Exhaust device for oil tank of photovoltaic transformer

Abstract

The utility model belongs to the technical field of photovoltaic transformers, and particularly relates to an exhaust device for an oil tank of a photovoltaic transformer. Comprising an exhaust pipe, an exhaust opening and closing mechanism, an oil conservator, a controller and a gas relay. The exhaust pipe communicates with the oil tank; the oil conservator is communicated with the other end of the exhaust pipe; the controller is used for controlling start and stop of the transformer; the gas relay is electrically connected with the controller and matched with the oil tank, the exhaust opening and closing mechanism comprises a sliding block, a spring and a control pipe, the exhaust pipe comprises a first exhaust pipe and a second exhaust pipe, the first exhaust pipe, the second exhaust pipe and the control pipe are communicated with one another, the first exhaust pipe is communicated with the oil tank, and the second exhaust pipe is communicated with the oil conservator. The sliding block is slidably connected with the control pipe and matched with the second exhaust pipe, one end of the spring is fixedly connected with the control pipe, and the other end of the spring is fixedly connected with the sliding block. According to the scheme, the problems that a valve of an existing exhaust pipe is complex in structure and difficult to maintain are solved.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic transformer technology, and specifically relates to a photovoltaic transformer oil tank exhaust device. Background Technology

[0002] A photovoltaic (PV) power generation system mainly consists of the following key components, each with its specific function, working together to convert solar energy into usable electrical energy: Photovoltaic Panels: This is the core of the PV power generation system, composed of multiple photovoltaic cells. PV cells are typically made of semiconductor materials such as silicon, capable of directly converting the energy of sunlight into direct current (DC). Depending on different needs and levels of technological development, PV panels can have different efficiencies and power outputs. Inverter: Since the electricity generated by PV panels is DC, while most homes and the power grid use alternating current (AC), an inverter is needed to convert DC to AC. The inverter also provides system monitoring functions and protects the system from electrical faults. Transformer: Used to distribute and manage the power from the inverter, ensuring safe power supply to various loads. It may contain circuit breakers, fuses, and other protective devices to protect the system from electrical faults. Gas Relay: Also known as a gas relay, this component uses the hot oil and gas flow generated during a transformer fault to activate the relay. It is a protective element of the transformer; the gas relay is installed on the pipeline between the transformer's oil conservator (also known as the oil tank) and the oil tank.

[0003] Currently, an existing automatic venting device and transformer with announcement number CN214956328U are described. The device includes a gas relay, a vent pipe connected to the gas relay, and a manual vent valve and an automatic vent valve installed on the vent pipe. The gas relay is installed on the pipeline between the transformer's oil conservator and oil tank. The manual vent valve is located at the top of the gas relay, and the connection between the vent pipe and the automatic vent valve is vertical. The automatic vent valve is located at the top of the vent pipe. This utility model has a reasonable and compact structure and is easy to use. By opening the manual vent valve of the gas relay, a vent pipe is connected to the outlet of the manual vent valve, and an automatic vent valve is installed on the vent pipe. When gas is generated inside the transformer, it is vented through the automatic vent valve, ensuring the safe operation of the transformer without the need for manual venting operations, thus protecting the personal safety of substation personnel.

[0004] However, there is a problem: the exhaust pipe often needs to be manually opened to release exhaust gas, which is very troublesome. Electronic exhaust valves have a complex structure, are difficult to repair, and are more expensive. Utility Model Content

[0005] This solution provides a photovoltaic transformer oil tank venting device to solve the problem of complex valve structure and difficult maintenance of existing venting pipes.

[0006] This solution provides a photovoltaic transformer oil tank venting device, including:

[0007] Exhaust pipe: Used to discharge gas from the transformer's oil tank; the exhaust pipe is connected to the oil tank.

[0008] Oil storage tank: The oil storage tank is connected to the other end of the exhaust pipe;

[0009] Controller: The controller is used to control the start and stop of the transformer;

[0010] Gas relay: The gas relay is electrically connected to the controller and is used in conjunction with the oil tank;

[0011] Exhaust pipe opening and closing mechanism: used to open and close the exhaust pipe;

[0012] The exhaust opening and closing mechanism includes a sliding block, a spring, and a control pipe. The exhaust pipe includes a first exhaust pipe and a second exhaust pipe. The first exhaust pipe, the second exhaust pipe, and the control pipe are interconnected. The first exhaust pipe is connected to the oil tank, and the second exhaust pipe is connected to the oil storage tank. The sliding block is slidably connected to the control pipe and cooperates with the second exhaust pipe. One end of the spring is fixedly connected to the control pipe, and the other end is fixedly connected to the sliding block.

[0013] The principle of this scheme is as follows: the exhaust pipe is divided into a first exhaust pipe and a second exhaust pipe. The first exhaust pipe is directly connected to the transformer oil tank and is used to discharge the gas inside the tank; the second exhaust pipe is connected to the oil conservator and serves as a channel for gas storage or release. A control pipe is connected between the first and second exhaust pipes, forming a three-pipe interconnected system. A gas relay monitors changes in the amount or pressure of gas in the oil tank and transmits the information to the controller. The controller determines whether to adjust the transformer's operating status (such as start-up or shutdown) based on the data provided by the gas relay to ensure the safe operation of the system.

[0014] The spring provides a restoring force to the sliding block, allowing it to automatically close the second exhaust pipe and prevent gas flow when there is insufficient gas pressure. When the gas pressure inside the tank reaches a certain value, the gas pushes the sliding block against the spring's resistance, causing it to slide along the control pipe, opening the second exhaust pipe and allowing gas to enter the oil conservator.

[0015] The advantages of this solution are as follows: 1. The exhaust opening and closing mechanism, composed of a sliding block, spring, and control tube, enables automatic exhaust of gas from the oil tank without manual intervention, improving operational efficiency and safety. 2. The structure is relatively simple, easy to inspect and maintain, and reduces long-term operating costs. 3. This design allows for flexible adjustment of the exhaust process according to different situations, such as by changing the spring strength to adapt to different working conditions or requirements.

[0016] Furthermore, it also includes a magnet, which is fixedly connected to the first exhaust pipe. The sliding block is made of a ferromagnetic material, and the magnet cooperates with the sliding block. When the gas pressure reaches a certain threshold, the gas pushes the sliding block to overcome the spring resistance while also overcoming the attraction of the magnet to the sliding block. Once the gas pressure is sufficient to overcome the combined force of these two forces, the sliding block will quickly move to open the second exhaust pipe, achieving a rapid response. Similarly, after the gas is discharged, the spring will pull the sliding block back, and the attraction provided by the magnet can help the sliding block return to the closed position faster and more accurately, reducing lag.

[0017] Magnets can enhance the sealing performance of exhaust pipes and prevent gas leakage by attracting sliding blocks. Especially when the sliding block closes the second exhaust pipe, the magnetic attraction allows the sliding block to fit more tightly against the pipe wall, resulting in a better seal.

[0018] Furthermore, it also includes a contact switch, which is fixedly connected to the control tube and cooperates with the sliding block. The contact switch is electrically connected to the controller. When the air pressure reaches a set value, the sliding block will move, connecting the first and second exhaust pipes. If the air pressure continues to increase, the sliding block will continue to move and contact the release switch. At this time, the contact switch will send an electrical signal to stop the transformer, allowing personnel to perform maintenance and preventing further damage to the equipment.

[0019] Furthermore, it also includes a buzzer, which is fixedly connected to the transformer and electrically connected to the controller. When the sliding block moves and contacts the release switch, the contact switch sends an electrical signal, and the controller simultaneously activates the buzzer to notify personnel to come in for maintenance. Attached Figure Description

[0020] Figure 1 This is a structural diagram of a photovoltaic device consisting of a photovoltaic panel and a transformer.

[0021] Figure 2 This is a structural diagram of a photovoltaic transformer oil tank venting device.

[0022] Figure 3 This is an enlarged view of the exhaust opening and closing mechanism of a photovoltaic transformer oil tank exhaust device when it is closed.

[0023] Figure 4 This is an enlarged view of an alarm triggered by the exhaust opening and closing mechanism of a photovoltaic transformer oil tank exhaust device.

[0024] The reference numerals in the accompanying drawings include: 1. Photovoltaic panel; 2. Transformer; 3. Oil tank; 4. First exhaust pipe; 5. Second exhaust pipe; 6. Control pipe; 7. Sliding block; 8. Magnet; 9. Spring; 10. Contact switch. Detailed Implementation

[0025] As attached Figure 1 As shown:

[0026] A photovoltaic (PV) power generation system mainly consists of the following key components, each with its specific function, working together to convert solar energy into usable electrical energy: PV Panel 1: This is the core of the PV power generation system, composed of multiple photovoltaic cells. PV cells are typically made of semiconductor materials such as silicon, capable of directly converting the energy of sunlight into direct current (DC). Depending on different needs and levels of technological development, PV panels can have different efficiencies and power outputs. Inverter: Since the power generated by the PV panels is DC, while most homes and power grids use alternating current (AC), an inverter is needed to convert DC to AC. The inverter also provides system monitoring functions and protects the system from electrical faults. Transformer 2: In power plants or transmission lines, transformer 2 steps up the low voltage generated by the generator to a higher voltage (e.g., from several kilovolts to hundreds of thousands of volts) to facilitate long-distance power transmission and reduce line losses.

[0027] As attached Figure 2 As shown:

[0028] A photovoltaic transformer oil tank venting device is installed at the oil tank 3 of transformer 2, including an vent pipe, an oil conservator, a controller, a gas relay, and an venting opening and closing mechanism. The vent pipe is used to discharge the gas inside the oil tank 3 of transformer 2. The vent pipe is divided into a first vent pipe 4 and a second vent pipe 5. The first vent pipe 4 is directly connected to the oil tank 3 of transformer 2 to discharge the gas inside the oil tank 3; the second vent pipe 5 is connected to the oil conservator and serves as a gas storage or release channel. A control pipe 6 is connected between the first vent pipe 4 and the second vent pipe 5, forming a three-pipe interconnected system.

[0029] The oil conservator is connected to the other end of the vent pipe; the controller is used to control the start and stop of transformer 2. A gas relay is electrically connected to the controller and is located inside the oil tank 3. The gas relay monitors changes in the amount or pressure of gas in the oil tank 3 and transmits the information to the controller. Based on the data provided by the gas relay, the controller determines whether to adjust the operating state of transformer 2 (such as start and stop) to ensure the safe operation of the system.

[0030] As attached Figure 2 , Figure 3 As shown:

[0031] The function of spring 9 is to provide a restoring force for sliding block 7, so that when there is insufficient gas pressure, sliding block 7 can automatically close the second exhaust pipe 5 and prevent gas flow. When the gas pressure inside oil tank 3 reaches a certain value, the gas pushes sliding block 7 to overcome the resistance of spring 9, causing sliding block 7 to slide along control pipe 6, opening the second exhaust pipe 5, and allowing gas to enter the oil tank.

[0032] Magnet 8 is fixedly connected to the first exhaust pipe 4, and the sliding block 7 is made of ferromagnetic material, specifically iron. When the gas pressure reaches a certain threshold, the gas pushes the sliding block 7 to overcome the resistance of the spring 9, while also needing to overcome the attractive force of the magnet 8 on the sliding block 7. Once the gas pressure is sufficient to overcome the combined force of these two forces, the sliding block 7 will quickly move to open the second exhaust pipe 5, achieving a rapid response. Similarly, after the gas is discharged, the spring 9 will pull the sliding block 7 back, and the attractive force provided by the magnet 8 can help the sliding block 7 return to the closed position faster and more accurately, reducing lag.

[0033] Magnet 8 can enhance the sealing performance of the exhaust pipe by attracting sliding block 7, preventing gas leakage. Especially when sliding block 7 closes the second exhaust pipe 5, the attraction of magnet 8 can make sliding block 7 fit more tightly against the pipe wall, forming a better sealing effect.

[0034] Contact switch 10 is fixedly connected to control tube 6 and electrically connected to controller. When the air pressure reaches the set value, sliding block 7 will move, connecting the first exhaust pipe 4 and the second exhaust pipe 5. If the air pressure continues to increase, sliding block 7 will continue to move and contact the release switch. At this time, contact switch 10 will send an electrical signal to stop transformer 2, waiting for maintenance personnel to carry out maintenance, preventing the equipment from continuing to operate and causing damage.

[0035] The buzzer is fixedly connected to transformer 2 and electrically connected to the controller. When the sliding block 7 moves and contacts the release switch, the contact switch 10 will send an electrical signal, and the controller will simultaneously control the buzzer to start, notifying personnel to come in for maintenance.

[0036] As attached Figure 1-4 As shown:

[0037] The principle of this solution is that when there is not enough gas pressure in the oil tank 3, the sliding block 7 can automatically close the second exhaust pipe 5 under the action of the spring 9 and the magnet 8, thus preventing gas flow.

[0038] When the gas pressure inside the oil tank 3 reaches a certain value, the gas pushes the sliding block 7 to overcome the resistance of the spring 9 and the magnet 8, causing the sliding block 7 to slide along the control pipe 6, quickly opening the second exhaust pipe 5, allowing the gas to enter the oil tank.

[0039] If the air pressure continues to increase, the sliding block 7 will continue to move and contact the release switch. At this point, the contact switch 10 will send an electrical signal to stop the transformer 2, allowing personnel to perform maintenance and preventing further damage to the equipment. Simultaneously, the controller will activate the buzzer to notify personnel to come and perform maintenance.

[0040] The beneficial effects of this solution are as follows: 1. The exhaust opening and closing mechanism, composed of sliding block 7, spring 9, and control pipe 6, achieves automatic exhaust of gas in oil tank 3 without manual intervention, improving operational efficiency and safety. 2. The structure is relatively simple, easy to inspect and maintain, and reduces long-term operating costs. 3. This design allows for flexible adjustment of the exhaust process according to different situations, such as by changing the strength of spring 9 to adapt to different working conditions or requirements. 4. After gas exhaust is completed, spring 9 pulls back sliding block 7, and the attraction provided by magnet 8 helps sliding block 7 return to the closed position faster and more accurately, reducing lag. 5. Due to the presence of magnet 8, sliding block 7 will quickly move to open the second exhaust pipe 5, achieving rapid response. This prevents the problem of excessive internal gas pressure increase and damage to transformer 2 caused by slow valve opening.

[0041] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A photovoltaic transformer oil tank venting device, comprising: Exhaust pipe: used to exhaust gas from the oil tank (3) of the transformer (2), and the exhaust pipe is connected to the oil tank (3); Oil storage tank: The oil storage tank is connected to the other end of the exhaust pipe; Controller: The controller is used to control the start and stop of the transformer (2); Gas relay: The gas relay is electrically connected to the controller and is used in conjunction with the oil tank (3); Exhaust pipe opening and closing mechanism: used to open and close the exhaust pipe; Its features are, The exhaust opening and closing mechanism includes a sliding block (7), a spring (9), and a control pipe (6). The exhaust pipe includes a first exhaust pipe (4) and a second exhaust pipe (5). The first exhaust pipe (4), the second exhaust pipe (5), and the control pipe (6) are interconnected. The first exhaust pipe (4) is connected to the oil tank (3), and the second exhaust pipe (5) is connected to the oil storage tank. The sliding block (7) is slidably connected to the control pipe (6). The sliding block (7) cooperates with the second exhaust pipe (5). One end of the spring (9) is fixedly connected to the control pipe (6), and the other end is fixedly connected to the sliding block (7).

2. The photovoltaic transformer oil tank venting device according to claim 1, characterized in that, It also includes a magnet (8), which is fixedly connected to the first exhaust pipe (4), and the sliding block (7) is made of ferromagnetic material. The magnet (8) and the sliding block (7) cooperate with each other.

3. The photovoltaic transformer oil tank venting device according to claim 1, characterized in that, It also includes a contact switch (10), which is fixedly connected to the control tube (6) and cooperates with the sliding block (7). The contact switch (10) is electrically connected to the controller.

4. The photovoltaic transformer oil tank venting device according to claim 1, characterized in that, It also includes a buzzer, which is fixedly connected to the transformer (2) and electrically connected to the controller.

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