Closed molten aluminum chute shielding gas filling control system

Abstract

The utility model relates to the technical field of metal smelting, in particular to a closed molten aluminum chute shielding gas filling control system which comprises a PLC (programmable logic controller), a pressure regulating valve, a proportional flow regulating valve and a flow transmitter, and the pressure regulating valve, the proportional flow regulating valve and the flow transmitter are electrically connected with the PLC. The pressure regulating valve is connected with the proportional flow regulating valve through a pipeline, the outlet end of the proportional flow regulating valve is connected with the flow transmitter, the rear end of the flow transmitter is connected into the chute through a pipeline, and the end, away from the proportional flow regulating valve, of the pressure regulating valve is connected with the gas conveying pump. According to the utility model, automatic and sufficient shielding gas filling can be realized, so that the protection effect in the aluminum liquid conveying process is improved, and the high quality and stability of the aluminum liquid are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metal smelting technical field, especially relates to a closed liquid aluminum chute protection gas filling control system. BACKGROUND

[0002] The liquid aluminum is easy to be influenced by oxygen and moisture in the air during the process of being transported from the quantitative furnace to the die casting machine, which leads to the oxidation and quality decline of the liquid aluminum. In order to solve this problem, the prior art adopts the closed structure conveying chute to reduce the time of the liquid aluminum exposed to the air and reduce the oxidation risk through the nitrogen protection.

[0003] Most of the current liquid aluminum conveying chutes adopt the manual or semi-automatic nitrogen filling mode, which cannot guarantee that the nitrogen can be fully filled before each liquid aluminum transportation, and affects the quality stability of the liquid aluminum. The specific performance is as follows:

[0004] 1. Insufficient nitrogen filling: the manual filling mode may lead to poor nitrogen protection effect.

[0005] 2. Complex operation: manual intervention is needed, which reduces the automation level.

[0006] 3. Liquid aluminum quality fluctuation: due to the unstable protection measures, the quality of the liquid aluminum is easily affected.

[0007] Therefore, it is necessary to design a control system which can realize automatic and sufficient protection gas filling. UTILITY MODEL CONTENTS

[0008] The utility model aims at solving the defects existing in the prior art, and provides a closed liquid aluminum chute protection gas filling control system, which can realize automatic and sufficient inert gas filling, so as to improve the protection effect in the process of liquid aluminum transmission and ensure the high quality and stability of the liquid aluminum.

[0009] Technical scheme: in order to realize the above purpose, the utility model provides a closed liquid aluminum chute protection gas filling control system, which comprises a PLC controller, a pressure regulating valve, a proportional flow regulating valve and a flow transmitter, the pressure regulating valve, the proportional flow regulating valve and the flow transmitter are electrically connected with the PLC controller; the PLC controller can issue instructions to control the opening degree of the pressure regulating valve and the proportional flow regulating valve, so as to control the system pressure and gas flow, and the flow transmitter can obtain the flow information in the gas circuit and feed back the information to the PLC controller.

[0010] The pressure regulating valve is connected with the proportional flow regulating valve through a pipeline, the outlet end of the proportional flow regulating valve is connected with the flow transmitter, the rear end of the flow transmitter is connected with the inside of the chute through a pipeline, and the end, away from the proportional flow regulating valve, of the pressure regulating valve is connected with the gas delivery pump.

[0011] The conveying pump inputs the protective gas into the chute, the pressure is adjusted by the pressure regulating valve, the gas flow is adjusted by the proportional flow regulating valve, and the flow transmitter monitors the flow of the protective gas.

[0012] Further, a first on-off valve is arranged on the connecting pipeline between the pressure regulating valve and the gas conveying pump. The opening and closing of the first on-off valve controls the on-off of the entire protective gas circuit.

[0013] Further, a second on-off valve is arranged on the connecting pipeline between the pressure regulating valve and the proportional flow regulating valve. The second on-off valve is arranged on a branch of the gas pipeline inside the chute. The second on-off valve is used to control the opening and closing of the actual protective gas branch of the chute.

[0014] Further, the first on-off valve and the second on-off valve are both manual on-off valves. The first on-off valve and the second on-off valve control the on-off of the gas circuit.

[0015] Further, a pressure gauge is arranged on the pressure regulating valve. The staff can directly and visually observe the internal gas pressure from the outside.

[0016] Further, the proportional flow regulating valve is a piezoelectric flow regulating valve.

[0017] Still further, the protective gas is inert gas.

[0018] The above technical solution can have the following beneficial effects compared with the prior art:

[0019] The closed aluminum liquid chute protective gas filling control system provided by the utility model has the following advantages: the first on-off valve inlet supplies inert gas and controls the opening and closing of the entire gas circuit, the pressure regulating valve adjusts the system pressure range and ensures the stability of the pressure in the system, prevents the influence of pressure fluctuation on the flow, the second on-off valve controls the opening and closing of the actual protective gas branch of the chute, the proportional flow valve accurately adjusts the inert gas flow, the flow transmitter feeds back the real-time flow to the PLC controller, the PLC controller adjusts the opening degree of the proportional flow valve according to the feedback signal, realizes closed-loop control, and the PLC controller can automatically adjust the system flow to the preset value according to the target setting and real-time feedback, without manual intervention, so that the system can stably and accurately operate. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model discloses a kind of closed aluminum liquid chute protective gas filling control system pneumatic schematic diagram.

[0021] In the figure: 1-pressure regulating valve, 11-pressure gauge, 2-proportional flow regulating valve, 3-flow transmitter, 4-first on-off valve, 5-second on-off valve. DETAILED DESCRIPTION

[0022] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] like Figure 1 As shown, a closed-loop aluminum molten chute protective gas filling control system includes a PLC controller, a pressure regulating valve 1, a proportional flow regulating valve 2, and a flow transmitter 3. The pressure regulating valve 1, the proportional flow regulating valve 2, and the flow transmitter 3 are all electrically connected to the PLC controller.

[0024] The pressure regulating valve 1 is connected to the proportional flow regulating valve 2 via a pipeline. The outlet end of the proportional flow regulating valve 2 is connected to the flow transmitter 3. The rear end of the flow transmitter 3 is connected to the inside of the chute via a pipeline. The end of the pressure regulating valve 1 facing away from the proportional flow regulating valve 2 is connected to a gas delivery pump. In this embodiment, the flow transmitter 3 uses a highly flexible and highly responsive flow sensor, ensuring the accuracy and stability of the feedback flow.

[0025] A first switching valve 4 is installed on the connecting pipeline between the pressure regulating valve 1 and the gas delivery pump. A second switching valve 5 is installed on the connecting pipeline between the pressure regulating valve 1 and the proportional flow regulating valve 2. It should be noted that reliable and easy-to-operate switching valves, such as the first switching valve 4 and the second switching valve 5, can be selected to ensure that the system supplies gas quickly and reliably.

[0026] Specifically, the second switching valve 5 is located inside the chute on a branch of the gas pipeline. Both the first switching valve 4 and the second switching valve 5 are manually operated.

[0027] Specifically, the pressure regulating valve 1 is equipped with a pressure gauge 11.

[0028] Furthermore, the proportional flow regulating valve 2 is a piezoelectric flow regulating valve. The proportional flow regulating valve 2 utilizes piezoelectric technology and features an integrated control loop with a thermal sensor, enabling dynamic and precise flow regulation with the advantage of being noiseless.

[0029] Preferably, the protective gas is an inert gas. The inert gas can be any gas that does not readily react with aluminum, such as nitrogen or argon.

[0030] In this embodiment, the PLC controller utilizes a feedback adjustment mechanism to achieve automated and thorough protective gas filling. The specific workflow is as follows:

[0031] Before the molten aluminum is transported, the gas delivery pump is started to automatically fill the ladle with nitrogen, and is closed after a few seconds to ensure complete replacement of air. Upon receiving a signal that the molten aluminum is to be transported, the molten aluminum delivery pump is started. During the flow of the molten aluminum, the ladle is kept under nitrogen protection to prevent oxidation of the molten aluminum. The control system monitors the nitrogen filling flow in the ladle in real time and adjusts it in real time, ensuring that the molten aluminum is transported in a safe environment. After the molten aluminum is transported, the molten aluminum delivery pump is turned off.

[0032] The specific working principle of the control system is as follows:

[0033] As shown in Figure 1 , the first switch valve 4 inlet supplies inert gas and controls the opening and closing of the entire gas circuit. The pressure regulating valve 1 adjusts the system pressure range and ensures that the pressure in the system is stable, preventing pressure fluctuations from affecting the flow. The second switch valve 5 controls the opening and closing of the actual ladle inert gas protection system branch, and the proportional flow valve 2 accurately adjusts the inert gas flow. The flow transmitter 3 feeds back the real-time flow to the PLC controller, and the PLC controller adjusts the opening of the proportional flow valve 2 according to the feedback signal to realize closed-loop control. The PLC controller can automatically adjust the system flow to the preset value according to the target setting and real-time feedback, without manual intervention, ensuring that the system operates stably and accurately.

[0034] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements can be made without departing from the principles of the present application, and these improvements should also be considered within the protection scope of the present application.

Claims

1. A closed-type molten aluminum bath ladle protection gas filling control system, characterized by, The device comprises a PLC controller, a pressure regulating valve (1), a proportional flow regulating valve (2) and a flow transmitter (3), wherein the pressure regulating valve (1), the proportional flow regulating valve (2) and the flow transmitter (3) are electrically connected with the PLC controller. The pressure regulating valve (1) is connected with the proportional flow regulating valve (2) through a pipeline, an outlet end of the proportional flow regulating valve (2) is connected with the flow transmitter (3), a rear end of the flow transmitter (3) is connected into the chute through a pipeline, and an end of the pressure regulating valve (1) away from the proportional flow regulating valve (2) is connected with a gas delivery pump.

2. A closed-type molten aluminum bath ladle protection gas filling control system according to claim 1, characterized in that, A first switch valve (4) is arranged on a connecting pipeline between the pressure regulating valve (1) and the gas delivery pump.

3. A closed aluminium metal ladle protection gas filling control system according to claim 2, characterised in that, A second switch valve (5) is arranged on a connecting pipeline between the pressure regulating valve (1) and the proportional flow regulating valve (2).

4. A closed-type molten aluminum bath ladle protection gas filling control system according to claim 3, characterized in that, The second switch valve (5) is arranged on a branch of the gas pipeline in the chute.

5. A closed aluminium metal ladle protection gas filling control system according to claim 4, wherein, The first switch valve (4) and the second switch valve (5) are both manual switch valves.

6. A closed aluminium metal ladle protection gas filling control system according to claim 1, characterised in that, A pressure gauge (11) is arranged on the pressure regulating valve (1).

7. A closed-type molten aluminum bath ladle protection gas filling control system according to claim 1, wherein The proportional flow regulating valve (2) is a piezoelectric flow regulating valve.

8. A closed-type molten aluminum bath ladle protection gas filling control system according to claim 1, wherein The protective gas is an inert gas.

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