LIQUID DISCHARGE DEVICE AND Crucible

Abstract

The utility model discloses a liquid discharging device and a crucible. The liquid discharging device comprises a pot cover, an air inlet pipe and a liquid discharging pipe. The pot cover is provided with an air inlet. One end of the air inlet pipe is connected with the pot cover and communicated with the air inlet. When the pot cover blocks the upper port of the pot body, the air inlet is communicated with the inner cavity of the pot body, and the liquid discharge pipe is communicated with the inner cavity of the pot body. The inner cavity of the pot body is filled with nitrogen through the air inlet pipe, so that the air pressure in the pot body is increased, and liquid in the pot body is forced to enter the liquid discharge pipe and then is discharged to a designated area. The liquid discharging device can prevent workers from directly contacting with high-temperature liquid, avoid accelerated oxidation caused by direct exposure of the surface of molten aluminum in air, avoid severe fluctuation of the liquid level, formation of turbulent flow and further increase of the oxidation area due to damage of an oxidation film on the surface of the molten aluminum caused by manual scooping; meanwhile, residual molten aluminum at the bottom in the crucible can be completely taken out as much as possible, and manual operation missing is avoided; nitrogen is adopted as a pressurizing medium, and explosion caused by reaction with molten aluminum can be avoided due to the inertia characteristic of the nitrogen.

Description

Technical Field

[0001] This utility model relates to the field of crucible technology, and in particular to a liquid discharge device and a crucible. Background Technology

[0002] In the foundry industry, non-tiltable crucible furnaces, due to their compact structure and adaptability to confined installation spaces, hold over 60% of the market share in scenarios such as crucible holding furnaces for large low-pressure casting machines, side furnaces for gravity casting machines, and pit-type melting and holding furnaces. However, when the furnace body or heating system malfunctions, molten aluminum must be manually scooped out for emergency drainage. This is not only inefficient but also poses significant safety risks, such as burns and explosions, as workers directly contact the high-temperature molten metal. Furthermore, traditional manual drainage easily leads to accelerated oxidation of the molten aluminum, increased metal loss, and cannot achieve rapid and directional drainage of molten metal, further restricting production continuity. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a liquid discharge device and a crucible.

[0004] In a first aspect, this utility model provides a liquid discharge device installed on a pot body, the liquid discharge device comprising:

[0005] A pot lid that can be placed on the upper part of the pot body and seal the upper port of the pot body, and the pot lid is provided with an air inlet;

[0006] An air intake pipe, one end of which is connected to the pot lid and communicates with the air intake hole;

[0007] A drain pipe, which passes through the pot lid;

[0008] When the lid seals the upper port of the pot body, the air inlet is connected to the inner cavity of the pot body, and the drain pipe is connected to the inner cavity of the pot body.

[0009] According to some embodiments of the present invention, the upper end of the pot body is provided with a plurality of positioning pins, and the outer peripheral wall of the pot lid is provided with a plurality of notches, and the plurality of positioning pins correspond one-to-one with the plurality of notches; when the positioning pins are inserted into the notches, the pot lid seals the upper port of the pot body.

[0010] According to some embodiments of the present invention, multiple notches are distributed circumferentially along the lid, and when the lid seals the upper port of the pot body, the lid and the pot body are coaxially arranged.

[0011] According to some embodiments of this utility model, the drain pipe is coaxially arranged with the pot lid; when the pot lid seals the upper port of the pot body, the lower end of the drain pipe is located in the inner cavity of the pot body, and there is a gap between the lower end of the drain pipe and the bottom of the pot body.

[0012] According to some embodiments of the present invention, the drain pipe is slidably connected to the pot lid in the up-down direction, the pot lid is provided with a sealing sleeve, the drain pipe passes through the sealing sleeve, and the inner peripheral wall of the sealing sleeve is attached to the outer peripheral wall of the drain pipe.

[0013] According to some embodiments of the present invention, the lower end face of the pot lid is provided with a first annular sealing ring, and when the pot lid seals the upper end of the pot body, the lower side of the first annular sealing ring is in close contact with the upper end face of the pot body.

[0014] According to some embodiments of this utility model, the pot lid is provided with a feeding port, and the upper end of the pot lid is rotatably connected to a flip cover, which can be rotated to block or open the feeding port.

[0015] According to some embodiments of the present invention, the upper end face of the pot lid is provided with a second annular sealing ring, the second annular sealing ring surrounds the feeding port, and when the flip cover blocks the feeding port, the second annular sealing ring is tightly attached to the lower end face of the flip cover.

[0016] According to some embodiments of the present invention, the liquid discharge device further includes a liquid outlet pipe, the upper end of which is connected to one end of the liquid outlet pipe.

[0017] The liquid discharge device according to the embodiments of this utility model has at least the following technical effects:

[0018] 1. When the lid seals the upper port of the crucible, a closed area is formed inside the crucible. Nitrogen gas is then introduced into the inner cavity of the crucible through the air inlet pipe, increasing the gas pressure inside the crucible and forcing the liquid inside to enter the drain pipe and then be discharged to a designated area. This liquid discharge device avoids direct human contact with the high-temperature liquid, prevents the aluminum liquid surface from being directly exposed to air and accelerating oxidation, and avoids damage to the oxide film on the aluminum liquid surface caused by manual scooping, which would lead to violent fluctuations in the liquid surface, forming turbulence and further increasing the oxidation area. At the same time, it can remove as much of the remaining aluminum liquid at the bottom of the crucible as possible, avoiding omissions due to manual operation.

[0019] 2. Nitrogen is used as the pressurizing medium, and its inert properties can prevent it from reacting with the molten aluminum and causing an explosion.

[0020] 3. When the crucible temperature preservation function fails or a casting failure occurs, the liquid can be automatically discharged through control signal information.

[0021] Secondly, the present invention also provides a crucible, including a liquid discharge device according to the first aspect embodiment of the present invention described above.

[0022] The crucible according to this utility model embodiment has at least the following technical effects: When the crucible uses this liquid discharge device, and the lid seals the upper port of the crucible body, a closed area is formed inside the crucible. Nitrogen gas is introduced into the inner cavity of the crucible through the air inlet pipe, increasing the gas pressure inside the crucible and forcing the liquid inside the crucible into the drain pipe and then discharged to a designated area. This liquid discharge device avoids direct human contact with the high-temperature liquid, prevents the aluminum liquid surface from being directly exposed to air and accelerating oxidation, and avoids damage to the oxide film on the aluminum liquid surface caused by manual scooping, which would lead to violent fluctuations in the liquid surface, forming turbulence and further increasing the oxidation area. Simultaneously, it can remove as much of the remaining aluminum liquid at the bottom of the crucible as possible, avoiding omissions due to manual operation. When the crucible's temperature preservation function fails or a casting failure occurs, the liquid discharge operation can be automatically performed through control signal information.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the liquid discharge device of some embodiments of the present invention installed on the pot body;

[0026] Figure 2 This is a cross-sectional view of the liquid discharge device of some embodiments of the present invention installed on the pot body;

[0027] Figure 3 This is a schematic diagram of the structure of a liquid discharge device according to some embodiments of the present invention;

[0028] Figure 4 This is a schematic diagram of the liquid discharge device of some embodiments of the present invention from another angle.

[0029] Icon labels:

[0030] Pot body 100; pot lid 110; air inlet 111; positioning pin 121; notch 122; sealing sleeve 130; feeding port 140; flip cover 150; first annular sealing ring 161; second annular sealing ring 162;

[0031] Air inlet pipe 200; liquid outlet pipe 210; liquid discharge pipe 220. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0037] According to some embodiments of this utility model, refer to Figures 1 to 4 A liquid discharge device is installed on the pot body 100, which has an upper port. The liquid discharge device includes a pot lid 110, an air inlet pipe 200, and a drain pipe 210. The pot lid 110 can be placed on the upper end of the pot body 100 and seals the upper port of the pot body 100. The pot lid 110 has an air inlet 111, which extends vertically and passes through the upper and lower end faces of the pot lid 110. One end of the air inlet pipe 200 is connected to the pot lid 110 and communicates with the upper port of the air inlet 111. The drain pipe 210 passes through the pot lid 110. When the pot lid 110 seals the upper port of the pot body 100, the air inlet 111 communicates with the inner cavity of the pot body 100, and the lower end of the drain pipe 210 is located inside the pot body 100, with the lower port of the drain pipe 210 communicating with the inner cavity of the pot body 100.

[0038] Understandably, when the lid 110 seals the upper port of the pot body 100, a closed area is formed inside the pot body 100. Nitrogen gas is introduced into the inner cavity of the pot body 100 through the air inlet pipe 200. As the nitrogen gas gradually fills the pot body 100, the gas pressure inside the pot body 100 increases. The nitrogen gas exerts pressure on the liquid surface from top to bottom, forcing the liquid inside the pot body 100 to enter the drain pipe 210 through the lower port and then be discharged to the designated area.

[0039] This liquid discharge device avoids direct human contact with the high-temperature molten metal. Traditional manual scooping requires operators to be in close contact with molten aluminum at 600-750°C, posing a serious risk of burns. This embodiment utilizes a closed-loop flow system, allowing the molten aluminum to be discharged through the drain pipe 210, thus achieving directional flow of the melt and eliminating the need for operators to enter high-risk areas. Simultaneously, it can remove as much remaining molten aluminum as possible from the bottom of the crucible, preventing omissions during manual operation. When the crucible's temperature maintenance function fails or a casting malfunction occurs, the liquid discharge operation can be automatically initiated via control signals.

[0040] Furthermore, using nitrogen as the pressurizing medium, its inert properties can suppress the reaction of molten aluminum with oxygen to generate explosive hydrogen gas. Preferably, the inlet pipe 200 is equipped with a filtration system, which includes a first-stage filter element, a second-stage filter element, and a third-stage filter element. Nitrogen gas passes through the first-stage filter element, the second-stage filter element, and the third-stage filter element sequentially. The first-stage filter element is a sintered metal filter element or a polypropylene melt-blown filter element, with a filtration accuracy of 1-5 micrometers, used to intercept large particles such as sand and rust carried in the gas, and to separate liquid water droplets. The second-stage filter element is a glass fiber pleated filter element or a PTFE membrane filter element, with a filtration accuracy improved to 0.01-0.1 micrometers, used to remove aerosols, oil mist, and submicron-sized particles. The third-stage filter element consists of an activated carbon adsorption layer and an ultra-fine filter, used to adsorb residual hydrocarbons and odors, and to capture nano-sized particles. Nitrogen gas enters the pot body 100 after passing through the filtration system, eliminating the risk of impurities mixing into the pot body 100.

[0041] In addition, the technical solution of this embodiment can drive the aluminum liquid to be discharged at a flow rate of ≥1.5m / s (below the critical value of turbulence). The emptying time of 10 tons of aluminum liquid is reduced from 2-3 hours manually to 15-20 minutes, avoiding the aluminum liquid surface from being directly exposed to the air and accelerating oxidation; avoiding manual scooping which would damage the oxide film on the surface of the aluminum liquid, causing violent fluctuations in the liquid surface, forming turbulence, and further increasing the oxidation area.

[0042] Preferably, in emergency aluminum molten liquid drainage scenarios, the system achieves full-process automation through a PLC-integrated nitrogen pressure control module: First, the liquid level sensor and temperature sensor monitor the crucible status in real time. When a fault signal is triggered, the PLC immediately starts the PSA nitrogen generator to inject 0.4-0.6MPa nitrogen into the pot body 100 through the air inlet pipe 200, driving the aluminum molten liquid to be discharged directionally into the drain pipe 210 at a laminar flow velocity of 1.2-1.5m / s. During the process, the pressure transmitter and oxygen content analyzer continuously provide data feedback. The PLC dynamically adjusts the proportional valve opening and nitrogen flow rate through a fuzzy PID algorithm to suppress the oxidation loss rate to below 0.15%. If pressure over-limit or pipeline blockage is detected, the two-stage pressure relief valve is interlocked and an audible and visual alarm is triggered. No manual intervention is required throughout the process. 10 tons of aluminum molten liquid can be safely drained within 18 minutes, with a metal recovery rate of ≥95%.

[0043] According to some embodiments of this utility model, refer to Figures 1 to 3 The upper end of the pot body 100 is provided with multiple positioning pins 121, and the outer peripheral wall of the pot lid 110 is provided with multiple notches 122. Each positioning pin 121 corresponds to one of the multiple notches 122. When a positioning pin 121 is inserted into a notch 122, the pot lid 110 seals the upper end of the pot body 100. The multiple notches 122 are distributed circumferentially along the pot lid 110. When the pot lid 110 seals the upper end of the pot body 100, the pot lid 110 and the pot body 100 are coaxially aligned. The cooperation of the positioning pins 121 and the notches 122 allows for quick assembly of the pot body 100 and the pot lid 110, facilitating responses to unexpected situations.

[0044] According to some embodiments of this utility model, refer to Figure 2 The drain pipe 210 is coaxially arranged with the pot lid 110. When the pot lid 110 seals the upper port of the pot body 100, the lower end of the drain pipe 210 is located in the inner cavity of the pot body 100, and there is a gap between the lower end of the drain pipe 210 and the bottom of the pot body 100. The lower end of the drain pipe 210 is inserted into the molten aluminum. When nitrogen enters the pot body 100, the nitrogen exerts a downward force on the surface of the molten aluminum in the pot body 100, the surface of the molten aluminum decreases, and the molten aluminum enters the drain pipe 210 through the lower port and is discharged to the designated position.

[0045] Understandably, nitrogen, as an inert gas, can effectively isolate molten aluminum from oxygen, reducing the oxidation loss rate from 0.5%-1.2% with traditional manual drainage to ≤0.15%. Its mechanism of action is manifested in: 1. Physical isolation: Nitrogen gas at a pressure ≥0.4MPa forms a gaseous barrier, preventing the exposure of fresh metal after the oxide film on the surface of the molten aluminum breaks down. 2. Chemical inertness: Nitrogen gas has no side reactions with molten aluminum (below 1300℃), avoiding the formation of impurities such as AlN. 3. Temperature control: The closed-loop drainage pipe can be used with a ceramic lining (temperature resistance >1000℃) to maintain the temperature fluctuation of the molten aluminum ≤±5℃, preventing overheating and oxidation; that is, the inner wall of the drainage pipe 210 is equipped with a ceramic inner layer.

[0046] According to some embodiments of this utility model, refer to Figure 2 The drain pipe 210 is slidably connected to the pot lid 110 in the vertical direction. The pot lid 110 is provided with a sealing sleeve 130, and the drain pipe 210 passes through the sealing sleeve 130. The inner peripheral wall of the sealing sleeve 130 is in contact with the outer peripheral wall of the drain pipe 210. It can be understood that the drain pipe 210 can move in the vertical direction, thereby adjusting the distance between the lower end of the drain pipe 210 and the bottom of the pot body 100, so as to adapt to crucibles of different depths and improve versatility. The sealing sleeve 130 is used to improve the sealing between the drain pipe 210 and the pot lid 110, preventing molten aluminum or gas from flowing out through the gap between the outer peripheral wall of the drain pipe 210 and the pot lid 110.

[0047] According to some embodiments of this utility model, refer to Figure 2 and Figure 4 The lower end face of the pot lid 110 is provided with a first annular sealing ring 161. When the pot lid 110 seals the upper end of the pot body 100, the lower side of the first annular sealing ring 161 is in close contact with the upper end face of the pot body 100. The first annular sealing ring 161 can improve the sealing between the pot lid 110 and the pot body 100, and prevent molten aluminum or gas from flowing out through the gap between the pot lid 110 and the pot body 100.

[0048] According to some embodiments of this utility model, refer to Figure 1 and Figure 3 The lid 110 is provided with a feeding port 140, and the upper end of the lid 110 is rotatably connected to a flip cover 150. The flip cover 150 can be rotated to block or open the feeding port 140. Through the feeding port 140, materials can be fed into the crucible or the internal condition of the crucible can be observed.

[0049] According to some embodiments of this utility model, a second annular sealing ring 162 is provided on the upper end face of the pot lid 110. The second annular sealing ring 162 surrounds the feeding port 140. When the flip cover 150 blocks the feeding port 140, the second annular sealing ring 162 is tightly attached to the lower end face of the flip cover 150. The second annular sealing ring 162 can improve the sealing performance between the flip cover 150 and the pot lid 110, preventing molten aluminum or gas from flowing out through the gap between the flip cover 150 and the pot lid 110.

[0050] According to some embodiments of the present invention, the liquid discharge device further includes a liquid outlet pipe 220, the upper end of the liquid outlet pipe 210 is connected to one end of the liquid outlet pipe 220, and the liquid outlet pipe 220 can receive the aluminum liquid in the liquid outlet pipe 210 and transport it to a designated area.

[0051] In this specification, the reference to the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A liquid discharge device, installed on a pot body (100), characterized in that, The liquid discharge device includes: A pot lid (110) is placed on the upper end of the pot body (100) and blocks the upper port of the pot body (100). The pot lid (110) is provided with an air inlet (111). An air inlet pipe (200) is provided, one end of which is connected to the pot lid (110) and communicates with the air inlet hole (111). A drain pipe (210) is provided through the pot lid (110); When the lid (110) blocks the upper port of the pot body (100), the air inlet (111) is connected to the inner cavity of the pot body (100), and the drain pipe (210) is connected to the inner cavity of the pot body (100).

2. The liquid discharge device according to claim 1, characterized in that, The upper end of the pot body (100) is provided with a plurality of positioning pins (121), and the outer peripheral wall of the pot lid (110) is provided with a plurality of notches (122). The plurality of positioning pins (121) and the plurality of notches (122) correspond one-to-one. When the positioning pin (121) is inserted into the notch (122), the pot lid (110) blocks the upper port of the pot body (100).

3. The liquid discharge device according to claim 2, characterized in that, Multiple notches (122) are distributed circumferentially along the lid (110). When the lid (110) blocks the upper port of the pot body (100), the lid (110) and the pot body (100) are coaxially arranged.

4. The liquid discharge device according to claim 1, characterized in that, The drain pipe (210) is coaxially arranged with the pot lid (110); when the pot lid (110) blocks the upper port of the pot body (100), the lower end of the drain pipe (210) is located in the inner cavity of the pot body (100), and there is a gap between the lower end of the drain pipe (210) and the bottom of the pot body (100).

5. The liquid discharge device according to claim 1, characterized in that, The drain pipe (210) is slidably connected to the pot lid (110) in the up-down direction. The pot lid (110) is provided with a sealing sleeve (130). The drain pipe (210) passes through the sealing sleeve (130). The inner peripheral wall of the sealing sleeve (130) is attached to the outer peripheral wall of the drain pipe (210).

6. The liquid discharge device according to claim 1, characterized in that, The lower end face of the pot lid (110) is provided with a first annular sealing ring (161). When the pot lid (110) seals the upper port of the pot body (100), the lower side of the first annular sealing ring (161) is in close contact with the upper end face of the pot body (100).

7. The liquid discharge device according to claim 1, characterized in that, The pot lid (110) is provided with a feeding port (140), and the upper end of the pot lid (110) is rotatably connected to a flip cover (150). The flip cover (150) can be rotated to block or open the feeding port (140).

8. The liquid discharge device according to claim 7, characterized in that, The upper surface of the pot lid (110) is provided with a second annular sealing ring (162), which surrounds the feeding port (140). When the flip cover (150) blocks the feeding port (140), the second annular sealing ring (162) is tightly attached to the lower surface of the flip cover (150).

9. The liquid discharge device according to claim 1, characterized in that, The liquid discharge device further includes a liquid outlet pipe (220), the upper end of which is connected to one end of the liquid outlet pipe (220).

10. A crucible, characterized in that, It includes a liquid discharge device as described in any one of claims 1 to 9.

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