Large forging oil quenching extinguishing device

Abstract

The utility model discloses a large -scale forge piece oil quenching fire extinguishing device belongs to metal heat treatment technical field, including two flat -bed car, can be on the oil pool upper end translation, the one side of flat -bed car is fixed link half arc shape, the lateral wall of half arc shape cover is connected with the air -exhaust pipe, the export end of air -exhaust pipe stretches into the bottom of cooling oil tank, is equipped with the fan in the top of cooling oil tank, the tail end of air -exhaust pipe connected with the fan stretches into the oil storage level below of oil pool, is fixed in the top of half arc shape cover half arc shape board, the lateral wall of half arc shape board is equipped with the multiple nozzles of interval even distribution. The utility model only releases the fire -retardant gas in the workpiece four around concentration, and the gas consumption is little, and the cost is low, but the effect of fire -retardant is good, and oil gas not only can extract the workpiece, reduces the possibility of burning, can also avoid the disorderly discharge, reduces the pollution, and achieves two aims at one stroke.

Description

Technical Field

[0001] This utility model belongs to the field of metal heat treatment technology and relates to a large forging oil quenching fire extinguishing device. Background Technology

[0002] When a workpiece is quenched after being taken out of the furnace, the cooling oil vaporizes upon contact with the red-hot workpiece. Upon contact with air, it forms a flammable oil-gas mixture, which can then be ignited by the red-hot workpiece, making the workpiece prone to fire during oil quenching. To overcome this fire ignition problem, existing technologies, such as the patent with publication number CN 05288901 A, "A Fire Extinguishing Device for a Heat Treatment Quenching Oil Tank," use a box to cover the workpiece, preventing it from contacting air, and then use carbon dioxide for assisted fire extinguishing. However, this solution is only suitable for small workpieces. For large forgings, the volume is too large to easily accommodate a sealed box. Another example is the patent with publication number CN204601435U, "A Nitrogen Fire Extinguishing Device for a Heat Treatment Quenching Oil Tank." This solution involves densely packed nitrogen nozzles around the perimeter of the oil tank to cover the top of the tank with flame-retardant gas, thus achieving a flame-retardant effect. However, this method consumes a huge amount of nitrogen, and the center of the oil bath is usually where the workpiece is quenched, while the amount of nitrogen in the center of the oil bath is sparse, making it difficult to completely prevent air from contacting the workpiece, thus still posing a risk of fire. In addition, even if the oil and gas are not ignited, the disorderly emission of fumes will still pollute the environment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a fire extinguishing device for oil quenching of large forgings. The purpose is to design an exhaust-type fire extinguishing device that can extract and exhaust flammable oil and gas, reduce the risk of fire, and is suitable for large workpieces, while also reducing the consumption of flame-retardant gas.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a large forging oil quenching extinguishing device, comprising two flatbed carts, each flatbed cart having rollers at its bottom; the rollers are mounted on the upper edge of an oil tank used for quenching, allowing the flatbed carts to move horizontally above the oil tank; a semi-circular cover is fixedly connected to one side of each flatbed cart, allowing the two semi-circular covers to close together when the two flatbed carts are relatively close; an exhaust pipe is connected to the side wall of each semi-circular cover, the outlet end of which extends into the bottom of a cooling oil tank; a fan is provided at the top of the cooling oil tank. The end of the air inlet pipe connected to the fan is above the oil level in the cooling oil tank, and the end of the air outlet pipe connected to the fan extends below the oil level in the oil sump. A semi-circular plate is fixed at the top of the semi-circular cover so that the two semi-circular plates can close together when the two flatbeds are close to each other. The side wall of the semi-circular plate is provided with a plurality of nozzles evenly spaced apart. The outer side of the nozzle is connected to a semi-circular gas collecting pipe fixed on the outer side of the semi-circular plate. The outer side of the gas collecting pipe is connected to a flame-retardant gas source device through a vent pipe to provide high-pressure flame-retardant gas to the nozzle.

[0005] As a further optimization, the cooling oil tank is fixed to the flatbed truck.

[0006] As a further optimization, the gas-retardant source device includes a gas storage cylinder fixed on the flatbed vehicle.

[0007] As a further optimization, the flame-retardant source device also includes a high-pressure hose connected to the gas storage cylinder, the end of which is connected to a flame-retardant gas pipeline fixed outside the oil tank.

[0008] As a further optimization, the gas in the flame-retardant gas pipeline is nitrogen or carbon dioxide.

[0009] As a further optimization, a pressure sensor is provided on the gas storage cylinder; the pressure sensor is connected to the circuit of the electrically controlled valve provided on the high-pressure hose, and is used to control the opening and closing of the electrically controlled valve according to the pressure inside the gas storage cylinder detected by the pressure sensor.

[0010] Compared with the prior art, the beneficial effects of this utility model are: this utility model releases flame-retardant gas only around the workpiece, with low gas consumption and low cost, but good flame-retardant effect; the oil and gas can not only be extracted from the workpiece, reducing the possibility of combustion, but also avoid disorderly emission and reduce pollution, achieving two goals at once. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0012] Figure 2 for Figure 1 Top view.

[0013] The correspondence between the technical features in the figure and the reference numerals is as follows: flatbed 1; roller 11; oil tank 2; semi-circular cover 3; exhaust pipe 31; cooling oil tank 4; fan 41; air inlet pipe 42; air outlet pipe 43; semi-circular plate 5; nozzle 51; air collection pipe 52; ventilation pipe 53; gas storage cylinder 6; lifting equipment 7; workpiece 8. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Example 1, please refer to Figure 1-2 This utility model provides a technical solution: a large forging oil quenching fire extinguishing device, comprising two flatbed carts 1; the bottom of each flatbed cart 1 is provided with rollers 11, which are mounted on the upper edge of an oil tank 2 for quenching, allowing the flatbed cart 1 to move horizontally above the oil tank 2; a semi-circular cover 3 is fixedly connected to one side of each flatbed cart 1, allowing the two semi-circular covers 3 to close together when the two flatbed carts 1 are relatively close; an exhaust pipe 31 is connected to the side wall of each semi-circular cover 3, the outlet end of which extends into the bottom of a cooling oil tank 4; a fan 41 is provided at the top of the cooling oil tank 4, and the fan 41 is connected to an inlet... The end of the air pipe 42 is located above the oil level of the cooling oil tank 4, and the end of the air outlet pipe 43 connected to the fan 41 extends below the oil level of the oil sump 2; a semi-circular plate 5 is fixed at the top of the semi-circular cover 3 so that the two semi-circular plates 5 can close together when the two flatbed carts 1 are close to each other; the side wall of the semi-circular plate 5 is provided with a plurality of nozzles 51 evenly spaced, the outer side of the nozzles 51 is connected to a semi-circular air collecting pipe 52 fixed on the outer side of the semi-circular plate 5, and the outer side of the air collecting pipe 52 is connected to a flame-retardant gas source device through an air pipe 53 to provide high-pressure flame-retardant gas to the nozzles 51.

[0016] In use, the two semi-circular covers 3 are brought together by the flatbed cart 1, with the middle position of the two semi-circular covers 3 serving as the channel for the workpiece 8 to enter the oil tank 2. The workpiece 8 is lifted using the starting equipment and placed into the oil tank 2 through this channel. Before this, the blower 41 and the flame-retardant source device are turned on, and the flame-retardant gas is released above the semi-circular covers 3. At the same time, the blower 41 draws air from inside the semi-circular covers 3. As the workpiece 8 falls, when it comes into contact with the oil, the heated and volatilized oil vapor is drawn into the cooling oil tank 4. After preliminary cooling, it is discharged into the oil tank 2. At this time, the cooled oil vapor temperature is low and will not damage the blower 41. The flame-retardant gas released at the same time replenishes the oil in the semi-circular covers 3 on the one hand, and prevents air from contacting the workpiece 8 on the other hand, thus playing a flame-retardant role. It is evident that most of the oil and gas is discharged into the oil tank 2, reducing unnecessary emissions; the flame-retardant gas flows downward into the semi-circular cover 3, which is opposite to the air heat convection, and can better wrap the workpiece 8, preventing the oil and gas from contacting the hot workpiece 8 and preventing combustion; secondly, even if a small amount of oil and gas leaks, the temperature drops after being cooled by the flame-retardant gas, which also reduces the possibility of combustion.

[0017] For a compact equipment structure, the cooling oil tank 4 is fixedly mounted on the flatbed trolley 1. The oil in the cooling oil tank 4 can be drawn from the oil sump 2 by an oil pump, and can be replaced after a period of use, making oil removal and drainage convenient.

[0018] At a minimum, the flame-retardant gas source device includes a gas storage cylinder 6 fixed to the flatbed trolley 1. The gas in the flame-retardant gas pipeline is nitrogen or carbon dioxide. Nitrogen or carbon dioxide is readily available and inexpensive. Since the flame-retardant gas is only released during the process of the workpiece 8 entering the oil tank 2, as long as the capacity of the gas storage cylinder 6 is sufficient, it can meet the needs. Then, when there is no workpiece 8 to be quenched, the gas storage cylinder 6 can be replaced or replenished with flame-retardant gas.

[0019] More preferably, the flame-retardant gas source device also includes a high-pressure hose connected to the gas storage cylinder 6, the end of which is connected to a flame-retardant gas pipeline fixed outside the oil tank 2. Flame-retardant gas is then replenished to the gas storage cylinder 6 as needed.

[0020] Even better, the gas cylinder 6 is equipped with a pressure sensor; the pressure sensor is connected to an electronically controlled valve circuit on the high-pressure hose, and is used to control the opening and closing of the electronically controlled valve based on the pressure detected by the pressure sensor inside the gas cylinder 6. This makes the operation of replenishing gas into the gas cylinder 6 automatic and more convenient to use.

[0021] The advantage of this embodiment is that the device releases flame-retardant gas only around the workpiece 8, which consumes less gas and has a lower cost, but has a better flame-retardant effect. The oil and gas can not only be extracted from the workpiece 8 to reduce the possibility of combustion, but also avoid disorderly emissions and reduce pollution, achieving two goals at once.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A large forging oil quenching extinguishing device, comprising two flatbed carts (1), wherein the bottom of the flatbed carts (1) is provided with rollers (11); characterized in that: The roller (11) is mounted on the upper edge of the oil tank (2) for quenching, so that the flatbed cart (1) can move horizontally on the upper end of the oil tank (2); a semi-circular cover (3) is fixedly connected to one side of the flatbed cart (1), so that the two semi-circular covers (3) can close together when the two flatbed carts (1) are close to each other; the side wall of the semi-circular cover (3) is connected to an exhaust pipe (31), the outlet end of the exhaust pipe (31) extends into the bottom of the cooling oil tank (4), a fan (41) is provided on the top of the cooling oil tank (4), the end of the air inlet pipe (42) connected to the fan (41) is located above the oil level of the cooling oil tank (4), and the end of the air outlet pipe (43) connected to the fan (41) extends below the oil level of the oil tank (2); A semi-circular plate (5) is fixed at the top of the semi-circular cover (3) so that the two semi-circular plates (5) can close together when the two flatbed carts (1) are close to each other; the side wall of the semi-circular plate (5) is provided with a plurality of nozzles (51) evenly spaced apart, the outer side of the nozzle (51) is connected to a semi-circular gas collecting pipe (52) fixed on the outer side of the semi-circular plate (5), and the outer side of the gas collecting pipe (52) is connected to a gas-resistant gas source device through a vent pipe (53) to provide high-pressure gas-resistant gas to the nozzle (51).

2. The oil quenching and extinguishing device for large forgings according to claim 1, characterized in that: The cooling oil tank (4) is fixed on the flatbed vehicle (1).

3. The oil quenching and extinguishing device for large forgings according to claim 1, characterized in that: The gas-retardant source device includes a gas storage cylinder (6) fixed on the flatbed vehicle (1).

4. The oil quenching and extinguishing device for large forgings according to claim 3, characterized in that: The flame-retardant gas source device also includes a high-pressure hose connected to the gas storage cylinder (6), the end of which is connected to a flame-retardant gas pipeline outside the oil tank (2).

5. A large forging oil quenching extinguishing device according to claim 4, characterized in that: The gas in the flame-retardant gas pipeline is nitrogen or carbon dioxide.

6. The oil quenching and extinguishing device for large forgings according to claim 4, characterized in that: A pressure sensor is provided on the gas storage cylinder (6); the pressure sensor is connected to the circuit of the electrically controlled valve provided on the high-pressure hose, and is used to control the opening and closing of the electrically controlled valve according to the pressure inside the gas storage cylinder (6) detected by the pressure sensor.

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