Oil return tank assembly, hydraulic oil tank and engineering equipment

Abstract

The utility model provides an oil return tank assembly, a hydraulic oil tank and engineering equipment. The oil return tank assembly comprises an oil return tank with a closed inner cavity, a supporting column penetrating through the oil return tank, a supporting sealing plate spaced from the oil return tank, a plurality of main oil return cavity pipes with first pipe diameters and a plurality of oil outlet pipes with second pipe diameters. A plurality of main oil return cavity pipes penetrate through the oil return tank and are evenly distributed around the supporting column in the circumferential direction, one ends extend out of the upper surface of the oil return tank, and the other ends extend out of the lower surface of the oil return tank and are connected with the upper surface of the supporting sealing plate. The main oil return cavity pipe is communicated with the closed inner cavity of the oil return tank; the oil outlet pipes correspond to the main oil return cavity pipes one to one, are arranged on the lower surface of the supporting sealing plate and communicate with the corresponding main oil return cavity pipes. Stress concentration can be reduced, and the reliability of the hydraulic oil tank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, in particular to an oil return tank assembly, a hydraulic oil tank and an engineering equipment. Background Technique

[0002] The hydraulic oil tank plays an important role in the hydraulic system. The hydraulic oil tank not only stores the hydraulic oil required for the operation of the hydraulic system, but also undertakes key functions such as heat dissipation, separation of air bubbles in the oil, and precipitation of impurities. Therefore, it is necessary to ensure the stable operation and efficient work of the hydraulic system. A return oil tank assembly is usually arranged in the hydraulic oil tank. In the prior art, the return oil tank assembly connects and supports the upper panel of the return oil cavity and the lower panel of the return oil through support rib plates. The support rib plates are connected to the return oil cavity in a welding form. The hydraulic oil in the return oil cavity has a certain back pressure, and stress concentration is easy to form at the welding corner. After the engineering equipment (excavator) works for a certain period of time, oil leakage and cracking are likely to occur at the welding stress concentration, thus affecting the performance of the entire hydraulic oil tank.

[0003] Therefore, there is an urgent need for an oil return tank assembly, a hydraulic oil tank and an engineering equipment that can reduce stress concentration and improve the reliability of the hydraulic oil tank. Summary of the Invention

[0004] The purpose of the utility model is to provide an oil return tank assembly, a hydraulic oil tank and an engineering equipment, aiming to solve the technical problem that the traditional hydraulic oil tank structure is prone to stress concentration and has low reliability.

[0005] To achieve the above purpose, in the first aspect, the utility model provides an oil return tank assembly, including:

[0006] An oil return tank with a closed inner cavity, a support column passing through the oil return tank, a support sealing plate arranged at an interval from the oil return tank, and a plurality of main oil return cavity pipes with a first pipe diameter and a plurality of oil outlet pipes with a second pipe diameter;

[0007] A plurality of the main oil return cavity pipes respectively pass through the oil return tank and are circumferentially and uniformly arranged around the support column, one end extends out of the upper surface of the oil return tank, and the other end extends out of the lower surface of the oil return tank and is connected to the upper surface of the support sealing plate; and the main oil return cavity pipe is communicated with the closed inner cavity of the oil return tank;

[0008] The oil outlet pipes are arranged in one-to-one correspondence with the main oil return cavity pipes, are respectively arranged on the lower surface of the support sealing plate and are communicated with the corresponding main oil return cavity pipes.

[0009] As a further improvement of the above solution, both ends of the support column respectively extend out of the upper surface and the lower surface of the oil return tank; and the outer walls of the two extending ends are respectively welded to the upper surface or the lower surface of the oil return tank to form an integral body.

[0010] As a further improvement of the above solution, the support column is made of seamless steel pipe.

[0011] As a further improvement of the above solution, the first pipe diameter is greater than the second pipe diameter.

[0012] As a further improvement of the above solution, a plurality of oil return filter element connecting pipes are provided on the support sealing plate, and the oil return filter element connecting pipes are correspondingly arranged at the docking position of the main oil return cavity pipe and the oil outlet pipe, with one end communicating with the main oil return cavity pipe and the other end communicating with the oil outlet pipe.

[0013] As a further improvement of the above solution, a first oil return pipe is provided on the first side surface of the oil return tank, and a second oil return pipe is provided on the second side surface adjacent to the first side surface; and the first oil return pipe and the second oil return pipe respectively communicate with the closed inner cavity.

[0014] As a further improvement of the above solution, an oil return flange is provided at one end of the main oil return cavity pipe extending out of the oil return tank; an oil outlet pipe sealing plate is provided at the end of the oil outlet pipe away from the support sealing plate.

[0015] As a further improvement of the above solution, the oil return tank is a box body with a square cross-section, and the center line of the support column coincides with the center line of the oil return tank.

[0016] In a second aspect, the present utility model further provides a hydraulic oil tank, including a tank body and a kind of oil return tank assembly provided in the tank body as provided in the first aspect;

[0017] Waist-shaped holes corresponding to the first oil return pipe and / or the second oil return pipe are provided on the tank body; one end of the main oil return cavity pipe of the oil return tank assembly extends out of the oil return tank and is connected to the top of the tank body.

[0018] In a third aspect, the present utility model further provides an engineering equipment, including a kind of hydraulic oil tank provided in the second aspect.

[0019] Since the present utility model adopts the above technical solutions, the beneficial effects of the present application are as follows:

[0020] 1. The present utility model provides an oil return tank assembly, comprising: an oil return tank with a closed inner cavity, a support column passing through the oil return tank, a support sealing plate spaced from the oil return tank, a plurality of main oil return cavity pipes with a first pipe diameter, and a plurality of oil outlet pipes with a second pipe diameter; the plurality of main oil return cavity pipes respectively pass through the oil return tank and are circumferentially and evenly arranged around the support column, one end extending out of the upper surface of the oil return tank, and the other end extending out of the lower surface of the oil return tank and connecting to the upper surface of the support sealing plate; and the main oil return cavity pipes communicate with the closed inner cavity of the oil return tank; the oil outlet pipes are arranged in one-to-one correspondence with the main oil return cavity pipes, respectively arranged on the lower surface of the support sealing plate and communicating with the corresponding main oil return cavity pipes; in the oil return tank assembly provided by the present utility model, by providing a support column and the support column passing through the oil return tank, such a setting only requires welding the outer wall of the support column to the upper and lower surfaces of the oil return tank, that is, only two welds are needed to complete the connection of the support column for support and reinforcement. Compared with the traditional oil return tank assembly, setting support rib plates in the oil return tank can greatly reduce the number of welds. For example, setting one support rib plate in the oil return tank requires 4 welds, and usually at least 3 support rib plates are needed, which means at least 12 welds. The more welds there are, the easier it is to generate welding deformation during welding; while the present utility model adopts the setting of a support column, which can greatly reduce the number of welds, thus avoiding the influence of welding deformation on the oil return cavity; in addition, the main oil return cavity pipes pass through the oil return tank and are circumferentially and evenly arranged around the support column, so that the support column, the oil return tank and the main oil return cavity pipes are connected into a whole, which can enhance the strength of the oil return tank and simplify the welding process, thereby reducing the processing cost; furthermore, in the present utility model, the main oil return cavity pipes and the oil outlet pipes are arranged in one-to-one correspondence and connected into a whole through a support sealing plate, so that each main oil return cavity pipe and / or oil outlet pipe pulls each other, which can effectively solve the problem that the lower half of the oil return tank assembly does not need to be fixed on the inner wall of the tank body, and at the same time, it will not shake in the tank body due to the too long oil outlet pipe, greatly enhancing the stability of the oil return tank assembly in the hydraulic oil tank.

[0021] 2. The present utility model also provides a hydraulic oil tank, comprising a tank body and an oil return tank assembly as provided in the first aspect arranged in the tank body; the tank body is provided with kidney-shaped holes corresponding to the installation of the first oil return pipe and / or the second oil return pipe, and one end of the main oil return cavity pipe of the oil return tank assembly extends out of the oil return tank and connects to the top of the tank body; in the present utility model, by providing kidney-shaped holes on the side of the tank body for the corresponding installation of the first oil return pipe and / or the second oil return pipe, the problem of the decrease in the strength and quality of the tank body caused by different welding sequences can be avoided; welding the oil return tank assembly on the tank body also improves the overall strength of the hydraulic oil tank and makes the hydraulic oil tank safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative work, other drawings can also be obtained based on the structures shown in these drawings.

[0023] Figure 1 It is a three-dimensional schematic diagram of a return oil tank assembly disclosed by the present utility model;

[0024] Figure 2 It is a sectional view schematic of a return oil tank assembly disclosed by the present utility model Figure 1 ;

[0025] Figure 3 It is a partial sectional view schematic of a return oil tank assembly disclosed by the present utility model Figure 2 ;

[0026] Figure 4 It is a three-dimensional schematic diagram of a hydraulic oil tank (removing the top plate) disclosed by the present utility model;

[0027] Figure 5 It is a three-dimensional schematic diagram of a hydraulic oil tank disclosed by the present utility model.

[0028] Reference numerals:

[0029] 1. Return oil tank assembly; 11. Return oil tank; 12. Support column; 13. Support sealing plate; 14. Main return oil cavity pipe; 15. Outlet pipe; 16. Return oil filter element connection pipe; 17. First return oil pipe; 18. Second return oil pipe; 19. Return oil flange; 20. Outlet pipe sealing plate; 2. Oil tank body; 21. Kidney-shaped hole.

[0030] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 work fall within the scope of protection of the present utility model.

[0032] It should be noted that all the directional indications (such as up, down...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0034] Moreover, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. Embodiment 1

[0035] Refer to Figures 1-3 , the present utility model provides an oil return tank assembly 1, including:

[0036] An oil return tank 11 with a closed inner cavity, a support column 12 passing through the oil return tank 11, a support sealing plate 13 spaced from the oil return tank 11, several main oil return cavity pipes 14 with a first pipe diameter, and several oil outlet pipes 15 with a second pipe diameter; specifically, both ends of the support column 12 respectively extend out of the upper surface and the lower surface of the oil return tank 11; and the outer walls of the two extended ends are respectively welded to the upper surface or the lower surface of the oil return tank 11 to form an integral body; in this embodiment, the support column 12 is made of seamless steel pipe, and only a seamless steel pipe with a preset length needs to be intercepted, and the material is convenient to obtain;

[0037] Several of the main oil return cavity pipes 14 respectively pass through the oil return tank 11 and are circumferentially and evenly arranged around the support column 12, one end extending out of the upper surface of the oil return tank 11, and the other end extending out of the lower surface of the oil return tank 11 and connecting to the upper surface of the support sealing plate 13; and the main oil return cavity pipes 14 communicate with the closed inner cavity of the oil return tank 11;

[0038] The oil outlet pipes 15 are arranged in one-to-one correspondence with the main oil return cavity pipes 14, are respectively arranged on the lower surface of the support sealing plate 13 and communicate with the corresponding main oil return cavity pipes 14;

[0039] In the oil return tank assembly 1 provided by the present utility model, by providing support columns 12, and the support columns 12 passing through the oil return tank 11, only the outer wall of the support columns 12 needs to be welded to the upper and lower surfaces of the oil return tank 11, that is, only two weld seams are required to complete the connection of the support columns for support and reinforcement. Compared with the traditional oil return tank assembly 1, by providing support rib plates in the oil return tank 11, the number of weld seams can be greatly reduced. For example, when providing one support rib plate in the oil return tank 11, 4 weld seams are required, and usually at least 3 support rib plates are needed, which means at least 12 weld seams. The more weld seams there are, the more likely welding deformation will occur during welding. However, the present utility model adopts the arrangement of support columns, which can greatly reduce the number of weld seams, thereby avoiding the influence of welding deformation on the oil return cavity. In addition, the main oil return cavity pipe 14 passes through the oil return tank 11 and is circumferentially evenly arranged around the support column 12, so that the support column, the oil return tank 11, and the main oil return cavity pipe 14 are connected into a whole, which can enhance the strength of the oil return tank 11 and simplify the welding process, thereby reducing the processing cost. Moreover, in the present utility model, the main oil return cavity pipes 14 and the oil outlet pipes 15 are in one-to-one correspondence and are connected into one body through the support sealing plates 13, so that each main oil return cavity pipe 14 and / or oil outlet pipe 15 pulls each other, which can effectively solve the problem that the lower half of the oil return tank assembly 1 does not need to be fixed on the inner wall of the tank body, and at the same time, it will not shake in the tank body due to the too long oil outlet pipe 15, greatly enhancing the stability of the oil return tank assembly 1 in the hydraulic oil tank.

[0040] As a preferred embodiment, the first pipe diameter is greater than the second pipe diameter; specifically, in ultra-large engineering equipment, the corresponding hydraulic oil tank size is also large; taking the hydraulic oil tank of an ultra-large excavator as an example for illustration, the hydraulic oil tank suitable for an ultra-large excavator has a relatively large size, resulting in the sizes of the main oil return cavity pipes 14 and the oil outlet pipes 15 of the oil return tank assembly 1 being nearly 500 mm. The oil return tank assembly 1 of the hydraulic oil tank of an ultra-large excavator usually has one or two main oil return cavity pipes 14. However, in order to overcome the problem that it is inconvenient to weld the support sealing plates 13 in the hydraulic oil tank, and if not welded, there will be a shaking problem. In the present utility model, the first pipe diameter of the main oil return cavity pipes 14 is reduced, and at the same time, the number of them is increased. In this embodiment, the number of the main oil return cavity pipes 14 is increased to 4, as Figure 1 and Figure 2 shown; the 4 main oil return cavity pipes 14 and the 4 oil outlet pipes 15 are distributed up and down in space, welded to the support sealing plates 13, and the 4 main oil return cavity pipes 14 are circumferentially evenly arranged around the support column. Under the action of the weld seams, the 4 main oil return cavity pipes 14 pull each other, so that the lower half of the oil return tank assembly 1 does not need to be welded to the inner wall of the tank body, and is welded to the tank top plate through the oil return flange 19 at the top, so that the oil return tank assembly 1 is suspended in the tank body and will not shake.

[0041] As a preferred embodiment, a plurality of oil return filter element connection pipes 16 are provided on the support sealing plate 13, and the oil return filter element connection pipes 16 are correspondingly arranged at the docking position of the main oil return cavity pipe 14 and the oil outlet pipe 15, with one end communicating with the main oil return cavity pipe 14 and the other end communicating with the oil outlet pipe 15;

[0042] Specifically, through holes having the same number as the main oil return cavity pipes 14 are provided on the support sealing plate 13, and an oil return filter element connection pipe 16 is welded to each through hole. The arrangement of the oil return filter element connection pipes 16 enables the correspondingly arranged main oil return cavity pipes 14 and oil outlet pipes 15 to be in one-to-one correspondence and communication.

[0043] As a preferred embodiment, a first oil return pipe 17 is provided on the first side surface of the oil return tank 11, and a second oil return pipe 18 is provided on the second side surface adjacent to the first side surface; and the first oil return pipe 17 and the second oil return pipe 18 are respectively communicated with the closed inner cavity; specifically, in this embodiment, two first oil return pipes 17 are provided at intervals on the first side surface, and two second oil return pipes 18 are provided at intervals on the second side surface; and a patch plate is also attached to the first side surface for the two first oil return pipes 17 to pass through.

[0044] As a preferred embodiment, an oil return flange 19 is provided at one end of the main oil return cavity pipe 14 extending out of the oil return tank 11; an oil outlet pipe sealing plate 20 is provided at the end of the oil outlet pipe 15 away from the support sealing plate 13.

[0045] As a preferred embodiment, the oil return tank 11 is a box body with a square cross-section, and the center line of the support column 12 coincides with the center line of the oil return tank 11; specifically, the oil return tank 11 includes an oil return tank 11 top plate, an oil return tank 11 bottom plate arranged in parallel and spaced apart from the top of the oil return tank 11, and side enclosure plates arranged between the oil return tank 11 top plate and the oil return tank 11 bottom plate and enclosing the interval.

[0046] In this embodiment, both the oil return tank 11 top plate and the oil return tank 11 bottom plate are square plate bodies, and the first oil return pipe 17 and the second oil return pipe 18 are both arranged on different surfaces of the side enclosure plates;

[0047] With the arrangement of the box body with a square cross-section and the coincidence of the center line of the support column 12 and the center line of the oil return tank 11, the 4 main oil return cavity pipes 14 can be correspondingly arranged at the four corners of the square, making the oil return tank assembly 1 provided by the present utility model more stable and reliable in structure. Embodiment 2

[0048] See Figure 4 and Figure 5, the present utility model also provides a hydraulic oil tank, which includes a tank body 2 and a return oil tank assembly 1 as provided in Embodiment 1 disposed within the tank body 2;

[0049] The tank body 2 is provided with kidney-shaped holes 21 corresponding to the installation of the first return oil pipe 17 and / or the second return oil pipe 18; one end of the main return oil cavity pipe 14 of the return oil tank assembly 1 extends out of the return oil tank 11 and is connected to the top of the tank body 2;

[0050] The provision of the kidney-shaped holes 21 on the tank body 2 facilitates the installation of the return oil tank assembly 1 within the tank body 2 and enables the first return oil pipe 17 and / or the second return oil pipe to accurately align the empty positions for subsequent welding; such a setting can avoid the problem of the decrease in the strength and quality of the tank body 2 caused by different welding sequences; welding the return oil tank assembly 1 to the tank body also enhances the overall strength of the hydraulic oil tank, making the hydraulic oil tank safer. Embodiment 3

[0051] In a third aspect, the present utility model also provides a construction equipment, which includes a hydraulic oil tank as provided in Embodiment 2.

[0052] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A return oil tank assembly, characterized in that, Comprising: An oil return tank with a closed inner cavity, a support column passing through the oil return tank, a support sealing plate spaced from the oil return tank, a plurality of main oil return cavity pipes with a first pipe diameter, and a plurality of oil outlet pipes with a second pipe diameter; The plurality of main oil return cavity pipes respectively pass through the oil return tank and are circumferentially and uniformly arranged around the support column, one end extends out of the upper surface of the oil return tank, and the other end extends out of the lower surface of the oil return tank and is connected to the upper surface of the support sealing plate; and the main oil return cavity pipe is communicated with the closed inner cavity of the oil return tank; The oil outlet pipes are arranged in one-to-one correspondence with the main oil return cavity pipes, are respectively arranged on the lower surface of the support sealing plate and are communicated with the corresponding main oil return cavity pipes.

2. The fuel return tank assembly according to claim 1, characterized in that, Both ends of the support column respectively extend out of the upper surface and the lower surface of the oil return tank; and the outer walls of the two extended ends are respectively welded to the upper surface or the lower surface of the oil return tank integrally.

3. The oil return tank assembly according to claim 1 or 2, characterized in that, The support column is made of seamless steel pipe.

4. A fuel return tank assembly according to claim 1 or 2, characterized in that, The first pipe diameter is larger than the second pipe diameter.

5. A return oil tank assembly according to claim 1 or 2, characterized in that, A plurality of oil return filter element connecting pipes are arranged on the support sealing plate, and the oil return filter element connecting pipes are correspondingly arranged at the butt joints of the main oil return cavity pipes and the oil outlet pipes, one end is communicated with the main oil return cavity pipe, and the other end is communicated with the oil outlet pipe.

6. The oil return tank assembly according to claim 1 or 2, characterized in that, A first oil return pipe is arranged on a first side surface of the oil return tank, and a second oil return pipe is arranged on a second side surface adjacent to the first side surface; and the first oil return pipe and the second oil return pipe are respectively communicated with the closed inner cavity.

7. A return oil tank assembly according to claim 1 or 2, characterized in that The oil return tank is a box body with a square cross-section, and the center line of the support column coincides with the center line of the oil return tank.

8. A fuel return tank assembly according to claim 1 or 2, characterized in that An oil return flange is arranged at the end of the main oil return cavity pipe extending out of the oil return tank; an oil outlet pipe sealing plate is arranged at the end of the oil outlet pipe far from the support sealing plate.

9. A hydraulic oil tank, characterized in that, Comprising a fuel tank body and an oil return tank assembly as described in any one of claims 1-8 arranged in the fuel tank body; Waist-shaped holes corresponding to the installation of the first oil return pipe and / or the second oil return pipe are arranged on the fuel tank body; One end of the main oil return cavity pipe of the oil return tank assembly extends out of the oil return tank and is connected to the top of the fuel tank body.

10. An engineering device, characterized in that, Comprising a hydraulic fuel tank as described in claim 9.

Images