Cooling device for dry-type transformer

Abstract

The invention discloses a cooling device for a dry type transformer. The system comprises a fan system, a conveying pipeline, a blowing head, a temperature control system, an overflow valve and a fan power switch. The two fans on one side outside the dry-type transformer box body form a fan system which is connected with the air blowing head through an air supply conveying pipeline. A temperature controller of the temperature control system is installed on the left side of the transformer box body and connected with a temperature probe to detect the temperature. When the temperature of the winding reaches 100 DEG C, one fan is started, and the overflow valve controls the air not to flow outwards; and when the temperature reaches 120 DEG C, the other fan is started to increase the cooling air quantity. The device has the characteristics of simple structure, reasonable design, convenience in use, good effect, high efficiency, simplicity in operation, low cost and the like, can ensure the safe operation of the transformer, can replace the fan without stopping the transformer in case of failure, and ensures smooth production.

Description

Technical Field

[0001] The invention relates to the field of dry-type transformer cooling, and in particular to a cooling device for a dry-type transformer. Background Art

[0002] At present, the cooling system of dry-type transformers mainly adopts forced air cooling, among which the most effective method is the low-blowing top-extraction method. The cooling system of dry-type transformers realizes air flow and heat transfer through the action of fans. Specifically, the bottom-blowing method means that cold air is blown in from the bottom of the transformer, and absorbs the heat generated by the winding when passing through the surface of the winding to form hot air. The top-extraction method uses the upward suction force of the top fan to help the hot air rise. The low-blowing top-shaft method combines the upward blowing force from the bottom and the upward suction force from the top. The hot air moves upward with the help of the buoyancy force, thereby effectively taking away the heat generated by the winding. This cooling method not only improves the cooling efficiency, but also helps to control the operating temperature of the transformer and ensure its safe and stable operation.

[0003] However, the cooling fans at the bottom of dry-type transformers are now installed at the bottom of the transformer. Due to the space limitations at the bottom of the transformer, the size of the fan installation and the air volume are limited, which has a poor cooling effect on the transformer. In addition, the bottom fan is often damaged during operation. Each time the fan is damaged and replaced, the transformer must be stopped for replacement, which seriously affects production and safety. In order to replace the transformer cooling fan without power outage, it is necessary to improve the cooling method of the dry-type transformer. Summary of the invention

[0004] Based on the above technical problems that the cooling fan at the bottom of the dry-type transformer has a poor cooling effect on the transformer and the transformer needs to be stopped before the fan can be replaced, a cooling device for a dry-type transformer is provided. The present invention mainly installs two fans on one side of the dry-type transformer box body, and sends wind to the bottom of the transformer winding through a pipeline. When the transformer is heated due to overload winding, the temperature control system controls the two fans to be powered on, and the bottom winding of the dry-type transformer starts to be blown through the delivery pipeline to dissipate heat, and the wind is blown from the bottom of the transformer to the upper part, so that the transformer is quickly cooled, and the transformer is prevented from burning due to excessive temperature. When the cooling fan is damaged, it can be replaced without stopping the transformer, which can not affect production and ensure the normal operation of the dry-type transformer.

[0005] The technical means adopted by the present invention are as follows:

[0006] A cooling device for a dry-type transformer, comprising: a fan system, a conveying pipeline, a blower head, a temperature control system, a relief valve, and a fan power switch;

[0007] Two fans are installed on one side of the dry-type transformer box to form a fan system, with an air supply pipeline connected in the middle, and the air supply pipeline is connected to the air blowing head;

[0008] When the temperature of the dry-type transformer winding reaches 100 degrees, the temperature control system detects the transformer winding temperature signal and transmits it to the fan control system. The fan control system transmits it to the fan system to start one of the fans. The overflow valve can control the air volume to flow out through the pipeline of another fan when one fan is turned on.

[0009] When the temperature of the dry-type transformer winding reaches 120 degrees, the temperature control system detects the transformer winding temperature signal and transmits it to the fan control system. The fan control system transmits it to another fan in the fan system to start, increase the cooling air volume of the transformer, and achieve rapid cooling.

[0010] Furthermore, the temperature control system is a temperature controller, which is installed on the left side of the transformer box and is connected to a temperature probe via a cable to detect the temperature of the transformer.

[0011] Furthermore, the fan system is composed of two fans, which mainly control the cooling air volume and are connected to the temperature controller via cables.

[0012] Furthermore, the air supply and delivery duct is a duct for delivering air volume.

[0013] Furthermore, the blower head is installed at the bottom of the dry-type transformer winding to cool the dry-type transformer, and the air outlet of the blower conveying duct is connected to the air supply conveying duct.

[0014] Furthermore, the overflow valve is installed between the pipelines of the two fans to prevent the air volume from flowing out through the pipeline of the other fan when one fan is turned on.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention provides a cooling device for a dry-type transformer, which has a simple structure and clear and reasonable connections between various components. The fan system consists of two fans and related components, with a compact layout. The installation method on the outside of the dry-type transformer box does not take up too much space, and the design of the conveying pipeline, the blowing head, the overflow valve and other components are based on the principle of simplicity and efficiency, so that the overall device is optimized in terms of space utilization and layout.

[0017] 2. The cooling device for a dry-type transformer provided by the present invention has a reasonable design to ensure the ease of operation. The temperature control system can automatically detect the temperature of the transformer winding and intelligently control the start-up of the fan according to different temperature values ​​without excessive manual intervention. When the temperature reaches the set value, the fan system can respond quickly and start the corresponding fan in time for cooling. It is convenient and efficient to use.

[0018] 3. The present invention provides a cooling device for a dry-type transformer. The device has good effect and high efficiency. When the transformer winding temperature reaches 100 degrees, a fan is started to cool the transformer through the air supply pipeline and the blower head. The overflow valve effectively controls the outflow of air to ensure the accuracy of the cooling effect; when the temperature rises to 120 degrees, another fan is started to further increase the cooling air volume and achieve rapid cooling, ensuring that the dry-type transformer can be effectively cooled under different temperature conditions, greatly improving the cooling efficiency.

[0019] 4. The present invention provides a cooling device for a dry-type transformer. The device has the advantage of low cost, simple structure, and relatively low material and manufacturing costs. At the same time, the device has low investment and can save a lot of capital investment for the enterprise. The equipment runs stably, reducing the maintenance cost and downtime loss caused by equipment failure.

[0020] 5. The present invention provides a cooling device for a dry-type transformer, which can ensure the safe operation of the dry-type transformer. Through timely and effective cooling, the transformer can be prevented from malfunctioning due to excessive temperature, thereby extending the service life of the transformer and reducing safety risks. In addition, when the transformer fails, the design of the device cleverly solves the problem of replacing the fan without stopping the transformer. Through a reasonable fan system layout and the setting of the overflow valve, the air volume can be effectively controlled when replacing the fan to avoid affecting the operation of the transformer, thereby ensuring smooth production and greatly improving production efficiency and equipment reliability.

[0021] Based on the above reasons, the present invention can be widely promoted in the field of dry-type transformer cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A top view of a cooling device for a dry-type transformer according to an embodiment of the present invention;

[0024] Figure 2 The figure is a side view of a cooling device for a dry-type transformer in an embodiment of the present invention.

[0025] In the figure: 1. Transformer; 2. Air outlet of fan delivery duct; 3. Fan I; 4. Overflow valve; 5. Fan II; 6. Fan delivery duct; 7. Fan power switch; 8. Transformer winding; 9. Temperature controller. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0033] like Figure 1 and Figure 2 As shown, the present invention provides a cooling device for a dry-type transformer, comprising: a fan system, a delivery pipeline, a blower head, a temperature control system, a relief valve 4, and a fan power switch 7;

[0034] Two fans are installed on one side of the dry-type transformer 1 box to form a fan system, with an air supply pipeline connected in the middle, and the air supply pipeline is connected to the air blowing head;

[0035] When the temperature of the dry-type transformer winding 8 reaches 100 degrees, the temperature control system detects the temperature of the transformer winding 8 and transmits the temperature signal to the fan control system, and the fan control system transmits the temperature signal to the fan system to start one of the fans. The overflow valve 4 can control the air volume to flow out through the pipeline of another fan when one fan is turned on;

[0036] When the temperature of the dry-type transformer winding 8 reaches 120 degrees, the temperature control system detects the temperature of the transformer winding 8 and transmits the temperature signal to the fan control system. The fan control system transmits the temperature signal to another fan in the fan system to start, increase the cooling air volume of the transformer 1, and achieve rapid cooling.

[0037] Furthermore, when the transformer 1 generates heat due to overload winding, two cooling fans of the dry-type transformer 1 are started through the temperature control system, and the bottom of the winding of the dry-type transformer 1 is blown to dissipate heat through the conveying pipeline. When the fan fails, it is only necessary to shut down the power supply of the fan I3 or the fan II5 for replacement without stopping the transformer 1.

[0038] Furthermore, the outlets of the fan conveying duct air outlet 2 are arranged in double rows, and the two rows of eyes are 30 degrees apart, so that air blowing and heat exchange at different angles can be performed, and the heat dissipation effect is better.

[0039] Furthermore, the temperature control system is a temperature controller 9 , which is installed on the left side of the transformer 1 box and is connected to a temperature probe via a cable to detect the temperature of the transformer 1 .

[0040] Furthermore, the fan system is composed of two fans, which are mainly used to control the cooling air volume and are connected to the temperature controller 9 via cables.

[0041] Furthermore, the air supply and delivery duct is a duct for delivering air volume.

[0042] Furthermore, the blower head is installed at the bottom of the dry-type transformer winding 8 to cool the dry-type transformer 1, and its fan conveying duct air outlet 2 is connected to the air supply conveying duct.

[0043] Furthermore, the overflow valve 4 is installed between the pipelines of the two fans to prevent the air volume from flowing out through the pipeline of the other fan when one fan is turned on.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cooling device for a dry-type transformer, characterized in that: include: Fan system, delivery pipeline, air blowing head, temperature control system, overflow valve, fan power switch; Two fans are installed on one side of the dry-type transformer box to form a fan system, with an air supply pipeline connected in the middle, and the air supply pipeline is connected to the air blowing head; When the temperature of the dry-type transformer winding reaches 100 degrees, the temperature control system detects the transformer winding temperature signal and transmits it to the fan control system. The fan control system transmits it to the fan system to start one of the fans. The overflow valve can control the air volume to flow out through the pipeline of another fan when one fan is turned on. When the temperature of the dry-type transformer winding reaches 120 degrees, the temperature control system detects the transformer winding temperature signal and transmits it to the fan control system. The fan control system transmits it to another fan in the fan system to start, increase the cooling air volume of the transformer, and achieve rapid cooling.

2. A cooling device for a dry-type transformer according to claim 1, characterized in that: The temperature control system is a temperature controller, which is installed on the left side of the transformer box and is connected to a temperature probe through a cable to detect the temperature of the transformer.

3. A cooling device for a dry-type transformer according to claim 1, characterized in that: The fan system consists of two fans, which mainly control the cooling air volume and are connected to the temperature controller through cables.

4. A cooling device for a dry-type transformer according to claim 1, characterized in that: The air supply and delivery duct is a duct used for delivering air volume.

5. The cooling device for a dry-type transformer according to claim 1, characterized in that: The air blowing head is installed at the bottom of the dry-type transformer winding to cool the dry-type transformer, and the air outlet of the fan conveying pipeline is connected to the air supply conveying pipeline.

6. A cooling device for a dry-type transformer according to claim 1, characterized in that: The overflow valve is installed between the two fan pipes to prevent the air volume from flowing out through the pipe of another fan when one fan is turned on.

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