Oil filtering and taking device and oil tank assembly

Abstract

The utility model relates to an oil filtering and taking device and an oil tank assembly, the oil filtering and taking device comprises an oil inlet pipe and an adjusting structure, the oil inlet pipe is provided with an upper end opening, a lower end opening and an outflow end opening, the upper end opening is used for air inlet, the lower end opening is used for oil liquid at the bottom in an oil tank to enter, and the outflow end opening is used for being connected with an oil taking opening; the adjusting structure is used for adjusting the position of the oil inlet pipe in the height direction of the oil tank so as to change the height position of the outflow port, the oil filtering and taking device is arranged at the oil taking port of the side wall in the oil tank, oil can flow out of the oil taking port after passing through the oil inlet pipe, and when the liquid level of the oil is lowered to the oil stopping level, the oil stops flowing out. The amount of oil flowing out of the oil taking opening through the oil inlet pipe in the oil tank can be adjusted through the adjusting structure, and adjustment of the oil stopping liquid level is achieved.

Description

Technical Field

[0001] This disclosure relates to the field of fuel tank components, specifically to an oil filtration and extraction device and a fuel tank assembly. Background Technology

[0002] The quality of lubricating oil plays a crucial role in the safe and stable operation of steam turbines. External oil filtration devices draw and filter the oil in the tank through an oil inlet on the side wall to ensure good oil quality, as illustrated in Chinese Utility Model Patent Publication No. CN206860560U. Different steam turbines have different minimum requirements for the lubricating oil level in the tank. If the external oil filtration device suddenly leaks, it can cause a large amount of oil to leak from the tank. When the oil level in the tank falls below the minimum requirement, it will force the steam turbine to stop operating, resulting in significant losses. Utility Model Content

[0003] The purpose of this disclosure is to provide an oil filtration and extraction device and an oil tank assembly to at least partially solve the technical problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides an oil filtration and extraction device, suitable for installation inside an oil tank with an oil extraction port on its side wall, the oil filtration and extraction device comprising:

[0005] The oil inlet pipe has an upper port, a lower port, and an outlet port. The upper port is used for air intake, the lower port is used for oil to enter from the bottom of the oil tank, and the outlet port is used to connect to the oil outlet.

[0006] An adjustment structure is provided to adjust the position of the oil inlet pipe in the height direction of the oil tank, so as to change the height position of the outlet port.

[0007] Optionally, the adjustment structure includes an oil outlet pipe and at least two connecting pipes;

[0008] The oil outlet pipe has an oil outlet port and an oil inlet port, and the oil outlet port is used to connect to the oil intake port.

[0009] Each of the connecting pipes has a first port and a second port, the second port being detachably connected to the oil inlet port, and the distances between the first port and the second port of the at least two connecting pipes in the height direction of the oil tank are different; and

[0010] The outflow port is selectively and detachably connected to the second port of one of the at least two connecting pipes.

[0011] Optionally, the oil inlet port includes a first oil inlet port and a second oil inlet port disposed between the first oil inlet port and the oil outlet port;

[0012] In the height direction of the oil tank, the first oil inlet port is flush with the oil outlet port, and the second oil inlet port is higher or lower than the oil outlet port.

[0013] Optionally, one of the at least two connecting pipes includes a first segment having the first port, a second segment having the second port, and a connecting segment for connecting the first segment and the second segment, wherein the axis of the first segment is perpendicular to the axis of the second segment.

[0014] Optionally, the oil inlet port includes a first oil inlet port;

[0015] One of the at least two connecting pipes includes a first segment having the first port, a second segment having the second port, and an arc-shaped connecting segment for connecting the first segment and the second segment, wherein the axis of the first segment is parallel to the axis of the second segment.

[0016] Optionally, the oil inlet pipe has an extension section, and the lower end of the extension section is provided with the lower port.

[0017] The extension segment is configured to be able to extend and retract along its own axis.

[0018] Optionally, the oil inlet pipe has an extension section, and the lower end of the extension section is provided with the lower port.

[0019] The extension section is arranged at an angle to the height of the oil tank, and / or the lower end of the oil inlet pipe is spaced 50mm to 150mm from the inner bottom wall of the oil tank.

[0020] Optionally, the oil inlet pipe further includes a connecting section, the connecting section being provided with the outlet port, and the upper end of the extension section being detachably connected to the lower end of the connecting section.

[0021] Optionally, the adjustment structure includes a support frame, a movable part, and a connecting pipe. The connecting pipe is used for communication between the oil inlet pipe and the oil outlet. The movable part is connected to the oil inlet pipe. The support frame is used for mounting on the oil tank. The connecting pipe has an oil inlet port adapted to be connected to the outflow port of the oil inlet pipe and an oil outlet port adapted to be connected to the oil outlet.

[0022] The movable part is configured to be movable along the support frame in the height direction of the oil tank.

[0023] According to a second aspect of this disclosure, an oil tank assembly is provided, including an oil tank and the aforementioned oil filtering and extraction device;

[0024] The oil tank has an oil inlet on its side wall, the oil filter and oil extraction device is inside the oil tank, and the oil outlet is connected to the oil inlet.

[0025] The above technical solution involves installing the oil filtration and extraction device at the oil outlet on the side wall of the oil tank. Oil in the tank flows out through the oil inlet after passing through the inlet pipe. Since the upper port of the inlet pipe can be used for air intake, as oil continuously flows out of the outlet and the oil level in the tank continuously decreases, when the oil level drops to the specified oil flow height defined by the inlet pipe, air passes through the upper port of the inlet pipe, closing the flow path from the lower port to the outlet port. This stops the oil from flowing out of the outlet on the side wall, achieving the effect of stopping the oil flow. Simultaneously, because the adjustment structure can change the position of the inlet pipe in the height direction of the oil tank, the specified oil flow height can be adjusted, thereby regulating the amount of oil flowing out of the tank through the inlet pipe from the oil outlet on the side wall, thus achieving the adjustment of the oil level to stop the oil flow.

[0026] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a cross-sectional schematic diagram of a fuel tank assembly according to an embodiment of the present disclosure.

[0029] Figure 2 This is a cross-sectional schematic diagram of a fuel tank assembly according to another embodiment of the present disclosure.

[0030] Figure 3 This is a cross-sectional schematic diagram of a fuel tank assembly according to another embodiment of the present disclosure.

[0031] Explanation of reference numerals in the attached figures

[0032] 100-Oil filtration and extraction device, 1-Oil outlet pipe, 2-Connecting pipe, 3-Oil inlet pipe, 11-Oil outlet port, 12-Oil inlet port, 21-First port, 121-First oil inlet port, 122-Second oil inlet port, 22-Second port of connecting pipe, 23-First section, 24-Connecting section, 25-Second section, 31-Upper port, 32-Lower port, 33-Outlet port, 301-Connecting section, 302-Extension section, 4-Ventil pipe, 200-Oil tank, 201-Oil extraction port, 200-Oil tank, 201-Oil extraction port, 202-Side wall, 300-Oil tank assembly. Detailed Implementation

[0033] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0034] It should be understood in this disclosure that, unless otherwise stated, directional terms such as "upper" and "lower" indicate orientation or positional relationships based on the drawing directions shown in the corresponding figures. These terms are used solely for ease of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this disclosure. The terms "inner" and "outer" can refer to the inside or outside of the corresponding component. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not have sequential or importance implications. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element.

[0035] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0036] The lubrication system of a steam turbine generator set plays a crucial role in ensuring the safe and stable operation of the rotating equipment. Both the cleanliness of the oil and the maintenance of the oil level in the tank are paramount. During daily operation, factors such as bearing wear, external dust, and moisture intrusion inevitably lead to oil quality deterioration issues like excessive moisture and particle size. Therefore, a dedicated oil inlet is typically installed on the side wall of the lubrication tank to filter the oil. An external oil pump draws oil from this inlet, which is then piped and valved to an external filter for filtration. The filtered oil is then returned to the lubrication tank to maintain its optimal quality. However, when the external oil filter suddenly leaks, the oil inside the tank will continuously flow out through the oil outlet. At the same time, the external oil filter, due to the malfunction, cannot return the continuously flowing oil from the oil outlet to the lubricating oil tank, causing the oil level in the tank to drop rapidly. When the oil level drops below the minimum oil level required by the turbine generator set, the turbine generator set will be forced to stop operating, resulting in significant economic losses.

[0037] Therefore, when an external oil filter suddenly leaks, and the oil in the tank continues to flow through the oil inlet on the side wall, ensuring that the oil level in the tank, after dropping due to continuous outflow, does not fall below the minimum level required by the turbine generator set is a problem worthy of careful consideration. Furthermore, in practical operation, both the turbine generator set and the lubricating oil tank are large pieces of equipment. In some cases, such as when the power generation demand of the turbine generator set is adjusted, certain key components are often replaced to meet the power generation requirements. For example, using a more efficient turbine will impose new requirements on the minimum lubricating oil level. If the lubricating oil tank is replaced to adapt to the updated turbine, on the one hand, the lubricating oil system becomes complex, involving a large amount of engineering work and time; on the other hand, the replaced lubricating oil tank is difficult to reuse in other turbine generator sets, resulting in a waste of resources. For example, by replacing the lubricating oil tank with one of larger capacity to allow for longer continuous operation of the turbine generator set, the minimum oil level required by the turbine in the replaced tank also changes. Therefore, the main technical problem this application aims to solve is how to design a device that can limit the oil level in the tank to the minimum level required by the turbine generator set in the event of a sudden leak in the external oil filter, ensuring it does not fall below the minimum required level. Furthermore, this device should be adaptable to the requirements of different tanks and / or turbines, allowing for adaptive adjustments based on varying minimum level requirements.

[0038] In view of this, such as Figures 1 to 3 As shown, this disclosure provides an oil filtration and extraction device 100, suitable for installation inside an oil tank 200 with an oil extraction port 201 on the side wall 202. The oil filtration and extraction device 100 includes an oil inlet pipe 3 and an adjustment structure. The oil inlet pipe 3 has an upper port 31, a lower port 32, and an outlet port 33. The upper port 31 is used for air intake, the lower port 32 is used for oil from the bottom of the oil tank 200 to enter, and the outlet port 33 is used to connect to the oil extraction port 201. The adjustment structure is used to adjust the position of the oil inlet pipe 3 in the height direction of the oil tank to change the height position of the outlet port 33.

[0039] Through the above technical solution, the oil filtration and extraction device 100 is set at the oil extraction port 201 on the side wall of the oil tank. The oil in the oil tank can flow out from the oil extraction port 201 on the side wall through the oil inlet pipe 3. Since the upper port 31 of the oil inlet pipe 3 can be used for air intake, as the oil continuously flows out from the oil extraction port 201 and the oil level in the oil tank continuously decreases, when the oil level drops to the oil flow height limited by the oil inlet pipe 3, that is, when the oil level drops to the oil stop level, air enters the oil inlet pipe 3 through the upper port 31, closing the flow path from the lower port 32 of the oil inlet pipe 3 to the outlet port 33, thereby stopping the oil in the oil tank from flowing out from the oil extraction port 201 on the side wall, achieving the effect of automatic oil stop. Meanwhile, since the adjustment structure has the function of changing the position of the oil inlet pipe 3 in the height direction of the oil tank, the oil inlet pipe 3 can be adjusted to regulate the oil flow height. This allows for the adjustment of the amount of oil flowing out of the oil tank 200 through the oil inlet pipe 3 from the oil outlet 201 on the side wall of the oil tank. In other words, it enables the adjustment of the oil stop level in the oil tank. Therefore, it can be applied to the oil outlets of different oil tanks for oil extraction, and it can also be applied to the same oil tank supplying oil to different steam turbines, allowing for rapid adjustment of the oil stop level in the oil tank according to different minimum liquid level requirements. It has extremely high versatility and practicality.

[0040] The following explains the oil flow height and oil stop level defined by the oil inlet pipe 3.

[0041] Because the upper port 31 and lower port 32 of the oil inlet pipe 3 are connected and communicate with the inner cavity of the oil tank 200, when the oil tank 200 is filled with oil, the oil level inside the oil inlet pipe 3 and the oil level outside the oil inlet pipe 3 are level. When oil filtration is required, an external oil pump draws oil from the oil tank 200, and the oil flows into the oil tank 200 through the outflow port 33 of the oil inlet pipe 3. The oil level in the oil tank 200 continues to drop, and at the same time, the oil level inside the oil inlet pipe 3 and the oil level outside the oil inlet pipe 3 in the oil tank 200 always remain level.

[0042] With this design, when the oil level drops to the lowest point of the inner diameter edge of the outlet port 33 of the oil inlet pipe 3, the attached... Figure 1 As indicated by the dashed line PL, the space above the position indicated by PL inside and outside the oil inlet pipe 3 in the oil tank 200 is filled with air. Therefore, oil cannot flow from the lower port 32 of the oil inlet pipe 3 to the outlet port 33, thus stopping the flow of oil from the oil outlet 201, achieving the effect of automatic oil stoppage. In other words, the oil flow height limited by the oil inlet pipe 3 is determined by the lowest point of the inner diameter edge of its outlet port 33. The distance between this lowest point and the inner bottom wall of the oil tank 200 in the height direction of the oil tank is defined as the oil flow height limited by the oil inlet pipe 3, and the position of the lowest point of the inner diameter edge of the corresponding outlet port 33, i.e., the position indicated by PL in the figure, is defined as the oil stop level.

[0043] In some embodiments of this disclosure, the regulating structure includes an oil outlet pipe 1 and at least two connecting pipes 2. The oil outlet pipe 1 has an oil outlet port 11 and an oil inlet port 12, with the oil outlet port 11 for connection to an oil intake port 201. Each connecting pipe 2 has a first port 21 and a second port 22, with the second port 22 for detachable connection to the oil inlet port 12. The distances between the first port 21 and the second port 22 of the at least two connecting pipes 2 are different in the height direction of the oil tank. The outlet port 33 of the oil inlet pipe 3 is selectively and detachably connected to the second port 22 of one of the at least two connecting pipes 2.

[0044] In this embodiment, there are at least two connecting pipes 2, and the distance between the first port 21 and the second port 22 of each connecting pipe in the height direction of the oil tank is different from that of the other connecting pipes. Therefore, when different connecting pipes are used to connect the oil inlet pipe 3 and the oil outlet pipe 1, the distance between the outflow port 33 of the oil inlet pipe 3 and the outflow port 11 of the oil outlet pipe 1 in the height direction of the oil tank is different. In other words, by changing different connecting pipes, the distance from the outflow port 33 of the oil inlet pipe 3 to the inner bottom wall of the oil tank 200 can be adjusted, ultimately achieving the adjustment of the oil level.

[0045] In some embodiments, the oil inlet port 12 includes a first oil inlet port 121 and a second oil inlet port 122 disposed between the first oil inlet port 121 and the oil outlet port 11. In the height direction of the oil tank, the first oil inlet port 121 is flush with the oil outlet port 11, and the second oil inlet port 122 is higher than the oil outlet port 11.

[0046] Since the first oil inlet port 121 is flush with the oil outlet port 11, when the required oil stop level is flush with the lowest point of the inner diameter edge of the oil outlet 201, refer to the attached... Figure 3 At this point, the connecting pipe 2 can be a straight pipe, or the second inlet port 122 can be closed by directly connecting the outlet port 33 of the inlet pipe 3 to the first inlet port 121 of the outlet pipe 1, for example by sealing with a sealing cap. By eliminating the use of a connecting pipe, the number of parts can be reduced, resulting in a more compact structure.

[0047] With this design, when the required oil level is higher than the oil inlet 201, the connecting pipe 2 connects the outlet port 33 of the oil inlet pipe 3 to the second inlet port 122 of the oil outlet pipe 1. The first port 21 of the connecting pipe 2 is connected to the outlet port 33, and the second port 22 of the connecting pipe 2 is connected to the second inlet port 122. At the same time, the first inlet port 121 is closed. The distance between the first port 21 and the second port 22 of the connecting pipe 2 in the height direction of the oil tank is such that the oil flow height defined by the oil inlet pipe 3 is consistent with the required oil level.

[0048] The aforementioned connecting pipe 2 includes a first section 23 with a first port 21, a second section 25 with a second port 22, and a connecting section 24 for connecting the first section 23 and the second section 25. The connecting section 24 can have various structural forms, such as an inclined tube, an arc-shaped tube, or a connecting section 24 composed of multiple inclined tubes and / or arc-shaped tubes connected together. When the connecting section 24 is an arc-shaped connecting section 24, it is more in line with fluid mechanics, facilitating a smoother flow of oil from the first port 21 to the second port 22. The axis of the first section 23 is attached... Figure 1 L1 indicates the axis of the second segment 25. Figure 1 L2 indicates that there is an included angle between them, which can be 90 degrees or other angles. When the angle between them is 90 degrees, that is, the axis of the first segment 23 is perpendicular to the axis of the second segment 25. When the connecting segment 24 adopts an arc-shaped pipe, the connecting pipe 2 is a 90-degree bend pipe. It can be selected from the standard 90-degree bend pipe products on the market without customization. This saves customization costs and time.

[0049] Reference Appendix Figure 2 In some embodiments, the oil inlet port 12 of the oil outlet pipe 1 includes a first oil inlet port 121, and the connecting pipe 2 includes a first section 23 with a first port 21, a second section 25 with a second port 22, and an arc-shaped connecting section 24 for connecting the first section 23 and the second section 25. The axis of the first section 23 is parallel to the axis of the second section 25. When the required oil stop level is flush with the lowest point of the inner diameter edge of the oil outlet 201, the connecting pipe 2 can be a straight pipe, or it can directly connect the outlet port 33 of the oil inlet pipe 3 to the first oil inlet port 121 of the oil outlet pipe 1. When the required oil stop level is higher than the oil outlet 201, the connecting pipe 2 is used to connect the outlet port 33 of the oil inlet pipe 3 to the first oil inlet port 121 of the oil outlet pipe 1. The distance between the first port 21 and the second port 22 of the connecting pipe 2 in the height direction of the oil tank is such that the oil flow height defined by the oil inlet pipe 3 is consistent with the height of the required oil stop level. The first port 21 of the connecting pipe 2 is connected to the outlet port 33, and the second port 22 of the connecting pipe 2 is connected to the first oil inlet port 121. The axis of the first segment 23 and the axis of the second segment 25 have an angle. When the two are parallel, it is beneficial to the manufacturing of the connecting pipe 2.

[0050] In some embodiments, the oil inlet pipe 3 has an extension section 302, and a lower port 32 is provided at the lower end of the extension section 302. The extension section 302 is configured to be able to extend and retract along its own axial direction. Oil enters the oil inlet pipe 3 through the extension section 302. By enabling the extension section 302 to extend and retract along its own axial direction, the distance from the lower port 32 to the inner bottom wall of the oil tank 200 can be adjusted. When the oil flow height defined by the oil inlet pipe 3 is adjusted according to the required oil stop level, the distance between the lower port 32 and the inner bottom wall of the oil tank 200 can be adjusted by the contraction of the extension section 302, thereby bringing the lower port 32 closer to the inner bottom wall of the oil tank 200. This results in the static pressure of the oil generated by the oil at the opening end face of the lower port 32 being greater than that at the upper port 3. The static pressure of the oil at the open end face of 1 means that during the filtration process of the oil in the oil tank 200 by the external oil filter, the oil near the inner bottom wall of the oil tank 200 will enter the oil inlet pipe 3 from the lower port 32 and flow out from the outlet port 33. After adjustment, it will flow out from the oil outlet 201 to the external oil filter for filtration. The filtered oil with good quality will be transported back to the oil tank through the oil inlet at the top of the oil tank. Through continuous circulation filtration, the oil in the oil tank 200 can have good quality, achieving a purification effect. The aforementioned extension section 302 can be a telescopic spiral pipe or a corrugated pipe, and this disclosure does not limit it to this.

[0051] During the daily operation of a steam turbine, the oil in the lubricating oil tank provides lubrication to various rotating equipment through the turbine's oil circuit system, and then flows back to the lubricating oil tank via the same system. Due to factors such as bearing wear in rotating equipment and the intrusion of external dust and moisture, problems such as excessive moisture and particle size inevitably occur, leading to oil quality deterioration. The oil returning to the lubricating oil tank inevitably contains water and particulate matter. Because water and particulate matter are denser than oil, they gradually settle at the bottom of the oil tank 200, resulting in poorer oil quality near the bottom. By incorporating an extension section 302 that can extend and retract along its own axis, it is ensured that the lower port 32 remains close to the inner bottom wall of the oil tank 200 when adjusting the oil level. This allows the oil to enter the inlet pipe 2 from the bottom of the oil tank 200 and finally flow out from the oil outlet 201 to the external oil filter for filtration. Typically, the distance between the lower port 32 of the oil inlet pipe 3 and the inner bottom wall of the oil tank 200 is set to a range of 50mm to 150mm, which allows for better extraction of oil near the bottom of the oil tank 200.

[0052] In some embodiments, refer to the appendix Figure 1 and attached Figure 2The extension section 302 is arranged at an angle to the height direction of the oil tank. The axis L3 of the extension section 302 has an angle with the height direction of the oil tank, for example, 45°. This design is because when relatively large and heavy particles are deposited at the bottom of the oil tank, the inclined extension section 302 can effectively prevent them from passing through the oil inlet pipe 3, thus preventing damage to the external oil filter device.

[0053] Reference Appendix Figure 2 In some embodiments, the oil inlet pipe 3 further includes a connecting section 301, which is provided with an outlet port 33. The upper end of the extension section 302 is detachably connected to the lower end of the connecting section 301. There are various ways in which the two are connected. For example, the upper end of the extension section 302 is sleeved on the lower end of the connecting section 301. The sleeve between the two adopts an interference fit, or it can be a flange connection, or a compression fitting connection, or a threaded connection. This disclosure does not limit this.

[0054] Since the extension section 302 and the connecting section 301 are designed to be detachably connected, by replacing different extension sections 302, such as extension sections of different lengths, it is possible to adjust the oil level by adjusting the structure and then connect an extension section 302 of appropriate length to the lower end of the connecting section 301. This ensures that the lower port 32 of the oil inlet pipe 3 remains close to the inner bottom wall of the oil tank 200, allowing the oil to enter the oil inlet pipe 2 from the bottom of the oil tank 200, thereby achieving the effect of filtering the oil at the bottom of the oil tank 200.

[0055] Reference Appendix Figure 3 In some embodiments, the oil inlet pipe 3 may further include a vent pipe 4, one end of which is connected to the upper port 31, and the other end faces the top of the oil tank 200 for air intake. The vent pipe 4 raises the oil level from the upper port 31 into the oil inlet pipe 3, ensuring that the hydrostatic pressure of the oil at the end of the vent pipe 4 facing the top of the oil tank is significantly greater than the hydrostatic pressure at the lower port 32. This allows the oil to be drawn from the bottom when an external oil filter is used to extract oil through the oil inlet 201. The vent pipe 4 may be detachably connected to the upper port 31 for easy replacement with vent pipes of different heights, or it may be a telescopic pipe that can be adjusted to the required venting height; this disclosure does not limit this.

[0056] In some embodiments, the diameter of the flow channel supplying the oil in the oil filtration and extraction device 100 is the same as the diameter of the oil extraction port 201. Specifically, the oil inlet pipe 3 and the connecting pipe 2 each have the same diameter as the oil extraction port 201. When the diameter is larger than the diameter of the oil extraction port 201, it generally does not affect the extraction of oil. However, if the diameter is too large, it will increase the required materials and manufacturing costs. If it is too small, the amount of oil absorbed per unit time will decrease, which will affect the oil extraction efficiency. When the diameters are matched, by setting the same diameter as the oil extraction port 201, the flow rate requirement of the flow path can be met without causing waste.

[0057] In this disclosure, in addition to the above-described structural design including multiple connecting pipes 2, where the height of the outlet port 33 of the oil inlet pipe 3 is adjusted by replacing connecting pipes 2 of different sizes, in some other embodiments, the adjusting structure includes a support frame, a movable part, and a connecting pipe. The connecting pipe is used for communication between the oil inlet pipe and the oil outlet 201. The movable part is connected to the oil inlet pipe. The support frame is used for mounting on the oil tank 200. The connecting pipe has an oil inlet port suitable for connection to the outlet port 33 of the oil inlet pipe 3 and an oil outlet port suitable for connection to the oil outlet 201. The movable part is configured to be movable along the support frame in the height direction of the oil tank.

[0058] By setting an oil inlet port at one end of a connecting pipe suitable for connecting to the outlet port 33 of the oil inlet pipe 3, and an oil outlet port at the other end suitable for connecting to the oil outlet 201, the oil enters the oil inlet pipe 3, flows through the outlet port 33 and out of the oil outlet 201, ensuring smooth oil flow. Simultaneously, by setting a movable part that can move along the support frame in the height direction of the oil tank, the oil inlet pipe 3 connected to the movable part can move in the height direction of the oil tank, allowing adjustment of the height of the outlet port 33 of the oil inlet pipe 3. This enables adjustment of the oil stop level, suitable for quick and convenient adjustment of the oil stop level in different oil tanks.

[0059] In one specific implementation, the connecting pipe can be a telescopic flexible hose, with one end as an oil inlet port connected to the outlet port 33 of the oil inlet pipe 3, and the other end as an oil outlet port connected to the oil outlet 201. The movable part may include a sleeve with a threaded hole on the side wall 202, a telescopic rod fitted inside the sleeve, and a brake nut suitable for screwing into the threaded hole on the sleeve. The sleeve is fixedly connected to a support frame, which is set on the inner wall of the oil tank 200. One end of the telescopic rod is fixedly connected to the oil inlet pipe 3. During the adjustment process, according to the required oil stop level, the telescopic rod is adjusted so that the outlet port 33 of the oil inlet pipe 3 is located at the oil stop level. The brake nut is used to lock the part of the telescopic rod inside the sleeve, thereby limiting the outlet port 33 to the required oil stop level position.

[0060] According to a second aspect of this disclosure, an oil tank assembly 300 is provided, including an oil tank 200 and the aforementioned oil filtration and extraction device 100. An oil outlet 201 is provided on the side wall 202 of the oil tank 200, and the oil filtration and extraction device 100 is disposed inside the oil tank 200, with its outlet port connected to the oil outlet 201.

[0061] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0063] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An oil filtration and extraction device, suitable for installation inside an oil tank with an oil extraction port on its side wall, characterized in that, The oil filtration and extraction device includes: An oil inlet pipe has an upper port, a lower port, and an outlet port. The upper port is used for air intake, the lower port is used for oil to enter from the bottom of the oil tank, and the outlet port is used to connect to the oil outlet. An adjustment structure is provided to adjust the position of the oil inlet pipe in the height direction of the oil tank, so as to change the height position of the outlet port.

2. The oil filtration and extraction device according to claim 1, characterized in that, The regulating structure includes an oil outlet pipe and at least two connecting pipes; The oil outlet pipe has an oil outlet port and an oil inlet port, and the oil outlet port is used to connect to the oil intake port. Each of the connecting pipes has a first port and a second port, the second port being detachably connected to the oil inlet port, and the distance between the first port and the second port of the at least two connecting pipes in the height direction of the oil tank is different; as well as The outflow port is selectively and detachably connected to the second port of one of the at least two connecting pipes.

3. The oil filtration and extraction device according to claim 2, characterized in that, The oil inlet port includes a first oil inlet port and a second oil inlet port disposed between the first oil inlet port and the oil outlet port; In the height direction of the oil tank, the first oil inlet port is flush with the oil outlet port, and the second oil inlet port is higher than the oil outlet port.

4. The oil filtration and extraction device according to claim 3, characterized in that, One of the at least two connecting pipes includes a first segment having the first port, a second segment having the second port, and a connecting segment for connecting the first segment and the second segment, wherein the axis of the first segment is perpendicular to the axis of the second segment.

5. The oil filtration and extraction device according to claim 2, characterized in that, The oil inlet port includes a first oil inlet port; One of the at least two connecting pipes includes a first segment having the first port, a second segment having the second port, and an arc-shaped connecting segment for connecting the first segment and the second segment, wherein the axis of the first segment is parallel to the axis of the second segment.

6. The oil filtration and extraction device according to any one of claims 1-5, characterized in that, The oil inlet pipe has an extension section, and the lower end of the extension section is provided with the lower port. The extension segment is configured to be able to extend and retract along its own axis.

7. The oil filtration and extraction device according to any one of claims 1-5, characterized in that, The oil inlet pipe has an extension section, and the lower end of the extension section is provided with the lower port. The extension section is arranged at an angle to the height of the oil tank, and / or the lower end of the oil inlet pipe is spaced 50mm to 150mm from the inner bottom wall of the oil tank.

8. The oil filtration and extraction device according to claim 7, characterized in that, The oil inlet pipe also includes a connecting section, which is provided with the outlet port, and the upper end of the extension section is detachably connected to the lower end of the connecting section.

9. The oil filtration and extraction device according to claim 1, characterized in that, The adjustment structure includes a support frame, a movable part, and a connecting pipe. The connecting pipe is used for communication between the oil inlet pipe and the oil outlet. The movable part is connected to the oil inlet pipe. The support frame is used for installation in the oil tank. The connecting pipe has an oil inlet port suitable for connection to the outflow port of the oil inlet pipe and an oil outlet port suitable for connection to the oil outlet. The movable part is configured to be movable along the support frame in the height direction of the oil tank.

10. A fuel tank assembly, characterized in that, Includes an oil tank and an oil filtration and extraction device according to any one of claims 1-9; The oil tank has an oil inlet on its side wall, the oil filter and oil extraction device is inside the oil tank, and the outflow port is used to connect to the oil inlet.

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