A hot flue gas flow control device for an aluminum alloy smelting furnace

Abstract

The present invention discloses a novel hot flue gas flow control device for an aluminum alloy smelting furnace, comprising a lifting chain, a pull-down chain and a gate; the lifting chain is connected to the top of the gate, the pull-down chain is connected to the bottom of the gate, the gate is placed in a gate traction frame, and a fixed pulley is installed on the gate traction frame. The beneficial effects of the present invention are as follows: the present invention adds movable guide devices on both sides of the gate valve to limit the gate to move only up and down, reducing the uncertainty of the gate movement during work and making it more stable; a reverse lifting system is added, and traction is provided for the up and down movement of the gate, and corresponding adjustments can be made immediately after receiving the feedback signal, which can avoid the occurrence of the jamming phenomenon to a great extent and control the movement amplitude of the gate more accurately.

Description

Technical Field

[0001] The invention relates to a control device, in particular to a hot flue gas flow control device for an aluminum alloy smelting furnace, belonging to the technical field of aluminum alloy smelting. Background Art

[0002] During the exhaust process of the aluminum alloy melting furnace, the remote monitoring system controls the pressure of the melting furnace in a safe range (50~100pa micro-positive pressure) by controlling the opening and closing of the gate valve. However, part of the hot flue gas will be directly discharged and take away a large amount of heat energy in the furnace. Therefore, accurate control of the hot flue gas exhaust flow rate can reduce unnecessary heat energy loss and save energy.

[0003] The existing hot smoke pipe gate valve controls the flow rate by moving the gate up and down; the operating environment temperature is high, and the inner wall and gate of the gate valve are made of castable material. When the gate valve is working, the motor rotates to drive the chain to pull up the gate to reduce the flue gas flow; the motor rotates in the opposite direction to loosen the chain, and the gate moves downward under the action of gravity to increase the flue gas flow. However, in a large number of practical processes, long-term use in high-temperature environments will cause the internal structure of the gate valve to expand and deform due to high temperature. Simply relying on gravity to move the gate valve downward will increase the friction between the gate and the surrounding area, resulting in inaccurate or even excessive adjustment of the flue gas flow, causing it to get stuck. Summary of the invention

[0004] The purpose of the present invention is to provide a hot flue gas flow control device for an aluminum alloy smelting furnace in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a hot flue gas flow control device for an aluminum alloy smelting furnace, comprising a lifting chain, a pull-down chain and a gate plate; the lifting chain is connected to the top end of the gate plate, the pull-down chain is connected to the bottom end of the gate plate, the gate plate is placed in a gate plate traction frame, the gate plate is placed in a gate plate traction frame, and a fixed pulley is installed on the gate plate traction frame.

[0006] As a further solution of the present invention: two lifting chains are provided, and the lifting chains pass around the fixed pulley and are wound around the drum in a clockwise manner.

[0007] As a further solution of the present invention: the pull-down chain passes around the fixed pulley and is wound around the reel counterclockwise.

[0008] As a further solution of the present invention: a suspension rod is provided at the connection between the lifting chain and the pull-down chain and the gate plate.

[0009] As a further solution of the present invention: the reel is installed on the outside of the gate plate traction frame, and the reel is connected to the rotating shaft of the external stepping motor and driven.

[0010] As a further solution of the present invention: limiters are respectively installed at the highest point and the lowest point of the gate.

[0011] As a further solution of the present invention: the inner frame of the gate plate traction frame is fixedly mounted with a guide roller, and the outer frame of the gate plate traction frame is provided with a groove.

[0012] The beneficial effects of the present invention are as follows: the hot flue gas flow control device of the aluminum alloy smelting furnace is reasonably designed:

[0013] 1. The present invention adds movable guide devices on both sides of the gate valve to limit the gate plate to move only up and down, reducing the uncertainty factors of the gate plate's movement during operation and making it more stable;

[0014] Second, the present invention adds a reverse lifting system, which is provided with traction for the up and down movement of the gate plate. It can make corresponding adjustments immediately after receiving the feedback signal, which can avoid the occurrence of jamming to a great extent and control the movement range of the gate plate more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention.

[0016] In the figure: 1, lifting chain, 2, drum, 3, guide roller, 4, pull-down chain, 5, gate, 6, limiter, 7, fixed pulley, 8, gate traction frame and 9, suspension rod. DETAILED DESCRIPTION

[0017] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 A hot flue gas flow control device for an aluminum alloy smelting furnace comprises a lifting chain 1, a pull-down chain 4 and a gate plate 5; the lifting chain 1 is connected to the top end of the gate plate 5, the pull-down chain 4 is connected to the bottom end of the gate plate 5, the gate plate 5 is placed in a gate plate traction frame 8, the gate plate 5 is placed in the gate plate traction frame 8, and a fixed pulley 7 is installed on the gate plate traction frame 8.

[0019] Furthermore, in an embodiment of the present invention, two lifting chains 1 are provided, and the lifting chains 1 pass around the fixed pulley 7 and are wound around the drum 2 in a clockwise manner, and the drum 2 is rotated clockwise to drive the gate plate 5 to move upward.

[0020] Furthermore, in an embodiment of the present invention, the pull-down chain 4 passes around the fixed pulley 7 and is wound around the reel 2 counterclockwise, and the reel 2 is rotated counterclockwise, thereby driving the gate plate 5 to move downward.

[0021] Furthermore, in an embodiment of the present invention, a suspension rod 9 is provided at the connection between the lifting chain 1 and the pull-down chain 4 and the gate plate 5, so as to facilitate the connection between the chain and the gate plate 5 and also to adjust the tightness of the chain.

[0022] Furthermore, in an embodiment of the present invention, the reel 2 is installed on the outside of the gate traction frame 8, and the reel 2 is connected to the rotating shaft of the external stepping motor to drive the reel 2 clockwise or counterclockwise, thereby realizing the up and down movement adjustment of the gate 5.

[0023] Furthermore, in an embodiment of the present invention, limiters 6 are respectively installed at the highest point and the lowest point of the gate plate 5 to limit the movement range of the gate plate 5, thereby ensuring the accuracy of the movement range.

[0024] Furthermore, in an embodiment of the present invention, a guide roller 3 is fixedly installed on the inner frame of the gate traction frame 8, and a groove is opened on the outer frame of the gate traction frame 8, which can guide the guide roller 3, thereby limiting the gate 5 to move only up and down, reducing the uncertainty factors of the movement of the gate 5 during work, making it more stable.

[0025] Working principle: When using the hot flue gas flow control device for an aluminum alloy smelting furnace, the PLC is used to adjust the opening and closing of the gate plate 5 according to the pressure signal in the furnace. When the stepper motor drives the drum 2 to rotate clockwise, the lifting chain 1 bypasses the fixed pulley 7 and is wound around the drum 2 clockwise, thereby driving the gate plate 5 to move upward. When the stepper motor drives the drum 2 to rotate counterclockwise, the pull-down chain 4 bypasses the fixed pulley 7 and is wound around the drum 2 counterclockwise, thereby driving the gate plate 5 to move downward. At the same time, under the action of the guide roller 3, the gate plate 5 is limited to move up and down, thereby reducing the uncertainty factors of the movement of the gate plate 5 during work and making it more stable.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hot flue gas flow control device for an aluminum alloy smelting furnace, comprising a lifting chain (1), a pull-down chain (4) and a gate plate (5); characterized in that: The lifting chain (1) is connected to the top end of the gate plate (5), the pull-down chain (4) is connected to the bottom end of the gate plate (5), the gate plate (5) is placed in a gate plate traction frame (8), and a fixed pulley (7) is installed on the gate plate traction frame (8); The pull-down chain (4) passes around the fixed pulley (7) and is wound counterclockwise on the reel (2); The inner frame of the gate plate traction frame (8) is fixedly mounted with a guide roller (3), and the outer frame of the gate plate traction frame (8) is provided with a groove; Two lifting chains (1) are provided, and the lifting chains (1) pass around the fixed pulley (7) and are wound around the reel (2) in a clockwise direction; The reel (2) is mounted on the outside of the gate plate traction frame (8), and the reel (2) is connected to the rotating shaft of an external stepping motor for driving.

2. The hot flue gas flow control device for an aluminum alloy smelting furnace according to claim 1, characterized in that: A suspension rod (9) is provided at the connection between the lifting chain (1) and the pull-down chain (4) and the gate plate (5).

3. The hot flue gas flow control device for an aluminum alloy smelting furnace according to claim 1, characterized in that: Limiters (6) are respectively installed at the highest point and the lowest point of the gate plate (5).

Images