A transformer explosion-proof pressure relief valve assembly

Abstract

The utility model discloses a transformer explosion -proof pressure release valve subassembly, the valve core device includes the fixed assembly of setting in the pressure release valve body, the pressure release valve body is provided with the valve core subassembly for up and down movement, and valve core subassembly penetrates fixed assembly, the bottom fixed mounting of valve core subassembly is used for the pressure -relief explosion -proof pressure -relief subassembly, thereby, when the transformer short circuit occurs, when the pressure of pressure release valve body exceeds the safe value, the burst membrane breaks along the prefabricated notch, forms the large -flow pressure -relief passage, prevents the explosion of transformer, and the bottom of membrane disc adds silica gel damping pad simultaneously, resets automatically through the deformation memory characteristic after pressure relief, avoids the failure of traditional spring because of fatigue, can prevent the explosion of transformer, and the three -stage pressure -relief mechanism of pressure release valve body makes the explosion -proof pressure of oil tank promotion, reaches the explosion -proof state of pressure release valve body.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer pressure relief valves, and in particular to a transformer explosion-proof pressure relief valve assembly. Background Technology

[0002] The function of a transformer pressure relief valve is to prevent the transformer tank from deforming and exploding due to excessive pressure. Pressure relief valves are used in large and medium-sized transformers instead of explosion-proof pipes. Transformer pressure relief valves are generally installed at the bottom of the transformer tank.

[0003] The existing transformer pressure relief valve protects the transformer oil from the outside air when the transformer is working normally. Once a short circuit fault occurs in the transformer, the transformer windings will generate an electric arc and sparks, causing the transformer oil to generate a large amount of gas in an instant. The pressure in the oil tank will increase significantly, and the pressure relief valve will automatically close, preventing the transformer oil tank from deforming and exploding due to excessive pressure.

[0004] However, when using transformer pressure relief valves, because they typically employ a single spring-diaphragm structure, the pressure relief speed is insufficient when faced with the instantaneous high pressure generated by a sudden high-energy electric arc, which can easily lead to the tank bursting. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, this utility model proposes a transformer explosion-proof pressure relief valve assembly. When a transformer experiences a short circuit and the pressure on the pressure relief valve body exceeds a safe value, the rupture diaphragm breaks along pre-made grooves, forming a high-flow-rate pressure relief channel to prevent the transformer from exploding. Simultaneously, a silicone damping pad is added to the bottom of the diaphragm, which automatically resets after pressure relief due to its deformation memory characteristics, avoiding the failure of traditional springs caused by fatigue. This prevents transformer explosions. Furthermore, the three-stage pressure relief mechanism of the pressure relief valve body increases the explosion-proof pressure of the oil tank, achieving an explosion-proof state for the pressure relief valve body.

[0007] To achieve the above objectives, this utility model proposes a transformer explosion-proof pressure relief valve assembly, including a pressure relief valve body. The pressure relief valve body contains an explosion-proof valve core device. The valve core device includes a fixing component disposed within the pressure relief valve body. The pressure relief valve body contains a valve core assembly for vertical movement, and the valve core assembly penetrates the fixing component. A pressure relief component for explosion-proof pressure relief is fixedly installed at the bottom of the valve core assembly. The pressure relief component includes a diaphragm plate fixedly installed at the bottom of the valve core rod. A silicone damping pad is added to the bottom of the diaphragm plate. Four rupture membranes for pressure relief are disposed on the diaphragm plate.

[0008] In addition, the transformer explosion-proof pressure relief valve assembly proposed above in this application may also have the following additional technical features: Specifically, a flange pipe is fixedly installed at the left end of the pressure relief valve body, and a core seat for fixing the fixing components is provided inside the pressure relief valve body.

[0009] Specifically, the top of the pressure relief valve body is provided with a valve cover for sealing the pressure relief valve body, and the valve cover is installed on the top of the pressure relief valve body by bolts.

[0010] Specifically, a flange for connecting the pressure relief valve body to the transformer oil circuit is fixedly installed at the bottom end of the pressure relief valve body.

[0011] Specifically, the valve core assembly includes a valve core rod disposed within the pressure relief valve body for passing through the valve cover and the core seat, and a handwheel is fixedly mounted on the top end of the valve core rod.

[0012] Specifically, the fixing assembly includes a core cover disposed within the core seat for limiting the pressure relief assembly, and the core cover contains a spring for mounting on the valve stem.

[0013] Compared with the prior art, the beneficial effects of this application are as follows: By incorporating a pressure relief component, when a transformer experiences a short circuit and the pressure in the pressure relief valve exceeds a safe value, the rupture diaphragm breaks along pre-made grooves, forming a high-flow pressure relief channel to prevent transformer explosion. Simultaneously, a silicone damping pad is added to the bottom of the diaphragm, which automatically resets after pressure relief due to its deformation memory characteristics, avoiding fatigue-induced failure of traditional springs. This further prevents transformer explosion. Furthermore, the three-stage pressure relief mechanism of the pressure relief valve increases the explosion-proof pressure of the oil tank, achieving an explosion-proof state for the pressure relief valve itself.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the overall structure of a transformer explosion-proof pressure relief valve assembly according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of the pressure relief valve body of a transformer explosion-proof pressure relief valve assembly according to an embodiment of the present invention. Figure 3This is a schematic diagram of the valve core device structure of a transformer explosion-proof pressure relief valve assembly according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the pressure relief component structure of a transformer explosion-proof pressure relief valve assembly according to one embodiment of the present invention.

[0016] As shown in the figure: 100, pressure relief valve body; 101, flange pipe; 102, flange plate; 103, core seat; 104, valve cover; 200, valve core device; 210, valve core assembly; 211, handwheel; 212, valve core rod; 220, fixing assembly; 221, core cover; 222, spring; 230, pressure relief assembly; 231, diaphragm plate; 232, rupture diaphragm. Detailed Implementation

[0017] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0018] The following description, in conjunction with the accompanying drawings, describes a transformer explosion-proof pressure relief valve assembly according to an embodiment of the present invention.

[0019] like Figures 1-4 As shown, an explosion-proof pressure relief valve assembly for a transformer according to an embodiment of the present invention may include a pressure relief valve body 100, within which a valve core device 200 for explosion-proof operation is disposed; the valve core device 200 includes a fixing component 220 disposed within the pressure relief valve body 100, a valve core assembly 210 for vertical movement disposed within the pressure relief valve body 100, and the valve core assembly 210 penetrates the fixing component 220; a pressure relief component 230 for explosion-proof pressure relief is fixedly installed at the bottom end of the valve core assembly 210; from When a transformer short-circuites and the pressure in the pressure relief valve body 100 exceeds the safe value, the rupture diaphragm 232 breaks along the pre-made grooves, forming a high-flow pressure relief channel to prevent the transformer from exploding. At the same time, a silicone damping pad is added to the bottom of the diaphragm 231, which automatically resets after pressure relief through deformation memory characteristics, avoiding the failure of the traditional spring 222 due to fatigue. Therefore, it can prevent the transformer from exploding. At the same time, the three-stage pressure relief mechanism of the pressure relief valve body 100 increases the explosion-proof pressure of the oil tank to achieve the explosion-proof state of the pressure relief valve body 100.

[0020] In one embodiment of this utility model, such as Figure 2 and Figure 3As shown, a flange pipe 101 is fixedly installed on the left end of the pressure relief valve body 100, and a core seat 103 for fixing the fixing component 220 is provided inside the pressure relief valve body 100.

[0021] Furthermore, a valve cover 104 is provided at the top of the pressure relief valve body 100 for sealing the pressure relief valve body 100. The valve cover 104 is installed at the top of the pressure relief valve body 100 by bolts. A double O-ring fluororubber ring is provided between the valve cover 104 and the pressure relief valve body 100 to form a redundant sealing structure, which extends the temperature resistance range to about -40℃ to 200℃. Therefore, the pressure relief valve body 100 can be opened through the valve cover 104 to replace and clean the components inside the pressure relief valve body 100.

[0022] Furthermore, a flange 102 for connecting the pressure relief valve body 100 to the transformer oil circuit is fixedly installed at the bottom end of the pressure relief valve body 100; clean the transformer oil tank mounting surface, apply flat sealant, and install the pressure relief valve body 100 on the transformer. Align the flange 102 of the pressure relief valve body 100 with the oil tank flange and insert the self-locking quick-release bolts; at the same time, lead out the intelligent module antenna and connect it to the transformer terminal box.

[0023] In one embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the valve core assembly 210 includes a valve core rod 212 disposed within the pressure relief valve body 100 for passing through the valve cover 104 and the core seat 103, and a handwheel 211 is fixedly installed at the top end of the valve core rod 212.

[0024] Furthermore, the fixing component 220 includes a core cover 221 disposed within the core seat 103 for limiting the pressure relief component 230. The core cover 221 is provided with a spring 222 for mounting on the valve core rod 212. The spring 222 has micron-level precision. When the pressure reaches a set threshold, the pressure relief component 230 opens instantaneously to form an initial pressure relief channel, thus alleviating the sudden increase in pressure.

[0025] Furthermore, the pressure relief assembly 230 includes a diaphragm disc 231 fixedly mounted at the bottom end of the valve core rod 212. The diaphragm disc 231 is coated with a diamond-like carbon film, achieving a hardness of HV3000 and improved wear resistance. The disc body of the diaphragm disc 231 is provided with four ruptured membranes 232 for pressure relief. Each ruptured membrane 232 has a thickness of 0.15 mm and a groove depth of 0.03 mm to facilitate pressure surges within the pressure relief valve body 100. The grooves on the ruptured membranes 232 facilitate pressure relief. This causes the rupture membrane 232 to rupture, forming a high-flow-rate pressure relief channel. The rupture membrane 232 is a laser-engraved titanium alloy membrane. When the pressure exceeds the safe value, the rupture membrane 232 ruptures along the pre-made grooves, forming a high-flow-rate pressure relief channel to prevent the transformer from exploding. At the same time, a silicone damping pad is added to the bottom of the membrane plate 231. After pressure relief, it automatically resets through deformation memory characteristics, avoiding the failure of the traditional spring 222 due to fatigue. The rupture membrane 232 is replaced regularly, and the spring 222 is returned to the factory for repair.

[0026] In summary, the transformer explosion-proof pressure relief valve assembly of this utility model ensures that when a transformer short-circuit occurs and the pressure of the pressure relief valve body 100 exceeds the safe value, the rupture diaphragm 232 ruptures along the pre-made grooves, forming a high-flow-rate pressure relief channel to prevent the transformer from exploding. Simultaneously, a silicone damping pad is added to the bottom of the diaphragm disc 231, which automatically resets after pressure relief due to deformation memory characteristics, avoiding the failure of the traditional spring 222 due to fatigue. Therefore, it can prevent the transformer from exploding. Furthermore, the three-stage pressure relief mechanism of the pressure relief valve body 100 increases the explosion-proof pressure of the oil tank, achieving the explosion-proof state of the pressure relief valve body 100.

[0027] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A transformer explosion relief valve assembly, characterized by, The device includes a pressure relief valve body (100), which contains an explosion-proof valve core device (200). The valve core device (200) includes a fixing component (220) disposed within the pressure relief valve body (100). The pressure relief valve body (100) contains a valve core assembly (210) for vertical movement, and the valve core assembly (210) passes through the fixing component (220). A pressure relief assembly (230) for pressure relief and explosion prevention is fixedly installed at the bottom of the valve core assembly (210). The pressure relief assembly (230) includes a diaphragm disc (231) fixedly installed at the bottom of the valve core rod (212). A silicone damping pad is added to the bottom of the diaphragm disc (231). A bursting membrane (232) for pressure relief is disposed on the disc body of the diaphragm disc (231), and there are four bursting membranes (232).

2. A transformer explosion relief valve assembly according to claim 1, wherein, A flange pipe (101) is fixedly installed on the left end of the pressure relief valve body (100), and a core seat (103) for fixing the fixing component (220) is provided inside the pressure relief valve body (100).

3. A transformer explosion relief valve assembly according to claim 2, wherein, The top of the pressure relief valve body (100) is provided with a valve cover (104) for sealing the pressure relief valve body (100), and the valve cover (104) is installed on the top of the pressure relief valve body (100) by bolts.

4. A transformer explosion relief valve assembly according to claim 3, wherein, The bottom end of the pressure relief valve body (100) is fixedly equipped with a flange (102) for connecting the pressure relief valve body (100) to the transformer oil circuit.

5. A transformer explosion relief valve assembly according to claim 3, wherein, The valve core assembly (210) includes a valve core rod (212) disposed within the pressure relief valve body (100) for passing through the valve cover (104) and the core seat (103), and a handwheel (211) is fixedly installed at the top of the valve core rod (212).

6. A transformer explosion relief valve assembly according to claim 5, wherein, The fixing assembly (220) includes a core cover (221) disposed within the core seat (103) for limiting the pressure relief assembly (230), and the core cover (221) is provided with a spring (222) for fitting onto the valve stem (212).

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