Resistance furnace for heating precious metal alloy ingot

Abstract

The utility model discloses a resistance furnace for heating a precious metal alloy ingot, which comprises a furnace body and a furnace door hinged to the furnace body, the furnace body is provided with a furnace chamber, the resistance furnace further comprises a protection assembly arranged on the furnace door and used for reducing the oxidation risk in the heating process of the precious metal alloy ingot, and the protection assembly comprises a protection pipe fixedly connected to the furnace door. One end of the protection pipe is arranged opposite to the furnace chamber, the end, away from the furnace chamber, of the protection pipe is connected with a mounting pipe through a connecting assembly, the side wall of the mounting pipe is fixedly connected with a connecting pipe, and the end, away from the mounting pipe, of the connecting pipe is detachably connected with a gas tank. According to the utility model, through the arrangement of the protection assembly, a layer of protection atmosphere is formed in the furnace chamber by using inert gas, precious metal is wrapped in the protection atmosphere, and the layer of protection atmosphere can isolate oxidizing gases such as oxygen and the like, so that the precious metal is prevented from being eroded.

Description

Technical Field

[0001] The utility model relates to the technical field of precious metal alloy ingot heating equipment, in particular to a resistance furnace for heating precious metal alloy ingots. Background Art

[0002] When using a resistance furnace to heat a precious metal alloy ingot, first place the precious metal alloy ingot in a crucible, then place the crucible in a heating chamber in the resistance furnace, and finally close the furnace door and start the heating element to heat the precious metal alloy ingot in the crucible.

[0003] The resistance furnace uses the resistance wire to generate heat through electric current, and transfers the heat to the material in the furnace to heat it to the required temperature. During this process, the temperature in the furnace will increase significantly. At the same time, due to the opening and closing of the furnace door, there will be a certain atmosphere in the furnace cavity. These atmospheres often contain oxygen. As the temperature rises, the atomic or molecular activity on the surface of the precious metal placed in the crucible intensifies, making it easier to react with oxygen in the air. In particular, when the temperature reaches the oxidation temperature of the precious metal alloy ingot, the oxidation reaction will be significantly accelerated. The precious metal alloy ingot that is oxidized during the heating process will have its surface discolored and have defects such as spots and rust. These appearance defects not only affect the appearance, but also reduce the market value of the product.

[0004] Therefore, a resistance furnace for heating precious metal alloy ingots is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a resistance furnace for heating precious metal alloy ingots, so as to solve the problem of oxidation of precious metal alloy ingots during heating proposed in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a resistance furnace for heating precious metal alloy ingots, comprising a furnace body and a furnace door hinged to the furnace body, the furnace body being provided with a furnace cavity, and further comprising a protective component disposed on the furnace door for reducing the risk of oxidation during the heating process of the precious metal alloy ingots;

[0007] The protection assembly includes a protection tube fixedly connected to the furnace door, one end of the protection tube is arranged opposite to the furnace cavity, the end of the protection tube away from the furnace cavity is connected to the mounting tube via a connecting assembly, the side wall of the mounting tube is fixedly connected to a connecting tube, the end of the connecting tube away from the mounting tube is detachably connected to a gas tank, inert gas is stored in the gas tank, and the mounting tube is provided with a driving assembly for driving the inert gas in the gas tank.

[0008] One-way valves are provided in the protection pipe and the connecting pipe.

[0009] The one-way valve is connected from the inside of the gas tank to the furnace cavity.

[0010] The connecting assembly includes a threaded groove formed on the inner wall of one end of the protection tube away from the furnace chamber, the threaded groove is threadedly connected to a threaded pipe, and one end of the threaded pipe is connected to the mounting pipe.

[0011] The driving assembly includes a T-shaped rod slidably connected to one end of the mounting tube away from the threaded tube, and one end of the T-shaped rod located inside the mounting tube is fixedly connected to a driving plate, and a side wall of the driving plate is sleeved with a rubber ring.

[0012] The side wall of the T-shaped rod located inside the mounting tube is sleeved with a spring, and the two ends of the spring are respectively connected to the inner wall of the mounting tube and the driving plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model, through the setting of the protective component, pushes the inert gas into the furnace cavity under the driving action of the driving component, thereby utilizing the inert gas to form a protective atmosphere in the furnace cavity, wrapping the precious metal therein. This protective atmosphere can isolate oxidizing gases such as oxygen, prevent the corrosion of the precious metal, thereby reducing the risk of oxidation of the precious metal during the heating process, thereby further ensuring the stability and heating quality of the precious metal during the heating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the furnace cavity structure of the present utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the connection component of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the drive assembly of the present utility model.

[0019] In the figure: 101, furnace body; 102, furnace door; 103, furnace chamber; 201, protective tube; 202, mounting tube; 203, connecting tube; 204, gas tank; 3, one-way valve; 401, threaded groove; 402, threaded tube; 501, T-bar; 502, drive plate; 6, spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1

[0022] See also Figure 1-Figure 4 The illustrated resistance furnace for heating precious metal alloy ingots comprises a furnace body 101 and a furnace door 102 hinged to the furnace body 101 . The furnace body 101 is provided with a furnace cavity 103 . The furnace door 102 also comprises a protective component for reducing the risk of oxidation during the heating of the precious metal alloy ingots.

[0023] The protection assembly includes a protection tube 201 fixedly connected to the furnace door 102. One end of the protection tube 201 is arranged opposite to the furnace chamber 103. The end of the protection tube 201 away from the furnace chamber 103 is connected to the mounting tube 202 via a connecting assembly. The side wall of the mounting tube 202 is fixedly connected to the connecting tube 203. The end of the connecting tube 203 away from the mounting tube 202 is detachably connected to a gas tank 204. The gas tank 204 stores inert gas. The mounting tube 202 is provided with a driving assembly for driving the inert gas in the gas tank 204.

[0024] It should be noted here that: through the setting of the protective component, under the driving action of the driving component, the inert gas is pushed into the furnace chamber 103, so that a layer of protective atmosphere is formed in the furnace chamber 103 by utilizing the inert gas, and the precious metal is wrapped therein. This layer of protective atmosphere can isolate oxidizing gases such as oxygen, prevent corrosion of the precious metal, thereby reducing the risk of oxidation of the precious metal during the heating process, thereby further ensuring the stability and heating quality of the precious metal during the heating process.

[0025] It is worth noting that: as an existing technology, the specific structure and working principle of the resistance furnace have been mastered by people in this field and will not be elaborated here.

[0026] See also Figure 3 and Figure 4 , a one-way valve 3 is provided in both the protection pipe 201 and the connecting pipe 203 shown in the figure;

[0027] It should be noted that the one-way valve 3 is provided to facilitate the inert gas to enter the furnace chamber 103 in a one-way manner.

[0028] See also Figure 3 and Figure 4 , the conducting direction of the one-way valve 3 in the figure is from the inside of the gas tank 204 to the furnace chamber 103;

[0029] It should be noted that the inert gas can enter the furnace chamber 103 easily by limiting the conduction direction of the one-way valve 3 .

[0030] See also Figure 3 and Figure 4 The connecting assembly shown in the figure includes a threaded groove 401 formed on the inner wall of the end of the protection tube 201 away from the furnace chamber 103, the threaded groove 401 is threadedly connected to a threaded tube 402, and one end of the threaded tube 402 is connected to the mounting tube 202;

[0031] It should be noted here that the provision of the connection assembly facilitates the connection and disassembly between the installation tube 202 and the protection tube 201 .

[0032] Working Principle: When using the furnace body 101 to heat the precious metal alloy ingot, first place the precious metal alloy ingot into the crucible, then place the crucible into the furnace chamber 103, and close the furnace door 102. Finally, the furnace body 101 is energized. The current generates heat through the resistance wire, which is transferred to the material in the furnace to heat it to the required temperature.

[0033] In the process of heating the precious metal alloy ingot, the installation tube 202 is connected to the protective tube 201 through the connecting assembly, and then the gas tank 204 is installed on the connecting tube 203. After the gas tank 204 is installed, the driving assembly is used to push the inert gas in the gas tank 204 into the furnace chamber 103, so that a layer of protective atmosphere is formed in the furnace using the inert gas to wrap the precious metal therein. This layer of protective atmosphere can isolate oxidizing gases such as oxygen to prevent corrosion of the precious metal, thereby reducing the risk of oxidation of the precious metal during the heating process, thereby further ensuring the stability and heating quality of the precious metal during the heating process.

[0034] Example 2

[0035] See also Figure 4 This embodiment further illustrates Example 1. The driving assembly shown in the figure includes a T-shaped rod 501 slidably connected to the end of the mounting tube 202 away from the threaded tube 402. The end of the T-shaped rod 501 located inside the mounting tube 202 is fixedly connected to a driving plate 502. The side wall of the driving plate 502 is provided with a rubber ring.

[0036] It should be noted here that: through the arrangement of the driving assembly, in the process of pulling the T-shaped rod 501 away from the furnace door 102, the driving plate 502 is driven to move synchronously in the installation pipe 202, so that under the action of the movement of the driving plate 502, the inert gas in the gas tank 204 will be drawn into the installation pipe 202 from the connecting pipe 203 under the action of the air pressure difference and the one-way blocking action of the two one-way valves 3. After the driving plate 502 is moved to the extreme position, the pulling of the T-shaped rod 501 is released. At this time, under the elastic action of the spring 6, the driving plate 502 moves in the installation pipe 202 close to the furnace door 102, so that under the driving force of the air pressure and the one-way blocking action of the two one-way valves 3, the inert gas in the installation pipe 202 will be pushed into the furnace chamber 103 through the protective pipe 201;

[0037] Therefore, during the reciprocating pulling of the T-bar 501 , the inert gas in the gas tank 204 will be reciprocatingly pushed into the furnace chamber 103 under the pulling force and the elastic action of the spring 6 , utilizing the air pressure driving force and the one-way blocking action of the two one-way valves 3 .

[0038] See also Figure 4 , the T-shaped rod 501 shown in the figure is located on the side wall of the mounting tube 202 and is provided with a spring 6, and the two ends of the spring 6 are respectively connected to the inner wall of the mounting tube 202 and the driving plate 502;

[0039] It should be noted that the provision of the spring 6 facilitates the elastic action of the spring 6 to drive the driving plate 502 to reset.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A resistance furnace for heating precious metal alloy ingots, comprising: A furnace body (101) and a furnace door (102) hinged to the furnace body (101), wherein the furnace body (101) is provided with a furnace cavity (103); It is characterized by further comprising: A protective component provided on the furnace door (102) for reducing the risk of oxidation during the heating process of the precious metal alloy ingot; The protection assembly comprises a protection tube (201) fixedly connected to the furnace door (102); one end of the protection tube (201) is arranged opposite to the furnace cavity (103); the end of the protection tube (201) away from the furnace cavity (103) is connected to the mounting tube (202) via a connection assembly; the side wall of the mounting tube (202) is fixedly connected to the connecting tube (203); the end of the connecting tube (203) away from the mounting tube (202) is detachably connected to a gas tank (204); inert gas is stored in the gas tank (204); and the mounting tube (202) is provided with a driving assembly for driving the inert gas in the gas tank (204).

2. The resistance furnace for heating precious metal alloy ingots according to claim 1, characterized in that: One-way valves (3) are provided in both the protection pipe (201) and the connecting pipe (203).

3. The resistance furnace for heating precious metal alloy ingots according to claim 2, characterized in that: The conducting direction of the one-way valve (3) is from the interior of the gas tank (204) to the furnace chamber (103).

4. The resistance furnace for heating precious metal alloy ingots according to claim 1, characterized in that: The connection assembly comprises a threaded groove (401) formed on the inner wall of one end of the protection tube (201) away from the furnace chamber (103); the threaded groove (401) is threadedly connected to a threaded tube (402); one end of the threaded tube (402) is connected to the mounting tube (202).

5. The resistance furnace for heating precious metal alloy ingots according to claim 4, characterized in that: The driving assembly comprises a T-shaped rod (501) slidably connected to one end of the mounting tube (202) away from the threaded tube (402); one end of the T-shaped rod (501) located inside the mounting tube (202) is fixedly connected to a driving plate (502); and a side wall of the driving plate (502) is sleeved with a rubber ring.

6. The resistance furnace for heating precious metal alloy ingots according to claim 5, characterized in that: The side wall of the T-shaped rod (501) located inside the mounting tube (202) is sleeved with a spring (6), and the two ends of the spring (6) are respectively connected to the inner wall of the mounting tube (202) and the driving plate (502).

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