Explosion-proof oil tank and oil-filled electrical equipment

Abstract

The utility model relates to an anti-explosion oil tank and oil-filled electrical equipment, and is applied to the field of oil-filled electrical equipment. The oil tank comprises a tank body and at least one pressure relief assembly installed on the tank body, a cavity used for containing oil is formed in the tank body, and the volume of the cavity can be increased along with increase of the pressure in the cavity; the pressure relief assembly comprises a shell and an explosion-proof membrane, the shell is installed on the box body and internally provided with a pressure relief channel used for communicating the cavity with the outside, and the explosion-proof membrane is installed on the shell, can block the pressure relief channel and is broken when the pressure in the cavity exceeds the preset pressure. According to the anti-explosion oil tank, on one hand, the pressure in the oil tank is released to a certain degree by changing the volume of the cavity of the anti-explosion oil tank, on the other hand, the pressure relief assemblies are connected to the tank body, when the air pressure in the cavity exceeds the preset air pressure, the anti-explosion film is broken to open the pressure relief channel, and therefore an oil-gas mixture in the cavity is rapidly discharged; rapid pressure relief is achieved by changing the volume of the cavity and opening the pressure relief channel.

Description

Technical Field

[0001] This application relates to the technical field of oil-filled electrical equipment, and particularly to an explosion-proof fuel tank and an oil-filled electrical equipment. Background Art

[0002] The converter transformer fuel tank contains several tons or even hundreds of tons of transformer oil. When an arc discharge occurs inside the converter transformer, the rapid energy conversion between the arc and the oil will cause the temperature near the arc to rise rapidly. The arc energy causes the transformer oil to be heated and evaporated, and the vapor is cracked into small particles and combustible gases such as hydrogen, methane, ethane, and ethylene. The cracked gas forms a plasma.

[0003] Due to the very concentrated local phase change (the pressure of saturated vapor at high temperature), the transformer oil prevents the bubbles from expanding, thus maintaining the pressure balance between the gas and the liquid. The pressure of the bubbles around the arc increases rapidly. The pressure difference between the gas and the surrounding liquid generates a pressure wave that propagates outward from the arc position at a speed close to the speed of sound in the oil. When the pressure wave passes, the local pressure rises rapidly, and the local pressure level can reach the megapascal level.

[0004] If the transformer fuel tank cannot withstand such a huge pressure, a large amount of oil and gas will be ejected from the weak positions of the transformer fuel tank (such as the tank edge, the welded seams of the fuel tank, etc.). This may cause the mixture of combustible gas and oil to come into contact with the oxygen in the air, leading to combustion. If the combustion spreads to the inside of the transformer fuel tank, it is extremely likely to cause an explosion. Summary of the Utility Model

[0005] Based on this, in view of the problem that the transformer fuel tank cannot withstand the pressure generated by internal arc faults and causes combustion and explosion, it is necessary to provide an explosion-proof fuel tank and an oil-filled electrical equipment.

[0006] In the first aspect, this application provides an explosion-proof fuel tank, adopting the following technical solution:

[0007] An explosion-proof fuel tank includes a box body and at least one pressure relief component installed on the box body. There is a chamber for loading oil in the box body, and the volume of the chamber can increase with the increase of the pressure in the chamber; the pressure relief component includes a housing and an explosion-proof membrane. The housing is installed on the box body and internally provided with a pressure relief channel for communicating the chamber with the outside. The explosion-proof membrane is installed on the housing and can block the pressure relief channel and rupture when the pressure in the chamber exceeds a preset pressure.

[0008] By adopting the above technical solutions, on the one hand, the pressure in the fuel tank is released to a certain extent by changing the volume of its own chamber, and on the other hand, a plurality of pressure relief components are connected to the box body. When the internal air pressure in the chamber exceeds the preset air pressure, the explosion-proof membrane ruptures to open the pressure relief channel, so as to quickly discharge the oil-gas mixture in the chamber. This application realizes rapid pressure relief by changing the volume of the chamber and opening the pressure relief channel, thereby avoiding the situation that the fuel tank explodes due to being unable to withstand the internal pressure.

[0009] In one embodiment, the pressure relief component further includes a detection member installed on the housing, and the detection member is used to detect the opening and closing state of the explosion-proof membrane.

[0010] By adopting the above technical solutions, the opening and closing state of the explosion-proof membrane is detected in real time by means of the detection member, so that the operator can timely know the opening and closing state of the explosion-proof membrane and take corresponding explosion-proof measures.

[0011] In one embodiment, when the pressure in the chamber exceeds the preset pressure, the opening degree of the pressure relief channel is at least 95%.

[0012] By adopting the above technical solutions, when the pressure in the chamber exceeds the preset air pressure, the opening degree of the pressure relief channel is expanded to more than 95%, so that the gas and oil generated during the occurrence of an arcing fault can be quickly released to the outside through the large-opening pressure relief channel to ensure the pressure relief rate.

[0013] In one embodiment, the explosion-proof fuel tank further includes an oil-gas separator, the pressure relief component is connected between the box body and the oil-gas separator, and the oil-gas separator is used to collect, deposit and separate the oil-gas mixture.

[0014] By adopting the above technical solutions, an oil-gas separator is installed after the pressure relief component to collect, deposit and separate the discharged oil-gas mixture, so as to reduce the pollution of the surrounding environment by the oil and gas.

[0015] In one embodiment, the oil-gas separator is provided with an exhaust port and an oil drain port arranged at intervals. The oil drain port is closer to the ground than the exhaust port. The exhaust port is used for discharging gas, and the oil drain port is used for discharging oil.

[0016] By adopting the above technical solutions, setting the exhaust port above the oil drain port can realize the sedimentation treatment of the oil by means of gravity, so as to directly separate the gas from the oil. In addition, setting the oil drain port below the liquid drain port can also facilitate the operator to directly discharge and collect the oil by means of gravity below the oil-gas separator, further simplifying the subsequent operation.

[0017] In one embodiment, the oil-gas separator further includes a filter element disposed between the oil drain port and the exhaust port to prevent oil from flowing toward the exhaust port.

[0018] By adopting the above technical solution, a filter element is provided between the oil drain port and the exhaust port, which can effectively prevent oil from being discharged into the external air through the exhaust port along with the gas, thereby reducing the impact on the external environment.

[0019] Second, the present application provides an oil-filled electrical equipment, adopting the following technical solution:

[0020] An oil-filled electrical equipment includes an oil conservator, the above-mentioned explosion-proof oil tank and a connecting pipe oil circuit. The oil conservator is used for storing oil, the explosion-proof oil tank is connected to the oil conservator, and the connecting pipe oil circuit is connected between the oil conservator and the explosion-proof oil tank to convey the oil in the oil conservator to the explosion-proof oil tank.

[0021] By adopting the above technical solution, the explosion-proof oil tank is connected to the oil conservator through the connecting pipe oil circuit, so as to facilitate real-time refueling of the explosion-proof oil tank through the oil conservator.

[0022] In one embodiment, the oil-filled electrical equipment further includes a cut-off valve, which can be installed on the connecting pipe oil circuit and connected between the box body and the oil conservator to control the on-off of the oil circuit between the oil conservator and the explosion-proof oil tank.

[0023] By adopting the above technical solution, by setting a cut-off valve on the connecting pipe oil circuit to control the on-off of the connecting pipe oil circuit, when a large pressure is generated due to an internal fault in the explosion-proof oil tank, especially when the pressure in the chamber exceeds the preset pressure, the cut-off valve cuts off the connecting pipe oil circuit, so that the oil conservator no longer refuels the oil tank, to avoid expanding the risk of explosion.

[0024] In one embodiment, the oil-filled electrical equipment further includes a power supply switch, which is used to electrically connect the explosion-proof oil tank and the cut-off valve to an external power source.

[0025] By adopting the above technical solution, the regulation and control of the on-off state of the explosion-proof oil tank are realized by means of the setting of the power supply switch, so that the operator can timely cut off the power supply to the explosion-proof oil tank when an internal fault occurs, and no longer supply energy to the internal arcing fault, so that the fault no longer continues.

[0026] In one embodiment, the oil-filled electrical equipment further includes a controller, which is electrically connected to the explosion-proof oil tank, the cut-off valve and the power supply switch respectively.

[0027] By adopting the above technical solution, the centralized regulation and control among the explosion-proof oil tank, the cut-off valve and the power supply switch are realized by means of the setting of the controller.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. For the above-mentioned explosion-proof fuel tank, on the one hand, the pressure inside the fuel tank is released to a certain extent by changing the volume of its own chamber. On the other hand, a plurality of pressure relief components are connected to the box body. When the internal air pressure in the chamber exceeds the preset air pressure, the explosion-proof membrane ruptures to open the pressure relief channel, so as to quickly discharge the oil-gas mixture in the chamber. The present application realizes rapid pressure relief by changing the chamber volume and opening the pressure relief channel, thereby avoiding the explosion of the fuel tank due to its inability to withstand the internal pressure;

[0030] 2. By means of setting a cut-off valve on the connecting pipe oil circuit to control the on-off of the connecting pipe oil circuit, when an internal fault occurs in the explosion-proof fuel tank and generates a large pressure, especially when the pressure in the chamber exceeds the preset pressure, the cut-off valve cuts off the connecting pipe oil circuit, so that the oil storage tank no longer supplies oil to the fuel tank, in order to avoid expanding the risk of combustion and explosion;

[0031] 3. By means of setting a power supply switch, the on-off state of the explosion-proof fuel tank is regulated, so that the operator can cut off the power supply to the explosion-proof fuel tank in time when an internal fault occurs, and no longer supply energy to the internal arcing fault, so that the fault no longer continues. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of an oil-filled electrical equipment in an embodiment of the present application.

[0033] Figure 2 It is a partial cross-sectional view of the box body in an embodiment of the present application.

[0034] Figure 3 It is a partial cross-sectional view of the pressure relief component in an embodiment of the present application.

[0035] Figure 4 It is a partial cross-sectional view of the oil-gas separator in an embodiment of the present application.

[0036] Explanation of the reference numerals in the drawings:

[0037] 1. Explosion-proof fuel tank; 11. Box body; 111. Chamber; 12. Pressure relief component; 121. Shell; 1211. Pressure relief channel; 122. Explosion-proof membrane; 123. Detection component; 13. Oil-gas separator; 131. Filter component; 132. Exhaust port; 133. Oil drain port; 2. Oil storage tank; 3. Cut-off valve; 4. Connecting pipe oil circuit. Detailed Embodiments

[0038] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0040] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0041] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "couple", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" or "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0044] A converter transformer refers to a power transformer connected between a converter bridge and an AC system. The converter transformer is used to connect the converter bridge to the AC bus and provides a three-phase commutation voltage with an isolated neutral point for the converter bridge. The converter transformer and the converter bridge are the main components of the conversion unit.

[0045] The tank of the converter transformer contains several tons or even hundreds of tons of transformer oil and belongs to oil-filled electrical equipment. When an arc discharge occurs inside the converter transformer, the rapid energy conversion between the arc and the oil will cause the temperature near the arc to rise rapidly. The arc energy causes the transformer oil to be heated and evaporated, and the vapor is cracked into small particles and combustible gases such as hydrogen, methane, ethane and ethylene, etc. The cracked gas forms a plasma.

[0046] Due to the very concentrated local phase change (the pressure of saturated steam at high temperature), the transformer oil prevents the bubbles from expanding, thus maintaining the pressure balance between the gas and the liquid. The pressure of the bubbles around the arc increases rapidly. The pressure difference between the gas and the surrounding liquid generates a pressure wave that propagates outward from the arc position, and the speed is close to the speed of sound in the oil. When the pressure wave passes, the local pressure rises rapidly, and the local pressure level can reach the megapascal level.

[0047] If the transformer tank cannot withstand such a huge pressure, a large amount of oil and gas will be ejected from the weak positions of the transformer tank (such as the tank rim, the welded seams of the tank, etc.). In most cases, it will cause the mixture of combustible gas and oil to come into contact with the oxygen in the air, triggering combustion. If the combustion spreads to the inside of the transformer tank, it is extremely likely to cause an explosion.

[0048] During normal operation, the oil tank of the converter transformer needs to withstand the oil pressure brought by the transformer oil. When designing the oil tank, the oil tank should be able to withstand a pressure 35 kPa higher than that during normal operation; if the converter transformer is equipped with a pressure relief device, the pressure that the oil tank can withstand should be at least 10 kPa higher than the operating pressure of the pressure relief device. Generally, according to the requirements of the user agreement, the oil tank is required to be able to withstand a pressure of 0.06 - 0.12 MPa. When an internal arcing fault occurs in the oil tank of the converter transformer, the pressure that the oil tank bears can reach more than a dozen MPa, far higher than the designed withstand pressure of the oil tank of the converter transformer, thus causing an explosion and affecting the safety of use of the converter transformer.

[0049] Therefore, the present application aims to provide an explosion-proof oil tank capable of quickly releasing the pressure generated in the internal fault state and an oil-filled electrical equipment applying the explosion-proof oil tank.

[0050] The following Figures 1-4 will further elaborate on the embodiments of the present application in detail.

[0051] Refer to Figure 1 As shown, an embodiment of the present application provides an oil-filled electrical equipment. In the embodiment of the present application, the oil-filled electrical equipment includes but is not limited to a converter transformer, and only the converter transformer is taken as an example for introduction. The oil-filled electrical equipment includes an oil conservator 2 and an explosion-proof oil tank 1. The oil conservator 2 is used for storing oil, and the oil conservator 2 is connected to the explosion-proof oil tank 1 through a connecting pipe oil circuit 4 for refilling the explosion-proof oil tank 1. When the oil-filled electrical equipment is a converter transformer, the oil in the oil conservator 2 and the explosion-proof oil tank 1 is transformer oil.

[0052] In some embodiments, the oil-filled electrical equipment further includes a shut-off valve 3 installed on the connecting pipe oil circuit 4 through a flange joint. The shut-off valve 3 controls the on-off of the connecting pipe oil circuit 4 by opening and closing. When a large pressure is generated due to an internal fault in the explosion-proof oil tank 1, especially when the pressure in the chamber 111 exceeds the preset pressure, the shut-off valve 3 cuts off the connecting pipe oil circuit 4, so that the oil conservator 2 no longer refills the oil tank, to avoid expanding the risk of combustion and explosion.

[0053] In some other embodiments, the oil-filled electrical equipment further includes a power supply switch (not shown) and a controller (not shown). Among them, the power supply switch can electrically connect the explosion-proof oil tank 1 and the shut-off valve 3 to an external power supply to achieve power supply and on-off control. In the embodiment of the present application, the controller may specifically be a single-chip microcomputer or a PLC control device, and the above-mentioned explosion-proof oil tank 1, shut-off valve 3, and power supply switch are all electrically connected to the controller.

[0054] Combined with Figure 2As shown in the figure, an embodiment of the present application further provides an explosion-proof fuel tank 1, which includes a tank body 11, and a chamber 111 for loading and storing oil is provided inside the tank body 11. In the embodiment of the present application, the tank body 11 is formed by welding metal plates. In particular, the setting of rib positions should be avoided as much as possible on the tank body 11 of the present application, so that the tank body 11 has a certain flexibility when a pressure is generated due to an internal failure.

[0055] When an internal arcing fault occurs in an oil-filled electrical equipment, a large amount of oil is cracked and gasified to generate a large amount of high-temperature gas, causing the internal pressure of the chamber 111 to increase suddenly. The tank body 11 can generate a corresponding deformation with the change of pressure. At this time, the deformation specifically refers to elastic deformation, so that the volume of the chamber 111 increases with the increase of pressure, thereby releasing the pressure inside the tank body 11 to a certain extent.

[0056] Furthermore, when the pressure in the chamber 111 exceeds the preset pressure, the tank body 11 of the explosion-proof fuel tank 1 can further deform. At this time, the deformation specifically refers to plastic deformation that further occurs on the basis of the elastic deformation of the tank body 11, so as to further quickly open the pressure release space, quickly reduce the pressure inside the tank body 11, and avoid the situation that the tank body 11 bursts due to being unable to withstand the pressure, resulting in the leakage of a large amount of oil and gas.

[0057] Combined Figure 2 and Figure 3 As shown in the figure, in some other embodiments, the explosion-proof fuel tank 1 further includes at least one pressure relief component 12, and a plurality of pressure relief components 12 are installed on the tank body 11 at intervals. In the embodiment of the present application, the pressure relief component 12 includes a housing 121 and an explosion-proof membrane 122. The housing 121 is connected to the tank body 11 through a flange interface. A pressure relief channel 1211 for connecting the chamber 111 to the outside is formed inside the housing 121. The explosion-proof membrane 122 is installed in the housing 121 and can block the pressure relief channel 1211, so that the explosion-proof fuel tank 1 is in a closed state when the oil-filled electrical equipment is operating normally.

[0058] When an internal arcing fault occurs inside the tank body 11, the pressure in the chamber 111 increases suddenly. When the pressure is higher than the preset pressure, the explosion-proof membrane 122 of the pressure relief component 12 ruptures, and the opening degree reaches more than 95%, so as to discharge a large amount of oil and high-temperature gas generated by the arcing fault through the pressure relief channel from the chamber 111, so as to cooperate with the deformation of the tank body 11 to complete further pressure relief, accelerate the overall pressure relief speed, and improve the pressure-bearing and pressure-relieving capabilities of the explosion-proof fuel tank 1.

[0059] In the embodiments of the present application, when an arcing fault occurs inside the box body 11, the opening degree of the explosion-proof membrane 122 can specifically be 95%, 96%, 97%, 98%, 99% or 100%. The specific opening degree can be adaptively changed according to the pressure change inside the box body 11, and the present application does not make specific limitations here.

[0060] Furthermore, in some embodiments, the pressure relief component 12 further includes a detection member 123 installed on the housing 121. The detection member 123 is used to detect the opening and closing state of the explosion-proof membrane 122. In the embodiments of the present application, the detection member 123 is electrically connected to the above-mentioned cutoff valve 3 and power supply switch through a controller to achieve the power supply and oil supply control of the overall charging electrical equipment. Specifically, the detection member 123 includes a normally closed node electrically connected to the explosion-proof membrane 122. When the explosion-proof membrane 122 ruptures, the signal of the normally closed node is disconnected, so as to obtain the opening and closing state information of the explosion-proof membrane 122.

[0061] When the air pressure in the chamber 111 exceeds the preset air pressure, the explosion-proof membrane 122 ruptures. At the same time, the signal of the normally closed node of the detection member 123 is disconnected and a trip signal is triggered. The power supply switch is immediately closed, so that the overall charging electrical equipment is in a power-off state and no longer provides energy for the arcing fault inside the box body 11, so that the fault no longer continues, thus ensuring the safety of the converter transformer and surrounding electrical equipment.

[0062] Meanwhile, after receiving the trip signal through the controller, the cutoff valve 3 between the oil conservator 2 and the explosion-proof oil tank 1 acts and cuts off the connecting pipe oil circuit 4, so that the oil conservator 2 no longer replenishes oil to the explosion-proof oil tank 1, so as to avoid further expanding the risk of combustion and explosion, and further improve the use safety of the charging electrical equipment.

[0063] Continue to refer to Figure 1 and Figure 4 As shown, in some embodiments, the explosion-proof oil tank 1 further includes an oil-gas separator 13 connected to the pressure relief component 12 through a flange interface. The inlet end and the outlet end of the pressure relief component 12 are respectively connected to the box body 11 and the oil-gas separator 13 through flange interfaces, so as to transport a large amount of gas and oil generated by the arcing fault inside the box body 11 to the oil-gas separator 13 for separation operation after pressure relief through the pressure relief component 12.

[0064] Specifically, the oil-gas separator 13 is provided with an exhaust port 132 and an oil drain port 133 arranged at intervals. An exhaust pipeline and an oil drain valve are respectively arranged on the oil-gas separator 13 corresponding to the exhaust port 132 and the oil drain port 133. In the embodiment of the present application, the oil drain port 133 is closer to the ground than the exhaust port 132. After the oil-gas separator 13 realizes pressure release and oil-gas separation, the gas is discharged through the exhaust port 132 to a safe location, and the oil deposits at the bottom of the oil-gas separator 13 and can be led to a safe location through the lower oil drain valve for controlled discharge. In the embodiment of the present application, the selection of the safe location can be determined according to the actual situation, as long as it is convenient for discharge, and it is not easy to cause pollution to the environment after discharge, and it is not easy to generate combustion and explosion phenomena when contacting with air.

[0065] In addition, in some other embodiments, the oil-gas separator 13 further includes a filter element 131. Specifically, the filter element 131 can be a filter membrane installed in the housing of the oil-gas separator 13. The filter membrane divides the interior of the housing into a gas storage area and an oil storage area. Among them, the oil storage area is located below the gas storage area. The above-mentioned exhaust port 132 communicates with the top of the gas storage area, and the oil drain port 133 communicates with the bottom of the oil storage area. The surface of the filter membrane is densely covered with tiny pores, and only gas can pass through these pores, so as to prevent the oil liquid from entering the gas storage area through the pores and being discharged through the exhaust port 132, so as to ensure the purity of the discharged gas.

[0066] Furthermore, in order to ensure the sealing performance of each connection joint and connection pipeline during the pressure relief process, in the embodiment of the present application, a sealing structure is correspondingly provided for each flange joint. Specifically, the sealing structure can be a sealing ring installed between two adjacent flange plates. When the two flange plates are locked and fixed by bolts, the sealing ring is pressed tightly between the two flange plates to improve the overall sealing performance of the connection joint and the connection pipeline, so as to avoid the occurrence of combustion and explosion due to the accidental leakage of a large amount of gas and oil liquid gushing out from the box body 11.

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0068] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An explosion-proof fuel tank, characterized in that, include: A box body having a chamber for containing oil, wherein the volume of the chamber can increase as the pressure in the chamber increases; and At least one pressure relief component, the pressure relief component includes a shell and an explosion-proof membrane, the shell is installed on the box body and has a built-in pressure relief channel for connecting the chamber to the outside world, the explosion-proof membrane is installed on the shell and can block the pressure relief channel, and ruptures when the pressure in the chamber exceeds a preset pressure.

2. The explosion-proof fuel tank according to claim 1, wherein, The pressure relief assembly further comprises a detection member installed on the housing, and the detection member is used to detect the opening and closing state of the explosion-proof membrane.

3. The explosion-proof fuel tank according to claim 1, wherein When the pressure in the chamber exceeds the preset pressure, the opening degree of the pressure relief channel is at least 95%.

4. The explosion-proof fuel tank according to claim 1, characterized in that, The explosion-proof oil tank further comprises an oil-gas separator, the pressure relief assembly is connected between the tank body and the oil-gas separator, and the oil-gas separator is used to collect, deposit and separate the oil-gas mixture.

5. The explosion-proof fuel tank according to claim 4, wherein The oil-gas separator is provided with an exhaust port and an oil drain port which are arranged at intervals. The oil drain port is closer to the ground than the exhaust port. The exhaust port is used for exhausting gas, and the oil drain port is used for draining oil.

6. The explosion-proof fuel tank according to claim 5, wherein, The oil-gas separator further comprises a filter element, and the filter element is arranged between the oil discharge port and the exhaust port to prevent the oil from flowing toward the exhaust port.

7. An oil-filled electrical equipment, characterized in that, include: Oil storage tank, used to store oil; The explosion-proof oil tank according to any one of claims 1 to 6, connected to the oil storage cabinet; and The connecting pipe oil circuit is connected between the oil storage cabinet and the explosion-proof oil tank, so as to transport the oil in the oil storage cabinet to the explosion-proof oil tank.

8. The oil-filled electrical equipment according to claim 7, characterized in that, The oil-filled electrical equipment further comprises a shut-off valve, which can be installed in the connecting pipe oil circuit and connected between the box body and the oil storage cabinet to control the on-off of the oil circuit between the oil storage cabinet and the explosion-proof oil tank.

9. The oil-filled electrical equipment according to claim 8, characterized in that, The oil-filled electrical equipment further comprises a power supply switch, and the power supply switch is used to electrically connect the explosion-proof oil tank and the cut-off valve to an external power supply.

10. The oil-filled electrical equipment according to claim 9, characterized in that, The oil-filled electrical equipment further comprises a controller, which is electrically connected to the explosion-proof oil tank, the cut-off valve and the power switch respectively.

Images