An indoor exhaust system for PTA dry-type transformers
By designing an exhaust system inside the PTA dry-type transformer, and using fans and guide tubes to form directional airflow, the problem of low heat dissipation efficiency of the transformer is solved, thus achieving safe and stable operation of the transformer and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YISHENG DAHUA PETROCHEM
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-26
AI Technical Summary
Existing technologies struggle to effectively control the temperature inside PTA dry-type transformer chambers, resulting in low heat dissipation efficiency and impacting equipment lifespan and production safety.
Design an indoor ventilation device for PTA dry-type transformers, including an exhaust device and an exhaust device. The device uses a fan, a guide tube, and an exhaust hood to form a directional airflow, and exhausts heat to the outside through the exhaust pipe. It is also equipped with an insect screen and a rainproof elbow to ensure the normal operation of the device.
This achieves efficient heat dissipation from the transformer, reduces temperature rise, extends equipment life, lowers the failure rate, and ensures safe transformer operation.
Smart Images
Figure CN224287936U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical ventilation technology, specifically relating to an indoor exhaust device for a PTA dry-type transformer. Background Technology
[0002] The high-voltage power distribution room in the PTA (purified terephthalic acid) unit is a crucial facility in chemical production, with a total area of 1215 square meters and a ceiling height of 3.4 meters. To maintain a suitable temperature within the power distribution room, the original design incorporated two air conditioning units operating in parallel, with a total cooling capacity of 253 kW. A separate transformer room, measuring 81 square meters, is also located within the high-voltage power distribution room, primarily housing the four dry-type transformers required for the oxidation reactor's agitator.
[0003] These four dry-type transformers, model ZTSFG(H)-1900 / 10, have a no-load loss of 5.7kW and a short-circuit loss of 34.5kW, and are cooled using the AF cooling method. Due to the large and concentrated total heat dissipation of these four transformers, the two existing air conditioners in the high-voltage distribution room are insufficient to meet the temperature control requirements during transformer operation in summer, especially failing to guarantee that the operating ambient temperature does not exceed 40℃.
[0004] When the operating temperature of a transformer exceeds the safe range, a series of serious consequences will occur. First, excessively high temperatures will affect the normal service life of the transformer, and in extreme cases, may even burn it out, leading to equipment damage and production interruption. Second, high transformer temperatures may also trigger interlocking protection mechanisms, causing the oxidation reactor to shut down, which will not only directly affect production efficiency but also cause significant economic losses.
[0005] To address the aforementioned issues, it is necessary to improve existing technologies to better control the ambient temperature of transformer rooms, ensuring the safe and stable operation of transformers and avoiding resulting economic losses. Currently, although air conditioning systems provide cooling for distribution rooms, their cooling effect is still insufficient when faced with the concentrated heat dissipation from transformers. Therefore, it is necessary to explore new technological solutions to improve the heat dissipation efficiency of transformer rooms.
[0006] Patent CN206497806U discloses a cooling and ventilation device for dry-type transformers, aiming to provide the cooling capacity required for dry-type transformers and solve the problem of water ingress into the ventilation ducts. Although the patent constructs a basic ventilation system, it does not include a flow guiding structure, nor does it propose a solution to the problem of airflow turbulence during operation, which causes hot air to stagnate inside the equipment. This results in the inability to quickly expel hot air, affecting the cooling efficiency. Utility Model Content
[0007] To overcome the shortcomings of existing technologies, this invention proposes an indoor exhaust system for PTA dry-type transformers. This invention directly exhausts the heat emitted by the transformer to the outside by installing a fan on the exhaust duct, ensuring the safe operation of the transformer, maintaining the normal service life of the device, and reducing the equipment failure rate.
[0008] The technical solution adopted by this utility model to solve its technical problem is:
[0009] A PTA dry-type transformer indoor ventilation device includes an exhaust device and an exhaust device. The exhaust device includes an exhaust duct and an insect-proof screen at the port. The exhaust device includes a fan, a fireproof flexible connection, an airflow regulating valve, a guide tube, and a dry-type transformer. The guide tube is connected above the dry-type transformer. An exhaust hood is correspondingly installed above the top outlet of the guide tube. The rear end of the exhaust hood is connected to the airflow regulating valve. The rear end of the airflow regulating valve is connected to the fireproof flexible connection. The rear end of the fireproof flexible connection is connected to the inlet end of the exhaust duct. The outlet end of the exhaust duct extends from the indoor space through the wall to the outdoors. The fan is installed inside the exhaust duct located indoors, and the insect-proof screen is installed at the outlet of the exhaust duct.
[0010] Furthermore, the outlet section of the exhaust pipe is curved, and this curved part is a rainproof elbow.
[0011] Furthermore, multiple guide tubes are provided above the dry-type transformer.
[0012] Furthermore, the exhaust hood is a hollow quadrangular truncated structure, and the area of the port connected to the air volume regulating valve is smaller than the area of its bottom opening, with its bottom opening positioned above multiple guide tubes.
[0013] The beneficial effects of this utility model are as follows:
[0014] (1) This application uses a fan and forms a directional airflow with the guide tube and exhaust hood to accelerate the discharge of hot air, reduce the temperature rise of the transformer, and extend its service life.
[0015] (2) This application is equipped with an insect-proof net and a rainproof elbow. The insect-proof net prevents insects from clogging the pipe, and the rainproof elbow is used to prevent rainwater from flowing back in and to ensure the normal operation of the ventilation device.
[0016] In summary, this application can stably and efficiently dissipate the heat emitted by the transformer to the outside, ensuring the safe operation of the transformer, maintaining the normal service life of the device, and reducing the failure rate of the equipment. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] Figure 2 This is the front view of the dry-type transformer of this utility model.
[0019] Figure 3 This is a side view of the dry-type transformer of this utility model.
[0020] The diagram shows: 1. Exhaust duct, 2. Rainproof elbow, 3. Insect screen at the port, 4. Exhaust hood, 5. Fan, 6. Fireproof flexible connection, 7. Air volume regulating valve, 8. Flow guide tube, and 9. Dry-type transformer. Detailed Implementation
[0021] To more clearly illustrate the purpose, technical solutions, and advantages of this disclosure, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the following description of the embodiments is intended to explain and illustrate the overall concept of this disclosure and should not be construed as limiting the disclosure. In the specification and drawings, the same or similar reference numerals refer to the same or similar parts or components. For clarity, the drawings are not necessarily drawn to scale, and some well-known parts and structures may be omitted from the drawings.
[0022] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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 disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this disclosure, it should be noted that, unless otherwise expressly 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.
[0024] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0026]
Example 1
[0027] like Figure 1 and Figure 2As shown, an indoor ventilation device for a PTA dry-type transformer includes an exhaust device and an exhaust device. The exhaust device includes an exhaust pipe 1 and an insect-proof screen 3 at the port. The exhaust device includes a fan 5, a fireproof flexible connection 6, an air volume regulating valve 7, a guide tube 8, and a dry-type transformer 9.
[0028] Multiple guide tubes 8 are connected above the dry-type transformer 9. An exhaust hood 4 is correspondingly installed above the outlet of each guide tube 8. The exhaust hood 4 is connected to a flow rate regulating valve 7 at its rear end for precise airflow control. A fireproof flexible connector 6 is connected to the rear end of the flow rate regulating valve 7 to prevent fire. The fireproof flexible connector 6 is connected to the inlet end of the exhaust duct 1. The outlet end of the exhaust duct 1 extends from the interior through the wall to the exterior, and its outlet section is curved, forming a rainproof elbow 2 to prevent rainwater backflow. A fan 5 is installed inside the exhaust duct 1 located indoors. An insect screen 3 is installed at the outlet of the exhaust duct 1 to prevent insects, fluff, and other foreign objects from entering the interior space through the exhaust system. Furthermore, the exhaust hood 4 is a hollow, four-sided truncated pyramid structure. The area of the port connected to the flow rate regulating valve 7 is smaller than the area of its bottom opening, and its bottom opening covers the multiple guide tubes 8.
[0029]
Example 2
[0030] The rest of this embodiment is the same as that of embodiment 1. The working process of this utility model is described in detail below:
[0031] After the dry-type transformer 9 generates heat during operation, the high-temperature hot air it produces rises naturally due to its reduced density. The guide cylinder 8 installed on the top of the transformer forms a vertical airflow channel, which constrains the disorderly diffused hot air into a directional upward airflow.
[0032] The conical exhaust hood 4 located above the guide tube 8 establishes a negative pressure zone through its gradually expanding structure. This negative pressure accelerates the hot air at the outlet of the guide tube 8 through the transition section, increasing the flow velocity while avoiding turbulence losses caused by airflow separation.
[0033] The axial flow fan 5, configured in the exhaust duct 1, operates according to a preset temperature control strategy:
[0034] For example: when the indoor temperature is ≥30℃, the thermostat triggers fan 5 to operate normally;
[0035] Switch to high-speed mode when the temperature is ≥35℃;
[0036] Automatic shutdown when temperature ≤30℃;
[0037] When the fan is running, it can generate 12-15 air changes per hour, and the exhaust efficiency is 3-4 times higher than that of natural ventilation.
[0038] Preferably, the system can monitor parameters such as transformer winding temperature, indoor ambient temperature, and fan 5 current in real time through an integrated PLC control system. When excessive winding temperature or system malfunction is detected, the fan 5 will be automatically started and an audible and visual alarm will be triggered. An emergency power supply can also be provided to the system, maintaining ventilation capacity for at least 30 minutes in the event of a mains power outage.
[0039] According to actual tests, under the conditions of an indoor temperature of 38℃ and a transformer load rate of 95%, the exhaust device of this application can stably control the temperature of the transformer room at (30±1)℃, and the overall energy efficiency is significantly better than that of traditional air conditioning cooling solutions.
[0040] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model.
Claims
1. An indoor exhaust ventilation device for a PTA dry-type transformer, characterized in that, The device includes an exhaust system and an exhaust system. The exhaust system includes an exhaust pipe (1) and an insect screen (3) at the port. The exhaust system includes a fan (5), a fireproof flexible connection (6), an air volume regulating valve (7), a guide tube (8), and a dry transformer (9). The guide tube (8) is connected above the dry transformer (9). An exhaust hood (4) is provided above the top outlet of the guide tube (8). The air volume regulating valve (7) is connected to the rear end of the exhaust hood (4). The fireproof flexible connection (6) is connected to the rear end of the air volume regulating valve (7). The fireproof flexible connection (6) is connected to the inlet end of the exhaust pipe (1). The outlet end of the exhaust pipe (1) extends from the indoor space through the wall to the outdoor space. The fan (5) is installed inside the exhaust pipe (1) located indoors. The insect screen (3) at the port is installed at the outlet of the exhaust pipe (1).
2. The indoor exhaust device for a PTA dry-type transformer according to claim 1, characterized in that, The outlet section of the exhaust pipe (1) is curved, and the curved part is a rainproof elbow (2).
3. The indoor exhaust device for a PTA dry-type transformer according to claim 1, characterized in that, Multiple guide tubes (8) are provided above the dry-type transformer (9).
4. The indoor exhaust device for a PTA dry-type transformer according to claim 1, characterized in that, The exhaust hood (4) is a hollow quadrangular truncated structure. The area of the port connected to the air volume regulating valve (7) is smaller than the area of its bottom opening. Its bottom opening is located above multiple guide tubes (8).