Furnace door flue interlocking device for aluminum smelting furnace

Abstract

A furnace door flue interlocking device for an aluminum smelting furnace comprises a rotary knob, a manual loop, an automatic loop, a flue valve opening electromagnetic valve and a flue valve closing electromagnetic valve. The knob can switch between a manual loop and an automatic loop; the manual loop and the automatic loop are arranged in parallel, a control coil of the manual control contactor is connected with one output end of the knob, the flue valve opening button is correspondingly connected with the flue valve opening electromagnetic valve in series, and the flue valve closing button is correspondingly connected with the flue valve closing electromagnetic valve in series; the automatic loop comprises an automatic control relay and a signal control unit, a control coil of an automatic control contactor is connected with the other output end of the knob, and one end of a normally open switch of the automatic control contactor is connected with the signal control unit; the other end of the normally open switch of the automatic control contactor is correspondingly connected with a flue valve opening electromagnetic valve and a flue valve closing electromagnetic valve respectively; the device can improve the production safety of the smelting furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting, in particular to a furnace door and flue interlocking device for an aluminum smelting furnace. Background Art

[0002] As is known, a smelting furnace is a device that can heat metal into a molten metal solution. However, a large amount of smoke will be generated in the smelting furnace during operation. Therefore, a flue for exhausting smoke will be provided at the furnace door of the smelting furnace. When the furnace door of a traditional smelting furnace is opened, the cylinder limit at the furnace door will be triggered, and then the worker will open the flue valve according to the instruction of the cylinder limit. However, if the worker is busy, he may easily forget to open the flue valve, which will cause leakage of waste smoke and endanger the safety of the workers standing by the furnace door. Or if the furnace door of the smelting furnace is closed, but the worker does not close the flue valve, cold air will enter the dust removal equipment through the flue, thereby generating condensed water in the dust removal equipment, thereby damaging the equipment.

[0003] Therefore, in summary, there is a need in the market for a device that can improve the production safety of a smelting furnace. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a furnace door and flue interlocking device for an aluminum smelting furnace.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A furnace door flue interlocking device for an aluminum smelting furnace comprises a knob, a manual circuit, an automatic circuit, a flue valve opening solenoid valve and a flue valve closing solenoid valve; the knob can control the switching of the manual circuit and the automatic circuit; the manual circuit and the automatic circuit are arranged in parallel, wherein the manual circuit comprises a manual control relay, a flue valve opening button and a flue valve closing button, a control coil of a manual control contactor is connected to an output end of the knob, a normally open switch of the manual control contactor is respectively connected to the flue valve opening button and the flue valve closing button, the flue valve opening button is connected in series with the flue valve opening solenoid valve in correspondence, and the flue valve closing button is connected in series with the flue valve closing solenoid valve in correspondence;

[0007] The automatic circuit includes an automatic control relay and a signal control unit, wherein the control coil of the automatic control contactor is connected to the other output end of the knob, one end of the normally open switch of the automatic control contactor is connected to the signal control unit, the signal control unit is composed of an automatic opening control branch and an automatic closing control branch connected in parallel, and the other end of the normally open switch of the automatic control contactor is respectively connected to the flue valve opening solenoid valve and the flue valve closing solenoid valve.

[0008] Preferably, an indicator circuit for reminding workers of the working status of the flue valve is provided in parallel outside the manual circuit and the automatic circuit.

[0009] Preferably, the indication circuit comprises an opening control unit, a closing control unit, an opening indication unit and a closing indication unit connected in parallel, wherein the opening control unit is composed of a valve opening contact and an intermediate relay K1 connected in series, the closing control unit is composed of a valve closing contact and an intermediate relay K2 connected in series, the opening indication unit is composed of a normally open contact of the intermediate relay K1 and an indicator light A connected in series, and the closing indication unit is composed of a normally open contact of the intermediate relay K2 and an indicator light B connected in series.

[0010] Preferably, the automatic opening control branch is composed of a control opening signal contact, a fuse and an intermediate feedback relay K1a connected in series, and the automatic closing control branch is composed of a control closing signal contact, a fuse and an intermediate feedback relay K2a connected in series.

[0011] Preferably, the intermediate feedback relay K1a and the intermediate feedback relay K2a are connected via a mechanical interlocking structure.

[0012] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0013] The utility model discloses a furnace door flue interlocking device for an aluminum smelting furnace, which can realize manual and automatic switching through a knob, so that workers can use a suitable method to complete the opening and closing of the flue valve in a suitable occasion, wherein the manual control does not require the circuit to be always unobstructed, thereby saving energy and being able to be used when the workload of workers is small;

[0014] Automatic control can reduce workers' labor and ensure that the flue valve is opened or closed in time, thereby improving the smelting efficiency and safety of the smelting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the circuit structure of the automatic loop.

[0017] In the figure: 1. Knob; 2. Manual circuit; 201. Manual control relay; 202. Flue valve opening button; 203. Flue valve closing button; 3. Automatic circuit; 301. Automatic control relay; 302. Automatic opening control branch; 303. Automatic closing control branch; 4. Flue valve opening solenoid valve; 5. Flue valve closing solenoid valve; 6. Indication circuit; 601. Open control unit; 602. Close control unit; 603. Open indication unit; 604. Close indication unit. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction:

[0019] Combined with Figure 1-2 The furnace door flue interlocking device for an aluminum smelting furnace comprises a knob 1, a manual circuit 2, an automatic circuit 3, a flue valve opening solenoid valve 4 and a flue valve closing solenoid valve 5; the knob 1 can control the switching of the manual circuit 2 and the automatic circuit 3, so that workers can use appropriate methods to complete the opening and closing of the flue valve in appropriate occasions, wherein the manual control does not require the circuit to be always unobstructed, and is used when the workers have less workload, which has the advantage of saving energy; the automatic control can reduce the labor of workers and ensure that the flue valve is opened or closed in time, thereby improving the smelting efficiency and safety of the smelting furnace;

[0020] The manual circuit 2 and the automatic circuit 3 are arranged in parallel, wherein the manual circuit 2 comprises a manually controlled contactor 201, a flue valve opening button 202 and a flue valve closing button 203, the control coil of the manually controlled contactor 201 is connected to an output end of the knob 1, the normally open switch of the manually controlled contactor 201 is respectively connected to the flue valve opening button 202 and the flue valve closing button 203, the flue valve opening button 202 is correspondingly connected in series with the flue valve opening solenoid valve 4, and the flue valve closing button 203 is correspondingly connected in series with the flue valve closing solenoid valve 5; when the knob 1 turns on the manual circuit 2, when the worker presses the flue valve opening button 202 or the flue valve closing button 203, the flue valve opening solenoid valve 4 and the flue valve closing solenoid valve 5 are correspondingly energized or de-energized, thereby controlling the flue valve to be opened or closed, which is a manual control method;

[0021] The automatic circuit 3 comprises an automatic control contactor 301 and a signal control unit, wherein the control coil of the automatic control contactor 301 is connected to the other output end of the knob 1, one end of the normally open switch of the automatic control contactor 301 is connected to the signal control unit, and the signal control unit is composed of an automatic opening control branch 302 and an automatic closing control branch 303 connected in parallel, and the other end of the normally open switch of the automatic control contactor 301 is respectively connected to the flue valve opening solenoid valve 4 and the flue valve closing solenoid valve 5. When the knob 1 turns on the automatic circuit 3, the signal control unit can receive the melting furnace door opening or closing signal sent by the melting furnace processor, so that the corresponding flue valve opening solenoid valve 4 and the flue valve closing solenoid valve 5 are energized or de-energized, thereby controlling the flue valve to open or close, which is an automatic control method; in addition, the automatic opening control branch 302 is controlled by the opening signal The contacts, fuses and intermediate feedback relay K1a are connected in series correspondingly, and the automatic closing control branch 303 is composed of the control closing signal contacts, fuses and intermediate feedback relay K2a connected in series correspondingly, wherein the opening signal contacts and the closing signal contacts are opened and closed according to the opening or closing signal of the smelting furnace door issued by the smelting furnace processor. When the smelting furnace door is opened, the opening signal contacts are closed and the closing signal contacts are disconnected. When the smelting furnace door is closed, the opening signal contacts are disconnected and the closing signal contacts are closed. In addition, the intermediate feedback relay K1a and the intermediate feedback relay K2a are used to feedback the opening and closing conditions of the flue valve. According to needs, the intermediate feedback relay K1a and the intermediate feedback relay K2a are connected by a mechanical interlocking structure. Through the mechanical interlocking, only one relay can work at the same time, so as to accurately judge whether the result displayed by the indicator light is accurate.

[0022] In addition, the manual circuit 2 and the automatic circuit 3 are provided with an indication circuit 6 in parallel for reminding workers of the working status of the flue valve. As needed, the indication circuit 6 includes an opening control unit 601, a closing control unit 602, an opening indication unit 603 and a closing indication unit 604 connected in parallel, wherein the opening control unit 601 is composed of a valve opening contact and an intermediate relay K1 connected in series, the closing control unit 602 is composed of a valve closing contact and an intermediate relay K2 connected in series, the opening indication unit 603 is composed of a normally open contact of the intermediate relay K1 and an indicator light A connected in series, and the closing indication unit 604 is composed of a normally open contact of the intermediate relay K2 and an indicator light B connected in series. When the flue valve is opened, the processor in the smelting furnace will send a control signal to control the valve opening contact to close, the intermediate relay K1 to be energized, and the indicator light A to light up. When the flue valve is closed, the processor in the smelting furnace will send a control signal to control the valve closing contact to close, the intermediate relay K2 to be energized, and the indicator light B to light up, thereby indicating the workers the current opening and closing status of the flue valve.

[0023] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

Claims

1. A furnace door flue interlocking device for an aluminum smelting furnace, characterized in that: The invention comprises a knob (1), a manual circuit (2), an automatic circuit (3), a flue valve opening solenoid valve (4) and a flue valve closing solenoid valve (5); the knob (1) is capable of controlling the switching of the manual circuit (2) and the automatic circuit (3); the manual circuit (2) and the automatic circuit (3) are arranged in parallel, wherein the manual circuit (2) comprises a manual control contactor (201), a flue valve opening button (202) and a flue valve closing button (203); the control coil of the manual control contactor (201) is connected to an output end of the knob (1); the normally open switch of the manual control contactor (201) is respectively connected to the flue valve opening button (202) and the flue valve closing button (203); the flue valve opening button (202) is connected in series with the flue valve opening solenoid valve (4); and the flue valve closing button (203) is connected in series with the flue valve closing solenoid valve (5); The automatic circuit (3) comprises an automatic control contactor (301) and a signal control unit, wherein the control coil of the automatic control contactor (301) is connected to the other output end of the knob (1), one end of the normally open switch of the automatic control contactor (301) is connected to the signal control unit, the signal control unit is composed of an automatic opening control branch (302) and an automatic closing control branch (303) connected in parallel, and the other end of the normally open switch of the automatic control contactor (301) is respectively connected to a flue valve opening solenoid valve (4) and a flue valve closing solenoid valve (5).

2. The furnace door flue interlocking device for an aluminum smelting furnace according to claim 1, characterized in that: The manual circuit (2) and the automatic circuit (3) are connected in parallel with an indicator circuit (6) for reminding workers of the working status of the flue valve.

3. The furnace door flue interlocking device for an aluminum smelting furnace as claimed in claim 2, characterized in that: The indication circuit (6) comprises an opening control unit (601), a closing control unit (602), an opening indication unit (603) and a closing indication unit (604) connected in parallel, wherein the opening control unit (601) is composed of a valve opening contact and an intermediate relay K1 connected in series, the closing control unit (602) is composed of a valve closing contact and an intermediate relay K2 connected in series, the opening indication unit (603) is composed of a normally open contact of the intermediate relay K1 and an indicator light A connected in series, and the closing indication unit (604) is composed of a normally open contact of the intermediate relay K2 and an indicator light B connected in series.

4. The furnace door flue interlocking device for an aluminum smelting furnace according to claim 1, characterized in that: The automatic opening control branch (302) is composed of a control opening signal contact, a fuse and an intermediate feedback relay K1a connected in series, and the automatic closing control branch (303) is composed of a control closing signal contact, a fuse and an intermediate feedback relay K2a connected in series.

5. The furnace door flue interlocking device for an aluminum smelting furnace as claimed in claim 4, characterized in that: The intermediate feedback relay K1a and the intermediate feedback relay K2a are connected via a mechanical interlocking structure.

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