Dry gas double-channel generating device for high-altitude transformer

Abstract

The utility model discloses a high-altitude transformer dry gas double-channel generating device which comprises a gas injection manifold, a collecting pipe, flow dividing pipes and gas supply units, the two gas supply units are arranged in parallel and connected with the gas inlet ends of the two flow dividing pipes respectively, and the gas outlet ends of the two flow dividing pipes are connected to the collecting pipe; the gas injection manifold comprises two gas injection branch pipes and a gas injection main pipe, and one end of the gas injection main pipe serves as a gas outlet and is used for injecting gas into the converter transformer; the gas outlet ends of the two gas injection branch pipes are connected with the other end of the gas injection main pipe, and the gas inlet ends of the two gas injection branch pipes are connected with the collecting pipe; and the two gas injection branch pipes are respectively provided with a shunt control valve. According to the utility model, two channels are adopted and matched with the design of the shunting control valve, the shunting control valve controls the flow and the pressure, so that the dry gas is ensured to enter the converter transformer at stable pressure and dew point, and the influence on the installation of the transformer when equipment fails can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of converter station installation technology in the power industry, specifically to a dual-channel generator for drying gas in high-altitude transformers. Background Technology

[0002] The process of injecting dry air into converter transformers requires injecting qualified air into the converter transformer through a dry air generator. With the widespread application of ultra-high voltage direct current transmission, converter transformers, as core equipment, need to withstand higher voltages and currents. The quality of the injected dry air directly affects the insulation performance of bushings and windings, threatening the safety of the power grid.

[0003] The converter-type variable injection air drying process generally includes:

[0004] Internal inspection phase: When the converter body is exposed to air (such as bushing installation, winding inspection), dry air is injected through a dedicated pipeline to maintain a slight positive pressure inside (approximately 0.01~0.03MPa) to prevent moisture intrusion.

[0005] Vacuum breaking and static release stage: After the vacuum oil injection or drying process is completed, the vacuum needs to be slowly released with dry air to avoid air directly entering and causing the insulation to become damp (if the vapor phase is dried, dry air is used to break the vacuum according to the process requirements).

[0006] Sealing test stage: Before oil filling or after maintenance, fill the oil tank and accessories with dry air to 0.03MPa, maintain the pressure for 24 hours and check the sealing performance (such as filling the breather valve of the oil tank with air).

[0007] It is evident that injecting dry air during the converter transformer installation process is a critical step, directly affecting the equipment's insulation performance and operational reliability.

[0008] Currently, the process of injecting dry air into converter transformers mainly involves direct injection through an air generator. However, in high-altitude areas, the mechanical failure rate of the equipment is high, and the pressure and dew point of the dry air often fail to meet the requirements, which affects the installation of the transformer. Utility Model Content

[0009] To address the problems in the prior art, this invention provides a dual-channel generator for drying gas in high-altitude transformers.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] A dual-channel generator for drying gas in high-altitude transformers includes an injection manifold, a junction pipe, a branch pipe, and a gas supply unit.

[0012] Two gas supply units are arranged side by side. The two gas supply units are connected to the inlet end of two branch pipes respectively, and the outlet end of the two branch pipes is connected to the manifold.

[0013] The gas injection manifold includes two gas injection branch pipes and one gas injection main pipe. One end of the gas injection main pipe serves as the gas outlet for injecting gas into the converter transformer. The gas outlets of the two gas injection branch pipes are connected to the other end of the gas injection main pipe, and the gas inlets of the two gas injection branch pipes are connected to the manifold. Each of the two gas injection branch pipes is equipped with a flow control valve.

[0014] Preferably, each of the two air injection branch pipes is equipped with a pressure pump.

[0015] Preferably, the manifold is equipped with a flow monitoring device.

[0016] Preferably, the manifold is closed at both ends, and three interfaces are provided at intervals along the length of the manifold. One interface near the gas tank is used to connect to the gas outlet of the two branch pipes, and the other two interfaces are respectively connected to the gas inlet of the two gas injection branch pipes.

[0017] Preferably, the gas supply unit is a gas cylinder.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model adopts a dual-channel design with a diversion control valve. The diversion control valve controls the flow rate and pressure to ensure that the dry gas enters the converter at a stable pressure and dew point.

[0020] When a gas tank or pressure pump on one side fails, the diversion control valve compensates for the pressure loss on the other side by precisely controlling the pressure and flow control valve, ensuring the stability of the pressure and dew point of the dry gas, thereby reducing the impact of equipment failure on transformer installation.

[0021] 2. This utility model also includes a flow monitoring instrument for data analysis and status monitoring. When the dry air does not meet the requirements, the flow monitoring instrument performs data analysis and status monitoring, uploads the data to the server and records it, and issues an alarm. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the present invention;

[0023] Figure 2 This is a top view of the present invention.

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] like Figures 1 to 2 As shown, this embodiment provides a dual-channel generator for drying gas in high-altitude transformers, including an injection manifold 1, a diversion control valve 2, a pressure pump 3, a flow monitor 4, a gas tank 5, a diversion pipe 6, and a manifold 7.

[0027] Two gas cylinders 5 are arranged side by side. The gas cylinders 5 are respectively connected to the inlet end of the two branch pipes 6, and the outlet end of the two branch pipes 6 is connected to the manifold 7.

[0028] The gas injection manifold 1 includes two gas injection branch pipes 11 and one gas injection main pipe 12. One end of the gas injection main pipe 12 serves as an outlet for injecting gas into the converter transformer. The outlet ends of the two gas injection branch pipes 11 are connected to the other end of the gas injection main pipe 12, and the inlet ends of the two gas injection branch pipes 11 are connected to the manifold 7.

[0029] In this embodiment, the manifold 7 is closed at both ends. The manifold 7 has three ports spaced apart along its length. One port near the gas tank is used to connect to the outlet of the two branch pipes 6, and the other two ports are connected to the inlet of the two injection branch pipes 11 respectively.

[0030] Each of the two gas injection branch pipes 11 is equipped with a flow control valve 2, and each of the two gas injection branch pipes 11 is also equipped with a pressure pump 3. A flow monitor is installed on the manifold 7.

[0031] The working principle of this utility model is as follows:

[0032] During operation, by activating the device, the drying gas is pressurized by the gas tank 5 and pressure pump 3, and then enters the converter transformer 8 through the diversion control valve 2 and the gas injection manifold 1. The diversion control valve 2 controls the flow rate and pressure, ensuring that the drying gas enters the converter transformer at a stable pressure and dew point. The flow monitor 4 performs data analysis and status monitoring.

[0033] When one side of the gas tank 5 or pressure pump 3 malfunctions, the diversion control valve 2 compensates for the pressure loss on the other side by precisely controlling the pressure, ensuring stable pressure and dew point of the dry gas. When the dry air does not meet the requirements, the flow monitor 4 performs data analysis and status monitoring, uploads the data to the server, records it, and issues an alarm.

[0034] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0035] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0037] 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 an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

Claims

1. A dual-channel generator for drying gas in high-altitude transformers, characterized in that, Includes the gas injection manifold, junction box, branch line, and gas supply unit: Two gas supply units are arranged side by side. The two gas supply units are connected to the inlet end of two branch pipes respectively, and the outlet end of the two branch pipes is connected to the manifold. The gas injection manifold includes two gas injection branch pipes and one gas injection main pipe. One end of the gas injection main pipe serves as the gas outlet for injecting gas into the converter transformer. The gas outlets of the two gas injection branch pipes are connected to the other end of the gas injection main pipe, and the gas inlets of the two gas injection branch pipes are connected to the manifold. Each of the two gas injection branch pipes is equipped with a flow control valve.

2. The dual-channel generator for drying gas in high-altitude transformers according to claim 1, characterized in that, Pressure pumps are installed on the two air injection branches.

3. The dual-channel generator for drying gas in high-altitude transformers according to claim 2, characterized in that, The manifold is equipped with a flow monitoring device.

4. The dual-channel generator for drying gas in high-altitude transformers according to claim 1, characterized in that, The manifold is closed at both ends, and three ports are arranged at intervals along the length of the manifold. One port near the gas tank is used to connect to the gas outlet of the two branch pipes, and the other two ports are connected to the gas inlet of the two gas injection branch pipes respectively.

5. The dual-channel generator for drying gas in high-altitude transformers according to claim 1, characterized in that, The gas supply unit is a gas cylinder.

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