Precise air supply pressurizing device of air pressure type pouring furnace

Abstract

The utility model discloses a precise air supply pressurizing device of an air pressure type pouring furnace, which comprises an air inlet source connector connected with one end of a pretreatment pipeline, the other end of the pretreatment pipeline is connected with the inlet end of a proportional valve through a hose, and the outlet end of the proportional valve is connected with the inlet end of a soup injection valve through a hose. A plurality of branch outlet ends of the soup injection valve are respectively connected with a booster through a hose, the booster is connected with an inlet end of an air source drying treatment pipeline through a boosting combining pipe, and an outlet end of the air source drying treatment pipeline is connected with an air inlet pipeline of the casting machine through an air outlet source joint; the proportional valve, the soup injection valve and the voltage booster are electrically connected with the PLC control electric box. When the device is used, an air inlet source with stable pressure boosting can be conveyed into the casting machine, so that stable pressure boosting control is carried out on the metal liquid level in the casting machine, the liquid outlet amount of the metal liquid during casting is controlled, the metal liquid in a furnace can be more stable, fluctuation of the metal liquid is reduced, and the service life of a furnace lining is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of gas supply control technology for casting furnaces, specifically to a precise gas supply and pressurization device for a pneumatic casting furnace. Background Technology

[0002] A casting furnace is used to pour or press molten metal from the furnace body into a mold, and the desired casting is made by shaping and size the mold. During the pouring process, the molten metal flows through channels or troughs in the furnace body into the mold, fills the cavity of the mold, and then cools and solidifies to form the desired casting.

[0003] In the existing technology, the molten metal surface will shake and scour the inner wall of the casting furnace cavity during the injection process, resulting in poor stability of the rated molten metal surface in the casting furnace cavity, which cannot guarantee the casting accuracy and speed. Utility Model Content

[0004] The purpose of this invention is to provide a precise gas supply and pressurization device for a pneumatic casting furnace to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A precision gas supply and pressurization device for a pneumatic casting furnace includes an air inlet connector connected to one end of a pretreatment pipeline, the other end of the pretreatment pipeline being connected to the inlet of a proportional valve via a hose, the outlet of the proportional valve being connected to the inlet of a slurry injection valve via a hose, multiple branch outlets of the slurry injection valve being connected to a pressure booster via hoses, the pressure booster being connected to the inlet of a gas source drying pipeline via a pressure boosting and combining pipe, and the outlet of the gas source drying pipeline being connected to the air inlet pipeline of the casting machine via an air outlet connector.

[0007] The proportional valve, the soup injection valve, and the booster are all electrically connected to the PLC control box.

[0008] As a further embodiment of this utility model: a pressure sensor electrically connected to the PLC control box is provided on the booster circuit pipe.

[0009] As a further embodiment of this utility model: the booster combining pipe includes an upper booster combining pipe and a lower booster combining pipe, the upper booster combining pipe is connected to the outlet end of the booster through a branch pipe, and the lower booster combining pipe is connected to the inlet end of the booster through a branch pipe.

[0010] As a further embodiment of this utility model: the upper pressure boosting and combining pipe is used to connect to the inlet end of the gas source drying and processing pipeline, and the gas source drying and processing pipeline is provided with at least one drying processor.

[0011] As a further embodiment of this utility model: the lower booster pipe is used to connect to the outlet end of the pressure relief valve, the inlet end of the pressure relief valve is connected to the air intake connector through the air intake pipe, and the pressure relief valve is used to electrically connect to the PLC control box.

[0012] As a further embodiment of this utility model, a silencing device is provided on one side of the pressure relief valve.

[0013] As a further embodiment of this utility model, the gas source drying pipeline is also equipped with a casting exhaust valve.

[0014] As a further embodiment of this utility model: an oil mist separator and a regulator are sequentially provided in the gas delivery direction of the pretreatment pipeline.

[0015] As a further embodiment of this invention, the regulator is a pressure reducing valve.

[0016] As a further embodiment of this invention, the booster is a gas booster or an air booster pump.

[0017] The beneficial effects of this utility model are:

[0018] (1) When in use, the air source is de-oiled or water misted and depressurized during the transportation process in the pretreatment pipeline. After pretreatment, it is transported to the proportional valve for pressure regulation, so that the pressure-regulated air source enters the booster through the injection valve for compression treatment to obtain a stable air source with increased pressure. This allows it to be transported into the inner cavity of the casting machine through the air inlet pipe, thereby pressurizing and stabilizing the metal liquid surface in the casting machine, thus controlling the amount of metal liquid output during casting. This makes the metal liquid in the furnace more stable, reduces metal liquid fluctuations, reduces furnace lining wear caused by metal liquid scouring the furnace lining, and increases the service life of the furnace lining.

[0019] (2) In this application, the pretreatment management and air source drying pipeline can be used to remove impurities during the air source delivery process, which can prevent oil or water mist from entering the casting machine, ensuring the cleanliness of the air source and thus avoiding the risk of instability of the pneumatic casting machine. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the control principle of this utility model;

[0023] Figure 3 This is a schematic diagram of the application status of this utility model.

[0024] In the diagram: 1. Air inlet connector; 2. Pretreatment pipeline; 3. Proportional valve; 4. PLC control box; 5. Injection valve; 6. Pressure booster; 7. Upper pressure boosting and combining pipeline; 8. Air source drying treatment pipeline; 9. Drying processor; 10. Air outlet connector; 11. Pressure relief valve; 12. Air inlet pipeline; 13. Silencing device; 14. Pressure sensor; 15. Lower pressure boosting and combining pipeline; 16. Oil mist separator; 17. Regulator; 18. Casting exhaust valve; 19. Casting machine. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; in the description of this utility model, "a plurality of" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] Please see Figure 1 and 2 As shown, this utility model is a precision gas supply and pressurization device for a pneumatic casting furnace, including an air inlet connector 1 connected to one end of a pretreatment pipeline 2. The other end of the pretreatment pipeline 2 is connected to the inlet of a proportional valve 3 via a hose. The outlet of the proportional valve 3 is connected to the inlet of a soup-injection valve 5 via a hose. The multiple branch outlets of the soup-injection valve 5 are respectively connected to a booster 6 via hoses. The booster 6 is connected to the inlet of a gas source drying pipeline 8 via a booster combination pipe. The outlet of the gas source drying pipeline 8 is connected to the air inlet of a casting machine 19 via an air outlet connector 10. The proportional valve 3, the soup-injection valve 5, and the booster 6 are all electrically connected to a PLC control box 4.

[0028] During the use of the precision air supply and pressurization device of this application, the air source can be input into the pretreatment pipeline 2 through the air source connector 1. In this embodiment, the air source can be air, nitrogen, or other inert gases. The gas type can be switched, but cannot be mixed simultaneously. The air source undergoes oil or water mist removal and pressure reduction treatment during transportation in the pretreatment pipeline 2. After pretreatment, it is delivered to the proportional valve 3 for pressure regulation, so that the pressure-regulated air source enters the booster 6 through the injection valve 5 for compression treatment, thereby obtaining a stable pressurized air source. A stable air source is supplied to the air source drying treatment pipeline 8 through the pressurization combination pipe, so that it can be degreased or dried with water mist again through the air source drying treatment pipeline 8. This provides a clean and stable pressurized air source, which is then connected to the air source inlet pipe of the casting machine 19 through the air source connector 10. This allows for pressurization and stabilization control of the molten metal surface in the casting machine 19, thereby controlling the amount of molten metal poured out during casting. This makes the molten metal in the furnace more stable, reduces molten metal fluctuations, reduces furnace lining wear caused by molten metal scouring the furnace lining, and increases the service life of the furnace lining.

[0029] In specific implementation methods, such as Figure 3 The diagram shown illustrates the application of the precision air supply and pressurization device of this application. When pressurizing the casting machine 19, the rated molten iron level during pressurization must be lower than the initial rated molten iron level, thus ensuring stable control of the rated molten iron level during pressurization. Specifically, the precision air supply and pressurization device of this application controls the pressurization of the air source entering the casting machine 19, enabling quantitative pouring of molten iron and improving pouring accuracy. It allows for normal pouring operations while feeding materials into the casting furnace, improving production efficiency. Using pneumatic control reduces energy consumption compared to other pouring methods, saving energy. It is applicable to the pouring of various castings, especially suitable for long-term operation and production of relatively single-variety products.

[0030] In a specific embodiment, a pressure sensor 14 electrically connected to the PLC control box 4 is provided on the booster pipe. During the process of the PLC control box 4 regulating the pressure of the proportional valve 3, the data acquired by the weighing system of the casting machine 19 and the pressure sensor 14 in the precision air supply and pressurization device of this application can be fed back to the PLC control box 4. Based on the acquired data, the PLC control box 4 can remotely adjust the output air pressure of the proportional valve 3 through calculation and analysis, thereby achieving precise control of the air source pressure entering the casting machine 19 and improving the casting accuracy.

[0031] It's important to understand that using a PLC control box 4 to remotely control the proportional valve 3 for precise gas volume control has the following advantages: First, the output pressure changes according to the input data signal; second, it offers stepless pressure regulation; third, it provides both remote and programmable control capabilities; and fourth, it has a protection function. Specifically, if insufficient gas supply or excessive output flow occurs during operation, the solenoid valve malfunctions, reducing its lifespan. In this case, the proportional valve 3 enters a "protection state," meaning the solenoid valve pauses its operation and restarts every 10 seconds, repeating this process until sufficient supply pressure or normal output flow is achieved, at which point it exits the "protection state."

[0032] In a specific embodiment, the booster combining pipe includes an upper booster combining pipe 7 and a lower booster combining pipe 15. The upper booster combining pipe 7 is connected to the outlet end of the booster 6 through a branch pipe, and the lower booster combining pipe 15 is connected to the inlet end of the booster 6 through a branch pipe.

[0033] The upper pressure boosting and combining pipe 7 is used to connect to the inlet end of the air source drying treatment pipe 8. The air source drying treatment pipe 8 is equipped with at least one drying processor 9. During the output process of the pressurized air source, it can be dried by the drying processor 9 to prevent oil or water mist from entering the inner cavity of the casting machine 19, thereby avoiding the risk of instability of the pneumatic casting machine 19.

[0034] The lower booster pipe 15 is used to connect to the outlet end of the pressure relief valve 11. The inlet end of the pressure relief valve 11 is connected to the air inlet connector 1 through the air inlet pipe. The pressure relief valve 11 is used to electrically connect to the PLC control box 4. During the boosting and conveying process, a portion of the initial air inlet is diverted to the lower booster pipe 15 and merged with the pressurized air source regulated by the proportional valve 3 in the booster 6. The pressurized air source is then boosted and stably output through the upper booster pipe 7 to meet the flow requirements of the conveyed air source.

[0035] It should be understood that the precision air supply and pressurization device of this application is equipped with a pressure relief valve 11. In the event of unstable inlet air supply or low air supply pressure in the air supply pipeline 12, the pressure relief valve 11 can solve the problem of molten metal splashing caused by unstable air supply.

[0036] In a specific embodiment, a silencing device 13 is provided on one side of the pressure relief valve 11. The silencing device 13 can reduce the fluctuation of the gas source on the metal liquid surface and reduce the metal liquid from scouring the inner wall of the casting machine 19.

[0037] In a specific embodiment, a casting exhaust valve 18 is also provided on the gas source drying pipeline 8; the casting exhaust valve 18 has a pressure reduction and protection function.

[0038] In a specific embodiment, an oil mist separator 16 and a regulator 17 are sequentially provided in the gas delivery direction of the pretreatment pipeline 2; during the pretreatment of the air source, the oil mist separator 16 can prevent oil or water mist from entering the casting furnace, thereby causing the risk of instability of the pneumatic casting machine 19.

[0039] In a specific implementation, the regulator 17 is a pressure reducing valve, which performs a preliminary pressure reducing adjustment to facilitate subsequent adjustment and control by the proportional valve 3.

[0040] In a specific implementation, the booster 6 is a gas booster or an air booster pump, so that a compressed air source can be obtained through the booster 6 to perform the function of boosting the output pressure.

[0041] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A precision gas supply and pressurization device for a pneumatic casting furnace, characterized in that, It includes an air inlet connector (1) connected to one end of a pretreatment pipeline (2), the other end of the pretreatment pipeline (2) being connected to the inlet of a proportional valve (3) via a hose, the outlet of the proportional valve (3) being connected to the inlet of a soup injection valve (5) via a hose, the multiple branch outlets of the soup injection valve (5) being connected to a booster (6) via hoses, the booster (6) being connected to the inlet of a gas source drying pipeline (8) via a booster combination pipe, and the outlet of the gas source drying pipeline (8) being connected to the air inlet of a casting machine (19) via an air outlet connector (10). The proportional valve (3), the soup injection valve (5), and the booster (6) are all electrically connected to the PLC control box (4).

2. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 1, characterized in that, The booster circuit pipe is equipped with a pressure sensor (14) that is electrically connected to the PLC control box (4).

3. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 2, characterized in that, The booster combining pipe includes an upper booster combining pipe (7) and a lower booster combining pipe (15). The upper booster combining pipe (7) is connected to the outlet end of the booster (6) through a branch pipe, and the lower booster combining pipe (15) is connected to the inlet end of the booster (6) through a branch pipe.

4. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 3, characterized in that, The upper pressure boosting and combining pipe (7) is used to connect to the inlet end of the gas source drying and processing pipeline (8), and the gas source drying and processing pipeline (8) is provided with at least one drying processor (9).

5. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 3, characterized in that, The lower booster pipe (15) is used to connect to the outlet end of the pressure relief valve (11). The inlet end of the pressure relief valve (11) is connected to the air intake connector (1) through the air intake pipe (12). The pressure relief valve (11) is used to electrically connect to the PLC control box (4).

6. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 5, characterized in that, A silencer (13) is provided on one side of the pressure relief valve (11).

7. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 1, characterized in that, The gas source drying pipeline (8) is also equipped with a casting exhaust valve (18).

8. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 1, characterized in that, The pretreatment pipeline (2) is provided with an oil mist separator (16) and a regulator (17) in sequence along the gas delivery direction.

9. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 8, characterized in that, The regulator (17) is a pressure reducing valve.

10. The precise gas supply and pressurization device for a pneumatic casting furnace according to claim 1, characterized in that, The booster (6) is a gas booster or an air booster pump.

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