Exhaust pipeline of vertical oil cooler of main engine of steam turbine

Abstract

The utility model discloses an exhaust pipeline of a vertical oil cooler of a main machine of a steam turbine, which belongs to the technical field of oil coolers, and comprises an oil cooler main body, and a water inlet, a water outlet, an oil inlet and an oil outlet which are communicated and connected with the oil cooler main body, the oil outlet is connected with a connecting pipe through a flange, the connecting pipe is connected with an exhaust pipe body in a communicating mode, the inner side of a top opening of the exhaust pipe body is detachably connected with a housing, the two ends of the housing are arranged to be of a communicating structure, the inner side of the housing is symmetrically and fixedly connected with metal meshes, and an oil separation breathable film is compounded between the metal meshes. A support fixedly connected with the connecting pipe is arranged on one side of the exhaust pipe body, the top end of the support is fixedly connected with a vacuum pump through a support, lubricating oil is placed under the negative pressure of-0.08 MPa through the vacuum pump, the bubble removing efficiency can reach 95% or above, the cooling effect of the lubricating oil is guaranteed, and the oil temperature of the lubricating oil is prevented from being too high.

Description

Technical Field

[0001] The utility model relates to the technical field of oil coolers, and more specifically, to an exhaust pipe line of a vertical oil cooler for a steam turbine main engine. Background Technique

[0002] An oil cooler is a turbine oil cooling device supporting a steam turbine, mainly used for controlling the temperature of lubricating oil in a power system. By means of the heat exchange between circulating water and oil, the oil temperature at the bearing inlet is maintained at 35 - 45 °C to ensure the safe operation of the unit. Its main structure consists of upper / lower water chambers and a shell pipe system. The heat exchange elements mostly adopt copper tubes, and stainless steel or brass materials can also be selected. The installation forms are divided into two categories: vertical and horizontal.

[0003] During maintenance or standby periods, a large amount of air often accumulates on the oil side of the oil cooler. The existence of this air will affect the normal operation of the oil side. If the oil side is directly put into operation without completely discharging the air, a series of problems may occur. For example, the oil pressure will fluctuate violently. Such fluctuations will not only affect the normal operation of the equipment but may also lead to more serious consequences, such as bearing oil starvation or low oil pressure trip accidents. Therefore, we propose an exhaust pipe line of a vertical oil cooler for a steam turbine main engine to solve the above existing problems. Content of the Utility Model

[0004] 1. Technical Problem to be Solved

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide an exhaust pipe line of a vertical oil cooler for a steam turbine main engine. It places the lubricating oil under a negative pressure of -0.08 MPa through a vacuum pump, and the bubble removal efficiency can reach over 95%, ensuring the cooling effect of the lubricating oil and preventing the oil temperature of the lubricating oil from being too high.

[0006] Technical Solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] An exhaust pipe line of a vertical oil cooler for a steam turbine main engine includes an oil cooler main body, as well as a water inlet, a water outlet, an oil inlet, and an oil outlet that are conductively connected to the oil cooler main body. A connecting pipe is connected to the oil outlet through a flange, and an exhaust pipe main body is conductively connected to the connecting pipe;

[0009] The inner side of the top port of the exhaust pipe main body is detachably connected with a housing with both ends in a conductive structure. Symmetrically fixed inside the housing are metal mesh sheets, and an oil separation and air permeable membrane is compounded between the metal mesh sheets;

[0010] A bracket is provided on one side of the exhaust pipe body and is fixedly connected to the connecting pipe. A vacuum pump is fixedly connected to the top of the bracket via a support. The input end of the vacuum pump is connected to a vacuum pumping pipe, and the vacuum pumping pipe is connected to the top of the exhaust pipe body via a flange.

[0011] Furthermore, both ends of the connecting pipe are provided with inlay grooves, and a first sealing gasket is inlaid on the inner side of the inlay groove.

[0012] Furthermore, a base is welded to the bottom of the bracket, and mounting holes are symmetrically provided on the edge of the base.

[0013] Furthermore, a pressure gauge is installed on the vacuum tube.

[0014] Furthermore, a sealing ring is embedded in the outer wall of the top opening of the cover, and the sealing ring is tightly fitted to the inner wall of the top opening of the exhaust pipe body.

[0015] Furthermore, a second sealing gasket is embedded at the top of the exhaust pipe body, and the second sealing gasket is used to fill the gap between the exhaust pipe body and the vacuum pipe.

[0016] Furthermore, the output end of the vacuum pump is equipped with an exhaust pipe with a closed end, and an automatic pressure relief valve is installed on the exhaust pipe.

[0017] Beneficial effects

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] (1) In this scheme, the lubricating oil enters through the oil inlet and is cooled by the main body of the oil cooler. During the process of being discharged through the oil outlet, the vacuum pump is turned on. The connecting pipe and the main body of the exhaust pipe are used to perform vacuum treatment on the oil side of the main body of the oil cooler. The metal mesh located inside the cover supports the oil-separating and breathable membrane. At the same time, the oil-separating and breathable membrane blocks the lubricating oil and causes the air in the lubricating oil to be released under the action of vacuum. The vacuum pump has a vacuum chamber inside, and the air in the lubricating oil is extracted by mechanical suction, thereby achieving the purpose of removing air. The lubricating oil is placed under a negative pressure of -0.08MPa by the vacuum pump 11, and the bubble removal efficiency can reach more than 95%, ensuring the cooling effect of the lubricating oil and preventing the oil temperature from being too high.

[0020] (2) In this scheme, the gap between the pipe connection parts is filled by the first sealing gasket and the second sealing gasket, thereby ensuring the sealing effect of the pipe connection parts, which is conducive to the vacuuming work of the oil side inside the oil cooler body. Attached Figure Description

[0021] Figure 1This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the connecting pipe structure of this utility model;

[0023] Figure 3 This is a front view schematic diagram of the exhaust pipe of this utility model;

[0024] Figure 4 This is a cross-sectional view of the exhaust pipe AA section of this utility model;

[0025] Figure 5 This is an enlarged schematic diagram of part A of the present invention.

[0026] Explanation of the labels in the diagram:

[0027] 1. Main body of oil cooler; 2. Water inlet; 3. Water outlet; 4. Oil inlet; 5. Oil outlet; 6. Connecting pipe; 7. Main body of exhaust pipe; 8. First sealing gasket; 9. Bracket; 10. Base; 11. Vacuum pump; 12. Vacuum tube; 13. Pressure gauge; 14. Cover; 15. Metal mesh; 16. Oil-separating and breathable membrane; 17. Sealing ring; 18. Second sealing gasket. Detailed Implementation

[0028] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] Example:

[0030] Please see Figure 1-5 An exhaust pipe for a vertical oil cooler for a steam turbine main unit includes an oil cooler body 1 and an inlet 2, an outlet 3, an oil inlet 4, and an oil outlet 5 that are connected to the oil cooler body 1. A connecting pipe 6 is connected to the oil outlet 5 via a flange, and an exhaust pipe body 7 is connected to the connecting pipe 6.

[0031] The exhaust pipe body 7 has a cover 14 with both ends having a through structure that can be detachably connected to the inner side of the top opening. Metal mesh 15 is symmetrically fixed to the inner side of the cover 14, and an oil-proof and breathable membrane 16 is laminated between the metal mesh 15.

[0032] A bracket 9 is provided on one side of the exhaust pipe body 7 and is fixedly connected to the connecting pipe 6. A vacuum pump 11 is fixedly connected to the top of the bracket 9 through a support. A vacuum pump 12 is connected to the input end of the vacuum pump 11 and the vacuum pump 12 is connected to the top of the exhaust pipe body 7 through a flange.

[0033] It should be noted that during the operation of the exhaust pipe of the vertical oil cooler for the main turbine, the lubricating oil enters through the oil inlet 4, is cooled by the main body 1 of the oil cooler, and is discharged through the oil outlet 5. During this process, the vacuum pump 11 is turned on, and the connecting pipe 6, together with the exhaust pipe body 7, performs vacuum treatment on the oil side of the main body 1 of the oil cooler. The metal mesh 15 located inside the cover 14 supports the oil-separating and breathable membrane 16, while the oil-separating and breathable membrane 16 blocks the lubricating oil. At the same time, the air in the lubricating oil is released under the action of vacuum. The vacuum pump 11 has a vacuum chamber inside, and the air in the lubricating oil is extracted by mechanical suction, thereby achieving the purpose of removing air. By placing the lubricating oil under a negative pressure of -0.08MPa through the vacuum pump 11, the bubble removal efficiency can reach more than 95%, ensuring the cooling effect of the lubricating oil and preventing the oil temperature from becoming too high.

[0034] like Figure 1 , Figure 2 As shown, both ends of the connecting pipe 6 are provided with inlay grooves, and the inner side of the inlay groove is inlaid with a first sealing gasket 8. The top of the exhaust pipe body 7 is inlaid with a second sealing gasket 18, and the second sealing gasket 18 is used to fill the gap between the exhaust pipe body 7 and the vacuum pipe 12.

[0035] It should be noted that by filling the gap at the pipe connection point with the first sealing gasket 8 and the second sealing gasket 18, the sealing effect at the pipe connection point is ensured, which is beneficial to the vacuuming operation of the oil side inside the oil cooler body 1.

[0036] like Figure 1 As shown, a base 10 is welded to the bottom of the bracket 9, and mounting holes are symmetrically opened on the edge of the base 10.

[0037] It should be noted that by using the base 10 to fix the bracket 9, a stable support for the vacuum pump 11 is ensured.

[0038] like Figure 2 , Figure 3 As shown, a pressure gauge 13 is installed on the vacuum tube 12, and an exhaust pipe with a closed end is installed at the output end of the vacuum pump 11, and an automatic pressure relief valve is installed on the exhaust pipe.

[0039] It should be noted that the pressure in the oil side inside the main body 1 of the oil cooler is monitored in real time by pressure gauge 13, and the air released from the lubricating oil is discharged through the automatic pressure relief valve.

[0040] like Figure 5 As shown, a sealing ring 17 is embedded in the outer wall of the top opening of the cover 14, and the sealing ring 17 is tightly fitted to the inner wall of the top opening of the exhaust pipe body 7.

[0041] It should be noted that the gap between the top of the cover 14 and the joint of the exhaust pipe body 7 can be filled, thereby effectively preventing lubricating oil from seeping out.

[0042] During use: Lubricating oil enters through the oil inlet 4, is cooled by the main body 1 of the oil cooler, and is discharged through the oil outlet 5. During this process, the vacuum pump 11 is turned on, and the connecting pipe 6, together with the exhaust pipe main body 7, performs vacuum treatment on the oil side of the oil cooler main body 1. The metal mesh 15 located inside the cover 14 supports the oil-separating and breathable membrane 16, while the oil-separating and breathable membrane 16 blocks the lubricating oil. At the same time, the air in the lubricating oil is released under the action of vacuum. The vacuum pump 11 has a vacuum chamber inside, and the air in the lubricating oil is extracted by mechanical suction, thereby achieving the purpose of removing air. The vacuum pump 11 places the lubricating oil under a negative pressure of -0.08MPa, and the bubble removal efficiency can reach more than 95%, ensuring the cooling effect of the lubricating oil and preventing the lubricating oil temperature from becoming too high.

[0043] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. An exhaust pipe for a vertical oil cooler of a steam turbine main unit, comprising an oil cooler body (1) and an inlet (2), an outlet (3), an oil inlet (4), and an oil outlet (5) connected in a conductive manner to the oil cooler body (1), characterized in that: The oil outlet (5) is connected to a connecting pipe (6) via a flange, and the connecting pipe (6) is connected to an exhaust pipe body (7). The exhaust pipe body (7) has a cover (14) detachably connected to the inner side of the top opening, both ends of which are configured as a conductive structure. The inner side of the cover (14) is symmetrically fixed with metal mesh (15), and an oil-proof and breathable membrane (16) is laminated between the metal mesh (15). A bracket (9) is provided on one side of the exhaust pipe body (7) and is fixedly connected to the connecting pipe (6). A vacuum pump (11) is fixedly connected to the top of the bracket (9) through a support. A vacuum pump (12) is connected to the input end of the vacuum pump (11) through a vacuum tube (12), and the vacuum tube (12) is connected to the top of the exhaust pipe body (7) through a flange.

2. The exhaust pipe of a vertical oil cooler for a steam turbine main unit according to claim 1, characterized in that: Both ends of the connecting pipe (6) are provided with inlay grooves, and the inner side of the inlay groove is inlaid with a first sealing gasket (8).

3. The exhaust pipe of a vertical oil cooler for a steam turbine main unit according to claim 1, characterized in that: The bottom end of the bracket (9) is welded with a base (10), and the edge of the base (10) is symmetrically provided with assembly holes.

4. The exhaust pipe of a vertical oil cooler for a steam turbine main unit according to claim 1, characterized in that: A pressure gauge (13) is installed on the vacuum tube (12).

5. The exhaust pipe of a vertical oil cooler for a steam turbine main unit according to claim 1, characterized in that: The outer wall of the top opening of the cover (14) is inlaid with a sealing ring (17), and the sealing ring (17) is tightly fitted to the inner wall of the top opening of the exhaust pipe body (7).

6. The exhaust pipe of a vertical oil cooler for a steam turbine main unit according to claim 1, characterized in that: The top of the exhaust pipe body (7) is inlaid with a second sealing gasket (18), and the second sealing gasket (18) is used to fill the gap between the exhaust pipe body (7) and the vacuum pipe (12).

7. The exhaust pipe of a vertical oil cooler for a steam turbine main unit according to claim 1, characterized in that: The vacuum pump (11) is equipped with an exhaust pipe with a closed end, and an automatic pressure relief valve is installed on the exhaust pipe.

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