In-situ dehumidifying and drying device for low-voltage bushing of main transformer

Abstract

The utility model provides a main transformer low-voltage bushing in-situ dehumidifying and drying device, which comprises a multi-petal closed shell and a functional module, a thermal insulation layer is arranged on the inner wall of the multi-petal closed shell, the functional module comprises a controller and a detection module, the controller is connected with the detection module, and the detection module is connected with the multi-petal closed shell. The detection module can be assembled on the inner wall of the multi-petal type closed shell, and the multi-petal type closed shell is connected with the low-voltage sleeve through bolts. The device is simple in structure and practical in function, and can effectively, quickly and conveniently perform in-situ dehumidification and drying treatment on the low-voltage bushing of the main transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of main transformer low-voltage bushing maintenance, in particular to an in-situ dehumidification and drying device for a main transformer low-voltage bushing. Background Art

[0002] The main transformer is a key device in the power system, and its operating status directly affects the stability and safety of the power system. According to the maintenance guidelines, the main transformer should be overhauled every 10-15 years, and the main transformer overhaul will last for about 40 days of power outage maintenance. For outdoor or semi-outdoor main transformers, if there is long-term rain and high humidity environment during the power outage maintenance period, the low-voltage bushing of the main transformer may be damp, resulting in reduced insulation performance and even failure. Therefore, it is very necessary to dehumidify and dry the low-voltage bushing of the main transformer in situ.

[0003] At present, there are some dehumidification and drying equipment on the market, such as industrial hot air blowers, etc., but these equipment are finished products. When dehumidifying and drying the low-voltage bushing of the main transformer in situ, it is necessary to set up scaffolding, lift the industrial hot air blower to the scaffolding platform, and then cover the entire low-voltage bushing and the industrial hot air blower with fireproof cloth, and turn on the industrial hot air blower for dehumidification and drying. This treatment method is time-consuming and labor-intensive, and the dehumidification and drying efficiency is low.

[0004] Therefore, there is an urgent need for an in-situ dehumidification and drying device for the low-voltage bushing of a main transformer to solve the above problems. Summary of the invention

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide an in-situ dehumidification and drying device for a low-voltage bushing of a main transformer to solve the problems raised in the background technology.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme: an in-situ dehumidification and drying device for a main transformer low-voltage bushing, comprising a multi-petal closed shell and a functional module, the inner wall of the multi-petal closed shell is provided with a thermal insulation layer, the functional module comprises a controller and a detection module, the controller is connected to the detection module, the detection module can be assembled on the inner wall of the multi-petal closed shell, the multi-petal closed shell is connected to the low-voltage bushing by bolts, the multi-petal closed shell is divided into a first assembly module and a second assembly module, the edges of the splicing ends of the first assembly module and the second assembly module are provided with a sealing strip, the edge of the first assembly module is provided with a slide rail, the edge of the second assembly module is provided with a slide groove, the detection module comprises a heater, a temperature sensor and a humidity sensor, the detection modules can be removed from the inner wall of the multi-petal closed shell, the heater is arranged on the inner side wall of the first assembly module away from the vent, the temperature sensor is arranged on the inner top wall of the first assembly module, and the humidity sensor is arranged on the inner top wall of the second assembly module.

[0007] Preferably, a vent is provided on the top of the first assembly module, a solenoid valve is provided at the vent, and the solenoid valve is connected to a controller.

[0008] Preferably, the heater is a hot air drying heater.

[0009] The utility model has the following beneficial effects:

[0010] The utility model provides an in-situ dehumidification and drying device for a low-voltage bushing of a main transformer. The low-voltage bushing of the main transformer is sealed in-situ with a closed shell and a functional module, a temperature sensor and a humidity sensor are connected to a controller, a heater and a vent are controlled by the controller, so that the temperature is kept at a constant temperature of 60°C, the vent is closed when the humidity is below 30%, and the low-voltage bushing of the main transformer is dehumidified and dried in-situ. The processing method of the device has the characteristics of being effective, fast and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the first assembly module of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the second assembly module of the utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the controller of the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] See also Figures 1 to 4A main transformer low-voltage bushing in-situ dehumidification and drying device comprises a multi-petal closed shell 1 and a functional module, wherein the inner wall of the multi-petal closed shell 1 is provided with a thermal insulation layer 1.1, wherein the functional module comprises a controller 2.1 and a detection module, wherein the controller 2.1 is connected to the detection module, wherein the detection module can be assembled on the inner wall of the multi-petal closed shell 1, wherein the multi-petal closed shell 1 is connected to the low-voltage bushing by bolts 1.5, wherein the multi-petal closed shell 1 is divided into a first assembly module 1.2 and a second assembly module 1.3, wherein the edges of the splicing ends of the first assembly module 1.2 and the second assembly module 1.3 are provided with a sealing strip 1.4 The first assembly module 1.2 has a slide rail 1.2.3 on its edge, and the second assembly module 1.3 has a slide groove 1.3.1 on its edge. The detection module includes a heater 2.2.1, a temperature sensor 2.2.2, and a humidity sensor 2.2.3. The detection modules can be removed from the inner wall of the multi-petal closed shell 1. The heater 2.2.1 is arranged on the inner wall of the first assembly module 1.2 away from the vent 1.2.1. The temperature sensor 2.2.2 is arranged on the inner top wall of the first assembly module 1.2. The humidity sensor 2.2.3 is arranged on the inner top wall of the second assembly module 1.3. The device can effectively, quickly and conveniently perform in-situ dehumidification and drying treatment on the low-voltage bushing of the main transformer. The multi-petal design is more convenient for quickly closing the low-voltage bushing of the main transformer, and has heat preservation and protection functions. The heater is arranged inside the closed shell to heat the low-voltage bushing of the main transformer; the temperature sensor is arranged inside the closed shell to detect the internal temperature; the humidity sensor is arranged inside the closed shell to detect the internal humidity.

[0017] Preferably, a vent 1.2.1 is provided on the top of the first assembly module 1.2, and a solenoid valve 1.2.2 is provided at the vent 1.2.1, and the solenoid valve 1.2.2 is connected to the controller 2.1. The vent is provided on the top of the closed shell to discharge the water vapor generated during the dehumidification and drying process, and the solenoid valve is opened and closed by the controller to open and close the vent to control the humidity inside the device.

[0018] Preferably, the heater 2.2.1 is a hot air drying heater, which can achieve drying and dehumidification faster than other heaters.

[0019] The working principle of this embodiment is as follows:

[0020] In actual use, the utility model first assembles the detection module onto the inner wall of the multi-petal closed shell 1, splices the first assembly module 1.2 and the second assembly module 1.3 by means of slide grooves and slide rails, then uses the multi-petal closed shell 1 to seal the low-voltage bushing of the main transformer by bolting, and starts the heater 2.2.1 for heating by means of the controller 2.1; at the same time, the temperature sensor 2.2.2 and the humidity sensor 2.2.3 respectively detect the temperature and humidity inside the multi-petal closed shell 1; the controller 2.1 automatically adjusts the heating power of the heater 2.2.1 and the opening of the vent 1.2.1 according to the data detected by the temperature sensor 2.2.2 and the humidity sensor 2.2.3, so as to keep the temperature and humidity inside the multi-petal closed shell 1 constant; when the drying is completed, the controller 2.1 turns off the heater 2.2.1 and the vent 1.2.1, disassembles the multi-petal closed shell 1, and removes the detection module from the inner wall of the multi-petal closed shell 1.

[0021] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An in-situ dehumidification and drying device for a main transformer low-voltage bushing, comprising a multi-petal closed housing (1) and a functional module, characterized in that: The inner wall of the multi-petal closed shell (1) is provided with a thermal insulation layer (1.1); the functional module comprises a controller (2.1) and a detection module; the controller (2.1) is connected to the detection module; the detection module can be assembled on the inner wall of the multi-petal closed shell (1); the multi-petal closed shell (1) is connected to the low-voltage bushing via bolts (1.5); the multi-petal closed shell (1) is divided into a first assembly module (1.2) and a second assembly module (1.3); the edges of the splicing ends of the first assembly module (1.2) and the second assembly module (1.3) are provided with sealing strips (1.4); the edges of the first assembly module (1.2) are provided with slide rails ( 1.2.3), a slide groove (1.3.1) is provided on the edge of the second assembly module (1.3), the detection module comprises a heater (2.2.1), a temperature sensor (2.2.2) and a humidity sensor (2.2.3), and the detection modules can be removed from the inner wall of the multi-petal closed shell (1), the heater (2.2.1) is arranged on the inner side wall of the first assembly module (1.2) away from the ventilation port (1.2.1), the temperature sensor (2.2.2) is arranged on the inner top wall of the first assembly module (1.2), and the humidity sensor (2.2.3) is arranged on the inner top wall of the second assembly module (1.3).

2. The in-situ dehumidification and drying device for low-voltage bushing of main transformer according to claim 1 is characterized in that: A vent (1.2.1) is provided at the top of the first assembly module (1.2), a solenoid valve (1.2.2) is provided at the vent (1.2.1), and the solenoid valve (1.2.2) is connected to the controller (2.1).

3. The in-situ dehumidification and drying device for low-voltage bushing of main transformer according to claim 1 is characterized in that: The heater (2.2.1) is a hot air drying heater.

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