Five-way valve for oil treatment of oil-immersed transformer

Abstract

The utility model discloses a five -way valve for oil -immersed transformer oil affair processing, including valve body, five pipeline interfaces are integrated on the valve body, are first interface, second interface, third interface, fourth interface and fifth interface respectively, first interface is structured for connecting transformer, and the second interface is connected with first manual valve, and is structured for connecting dry air gas source, third interface is structured for connecting monitoring instrument, and the fourth interface is connected with second manual valve, and is structured for connecting the load tap changer oil chamber of transformer, fifth interface is structured for connecting vacuumizing equipment, the utility model discloses through integrated five -way valve body structure, the multifunctional interface such as vacuumizing, injecting dry air, pressure monitoring required by transformer oil affair processing is gathered in one, realizes the quick, reliable switching among different working modes, and the efficiency and reliability of transformer operation and maintenance work have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer oil treatment equipment, and in particular to a five-way valve for treating oil in oil-immersed transformers. Background Technology

[0002] In the operation and maintenance of oil-immersed transformers in nuclear power plants, the purification of transformer insulating oil (such as oil filtration, degassing, and drying) is a crucial step in ensuring the safe operation of the transformer. Overhaul windows involving transformer oil treatment in nuclear power plants are typically long. To ensure the dryness of the transformer body, traditional methods usually require multiple alternating connections of a vacuum machine and a drying air source at the transformer oil tank flange. During operation, dry compressed air must be continuously supplied to the transformer, and during shutdowns, vacuum maintenance is required. Traditional methods have the following problems: 1. Low efficiency: Each switch between the vacuum machine and the dry air source requires disassembling and assembling the flange, which is cumbersome, time-consuming and labor-intensive.

[0003] 2. Extended construction period: Repeated disassembly and assembly work significantly increased the maintenance period and affected the progress of the main overhaul.

[0004] 3. Insufficient sealing: Frequent disassembly and assembly operations can easily damage the flange sealing surface, making it difficult to guarantee the long-term sealing reliability of the vacuum interface, and posing a risk of transformer getting damp or vacuum level decreasing. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a five-way valve for oil treatment of oil-immersed transformers.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to construct a five-way valve for oil treatment of oil-immersed transformers, including a valve body, on which five pipe interfaces are integrated, namely a first interface, a second interface, a third interface, a fourth interface and a fifth interface; The first interface is configured for connecting a transformer; The second interface is connected to a first manual valve and is configured to connect to a dry air source; The third interface is configured to connect to monitoring instruments; The fourth interface is connected to a second manual valve and is configured to connect to the on-load tap changer oil chamber of the transformer. The fifth interface is configured for connecting a vacuum pumping device.

[0007] Furthermore, the first interface is configured as a flange interface for connecting the transformer oil conservator breather.

[0008] Furthermore, the monitoring instrument is a vacuum meter.

[0009] Furthermore, the vacuum pumping equipment is a vacuum unit.

[0010] Furthermore, the five pipe interfaces are circumferentially distributed around the valve body.

[0011] Furthermore, all five of the pipe interfaces are standard flange interfaces.

[0012] Furthermore, a sealing gasket is provided at the pipe interface.

[0013] Furthermore, the third and fifth interfaces are detachably connected to end plates.

[0014] Furthermore, the internal flow channels of the valve body allow the five ports to be interconnected within the valve body.

[0015] Furthermore, both the first manual valve and the second manual valve are ball valves or gate valves.

[0016] By implementing this utility model, the following beneficial effects can be achieved: This utility model discloses a five-way valve for oil treatment of oil-immersed transformers. Through the integrated five-way valve body structure, it integrates multiple interfaces required for transformer oil treatment, such as vacuuming, injecting dry air, and pressure monitoring, into one unit. This enables rapid and reliable switching between different working modes, completely avoiding the problems of low efficiency and poor sealing caused by repeated disassembly and assembly of flanges in traditional operations, and significantly improving the efficiency and reliability of transformer operation and maintenance. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a five-way valve for oil handling in an oil-immersed transformer, according to one embodiment of the present invention. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "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," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] 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 a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between 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.

[0022] See Figure 1 One embodiment of this utility model discloses a five-way valve for oil treatment of oil-immersed transformers, including a valve body 1, on which five pipe interfaces are integrated, namely a first interface T1, a second interface T2, a third interface T3, a fourth interface T4 and a fifth interface T5.

[0023] The first interface T1 is the only port connecting the five-way valve to the transformer body and is the air circuit hub of the entire oil handling system. The first interface T1 is configured to connect to the transformer and to the breather flange of the transformer oil conservator via a pipeline. Preferably, the first interface T1 is configured as a flange interface for connecting to the transformer oil conservator breather.

[0024] The second interface T2 is connected to a first manual valve 2, which is configured to connect to a dry air source. The first manual valve 2 is used to control the on / off state of the dry air source. When dry air needs to be injected into the transformer (such as during oil drainage or pressure holding), this valve is opened; when performing a vacuum operation, this valve must be closed to prevent backflow of air. Preferably, the first manual valve 2 can be a ball valve or a gate valve.

[0025] The third interface T3 is configured to connect a monitoring instrument. Preferably, the monitoring instrument is a vacuum gauge. During the vacuuming process, the vacuum gauge can monitor and display the vacuum pressure inside the transformer body in real time, providing direct evidence for judging the vacuuming effect and whether the process requirements have been met.

[0026] The fourth interface T4 is connected to a second manual valve 3, which is configured to connect to the on-load tap changer oil chamber of the transformer. For transformers with an on-load tap changer, the on-load tap changer oil chamber also needs to be evacuated or filled with oil simultaneously. The second manual valve 3 is used to control the air path to the on-load tap changer oil chamber. If the transformer does not have an on-load tap changer, the second manual valve 3 can always be kept closed. Preferably, the second manual valve 3 can be a ball valve or a gate valve.

[0027] The fifth interface T5 is configured to connect to a vacuum pumping device. Preferably, the vacuum pumping device is a vacuum unit. The fifth interface T5 is a key interface for establishing a vacuum in the transformer, providing an evacuation channel for the vacuum unit.

[0028] Furthermore, in some embodiments, five pipe interfaces are distributed circumferentially around the valve body 1, all of which are standard flange interfaces, and sealing gaskets are provided at the pipe interfaces. That is, sealing gaskets are installed on the flange faces of the standard flange interfaces, and the sealing gaskets can be rubber gaskets or metal spiral wound gaskets to ensure the sealing of each connection point. A plug plate is detachably connected to the third interface T3 and the fifth interface T5. When the third interface T3 and the fifth interface T5 are not in use, the plug plate can be used to seal them to prevent leakage. The internal flow channels of the valve body 1 allow the five interfaces to communicate with each other inside the valve body 1.

[0029] This utility model discloses a five-way valve for oil treatment of oil-immersed transformers. Through the integrated structure of the five-way valve body 1, it integrates multiple interfaces required for transformer oil treatment, such as vacuuming, injecting dry air, and pressure monitoring, into one unit. This enables rapid and reliable switching between different working modes, completely avoiding the problems of low efficiency and poor sealing caused by repeated disassembly and assembly of flanges in traditional operations, and significantly improving the efficiency and reliability of transformer operation and maintenance.

[0030] The following is an application example of the five-way valve for oil handling in oil-immersed transformers according to this utility model: The steps for evacuating a transformer are as follows: 1. Connect the first interface T1 to the transformer oil conservator breather flange.

[0031] 2. Close the first manual valve 2 of the second interface T2 to cut off the dry air supply.

[0032] 3. Connect the third interface T3 to the vacuum meter.

[0033] 4. If the transformer has an on-load tap changer, connect the fourth port T4 to the on-load tap changer oil chamber and open the second manual valve 3 of the fourth port T4; if not, close the second manual valve 3.

[0034] 5. The fifth interface T5 is connected to the vacuum unit.

[0035] 6. Start the vacuum unit to simultaneously evacuate the transformer body and the oil chamber of the on-load tap changer, and monitor the vacuum level in real time through vacuum gauges.

[0036] The procedures for injecting dry air into a transformer (such as draining oil or maintaining pressure) are as follows: 1. Connect the first interface T1 to the transformer oil conservator breather flange.

[0037] 2. Open the first manual valve 2 of the second interface T2 to connect the dry air source.

[0038] 3. Reliably seal the third interface T3 and the fifth interface T5 with a blocking plate.

[0039] 4. Close the second manual valve 3 of the fourth port T4 (or block the fourth port T4).

[0040] 5. Adjust the pressure of the dry air source to inject dry air into the transformer.

[0041] By implementing this utility model, the following beneficial effects can be achieved: 1. Highly integrated, multi-functional valve: The multiple functional interfaces required for transformer oil treatment are integrated into one valve body 1, which has a compact structure and complete functions.

[0042] 2. Simple operation and quick switching: The core working modes such as "injecting dry air" and "vacuuming" can be switched by operating two manual valves. The operation steps are simplified from the traditional flange disassembly and assembly to valve opening and closing, which significantly improves efficiency.

[0043] 3. Reliable sealing and high safety: It avoids damage to the sealing surface caused by repeated disassembly and assembly. All interfaces adopt static sealing method of flange and gasket, and use plugs on idle interfaces to ensure the sealing reliability of the entire system under vacuum and positive pressure conditions, and effectively prevent the transformer from getting damp.

[0044] 4. Standardized layout and easy management: The standardized interfaces and fixed valve body structure make the on-site pipeline layout clear and standardized, reduce safety risks, and facilitate standardized management of equipment.

[0045] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A five-way valve for oil treatment in oil-immersed transformers, characterized in that, Includes a valve body (1), on which five pipe interfaces are integrated, namely the first interface (T1), the second interface (T2), the third interface (T3), the fourth interface (T4) and the fifth interface (T5); The first interface (T1) is configured for connecting a transformer; The second interface (T2) is connected to a first manual valve (2) and is configured to connect to a dry air source; The third interface (T3) is configured for connecting monitoring instruments; The fourth interface (T4) is connected to a second manual valve (3) and is configured to connect to the on-load tap changer oil chamber of the transformer. The fifth interface (T5) is configured for connecting a vacuum pumping device.

2. The five-way valve for oil treatment of oil-immersed transformers according to claim 1, characterized in that, The first interface (T1) is configured as a flange interface for connecting the transformer oil conservator breather.

3. The five-way valve for oil treatment of oil-immersed transformers according to claim 1, characterized in that, The monitoring instrument is a vacuum meter.

4. The five-way valve for oil treatment of oil-immersed transformers according to claim 1, characterized in that, The vacuum pumping equipment is a vacuum unit.

5. The five-way valve for oil treatment of oil-immersed transformers according to claim 1, characterized in that, The five pipe interfaces are distributed circumferentially around the valve body (1).

6. The five-way valve for oil treatment of oil-immersed transformers according to any one of claims 1 to 5, characterized in that, All five pipe interfaces are standard flange interfaces.

7. The five-way valve for oil treatment of oil-immersed transformers according to claim 6, characterized in that, A sealing gasket is provided at the pipe joint.

8. The five-way valve for oil treatment of oil-immersed transformers according to claim 1, characterized in that, The third interface (T3) and the fifth interface (T5) are detachably connected to end plates.

9. The five-way valve for oil treatment of oil-immersed transformers according to claim 1, characterized in that, The internal flow channels of the valve body (1) enable the five ports to be interconnected inside the valve body (1).

10. The five-way valve for oil treatment of oil-immersed transformers according to claim 1, characterized in that, Both the first manual valve (2) and the second manual valve (3) are ball valves or gate valves.

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