the upper end of the quartz cover 7.

[0021] Two water cooling jackets are provided between the lower surface of the shell 4 and the upper surface of the vacuum tank 3, which are respectively referred to as a first water cooling jacket 11 and a second water cooling jacket 13, wherein the first water cooling jacket 11 is located at the bottom and is fixed on the vacuum tank 3, and the second water cooling jacket 13 is arranged on the first water cooling jacket 11, and the lower end of the quartz cover 7 is located in the first water cooling jacket 11, and a second L-shaped sealing gasket 12 is fixedly provided in the first water cooling jacket 11, and the lower end surface of the quartz cover 7 contacts with the second L-shaped sealing gasket 12 to achieve sealing of the lower end of the quartz cover 7.

[0022] In order to obtain a high vacuum degree and prevent the quartz cover 7 from shaking, two stepper motors are arranged at intervals on the vacuum tank 3 of the continuous casting furnace body, which are respectively recorded as the first stepper motor 18 and the second stepper motor 19. The first stepper motor 18 can drive the first lifting screw 16 to rotate, and the second stepper motor 19 can drive the second lifting screw 17 to rotate. The first lifting screw 16 and the second lifting screw 17 are respectively matched with two threaded holes provided on the pressing plate 15. When the first stepper motor 18 and the second stepper motor 19 are driven to operate, the pressing plate 15 can be raised or lowered. When the pressing plate 15 is lowered, the O-ring 14 provided at the second cold water jacket 13 can be squeezed. At this time, the O-ring 14 is radially deformed and contacts the outer side of the quartz cover 7, so as to achieve the function of clamping and sealing the quartz cover 7, and also play a fixing role. When the pressing plate 15 rises, the O-ring 14 returns to its original state under the action of its own elastic deformation and leaves the quartz cover 7.

[0023] The precious metal high vacuum induction continuous casting furnace also includes a cooling mechanism 22, which is arranged on the base 1. A first cooling channel 1101 is provided in the first cooling water jacket 11, and the first cooling channel 1101 is connected to the cooling mechanism 22. Through the cooling mechanism 22, cold water can continuously flow in the first cooling channel 1101, so as to cool the second L-shaped sealing gasket 12; a second cooling channel 1301 is provided in the second cooling water jacket 13, and the second cooling channel 1301 is connected to the cooling mechanism 22. Through the cooling mechanism 22, cold water can continuously flow in the second cooling channel 1301, so as to cool the O-ring 14.

[0024] The cooling mechanism 22 involved in the present application may adopt known equipment in the prior art, which is not the focus of protection of the present application, as long as the corresponding function can be achieved.

[0025] The crucible 20, crystallizer 21, traction mechanism, winding mechanism and other structures in the precious metal high vacuum induction continuous casting furnace involved in this application are not the focus of protection of this application, are the same as the structures in the prior art, and are not further described here.

[0026] The precious metal high vacuum induction continuous casting furnace involved in the present application adopts L-shaped sealing gaskets for sealing the upper and lower end surfaces of the quartz cover, which can not only ensure the sealing of the end surface of the quartz cover, but also ensure its radial positioning, avoiding the need to align the quartz cover every time it is placed; the precious metal high vacuum induction continuous casting furnace involved in the present application can further strengthen the sealing of the quartz cover, and can effectively prevent the quartz cover from shaking, so that the sealing of the precious metal high vacuum induction continuous casting furnace is better, ensuring a high vacuum environment, and the vacuum degree of the precious metal high vacuum induction continuous casting furnace involved in the present application can reach 3.0×10 -3 .

[0027] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A noble metal high vacuum induction continuous casting furnace, comprising a continuous casting furnace body, characterized in that: Two stepper motors are arranged at intervals on the vacuum tank of the continuous casting furnace body, which are respectively recorded as the first stepper motor and the second stepper motor. The first stepper motor can drive the first lifting screw to rotate, and the second stepper motor can drive the second lifting screw to rotate. The first lifting screw and the second lifting screw are respectively matched with two threaded holes arranged on the pressure plate. When the first stepper motor and the second stepper motor are driven to operate, the pressure plate can be raised or lowered. When the pressure plate is lowered, the O-ring arranged at the second cold water jacket can be squeezed. At this time, the O-ring produces radial deformation and contacts with the outer side surface of the quartz cover in the continuous casting furnace body, so as to clamp and seal the quartz cover, and also play a fixing role; when the pressure plate rises, the O-ring returns to its original state under the action of its own elastic deformation and leaves the quartz cover; the second cold water jacket is arranged on the first cold water jacket, and the first cold water jacket is located below, which is fixed on the vacuum tank.

2. The noble metal high vacuum induction continuous casting furnace according to claim 1, characterized in that: A first L-shaped sealing gasket is fixedly provided in the upper cover of the continuous casting furnace body, and the upper end surface of the quartz cover contacts the first L-shaped sealing gasket to achieve sealing of the upper end of the quartz cover.

3. The noble metal high vacuum induction continuous casting furnace according to claim 2, characterized in that: The lower end of the quartz cover is located in the first cold water jacket, a second L-shaped sealing gasket is fixedly arranged in the first cold water jacket, and the lower end surface of the quartz cover contacts the second L-shaped sealing gasket to achieve sealing of the lower end of the quartz cover.

4. The noble metal high vacuum induction continuous casting furnace according to claim 1, characterized in that: It also includes a cooling mechanism, in which a second cooling channel is provided in the second cooling water jacket, and the second cooling channel is connected to the cooling mechanism. The cooling mechanism enables cold water to continuously flow in the second cooling channel so as to cool the O-ring.

Images