Capsule type oil conservator for vehicle-mounted transformer and vehicle-mounted transformer

Abstract

The capsule type oil conservator comprises a conservator body, capsules and a floating ball oil level indicator, a plurality of oil storage chambers which are communicated with one another are arranged in the conservator body, the capsules are arranged at the tops of the oil storage chambers respectively, the bottoms of the capsules are tightly attached to the oil surfaces in the oil storage chambers, and the floating ball oil level indicator is arranged in the conservator body. The air inlet and the air outlet of each capsule are communicated with each other through a communicating pipe, the communicating pipe is communicated with the atmosphere so that the capsules can expand or contract under the action of oil pressure and atmospheric pressure, a floating ball of the floating ball oil level gauge is arranged in an oil storage chamber in a swinging mode so that the floating ball can float up and down along with changes of the oil level, and the floating ball abuts against the capsules in the oil storage chamber. According to the capsule type oil conservator for the vehicle-mounted transformer, the problem that the floating ball of the floating ball oil level indicator is pressed by the capsule to display the false oil level due to the fact that the capsule is too long and too heavy can be avoided, the shaking amplitude of oil in the vehicle running process is reduced, and therefore impact of oil shaking on the floating ball swing rod is reduced, and the problem that the floating ball swing rod is damaged is solved.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to a capsule-type oil storage cabinet for a vehicle-mounted transformer and a vehicle-mounted transformer. Background Art

[0002] The oil conservator is one of the main components of the transformer. Its function is to compensate for the volume expansion or contraction of the insulating oil due to temperature changes, and to ensure that the transformer box is always full of oil. Common oil conservators are open type, capsule type or diaphragm type and bellows type. The capsule type oil conservator is a sealed capsule that can withstand high pressure installed in the oil conservator. The capsule separates the insulating oil from the outside air. During operation, the capsule floats on the oil surface and inhales or exhausts air as the oil level rises or falls, thereby automatically balancing the pressure on both sides of the capsule to ensure that the transformer box is always full of insulating oil. At the same time, a float oil level gauge is installed in the capsule type oil conservator. The float of the float oil level gauge contacts the bottom of the capsule and floats with the expansion, contraction and oil level changes of the capsule, thereby measuring the oil level in the oil conservator.

[0003] In order to reduce the height of the vehicle-mounted transformer, the oil conservator is compressed and lengthened, and the ratio of the oil conservator length to the oil conservator height can reach more than 7:1. At this time, the capsule equipped is large in size and weight, which can easily press the float of the float oil level gauge and display a false oil level, causing the float oil level gauge to display inaccurately. In addition, during the driving of the vehicle, the oil in the oil conservator shakes and impacts the float swing rod of the float oil level gauge, which can easily cause damage to the float swing rod. Summary of the invention

[0004] The first object of the present invention is to provide a capsule oil storage cabinet for a vehicle-mounted transformer, so as to avoid the problem that a float oil level gauge displays a false oil level and the float swing rod is easily damaged.

[0005] A second object of the present invention is to provide a vehicle-mounted transformer comprising the above-mentioned capsule-type oil conservator for the vehicle-mounted transformer.

[0006] To achieve the above object, the present invention provides the following technical solutions: A capsule type oil storage cabinet for a vehicle-mounted transformer, comprising: A cabinet body, wherein a plurality of oil storage chambers interconnected with each other are arranged in the cabinet body; A capsule, wherein the capsule is disposed on the top of each oil storage chamber, the bottom of the capsule is in close contact with the oil surface in the oil storage chamber, the air inlet and outlet of each capsule are connected to each other through a connecting pipe, and the connecting pipe is connected to the atmosphere, so that the capsule expands or contracts under the action of oil pressure and atmospheric pressure; A ball float oil level gauge, wherein a float of the ball float oil level gauge is swingably arranged in an oil storage chamber so that the float can float up and down with the change of the oil level, and the float abuts against the capsule in the oil storage chamber.

[0007] In one embodiment of the present application, the length of at least one of the oil storage chambers is smaller than the length of the other oil storage chambers, and the float oil level gauge is arranged in the oil storage chamber with the smallest length.

[0008] In one embodiment of the present application, the ratio of the length to the height of the oil storage chamber in which the float oil level gauge is provided is 2:1.

[0009] In one embodiment of the present application, the inner cavity of the cabinet is divided into multiple oil storage chambers by a baffle plate, and two adjacent oil storage chambers are connected through the gap between the baffle plate and the inner cavity wall of the cabinet and / or the through holes on the baffle plate.

[0010] In one embodiment of the present application, a gap is set between the lower edge of the baffle plate and the bottom of the inner cavity of the cabinet, and between the upper edge of the baffle plate and the top of the inner cavity of the cabinet.

[0011] In one embodiment of the present application, one end of the connecting pipe is connected to the atmosphere through a desiccant.

[0012] In one embodiment of the present application, an exhaust mechanism is provided on the top of the cabinet, and the exhaust mechanism includes an exhaust pipe and an exhaust one-way valve. One end of the exhaust pipe is connected to one of the oil storage chambers, and the other end is provided with the exhaust one-way valve. The exhaust one-way valve is used to conduct one-way flow of the cabinet from the inside to the outside.

[0013] In one embodiment of the present application, a connecting pipe for communicating with a transformer box and an oil injection and discharge pipe for injecting and discharging oil are provided at the bottom of the cabinet, one end of the oil injection and discharge pipe is connected to an oil storage chamber, and a switch valve is provided at the other end.

[0014] In one embodiment of the present application, the bottom of the cabinet is provided with cabinet feet for supporting the cabinet, and the cabinet feet are provided with connection structures for detachably connecting with the box cover of the transformer box.

[0015] A vehicle-mounted transformer comprises the capsule-type oil storage cabinet for the vehicle-mounted transformer as described in any one of the above items.

[0016] It can be seen from the above technical scheme that the present invention discloses a capsule-type oil storage cabinet for a vehicle-mounted transformer, which includes a cabinet body, a capsule and a float oil level gauge, wherein a plurality of oil storage chambers interconnected are arranged in the cabinet body, a capsule is arranged on the top of each oil storage chamber, the bottom of the capsule is close to the oil surface in the oil storage chamber, the air inlet and outlet of each capsule are interconnected through a connecting pipe, and the connecting pipe is connected to the atmosphere, so that the capsule can expand or contract under the action of oil pressure and atmospheric pressure, and the float of the float oil level gauge is swingably arranged in an oil storage chamber, so that the float can float up and down with the change of oil level, and the float abuts against the capsule in the oil storage chamber.

[0017] The inner cavity of the capsule-type oil storage cabinet for the above-mentioned on-board transformer is divided into at least two oil storage chambers, and a capsule is arranged in each oil storage chamber, which can greatly shorten the length and weight of the capsule, thereby avoiding the problem of the float of the float oil level gauge being pressed by the capsule due to the capsule being too long and too heavy, thereby displaying a false oil level. At the same time, the inner cavity of the cabinet is divided into multiple oil storage chambers. Based on fluid-solid coupling mechanics, the partition structure between the oil storage chambers can reduce the oil shaking amplitude in the oil storage cabinet during vehicle operation, thereby reducing the impact of oil shaking on the float swing arm of the float oil level gauge, and reducing the problem of damage to the float swing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of a capsule-type oil storage cabinet for a vehicle-mounted transformer provided in an embodiment of the present invention; Figure 2 for Figure 1 A-direction sectional view; Figure 3 A schematic structural diagram of a baffle plate of a capsule-type oil conservator for a vehicle-mounted transformer provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of a flow-blocking grid of a capsule-type oil conservator for a vehicle-mounted transformer provided in an embodiment of the present invention.

[0020] In the figure: 1 is a cabinet body; 101 is a left oil storage chamber; 102 is a right oil storage chamber; 2 and 3 are capsules; 4 is a connecting pipe; 5 is a float oil level gauge; 501 is a float; 502 is a float swing rod; 6 is a baffle plate; 601 is a through hole; 6' is a baffle grid; 7 is a desiccant; 8 is an exhaust structure; 801 is an exhaust pipe; 802 is an exhaust check valve; 9 is a connecting pipe; 10 is an oil filling and discharge pipe; 11 is a cabinet foot; 12 and 13 are gaps. DETAILED DESCRIPTION

[0021] One of the cores of the present invention is to provide a capsule oil conservator for a vehicle-mounted transformer. The structural design of the capsule oil conservator for a vehicle-mounted transformer can avoid the problem that a float oil level gauge displays a false oil level and a float swing rod is easily damaged.

[0022] Another core of the present invention is to provide a vehicle-mounted transformer including the above-mentioned capsule-type oil storage cabinet for the vehicle-mounted transformer.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 , Figure 1 This is a structural schematic diagram of a capsule-type oil conservator for a vehicle-mounted transformer provided in an embodiment of the present invention.

[0025] The embodiment of the present invention discloses a capsule-type oil conservator for a vehicle-mounted transformer. The capsule-type oil conservator for a vehicle-mounted transformer comprises a cabinet body 1, a capsule and a float oil level gauge 5.

[0026] Among them, a plurality of interconnected oil storage chambers are arranged in the cabinet 1, that is, a partition or a grid is arranged in the inner cavity of the cabinet 1 to divide the inner cavity of the cabinet 1 into a plurality of oil storage chambers, and the number of the oil storage chambers is at least two. When the partition or the grid is arranged, it is necessary to ensure that the oil storage chambers are always connected to ensure that the oil levels in the oil storage chambers are flush. Figure 1 The X direction is the length direction of the cabinet 1, and the Y direction is the height direction of the cabinet 1. The oil storage chambers are arranged in sequence along the length direction of the cabinet 1, that is, the X direction. The lengths of the oil storage chambers can be the same, or the length of at least one oil storage chamber can be smaller than the lengths of other oil storage chambers as needed.

[0027] In order to ensure that the pressure in each oil storage chamber is the same, each oil storage chamber is interconnected, and a capsule is arranged on the top of each oil storage chamber. The size of the capsule is adapted to the size of the oil storage chamber, so that the capsule fills the space above the oil level in the oil storage chamber as much as possible, and the bottom of the capsule is close to the oil level in the oil storage chamber. The air inlet and outlet of each capsule are interconnected through a connecting pipe 4, and the connecting pipe 4 is connected to the atmosphere, so that the capsule can expand or contract under the action of oil pressure and atmospheric pressure, and the oil is isolated from the external environment through the capsule to prevent aging and moisture of the oil. That is, when the oil level in the inner cavity of the cabinet 1 rises, the oil level rises, the capsule is squeezed by the oil and shrinks, and the gas inside the capsule is discharged through the connecting pipe 4. When the oil level in the inner cavity of the cabinet 1 decreases, the oil level drops, and the capsule absorbs gas through the connecting pipe 4 to balance the pressure on both sides. Expand.

[0028] The float 501 of the float oil level gauge 5 is swingably arranged in an oil storage chamber through a float rocker 502, so that the float 501 can float up and down with the change of the oil level. The float 501 abuts against the capsule in the oil storage chamber. When the oil level in the oil storage chamber changes, the float 501 moves up and down with the change of the oil level under the buoyancy. It should be noted that the sum of the length of the float rocker 502 and the diameter of the float 501 should be equal to or greater than the height of the cabinet 1, that is, greater than the size of the cabinet 1 in the Y direction, to ensure that the oil level can be effectively detected.

[0029] Compared with the prior art, the inner cavity of the cabinet body 1 of the capsule-type oil storage cabinet for the on-board transformer provided in the embodiment of the present invention is divided into at least two oil storage chambers, and a capsule is arranged in each oil storage chamber, which can greatly shorten the length and weight of the capsule, thereby avoiding the problem that the float 501 of the float oil level gauge 5 is pressed by the capsule due to the capsule being too long and too heavy, thereby displaying a false oil level. At the same time, the inner cavity of the cabinet body 1 is divided into multiple oil storage chambers. Based on fluid-solid coupling mechanics, the partition structure between the oil storage chambers can reduce the oil shaking amplitude in the capsule-type oil storage cabinet for the on-board transformer during vehicle operation, thereby reducing the impact of oil shaking on the float swing arm 502 of the float oil level gauge 5, and reducing the problem of damage to the float swing arm 502.

[0030] To further optimize the above technical solution, in order to minimize the influence of the capsule on the float 501 of the float oil level gauge 5, in a preferred embodiment of the present application, the length of at least one oil storage chamber is smaller than that of other oil storage chambers, and the float oil level gauge 5 is arranged in the oil storage chamber with the smallest length. When the length of the oil storage chamber is the smallest, the size of the capsule in the oil storage chamber is also the smallest and the weight is the lightest, which can better prevent the float 501 of the float oil level gauge 5 in the oil storage chamber from being pressed by the capsule. At the same time, the oil storage amount in the oil storage chamber is the smallest, and the kinetic energy generated by the shaking is relatively small, which is not easy to cause damage to the float rocker arm 502 of the float oil level gauge 5.

[0031] like Figure 1As shown, in a specific embodiment, the inner cavity of the cabinet 1 is divided into two oil storage chambers, the length of the right oil storage chamber 101 is smaller than the length of the left oil storage chamber 102, and accordingly, the length of the capsule 2 in the right oil storage chamber 101 is smaller than the length of the capsule 3 in the left oil storage chamber 102, and the float 501 and the float rocker 502 of the float oil level gauge 5 are arranged in the right oil storage chamber 102.

[0032] Specifically, in one embodiment of the present application, the ratio of the length to the height of the oil storage chamber provided with the float oil level gauge 5 is 2:1. Under this size, the buoyancy of the float 501 can hold up the capsule in the oil chamber. Of course, it should be noted that the ratio of the length to the height of the oil storage chamber provided with the float oil level gauge 5 is not limited to 2:1. Those skilled in the art can adjust the ratio of the length to the height of the oil storage chamber provided with the float oil level gauge 5 as needed.

[0033] To facilitate the connection between the cabinet 1 and the connecting pipe 4, a first flange structure is set on the cabinet 1 at the position where the capsule is installed, and a second flange structure matching the first flange structure is set at the end of the connecting pipe 4. The first flange structure and the second flange structure are connected by bolts, and a sealing ring is clamped between the mating surfaces of the first flange structure and the second flange structure to achieve sealing between the cabinet 1 and the connecting pipe 4.

[0034] like Figure 2 and Figure 3 As shown, in one embodiment of the present application, the inner cavity of the cabinet 1 is divided into multiple oil storage chambers by the baffle plate 6, and two adjacent oil storage chambers are connected through the gap between the baffle plate 6 and the inner cavity wall of the cabinet 1 and / or the through hole 601 on the baffle plate 6, that is, the two adjacent oil storage chambers can be connected only through the gap between the baffle plate 6 and the inner cavity wall of the cabinet 1, or can be connected only through the through hole 601 on the baffle plate 6, or can be connected through the gap between the baffle plate 6 and the inner cavity wall of the cabinet 1 and the through hole 601 on the baffle plate 6 at the same time, the through hole 601 can be a circular hole or a strip hole, the strip hole can extend along the height direction or width direction of the cabinet 1, and there is a gap between at least one side edge of the baffle plate 6 and the inner cavity wall of the cabinet 1 to ensure that the various oil storage chambers can be effectively connected without affecting the exhaust above the oil storage chamber and the oil discharge below.

[0035] In the above embodiment, the baffle 6 is composed of a whole plate, and the material of the plate is made of a material with high strength, corrosion resistance, high temperature resistance, and stable chemical properties, such as a stainless steel plate.

[0036] The baffle plate 6 is only a preferred implementation scheme provided by an embodiment of the present application. In practical applications, it is not limited to the structure of the baffle plate 6. Figure 4As shown, in another specific embodiment, the inner cavity of the cabinet 1 is divided into a plurality of oil storage chambers by a flow-blocking grid 6', and the flow-blocking grid 6' is composed of a plurality of plates intersecting horizontally and vertically, and a grid hole for the insulating oil to pass through is formed between two adjacent longitudinal plates and two adjacent transverse plates. The thickness and number of the plates determine the side length of the grid hole, so those skilled in the art can adjust the thickness and number of the plates as needed, so as to ensure the strength of the flow-blocking grid 6' while ensuring the blocking effect on the insulating oil.

[0037] like Figure 2 As shown, in a specific embodiment of the present application, gaps are set between the lower edge of the baffle plate 6 and the bottom of the inner cavity of the cabinet 1, and between the upper edge of the baffle plate 6 and the top of the inner cavity of the cabinet 1, so that the gap 12 between the upper edge of the baffle plate 6 and the top of the inner cavity of the cabinet 1 can be used for venting when filling oil, and the gap 13 between the lower edge of the baffle plate 6 and the bottom of the inner cavity of the cabinet 1 can be used for draining oil when draining oil.

[0038] To further optimize the above technical solution, in one embodiment of the present application, one end of the connecting tube 4 is connected to the atmosphere through a desiccant 7. The desiccant 7 can absorb moisture in the air, thereby preventing water vapor from entering the capsule and preventing the expansion and contraction of the capsule from being affected.

[0039] In order to prevent impurities in the air from entering the capsule, a filter may be provided at one end of the desiccant 7 away from the connecting pipe 4 to filter the air entering the capsule.

[0040] As preferably, Figure 1 As shown, an exhaust mechanism is arranged on the top of the cabinet 1, and the exhaust mechanism includes an exhaust pipe 801 and an exhaust one-way valve 802. One end of the exhaust pipe 801 is connected to an oil storage chamber, and the other end is provided with an exhaust one-way valve 802. The exhaust one-way valve 802 is used to unidirectionally conduct the cabinet 1 from the inside to the outside. When oil is added to the cabinet 1, the oil level gradually rises, squeezing the gas in the cabinet 1. When the gas pressure is greater than the atmospheric pressure, the exhaust one-way valve 802 is opened to achieve exhaust. When the oil in the cabinet 1 is discharged, the internal pressure of the cabinet 1 is less than or equal to the atmospheric pressure, and the exhaust one-way valve 802 is closed to prevent external gas from entering the cabinet 1, thereby avoiding contact between the insulating oil in the cabinet 1 and the air.

[0041] To further improve safety, an air pressure detection device is also provided on the exhaust pipe 801. The air pressure detection device is located between the exhaust check valve 802 and the cabinet 1. The air pressure detection device is used to detect the air pressure in the cabinet 1, and the air pressure detection device is connected to a controller. The controller is communicatively connected to the user terminal. When the air pressure detection device detects that the air pressure in the cabinet 1 exceeds a preset value, the controller sends an alarm signal to the user terminal.

[0042] To further optimize the above technical solution, the exhaust pipe 801 is connected to an emergency exhaust pipeline, and an openable and closable emergency exhaust one-way valve is provided on the air intake and exhaust pipeline. The emergency exhaust one-way valve is communicatively connected to the above-mentioned controller. The emergency exhaust one-way valve is normally closed. When the air pressure detection device detects that the air pressure in the cabinet 1 exceeds the preset value, the controller controls the emergency exhaust one-way valve to open to discharge the gas in the cabinet 1 as soon as possible to avoid excessive pressure in the cabinet 1, thereby improving safety.

[0043] See also Figure 1 In one embodiment of the present application, a connecting pipe 9 for communicating with the transformer box and an oil filling and draining pipe 10 for filling and draining oil are provided at the bottom of the cabinet 1. One end of the oil filling and draining pipe 10 is connected to an oil storage chamber, and a switch valve is provided at the other end. In actual application, oil filling or draining operations can be performed by opening the switch valve. When the switch valve is closed, the insulating oil in the cabinet 1 cannot be discharged, and insulating oil cannot be injected into the cabinet 1.

[0044] The oil filling and draining pipe 10 is arranged at one end of the cabinet 1, and the inner bottom of the cabinet 1 gradually tilts downward from the end away from the oil filling and draining pipe 10, that is, the inner bottom of the cabinet 1 has a certain slope, so as to facilitate draining the insulating oil in the cabinet 1 when replacing the insulating oil.

[0045] In order to facilitate the installation of the capsule oil storage cabinet for the vehicle transformer, in one embodiment of the present application, as Figure 1 As shown, a cabinet foot 11 for supporting the cabinet 1 is arranged at the bottom of the cabinet 1, and a connecting structure for detachably connecting with the box cover of the transformer box is arranged on the cabinet foot 11. A plurality of cabinet feet 11 can be arranged at intervals along the length direction of the cabinet 1, and a connecting structure for installing the capsule oil storage cabinet for the vehicle-mounted transformer to the box cover of the vehicle-mounted transformer is reserved on each cabinet foot 11. The connecting structure can be one or more through holes.

[0046] An embodiment of the present application also provides a vehicle-mounted transformer, which includes a capsule-type oil conservator for a vehicle-mounted transformer as described in the above embodiment. Since the vehicle-mounted transformer adopts the capsule-type oil conservator for a vehicle-mounted transformer in the above embodiment, the technical effect of the vehicle-mounted transformer please refer to the above embodiment.

[0047] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0048] It should be understood that the use of "system", "device", "unit" and / or "module" in this application is only a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

[0049] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0050] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0051] If a flow chart is used in the present application, the flow chart is used to illustrate the operations performed by the system according to the embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, each step can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a certain step or several steps of operations can be removed from these processes.

[0052] It should also be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such articles or devices. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0053] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A capsule oil storage cabinet for a vehicle-mounted transformer, characterized in that: include: A cabinet body, wherein a plurality of oil storage chambers interconnected with each other are arranged in the cabinet body; A capsule, wherein the capsule is disposed on the top of each oil storage chamber, the bottom of the capsule is in close contact with the oil surface in the oil storage chamber, the air inlet and outlet of each capsule are connected to each other through a connecting pipe, and the connecting pipe is connected to the atmosphere, so that the capsule expands or contracts under the action of oil pressure and atmospheric pressure; A ball float oil level gauge, wherein a float of the ball float oil level gauge is swingably arranged in an oil storage chamber so that the float can float up and down with the change of the oil level, and the float abuts against the capsule in the oil storage chamber.

2. The capsule oil conservator for vehicle-mounted transformer according to claim 1, characterized in that: The length of at least one of the oil storage chambers is smaller than that of the other oil storage chambers, and the float oil level gauge is arranged in the oil storage chamber with the smallest length.

3. The capsule oil storage cabinet for vehicle-mounted transformer according to claim 2 is characterized in that: The ratio of the length to the height of the oil storage chamber in which the float oil level gauge is provided is 2:

1.

4. The capsule oil conservator for vehicle-mounted transformer according to claim 1, characterized in that: The inner cavity of the cabinet is divided into a plurality of oil storage chambers by a baffle plate, and two adjacent oil storage chambers are connected through a gap between the baffle plate and the inner cavity wall of the cabinet and / or a through hole on the baffle plate.

5. The capsule oil conservator for vehicle-mounted transformer according to claim 3, characterized in that: A gap is arranged between the lower edge of the baffle plate and the bottom of the inner cavity of the cabinet, and between the upper edge of the baffle plate and the top of the inner cavity of the cabinet.

6. The capsule oil conservator for a vehicle-mounted transformer according to any one of claims 1 to 5, characterized in that: One end of the connecting pipe is connected to the atmosphere through a desiccant.

7. The capsule oil conservator for a vehicle-mounted transformer according to any one of claims 1 to 5, characterized in that: An exhaust mechanism is arranged on the top of the cabinet, and the exhaust mechanism includes an exhaust pipe and an exhaust one-way valve. One end of the exhaust pipe is connected to one of the oil storage chambers, and the other end is provided with the exhaust one-way valve. The exhaust one-way valve is used to conduct one-way flow from the inside to the outside of the cabinet.

8. The capsule oil conservator for a vehicle-mounted transformer according to any one of claims 1 to 5, characterized in that: A connecting pipe for communicating with the transformer box and an oil injection and discharge pipe for injecting and discharging oil are arranged at the bottom of the cabinet. One end of the oil injection and discharge pipe is communicated with one of the oil storage chambers, and a switch valve is arranged at the other end.

9. The capsule oil conservator for a vehicle-mounted transformer according to any one of claims 1 to 5, characterized in that: The bottom of the cabinet is provided with cabinet feet for supporting the cabinet, and the cabinet feet are provided with connection structures for detachably connecting with the box cover of the transformer box.

10. A vehicle-mounted transformer, characterized in that: It comprises a capsule-type oil storage cabinet for a vehicle-mounted transformer as described in any one of claims 1 to 9.

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