Online oil discharge device of vacuum unit

Abstract

The utility model relates to the field of wax product processing equipment, and discloses an online oil discharge device of a vacuum unit, which comprises a vacuum unit main body, a connecting pipe, a cooling pipe, a cooling water circulation system, an oil discharge tank, a communicating pipe, a blow-down pipe and a valve I, according to the utility model, non-condensable gas in the pipeline can be condensed and then stored in the connecting pipe, and condensed water can be guided into the oil discharge tank through the communicating pipe, so that the conditions of pipeline blockage and oil pollution of the vacuum pump are avoided, and the vacuumizing capacity of the vacuum unit main body is ensured.

Description

Technical Field

[0001] The utility model relates to the field of wax product processing equipment, in particular to an online oil discharge device for a vacuum unit. Background Art

[0002] The raw materials are pressurized by the feed pump and sent to the first-level membrane feed preheater from the tank area. The materials are instantly heated by the membrane feed preheater, and the light components are condensed and cooled by the condenser and then enter the membrane light phase collection tank, and then are produced out of the tank area by the membrane light phase production pump.

[0003] The whole vacuum unit is mainly composed of one, two and three-stage Roots pumps and liquid ring pumps. The inlet of the first-stage Roots pump is connected to the film feed preheater, and the outlet is connected to the inlet of the second-stage Roots pump. The outlet of the second-stage Roots pump is connected to the inlet of the third-stage Roots pump through a pipeline, and the outlet of the third-stage Roots pump is connected to the inlet of the liquid ring pump. The vacuum unit mainly provides vacuum for the film feed preheater. During the vacuum pumping process, some non-condensable gas enters the vacuum unit. After condensation, it will remain in the unit pipeline and cause pipeline blockage, and even enter the liquid ring pump to cause vacuum pump oil pollution, which reduces the vacuum pumping capacity of the vacuum unit, thereby reducing the vacuum degree of the film feed preheater. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide an online oil discharge device for a vacuum unit to solve the problems existing in the above-mentioned prior art.

[0005] The utility model adopts the following technical solutions:

[0006] The utility model provides an online oil discharge device for a vacuum unit, comprising a vacuum unit main body, and further comprising:

[0007] A connecting pipe, the connecting pipe is detachably connected to the pipeline of the vacuum unit body, a cooling pipe is arranged in the connecting pipe, and both ends of the cooling pipe are respectively sealed and penetrate to the outside of the connecting pipe and are connected to the cooling water circulation system;

[0008] The oil drain tank is arranged below the connecting pipe, one side of the top of the oil drain tank is connected to the bottom of the connecting pipe through a connecting pipe, and a vent pipe is arranged on the other side of the top, and valve 1 is arranged on the connecting pipe and the vent pipe.

[0009] Furthermore, an oil drain pipe is provided at the bottom of one side of the oil drain tank, and a second valve is provided on the oil drain pipe.

[0010] Furthermore, a plurality of supporting legs are provided at the bottom of the oil drain tank.

[0011] Furthermore, the cooling pipe is configured as a U-shaped structure.

[0012] Furthermore, a vacuum sensor is provided on the pipeline, a valve three is provided on the connecting pipe, and the vacuum sensor and the valve three are electrically connected to the controller respectively.

[0013] Compared with the prior art, the beneficial technical effects of the utility model are:

[0014] By means of the connecting pipe, cooling pipe, cooling water circulation system, oil drain tank, connecting pipe, vent pipe and valve 1, the non-condensable gas in the pipeline can be condensed and retained in the connecting pipe, and the condensed water can be introduced into the oil drain tank through the connecting pipe, thus avoiding pipeline blockage and vacuum pump oil contamination, thereby ensuring the vacuum pumping capacity of the vacuum unit body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural schematic diagram of an online oil discharge device for a vacuum unit according to Embodiment 1 of the present utility model;

[0017] Figure 2 This is a structural schematic diagram of an online oil discharge device for a vacuum unit according to a second embodiment of the utility model.

[0018] Explanation of the reference numerals: 1. Vacuum unit body; 101. First-stage Roots pump; 102. Second-stage Roots pump; 103. Pipeline; 2. Connecting pipe; 3. Cooling pipe; 4. Oil drain tank; 5. Connecting pipe; 6. Vent pipe; 7. Valve one; 8. Oil drain pipe; 9. Valve two; 10. Support leg; 11. Vacuum sensor; 12. Valve three. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Embodiment 1

[0021] like Figure 1 As shown, the present embodiment discloses an online oil drain device for a vacuum unit, comprising a vacuum unit main body 1, a connecting pipe 2 is detachably connected to the pipeline 103 of the vacuum unit main body 1, a cooling pipe 3 is arranged in the connecting pipe 2, both ends of the cooling pipe 3 are respectively sealed and penetrate to the outside of the connecting pipe 2 and are connected to the cooling water circulation system; an oil drain tank 4 is arranged below the connecting pipe 2, one side of the top of the oil drain tank 4 is fixedly connected to the bottom of the connecting pipe 2 through a connecting pipe 5, and the other side of the top is fixedly connected to a vent pipe 6, and valves 7 are fixedly installed on the connecting pipe 5 and the vent pipe 6.

[0022] In this embodiment, the connecting pipe 2 is detachably connected to the pipeline 103 by means of a flange connection, the diameter of the connecting pipe 2 is larger than the diameter of the pipeline 103, and the bottom surface of the connecting pipe 2 is located below the bottom surface of the pipeline 103; the cooling pipe 3 is arranged as a U-shaped structure, and the two side walls of the cooling pipe 3 are fixedly connected to the connecting pipe 2; the cooling water circulation system can introduce cooling water from one end of the cooling pipe 3 into the cooling pipe 3, and can make the water in the cooling pipe 3 flow back to the cooling water circulation system, and after the cooling treatment of the cooling water circulation system, it can be introduced into the cooling pipe 3 again.

[0023] Further optimize the scheme, the bottom of one side of the oil drain tank 4 is fixedly connected with an oil drain pipe 8, and a valve 2 9 is fixedly installed on the oil drain pipe 8. A plurality of legs 10 are fixed at the bottom of the oil drain tank 4.

[0024] The working process of the above technical solution is as follows: first, connect the connecting pipe 2 to the pipeline 103 of the vacuum unit, and then connect the two ends of the cooling pipe 3 to the cooling water circulation system respectively; close the valve 17 on the vent pipe 6 and the valve 29 on the oil drain pipe 8, open the valve 17 on the connecting pipe 5, start the cooling water circulation system to introduce cooling water into the cooling pipe 3, start the vacuum unit body 1 to evacuate, and when the inside of the pipeline 103, the connecting pipe 2, the connecting pipe 5 and the oil drain tank 4 are all in a vacuum environment, close the valve 17 on the connecting pipe 5; then, the vacuum unit body 1 is in a vacuum state. During normal operation, some non-condensable gas will enter the pipeline 103, and this part of the non-condensable gas will form condensate under the cooling effect of the cooling pipe 3 and store at the bottom of the connecting pipe 2; when the condensate retained in the connecting pipe 2 reaches a certain amount, the vacuum degree in the connecting pipe 2 and the pipeline 103 decreases. At this time, open the valve 7 on the connecting pipe 5, and the connecting pipe 2 and the inside of the oil drain tank 4 will form the same pressure. The condensate at the bottom of the connecting pipe 2 will flow into the oil drain tank 4 under the action of gravity; after the vacuum degree in the connecting pipe 2 and the pipeline 103 returns to normal, close the valve 7 to continue normal operation.

[0025] It should be noted that, since the bottom surface of the connecting pipe 2 is located below the bottom surface of the pipeline 103, the condensate is retained in the bottom area of ​​the connecting pipe 2, and its liquid level is lower than the inner bottom surface of the pipeline 103; during the whole process, the condensate will not enter the liquid ring pump through the pipeline 103. The cooling water circulation system is a prior art, and its working principle and use method are known.

[0026] It should be noted that the condensate in the oil drain tank 4 needs to be discharged regularly. When discharging, close valve 17 on the connecting pipe 5, open valve 17 on the vent pipe 6, so that the interior of the oil drain tank 4 is connected to the outside, and then open valve 29 on the oil drain pipe 8 to discharge the condensate inside the oil drain tank 4; after the condensate is discharged, close valve 17 on the vent pipe 6 and valve 29 on the oil drain pipe 8, open valve 17 on the connecting pipe 5, start the vacuum unit main body 1 to evacuate, and when the pipeline 103, the connecting pipe 2, the connecting pipe 5 and the interior of the oil drain tank 4 are all in a vacuum environment, close valve 17 on the connecting pipe 5, and then the vacuum unit main body 1 operates normally.

[0027] Through the arrangement of the above-mentioned structure, the first embodiment of the present invention can condense the non-condensable gas in the pipeline 103 and retain it in the connecting pipe 2, and can introduce the condensed water into the oil drain tank 4 through the connecting pipe 5, thereby avoiding the blockage of the pipeline 103 and the oil contamination of the vacuum pump, thereby ensuring the vacuum pumping ability of the vacuum unit main body 1.

[0028] Embodiment 2

[0029] like Figure 2 As shown, based on the above-mentioned embodiment 1, the difference between this embodiment 2 and embodiment 1 is that: in this embodiment 2, a vacuum sensor 11 is fixedly installed on the pipeline 103, and a valve three 12 is fixedly installed on the connecting pipe 5, and the vacuum sensor 11 and the valve three 12 are electrically connected to the controller respectively.

[0030] In the second embodiment, the vacuum sensor 11 is located on the side of the connecting pipe 2 close to the secondary Roots pump 102, and the valve three 12 is set as a pneumatic valve. The vacuum sensor 11 is used to detect the vacuum degree inside the pipeline 103 and the connecting pipe 2, and send a signal to the controller. The controller can receive the signal of the vacuum sensor 11 and can control the valve three 12 to open or close.

[0031] The working process of the second embodiment is as follows: first, connect the connecting pipe 2 to the pipeline 103 of the vacuum unit, and then connect the two ends of the cooling pipe 3 to the cooling water circulation system respectively; close the valve 1 7 on the vent pipe 6 and the valve 2 9 on the oil drain pipe 8, open the valve 1 7 and the valve 3 12 on the connecting pipe 5, start the cooling water circulation system to introduce cooling water into the cooling pipe 3, start the vacuum unit body 1 to evacuate, and when the interior of the pipeline 103, the connecting pipe 2, the connecting pipe 5 and the oil drain tank 4 are all in a vacuum environment, close the valve 3 12 on the connecting pipe 5; thereafter, the vacuum unit body 1 operates normally, and some non-condensable gas will enter the pipeline 103 during the process. , this part of the non-condensable gas forms condensate under the cooling effect of the cooling pipe 3 and is stored at the bottom of the connecting pipe 2; when the condensate retained in the connecting pipe 2 reaches a certain amount, the vacuum sensor 11 detects that the vacuum degree in the connecting pipe 2 and the pipeline 103 decreases, and sends a signal to the controller. After receiving the signal from the vacuum sensor 11, the controller automatically controls the valve three 12 on the connecting pipe 5 to open. At this time, the connecting pipe 2 and the inside of the oil drain tank 4 form the same pressure, and the condensate at the bottom of the connecting pipe 2 flows into the oil drain tank 4 under the action of gravity; after the vacuum sensor 11 detects that the vacuum degree in the connecting pipe 2 and the pipeline 103 returns to normal, the controller controls the valve three 12 to close.

[0032] It should be noted that the condensate in the oil drain tank 4 needs to be discharged regularly. During the discharge, the controller controls the valve three 12 to be closed, opens the valve one 7 on the vent pipe 6, so that the interior of the oil drain tank 4 is connected to the outside, and then opens the valve two 9 on the oil drain pipe 8 to discharge the condensate inside the oil drain tank 4; after the condensate is discharged, close the valve one 7 on the vent pipe 6 and the valve two 9 on the oil drain pipe 8, open the valve three 12 on the connecting pipe 5 through the controller, start the vacuum unit main body 1 to evacuate, and when the pipeline 103, the connecting pipe 2, the connecting pipe 5 and the interior of the oil drain tank 4 are all in a vacuum environment, close the valve three 12 on the connecting pipe 5 through the controller, and then the vacuum unit main body 1 operates normally.

[0033] Compared with the first embodiment, the second embodiment can automatically discharge the condensate retained in the connecting pipe 2 into the oil drain tank 4 through the arrangement of the above structure.

[0034] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. An online oil discharge device for a vacuum unit, comprising a vacuum unit body (1), characterized in that: Also includes: A connecting pipe (2), the connecting pipe (2) being detachably connected to the pipeline (103) of the vacuum unit body (1), a cooling pipe (3) being arranged in the connecting pipe (2), and both ends of the cooling pipe (3) being respectively sealed and penetrated to the outside of the connecting pipe (2) and connected to a cooling water circulation system; An oil drain tank (4) is arranged below the connecting pipe (2); one side of the top of the oil drain tank (4) is connected to the bottom of the connecting pipe (2) via a connecting pipe (5); a vent pipe (6) is arranged on the other side of the top; and valves (7) are arranged on the connecting pipe (5) and the vent pipe (6).

2. The vacuum unit online oil discharge device according to claim 1 is characterized in that: An oil drain pipe (8) is provided at the bottom of one side of the oil drain tank (4), and a second valve (9) is provided on the oil drain pipe (8).

3. The vacuum unit online oil discharge device according to claim 2 is characterized in that: The bottom of the oil drain tank (4) is provided with a plurality of supporting legs (10).

4. The vacuum unit online oil discharge device according to claim 1 is characterized in that: The cooling pipe (3) is arranged in a U-shaped structure.

5. The vacuum unit online oil discharge device according to claim 1 is characterized in that: The pipeline (103) is provided with a vacuum sensor (11), and the connecting pipe (5) is provided with a valve three (12). The vacuum sensor (11) and the valve three (12) are electrically connected to the controller respectively.

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