Oil transfer device of vacuum oil quenching furnace

Abstract

The utility model discloses an oil transfer device of a vacuum oil quenching furnace, which comprises an oil quenching furnace oil groove, an oil storage tank and a vacuum pump set, the oil quenching furnace oil groove and the oil storage tank are directly connected with a communication pipeline and an oil transfer pipeline, and two ends of the communication pipeline are respectively connected with the upper end of the oil quenching furnace oil groove and the upper end of the oil storage tank. The two ends of the oil transfer pipeline are connected with the lower portion of the side face of the oil quenching furnace oil groove and the lower portion of the side face of the oil storage tank respectively, and an oil transfer valve is arranged on the oil transfer pipeline. Oil transfer is achieved through the vacuum pump set of the vacuum oil quenching furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum furnaces, and more particularly to an oil transfer device for a vacuum oil quenching furnace. Background Art

[0002] A vacuum oil quenching furnace is equipped with an oil storage tank. Quenching oil is typically transferred between the tank and the furnace using an oil pump. Specifically, two oil pumps are installed on the intermediate pipeline, one pump each being activated when transferring oil from the tank to the furnace or vice versa. This structure requires two oil pumps for oil transfer, which is relatively expensive. Furthermore, the presence of residual quenching scale in the quenching oil can damage the pumps and cause oil leaks. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide an oil transfer device for a vacuum oil quenching furnace.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses an oil transfer device for a vacuum oil quenching furnace, comprising an oil tank for the oil quenching furnace, an oil storage tank, and a vacuum pump group. The oil tank for the oil quenching furnace and the oil storage tank are directly connected with a connecting pipe and an oil transfer pipe, two ends of the connecting pipe are respectively connected with the upper end of the oil tank for the oil quenching furnace and the upper end of the oil storage tank, two ends of the oil transfer pipe are respectively connected with the side lower part of the oil tank for the oil quenching furnace and the side lower part of the oil storage tank, an oil transfer valve is provided on the oil transfer pipe, the vacuum pump group is connected with a vacuum pipe, the other end of the vacuum pipe is connected with the connecting pipe, a vacuum valve 1 and a vacuum valve 2 are provided on the connecting pipe, the upper end of the oil tank for the oil quenching furnace is connected with a vent pipe 1, a vent pipe 1 is provided with a vent valve 2, the upper end of the oil storage tank is connected with a vent pipe 2, and a vent pipe 2 is provided with a vent valve 1.

[0006] Furthermore, it also includes an air charging pipeline, and one end of the vent pipe away from the oil tank of the oil quenching furnace is connected to the air charging pipeline.

[0007] Furthermore, one end of the second vent pipe away from the oil storage tank is connected to the inflation pipeline.

[0008] Furthermore, the oil transfer valve is a pneumatic butterfly valve.

[0009] Furthermore, the vacuum pipe and the communication pipe are connected via a tee.

[0010] The beneficial effect of the utility model is that the quenching oil between the oil tank of the oil quenching furnace and the oil storage tank is transferred by using the vacuum pump group of the vacuum oil quenching furnace and the vacuum negative pressure suction method, thereby saving the cost of configuring an additional oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a structural schematic diagram of the oil transfer device of the vacuum oil quenching furnace in this embodiment.

[0012] Figure numerals: 1. Oil tank of oil quenching furnace; 2. Oil storage tank; 3. Vacuum pump group; 4. Oil transfer valve; 5. Oil transfer pipeline; 6. Vacuum valve one; 7. Vacuum valve two; 8. Vent valve one; 9. Vent valve two; 10. Connecting pipeline; 11. Inflating pipeline; 12. Vacuum pipeline; 13. Vent pipe one; 14. Vent pipe two. DETAILED DESCRIPTION

[0013] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0014] like Figure 1 As shown, an oil transfer device for a vacuum oil quenching furnace includes an oil quenching furnace oil tank 1, an oil storage tank 2, and a vacuum pump group 3. The oil quenching furnace oil tank 1 and the oil storage tank 2 are directly connected with a connecting pipe 10 and an oil transfer pipe 5. The two ends of the connecting pipe 10 are respectively connected to the upper end of the oil quenching furnace oil tank 1 and the upper end of the oil storage tank 2. The two ends of the oil transfer pipe 5 are respectively connected to the lower side of the oil quenching furnace oil tank 1 and the lower side of the oil storage tank 2. An oil transfer valve 4 is provided on the oil transfer pipe 5, and the oil transfer valve 4 is a pneumatic butterfly valve. The vacuum pump group 3 is connected to a vacuum pipe 12, the other end of the vacuum pipe 12 is connected to the connecting pipe 10, and the connecting pipe 10 is provided with a vacuum valve 16 and a vacuum valve 27. The vacuum valve 16 is located between the connection between the connecting pipe 10 and the oil tank 1 of the oil quenching furnace and the connection between the vacuum pipe 12 and the connecting pipe 10. The vacuum valve 27 is located between the connection between the connecting pipe 10 and the oil storage tank 2 and the connection between the vacuum pipe 12 and the connecting pipe 10. The upper end of the oil tank 1 of the oil quenching furnace is connected to a vent pipe 13, and a vent valve 29 is provided on the vent pipe 13. The upper end of the oil storage tank 2 is connected to a vent pipe 2 14, and a vent valve 8 is provided on the vent pipe 2 14.

[0015] The oil quenching furnace's oil tank 1 is connected to the vacuum pump unit 3 via a connecting pipe 10 and a vacuum pipe 12, forming a normal vacuum circuit for the oil quenching furnace. During equipment production, vacuum valve 1 (6) is opened, and the vacuum pump unit 3 is used to evacuate the oil quenching furnace's oil tank 1, extracting air from the tank 1. This allows workpieces to be processed in the vacuum environment within the tank 1, preventing oxidation. When the oil quenching furnace's oil tank 1 is undergoing maintenance and the quenching oil in the tank 1 needs to be transferred to the oil storage tank 2, vacuum valve 2 (7) is opened, vacuum valve 1 (6) is closed, and the vacuum pump unit 3 is activated to evacuate the oil storage tank 2. When the oil transfer valve 4 is opened, the pressure differential between the oil storage tank 2 and the oil quenching furnace's oil tank 1 causes the quenching oil in the tank 1 to be drawn into the oil storage tank 2 through the oil transfer pipe 5. Simultaneously, vent valve 2 (9) is opened to allow air to fill the space left by the oil being extracted. Preferably, an inert gas, such as helium, is introduced through the air filling pipe 11, allowing the inert gas to enter the oil quenching furnace's oil tank 1 to fill the space. The inert gas can protect the workpieces in the oil tank 1 of the oil quenching furnace and prevent the workpieces from being oxidized.

[0016] When the oil in the oil storage tank 2 needs to be transferred to the oil tank 1 of the oil quenching furnace, the operation is reversed and the vacuum pump group 3 is used to evacuate the oil tank 1 of the oil quenching furnace so that the oil in the oil storage tank 2 is sucked into the oil tank 1 of the oil quenching furnace through the oil transfer pipe 5.

[0017] The device also includes a gas charging line 11. Vent pipe 13 is connected to the gas charging line 11 at the end away from the oil quenching furnace oil tank 1. Vent pipe 2 is also connected to the gas charging line 11 at the end away from the oil storage tank 2. When the oil in the oil storage tank 2 is transferred to the oil quenching furnace oil tank 1, vent pipe 2 14 is connected to the gas charging line 11 to allow inert gas to enter.

[0018] The vacuum pipe 12 and the communication pipe 10 are connected via a tee to achieve communication between the two.

[0019] By increasing the diameter of the oil transfer pipe 5 , the speed of oil transfer can be increased without being limited by the oil pumping flow rate of the oil pump itself.

[0020] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An oil transfer device for a vacuum oil quenching furnace, characterized in that: The invention comprises an oil quenching furnace oil tank (1), an oil storage tank (2), and a vacuum pump group (3). The oil quenching furnace oil tank (1) and the oil storage tank (2) are directly connected to a connecting pipe (10) and an oil transfer pipe (5). The two ends of the connecting pipe (10) are respectively connected to the upper end of the oil quenching furnace oil tank (1) and the upper end of the oil storage tank (2). The two ends of the oil transfer pipe (5) are respectively connected to the lower side of the oil quenching furnace oil tank (1) and the lower side of the oil storage tank (2). The oil transfer pipe (5) is provided with an oil transfer valve (4). ), the vacuum pump group (3) is connected to a vacuum pipe (12), the other end of the vacuum pipe (12) is connected to a connecting pipe (10), the connecting pipe (10) is provided with a vacuum valve 1 (6) and a vacuum valve 2 (7), the upper end of the oil quenching furnace oil tank (1) is connected to a vent pipe 1 (13), the vent pipe 1 (13) is provided with a vent valve 2 (9), the upper end of the oil storage tank (2) is connected to a vent pipe 2 (14), the vent pipe 2 (14) is provided with a vent valve 1 (8).

2. The oil transfer device for a vacuum oil quenching furnace according to claim 1, characterized in that: It also includes an air charging pipeline (11), and one end of the vent pipe (13) away from the oil tank (1) of the oil quenching furnace is connected to the air charging pipeline (11).

3. The oil transfer device for a vacuum oil quenching furnace according to claim 2, characterized in that: The end of the second vent pipe (14) away from the oil storage tank (2) is connected to the inflation pipeline (11).

4. The oil transfer device for a vacuum oil quenching furnace according to claim 1, characterized in that: The oil transfer valve (4) is a pneumatic butterfly valve.

5. The oil transfer device for a vacuum oil quenching furnace according to any one of claims 1 to 3, characterized in that: The vacuum pipe (12) and the communication pipe (10) are connected via a tee.

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