Novel hydraulic oil tank

Abstract

According to the novel hydraulic oil tank, the special oil blocking box is arranged at the top end of the interior of the tank body and located at the lower end of the breather valve, oil flowing to the breather valve can be discharged back to the hydraulic oil tank again through the oil blocking box, and hydraulic oil is greatly prevented from overflowing out of the oil tank from the breather valve; the oil return mechanism is arranged on the outer side of the box body, the special oil discharge mechanism is arranged on the outer side of the box body, 95% of return oil of the whole excavator passes through the oil return mechanism, the other 5% of return oil returns into the oil box through the special oil discharge mechanism, hydraulic oil impurities are filtered through the oil discharge filter cylinder and the oil return filter cylinder, and the situation that an oil return system is blocked on site is effectively restrained.

Description

Technical Field

[0001] The utility model belongs to the field of hydraulic oil tanks for mining excavators, and specifically relates to a hydraulic oil tank capable of reasonably returning oil (unloading oil) and reducing oil overflow. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The inventors have found that as mining excavators become larger and larger, the amount of hydraulic oil required during mining is also increasing.

[0004] On the one hand, the working environment in the mining area will become relatively harsh as the crushing conditions proceed. When the excavator is used in a mining environment for a long time, due to the large amount of mine crushing and the large road slope and high inclination, the excavator itself will tilt to a certain extent when working in this environment. The hydraulic oil tank and the hydraulic oil inside it will also shake slightly. At this time, it cannot be guaranteed that the breathing valve will always remain above the liquid level of the hydraulic oil. The oil in the tank will flow around the breathing valve during the shaking of the tank, resulting in frequent leakage of hydraulic oil from the breathing valve of the hydraulic oil tank of the construction machinery.

[0005] On the other hand, due to the increasing demand for hydraulic oil, the amount of hydraulic oil returned is also increasing. During the oil return process, the number and types of impurities carried by the hydraulic oil will also increase. If the impurities cannot be effectively filtered out, once the debris enters the hydraulic system, it may cause oil return blockage. Utility Model Content

[0006] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a new hydraulic oil tank. The utility model arranges a breathing valve at one end of the top of the box body, and an oil baffle box is arranged at the top of the box body and below the breathing valve. The oil baffle box can discharge the oil flowing to the breathing valve back into the hydraulic oil tank in time, thereby reducing the oil overflow caused by the vibration of the oil tank. In addition, the box body of the utility model is also provided with a double return oil filter cartridge structure and a special oil unloading channel, which can more efficiently process impurities in the return oil and avoid blockage of the return oil.

[0007] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0008] A novel hydraulic oil tank comprises a tank body, an oil return mechanism, an oil unloading mechanism, a breathing valve and an oil baffle box, wherein the oil return mechanism is arranged on the inner side of the tank body, and the oil unloading mechanism is arranged on the outer side of the tank body;

[0009] The oil return mechanism includes two oil return filter cartridges, which are arranged front and back in a line and are connected by an oil return filter element interconnecting pipe. The oil unloading mechanism includes an oil unloading filter cartridge, which is fixed to the outside of the box. The breathing valve is installed on the top of the box and away from the side of the oil return filter cartridge. An oil baffle box is provided at the top of the box and below the breathing valve.

[0010] Furthermore, the upper end surface of the oil retaining box is horizontally distributed and the bottom surface is inclined, and the side surface is an isosceles trapezoid with upper and lower side buckles, and an oil leakage hole is arranged at each corner of the isosceles trapezoid.

[0011] Furthermore, the return oil filter cartridge comprises a first return oil filter cartridge and a second return oil filter cartridge. The first return oil filter cartridge has two upper and lower parallel return oil ports on one side close to the oil tank body, and the lower ends of the first and second return oil filter cartridges are both provided with oil outlets.

[0012] Furthermore, the oil return mechanism also includes an oil return pipe, which includes a positioning pipe and an oil return pipe. The positioning pipe extends into the box along the left side wall of the box and is connected to the oil return port of the first return oil filter cartridge. The oil return pipe is vertically connected to the oil outlets at the lower ends of the first and second return oil filter cartridges.

[0013] Furthermore, the oil unloading filter cartridge is fixed to a side of the oil tank body close to the second oil return filter cartridge by bolts, and a plurality of oil unloading ports are arranged on an opposite side of the oil unloading filter cartridge.

[0014] Furthermore, the oil unloading mechanism also includes a mounting seat and an oil unloading pipe. The mounting seat is welded to the outer wall of the hydraulic oil tank. The mounting seat is provided with a channel through which the oil unloading pipe can pass. The oil unloading pipe is distributed in an S shape. One side of the oil unloading pipe is connected to the lower oil outlet of the oil unloading filter cartridge, and the other side extends into the interior of the box through the channel of the mounting seat.

[0015] Furthermore, a cleaning cover is provided at the bottom of the box body, and the cleaning cover corresponds to the upper and lower positions of the oil return filter cartridge interconnecting pipe.

[0016] Furthermore, the interior of the box body also includes a baffle plate, which includes a first baffle plate and a second baffle plate. The first baffle plate is arranged on one side of the return oil filter cartridge and away from the oil unloading filter cartridge, and the second baffle plate is arranged on the right side of the first baffle plate and away from the side of the return oil filter cartridge. The height of the second baffle plate is smaller than that of the first baffle plate. The baffle plate includes the first baffle plate and the second baffle plate.

[0017] Furthermore, the hydraulic oil tank also includes an oil suction filter cover and two oil return filter covers, both of which are arranged on the left side of the breathing valve, and the oil suction filter cover and two parallel oil return filter covers are sequentially arranged on the left side of the breathing valve.

[0018] With one or more of the above technical solutions, the utility model has the following beneficial effects:

[0019] 1. An oil retaining box is provided at the top of the box body and below the breathing valve of the utility model. The oil retaining box can discharge the oil flowing to the breathing valve back to the inside of the box body, greatly reducing the amount of hydraulic oil overflowing from the breathing valve to the outside of the box body.

[0020] 2. The utility model not only sets two sets of interconnected oil return mechanisms in the hydraulic oil return system, but also sets a special oil unloading mechanism on this basis. The oil unloading mechanism and the oil return mechanism occupy different proportions in the total amount of oil return. 95% of the return oil of the entire excavator passes through the oil return mechanism, and the other 5% of the return oil passes through the special oil unloading mechanism. When the hydraulic return oil passes through the return oil filter cartridge and the oil unloading filter element respectively, the impurities in the oil can be cleaned up in time, which effectively alleviates the blockage of the hydraulic oil tank return system.

[0021] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 This is a top view of the hydraulic oil tank of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the oil baffle box of the utility model;

[0025] Figure 3 This is a side view of the oil baffle box of the utility model;

[0026] Figure 4 This is the front view of the hydraulic oil tank of the utility model;

[0027] Figure 5 It is a side view of the hydraulic oil tank of the utility model;

[0028] In the figure: 1. box body, 2. breathing valve, 3. oil suction filter cover, 4. oil return filter cover, 5. oil baffle box, 6. oil leakage hole, 7. first return oil filter cartridge, 8. second return oil filter cartridge, 9. return oil filter element interconnecting pipe, 10. return oil port, 11. oil outlet, 12. positioning pipe, 13. return oil pipe, 14. oil unloading filter cartridge, 15. mounting seat, 16. oil unloading pipe, 17. oil unloading port, 18. fixing bolts, 19. right-angle pipe, 20. first baffle plate, 21. second baffle plate, 22. groove structure, 23. cleaning cover. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are for describing specific embodiments only and are not intended to be limiting of exemplary embodiments according to the present invention.

[0031] In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0032] Embodiment 1

[0033] Relative to the entire structure of the excavator, the novel hydraulic oil tank of the utility model is located at a position slightly in the middle of the right side of the platform of the entire machine.

[0034] like Figure 1 As shown, the utility model includes a box body 1, which is a rectangular shell body formed by multiple baffles and closed on all sides. A breathing valve 2 is installed on the top right upper part of the shell body, and an oil suction filter cover 3 and an oil return filter cover 4 are both arranged on the left side of the breathing valve. An oil suction filter cover 3 and two parallel oil return filter covers 4 are arranged in sequence on the left side of the breathing valve 2. An oil baffle box 5 is arranged at the top of the box body 1 and at the lower end of the breathing valve. The breathing valve of the utility model can ensure that the hydraulic oil stored in the hydraulic oil tank is isolated from the atmosphere within a certain pressure range, and can communicate with the atmosphere when the pressure exceeds or falls below this pressure range.

[0035] The number of the breathing valves 2 in this embodiment is two, and the two breathing valves can control the pressure of the oil in the box in time.

[0036] The breathing valve uses the weight of the positive and negative pressure valve disc to control the exhaust positive pressure and intake negative pressure of the box; when the pressure of the oil in the box is within the control operating pressure range of the breathing valve, the breathing valve does not work, and the airtightness of the oil tank is maintained at this time; when the hydraulic oil is pumped out of the box, the pressure in the upper gas space in the box drops. When the pressure reaches the operating negative pressure of the breathing valve, the atmosphere outside the box will push open the negative pressure valve disc that opens the breathing valve, and the outside gas enters the box, so that the pressure of the box no longer continues to drop, allowing the air pressure inside and outside the box to reach a balance, thereby protecting the box.

[0037] like Figure 2 and Figure 3 As shown, the oil baffle box 5 is a rectangular body with a hollow upper end formed by multiple baffles. The upper end surface of the oil baffle box is horizontal and the bottom surface is inclined. The side surface is an isosceles trapezoid with upper and lower sides buckled, and an oil leakage hole 6 is provided at each corner of the isosceles trapezoid.

[0038] As mining projects continue to proceed, the working environment in the mining area will become relatively harsh. When the excavator is operating at the mine site, once the amount of crushed stone is too much and the road slope and inclination are large, the hydraulic oil in the hydraulic oil tank will continue to oscillate around as the excavator tilts during work and travel, and the left and right oscillating hydraulic oil will flow to the breathing valve position.

[0039] Since an oil baffle box is provided at the lower end of the breathing valve and is located close to the inner wall of the oil tank body, the hydraulic oil near the breathing valve will flow into the oil baffle box during the oscillation. Since the bottom end of the oil baffle box adopts an inclined structure with the left side low and the right side high, the hydraulic oil in the oil baffle box will flow along the slope to the bottom of the oil baffle box and flow back into the hydraulic oil tank from the oil leakage holes on both sides of the bottom, thereby greatly reducing the amount of hydraulic oil overflowing from the breathing valve.

[0040] like Figure 4 and Figure 5 As shown, an oil return mechanism is arranged inside the box body 1, and an oil unloading mechanism is arranged outside the box body, the oil return mechanism includes an oil return filter cartridge arranged in the box body 1 and an oil return pipe installed on the oil return filter cartridge, wherein the oil return filter cartridge includes a first oil return filter cartridge 7 and a second oil return filter cartridge 8, the two oil return filter cartridges are arranged in parallel front and back, and the two oil return filter cartridges are connected by an oil return filter element interconnecting pipe 9, and two oil return ports 10 are arranged in parallel on the side of the first oil return filter cartridge 7 close to the box body 1, and the lower ends of the first and second oil return filter cartridges are provided with oil outlets 11.

[0041] The return oil pipeline includes a positioning pipe 12 and an oil return pipe 13. The positioning pipe 12 extends into the box along the left side wall of the box and is connected to the return oil port 10 of the first return oil filter cartridge 7. The return oil pipe 13 is vertically connected to the oil outlet 11 at the lower end of the first and second return oil filter cartridges. The positioning pipe will be connected to the main valve and radiator of the mining excavator. The bottom ends of the first return oil filter cartridge 7 and the second return oil filter cartridge 8 are both provided with return oil pipes 13.

[0042] The hydraulic oil of the main valve and radiator of the excavator can flow into the first oil filter cartridge 7 from the return oil port through the positioning pipe 12. The first and second return oil filter cartridges are both provided with the same return oil filter element, and the return oil filter element comes from existing products on the market. A part of the return hydraulic oil in the first oil filter cartridge 7 will directly flow to the return oil filter element of the first return oil filter cartridge 7 for filtering treatment, and the other part will flow to the second return oil filter cartridge 8 through the return oil filter element interconnecting pipe 9 for impurity filtering treatment. The return oil in the return oil filter element will be filtered from the external large cavity to the internal small cavity of the filter element. The return oil filter element is fixed in the return oil filter cartridge. The return oil filtering method is to filter from the external large cavity to the internal small cavity. While reducing the impact force generated by the return oil structure, impurities can be filtered out through the oil suction filter cartridge of the oil suction mechanism, and finally flow back to the hydraulic oil tank through the return oil port and the positioning pipe at the bottom of the first and second return oil filter cartridges.

[0043] The oil unloading mechanism comprises an oil unloading filter cartridge 14 , a mounting seat 15 , an oil unloading pipe 16 and an oil unloading port 17 .

[0044] The oil unloading filter cartridge 14 is arranged on the outside of the box body, and the oil unloading filter cartridge is fixed to one side of the box body close to the second return oil filter cartridge 8 by fixing bolts 18 and right-angle tubes 19. A plurality of oil unloading ports 17 are arranged on the opposite side of the oil unloading filter cartridge 14. The mounting seat 15 is welded to the outer wall of the hydraulic oil tank. The mounting seat 15 is provided with a channel through which the oil unloading pipe 16 can pass. The oil unloading pipe 16 is distributed in an inverted S shape. One side of the oil unloading pipe 16 is connected to the lower end oil outlet of the oil unloading filter cartridge 14, and the other side passes through the channel of the mounting seat and extends into the interior of the box body.

[0045] The shape of the oil unloading pipe 16 on the mounting seat 15 is circular, and the stress of the circular hole is relatively small, which can ensure the structural strength of the mounting seat 15. One end of the inverted S-shaped oil unloading pipe is linearly connected to the lower oil outlet of the oil unloading filter cartridge 14, and the middle horizontal section of the inverted S-shaped pipe will pass through the circular channel on the mounting seat 15 into the box body, and the right-angle pipe part of the inverted S-shaped pipe vertically points to the bottom of the box body.

[0046] Of course, the structures of the above-mentioned oil unloading filter cartridge and oil return filter cartridge are well-known structures, both of which belong to the prior art and will not be described in detail here.

[0047] The hydraulic oil in the motor and pump housing of the mining excavator will be returned specifically through the oil unloading channel. The hydraulic oil in the motor and pump housing will flow to the oil unloading filter cartridge through the oil unloading port of the oil unloading pipeline. The oil unloading filter element in the oil unloading filter cartridge has the same structure as the return oil filter element. The hydraulic oil in the oil unloading filter cartridge will filter out the impurities therein under the action of the oil unloading filter cartridge and flow back to the hydraulic oil tank through the S-shaped oil unloading pipe.

[0048] The hydraulic return oil from the motor and pump housing accounts for 5% of the total hydraulic oil of the excavator, and the hydraulic oil of the excavator's main valve and radiator accounts for 95% of the total hydraulic oil of the entire excavator. Most of the hydraulic oil of the excavator is returned through the oil return mechanism, and a small part is returned through a special oil unloading mechanism.

[0049] The baffle plate includes a first baffle plate 20 and a second baffle plate 21. The first and second baffle plates are both arranged inside the box body 1 and have gaps with the bottom of the box body. The first baffle plate 20 is arranged between the projection positions of the oil suction filter cover 3 and the return oil filter cover 4 relative to the bottom of the box body. The first baffle plate 20 is arranged on the right side of the return oil filter cartridge. The second baffle plate 21 is arranged on the side of the first baffle plate 20 away from the return oil filter cartridge. The height of the first baffle plate 20 is half of the second baffle plate 21, and both ends of the first baffle plate 21 are connected to the second baffle plate 20.

[0050] The first and second baffle plates are both rectangular structures. The upper end of the second baffle plate 21 is horizontal, while the upper end of the rectangle of the first baffle plate 20 is arc-shaped, and the bottom of the arc is exactly level with the upper end of the second baffle plate 21 .

[0051] The oil in the box 1 will be mixed with impact force during the oscillation process. Due to the different heights of the first and second baffles, a certain distance is left between them and the upper end surface of the box. In addition, the first and second baffles have gaps with the bottom of the box and are not directly connected. This allows the hydraulic oil to flow continuously on both sides of the box during the oscillation process, reducing the buffering force during the continuous flow. This is close to the partition principle of a tank truck. The baffle structure in the utility model can effectively protect the internal structure of the box.

[0052] A groove structure 22 is provided on the inner side of the plate of the hydraulic oil tank away from the oil unloading filter cartridge, and the groove structure can effectively release the pressure inside the hydraulic oil tank.

[0053] A cleaning cover 23 is provided at the bottom of the box body 1, and the cleaning cover 23 corresponds to the oil return filter cartridge interconnecting pipe 9 in upper and lower positions. When the inside of the box body needs to be cleaned, the hydraulic oil in the oil tank is first drained, and then the cleaning cover 23 is opened after the oil is drained, and then the inside of the oil tank can be cleaned.

[0054] Embodiment 2

[0055] In a typical embodiment of the utility model, this embodiment discloses a method of a new type of oil return system of a hydraulic oil tank, using the hydraulic oil tank as described in Example 1, to achieve the oil return effect from the oil return and oil unloading mechanism, including the following steps:

[0056] Step 1: The hydraulic oil of the excavator's main valve and radiator will flow to the 12 positioning pipe through the 10 return port, and then flow to the 7 first return oil filter cartridge from the 12 positioning pipe. The hydraulic return oil of the motor and pump housing will flow to the 14 oil unloading filter cartridge through the 17 oil unloading port.

[0057] Step 2: The hydraulic return oil in the first return oil filter cartridge will be divided into two parts, one part will continue to remain in the first return oil filter cartridge 7, and the other part will flow to the second connecting filter cartridge 8 through the return oil filter cartridge interconnecting pipe 9. The hydraulic oil in the first and second return oil filter cartridges will flow to the return oil filter elements of their respective filter cartridges, and impurity filtration will be carried out in the return oil filter elements. After the treatment is completed, the hydraulic oil in the oil unloading filter cartridge 14 will be filtered for impurities in the oil unloading filter element.

[0058] Step 3: The hydraulic return oil flowing through the return oil filter element and the oil unloading filter element will be filtered from the large cavity outside the filter element to the small cavity inside the filter element.

[0059] Step 4: The hydraulic oil filtered by the return oil filter will flow from the oil outlet 11 at the bottom of the return oil filter cartridge to the return oil pipe 13, and finally flow vertically back to the box body 1 through the return oil pipe 13. The hydraulic oil filtered by the self-unloading filter will flow from the oil unloading port 17 at the bottom of the 14 oil unloading filter cartridge through the S-shaped 16 oil unloading pipe, and flow back to the box body 1 through the 16 oil unloading pipe.

[0060] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A new type of hydraulic oil tank, characterized by: It includes a box body, an oil return mechanism, an oil unloading mechanism, a breathing valve and an oil baffle box, wherein the oil return mechanism is arranged on the inner side of the box body, and the oil unloading mechanism is arranged on the outer side of the box body; The oil return mechanism includes two oil return filter cartridges, which are arranged front and back in a line, and are connected by an oil return filter cartridge interconnecting pipe. The oil unloading mechanism includes an oil unloading filter cartridge, which is fixed to the outside of the box body. The breathing valve is installed on the top of the box body and away from the side of the oil return filter cartridge. The oil baffle box is arranged at the top of the inside of the box body and is located at the lower end of the breathing valve.

2. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The box body also includes an oil suction filter cover and two oil return filter covers, both of which are arranged on the left side of the breathing valve. The oil suction filter cover and two parallel oil return filter covers are sequentially arranged on the left side of the breathing valve.

3. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The oil retaining box adopts a structural distribution with a horizontal upper end surface and an inclined bottom surface, and the side surface is an isosceles trapezoid with upper and lower side buckles, and an oil leakage hole is arranged at each corner of the isosceles trapezoid.

4. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The return oil filter cartridge comprises a first return oil filter cartridge and a second return oil filter cartridge. The first return oil filter cartridge has two upper and lower parallel return oil ports on one side close to the housing. The lower ends of the first and second return oil filter cartridges are both provided with oil outlets.

5. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The oil return mechanism also includes an oil return pipeline, which includes a positioning pipe and an oil return pipe. The positioning pipe extends into the box along the left side wall of the box and is connected to the oil return port of the first oil return filter cartridge. The oil return pipe is vertically connected to the oil outlets at the lower ends of the first and second oil return filter cartridges.

6. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The oil unloading filter cartridge is fixed to one side of the box body close to the second oil return filter cartridge by bolts, and a plurality of oil unloading ports are arranged on the opposite side of the oil unloading filter cartridge.

7. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The oil unloading mechanism also includes a mounting seat and an oil unloading pipe. The mounting seat is welded to the outer wall of the hydraulic oil tank, and a channel through which the oil unloading pipe can pass is provided on the mounting seat.

8. A novel hydraulic oil tank as claimed in claim 7, characterized in that: The oil unloading pipe is distributed in an S shape, one side of the oil unloading pipe is connected to the lower oil outlet of the oil unloading filter cartridge, and the other side passes through the channel of the mounting seat and extends into the interior of the box.

9. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The bottom of the box body is also provided with a cleaning cover, and the cleaning cover corresponds to the upper and lower positions of the oil return filter cartridge intercommunication pipe.

10. A novel hydraulic oil tank as claimed in claim 1, characterized in that: The box body also includes a baffle plate, which includes a first baffle plate and a second baffle plate. The first baffle plate is arranged on one side of the return oil filter cartridge and away from the oil unloading filter cartridge, and the second baffle plate is arranged on the right side of the first baffle plate and away from the side of the return oil filter cartridge. The height of the second baffle plate is smaller than that of the first baffle plate.

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