An excavator hydraulic oil tank oil suction device

Abstract

This utility model provides an oil suction device for an excavator's hydraulic oil tank, belonging to the field of excavator technology. It includes a main hydraulic oil tank and an auxiliary hydraulic oil tank. The auxiliary hydraulic oil tank has an oil inlet on one end face, which is connected to the oil outlet at the bottom of the main hydraulic oil tank via a main oil pipe. Both ends of the main oil pipe are connected to the oil inlet and outlet respectively via flanges. The auxiliary hydraulic oil tank has multiple oil suction ports, which are connected to different working pumps via auxiliary oil pipes. This utility model can prevent cavitation in the pumps, ensuring their service life.

Description

Technical Field

[0001] This utility model belongs to the field of excavator technology, and in particular relates to an oil suction device for excavator hydraulic oil tank. Background Technology

[0002] Currently, excavators are equipped with multi-pump systems, consisting of multiple main pumps, cooling pumps, and pilot pumps. Each pump requires a separate suction line. However, due to the limited internal space of excavators, the hydraulic oil tank cannot connect to multiple suction lines. Therefore, most excavators currently have a main hydraulic line for the hydraulic oil tank, with multiple suction lines connected to the main line. The main line draws hydraulic oil from the hydraulic oil tank. However, when multiple pumps draw oil from the main line, a large suction flow will be generated. The traditional main hydraulic line has limited hydraulic oil storage capacity and cannot meet the flow demand, causing the pumps to experience cavitation and affecting their service life. Utility Model Content

[0003] In view of the defects or deficiencies in the existing technology, this utility model provides an oil suction device for excavator hydraulic oil tank, which can prevent the pump from sucking in air and ensure the service life of the pump.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An embodiment of this utility model provides an oil suction device for a hydraulic oil tank of an excavator, including a main hydraulic oil tank and an auxiliary hydraulic oil tank. An oil inlet is provided on one end face of the auxiliary hydraulic oil tank. The oil inlet is connected to the oil outlet at the bottom of the main hydraulic oil tank through a main oil pipe. The two ends of the main oil pipe are connected to the oil inlet and the oil outlet respectively through flanges.

[0006] The auxiliary hydraulic oil tank has multiple oil suction ports, which are connected to different working pumps through auxiliary oil pipes.

[0007] Furthermore, the auxiliary hydraulic oil tank has a cuboid structure and is made of steel plate by bending and welding.

[0008] Furthermore, multiple mounting seats are symmetrically arranged on both side walls of the auxiliary hydraulic oil tank, and the multiple mounting seats are located at the lower part of the side walls of the auxiliary hydraulic oil tank.

[0009] Furthermore, the mounting base is an L-shaped plate structure formed by bending a steel plate, which includes a vertical plate and a horizontal plate. The side wall of the vertical plate is welded and fixed to the side wall of the auxiliary hydraulic oil tank. The lower surface of the horizontal plate is located in the same plane as the lower surface of the auxiliary hydraulic oil tank. Bolt holes are provided on the horizontal plate.

[0010] Furthermore, an oil drain port is provided on the end face of the auxiliary hydraulic oil tank away from the oil inlet. The oil drain port is located at the bottom of the end face of the auxiliary hydraulic oil tank, and a plug is internally threaded into the oil drain port.

[0011] Furthermore, the top plate of the auxiliary hydraulic oil tank is provided with multiple main pump suction ports, all of which are located close to the oil inlet, and are arranged sequentially along the length of the top plate of the auxiliary hydraulic oil tank.

[0012] Furthermore, the top plate of the auxiliary hydraulic oil tank is also provided with multiple cooling pump suction ports, which are located at the end of the top plate of the auxiliary hydraulic oil tank away from the oil inlet, and are arranged sequentially along the length of the top plate of the auxiliary hydraulic oil tank.

[0013] Furthermore, a pilot pump suction port is provided on the side plate of the auxiliary hydraulic oil tank, and the pilot pump suction port is located at the end of the side plate of the auxiliary hydraulic oil tank near the oil inlet.

[0014] Furthermore, the diameter of the main oil pipe is larger than the diameter of any one of the auxiliary oil pipes.

[0015] Furthermore, multiple lifting screw seats are fixed on the upper surface of the top plate of the auxiliary hydraulic oil tank, and the multiple lifting screw seats are evenly distributed at both ends of the top plate of the auxiliary hydraulic oil tank.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model, by setting up an auxiliary hydraulic oil tank, connects the main hydraulic oil tank and the working pump through the auxiliary hydraulic oil tank. Compared with the traditional hydraulic oil tank main pipeline, the auxiliary hydraulic oil tank can hold more hydraulic oil and store more hydraulic oil. When multiple working pumps simultaneously draw oil at a large flow rate, the pump will not suck in cavitation, thus ensuring the service life of the pump.

[0018] 2. This utility model connects multiple oil suction pipes through an auxiliary hydraulic oil tank. Compared with the traditional hydraulic oil tank main pipeline, the auxiliary hydraulic oil tank can be equipped with more oil suction ports, which facilitates the layout of the oil suction pipes and solves the problem of difficulty in arranging multiple oil suction pipes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hydraulic oil tank suction device in an embodiment of the present invention;

[0020] The components include: 1. Auxiliary hydraulic oil tank; 2. Main oil pipe; 3. Oil inlet; 4. Mounting base; 5. Oil drain port; 6. Main pump suction port; 7. Cooling pump suction port; 8. Pilot pump suction port; and 9. Lifting screw seat. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] A typical embodiment of this utility model is as follows: Figure 1As shown, an excavator hydraulic oil tank suction device includes a main hydraulic oil tank and an auxiliary hydraulic oil tank 1. The main hydraulic oil tank is the main oil tank of the excavator and is used to store hydraulic oil. The auxiliary hydraulic oil tank 1 is connected to the main hydraulic oil tank through a main oil pipe 2. Part of the hydraulic oil in the main hydraulic oil tank enters the auxiliary hydraulic oil tank 1 through the main oil pipe 2 for storage. The auxiliary hydraulic oil tank 1 has multiple suction ports, and the multiple suction ports are connected to different working pumps through auxiliary oil pipes.

[0023] Specifically, the auxiliary hydraulic oil tank 1 has a rectangular structure and is made of steel plate by bending and welding. An oil inlet 3 is provided on one end face. The oil inlet 3 is connected to the oil outlet at the bottom of the main hydraulic oil tank through the main oil pipe 2. The two ends of the main oil pipe 2 are connected to the oil inlet 3 and the oil outlet respectively through flanges to ensure the sealing of the connection.

[0024] Multiple mounting seats 4 are symmetrically arranged on both side walls of the auxiliary hydraulic oil tank 1. The mounting seats 4 are located at the lower part of the side walls of the auxiliary hydraulic oil tank 1, and the auxiliary hydraulic oil tank 1 can be fixed to the frame using the mounting seats 4. Specifically, the mounting seat 4 is an L-shaped plate structure made of steel plate, which includes a vertical plate and a horizontal plate. The side wall of the vertical plate is welded and fixed to the side wall of the auxiliary hydraulic oil tank 1. The lower surface of the horizontal plate is in the same plane as the lower surface of the auxiliary hydraulic oil tank 1. Bolt holes are opened on the horizontal plate, so that the auxiliary hydraulic oil tank 1 can be fixed to the frame with bolts.

[0025] An oil drain port 5 is provided on the end face of the auxiliary hydraulic oil tank 1 away from the oil inlet 3. The oil drain port 5 is located at the bottom of the end face of the auxiliary hydraulic oil tank 1. By providing the oil drain port 5, the sediment and impurities in the auxiliary hydraulic oil tank 1 can be discharged from the oil drain port 5, so as to avoid the sediment and impurities from accumulating in the auxiliary hydraulic oil tank 1. A plug is threaded inside the oil drain port 5, and the plug is used to seal the oil drain port 5 to ensure the sealing of the auxiliary hydraulic oil tank 1.

[0026] Multiple main pump suction ports 6 are provided on the top plate of the auxiliary hydraulic oil tank 1. The main pump suction ports 6 are connected to the main pump through the auxiliary oil pipe, so that the main pump can draw hydraulic oil from the auxiliary hydraulic oil tank 1. Since the main pump has a large oil intake capacity, the multiple main pump suction ports 6 are set close to the oil inlet 3 to ensure the stability of oil supply.

[0027] In this embodiment, there are three main pump suction ports 6. All three main pump suction ports 6 are located close to the oil inlet 3, and the three main pump suction ports 6 are arranged sequentially along the length of the top plate of the auxiliary hydraulic oil tank 1, so that different main pumps draw oil from different positions in the auxiliary hydraulic oil tank 1, which is beneficial to the uniform distribution of flow.

[0028] The top plate of the auxiliary hydraulic oil tank 1 is also equipped with multiple cooling pump suction ports 7. The cooling pump suction ports 7 are connected to the cooling pump through the auxiliary oil pipe, so that the cooling pump can draw hydraulic oil from the auxiliary hydraulic oil tank 1. The multiple cooling pump suction ports 7 are located at the end of the top plate of the auxiliary hydraulic oil tank 1 away from the oil inlet 3, so as to be close to the cooling pump and arranged by pipeline.

[0029] In this embodiment, there are two cooling pump oil inlets 7, which are arranged sequentially along the length of the top plate of the auxiliary hydraulic oil tank 1, so that different cooling pumps draw oil from different positions in the auxiliary hydraulic oil tank 1, which is beneficial to the uniform distribution of flow rate.

[0030] A pilot pump suction port 8 is provided on the side plate of the auxiliary hydraulic oil tank 1. The pilot pump suction port 8 is connected to the pilot pump through the auxiliary oil pipe, so that the pilot pump can draw hydraulic oil from the auxiliary hydraulic oil tank 1. The pilot pump suction port 8 is located at the end of the side plate of the auxiliary hydraulic oil tank 1 near the oil inlet 3 to ensure the stability of the oil supply.

[0031] It is known that the diameter of the main oil pipe 2 is larger than that of any auxiliary oil pipe, so that hydraulic oil can be quickly replenished from the main hydraulic oil tank to the auxiliary hydraulic oil tank 1, while reducing the pressure loss during the flow of hydraulic oil.

[0032] Multiple lifting screw seats 9 are fixed on the upper surface of the top plate of the auxiliary hydraulic oil tank 1. The multiple lifting screw seats 9 are evenly distributed at both ends of the top plate of the auxiliary hydraulic oil tank 1. The lifting screw seats 9 are cylindrical and have threaded holes at their axes for connecting lifting rings, so as to facilitate the lifting and moving of the auxiliary hydraulic oil tank 1.

[0033] This invention places the auxiliary hydraulic oil tank between the main hydraulic oil tank and the working pump. Compared with the traditional main suction pipeline, the auxiliary hydraulic oil tank can be equipped with more suction ports, which facilitates the layout of the suction pipeline and solves the problem of difficult layout of multiple suction pipelines. At the same time, the auxiliary hydraulic oil tank can store more hydraulic oil, so when multiple working pumps simultaneously draw oil at a large flow rate, the pump will not experience cavitation, thus ensuring the service life of the pump.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil suction device for an excavator hydraulic oil tank, characterized in that, It includes a main hydraulic oil tank and an auxiliary hydraulic oil tank. The auxiliary hydraulic oil tank has an oil inlet on one end face. The oil inlet is connected to the oil outlet at the bottom of the main hydraulic oil tank through a main oil pipe. The two ends of the main oil pipe are connected to the oil inlet and the oil outlet respectively through flanges. The auxiliary hydraulic oil tank has multiple oil suction ports, which are connected to different working pumps through auxiliary oil pipes.

2. The hydraulic oil tank suction device for an excavator as described in claim 1, characterized in that, The auxiliary hydraulic oil tank has a rectangular structure and is made of steel plate by bending and welding.

3. The hydraulic oil tank suction device for excavators as described in claim 1, characterized in that, Multiple mounting seats are symmetrically arranged on both side walls of the auxiliary hydraulic oil tank, and the multiple mounting seats are located at the lower part of the side walls of the auxiliary hydraulic oil tank.

4. The hydraulic oil tank suction device for an excavator as described in claim 3, characterized in that, The mounting base is an L-shaped plate structure made of steel plate, which includes a vertical plate and a horizontal plate. The side wall of the vertical plate is welded and fixed to the side wall of the auxiliary hydraulic oil tank. The lower surface of the horizontal plate is in the same plane as the lower surface of the auxiliary hydraulic oil tank. Bolt holes are opened on the horizontal plate.

5. The hydraulic oil tank suction device for an excavator as described in claim 1, characterized in that, An oil drain port is provided on the end face of the auxiliary hydraulic oil tank away from the oil inlet. The oil drain port is located at the bottom of the end face of the auxiliary hydraulic oil tank, and a plug is internally threaded into the oil drain port.

6. The hydraulic oil tank suction device for an excavator as described in claim 1, characterized in that, The top plate of the auxiliary hydraulic oil tank has multiple main pump suction ports, which are all located close to the oil inlet and are arranged sequentially along the length of the top plate of the auxiliary hydraulic oil tank.

7. The hydraulic oil tank suction device for an excavator as described in claim 1, characterized in that, The top plate of the auxiliary hydraulic oil tank is also provided with multiple cooling pump suction ports. These multiple cooling pump suction ports are located at the end of the top plate of the auxiliary hydraulic oil tank away from the oil inlet, and are arranged sequentially along the length of the top plate of the auxiliary hydraulic oil tank.

8. The hydraulic oil tank suction device for an excavator as described in claim 1, characterized in that, The auxiliary hydraulic oil tank side plate is provided with a pilot pump suction port, which is located at the end of the auxiliary hydraulic oil tank side plate near the oil inlet.

9. The hydraulic oil tank suction device for an excavator as described in claim 1, characterized in that, The diameter of the main oil pipe is larger than the diameter of any of the auxiliary oil pipes.

10. The hydraulic oil tank suction device for an excavator as described in claim 1, characterized in that, Multiple lifting screw seats are fixed on the upper surface of the top plate of the auxiliary hydraulic oil tank, and the multiple lifting screw seats are evenly distributed at both ends of the top plate of the auxiliary hydraulic oil tank.

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