A pressure relief device for an oil-immersed transformer

Abstract

This utility model relates to the field of oil-immersed transformer technology and discloses a pressure relief device for an oil-immersed transformer, including an oil-immersed transformer housing. A mounting frame is fixedly connected to the bottom of the oil-immersed transformer housing. A drain pipe is fixedly connected to the left side of the oil-immersed transformer housing. An insulating terminal is fixedly connected to the top of the oil-immersed transformer housing. A radiator is fixedly connected to the right side of the oil-immersed transformer housing. A mounting flange is fixedly connected to the top of the oil-immersed transformer housing. A pressure relief mechanism is installed on the top of the mounting flange. An auxiliary exhaust mechanism is installed on the top of the oil-immersed transformer housing. During use, the position of the mounting plate can be easily adjusted by the movement of the sliding plate, and the position of the movable plate can be easily adjusted by rotating the threaded rod. The gas-liquid mixture is introduced into the gas-liquid separator through the air inlet pipe, facilitating the separation of the gas-liquid mixture.

Description

Technical Field

[0001] This utility model relates to the field of oil-immersed transformer technology, specifically a pressure relief device for an oil-immersed transformer. Background Technology

[0002] Oil-immersed transformers are a widely used type of power transformer. They utilize insulating oil to cool and insulate the internal components. This type of transformer is used to increase or decrease voltage to meet the power demands of different applications. When the internal pressure of the transformer exceeds the design-allowed safety threshold, if it is not released in time, it may cause deformation of the transformer tank, cracking of welds, or even explosion, resulting in serious equipment damage and safety accidents.

[0003] When existing pressure relief devices release pressure on transformers, the oil inside the transformer sprays out, making it difficult to collect the oil and causing it to fall onto the transformer. This can corrode and damage the transformer surface, and severe corrosion can lead to holes or cracks, resulting in a decrease in the sealing performance of the transformer tank and increasing the risk of oil leakage. Therefore, it is necessary to improve the pressure relief device for oil-immersed transformers to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a pressure relief device for an oil-immersed transformer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure relief device for an oil-immersed transformer, comprising an oil-immersed transformer housing, a mounting frame fixedly connected to the bottom of the oil-immersed transformer housing, a drain pipe fixedly connected to the left side of the oil-immersed transformer housing, an insulating terminal fixedly connected to the top of the oil-immersed transformer housing, a radiator fixedly connected to the right side of the oil-immersed transformer housing, a mounting flange fixedly connected to the top of the oil-immersed transformer housing, a pressure relief mechanism installed on the top of the mounting flange, and an auxiliary exhaust mechanism installed on the top of the oil-immersed transformer housing;

[0006] The pressure relief mechanism includes an adjustable mounting component and a pressure relief component, with the pressure relief component positioned on top of the adjustable mounting component.

[0007] Preferably, the adjusting installation assembly includes a connecting flange, which is disposed on top of the mounting flange. A limit frame is fixedly connected inside the connecting flange, and a mounting plate is slidably connected inside the limit frame. A slide rod is fixedly connected to the top of the mounting plate, and a first spring is fixedly connected to the bottom of the slide rod. A sliding plate is fixedly connected to the bottom of the first spring, and a locking block is fixedly connected to the bottom of the sliding plate, which facilitates the adjustment of the position of the mounting plate, thereby meeting the installation and use requirements of different models of mounting flanges.

[0008] Preferably, the sliding plate and the sliding rod are slidably connected, the limiting frame and the corresponding position of the locking block are provided with a groove, and the locking block is inserted into the groove. A locking bolt is provided between the mounting plate and the mounting flange to facilitate a more stable installation process.

[0009] Preferably, the pressure relief assembly includes a connecting pipe, which is fixedly connected to the top of the connecting flange. A first connecting platform is fixedly connected to the back of the connecting pipe, and a second connecting platform is fixedly connected to the front of the connecting pipe. A threaded rod is rotatably connected inside the first connecting platform, and a limit rod is fixedly connected inside the second connecting platform. A movable plate is slidably connected to the outside of the limit rod. A second spring is fixedly connected to the bottom of the movable plate, and a sealing block is fixedly connected to the bottom of the second spring. A fixing ring is fixedly connected inside the connecting pipe, which facilitates adjusting the position of the movable plate to adjust the tension of the second spring, thereby satisfying the requirement of automatic pressure relief of the oil pressure inside the oil-immersed transformer shell while achieving a sealing effect.

[0010] Preferably, the movable plate is threadedly connected to the threaded rod, and the sealing block is in contact with the fixed ring, which facilitates a more stable adjustment process.

[0011] Preferably, the movable plate is slidably connected to the first connecting platform, the movable plate is slidably connected to the second connecting platform, and the movable plate is slidably connected to the connecting pipe, which facilitates a more stable pressure relief process.

[0012] Preferably, the auxiliary exhaust mechanism includes a gas-liquid separator, which is fixedly connected to the top of the oil-immersed transformer housing. A level gauge is fixedly connected to the front of the gas-liquid separator, an oil drain pipe is fixedly connected to the left side of the gas-liquid separator, an air inlet pipe is fixedly connected to the top of the connecting pipe, and a U-shaped exhaust pipe is fixedly connected inside the gas-liquid separator. This facilitates the separation of the gas-liquid mixture, allowing liquid oil particles to collide with the surface of an obstacle due to their high inertia and fall, while the gas, due to its good fluidity, bypasses the obstacle and continues to flow, thus preventing the oil from being discharged during the exhaust process.

[0013] Compared with the prior art, this utility model provides a pressure relief device for an oil-immersed transformer, which has the following advantages:

[0014] 1. The pressure relief device of this oil-immersed transformer, through the installation pressure relief mechanism, allows for easy adjustment of the mounting plate position by the movement of the sliding plate in conjunction with the first spring, thus accommodating the installation of different types of mounting flanges. The rotation of the threaded rod, in conjunction with the limit rod, allows for easy adjustment of the position of the movable plate, thereby adjusting the tension of the second spring. This achieves automatic pressure relief of the oil pressure inside the oil-immersed transformer shell while maintaining a sealing effect.

[0015] 2. The pressure relief device of this oil-immersed transformer, through the auxiliary exhaust mechanism, introduces the gas-liquid mixture into the gas-liquid separator through the air inlet pipe during use, so as to achieve the separation of the gas-liquid mixture. The liquid oil particles collide with the surface of the obstacle due to their large inertia and fall down, while the gas, due to its good fluidity, bypasses the obstacle and continues to flow, thus avoiding the discharge of oil during the exhaust process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the adjustment and installation component structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the adjustment and installation component of this utility model;

[0020] Figure 4 This is a schematic diagram of the pressure relief component structure of this utility model;

[0021] Figure 5 This is a schematic cross-sectional view of the pressure relief component of this utility model;

[0022] Figure 6 This is a schematic diagram of the auxiliary exhaust mechanism of this utility model;

[0023] Figure 7 This is a cross-sectional structural diagram of the auxiliary exhaust mechanism of this utility model.

[0024] In the diagram: 1. Oil-immersed transformer housing; 2. Mounting frame; 3. Drain pipe; 4. Insulating terminal; 5. Radiator; 6. Mounting flange; 7. Pressure relief mechanism; 71. Adjustable mounting assembly; 711. Connecting flange; 712. Limiting bracket; 713. Mounting plate; 714. Sliding rod; 715. First spring; 716. Sliding plate; 717. Locking block; 72. Pressure relief assembly; 721. Connecting pipe; 722. First connecting platform; 723. Second connecting platform; 724. Threaded rod; 725. Limiting rod; 726. Movable plate; 727. Second spring; 728. Sealing block; 729. Fixing ring; 8. Auxiliary exhaust mechanism; 81. Gas-liquid separator; 82. Level gauge; 83. Oil drain pipe; 84. Air inlet pipe; 85. U-shaped exhaust pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0027] Please see Figure 1-6 This utility model provides a technical solution: a pressure relief device for an oil-immersed transformer, including an oil-immersed transformer housing 1, an installation frame 2 fixedly connected to the bottom of the oil-immersed transformer housing 1, a drain pipe 3 fixedly connected to the left side of the oil-immersed transformer housing 1, an insulating terminal 4 fixedly connected to the top of the oil-immersed transformer housing 1, a radiator 5 fixedly connected to the right side of the oil-immersed transformer housing 1, an installation flange 6 fixedly connected to the top of the oil-immersed transformer housing 1, a pressure relief mechanism 7 installed on the top of the installation flange 6, and an auxiliary exhaust mechanism 8 installed on the top of the oil-immersed transformer housing 1;

[0028] The pressure relief mechanism 7 includes an adjustment mounting assembly 71 and a pressure relief assembly 72, with the pressure relief assembly 72 located on top of the adjustment mounting assembly 71.

[0029] Furthermore, the adjusting mounting assembly 71 includes a connecting flange 711, which is located on top of the mounting flange 6. A limit frame 712 is fixedly connected inside the connecting flange 711. A mounting plate 713 is slidably connected inside the limit frame 712. A slide rod 714 is fixedly connected to the top of the mounting plate 713. A first spring 715 is fixedly connected to the bottom of the slide rod 714. A sliding plate 716 is fixedly connected to the bottom of the first spring 715. A locking block 717 is fixedly connected to the bottom of the sliding plate 716, which facilitates the adjustment of the position of the mounting plate 713, thereby meeting the installation and use requirements of different models of mounting flanges 6.

[0030] Furthermore, the slide plate 716 is slidably connected to the slide rod 714, the limit frame 712 and the corresponding position of the locking block 717 are provided with grooves, and the locking block 717 is inserted into the groove. Locking bolts are provided between the mounting plate 713 and the mounting flange 6 to facilitate a more stable installation process.

[0031] Furthermore, the pressure relief assembly 72 includes a connecting pipe 721, which is fixedly connected to the top of the connecting flange 711. A first connecting platform 722 is fixedly connected to the back of the connecting pipe 721, and a second connecting platform 723 is fixedly connected to the front of the connecting pipe 721. A threaded rod 724 is rotatably connected inside the first connecting platform 722, and a limit rod 725 is fixedly connected inside the second connecting platform 723. A movable plate 726 is slidably connected to the outside of the limit rod 725. A second spring 727 is fixedly connected to the bottom of the movable plate 726, and a sealing block 728 is fixedly connected to the bottom of the second spring 727. A fixing ring 729 is fixedly connected inside the connecting pipe 721, which facilitates the adjustment of the position of the movable plate 726, thereby adjusting the tension of the second spring 727, so as to meet the requirements of automatic pressure relief of the oil pressure inside the oil-immersed transformer shell 1 while achieving a sealing effect.

[0032] Furthermore, the movable plate 726 is threadedly connected to the threaded rod 724, and the sealing block 728 contacts the fixing ring 729, which facilitates a more stable adjustment process.

[0033] Furthermore, the movable plate 726 is slidably connected to the first connecting platform 722, the movable plate 726 is slidably connected to the second connecting platform 723, and the movable plate 726 is slidably connected to the connecting pipe 721, which facilitates a more stable pressure relief process. Example

[0034] Based on Example 1, please refer to Figure 7 Furthermore, in conjunction with Embodiment 1, the auxiliary exhaust mechanism 8 includes a gas-liquid separation box 81, which is fixedly connected to the top of the oil-immersed transformer housing 1. A level gauge 82 is fixedly connected to the front of the gas-liquid separation box 81, an oil drain pipe 83 is fixedly connected to the left side of the gas-liquid separation box 81, an air inlet pipe 84 is fixedly connected to the top of the connecting pipe 721, and a U-shaped exhaust pipe 85 is fixedly connected inside the gas-liquid separation box 81. This facilitates the separation of the gas-liquid mixture, allowing liquid oil particles to collide with the surface of an obstacle due to their large inertia and fall down, while the gas, due to its good fluidity, bypasses the obstacle and continues to flow, thus preventing the oil from being discharged during the exhaust process.

[0035] In actual operation, when this device is used, the threaded rod is a T-type threaded rod to provide self-locking, and the relevant connecting parts are sealed with rubber sealing rings. The operator adjusts and installs the device according to different models of mounting flanges 6. The operator pulls the sliding plate 716, which, in conjunction with the first spring 715, moves the locking block 717. This movement, along with the movement of the sliding rod 714, causes the mounting plate 713 to slide inside the limiting frame 712 until it reaches the designated position. Then, the sliding plate 716 is released, and under the action of the first spring 715, the locking block 717 inserts into the limiting frame 712. After installation, the operator adjusts the device according to the pressure relief requirements using a hex wrench, etc. The tool rotates the threaded rod 724. The rotation of the threaded rod 724, in conjunction with the limit rod 725, causes the movable plate 726 to move, thereby adjusting the tension of the second spring 727. When the oil pressure inside the oil-immersed transformer housing 1 changes, the sealing block 728 moves, in conjunction with the second spring 727, thus satisfying the automatic pressure relief of the oil pressure inside the oil-immersed transformer housing 1 while maintaining a sealing effect. The gas-liquid mixture is introduced into the gas-liquid separator 81 through the air inlet pipe 84. Due to its large inertia, the liquid oil particles collide with the surface of the obstacle and fall down. The gas, due to its good fluidity, bypasses the obstacle and continues to flow, and is discharged in conjunction with the U-shaped exhaust pipe 85. The liquid level gauge 82 is used to monitor the oil level inside the gas-liquid separator 81.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A pressure relief device for an oil-immersed transformer, comprising an oil-immersed transformer housing (1), characterized in that: The bottom of the oil-immersed transformer housing (1) is fixedly connected to an installation frame (2), the left side of the oil-immersed transformer housing (1) is fixedly connected to a drain pipe (3), the top of the oil-immersed transformer housing (1) is fixedly connected to an insulating terminal (4), the right side of the oil-immersed transformer housing (1) is fixedly connected to a radiator (5), the top of the oil-immersed transformer housing (1) is fixedly connected to an installation flange (6), the top of the installation flange (6) is provided with an installation pressure relief mechanism (7), and the top of the oil-immersed transformer housing (1) is provided with an auxiliary exhaust mechanism (8). The pressure relief mechanism (7) includes an adjustment mounting assembly (71) and a pressure relief assembly (72), wherein the pressure relief assembly (72) is disposed on top of the adjustment mounting assembly (71).

2. The pressure relief device for an oil-immersed transformer according to claim 1, characterized in that: The adjustment and installation assembly (71) includes a connecting flange (711) which is located on top of the mounting flange (6). A limit frame (712) is fixedly connected inside the connecting flange (711). A mounting plate (713) is slidably connected inside the limit frame (712). A slide rod (714) is fixedly connected to the top of the mounting plate (713). A first spring (715) is fixedly connected to the bottom of the slide rod (714). A sliding plate (716) is fixedly connected to the bottom of the first spring (715). A locking block (717) is fixedly connected to the bottom of the sliding plate (716).

3. The pressure relief device for an oil-immersed transformer according to claim 2, characterized in that: The sliding plate (716) is slidably connected to the sliding rod (714), the limiting frame (712) and the corresponding position of the locking block (717) are provided with grooves, and the locking block (717) is inserted into the groove. A locking bolt is provided between the mounting plate (713) and the mounting flange (6).

4. The pressure relief device for an oil-immersed transformer according to claim 2, characterized in that: The pressure relief assembly (72) includes a connecting pipe (721), which is fixedly connected to the top of the connecting flange (711). A first connecting platform (722) is fixedly connected to the back of the connecting pipe (721), and a second connecting platform (723) is fixedly connected to the front of the connecting pipe (721). A threaded rod (724) is rotatably connected inside the first connecting platform (722), and a limit rod (725) is fixedly connected inside the second connecting platform (723). A movable plate (726) is slidably connected to the outside of the limit rod (725), and a second spring (727) is fixedly connected to the bottom of the movable plate (726). A sealing block (728) is fixedly connected to the bottom of the second spring (727), and a fixing ring (729) is fixedly connected inside the connecting pipe (721).

5. The pressure relief device for an oil-immersed transformer according to claim 4, characterized in that: The movable plate (726) is threadedly connected to the threaded rod (724), and the sealing block (728) is in contact with the fixing ring (729).

6. The pressure relief device for an oil-immersed transformer according to claim 4, characterized in that: The movable plate (726) is slidably connected to the first connecting platform (722), the movable plate (726) is slidably connected to the second connecting platform (723), and the movable plate (726) is slidably connected to the connecting pipe (721).

7. The pressure relief device for an oil-immersed transformer according to claim 4, characterized in that: The auxiliary exhaust mechanism (8) includes a gas-liquid separator (81), which is fixedly connected to the top of the oil-immersed transformer housing (1). A level gauge (82) is fixedly connected to the front of the gas-liquid separator (81), an oil drain pipe (83) is fixedly connected to the left side of the gas-liquid separator (81), an air inlet pipe (84) is fixedly connected to the top of the connecting pipe (721), and a U-shaped exhaust pipe (85) is fixedly connected inside the gas-liquid separator (81).

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