Safety portable oil injection auxiliary device and oil injection system for high-pressure oil filter of steam turbine

Abstract

The utility model relates to a kind of safe portable steam turbine high-pressure oil filter oil injection auxiliary device, oil injection system, belong to the technical field of operation and maintenance of power plant steam turbine equipment.The utility model solves the technical problem of lower maintenance efficiency of existing system due to its own structure when needing to inject oil from standby oil tank or oil drum to EH system, three-way valve is provided with A, B and C, A is connected with the oil outlet of external EH oil supply device by connecting pipeline group, B is connected with the oil inlet of external anti-flame oil filter by connecting pipeline group;C is detachably connected with external oil source storage device by flexible pipeline;The switch mode of three-way valve has two kinds, one of which realizes the formation of online oil filtering loop between EH oil supply device and anti-flame oil filter;The other realizes that oil source storage device injects oil to EH oil supply device through anti-flame oil filter.The utility model is used for the operation and maintenance of power plant steam turbine.

Description

Technical Field

[0001] This utility model relates to a safe and portable oil injection auxiliary device and oil injection system for a high-pressure oil filter in a steam turbine, belonging to the field of operation and maintenance technology of steam turbine equipment in power plants. Background Technology

[0002] In power plants, turbine regulating systems and EH systems commonly use fire-resistant oil as the hydraulic medium. This system has extremely high requirements for oil cleanliness; poor oil quality can directly lead to wear and jamming of precision hydraulic components such as servo valves and hydraulic actuators, seriously affecting the safe and stable operation of the unit. Therefore, filtering and purifying the fire-resistant oil and replenishing or replacing the oil in the EH system's oil tank are crucial steps in unit overhaul or routine maintenance.

[0003] In existing technologies, independent fire-resistant oil filters are typically configured to perform online circulation filtration of the EH (Energy Hydraulic Heating) supply unit, i.e., the oil station, to maintain the operating oil quality. When oil needs to be added to the EH system from the spare oil tank or drum, there are generally two methods: one is to directly connect the oil via a temporary hose. This method easily introduces external contaminants into the system, and the particulate matter and moisture that may be present in the new oil itself can contaminate the system. After oil addition, a significant amount of time is required for system flushing to meet standards. The second method is to add oil through an oil filter, but each switch requires disassembling and reconnecting the pipeline, a cumbersome and time-consuming process. Repeated disassembly and reassembly can easily introduce contaminants and damage the joint seals. In addition, since power plant maintenance schedules are usually very tight, the lengthy oil flushing process is often difficult to guarantee, leading to an increased risk of substandard oil quality and shortening the life of hydraulic components.

[0004] In summary, when it is necessary to inject oil into the EH system from the spare oil tank or oil drum, the existing system has a technical problem of low maintenance efficiency due to its own structural reasons. Utility Model Content

[0005] This utility model aims to solve the technical problem of low maintenance efficiency of existing systems due to their own structural reasons when oil needs to be injected into the EH system from the spare oil tank or oil drum. Therefore, a safe and portable oil injection auxiliary device for steam turbine high pressure oil filter is proposed, which includes a three-way valve, flexible pipeline and connecting pipeline group. One end of the connecting pipeline assembly is connected to the oil outlet of the external EH oil supply device, and the other end of the connecting pipeline assembly is connected to the oil inlet of the external fire-resistant oil filter. The three-way valve is equipped with port A, port B and port C. Port A is connected to the oil outlet of the external EH oil supply device through a connecting pipeline assembly. Port B is connected to the oil inlet of the external fire-resistant oil filter through a connecting pipeline assembly. Port C is detachably connected to the external oil source storage device through a flexible pipeline. There are two ways to switch the three-way valve. One way is to connect ports A and B and close port C, thereby forming an online oil filtration circuit between the EH oil supply device and the fire-resistant oil filter. The other way is to connect ports C and B and close port A, thereby enabling the oil source storage device to inject oil into the EH oil supply device through the fire-resistant oil filter.

[0006] As another improvement of this utility model, it also includes a compression fitting, through which the flexible pipeline is detachably connected to an external oil source storage device.

[0007] As another improvement of this utility model, the flexible pipeline is characterized by being a metal flexible hose.

[0008] As another improvement of this utility model, the connecting pipeline assembly is characterized in that: The first pipeline section consists of a first pipe joint, a first stainless steel pipe, and a second pipe joint connected in sequence. The first pipe joint is used to connect to the EH oil supply device, and the second pipe joint is connected to port A of the three-way valve. The second pipeline section is composed of a third pipe connector, a second stainless steel pipe, and a fourth pipe connector connected in sequence. The third pipe connector is connected to port B of the three-way valve, and the fourth pipe connector is used to connect to the oil inlet of the fire-resistant oil filter.

[0009] As another improvement of this utility model, the connection method in which the first pipe joint, the first stainless steel pipe and the second pipe joint are connected in sequence is welding.

[0010] As another improvement of this utility model, the welding method for sequentially connecting the first pipe joint, the first stainless steel pipe and the second pipe joint is argon arc welding.

[0011] As another improvement of this utility model, the connection method in which the third pipe joint, the second stainless steel pipe and the fourth pipe joint are connected in sequence is welding.

[0012] As another improvement of this utility model, the welding method for sequentially connecting the third pipe joint, the second stainless steel pipe and the fourth pipe joint is argon arc welding.

[0013] As another improvement of this utility model, the oil source storage device is an oil drum or a spare oil tank.

[0014] This utility model also provides an oil injection system, which includes an EH oil supply device, a fire-resistant oil filter, and a safe and portable steam turbine high-pressure oil filter oil injection auxiliary device.

[0015] The beneficial effects of this utility model are: The turbine high-pressure oil filter oil injection auxiliary device set by this utility model can quickly switch between online oil filtration and oil injection modes without disassembling any main pipelines, avoiding the risk of contaminant intrusion and interface damage caused by repeated disassembly and assembly, and is simple and safe to operate.

[0016] In oil filling mode, external oil must be purified by an oil filter before entering the EH system. After oil filling is completed, the system can be immediately switched back to online oil filtration mode, restoring the EH system to a closed-loop state. This effectively isolates the operating system from the external environment, greatly reducing the risk of oil contamination during replenishment. The oil filling process itself is a purification process for the new oil, and the switching process is rapid and contamination-free. Therefore, it can significantly reduce or even eliminate the lengthy system flushing required after traditional oil filling, significantly improving maintenance efficiency and adapting to the tight maintenance schedules of power plants. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the equipment connection in the online oil filtration mode of a safe and portable steam turbine high-pressure oil filter auxiliary device according to this utility model.

[0018] Figure 2 This is a schematic diagram of the equipment connection of a safe and portable steam turbine high-pressure oil filter oil injection auxiliary device in the oil injection mode.

[0019] Figure 3 This is a schematic diagram of the first structure of a safe and portable oil injection auxiliary device for a steam turbine high-pressure oil filter.

[0020] Figure 4 This is a schematic diagram of the second structure of a safe and portable oil injection auxiliary device for a steam turbine high-pressure oil filter.

[0021] Figure 5 This is a schematic diagram of the third structure of a safe and portable oil injection auxiliary device for a steam turbine high-pressure oil filter. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Specific implementation method one: Combining Figures 1 to 5 This embodiment describes a safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine. It includes a three-way valve 4, a flexible pipeline 9, and a connecting pipeline assembly. The three-way valve can preferably be configured as a ball valve. One end of the connecting pipeline assembly is connected to the oil outlet of the external EH oil supply device, and the other end of the connecting pipeline assembly is connected to the oil inlet of the external fire-resistant oil filter. The three-way valve 4 is equipped with port A, port B and port C. Port A is connected to the oil outlet of the external EH oil supply device through the connecting pipeline group, port B is connected to the oil inlet of the external fire-resistant oil filter through the connecting pipeline group, and port C is detachably connected to the external oil source storage device through the flexible pipeline 9. The three-way valve 4 has two switching modes. One mode connects ports A and B and closes port C, thereby forming an online oil filtration circuit between the EH oil supply device and the fire-resistant oil filter. The other mode connects ports C and B and closes port A, thereby enabling the oil source storage device to inject oil into the EH oil supply device through the fire-resistant oil filter.

[0024] This implementation method allows for quick switching between online oil filtration and oil injection modes without disassembling any main pipelines, avoiding the risk of contaminant intrusion and interface damage caused by repeated disassembly and assembly, and is simple and safe to operate.

[0025] Specific Implementation Method Two: Combining Figures 1 to 5 This embodiment differs from specific embodiment one in that it also includes a compression fitting 8, and the flexible pipeline 9 is detachably connected to an external oil source storage device via the compression fitting 8. This design facilitates installation and maintenance. Other components and connection methods are the same as in specific embodiment one.

[0026] Specific implementation method three: Combining Figures 1 to 5 This embodiment differs from specific embodiment one in that the flexible conduit 9 is a metal flexible hose. Other components and connection methods are the same as in specific embodiment one or two.

[0027] Specific implementation method four: Combination Figures 1 to 5 This embodiment differs from specific embodiment one in that the connecting pipeline assembly includes: The first pipeline section is composed of a first pipe joint 1, a first stainless steel pipe 2, and a second pipe joint 3 connected in sequence. The first pipe joint 1 is used to connect to the EH oil supply device, and the second pipe joint 3 is connected to port A of the three-way valve 4. The second pipeline section is composed of a third pipe connector 5, a second stainless steel pipe 6, and a fourth pipe connector 7 connected in sequence. The third pipe connector 5 is connected to port B of the three-way valve 4, and the fourth pipe connector 7 is used to connect to the oil inlet of the fire-resistant oil filter.

[0028] During the online oil filtration process, firstly, the first interface fitting 1 of the device is reliably connected to the oil outlet of the turbine EH oil supply device via a flange or quick connector; the second interface fitting 7 is reliably connected to the oil inlet of the fire-resistant oil filter via a flange or quick connector. The operating handle of the three-way valve 4 is turned to the position where the first port A and the second port B are connected, and the third port C is closed. At this time, the oil pump and fire-resistant oil filter in the EH oil supply device are started. The fire-resistant oil in the EH system flows out from the oil supply device, passing sequentially through: the first stainless steel pipe 2 → the three-way ball valve 4 → the second stainless steel pipe 6, and then enters the fire-resistant oil filter for filtration and purification. The purified oil returns to the oil tank of the EH oil supply device through the oil outlet pipe and return pipe of the filter, thus forming a continuous online circulation filtration to maintain the cleanliness of the system oil. During the oil filling process, firstly, the free end of the metal hose 9, equipped with an oil suction filter head, is placed into the oil drum to be filled or connected to the oil outlet of the spare oil tank. Then, the operating handle of the three-way valve 4 is turned to the position where the third port C is connected to the second port B, and the first port A is closed. At this time, the fire-resistant oil filter is started; the filter usually has its own oil pump. The fire-resistant oil from the external oil source flows sequentially through: metal hose 9 → compression fitting 8 → three-way ball valve 4 → second stainless steel pipe 6, entering the fire-resistant oil filter. The oil undergoes precise filtration within the filter to remove particulate impurities and moisture, and then flows through the filter's outlet pipe and the EH system's return pipe into the EH oil supply device's tank, completing the purification and filling process.

[0029] After the oil filling task is completed, the three-way valve 4 can be switched back to the "AB open, C closed" online oil filtration mode. At this time, the metal hose 9 can be removed, or simply disconnected from the oil source, and the EH system will return to a safe closed-loop operation state. The entire mode switching process only requires the operation of one valve, which is quick and has no risk of contamination or leakage. Other components and connection methods are the same as any one of the specific implementation methods one to three.

[0030] Specific Implementation Method Five: Combining Figures 1 to 5 This embodiment differs from specific embodiment one in that the first pipe connector 1, the first stainless steel pipe 2, and the second pipe connector 3 are connected sequentially by welding. This design ensures convenient and reliable installation. Other components and connection methods are the same as any one of specific embodiments one through four.

[0031] Specific Implementation Method Six: Combination Figures 1 to 5 This embodiment differs from specific embodiment one in that the welding method used to sequentially connect the first pipe joint 1, the first stainless steel pipe 2, and the second pipe joint 3 is argon arc welding. This design ensures convenient and reliable installation. Other components and connection methods are the same as any one of specific embodiments one through five.

[0032] Specific implementation method seven: Combining Figures 1 to 5 This embodiment differs from specific embodiment one in that the third pipe connector 5, the second stainless steel pipe 6, and the fourth pipe connector 7 are connected by welding. This design makes installation convenient and reliable. Other components and connection methods are the same as any one of specific embodiments one through six.

[0033] Specific implementation method eight: Combination Figures 1 to 5 This embodiment differs from specific embodiment one in that the welding method used to sequentially connect the third pipe joint 5, the second stainless steel pipe 6, and the fourth pipe joint 7 is argon arc welding. This design ensures convenient and reliable installation. Other components and connection methods are the same as any one of specific embodiments one through seven.

[0034] Specific Implementation Method Nine: Combining Figures 1 to 5 This embodiment differs from specific embodiment one in that the oil source storage device is an oil drum or a spare oil tank. Other components and connection methods are the same as any one of specific embodiments one through eight.

[0035] Specific Implementation Method Ten: Combining Figures 1 to 5 This embodiment describes an oil injection system, which includes an EH oil supply device, a fire-resistant oil filter, and a safe portable steam turbine high-pressure oil filter oil injection auxiliary device as described in any one of embodiments one through nine. Other components and connection methods are the same as in any one of embodiments one through nine.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A safe and portable auxiliary device for oil injection in a high-pressure steam turbine oil filter, characterized in that... It includes a three-way valve (4), a flexible pipeline (9), and a connecting pipeline assembly; One end of the connecting pipeline assembly is connected to the oil outlet of the external EH oil supply device, and the other end of the connecting pipeline assembly is connected to the oil inlet of the external fire-resistant oil filter. The three-way valve (4) is equipped with port A, port B and port C. Port A is connected to the oil outlet of the external EH oil supply device through the connecting pipeline group, port B is connected to the oil inlet of the external fire-resistant oil filter through the connecting pipeline group, and port C is detachably connected to the external oil source storage device through the flexible pipeline (9). There are two ways to switch the three-way valve (4). One way is to connect port A and port B and close port C, thereby forming an online oil filtration circuit between the EH oil supply device and the fire-resistant oil filter. The other way is to connect port C and port B and close port A, thereby enabling the oil source storage device to inject oil into the EH oil supply device through the fire-resistant oil filter.

2. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 1, characterized in that... It also includes a ferrule (8), and a flexible pipeline (9) that is detachably connected to an external oil source storage device via the ferrule (8).

3. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 1, characterized in that... The flexible pipeline (9) is a metal flexible hose.

4. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 1, characterized in that... The connecting pipeline assembly includes: The first pipeline section is composed of a first pipe joint (1), a first stainless steel pipe (2), and a second pipe joint (3) connected in sequence. The first pipe joint (1) is used to connect to the EH oil supply device, and the second pipe joint (3) is connected to the A port of the three-way valve (4). The second pipeline section is composed of a third pipe connector (5), a second stainless steel pipe (6), and a fourth pipe connector (7) connected in sequence. The third pipe connector (5) is connected to the B port of the three-way valve (4), and the fourth pipe connector (7) is used to connect to the oil inlet of the fire-resistant oil filter.

5. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 4, characterized in that, The connection method in which the first pipe joint (1), the first stainless steel pipe (2), and the second pipe joint (3) are connected in sequence is welding.

6. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 5, characterized in that, The welding method for sequentially connecting the first pipe joint (1), the first stainless steel pipe (2), and the second pipe joint (3) is argon arc welding.

7. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 4, characterized in that, The connection method in which the third pipe joint (5), the second stainless steel pipe (6) and the fourth pipe joint (7) are connected in sequence is welding.

8. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 7, characterized in that, The welding method for sequentially connecting the third pipe joint (5), the second stainless steel pipe (6), and the fourth pipe joint (7) is argon arc welding.

9. The safe and portable oil injection auxiliary device for a high-pressure oil filter in a steam turbine according to claim 1, characterized in that, The oil storage device is an oil drum or a spare oil tank.

10. An oil injection system, the oil injection system comprising an EH oil supply device, a fire-resistant oil filter, and a safe portable steam turbine high-pressure oil filter oil injection auxiliary device as claimed in any one of claims 1 to 9.

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