Adjustable breathing device, hydraulic oil tank and engineering machinery

Abstract

The present invention discloses an adjustable breathing device, a hydraulic oil tank and engineering machinery. The adjustable breathing device comprises a breathing valve, a one-way valve fixing structure and a plurality of one-way valves. The one-way valve fixing structure is connected to the breathing valve, and the plurality of one-way valves are arranged in the circumferential direction of the one-way valve fixing structure. The breathing valve is used to be installed on the hydraulic oil tank, and the one-way valve fixing structure is used to be installed in the hydraulic oil tank. When the hydraulic oil tank is horizontal, the one-way valve is located above the hydraulic oil level. When the hydraulic oil tank is tilted, the one-way valve located above the hydraulic oil level is used to conduct the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level is used to close the oil path between the hydraulic oil tank and the breathing valve. The adjustable breathing device avoids the phenomenon that the hydraulic oil enters the breathing valve and causes the hydraulic oil to leak out when the hydraulic oil tank is tilted.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic systems, and in particular relates to an adjustable breathing device, a hydraulic oil tank and engineering machinery. Background Art

[0002] The breathing valve in the hydraulic system ensures that the hydraulic oil stored in the hydraulic oil tank is isolated from the atmosphere within a certain pressure range, and can be connected to the atmosphere when the pressure exceeds or falls below this range. Its principle is to use the weight of the positive and negative pressure reducing plates to control the exhaust and intake of the hydraulic oil tank, thereby achieving the air pressure balance inside and outside the tank to ensure the safety of the hydraulic oil tank. Its function is to prevent the hydraulic oil tank from being damaged due to overpressure or vacuum, and at the same time reduce the evaporation loss of the hydraulic oil.

[0003] Construction machinery is used in special environments for a long time, especially in rock blasting and mining environments. The road slope and inclination of the construction machinery are large, and it cannot be guaranteed that the breathing valve will always remain above the liquid level of the hydraulic oil, resulting in frequent hydraulic oil leakage from the breathing valve of the hydraulic oil tank of the construction machinery. Summary of the invention

[0004] The main purpose of the present invention is to provide an adjustable breathing device, a hydraulic oil tank and engineering machinery. The adjustable breathing device can ensure that the breathing valve is always kept above the liquid level of the hydraulic oil when in use, avoiding the phenomenon of hydraulic oil leakage at the breathing valve of the hydraulic oil tank.

[0005] The present invention is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides an adjustable breathing device, comprising a breathing valve, a one-way valve fixing structure and a plurality of one-way valves;

[0007] The one-way valve fixing structure is in communication with the breathing valve, and a plurality of the one-way valves are arranged in a circumferential direction of the one-way valve fixing structure;

[0008] The breathing valve is used to be installed on the hydraulic oil tank, and the one-way valve fixing structure is used to be installed in the hydraulic oil tank. When the hydraulic oil tank is horizontal, the one-way valve is located above the hydraulic oil level. When the hydraulic oil tank is tilted, the one-way valve located above the hydraulic oil level is used to open the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level is used to close the oil path between the hydraulic oil tank and the breathing valve.

[0009] The adjustable breathing device as described above also includes a controller and a balance detector, wherein the one-way valve and the balance detector are both electrically connected to the controller, the balance detector is used to detect whether the liquid level of the hydraulic oil in the hydraulic oil tank is in a horizontal state, and the controller is used to control the one-way valve located below the hydraulic oil level to close when the balance detector detects that the liquid level of the hydraulic oil is inclined.

[0010] As described above, in the adjustable breathing device, the one-way valve fixing structure is a hollow cylindrical structure, the first end of the one-way valve fixing structure is connected to the breathing valve, the second end of the one-way valve fixing structure is closed, and the plurality of one-way valves are evenly spaced and arranged in the circumferential direction at the same height of the one-way valve fixing structure.

[0011] In the adjustable breathing apparatus as described above, the number of the one-way valves is four.

[0012] In the adjustable breathing device as described above, the controller is used to close the one-way valve on the one-way valve fixing structure located on the side of the tilting direction when the balance detector detects that the hydraulic oil tank is tilted, so that at least one one-way valve on the one-way valve fixing structure located on the side opposite to the tilting direction is in a conducting state.

[0013] As described above in the adjustable breathing device, the second end of the one-way valve fixing structure is provided with an impurity precipitation collection structure.

[0014] In the adjustable breathing device as described above, a filtering structure is provided on the side of the one-way valve communicating with the breathing valve.

[0015] In the adjustable breathing device as described above, the filtering structure is a filter net.

[0016] A second aspect of the present invention provides a hydraulic oil tank, comprising an adjustable breathing device, wherein the adjustable breathing device is the adjustable breathing device as described above.

[0017] A third aspect of the present invention provides an engineering machine, comprising a hydraulic oil tank, wherein the hydraulic oil tank is the hydraulic oil tank as described above.

[0018] The adjustable breathing device of the present invention includes a breathing valve, multiple one-way valves and a one-way valve fixing structure. The one-way valve fixing structure is connected to the breathing valve, and the multiple one-way valves are arranged in the circumferential direction of the one-way valve fixing structure. The adjustable breathing device is applied to a hydraulic oil tank. When the hydraulic oil tank is horizontal, the one-way valve is located above the hydraulic oil level, and the one-way valve is in an open state. The breathing valve can maintain the stability of the air pressure inside and outside the hydraulic oil tank; when the hydraulic oil tank is tilted, the one-way valve located above the hydraulic oil level conducts the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level closes the oil path between the hydraulic oil tank and the breathing valve, which can not only ensure the stability of the air pressure inside and outside the hydraulic oil tank, but also avoid the phenomenon that the hydraulic oil enters the breathing valve and causes oil leakage when the hydraulic oil tank is tilted.

[0019] The hydraulic oil tank of the present invention includes the above-mentioned adjustable breathing device, and the breathing valve is installed on the hydraulic oil tank. When the hydraulic oil tank is horizontal, the one-way valve is located above the hydraulic oil level, and the one-way valve is in an open state. The breathing valve can maintain the stability of the air pressure inside and outside the hydraulic oil tank; when the adjustable breathing device is tilted, the one-way valve located above the hydraulic oil level conducts the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level closes the oil path between the hydraulic oil tank and the breathing valve, which can not only ensure the stability of the air pressure inside and outside the hydraulic oil tank, but also avoid the phenomenon that the hydraulic oil enters the breathing valve and causes oil leakage when the hydraulic oil tank is tilted.

[0020] The engineering machinery of the present invention includes the above-mentioned hydraulic oil tank and has the above-mentioned beneficial effects of the above-mentioned hydraulic oil tank, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a partial cross-sectional structure of a hydraulic oil tank provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a partial structure of a hydraulic oil tank provided in an embodiment of the present invention;

[0024] Figure 3 A schematic cross-sectional view of an adjustable breathing device provided by an embodiment of the present invention;

[0025] Figure 4 A top view of a one-way valve fixing structure and a one-way valve provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1-Hydraulic oil tank;

[0028] 2-Adjustable breathing device;

[0029] 21- breathing valve;

[0030] 22- one-way valve;

[0031] 23- one-way valve fixing structure;

[0032] 24-impurity precipitation collection structure;

[0033] 25- Filter structure. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] The adjustable breathing device, hydraulic oil tank and engineering machinery provided by the present invention are described in detail below in conjunction with specific embodiments.

[0038] Embodiment 1:

[0039] Figure 1A schematic diagram of a partial cross-sectional structure of a hydraulic oil tank provided in an embodiment of the present invention, Figure 2 For a partial structural diagram of a hydraulic oil tank provided in an embodiment of the present invention, please refer to Figure 1 , Figure 2 As shown, this embodiment provides a hydraulic oil tank 1, including an adjustable breathing device 2, the adjustable breathing device includes a breathing valve 21, a plurality of one-way valves 22 and a one-way valve fixing structure 23, the one-way valve fixing structure 23 is connected to the breathing valve 21, and the plurality of one-way valves 22 are arranged in the circumferential direction of the one-way valve fixing structure 23;

[0040] The breathing valve 21 is used to be installed on the hydraulic oil tank 1, and the one-way valve fixing structure 23 is used to be installed in the hydraulic oil tank 1. When the hydraulic oil tank 1 is horizontal, the one-way valve 22 is located above the hydraulic oil level. When the hydraulic oil tank 1 is tilted, the one-way valve 22 located above the hydraulic oil level is used to open the air path between the hydraulic oil tank and the breathing valve, and the one-way valve 22 located below the hydraulic oil level is used to close the oil path between the hydraulic oil tank and the breathing valve.

[0041] A one-way valve means that the fluid can only flow along the inlet, but the outlet fluid cannot flow back. It is used to prevent reverse flow in the hydraulic system. The one-way valve 22 of this embodiment can prevent the liquid from flowing back into the hydraulic oil tank. This embodiment does not impose any special restrictions on the specific structure of the one-way valve 22. The one-way valve fixing structure 23 of this embodiment is used to install the one-way valve. This embodiment does not impose any special restrictions on the shape and material of the one-way valve fixing structure 23. The breathing valve not only ensures that the hydraulic oil stored in the hydraulic oil tank is isolated from the atmosphere within a certain pressure range, but also can communicate with the atmosphere when the pressure exceeds or falls below this pressure range. This embodiment does not impose any special restrictions on the specific structure of the breathing valve 21.

[0042] When the hydraulic oil tank 1 is horizontal, the one-way valve 22 of the adjustable breathing device 2 is located above the hydraulic oil level and is in an open state. The breathing valve 21 ensures that the hydraulic oil stored in the hydraulic oil tank is isolated from the atmosphere within a certain pressure range and can be connected to the atmosphere when the pressure exceeds or falls below this pressure range. There are multiple one-way valves, and the present embodiment does not impose any special restrictions on the specific number of the one-way valves. When the hydraulic oil tank 1 is tilted, the one-way valve 22 located above the hydraulic oil level of the adjustable breathing device 2 opens the air path between the hydraulic oil tank and the breathing valve, and the one-way valve 22 located below the hydraulic oil level closes the oil path between the hydraulic oil tank and the breathing valve. The cooperation between the one-way valve 22 and the breathing valve 21 can ensure the stability of the air pressure inside and outside the hydraulic oil tank and avoid leakage of hydraulic oil.

[0043] The adjustable breathing device of the present embodiment includes a breathing valve, a one-way valve and a one-way valve fixing structure. The adjustable breathing device is applied to a hydraulic oil tank. When the hydraulic oil tank is horizontal, the one-way valve is located above the hydraulic oil level and is in an open state. The breathing valve can maintain the stability of the air pressure inside and outside the hydraulic oil tank. When the adjustable breathing device is tilted, the one-way valve located above the hydraulic oil level opens the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level closes the oil path between the hydraulic oil tank and the breathing valve, which can not only ensure the stability of the air pressure inside and outside the hydraulic oil tank, but also avoid the phenomenon that the hydraulic oil enters the breathing valve and causes oil leakage when the hydraulic oil tank is tilted.

[0044] Preferably, the adjustable breathing device 2 of this embodiment further comprises a controller and a balance detector, the one-way valve 22 and the balance detector are both electrically connected to the controller, the balance detector is used to detect whether the hydraulic oil tank 1 is in a horizontal state, and the controller controls the one-way valve below the hydraulic oil level to close when the balance detector detects that the hydraulic oil tank 1 is tilted. The adjustable breathing device of this embodiment is realized by the cooperation of the balance detector and the controller, and the control method is simple.

[0045] Figure 3 A schematic cross-sectional view of an adjustable breathing device provided in an embodiment of the present invention. Figure 4 A top view of a one-way valve fixing structure and a one-way valve provided in an embodiment of the present invention. Figure 3 and Figure 4 As shown, preferably, the one-way valve fixing structure 23 is a hollow cylindrical structure, the first end of the one-way valve fixing structure 23 is connected to the breathing valve 21, the other end of the one-way valve fixing structure 23 is closed, and the multiple one-way valves 22 are evenly spaced and arranged in the circumferential direction of the same height of the one-way valve fixing structure 23. The one-way valve fixing structure 23 of this embodiment is a cylindrical structure, the manufacturing method is simple, the one-way valves 22 are evenly spaced and arranged in the circumferential direction of the same height of the one-way valve fixing structure 23, and the appearance is beautiful.

[0046] In this embodiment, the number of the one-way valves 22 is four. In this embodiment, the number of the one-way valves 22 is set to four, and the four one-way valves 22 are evenly distributed in the circumferential direction at the same height of the one-way valve fixing structure 23. When the hydraulic oil tank is in a horizontal state, the four one-way valves 22 are all located above the liquid level of the hydraulic oil. When the balance detector detects that the liquid level of the oil is tilted, the controller closes the one-way valve 22 located on the tilting direction side, so that at least one one-way valve in the opposite direction of the tilting direction is in a conducting state. In this embodiment, by setting four one-way valves 22, when the hydraulic oil tank is tilted, the controller controls the one-way valve in the tilting direction and the two one-way valves adjacent to the tilting direction to be closed, so as to prevent the hydraulic oil from leaking out of the hydraulic oil tank, thereby ensuring that the breathing valve 21 is above the oil liquid level and preventing the oil from leaking out of the breathing valve. In this embodiment, four one-way valves are set, the structure is easy to implement, and the control method is simple.

[0047] Preferably, an impurity sedimentation collection structure 24 is provided at the bottom of the one-way valve fixing structure 23 for collecting impurities entering through the breathing valve 21 to prevent impurities entering the one-way valve fixing structure from entering the oil tank.

[0048] Preferably, a filter structure 25 is provided on the side where the one-way valve 22 is connected to the breathing valve 21. By providing the filter structure 25, pollutants entering the one-way valve fixing structure 23 through the breathing valve 21 can be filtered to prevent pollutants from entering the hydraulic oil tank through the one-way valve 22, thereby improving the cleanliness of the hydraulic oil in the tank. In this embodiment, the filter structure is a filter net.

[0049] Embodiment 2:

[0050] This embodiment provides an engineering machine, including the hydraulic oil tank described in the first embodiment.

[0051] For example: the hydraulic oil tank includes an adjustable breathing device, and the adjustable breathing device includes a breathing valve, a one-way valve and a one-way valve fixing structure;

[0052] The one-way valve fixing structure is in communication with the breathing valve, the number of the one-way valves is multiple, and the one-way valves are arranged in the circumferential direction of the one-way valve fixing structure;

[0053] The breathing valve is used to be installed on the hydraulic oil tank, and the one-way valve fixing structure is used to be installed in the hydraulic oil tank. When the hydraulic oil tank is horizontal, the one-way valve is located above the hydraulic oil level. When the hydraulic oil tank is tilted, the one-way valve located above the hydraulic oil level is used to open the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level is used to close the oil path between the hydraulic oil tank and the breathing valve.

[0054] When the construction machinery is working normally, the hydraulic oil tank is in a horizontal state, the one-way valve is above the hydraulic oil level, and the one-way valve is in an open state. The breathing valve ensures that the hydraulic oil stored in the hydraulic oil tank is isolated from the atmosphere within a certain pressure range, and can be connected to the atmosphere when the pressure exceeds or falls below this pressure range, thereby ensuring the stability of the air pressure inside and outside the hydraulic oil tank. When the construction machinery is tilted, the hydraulic oil tank is in a tilted state, and when the adjustable breathing device is tilted, the one-way valve located above the hydraulic oil level opens the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level closes the oil path between the hydraulic oil tank and the breathing valve. The cooperation of the one-way valve and the breathing valve can ensure the stability of the air pressure inside and outside the hydraulic oil tank, and also avoid leakage of hydraulic oil when the hydraulic oil tank is tilted.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable breathing device, characterized in that: It includes a breathing valve, a one-way valve fixing structure and a plurality of one-way valves; The one-way valve fixing structure is in communication with the breathing valve, and a plurality of the one-way valves are arranged in a circumferential direction of the one-way valve fixing structure; The breathing valve is used to be installed on the hydraulic oil tank, and the one-way valve fixing structure is used to be installed in the hydraulic oil tank. When the hydraulic oil tank is horizontal, the one-way valve is located above the hydraulic oil level. When the hydraulic oil tank is tilted, the one-way valve located above the hydraulic oil level is used to conduct the air path between the hydraulic oil tank and the breathing valve, and the one-way valve located below the hydraulic oil level is used to close the oil path between the hydraulic oil tank and the breathing valve. The one-way valve fixing structure is a hollow cylindrical structure, the first end of the one-way valve fixing structure is connected to the breathing valve, the second end of the one-way valve fixing structure is closed, and the plurality of one-way valves are evenly spaced and arranged in the circumferential direction at the same height of the one-way valve fixing structure; It also includes a controller and a balance detector, the one-way valve and the balance detector are both electrically connected to the controller, the balance detector is used to detect whether the liquid level of the hydraulic oil in the hydraulic oil tank is in a horizontal state, and the controller is used to control the one-way valve located below the hydraulic oil level to close when the balance detector detects that the liquid level of the hydraulic oil is inclined.

2. The adjustable breathing device according to claim 1, characterized in that: The number of the one-way valves is four.

3. The adjustable breathing device according to claim 1, characterized in that: The controller is used to close the one-way valve on the one-way valve fixing structure on the side of the tilting direction when the balance detector detects that the hydraulic oil tank is tilted, so that at least one one-way valve on the one-way valve fixing structure on the side opposite to the tilting direction is in a conducting state.

4. The adjustable breathing device according to any one of claims 1 to 3, characterized in that: The second end of the one-way valve fixing structure is provided with an impurity precipitation collection structure.

5. The adjustable breathing device according to claim 4, characterized in that: A filtering structure is arranged on the side of the one-way valve communicating with the breathing valve.

6. The adjustable breathing device according to claim 5, characterized in that: The filtering structure is a filter net.

7. A hydraulic oil tank, characterized in that: It comprises an adjustable breathing device, which is installed on the top plate of the hydraulic oil tank. The adjustable breathing device is the adjustable breathing device according to any one of claims 1 to 6.

8. An engineering machine, characterized in that: It comprises a hydraulic oil tank, and the hydraulic oil tank is the hydraulic oil tank according to claim 7.

Images