Oil quenching furnace cold chamber pressure adjusting device and oil quenching furnace

Abstract

The utility model relates to the technical field of oil quenching furnaces, in particular to an oil quenching furnace cold chamber pressure adjusting device and an oil quenching furnace. The utility model provides a pressure regulating device for a cold chamber of an oil quenching furnace. The pressure regulating device comprises a cold chamber body, a negative pressure cavity and a regulating mechanism, a furnace door opening, a nitrogen inlet, a first pressure relief opening and a pressure sensor are arranged on the cold chamber body, a furnace door is arranged at the furnace door opening, and an oil tank is arranged below the cold chamber body; the negative pressure cavity is arranged outside the cold chamber body, a second pressure relief opening is formed in the negative pressure cavity, and the second pressure relief opening communicates with the first pressure relief opening; the adjusting mechanism is arranged at the first pressure relief opening and used for adjusting the opening degree of the first pressure relief opening; and / or; the adjusting mechanism is arranged at the second pressure relief opening and used for adjusting the opening degree of the second pressure relief opening. Pressure relief is conducted through the negative pressure cavity, the furnace door is prevented from being opened, and due to the fact that the interior of the negative pressure cavity is in the negative pressure state, pressure relief is faster after the cold chamber body communicates with the negative pressure cavity.

Description

Technical Field

[0001] This utility model relates to the field of oil quenching furnace technology, and in particular to an oil quenching furnace cold chamber pressure regulating device and an oil quenching furnace. Background Technology

[0002] Quenching technology refers to the process of heating a workpiece to above its critical temperature, holding it at that temperature for a period of time, and then rapidly immersing it in the cooling oil of an oil quenching furnace for cooling. Oil quenching furnaces are widely used for processing alloy structural steel, bearing steel, spring steel, die steel, high-speed steel, and other materials.

[0003] In existing oil quenching furnaces, after the heat-treated workpiece is pulled from the hot chamber into the cold chamber, the high-temperature workpiece releases a large amount of heat when it enters the oil. The nitrogen and oil fumes in the cold chamber expand rapidly and instantly fill the entire cold chamber, causing the pressure in the cold chamber to rise sharply. This can easily cause the furnace door to be pushed open, resulting in the flue gas being directly discharged into the factory area, causing pollution. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure regulating device for the cold chamber of an oil quenching furnace and an oil quenching furnace, so as to solve the technical problem that when a workpiece at high temperature is put into oil, the furnace door is easily pushed open, resulting in the direct discharge of flue gas into the factory area, causing pollution.

[0005] In a first aspect, this utility model provides a pressure regulating device for the cold chamber of an oil quenching furnace, comprising: a cold chamber body, a negative pressure cavity, and a regulating mechanism;

[0006] The cold chamber body is equipped with a furnace door, a nitrogen inlet, a first pressure relief port and a pressure sensor. A furnace door is provided at the furnace door, and an oil tank is provided below the cold chamber body. The pressure sensor is used to detect the pressure inside the cold chamber body.

[0007] The negative pressure chamber is located outside the cold chamber body, and the negative pressure chamber is provided with a second pressure relief port, which is connected to the first pressure relief port.

[0008] The adjustment mechanism is disposed at the first pressure relief port, and the adjustment mechanism is used to adjust the opening degree of the first pressure relief port;

[0009] and / or;

[0010] The adjustment mechanism is located at the second pressure relief port, and the adjustment mechanism is used to adjust the opening degree of the second pressure relief port.

[0011] In an optional implementation, a control module is also included;

[0012] The adjustment mechanism is electrically connected to the control module. Under the action of the control module, the adjustment mechanism is driven to reciprocate to adjust the opening degree of the corresponding pressure relief port.

[0013] In an optional implementation, a mounting plate is also included;

[0014] The cold chamber body is provided with a connection port, and the second pressure relief port is connected to the connection port;

[0015] The mounting plate is disposed within the cold chamber body and connected to the connection port, and the mounting plate is provided with the first pressure relief port;

[0016] The adjustment mechanism includes a movable plate and a driver. The movable plate is disposed at the first pressure relief port. The driver is electrically connected to the control module and is used to drive the movable plate to reciprocate so as to adjust the opening of the first pressure relief port.

[0017] In an optional embodiment, the adjustment mechanism further includes a mounting bracket, and the driver is a telescopic motor;

[0018] Both the mounting bracket and the telescopic motor are located inside the cold chamber body, and the telescopic motor is mounted on the first pressure relief port via the mounting bracket.

[0019] The output end of the telescopic motor is connected to the movable plate.

[0020] In an optional embodiment, the adjustment mechanism further includes a hinge, through which the movable plate is connected to the mounting plate.

[0021] In an optional embodiment, the mounting bracket includes four legs, one end of each leg is connected to the mounting plate and is evenly spaced around the first pressure relief port, and the other end of each leg is connected to the body of the telescopic motor.

[0022] In an optional embodiment, the adjusting mechanism further includes a rotating shaft, and the driver is a rotary motor;

[0023] The movable plate is rotatably connected to the mounting plate via the rotating shaft;

[0024] The output end of the rotary motor is connected to the rotating shaft.

[0025] In an optional embodiment, the negative pressure cavity is a vacuum cavity.

[0026] In an optional embodiment, the container of the vacuum chamber is larger than or equal to the volume of the cold chamber body.

[0027] Secondly, this utility model provides an oil quenching furnace, including the oil quenching furnace cold chamber pressure regulating device described in any of the foregoing embodiments.

[0028] Compared with the prior art, the technical advantages of the oil quenching furnace cold chamber pressure regulating device and oil quenching furnace provided by this utility model are as follows:

[0029] The oil quenching furnace cold chamber pressure regulating device provided by this utility model includes: a cold chamber body, a negative pressure cavity, and an regulating mechanism; the cold chamber body is provided with a furnace door, a nitrogen inlet, a first pressure relief port, and a pressure sensor; a furnace door is provided at the furnace door; an oil tank is provided below the cold chamber body; the pressure sensor is used to detect the pressure inside the cold chamber body; the negative pressure cavity is located outside the cold chamber body; a second pressure relief port is provided on the negative pressure cavity, and the second pressure relief port is connected to the first pressure relief port; the regulating mechanism is located at the first pressure relief port, and the regulating mechanism is used to adjust the opening degree of the first pressure relief port; and / or; the regulating mechanism is located at the second pressure relief port, and the regulating mechanism is used to adjust the opening degree of the second pressure relief port.

[0030] When the heat-treated workpiece enters the oil bath, increasing the pressure inside the cold chamber, a pressure sensor continuously monitors the pressure. When the pressure exceeds a threshold, an adjustment mechanism regulates the opening of the corresponding pressure relief port, connecting the cold chamber to the negative pressure chamber. This allows for pressure relief through the negative pressure chamber, preventing the furnace door from being forced open and thus avoiding the release of flue gas into the factory area and causing pollution. Furthermore, because the negative pressure chamber is under negative pressure, pressure relief is even faster once the cold chamber is connected to it.

[0031] The oil quenching furnace provided by this utility model includes the aforementioned oil quenching furnace cold chamber pressure regulating device. Therefore, the technical advantages and effects achieved by this device are not described in detail here.

[0032] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the adjustment mechanism structure provided in this embodiment of the utility model;

[0035] Figure 2 This is a schematic diagram of the installation of the adjustment mechanism provided in an embodiment of the present utility model;

[0036] Figure 3 A partial structural diagram of the oil quenching furnace provided in an embodiment of this utility model.

[0037] Icons: 1-Cold chamber body; 2-Furnace door; 3-Nitrogen inlet; 4-Pressure sensor; 5-Furnace door; 6-First pressure relief port; 7-Mounting plate; 8-Movable plate; 9-Mounting bracket; 10-Telescopic motor; 11-Hinge; 12

[0038] - Support leg; 13 - Vacuum chamber; 14 - Oil tank. Detailed Implementation

[0039] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0043] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0044] The specific structure is as follows: Figures 1 to 3 As shown.

[0045] This embodiment provides a pressure regulating device for the cold chamber of an oil quenching furnace, comprising: a cold chamber body 1, a negative pressure chamber, and a regulating mechanism; the cold chamber body 1 is provided with a furnace door 2, a nitrogen inlet 3, a first pressure relief port 6, and a pressure sensor 4; a furnace door 5 is provided at the furnace door 2; an oil tank 14 is provided below the cold chamber body 1; the pressure sensor 4 is used to detect the pressure inside the cold chamber body 1; the negative pressure chamber is located outside the cold chamber body 1, and a second pressure relief port is provided on the negative pressure chamber, and the second pressure relief port is connected to the first pressure relief port 6; the regulating mechanism is located at the first pressure relief port 6, and the regulating mechanism is used to adjust the opening degree of the first pressure relief port 6; and / or; the regulating mechanism is located at the second pressure relief port, and the regulating mechanism is used to adjust the opening degree of the second pressure relief port.

[0046] In this embodiment, when the heat-treated workpiece enters the oil tank 14, increasing the pressure inside the cold chamber body 1, the pressure sensor 4 detects the pressure inside the cold chamber body 1 in real time. When the pressure exceeds a threshold, the opening of the corresponding pressure relief port is adjusted by the adjustment mechanism to connect the cold chamber body 1 with the negative pressure chamber, thereby relieving pressure through the negative pressure chamber and preventing the furnace door 5 from being forced open, thus preventing flue gas from being discharged into the factory area and causing pollution. At the same time, because the negative pressure chamber is in a negative pressure state, the pressure relief is faster after the cold chamber body 1 is connected to the negative pressure chamber.

[0047] In the optional technical solution of this embodiment, a control module is also included; the adjustment mechanism is electrically connected to the control module, and under the action of the control module, the adjustment mechanism is driven to reciprocate to adjust the opening degree of the corresponding pressure relief port.

[0048] In this embodiment, the pressure sensor 4 is electrically connected to the control module. When the pressure sensor 4 detects that the pressure inside the cold chamber body 1 is greater than the threshold, the control module controls the adjustment mechanism to adjust the opening of the corresponding pressure relief port, which facilitates automated control. However, it is not limited to this; the adjustment mechanism can also be manually controlled.

[0049] In the optional technical solution of this embodiment, a mounting plate 7 is also included; a connection port is provided on the cold chamber body 1, and the second pressure relief port is connected to the connection port; the mounting plate 7 is disposed inside the cold chamber body 1 and connected to the connection port, and a first pressure relief port 6 is provided on the mounting plate 7; the adjustment mechanism includes a movable plate 8 and a driver, the movable plate 8 is disposed at the first pressure relief port 6, the driver is electrically connected to the control module, and the driver is used to drive the movable plate 8 to reciprocate to adjust the opening degree of the first pressure relief port 6. The adjustment mechanism is only disposed at the first pressure relief port 6, the overall structure is simple, and the installation is convenient and stable.

[0050] In the optional technical solution of this embodiment, the adjustment mechanism further includes a mounting frame 9, and the driver is a telescopic motor 10; both the mounting frame 9 and the telescopic motor 10 are disposed inside the cold chamber body 1, and the telescopic motor 10 is mounted on the first pressure relief port 6 via the mounting frame 9; the output end of the telescopic motor 10 is connected to the movable plate 8. The output end of the telescopic motor 10 drives the movable plate 8 to extend and retract, so that the movable plate 8 blocks or opens the first pressure relief port 6, which is stable and easy to adjust.

[0051] In the optional technical solution of this embodiment, the adjustment mechanism further includes a hinge 11, and the movable plate 8 is connected to the mounting plate 7 via the hinge 11. The movable plate 8 is rotated by the output end of the telescopic motor 10, which can open the first pressure relief port 6 as needed, making the adjustment flexible and convenient.

[0052] In the optional technical solution of this embodiment, the mounting frame 9 includes four support legs 12. One end of each support leg 12 is connected to the mounting plate 7 and is evenly spaced around the first pressure relief port 6. The other end of each support leg 12 is connected to the body of the telescopic motor 10. The structure is simple, easy to install, and stable.

[0053] In the optional technical solution of this embodiment, the adjustment mechanism further includes a rotating shaft, and the driver is a rotary motor; the movable plate 8 is rotatably connected to the mounting plate 7 via the rotating shaft; the output end of the rotary motor is connected to the rotating shaft.

[0054] In this embodiment, the movable plate 8 is rotatably connected to the mounting plate 7 via a rotating shaft. The rotating shaft can be located in the middle of the first pressure relief port 6 or on one side of the first pressure relief port 6. It is driven to rotate by a rotary motor, thereby driving the movable plate 8 to rotate. The opening degree of the first pressure relief port 6 can be opened as needed, which is flexible and convenient.

[0055] In the optional technical solution of this embodiment, the negative pressure cavity is a vacuum cavity 13.

[0056] In this embodiment, high-pressure nitrogen is introduced into the nitrogen inlet 3, resulting in a large pressure difference. This allows the cold chamber body 1 to be quickly filled to the set oil level pressure, enabling the workpiece to be quickly immersed in oil and complete the quenching process. The purpose of using the vacuum chamber 13 is that its strong vacuum suction can quickly draw in the oil fumes released instantaneously during quenching. When the actual pressure inside the cold chamber body 1 is much higher than the set pressure, the first pressure relief port 6 is fully opened by the adjusting mechanism. When the actual pressure inside the cold chamber body 1 is lower than the set pressure, the first pressure relief port 6 is fully closed by the adjusting mechanism. When the actual pressure inside the cold chamber body 1 is slightly higher than the set pressure, the opening percentage of the first pressure relief port 6 is controlled by the adjusting mechanism to ultimately stabilize the pressure at the set pressure value. The vacuum in vacuum chamber 13 is ensured to be maintained for each equipment process cycle. Before removing the workpiece from furnace door 5, a vacuum is evacuated from the cold chamber body 1, and the first pressure relief port 6 is opened, connecting the cold chamber body 1 and vacuum chamber 13. This is to expel all nitrogen gas and the large amount of oil fumes generated during quenching from both the cold chamber body 1 and vacuum chamber 13. After reaching 5 Pa, the vacuum evacuation of the cold chamber body 1 is stopped, and the first pressure relief port 6 is closed, disconnecting the cold chamber body 1 from vacuum chamber 13. The cold chamber body 1 is then filled with nitrogen to atmospheric pressure, and furnace door 5 is opened to remove the workpiece. Thus, when the next batch of workpieces undergoes oil quenching, the vacuum chamber 13, being under vacuum, also functions as a vacuum suction system.

[0057] This embodiment is not limited to this; the vacuum chamber 13 can also be evacuated separately by an external vacuum pumping device.

[0058] In this optional embodiment, the volume of the vacuum chamber 13 is greater than or equal to the volume of the cold chamber body 1, effectively ensuring the pressure relief function.

[0059] This embodiment provides an oil quenching furnace, including the aforementioned oil quenching furnace cold chamber pressure regulating device. Therefore, the technical advantages and effects achieved by the oil quenching furnace include those achieved by the aforementioned oil quenching furnace cold chamber pressure regulating device, which will not be elaborated here.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An oil quenching furnace cooling chamber pressure regulating device, characterized by, include: The cold chamber body (1), the negative pressure chamber and the regulating mechanism; The cold chamber body (1) is provided with a furnace door (2), a nitrogen inlet (3), a first pressure relief port (6) and a pressure sensor (4). A furnace door (5) is provided at the furnace door (2). An oil tank (14) is provided below the cold chamber body (1). The pressure sensor (4) is used to detect the pressure inside the cold chamber body (1). The negative pressure cavity is located outside the cold chamber body (1), and a second pressure relief port is provided on the negative pressure cavity, and the second pressure relief port is connected to the first pressure relief port (6). The adjustment mechanism is disposed at the first pressure relief port (6), and the adjustment mechanism is used to adjust the opening degree of the first pressure relief port (6); and / or; The adjustment mechanism is located at the second pressure relief port, and the adjustment mechanism is used to adjust the opening degree of the second pressure relief port.

2. The oil quench furnace cold room pressure regulating device of claim 1, wherein, It also includes a control module; The adjustment mechanism is electrically connected to the control module. Under the action of the control module, the adjustment mechanism is driven to reciprocate to adjust the opening degree of the corresponding pressure relief port.

3. The oil quench furnace cold room pressure regulating device of claim 2, wherein, It also includes the mounting plate (7); The cold chamber body (1) is provided with a connection port, and the second pressure relief port is connected to the connection port; The mounting plate (7) is disposed inside the cold chamber body (1) and connected to the connection port. The mounting plate (7) is provided with the first pressure relief port (6). The adjustment mechanism includes a movable plate (8) and a driver. The movable plate (8) is located at the first pressure relief port (6). The driver is electrically connected to the control module and is used to drive the movable plate (8) to reciprocate so as to adjust the opening of the first pressure relief port (6).

4. The oil quench furnace cold room pressure regulating device of claim 3, wherein, The adjustment mechanism also includes a mounting bracket (9), and the driver is a telescopic motor (10); The mounting bracket (9) and the telescopic motor (10) are both located inside the cold chamber body (1), and the telescopic motor (10) is mounted on the first pressure relief port (6) via the mounting bracket (9); The output end of the telescopic motor (10) is connected to the movable plate (8).

5. The pressure regulating device for the cold chamber of the oil quenching furnace according to claim 4, characterized in that, The adjustment mechanism also includes a hinge (11), and the movable plate (8) is connected to the mounting plate (7) via the hinge (11).

6. The oil quench furnace cold room pressure regulating device of claim 4, wherein, The mounting bracket (9) includes four legs (12). One end of each of the four legs (12) is connected to the mounting plate (7) and is evenly spaced around the first pressure relief port (6). The other end of each of the four legs (12) is connected to the body of the telescopic motor (10).

7. The oil quench furnace cold room pressure regulating device of claim 3, wherein, The adjustment mechanism also includes a rotating shaft, and the driver is a rotary motor; The movable plate (8) is rotatably connected to the mounting plate (7) via the rotating shaft; The output end of the rotary motor is connected to the rotating shaft.

8. The oil quench furnace cold hearth pressure regulating apparatus of any one of claims 1-7, wherein, The negative pressure cavity is a vacuum cavity (13).

9. The oil quench furnace cold room pressure regulating device of claim 8, wherein, The container of the vacuum chamber (13) is greater than or equal to the volume of the cold chamber body (1).

10. An oil quenching furnace, characterized by Includes the pressure regulating device for the cold chamber of the oil quenching furnace as described in any one of claims 1-9.

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