An explosion-proof oil-immersed transformer with a processing module

Abstract

This invention discloses an explosion-proof oil-immersed transformer with a processing module, relating to the field of oil-immersed transformer technology. The invention includes a transformer body and an explosion-proof processing module. The transformer body includes an insulating oil tank, on which corrugated heat sinks are fixedly installed on all four sides. Multiple heat exchange slots are formed on both sides of the insulating oil tank, and multiple horizontally arranged internal pressure relief pipes connected to the insulating oil tank are fixedly installed inside each heat exchange slot. This invention, by setting up a cooling power unit and a circulation unit, enables the cooling oil pump to circulate and deliver cooling oil, providing sufficient cooling for the insulating oil to prevent heat accumulation. When an abnormality or damage occurs inside the transformer body, the cooling power unit and circulation unit efficiently relieve pressure, effectively preventing the transformer body from rupturing and exploding. This provides an additional pressure relief method when the pressure relief mechanism of a traditional oil-immersed transformer is inefficient or damaged.

Description

Technical Field

[0001] This invention relates to the field of oil-immersed transformer technology, and more specifically to an explosion-proof oil-immersed transformer with a processing module. Background Technology

[0002] A transformer is a power device that uses the principle of electromagnetic induction to convert alternating current into different voltage and current parameters. It includes oil-immersed transformers and dry-type transformers. In oil-immersed transformers, the iron core and windings are completely immersed in an oil tank filled with insulating oil to enhance insulation and improve heat dissipation. When a transformer faces serious overload, short circuit, or insulation damage, the insulating oil in the tank will decompose due to high temperature or electric arc, producing a large amount of hydrocarbon mixture gas. This causes the internal pressure to rise sharply, which may eventually lead to the destruction of the tank structure and an explosion.

[0003] Existing oil-immersed transformers mainly rely on internal and external pressure relief valves, explosion-proof pipes, and safety vents as pressure relief mechanisms to promptly drain oil and relieve pressure in emergency situations, thereby reducing the risk of tank pressure surge and explosion. However, when the internal insulating oil, mixed gas, and oil mist expand dramatically due to heat, traditional pressure relief mechanisms alone are insufficient to relieve pressure in time, lacking a means of preventing damage. Therefore, an explosion-proof oil-immersed transformer with a processing module is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing oil-immersed transformers cannot effectively release pressure in a timely manner using traditional pressure relief mechanisms, and lack a means of preventing damage. This invention provides an explosion-proof oil-immersed transformer with a processing module.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution: An explosion-proof oil-immersed transformer with a processing module includes a transformer body and an explosion-proof processing module. The transformer body includes an insulating oil tank. Corrugated heat sinks are fixedly installed on all four sides of the insulating oil tank. Multiple heat exchange slots are opened on both sides of the insulating oil tank. Multiple horizontally arranged internal pressure relief pipes connected to the insulating oil tank are fixedly installed inside the heat exchange slots. A first oil-draining explosion-proof membrane is fixedly installed inside the internal pressure relief pipes. The explosion-proof treatment module includes a cooling power unit and a circulation unit. The cooling power unit includes an oil pump box, inside which a cooling oil pump is fixedly installed. An oil inlet pipe connected to the circulation unit is fixedly installed at the input end of the cooling oil pump. An oil delivery tee is fixedly installed at the output end of the cooling oil pump. Oil delivery pipes are fixedly installed at both ends of the oil delivery tee. The oil delivery pipe has two flow channels inside, and the two ends of the oil delivery tee are respectively connected to two of the flow channels. Multiple Q-shaped tubes are fixedly installed at the top of each oil delivery pipe, and the two ends of each Q-shaped tube are respectively connected to the two flow channels. Multiple external pressure relief pipes are fixedly installed on one side of each Q-shaped tube. A second oil leakage explosion-proof membrane is fixedly installed inside each external pressure relief pipe. The other end of each oil delivery pipe is fixedly installed with the same return oil tee. One end of the return oil tee is respectively connected to the remaining two flow channels, and the other end of the return oil tee is connected to the circulation unit.

[0006] Furthermore, the explosion-proof treatment module also includes a nitrogen sealing unit, which includes a nitrogen tank storage box. The nitrogen tank storage box contains a high-pressure nitrogen tank assembly. A gas supply pipe is fixedly installed on one side of the nitrogen tank storage box. One end of the gas supply pipe extends into the nitrogen tank storage box and is connected to the high-pressure nitrogen tank. A gas valve is fixedly installed on one end of the oil supply tee pipe, and the other end of the gas supply pipe is connected to one end of the oil supply tee pipe.

[0007] Furthermore, a small integrated air conditioner is fixedly installed on one side of the nitrogen tank storage box, and a canopy is fixedly installed on one side of the top of the nitrogen tank storage box, with the canopy located above the small integrated air conditioner.

[0008] Furthermore, the oil inlet pipe is provided with a Z-shaped pipe section, which extends into the interior of the nitrogen storage tank.

[0009] Furthermore, the circulation unit includes a return oil tank, and both the oil inlet pipe and the return oil tee pipe are connected to the return oil tank. A second pressure relief valve is provided on the top of the return oil tank.

[0010] Furthermore, a sealing groove is provided at the connection between the outer end of the inner pressure relief pipe and the heat exchange tank, and a sealing sleeve that matches the sealing groove is fixedly sleeved at the connection between the outer pressure relief pipe and the Q-shaped pipe, and a reinforcing frame is fixedly installed on the inner ring of the Q-shaped pipe.

[0011] Furthermore, horizontally arranged pressure relief strip boxes are fixedly installed on both sides of the top of the insulating oil tank. Multiple pressure relief holes communicating with the interior of the insulating oil tank are opened on one side of the pressure relief strip box. A venting explosion-proof membrane is fixedly installed inside each pressure relief hole. A rectifier strip box is fixedly installed inside the pressure relief strip box. The pressure relief holes are all connected to the rectifier strip box. Multiple evenly distributed first pressure relief valves are fixedly installed on one side of the rectifier strip box.

[0012] Furthermore, a partition is fixedly installed inside the internal pressure relief pipe, and a compressed air bladder is fixedly installed on the side of the partition away from the first pressure relief valve. One end of the first pressure relief valve passes through the partition and is connected to the inside of the compressed air bladder. An end cap is fitted on the side of the pressure relief strip box away from the insulating oil tank. Multiple self-locking buckles are provided on the top and bottom of the pressure relief strip box, and the end cap is fixedly assembled with the pressure relief strip box through the self-locking buckles.

[0013] The beneficial effects of this invention are as follows: 1. This invention, by setting up a cooling power unit and a circulation unit, enables the cooling oil pump to circulate and deliver cooling oil, providing sufficient cooling for the insulating oil to prevent heat accumulation. When an abnormality or damage occurs inside the transformer body, the cooling power unit and circulation unit perform efficient pressure relief, effectively preventing the transformer body from rupturing and exploding. It provides an additional pressure relief method when the pressure relief mechanism of the traditional oil-immersed transformer is inefficient or damaged. 2. By setting up a nitrogen sealing unit, when the oil pressure is continuously discharged to a safe value, the gas valve opens, and the high-pressure nitrogen valve group inside the nitrogen tank delivers nitrogen to the cooling oil circuit through the gas delivery pipe. Then, high-purity nitrogen is introduced into the insulating oil tank through various external and internal pressure relief pipes to stir and cool down rapidly, and replace oxygen to below the limit oxygen concentration, thereby blocking the combustion chain and achieving dual protection of oil discharge and nitrogen delivery. 3. This invention incorporates a small integrated air conditioning unit, which cools and ventilates the nitrogen storage tank, providing a suitable environment for nitrogen storage and ensuring normal operation in emergencies. Simultaneously, a cooling oil pump draws oil of the same type as the insulating oil in the insulating oil tank from the circulation unit as a heat exchange medium. The oil is transported through the oil inlet pipe and passes through the zigzag section on the oil inlet pipe, passing through the inside of the nitrogen storage tank, thereby cooling the oil and ensuring sufficient heat dissipation. 4. By setting a first pressure relief valve, the gas pressure in the insulating oil tank gradually increases after a large amount of nitrogen is injected. When the pressure exceeds the safety threshold, the gas relief and explosion-proof membranes on both sides will gradually rupture, thereby delivering the mixed gas including nitrogen through the pressure relief hole to the rectifier box. Then, under the action of gas pressure, the first pressure relief valve is opened to deliver gas into the compression bladder until the compression bladder expands and pushes open the self-locking buckle, popping out the end cover and continuing to expand. This provides fault tolerance for the control of nitrogen delivery, preventing excessive nitrogen delivery from causing excessive gas pressure inside the insulating oil tank and causing secondary damage. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the transformer body of the present invention; Figure 3 This is the present invention. Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 This is a three-dimensional structural diagram of the explosion-proof care module of the present invention; Figure 5 This is a three-dimensional structural diagram of the cooling oil pump and return oil tank of the present invention; Figure 6 This is a three-dimensional structural diagram of the oil pipeline and Q-shaped pipe of the present invention. Figure 7 This is the present invention. Figure 6 Schematic diagram of the structure at point B; Figure 8 This is a three-dimensional structural diagram of the pressure relief strip box of the present invention; Figure 9 This is a schematic diagram of the internal three-dimensional structure of the pressure relief strip box of the present invention; Attached reference numerals: 1. Transformer body; 101. Insulating oil tank; 102. Corrugated heat sink; 103. Heat exchanger; 104. Internal pressure relief pipe; 105. First oil relief explosion-proof membrane; 106. Sealing groove; 107. Pressure relief bar box; 108. Pressure relief hole; 109. Venting explosion-proof membrane; 110. Rectifier bar box; 111. First pressure relief valve; 112. Partition plate; 113. Compressed air bladder; 114. End cover; 115. Self-locking buckle; 2. Cooling power unit; 201. Oil pump box; 202. Cooling oil Pump; 203, Oil inlet pipe; 204, Oil delivery tee pipe; 205, Oil delivery pipe; 206, Q-shaped pipe; 207, External pressure relief pipe; 208, Second oil discharge explosion-proof membrane; 209, Oil return tee pipe; 210, Sealing sleeve; 211, Reinforcing frame; 212, Z-shaped pipe section; 3, Circulation unit; 301, Oil return tank; 302, Second pressure relief valve; 4, Nitrogen sealing unit; 401, Nitrogen tank storage box; 402, Gas delivery pipe; 403, Gas valve; 404, Small integrated air conditioner unit; 405, Awning. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limiting the present invention.

[0019] like Figures 1 to 9 As shown, an explosion-proof oil-immersed transformer with a processing module includes a transformer body 1 and an explosion-proof processing module, such as... Figure 1 , Figure 2 , Figure 3 As shown, specifically, the transformer body 1 includes an insulating oil tank 101. Corrugated heat sinks 102 are fixedly installed on all four sides of the insulating oil tank 101. Multiple heat exchange slots 103 are opened on both sides of the insulating oil tank 101. Multiple horizontally arranged internal pressure relief pipes 104 connected to the insulating oil tank 101 are fixedly installed inside each heat exchange slot 103. Figure 4 , Figure 6 , Figure 7As shown, multiple Q-shaped tubes 206 are fixedly installed on the top of the oil pipeline 205. The two ends of the Q-shaped tubes 206 are connected to two flow channels respectively. Multiple external pressure relief pipes 207 are fixedly installed on one side of the Q-shaped tubes 206. A sealing groove 106 is opened at the connection between the outer end of the internal pressure relief pipe 104 and the heat exchange tank 103. A sealing sleeve 210 that matches the sealing groove 106 is fixedly sleeved at the connection between the external pressure relief pipe 207 and the Q-shaped tube 206. A reinforcing frame 211 is fixedly installed on the inner ring of the Q-shaped tube 206.

[0020] In this embodiment, in addition to the insulating oil tank 101 and the corrugated heat sink 102, the transformer body 1 also includes a hanging plate, conductive rod, high and low voltage terminals, oil level gauge, oil conservator, base, coil group, thermometer, pressure gauge, safety valve group, etc., which are the same type of equipment as the oil-immersed transformers commonly found in the prior art, and will not be described in detail here. The heat exchange tanks 103 are respectively located in the gaps of each corrugated heat sink 102.

[0021] More specifically, before use, the explosion-proof oil-immersed transformer is assembled with the cooling power unit 2, circulation unit 3, and nitrogen sealing unit 4 in sequence using fasteners and bases to the transformer body 1. Multiple Q-shaped tubes 206 are inserted into the grid gaps of each corrugated heat sink 102 and tightly attached to the heat exchange groove 103. At the same time, multiple external pressure relief pipes 207 are inserted into the interior of each internal pressure relief pipe 104, so that the sealing sleeve 210 and the sealing groove 106 are interference-fitted to complete the seal, effectively preventing the leakage of insulating oil during the explosion-proof pressure relief process. The reinforcing frame 211 can ensure that the Q-shaped tubes 206 have sufficient structural strength to prevent the Q-shaped tubes 206 from deforming.

[0022] like Figure 1 , Figure 4 , Figure 5 As shown, specifically, the explosion-proof treatment module includes a cooling power unit 2 and a circulation unit 3. The cooling power unit 2 includes an oil pump box 201, and a cooling oil pump 202 is fixedly installed inside the oil pump box 201. An oil inlet pipe 203 connected to the circulation unit 3 is fixedly installed at the input end of the cooling oil pump 202. A small air conditioner unit 404 is fixedly installed on one side of the nitrogen tank storage box 401. A canopy 405 is fixedly installed on one side of the top of the nitrogen tank storage box 401. The canopy 405 is located above the small air conditioner unit 404. A Z-shaped pipe section 212 is provided on the oil inlet pipe 203, and the Z-shaped pipe section 212 extends into the interior of the nitrogen tank storage box 401.

[0023] In this embodiment, the small integrated air conditioner 404 can be a 0.5 horsepower mini integrated air conditioner commonly used in the prior art.

[0024] More specifically, by setting up a small integrated air conditioner 404, during the normal use of the transformer body 1, the high-voltage nitrogen tank group is stored inside the nitrogen tank storage box 401. The small integrated air conditioner 404 cools and ventilates the nitrogen tank storage box 401, providing a suitable environment for nitrogen storage and ensuring normal operation in emergency situations. At the same time, the cooling oil pump 202 draws oil of the same type as the insulating oil in the insulating oil tank 101 from the circulation unit 3 as a heat exchange medium, and transports it through the oil inlet pipe 203. The cooling oil passes through the zigzag pipe section 212 on the oil inlet pipe 203 and passes through the inside of the nitrogen tank storage box 401, thereby cooling the cooling oil to ensure that the cooling oil has sufficient heat dissipation effect.

[0025] like Figure 3 , Figure 4 , Figure 5 As shown, specifically, a first oil-draining explosion-proof membrane 105 is fixedly installed inside the internal pressure relief pipe 104, an oil delivery tee 204 is fixedly installed at the output end of the cooling oil pump 202, and oil delivery pipes 205 are fixedly installed at both ends of the oil delivery tee 204. The oil delivery pipes 205 have two flow channels inside, and both ends of the oil delivery tee 204 are connected to two of these flow channels respectively. Figure 7 As shown, a second oil leakage explosion-proof membrane 208 is fixedly installed inside the external pressure relief pipe 207. The other end of the oil supply pipe 205 is fixedly installed with the same return oil tee pipe 209. Two ends of the return oil tee pipe 209 are respectively connected to the remaining two flow channels, and the other end of the return oil tee pipe 209 is connected to the circulation unit 3.

[0026] More specifically, by setting up a cooling power unit 2 and a circulation unit 3, the cooling oil pump 202 draws cooling oil and delivers it through the oil delivery tee 204 to one of the flow channels inside the two oil delivery pipes 205, then into the interior of the Q-shaped pipe 206, and then through the other end to the second flow channel, and finally through the return oil tee 209 to the return oil tank 301, completing the sequential circulation. The cooling oil exchanges heat with the insulating oil inside the insulating oil tank 101 through the Q-shaped pipe 206 and the side wall of the heat exchange groove 103, and with the natural heat dissipation of the corrugated heat sink 102, provides sufficient cooling for the insulating oil to prevent heat accumulation and affect the normal operation of the transformer body 1. When an abnormality or damage occurs, the temperature rises sharply, and the insulating oil and gas expand due to heat. At this time, the cooling oil pump 202 stops circulating, and the internal safety valve group of the transformer body 1 begins to automatically depressurize. When the automatic depressurization efficiency is insufficient, the internal pressure of the insulating oil tank 101 continues to rise until the first oil-draining explosion-proof membrane 105 and the second oil-draining explosion-proof membrane 208 at each location rupture in sequence. The oil and gas are transported to the Q-shaped pipe 206 through the internal pressure relief pipe 104 and the external pressure relief pipe 207, and are directly discharged into the circulation unit 3 according to the circulation route for efficient depressurization. This effectively prevents the transformer body 1 from rupturing and exploding, and provides an additional depressurization treatment method when the pressure relief mechanism of the traditional oil-immersed transformer is inefficient or damaged.

[0027] like Figure 1 , Figure 4 As shown, specifically, the explosion-proof treatment module also includes a nitrogen sealing unit 4, which includes a nitrogen tank storage box 401. The nitrogen tank storage box 401 is equipped with a high-pressure nitrogen tank group. A gas supply pipe 402 is fixedly installed on one side of the nitrogen tank storage box 401. One end of the gas supply pipe 402 extends into the nitrogen tank storage box 401 and is connected to the high-pressure nitrogen tank. A gas valve 403 is fixedly installed on one end of the oil supply tee pipe 204, and the other end of the gas supply pipe 402 is connected to one end of the oil supply tee pipe 204.

[0028] In this embodiment, the nitrogen storage tank 401 is equipped with a thermometer, a barometer, a temperature and humidity sensor, etc. Multiple vertical high-pressure nitrogen tanks in the nitrogen storage tank 401 are connected and controlled by a valve group and are connected to the external gas supply pipe 402.

[0029] More specifically, by setting up a nitrogen sealing unit 4, when the oil pressure is continuously discharged to a safe value, the gas valve 403 opens, and the high-pressure nitrogen valve 403 group inside the nitrogen tank storage box 401 delivers nitrogen to the cooling oil circuit through the gas delivery pipe 402. Then, high-purity nitrogen is input into the insulating oil tank 101 through each external pressure relief pipe 207 and internal pressure relief pipe 104 to stir and cool down rapidly, and replace oxygen to below the limit oxygen concentration, thereby blocking the combustion chain and achieving dual protection of oil discharge and nitrogen delivery.

[0030] like Figure 2 , Figure 8 , Figure 9 As shown, specifically, horizontally arranged pressure relief boxes 107 are fixedly installed on both sides of the top of the insulating oil tank 101. Multiple pressure relief holes 108 communicating with the interior of the insulating oil tank 101 are opened on one side of each pressure relief box 107. A venting and explosion-proof membrane 109 is fixedly installed inside each pressure relief hole 108. A rectifier box 110 is fixedly installed inside the pressure relief box 107. All pressure relief holes 108 are connected to the rectifier box 110. Multiple evenly distributed first pressure relief valves 11 are fixedly installed on one side of the rectifier box 110. 1. A partition 112 is fixedly installed inside the internal pressure relief pipe 104. A compressed air bag 113 is fixedly installed on the side of the partition 112 away from the first pressure relief valve 111. One end of the first pressure relief valve 111 passes through the partition 112 and is connected to the inside of the compressed air bag 113. An end cap 114 is installed on the side of the pressure relief box 107 away from the insulating oil tank 101. Multiple self-locking buckles 115 are provided on the top and bottom of the pressure relief box 107. The end cap 114 is fixedly assembled with the pressure relief box 107 through the self-locking buckles 115.

[0031] More specifically, by setting the first pressure relief valve 111, after a large amount of nitrogen is injected into the insulating oil tank 101, the internal air pressure will gradually increase. When the air pressure exceeds the safety threshold, the venting and explosion-proof membranes 109 on both sides will gradually rupture, thereby transporting the mixed gas including nitrogen through the pressure relief hole 108 to the rectifier bar box 110. Then, under the action of air pressure, the first pressure relief valve 111 is opened to supply air to the compression bladder 113 until the compression bladder 113 expands and pushes open the self-locking buckle 115, popping out the end cover 114 and continuing to expand. This provides fault tolerance for the control of nitrogen supply, so as to prevent excessive nitrogen supply from causing excessive air pressure inside the insulating oil tank 101 and causing secondary damage.

[0032] like Figure 5 As shown, specifically, the circulation unit 3 includes a return oil tank 301, an oil inlet pipe 203 and a return oil tee pipe 209, all of which are connected to the return oil tank 301. A second pressure relief valve 302 is provided on the top of the return oil tank 301.

[0033] More specifically, by setting a second pressure relief valve 302, a portion of the nitrogen gas delivered by the nitrogen sealing unit 4 is transported to the return oil tank 301 through the flow channel and the return oil tee pipe 209. This also cools down the insulating oil mixed together in the return oil tank 301 and isolates it from oxygen. When the gas pressure in the return oil tank 301 is too high, the second pressure relief valve 302 opens and releases pressure to prevent the return oil tank 301 from rupturing and causing oil leakage.

[0034] In summary: Before use: assemble the cooling power unit 2, circulation unit 3, and nitrogen sealing unit 4 together with the transformer body 1 using fasteners and bases, so that multiple Q-shaped tubes 206 are inserted into the grid gaps of each corrugated heat sink 102 and tightly attached to the heat exchange groove 103, while multiple external pressure relief pipes 207 are inserted into the interior of each internal pressure relief pipe 104, so that the sealing sleeve 210 and the sealing groove 106 are interference-fitted to complete the seal; During normal use: The high-pressure nitrogen cylinder group is stored inside the nitrogen cylinder storage tank 401. A small integrated air conditioning unit 404 cools and ventilates the nitrogen cylinder storage tank 401, providing a suitable environment for nitrogen storage and ensuring normal operation in emergencies. Simultaneously, the cooling oil pump 202 draws oil of the same type as the insulating oil in the insulating oil tank 101 from the circulation unit 3 as a heat exchange medium. This oil is transported through the oil inlet pipe 203. The cooling oil passes through the zigzag section 212 on the oil inlet pipe 203, flowing through the interior of the nitrogen cylinder storage tank 401, thereby cooling the nitrogen. Cooling oil is cooled down. After the cooling oil pump 202 draws the cooling oil, it is transported through the oil delivery tee 204 to one of the flow channels inside the two oil delivery pipes 205, then into the interior of the Q-shaped pipe 206, and then through the other end to the second flow channel. Finally, it is transported through the return oil tee 209 to the return oil tank 301, completing the cycle. The cooling oil exchanges heat with the insulating oil inside the insulating oil tank 101 through the Q-shaped pipe 206 and the side wall of the heat exchange tank 103. Combined with the natural heat dissipation of the corrugated heat sink 102, it provides sufficient cooling for the insulating oil to prevent heat accumulation. In an emergency: When an abnormality or damage occurs inside the transformer body 1, the temperature rises sharply, and the insulating oil and gas expand due to heat. At this time, the cooling oil pump 202 stops circulating, and the internal safety valve group of the transformer body 1 begins to automatically depressurize. When the automatic depressurization efficiency is insufficient, the internal pressure of the insulating oil tank 101 continues to rise until the first oil-draining explosion-proof membrane 105 and the second oil-draining explosion-proof membrane 208 at each location rupture in sequence. The oil and gas are then transported through the internal pressure relief pipe 104 and the external pressure relief pipe 207 to the Q-shaped pipe 206, and directly follow the circulation route. The oil is discharged into the circulation unit 3 for efficient pressure relief, effectively preventing the transformer body 1 from rupturing and exploding. When the oil pressure is continuously discharged to a safe value, the gas valve 403 is opened. The high-pressure nitrogen valve 403 group inside the nitrogen tank storage box 401 delivers nitrogen to the cooling oil circuit through the gas delivery pipe 402. Then, high-purity nitrogen is introduced into the insulating oil tank 101 through each external pressure relief pipe 207 and internal pressure relief pipe 104 to stir and cool down rapidly, and replace oxygen to below the limit oxygen concentration, interrupting the combustion chain and achieving dual protection of oil discharge and nitrogen delivery. Subsequent processing: After a large amount of nitrogen is injected into the insulating oil tank 101, its internal pressure will gradually increase. When the pressure exceeds the safety threshold, the venting and explosion-proof membranes 109 on both sides will gradually rupture, thereby conveying the mixed gas including nitrogen through the pressure relief hole 108 to the rectifier bar box 110. Then, under the action of the pressure, the first pressure relief valve 111 is opened, and gas is supplied to the compression bladder 113 until the compression bladder 113 expands and pushes open the self-locking buckle 115, popping out the end cap 114 and continuing to expand, releasing nitrogen. The control of the gas delivery provides fault tolerance to prevent excessive nitrogen delivery from causing excessive gas pressure inside the insulating oil tank 101 and causing secondary damage. A portion of the nitrogen delivered by the nitrogen sealing unit 4 will be delivered to the return oil tank 301 through the flow channel and the return oil tee 209. This will also cool down the insulating oil mixed together in the return oil tank 301 and isolate it from oxygen. When the gas pressure in the return oil tank 301 is too high, the second pressure relief valve 302 will open and release pressure to prevent the return oil tank 301 from rupturing and causing oil leakage.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An explosion-proof oil-immersed transformer with a belt processing module, characterized by, The transformer body (1) includes an explosion-proof treatment module. The transformer body (1) includes an insulating oil tank (101). Corrugated heat sinks (102) are fixedly installed on all four sides of the insulating oil tank (101). Multiple heat exchange slots (103) are opened on both sides of the insulating oil tank (101). Multiple horizontally arranged internal pressure relief pipes (104) connected to the insulating oil tank (101) are fixedly installed inside the heat exchange slots (103). A first oil leakage explosion-proof membrane (105) is fixedly installed inside the internal pressure relief pipes (104). The explosion-proof processing module includes a cooling power unit (2) and a circulation unit (3). The cooling power unit (2) includes an oil pump box (201). A cooling oil pump (202) is fixedly installed inside the oil pump box (201). An oil inlet pipe (203) connected to the circulation unit (3) is fixedly installed at the input end of the cooling oil pump (202). An oil delivery tee pipe (204) is fixedly installed at the output end of the cooling oil pump (202). Oil delivery pipes (205) are fixedly installed at both ends of the oil delivery tee pipe (204). The oil delivery pipe (205) has two flow channels inside. The two ends of the oil delivery tee pipe (204) are respectively connected to two of them. The flow channels are connected. Multiple Q-shaped tubes (206) are fixedly installed on the top of each oil pipe (205). The two ends of each Q-shaped tube (206) are connected to two flow channels respectively. Multiple external pressure relief tubes (207) are fixedly installed on one side of each Q-shaped tube (206). A second oil leakage explosion-proof membrane (208) is fixedly installed inside each external pressure relief tube (207). The other end of each oil pipe (205) is fixedly installed with the same return oil tee pipe (209). Two ends of the return oil tee pipe (209) are connected to the remaining two flow channels respectively. The other end of the return oil tee pipe (209) is connected to the circulation unit (3).

2. The oil-immersed transformer of claim 1, wherein, The explosion-proof treatment module also includes a nitrogen sealing unit (4), which includes a nitrogen tank storage box (401). The nitrogen tank storage box (401) is equipped with a high-pressure nitrogen tank group. A gas supply pipe (402) is fixedly installed on one side of the nitrogen tank storage box (401). One end of the gas supply pipe (402) extends into the interior of the nitrogen tank storage box (401) and is connected to the high-pressure nitrogen tank. A gas valve (403) is fixedly installed on one end of the oil supply tee pipe (204), and the other end of the gas supply pipe (402) is connected to one end of the oil supply tee pipe (204).

3. The oil-immersed transformer of claim 2, wherein A small air conditioning unit (404) is fixedly installed on one side of the nitrogen tank storage box (401), and a canopy (405) is fixedly installed on one side of the top of the nitrogen tank storage box (401). The canopy (405) is located above the small air conditioning unit (404).

4. The oil-immersed transformer of claim 2, wherein The oil inlet pipe (203) is provided with a zigzag pipe section (212), which extends into the interior of the nitrogen tank storage box (401).

5. The oil immersed transformer of claim 1, wherein, The circulation unit (3) includes a return oil tank (301), the oil inlet pipe (203) and the return oil tee pipe (209) are both connected to the return oil tank (301), and a second pressure relief valve (302) is provided on the top of the return oil tank (301).

6. The oil immersed transformer of claim 1, wherein, The outer end of the inner pressure relief pipe (104) and the heat exchange tank (103) are provided with sealing grooves (106). The connection between the outer pressure relief pipe (207) and the Q-shaped pipe (206) is fixedly fitted with sealing sleeves (210) that are compatible with the sealing grooves (106). The inner ring of the Q-shaped pipe (206) is fixedly installed with reinforcing frames (211).

7. The oil immersed transformer of claim 1, wherein, Both sides of the top of the insulating oil tank (101) are fixedly installed with horizontally arranged pressure relief strip boxes (107). One side of the pressure relief strip box (107) is provided with multiple pressure relief holes (108) that communicate with the inside of the insulating oil tank (101). The inside of each pressure relief hole (108) is fixedly installed with a venting explosion-proof membrane (109). The inside of the pressure relief strip box (107) is fixedly installed with a rectifier strip box (110). The pressure relief holes (108) are all connected to the rectifier strip box (110). One side of the rectifier strip box (110) is fixedly installed with multiple evenly distributed first pressure relief valves (111).

8. The oil-immersed transformer of claim 7, wherein A partition (112) is fixedly installed inside the internal pressure relief pipe (104). A compression air bag (113) is fixedly installed on the side of the partition (112) away from the first pressure relief valve (111). One end of the first pressure relief valve (111) passes through the partition (112) and is connected to the inside of the compression air bag (113). An end cap (114) is installed on the side of the pressure relief box (107) away from the insulating oil tank (101). Multiple self-locking buckles (115) are provided on the top and bottom of the pressure relief box (107). The end cap (114) is fixedly assembled with the pressure relief box (107) through the self-locking buckles (115).

Images