An engineering hydraulic oil tank

Abstract

This application discloses an engineering hydraulic oil tank, comprising: a tank body, equipped with a return oil pipe, an annular boss fixed to the inner wall of the return oil pipe, and a bypass hole vertically penetrating the annular boss; an end cap, detachably connected to the upper end of the return oil pipe, and equipped with a vertically penetrating first flow channel; a filter, including a filter part and a suspension part, the filter part being inserted into the inner side of the annular boss and matching the inner contour dimensions of the annular boss, the upper end of the filter part having an oil inlet, the suspension part being fixed to the filter part and equipped with a vertically penetrating second flow channel, the upper end of the second flow channel extending into the first flow channel and the lower end connecting to the oil inlet, the suspension part overlapping the annular boss and sealing the bypass hole, the second flow channel being equipped with a horizontally outwardly extending bypass groove, the lower end of the bypass groove being open and the upper end being closed, the bypass groove and the bypass hole being horizontally staggered; and an elastic part for applying a downward elastic force to the suspension part. This application can achieve an emergency bypass function while making filter maintenance convenient.

Description

Technical Field

[0001] This application relates to the field of hydraulic tank technology, and in particular to an engineering hydraulic tank. Background Technology

[0002] When the hydraulic system of construction machinery is working, the return oil carries various impurities generated by the operation of pipelines and valves. To prevent these impurities from entering the hydraulic oil tank, return oil lines are equipped with return oil filters. Conventional return oil filters integrate a filtration structure and an emergency bypass structure (such as a bypass valve). When the filter structure becomes clogged, the oil can flow back to the oil tank through the bypass structure, ensuring the normal conduction of the return oil pipeline. However, this type of structure has significant drawbacks in practical use: when replacing or maintaining the filter structure, the bypass component must be disassembled first to remove the filter structure, making the overall operation process complex and inefficient. Therefore, there is an urgent need for a hydraulic oil tank that facilitates filter structure maintenance while also providing an emergency bypass function. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an engineering hydraulic oil tank that enables emergency bypass functionality while providing convenient filter maintenance.

[0004] The engineering hydraulic oil tank according to an embodiment of this application includes: The housing has a vertically penetrating oil return pipe at the top. The inner wall of the oil return pipe is fixed with an annular boss extending circumferentially thereon, and a bypass hole is vertically penetrating the annular boss. The end cap is detachably connected to the upper end of the return oil pipe and is provided with a vertically penetrating first flow channel; A filter includes a filter section and a suspension section. The filter section is inserted into the inner side of the annular boss and matches the inner contour size of the annular boss. The upper end of the filter section has an oil inlet. The suspension section is fixed to the upper end of the filter section and is provided with a vertically penetrating second flow channel. The upper end of the second flow channel extends into the first flow channel and the lower end connects to the oil inlet. The suspension section overlaps the upper end face of the annular boss and closes the bypass hole. The side wall of the second flow channel is provided with a horizontally outwardly extending bypass groove. The lower end of the bypass groove is open and the upper end is closed. The bypass groove and the bypass hole are horizontally staggered. An elastic part is disposed between the end cap and the suspension part, and is used to apply a downward elastic force to the suspension part.

[0005] The engineering hydraulic oil tank according to the embodiments of this application has at least the following beneficial effects: By incorporating a suspension part that overlaps with the annular boss and can move up and down, a bypass groove on the suspension part, a bypass hole on the annular boss, and an elastic part between the end cover and the suspension part, the filter part can reliably close the bypass hole during normal operation and automatically open the bypass hole to achieve emergency oil return when the filter part is clogged. Furthermore, when the filter part needs to be replaced or maintained, the operator only needs to open the end cover to remove the filter upwards, making filter maintenance convenient.

[0006] According to some embodiments of this application, the lower end face of the end cap is provided with a vertically extending guide post, and the elastic part is configured as a compression spring and sleeved on the guide post.

[0007] According to some embodiments of this application, a guide hole is vertically provided on the suspension part, and the guide post passes through the guide hole.

[0008] According to some embodiments of this application, the engineering hydraulic oil tank further includes: A position detection unit is disposed between the return oil pipe and the suspension part, and is used to detect the vertical position of the suspension part relative to the return oil pipe.

[0009] According to some embodiments of this application, the position detection unit includes: A magnetic switch is fixed to the outer wall of the return oil pipe; A magnetic component is fixed to the suspension part and adjacent to the inner wall of the return oil pipe; The suspension part can move upwards to align the magnetic component with the magnetic switch horizontally.

[0010] According to some embodiments of this application, the end cap is provided with a vertically extending input tube, and the first flow channel is formed in the input tube; wherein, the suspension part can move upward to abut the lower end of the input tube, and when the suspension part abuts the input tube, the magnetic element is horizontally aligned with the magnetic switch.

[0011] According to some embodiments of this application, the suspension portion is provided with a vertically extending sealing tube, the sealing tube extending into the input tube and fitting against the inner wall of the input tube, and the second flow channel portion is formed in the sealing tube.

[0012] According to some embodiments of this application, the elastic portion and the bypass groove are respectively evenly spaced multiple times along the circumference of the return oil pipe.

[0013] According to some embodiments of this application, multiple bypass holes are evenly spaced along the circumference of the return oil pipe.

[0014] According to some embodiments of this application, the upper end of the return oil pipe is provided with an outwardly extending connecting flange, the upper end face of the connecting flange is provided with an annular groove and a sealing ring is installed, and the end cap is connected to the connecting flange by fasteners and abuts against the upper end face of the connecting flange.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the overall structure of the engineering hydraulic oil tank according to an embodiment of this application; Figure 2 This is a schematic diagram of the state when the suspension part abuts against the lower end of the input pipe according to an embodiment of this application; Figure 3 This is a schematic diagram of the state when the suspension part overlaps the annular boss according to an embodiment of this application; Figure 4 This is an exploded view of the structure of the return oil pipe, end cap, and filter according to an embodiment of this application.

[0017] Icon labels: Box 100; Oil return pipe 200, annular boss 201, bypass hole 202, connecting flange 203, sealing ring 204; End cap 300, first flow channel 301, guide post 302, input pipe 303; Filter 400, filter section 410, suspension section 420, second flow channel 421, bypass groove 422, guide hole 423, sealing tube 424, annular body 425; Elastic part 500; Magnetic switch 600, magnetic component 610. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0020] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0021] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 4 As shown, an engineering hydraulic oil tank according to an embodiment of this application includes: a tank body 100, an end cap 300, a filter 400, and an elastic part 500.

[0023] The housing 100 is the main structure of the engineering hydraulic oil tank, and its interior is used to store hydraulic oil. A vertically penetrating return oil pipe 200 is provided at the upper end of the housing 100, which guides the hydraulic system return oil into the housing 100. An annular boss 201 extending circumferentially is fixed to the inner wall of the return oil pipe 200, and a bypass hole 202 is vertically penetrating the annular boss 201.

[0024] The end cap 300 is detachably connected to the upper end of the return oil pipe 200 to close the upper opening of the return oil pipe 200. The end cap 300 is provided with a vertically penetrating first flow channel 301 through which the oil flows back to the return oil pipe 200 and then back to the inside of the housing 100.

[0025] The filter 400 includes a filter section 410 and a suspension section 420. The filter section 410 is inserted inside the annular boss 201 and matches the inner contour size of the annular boss 201. It is used to filter out impurities in the oil. The upper end of the filter section 410 has an oil inlet. The oil in the return oil pipe 200 enters the filter section 410 from the oil inlet and flows to the housing 100 after filtration. The suspension part 420 is fixed to the upper end of the filter part 410 and is provided with a vertically penetrating second flow channel 421. The upper end of the second flow channel 421 extends into the first flow channel 301 and the lower end connects to the oil inlet. The suspension part 420 overlaps the upper end face of the annular boss 201, thereby suspending and supporting the entire filter 400 on the annular boss 201. At the same time, the suspension part 420 closes the bypass hole 202 opened on the annular boss 201 to ensure that the oil will not flow back directly to the housing 100 from the bypass hole 202 under normal conditions. The side wall of the second flow channel 421 is provided with a horizontally outwardly extending bypass groove 422. The bypass groove 422 is located below the first flow channel 301 and above the annular boss 201. The lower end of the bypass groove 422 is open and the upper end is closed. The bypass groove 422 and the bypass hole 202 are staggered in the horizontal direction, that is, they are not at the same angle position and are not connected under normal conditions.

[0026] The elastic part 500 is disposed between the end cap 300 and the suspension part 420, and is used to apply a downward elastic force to the suspension part 420.

[0027] It should be noted that the filter 400 can move upward relative to the return oil pipe 200 under the action of external force, and after the end cap 300 is opened, the filter 400 can be pulled upward away from the return oil pipe 200.

[0028] In this embodiment, under normal filtration conditions, the elastic part 500 presses the suspension part 420 against the upper end face of the annular boss 201, so that the suspension part 420 reliably seals the bypass hole 202, and the oil flows back to the inside of the housing 100 through the first flow channel 301, the second flow channel 421 and the filter part 410. When the filter section 410 becomes clogged, the oil continues to enter the first flow channel 301 and then the second flow channel 421. At this time, the oil cannot smoothly enter the filter section 410, but is squeezed into the bypass groove 422, causing the oil pressure in the bypass groove 422 to rise rapidly. This pressure acts on the top wall of the bypass groove 422, forming an upward hydraulic pressure. When this hydraulic pressure overcomes the downward elastic force applied by the elastic part 500, the suspension part 420 and the filter section 410 are lifted upward together, causing the suspension part 420 to leave the upper end face of the annular boss 201. The bypass hole 202 is opened, and the oil flows directly back to the housing 100 through the bypass hole 202, realizing the emergency bypass function.

[0029] The engineering hydraulic oil tank of this application embodiment is provided with a suspension part 420 that overlaps with the annular boss 201 and can move up and down, a bypass groove 422 opened on the suspension part 420, a bypass hole 202 opened on the annular boss 201, and an elastic part 500 provided between the end cover 300 and the suspension part 420. This allows the filter part 410 to reliably close the bypass hole 202 during normal operation, and to automatically open the bypass hole 202 to achieve emergency oil return when the filter part 410 is blocked. Moreover, when the filter part 410 needs to be replaced or maintained, the operator only needs to open the end cover 300 to remove the filter 400 upwards, making the maintenance of the filter 400 convenient.

[0030] Reference Figure 4 As shown, in some embodiments of this application, the filter section 410 is configured as a cylindrical structure, which defines a filter chamber inside. The top of the filter chamber is open to form an oil inlet, and a plurality of filter holes are provided on the periphery of the filter chamber.

[0031] Reference Figure 3 As shown, in some embodiments of this application, a vertically extending guide post 302 is provided on the lower end face of the end cap 300, and the elastic part 500 is configured as a compression spring, which is sleeved on the guide post 302. Both the compression spring and the guide post 302 are located on the outer periphery of the first flow channel 301. In this embodiment, the guide post 302 can prevent the compression spring from bending or shifting laterally during compression and rebound, ensuring that the elastic force always acts on the suspension part 420 in the vertical direction, thereby improving structural stability.

[0032] Reference Figure 3 and Figure 4 As shown, in some embodiments of this application, a guide hole 423 is vertically provided through the suspension part 420. The guide hole 423 is horizontally offset from the bypass hole 202 on the annular boss 201 and is located on the outer periphery of the first flow channel 301. The guide post 302 passes through the guide hole 423 and is fitted with it with a clearance. With this arrangement, the compression spring can be completely sleeved on the guide post 302. The guide post 302 can not only provide a stable guide and mounting base for the compression spring, but also prevent the suspension part 420 from circumferentially deflecting, thus avoiding the bypass groove 422 on the suspension part 420 from communicating with the bypass hole 202 on the annular boss 201 under normal conditions.

[0033] Reference Figures 1 to 4 As shown, in some embodiments of this application, in order to ensure that the elastic force is evenly distributed in the circumferential direction, a plurality of elastic portions 500 are evenly spaced along the circumference of the return oil pipe 200; similarly, in order to ensure that the force applied by the hydraulic oil to the upward-facing suspension part 420 during emergency bypass is more balanced, a plurality of bypass grooves 422 are also evenly spaced along the circumference of the return oil pipe 200. In addition, the guide post 302, the guide hole 423 and the elastic portion 500 are provided in a one-to-one correspondence.

[0034] Reference Figure 2 and Figure 3 As shown, in some embodiments of this application, multiple bypass holes 202 are evenly spaced along the circumference of the return oil pipe 200, thereby providing sufficient flow when the suspension part 420 rises to open the bypass, so as to ensure that the oil smoothly enters the tank 100.

[0035] Reference Figure 1 and Figure 2 As shown, in some embodiments of this application, the engineering hydraulic oil tank further includes a position detection unit, which is disposed between the return oil pipe 200 and the suspension part 420, and is used to detect the vertical position of the suspension part 420 relative to the return oil pipe 200. By monitoring whether the suspension part 420 has an upward movement, it can be determined whether the filter part 410 is blocked, and an alarm signal can be issued in time when a blockage occurs to remind the operator to perform maintenance and avoid equipment damage.

[0036] In some specific embodiments of this application, reference is made to Figure 1 and Figure 2 As shown, the position detection unit includes a magnetic switch 600 and a magnetic component 610. The magnetic switch 600 is fixed to the outer wall of the return oil pipe 200, and the magnetic component 610 is fixed to the suspension part 420 and adjacent to the inner wall of the return oil pipe 200. The suspension part 420 can move upwards to make the magnetic component 610 and the magnetic switch 600 horizontally aligned. In this embodiment, when the suspension part 420 is in its normal lower position, the magnetic component 610 and the magnetic switch 600 are vertically offset, and the magnetic switch 600 is in an open state. When the suspension part 420 moves upwards to a certain height due to blockage of the filter part 410, the magnetic component 610 and the magnetic switch 600 are horizontally aligned, and the magnetic field of the magnetic component 610 triggers the magnetic switch 600 to close, thereby outputting a blockage signal.

[0037] To improve detection reliability, multiple sets of position detection units can be configured, distributed circumferentially along the return oil pipe 200. When the suspension part 420 rises, a blockage is only confirmed when all magnetic switches 600 are triggered, thus avoiding false signals caused by mis-triggering; alternatively, a warning signal can be issued when any set of magnetic switches 600 is triggered, providing redundant detection. The specific logic adopted can be set according to actual control requirements.

[0038] In some embodiments of this application, the magnetic element 610 is configured as a permanent magnet, such as a neodymium magnet or a ferrite magnet, and its shape can be cylindrical, blocky or ring-shaped.

[0039] In some embodiments of this application, the magnetic switch 600 may be configured as a reed switch or a Hall switch.

[0040] Reference Figures 1 to 4 As shown, in some embodiments of this application, a vertically extending input pipe 303 is provided on the end cap 300. The lower end of the input pipe 303 opens towards the interior of the return oil pipe 200, and the first flow channel 301 is formed in the internal channel of the input pipe 303. A gap is left between the outer wall of the input pipe 303 and the inner wall of the return oil pipe 200 to provide installation space for the guide post 302, the elastic part 500, etc. The suspension part 420 can move upward to abut the lower end of the input pipe 303 under the action of external force (such as the hydraulic pressure generated when blocked). The lower end of the input pipe 303 plays an upward limiting role for the suspension part 420. At the same time, when the suspension part 420 just abuts the lower end of the input pipe 303 (e.g., when the lower end of the input pipe 303 is just abutted), the suspension part 420 can move upward to abut the lower end of the input pipe 303. Figure 2 As shown, the magnetic component 610 fixed to the suspension part 420 and the magnetic switch 600 fixed to the outer wall of the return oil pipe 200 are aligned horizontally. At this time, the magnetic switch 600 is triggered, and a blockage alarm signal is issued. By reasonably designing the height position of the lower end of the input pipe 303, the timing of the alarm triggering can be precisely controlled to ensure that the alarm is issued at or before the suspension part 420 rises to the point where the bypass hole 202 is fully open, reminding the operator to replace the filter 400 in time.

[0041] Reference Figures 1 to 4 As shown, in some embodiments of this application, the suspension part 420 is provided with an annular body 425 and a sealing tube 424. The annular body 425 is fixed to the upper end of the filter part 410 and overlaps the annular boss 201. The annular body 425 is located below the input tube 303 and has a vertical gap with it. The bypass groove 422 and the guide hole 423 are both provided on the annular body 425. The sealing tube 424 is fixed to the center of the annular body 425 and extends vertically. The outer diameter of the sealing tube 424 matches the inner diameter of the input tube 303. The sealing tube 424 extends into the input tube 303, and its outer peripheral wall fits against the inner peripheral wall of the input tube 303 to form a relatively sliding sealing fit. The upper part of the second flow channel 421 is formed in the internal channel of the sealing tube 424, and the lower part of the second flow channel 421 is formed inside the annular body 425.

[0042] In this embodiment, by providing a sealing pipe 424, it is possible to prevent oil from leaking from the junction of the second flow channel 421 and the first flow channel 301 into the space above the annular body 425 when the filter section 410 becomes clogged, thus preventing the suspension section 420 from being unable to move upward due to downward pressure.

[0043] Reference Figure 1As shown, in some embodiments of this application, the upper end of the return oil pipe 200 is provided with an outwardly extending connecting flange 203. The upper end face of the connecting flange 203 is provided with an annular groove and a sealing ring 204 is installed therein. The end cap 300 is connected to the connecting flange 203 by fasteners (such as bolts) and abuts against the upper end face of the connecting flange 203, while compressing the sealing ring 204 to achieve a reliable seal between the end cap 300 and the return oil pipe 200. This flange connection structure is easy to disassemble and assemble, and the seal is reliable.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine different embodiments or examples described in this specification.

[0045] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An engineering hydraulic oil tank, characterized in that, include: The housing has a vertically penetrating oil return pipe at the top. The inner wall of the oil return pipe is fixed with an annular boss extending circumferentially thereon, and a bypass hole is vertically penetrating the annular boss. The end cap is detachably connected to the upper end of the return oil pipe and is provided with a vertically penetrating first flow channel; A filter includes a filter section and a suspension section. The filter section is inserted into the inner side of the annular boss and matches the inner contour size of the annular boss. The upper end of the filter section has an oil inlet. The suspension section is fixed to the upper end of the filter section and is provided with a vertically penetrating second flow channel. The upper end of the second flow channel extends into the first flow channel and the lower end connects to the oil inlet. The suspension section overlaps the upper end face of the annular boss and closes the bypass hole. The side wall of the second flow channel is provided with a horizontally outwardly extending bypass groove. The lower end of the bypass groove is open and the upper end is closed. The bypass groove and the bypass hole are horizontally staggered. An elastic part is disposed between the end cap and the suspension part, and is used to apply a downward elastic force to the suspension part.

2. The engineering hydraulic oil tank according to claim 1, characterized in that, The lower end face of the end cap is provided with a vertically extending guide post, and the elastic part is a compression spring and is sleeved on the guide post.

3. The engineering hydraulic oil tank according to claim 2, characterized in that, A guide hole is vertically provided on the suspension part, and the guide post passes through the guide hole.

4. The engineering hydraulic oil tank according to claim 1, characterized in that, The engineering hydraulic oil tank also includes: A position detection unit is disposed between the return oil pipe and the suspension part, and is used to detect the vertical position of the suspension part relative to the return oil pipe.

5. The engineering hydraulic oil tank according to claim 4, characterized in that, The position detection unit includes: A magnetic switch is fixed to the outer wall of the return oil pipe; A magnetic component is fixed to the suspension part and adjacent to the inner wall of the return oil pipe; The suspension part can move upwards to align the magnetic component with the magnetic switch horizontally.

6. The engineering hydraulic oil tank according to claim 5, characterized in that, The end cap is provided with a vertically extending input tube, and the first flow channel is formed in the input tube; wherein, the suspension part can move upward to abut the lower end of the input tube, and when the suspension part abuts the input tube, the magnetic element is horizontally aligned with the magnetic switch.

7. The engineering hydraulic oil tank according to claim 6, characterized in that, The suspension part is provided with a vertically extending sealing tube, which extends into the input tube and fits against the inner wall of the input tube. The second flow channel portion is formed in the sealing tube.

8. The engineering hydraulic oil tank according to claim 1, characterized in that, Along the circumference of the return oil pipe, the elastic part and the bypass groove are respectively evenly spaced in multiples.

9. The engineering hydraulic oil tank according to claim 1, characterized in that, Multiple bypass holes are evenly spaced along the circumference of the return oil pipe.

10. The engineering hydraulic oil tank according to claim 1, characterized in that, The upper end of the return oil pipe is provided with an outwardly extending connecting flange. The upper end face of the connecting flange is provided with an annular groove and a sealing ring is installed. The end cap is connected to the connecting flange by fasteners and abuts against the upper end face of the connecting flange.

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