A hydraulic oil tank filtering device for a mine dump truck

Abstract

The utility model provides a kind of mine dump truck hydraulic oil tank filter device, including at least one filter assembly being arranged in hydraulic oil tank, the filter assembly includes the filter cartridge of upper end with the upper end inside hydraulic oil tank fixed connection, the filter cartridge lower end is provided with the oil outlet pipe being communicated with hydraulic oil tank, the filter cartridge is provided with hollow filter core, the filter core is sleeved on the oil outlet pipe upper side;It further includes main inlet pipe, one end of the main inlet pipe is fixedly connected with steel pipe flange, for inputting backflow hydraulic oil, other end is communicated with filter cartridge by branch inlet pipe.The filter assembly is built-in in hydraulic oil tank, compared with external filter device, realize larger flow filtering function, install filter assembly by upper end and fixed connection with hydraulic oil tank, side is fixed by main inlet pipe and hydraulic oil tank side plate, provide lateral support to filter assembly, more stable in use process, not affected by vibration generated by vehicle operation, and more reasonable in layout.

Description

Technical Field

[0001] This utility model relates to a hydraulic oil tank filtration device for mining dump trucks, belonging to the field of engineering machinery technology. Background Technology

[0002] Currently, traditional hydraulic oil tanks in mining dump trucks generally use external or internal return oil filters, which have the following disadvantages: Limited filter element capacity: External return oil filters are limited by the inner diameter of the pipeline, resulting in a small filter element volume and limited capacity to hold impurities. This makes them prone to clogging, leading to decreased filtration efficiency and requiring frequent filter element replacements, resulting in high maintenance costs. Difficulty in detecting system back pressure: With internal return oil filters, it is difficult to directly install a pressure gauge to monitor the pressure difference before and after filtration, making it impossible to promptly determine the filter element clogging status. High maintenance and replacement difficulty: Internal filters require disassembling the return oil pipeline to access the filter element, and the oil must be drained during maintenance. High failure rate: Internal or external filters need to be matched according to the oil pipe specifications, resulting in poor versatility. If the dimensions do not match or the installation process is improper, it may cause local throttling of the oil pipe, leading to system overheating. Summary of the Invention

[0003] Purpose of the invention: In view of the shortcomings of the prior art, this utility model provides a hydraulic oil tank filtration device for mining dump trucks to solve at least one of the technical problems mentioned in the background art.

[0004] Technical solution: A hydraulic oil tank filtration device for a mining dump truck, comprising at least one filtration component disposed inside the hydraulic oil tank, the filtration component comprising a filter cylinder whose upper end is fixedly connected to the upper end of the inner side of the hydraulic oil tank, an oil outlet pipe communicating with the hydraulic oil tank is disposed at the lower end of the filter cylinder, and a hollow filter element is disposed inside the filter cylinder, the filter element being fitted above the oil outlet pipe;

[0005] It also includes a main oil inlet pipe that is fixedly connected to the inner side plate of the hydraulic oil tank. One end of the main oil inlet pipe is fixedly connected to a steel pipe flange for inputting return hydraulic oil, and the other end is connected to the filter cartridge through a branch oil inlet pipe.

[0006] This invention integrates the filter assembly into the hydraulic oil tank, enabling a larger flow rate filtration function compared to an external filter device. The filter assembly is fixedly connected to the hydraulic oil tank at the top and to the side plate of the hydraulic oil tank via the main oil inlet pipe, providing lateral support for the filter assembly. This makes it more stable during use, unaffected by vibrations generated by vehicle operation, and also results in a more rational layout.

[0007] The filter cartridge is welded and fixed to the hydraulic oil tank by a plate arranged around the upper edge of the filter cartridge. A cover plate is provided on the outside of the hydraulic oil tank at the position corresponding to the filter cartridge. The cover plate is installed on the outside of the hydraulic oil tank by a flange.

[0008] The upper end of the filter element is sealed, and the lower end is connected to the hydraulic oil tank through an oil outlet pipe. A compression spring is provided between the sealing side and the cover plate. When the cover plate is closed, the compression spring is in a compressed state. The end of the compression spring near the filter element is fixedly connected to the upper sealing side of the filter element.

[0009] To facilitate easy replacement of the valve core, a combination of a cover plate and a compression spring is used through the upper opening to apply downward pre-pressure to the valve core during operation. This makes the valve core more stable when subjected to lateral hydraulic oil impacts. During replacement, the cover plate is opened, the compression spring releases the pressure, and the filter element can be easily removed for replacement. Through the setting of the mounting plate, the mounting plate is first welded to the outside of the filter cartridge, and then welded to the hydraulic oil tank, ensuring airtightness while simplifying the fixing process.

[0010] At the connection point between the lower inner end of the filter cartridge and the oil outlet pipe, an annular positioning boss is provided that surrounds the outer side of the oil outlet pipe, and the filter element is fastened to the outer edge of the positioning boss.

[0011] To achieve combined positioning in both the upper and lower directions, a corresponding positioning boss is set at the bottom because the filter element has a hollow structure. When the cover is closed, the filter element and the positioning boss cooperate to achieve lateral positioning at the bottom, preventing the flow of hydraulic oil from affecting the position of the filter element and further ensuring the effect of hydraulic oil filtration.

[0012] A baffle is provided between the filter element and the filter cartridge, with both ends fixedly installed inside the filter cartridge. The baffle is directly opposite the outlet of the branch oil pipeline.

[0013] By setting baffles, the hydraulic oil will impact the baffles first when it surges, avoiding direct contact with the filter element and improving the uniformity of filtration.

[0014] The oil outlet pipe is bent at an angle of less than 90 degrees.

[0015] To prevent hydraulic oil from directly impacting the bottom of the hydraulic oil tank, the oil outlet pipe is designed with a bent structure, which can effectively reduce the direct impact of oil on the bottom of the tank and prevent impurities from rising from the bottom of the tank.

[0016] The filter cartridge is also equipped with a bypass opening valve. When the filter element is clogged and the back pressure of the return oil reaches the set pressure of the bypass opening valve, the pressure is released through the bypass opening valve.

[0017] To protect the filtration unit and hydraulic system, when the filter element becomes clogged, the bypass valve can release pressure in a timely manner, ensuring the safety of the filtration components.

[0018] The filter assembly is configured with three parts and two main oil inlet pipes, including a first main oil inlet pipe and a second main oil inlet pipe, which respectively supply hydraulic oil to the lifting system and the braking system. The two filter assemblies share the first main oil inlet pipe and are respectively supplied to a single filter assembly by a branch oil inlet pipe. The other filter assembly is connected to the second main oil inlet pipe through a branch oil inlet pipe.

[0019] To achieve better filtration performance, different numbers of filter components are used depending on the amount of hydraulic oil in the system, thus providing optimal filtration for the hydraulic oil.

[0020] Beneficial effects: This utility model requires no additional external interface or filter housing, and is integrated with the oil tank and oil pipes, reducing the risk of oil leakage caused by poor sealing of external filters; the return oil filter is built-in, and the filter element is placed directly in the filter cartridge inside the oil tank, without occupying additional external space, and can also effectively reduce the space occupied by the built-in filter housing; the filter element capacity selection is not limited by the filter oil port flange joint model, and the filter element size can be selected according to the required oil flow rate. At the same time, the filter element has a built-in bypass opening valve to prevent filter element blockage from increasing system back pressure and system heat generation; filter element replacement is convenient, simply remove the oil tank flange cover and pull out the filter element for replacement. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a structural diagram of the filter assembly of this utility model.

[0023] Figure 2 This is a half-sectional view of the filter component of this utility model.

[0024] Figure 3 The sectional view of the cover plate structure of this utility model is omitted. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Example 1, such as Figures 1 to 3 As shown, a hydraulic oil tank filtration device for a mining dump truck includes at least one filter assembly 1 disposed inside the hydraulic oil tank. The filter assembly 1 includes a filter cylinder 11 whose upper end is fixedly connected to the upper end of the inner side of the hydraulic oil tank. The lower end of the filter cylinder 11 is provided with an oil outlet pipe 12 communicating with the hydraulic oil tank. A hollow filter element 13 is disposed inside the filter cylinder 11, and the filter element 13 is fitted above the oil outlet pipe 12.

[0029] It also includes a main oil inlet pipe that is fixedly connected to the inner side plate of the hydraulic oil tank. One end of the main oil inlet pipe is fixedly connected to the steel pipe flange 2 for inputting the return hydraulic oil, and the other end is connected to the filter cylinder 11 through the branch oil inlet pipe 3.

[0030] This utility model integrates the filter assembly 1 into the hydraulic oil tank, which enables a larger flow rate filtration function compared to an external filter device. The filter assembly 1 is fixedly connected to the hydraulic oil tank at the top and to the side plate of the hydraulic oil tank via the main oil inlet pipe, providing lateral support for the filter assembly 1. This makes it more stable during use and unaffected by vibrations generated by vehicle operation, while also resulting in a more reasonable layout.

[0031] Example 2: The filter cartridge 11 is welded and fixed to the hydraulic oil tank by a plate 4 arranged around the upper edge of the filter cartridge 11. A cover plate 5 is provided on the outside of the hydraulic oil tank at a position corresponding to the filter cartridge 11. The cover plate 5 is installed on the outside of the hydraulic oil tank by a flange.

[0032] The upper end of the filter element 13 is sealed, and the lower end is connected to the hydraulic oil tank through the oil outlet pipe 12. A compression spring 6 is provided between the sealing side and the cover plate 5. When the cover plate 5 is closed, the compression spring 6 is in a compressed state. The end of the compression spring 6 near the filter element 13 is fixedly connected to the upper sealing side of the filter element 13.

[0033] To facilitate easy replacement of the valve core, the valve core is subjected to downward pre-pressure during operation through the upper opening and the combination of cover plate 5 and compression spring 6. This makes the valve core more stable when subjected to lateral hydraulic oil impact. During replacement, the cover plate 5 is opened, the compression spring 6 releases pressure, and the filter element 13 can be easily removed for replacement. Through the setting of the mounting plate 4, the mounting plate 4 is first welded to the outside of the filter cartridge 11, and then welded to the hydraulic oil tank through the mounting plate 4, which ensures airtightness while simplifying the fixing process.

[0034] Example 3: At the connection between the lower inner end of the filter cartridge 11 and the oil outlet pipe 12, an annular positioning boss 7 is provided around the outer side of the oil outlet pipe 12, and the filter element 13 is fastened to the outer edge of the positioning boss 7.

[0035] To achieve combined positioning in both the upper and lower directions, since the filter element 13 has a hollow structure, a corresponding positioning boss 7 is set at the bottom. When the cover plate 5 is closed, the filter element 13 and the positioning boss 7 cooperate to achieve lateral positioning at the bottom, so as to avoid the flow of hydraulic oil from affecting the position of the filter element 13 and further ensure the effect of hydraulic oil filtration.

[0036] Example 4: A baffle 8 with both ends fixedly installed on the inner side of the filter cartridge 11 is provided between the filter element 13 and the filter cylinder 11, and the baffle 8 is directly opposite the outlet of the branch oil pipeline.

[0037] By setting baffle 8, the hydraulic oil will impact the baffle 8 first when it is impacted, avoiding direct contact with the filter element 13 and improving the uniformity of filtration.

[0038] Example 5: The oil outlet pipe 12 is bent at an angle of less than 90 degrees.

[0039] To prevent hydraulic oil from directly impacting the bottom of the hydraulic oil tank, the oil outlet pipe 12 is designed with a bent structure, which can effectively reduce the direct impact of oil on the bottom of the tank and prevent impurities from rising from the bottom of the tank.

[0040] Example 6: A bypass opening valve is also provided inside the filter cartridge 11. When the filter element 13 is blocked and the back pressure of the return oil reaches the set pressure of the bypass opening valve, the pressure is released through the bypass opening valve.

[0041] To protect the filter and hydraulic system, when the filter element 13 is clogged, the bypass opening valve can release pressure in time to ensure the safety of the filter assembly 1.

[0042] Example 7: The filter assembly 1 is configured with three parts and two main oil inlet pipes, including a first main oil inlet pipe 9 and a second main oil inlet pipe 10, which respectively supply hydraulic oil to the lifting system and the braking system. The two filter assemblies 1 share the first main oil inlet pipe 9 and are respectively supplied to a single filter assembly 1 by a branch oil inlet pipe 3. The other filter assembly 1 is connected to the second main oil inlet pipe 10 through the branch oil inlet pipe 3.

[0043] In order to achieve better filtration effect, different numbers of filter components 1 are set according to different hydraulic system oil quantities to provide hydraulic oil filtration for the system, so that filter components 1 can provide optimal filtration effect.

[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic oil tank filter device for a mine dump truck, characterized by: The system includes at least one filter assembly (1) installed inside a hydraulic oil tank. The filter assembly (1) includes a filter cylinder (11) whose upper end is fixedly connected to the upper end of the inner side of the hydraulic oil tank. The lower end of the filter cylinder (11) is provided with an oil outlet pipe (12) that communicates with the hydraulic oil tank. A hollow filter element (13) is installed inside the filter cylinder (11). The filter element (13) is fitted above the oil outlet pipe (12). It also includes a main oil inlet pipe that is fixedly connected to the inner side plate of the hydraulic oil tank. One end of the main oil inlet pipe is fixedly connected to the steel pipe flange (2) for inputting the return hydraulic oil, and the other end is connected to the filter cylinder (11) through the branch oil inlet pipe (3).

2. The hydraulic oil tank filter device for a mining dump truck according to claim 1, characterized in that: The filter cartridge (11) is welded and fixed to the hydraulic oil tank by a plate (4) arranged around the upper edge of the filter cartridge (11). A cover plate (5) is provided on the outside of the hydraulic oil tank at the position corresponding to the filter cartridge (11). The cover plate (5) is installed on the outside of the hydraulic oil tank by a flange. The upper end of the filter element (13) is sealed, and the lower end is connected to the hydraulic oil tank through the oil outlet pipe (12). A compression spring (6) is provided between the sealing side and the cover plate (5). When the cover plate (5) is closed, the compression spring (6) is in a compressed state. The end of the compression spring (6) near the filter element (13) is fixedly connected to the upper sealing side of the filter element (13).

3. The hydraulic oil tank filter device for a mining dump truck according to claim 2, characterized in that: At the connection between the lower inner end of the filter cartridge (11) and the oil outlet pipe (12), there is an annular positioning boss (7) surrounding the outer side of the oil outlet pipe (12), and the filter element (13) is fastened to the outer edge of the positioning boss (7).

4. The hydraulic oil tank filter device for a mining dump truck according to claim 1, characterized in that: A baffle (8) with both ends fixedly installed inside the filter cartridge (11) is provided between the filter element (13) and the filter cylinder (11), and the baffle (8) is directly opposite the outlet of the branch oil pipeline.

5. The hydraulic oil tank filter device for a mining dump truck according to claim 1, characterized in that: The oil outlet pipe (12) is bent at an angle of less than 90 degrees.

6. The hydraulic oil tank filter device for a mining dump truck according to claim 1, characterized in that: The filter cartridge (11) is also equipped with a bypass opening valve. When the filter element (13) is blocked and the back pressure of the return oil reaches the set pressure of the bypass opening valve, the pressure is released through the bypass opening valve.

7. The hydraulic oil tank filter device for a mining dump truck according to claim 1, characterized in that: The filter assembly (1) is configured as three, and the main oil inlet pipe is configured as two, including the first main oil inlet pipe (9) and the second main oil inlet pipe (10), which respectively transport hydraulic oil for the lifting system and the braking system. The two filter assemblies (1) share the first main oil inlet pipe (9) and are respectively transported to a single filter assembly (1) by the branch oil inlet pipe (3). The other filter assembly (1) is connected to the second main oil inlet pipe (10) through the branch oil inlet pipe (3).

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