CN212455062U - Liquid level control device, hydraulic system and engineering machinery - Google Patents
Liquid level control device, hydraulic system and engineering machinery Download PDFInfo
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- CN212455062U CN212455062U CN202021540462.XU CN202021540462U CN212455062U CN 212455062 U CN212455062 U CN 212455062U CN 202021540462 U CN202021540462 U CN 202021540462U CN 212455062 U CN212455062 U CN 212455062U
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Abstract
A liquid level control device, a hydraulic system and engineering machinery, wherein the liquid level control device comprises a first liquid storage part, a second liquid storage part, a first input pipeline, a second input pipeline and a liquid separation part; the first input pipeline is respectively communicated with the first liquid storage part and the liquid separation part, and the second input pipeline is respectively communicated with the second liquid storage part and the liquid separation part; the liquid separating part comprises a first state, a second state and a third state: when the liquid separating part is in a first state, the liquid in the first input pipeline flows to the first liquid storage part, and the liquid in the second input pipeline flows to the second liquid storage part; when the liquid separating part is in the second state, the liquid in the first input pipeline and the liquid in the second input pipeline both flow to the first liquid storage part; when the liquid separating part is in the third state, the liquid in the first input pipeline and the liquid in the second input pipeline both flow to the second liquid storing part. The liquid level control device can adjust the liquid storage amount of the two liquid storage portions, so that the difference of the liquid storage amount of the two liquid storage portions is controllable.
Description
Technical Field
The utility model relates to a hydraulic equipment field particularly, relates to a level control device, hydraulic system and engineering machine tool.
Background
The hydraulic system is used as an important transmission mechanism and widely applied to the field of modern machinery, in particular to heavy-load machinery similar to a crane.
In the prior art, heavy-duty cranes all adopt a hydraulic system as a main power component, such as a large-tonnage crawler crane and the like.
For large-tonnage, particularly ultra-large-tonnage crawler cranes, the hoisting parts are often nuclear power domes or petrochemical ultra-large-tonnage oil tanks and the like, which are extremely important parts, and the hoisting safety can not allow any flash loss.
To ensure a perfect balance, a crane often uses two sets of engines and their hydraulic systems. Ensuring that any one set of engine or two sets of engines can drive any action of the whole vehicle. In the event of a damaged engine, the device can still function properly.
For reasons of component layout, both engine hydraulic systems are each equipped with a hydraulic oil tank. The hydraulic system is an oil path combined with an open-close type hydraulic system.
Because of the characteristics of the oil way, oil drainage of the motor of the whole vehicle and the T port of the auxiliary multi-way valve return to two oil tanks simultaneously. Due to the characteristic difference of elements and the fact that pipelines cannot be completely symmetrical, the liquid level of the oil tanks on two sides cannot be unbalanced no matter two engines work simultaneously or a single engine works, and the liquid level difference is larger and larger along with the lapse of time.
Because the difference of the liquid level of the two oil tanks is uncontrollable, the liquid level of the oil tank on one side is excessively high and even fully rises even in severe cases, and the liquid level of the oil tank on the other side is excessively low and even the oil pump is empty, so that potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a liquid level control device, its liquid storage volume that can adjust two liquid storage portions to make the difference of the liquid storage volume of two liquid storage portions controllable.
Another object of the utility model is to provide a hydraulic system, it has adopted foretell liquid level control device, can adjust the fluid of two hydraulic system's oil tanks for the liquid level difference is controllable, avoids taking place the condition that certain side oil tank liquid level was low excessively.
Another object of the utility model is to provide an engineering machine tool, it has adopted foretell hydraulic system, consequently can avoid the liquid level difference of two oil tanks too big, avoids taking place the condition that certain one side oil tank liquid level was crossed low, and guarantee safety and stability moves.
The utility model discloses a realize like this:
a liquid level control device comprises a first liquid storage part, a second liquid storage part, a first input pipeline, a second input pipeline and a liquid separation part; the first input pipeline is respectively communicated with the first liquid storage part and the liquid separation part, and the second input pipeline is respectively communicated with the second liquid storage part and the liquid separation part; the liquid separating part comprises a first state, a second state and a third state: when the liquid separating part is in a first state, the liquid in the first input pipeline flows to the first liquid storage part, and the liquid in the second input pipeline flows to the second liquid storage part; when the liquid separating part is in the second state, the liquid in the first input pipeline and the liquid in the second input pipeline both flow to the first liquid storage part; when the liquid separating part is in the third state, the liquid in the first input pipeline and the liquid in the second input pipeline both flow to the second liquid storing part.
The utility model discloses a liquid level control device adjusts the stock solution volume in first stock solution portion and the second stock solution portion through dividing liquid portion, and when dividing liquid portion to be in the second state, the liquid of second stock solution portion can flow to first stock solution portion, and when dividing liquid portion to be in the third state, the liquid of first stock solution portion can flow to second stock solution portion, divides liquid portion to control the difference of the interior liquid reserve volume of first stock solution portion and second stock solution portion promptly through the control.
Further, the liquid separation part comprises a first liquid discharge pipeline and a second liquid discharge pipeline; the first liquid drainage pipeline is communicated with the first liquid storage part, and the second liquid drainage pipeline is communicated with the second liquid storage part; when the liquid separating part is in a first state or a second state, the first input pipeline is communicated with the first liquid discharging pipeline; when the liquid separation part is in the third state, the first input pipeline is communicated with the second liquid drainage pipeline.
Further, the liquid separation part comprises a third liquid drainage pipeline and a fourth liquid drainage pipeline; the third liquid drainage pipeline is communicated with the first liquid storage part, and the fourth liquid drainage pipeline is communicated with the second liquid storage part; when the liquid separation part is in the first state or the third state, the second input pipeline is communicated with the fourth liquid discharge pipeline; when the liquid separation part is in the second state, the second input pipeline is communicated with the third liquid discharge pipeline.
Further, the liquid separation part comprises a first liquid discharge pipeline, a second liquid discharge pipeline, a third liquid discharge pipeline, a fourth liquid discharge pipeline and a reversing valve; the reversing valve comprises a first inlet, a second inlet, a first outlet, a second outlet, a third outlet and a fourth outlet; the first input pipeline is communicated with the first inlet, and the second input pipeline is communicated with the second inlet; the first liquid discharge pipeline is respectively communicated with the first outlet and the first liquid storage part, the second liquid discharge pipeline is respectively communicated with the second outlet and the second liquid storage part, the third liquid discharge pipeline is respectively communicated with the third outlet and the first liquid storage part, and the fourth liquid discharge pipeline is respectively communicated with the fourth outlet and the second liquid storage part; the change valve includes: the first gear is communicated with the first inlet and the first outlet and communicated with the second inlet and the fourth outlet; the second gear is communicated with the first inlet and the first outlet and communicated with the second inlet and the third outlet; and the third gear is communicated with the first inlet, the second outlet and the second inlet and the fourth outlet.
Further, all be provided with the check valve on first drain line, the second drain line, the third drain line and the fourth drain line.
Further, be provided with the first pump body on the first input pipeline, the entry and the first stock solution portion intercommunication of the first pump body, the export and the branch liquid portion intercommunication of the first pump body.
Further, a second pump body is arranged on the second input pipeline, an inlet of the second pump body is communicated with the second liquid storage portion, and an outlet of the second pump body is communicated with the liquid separation portion.
Further, the liquid level control device also comprises a first detection part, a second detection part and a control part; the first detection part is used for detecting the volume of the liquid in the first liquid storage part and is electrically connected with the control part; the second detection part is used for detecting the volume of the liquid in the second liquid storage part and is electrically connected with the control part; the control unit controls the liquid separator to switch among a first state, a second state, and a third state based on the detection results of the first detection unit and the second detection unit.
A hydraulic system comprises a first oil tank, a second oil tank and the liquid level control device, wherein the first oil tank is a first liquid storage part of the liquid level control device, and the second oil tank is a second liquid storage part of the liquid level control device.
The utility model discloses a hydraulic system has realized through hydraulic control device that the fluid in first oil tank and the second oil tank is adjustable controllable to the liquid level of first oil tank and second oil tank can be on average, the condition that the liquid level was low excessively appears in avoiding certain oil tank.
An engineering machine comprises a first hydraulic device, a second hydraulic device and the hydraulic system, wherein the first hydraulic device is communicated with a first oil tank of the hydraulic system, and the second hydraulic device is communicated with a second oil tank of the hydraulic system.
The utility model discloses an engineering machine tool has adopted the utility model discloses a hydraulic system consequently can realize the liquid level balance of first oil tank and second oil tank, avoids certain oil tank to appear the condition that the liquid level is low excessively, has ensured engineering machine tool safety, stable operation.
The beneficial effects of the utility model mainly lie in: and the liquid level control device can adjust the liquid storage amounts of the two liquid storage parts, so that the difference of the liquid storage amounts of the two liquid storage parts is controllable. The hydraulic system adopts the liquid level control device, and can adjust the oil liquid of two oil tanks of the hydraulic system, so that the liquid level difference is controllable, and the condition that the liquid level of the oil tank on one side is too low is avoided. The engineering machinery adopts the hydraulic system, so that the situation that the liquid level difference of two oil tanks is too large, the liquid level of one oil tank is too low is avoided, and the safe and stable operation is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of a liquid separating portion of a first embodiment of a liquid level control device according to the present invention in a first state;
fig. 2 is a schematic view of the liquid separating portion of the first embodiment of the liquid level control device of the present invention in a second state;
fig. 3 is a schematic view showing the liquid separating portion of the first embodiment of the liquid level control apparatus of the present invention in a third state;
FIG. 4 is a schematic view of a dispensing valve of a first embodiment of the fluid level control apparatus of the present invention;
fig. 5 is a schematic view of a second embodiment of the liquid level control apparatus of the present invention.
In the figure:
11-a first input conduit; 12-a second input conduit; 21-a first drainage conduit; 22-a second drain conduit; 23-a third drainage conduit; 24-a fourth drainage conduit; 30-a reversing valve; 101-a first inlet; 102-a second inlet; 201-a first outlet; 202-a second outlet; 203-a third outlet; 204-a fourth outlet; 50-a check valve; 41-a first pump body; 42-a second pump body; 100-a first tank; 200-a second tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In one aspect of the present invention, a liquid level control device is provided, which comprises a first liquid storage part, a second liquid storage part, a first input pipeline 11, a second input pipeline 12 and a liquid separation part; the first input pipeline 11 is respectively communicated with the first liquid storage part and the liquid separation part, and the second input pipeline 12 is respectively communicated with the second liquid storage part and the liquid separation part; the liquid separating part comprises a first state, a second state and a third state: when the liquid separating part is in the first state, the liquid in the first input pipeline 11 flows to the first liquid storage part, and the liquid in the second input pipeline 12 flows to the second liquid storage part; when the liquid separating part is in the second state, the liquid in the first input pipeline 11 and the second input pipeline 12 flows to the first liquid storage part; when the liquid separating part is in the third state, the liquid in the first input pipeline 11 and the liquid in the second input pipeline 12 both flow to the second liquid storing part.
Fig. 1 to 3 show a first embodiment of the liquid level control device of the present invention.
The first input pipeline 11 is provided with a first pump body 41, an inlet of the first pump body 41 is communicated with the first liquid storage part, an outlet of the first pump body 41 is communicated with the liquid separation part, the first pump body 41 provides power for the first input pipeline 11, and liquid in the first liquid storage part is pumped out and flows into the first input pipeline 11.
The second input pipeline 12 is provided with a second pump body 42, an inlet of the second pump body 42 is communicated with the second liquid storage part, an outlet of the second pump body 42 is communicated with the liquid separation part, the second pump body 42 provides power for the second input pipeline 12, and liquid in the second liquid storage part is pumped out and flows into the second input pipeline 12.
The liquid separation part comprises a first liquid discharge pipeline 21, a second liquid discharge pipeline 22, a third liquid discharge pipeline 23, a fourth liquid discharge pipeline 24 and a reversing valve 30, and the reversing valve 30 is a three-position six-way reversing valve.
In the present embodiment, the direction switching valve 30 is preferably a solenoid valve including two relays, i.e., a first relay QM1 and a second relay QM2, thereby controlling the direction switching valve 30 to have three gear positions.
As shown in fig. 4, the directional valve includes a first inlet 101, a second inlet 102, a first outlet 201, a second outlet 202, a third outlet 203, and a fourth outlet 204. Wherein the first input conduit 11 communicates with the first inlet 101 and the second input conduit 12 communicates with the second inlet 102; the first liquid drainage pipeline 21 is respectively communicated with the first outlet 201 and the first liquid storage part, the second liquid drainage pipeline 22 is respectively communicated with the second outlet 202 and the second liquid storage part, the third liquid drainage pipeline 23 is respectively communicated with the third outlet 203 and the first liquid storage part, and the fourth liquid drainage pipeline 24 is respectively communicated with the fourth outlet 204 and the second liquid storage part.
Fig. 1 shows the fluid path structure of the switching valve 30 in the first gear position, that is, the fluid separating portion is in the first state, both the first relay QM1 and the second relay QM2 are de-energized, the switching valve 30 communicates the first inlet 101 with the first outlet 201 and communicates the second inlet 102 with the fourth outlet 204, so that the first input pipe 11 communicates with the first fluid discharging pipe 21, the fluid flowing out of the first fluid storage portion returns to the first fluid storage portion, the second input pipe 12 communicates with the fourth fluid discharging pipe 24, and the fluid flowing out of the second fluid storage portion returns to the second fluid storage portion.
In this state, the first reservoir portion and the second reservoir portion do not exchange liquid, and the liquid flowing out from the first reservoir portion is returned to the first reservoir portion, and the liquid flowing out from the second reservoir portion is returned to the second reservoir portion.
Fig. 2 shows the fluid path structure in which the switching valve 30 is in the second position, that is, the fluid separating portion is in the second state, the first relay QM1 is de-energized, the second relay QM2 is energized, the switching valve 30 communicates the first inlet 101 with the first outlet 201 and communicates the second inlet 102 with the third outlet 203, so that the first input pipe 11 communicates with the first fluid discharging pipe 21, the fluid flowing from the first fluid reservoir portion returns to the first fluid reservoir portion, the second input pipe 12 communicates with the third fluid discharging pipe 23, and the fluid flowing from the second fluid reservoir portion flows to the first fluid reservoir portion.
In this state, the second reservoir portion flows into the first reservoir portion, that is, the second reservoir portion replenishes the first reservoir portion.
Fig. 3 shows the fluid path structure in which the switching valve 30 is in the third gear position, that is, the fluid separating portion is in the third state, the first relay QM1 is powered, the second relay QM2 is powered off, the switching valve 30 communicates with the first inlet 101 and the second outlet 202, and communicates with the second inlet 102 and the fourth outlet 204, so that the first input pipeline 11 communicates with the second fluid discharging pipeline 22, the fluid flowing from the first fluid storage portion flows to the second fluid storage portion, the second input pipeline 12 communicates with the fourth fluid discharging pipeline 24, and the fluid flowing from the second fluid storage portion returns to the second fluid storage portion.
In this state, the first reservoir portion flows into the second reservoir portion, that is, the first reservoir portion replenishes the second reservoir portion.
The liquid level control device also comprises a first detection part, a second detection part and a control part; the first detection part is used for detecting the volume of the liquid in the first liquid storage part and is electrically connected with the control part; the second detection part is used for detecting the volume of the liquid in the second liquid storage part and is electrically connected with the control part; the control unit controls the liquid separator to switch among a first state, a second state, and a third state based on the detection results of the first detection unit and the second detection unit.
In this embodiment, the first detection portion and the second detection portion are liquid level sensors, the first detection portion is used for detecting the liquid level of the first liquid storage portion, the second detection portion is used for detecting the liquid level of the second liquid storage portion, and the control portion controls the gear of the reversing valve 30 according to the liquid level difference between the first liquid storage portion and the second liquid storage portion.
When it is desired to balance the liquid levels in the first and second reservoirs, the following control logic may be employed:
if the liquid level difference between the first liquid storage part and the second liquid storage part is within an allowable range, for example, the liquid level difference t is greater than-a and less than a, the reversing valve 30 is controlled to be in a first gear;
if the liquid level difference between the first liquid storage part and the second liquid storage part is smaller than or equal to the threshold value, for example, the liquid level difference t is smaller than or equal to-a, the reversing valve 30 is controlled to be in the second gear position, so that the liquid in the second liquid storage part supplements the first liquid storage part;
if the liquid level difference between the first liquid storage part and the second liquid storage part is greater than or equal to the threshold value, for example, the liquid level difference t is greater than or equal to a, the reversing valve 30 is controlled to be in the third gear, so that the liquid in the first liquid storage part supplements the liquid in the second liquid storage part.
Fig. 5 shows a second embodiment of the liquid level control device of the present invention, which is compared with the first embodiment, and the check valves 50 are disposed on the first liquid discharge pipeline 21, the second liquid discharge pipeline 22, the third liquid discharge pipeline 23 and the fourth liquid discharge pipeline 24, so as to prevent the reversing valve 30 from sucking back liquid in the liquid discharge pipelines during the reversing process.
In the present embodiment, the check valve 50 is a one-way valve.
In some embodiments, which are not shown in the figures, the liquid separation section is not provided with a three-position, six-way reversing valve, but with two-position, four-way reversing valves, i.e. the first feed line and the second feed line are each controlled by two-position, four-way reversing valves.
The liquid separation part comprises a first liquid discharge pipeline, a second liquid discharge pipeline and a first reversing valve, and the first reversing valve is a two-position four-way reversing valve; the first liquid drainage pipeline is communicated with the first liquid storage part, and the second liquid drainage pipeline is communicated with the second liquid storage part; when the first reversing valve is in a first state, the first input pipeline is communicated with the first liquid discharge pipeline; when the first reversing valve is in the second state, the first input pipeline is communicated with the second liquid drainage pipeline.
The liquid separation part comprises a third liquid discharge pipeline, a fourth liquid discharge pipeline and a second reversing valve, and the second reversing valve is a two-position four-way reversing valve; the third liquid drainage pipeline is communicated with the first liquid storage part, and the fourth liquid drainage pipeline is communicated with the second liquid storage part; when the second reversing valve is in the first state, the second input pipeline is communicated with the fourth liquid drainage pipeline; when the second reversing valve is in the second state, the second input pipeline is communicated with the third liquid drainage pipeline.
When the first reversing valve is in the first state and the second reversing valve is in the first state, the first liquid storage part and the second liquid storage part are independent respectively, and the liquid supplementing is not performed in the embodiment which is equivalent to the first state of the first embodiment.
When the first reversing valve is in the first state and the second reversing valve is in the second state, the second liquid storage part replenishes the liquid to the first liquid storage part, and the embodiment is equivalent to the second state of the first embodiment.
When the first reversing valve is in the second state and the second reversing valve is in the first state, the first liquid storage part replenishes the second liquid storage part, and the embodiment is equivalent to the third state of the first embodiment.
According to the utility model discloses a second aspect still provides a hydraulic system, including first oil tank 100, second oil tank 200 and foretell liquid level control device, first oil tank 100 is liquid level control device's first stock solution portion, and second oil tank 200 is liquid level control device's second stock solution portion.
The utility model discloses a hydraulic system has adopted foretell liquid level control device for realize the liquid level balance in first oil tank 100 and the second oil tank 200, avoid the liquid level difference too big.
In one particular embodiment:
when the difference between the oil levels of the first oil tank 100 and the second oil tank 200 is less than 15%, the two relays of the reversing valve 30 are powered off, at the moment, the oil in the first oil tank 100 returns to the first oil tank 100, and the oil in the second oil tank 200 returns to the second oil tank 200;
when the liquid level of the second oil tank 200 is higher than the liquid level of the first oil tank 100 by more than 15%, the second relay QM2 of the reversing valve 30 is powered on, the first relay QM1 is powered off, at the moment, the oil liquid of the second oil tank 200 flows to the first oil tank 100, and after the oil levels of the two oil tanks are consistent, the second relay QM2 is powered off;
when the liquid level of the first oil tank 100 is higher than the liquid level of the second oil tank 200 by more than 15%, the first relay QM1 of the reversing valve 30 is electrified, the second relay QM2 is electrified, the oil liquid in the first oil tank 100 flows to the second oil tank 200 at the moment, and after the oil levels of the two oil tanks are consistent, the first relay QM1 is electrified.
According to the second aspect of the present invention, there is also provided an engineering machine, comprising a first hydraulic device, a second hydraulic device and the hydraulic system, wherein the first hydraulic device is communicated with the first oil tank 100 of the hydraulic system, and the second hydraulic device is communicated with the second oil tank 200 of the hydraulic system.
The utility model discloses an engineering machine tool is provided with two sets of hydraulic means to when one of them set of hydraulic means trouble, another set of hydraulic means can continue the operation, avoids taking place the incident.
In consideration of mechanical structure design, the two sets of hydraulic devices respectively adopt the first oil tank 100 and the second oil tank 200 for oil supply and respectively operate independently.
The utility model discloses an engineering machine tool has still adopted foretell hydraulic system, and consequently the liquid level difference that can avoid two oil tanks is too big, avoids taking place the condition that certain one side oil tank liquid level is low excessively, and guarantee safety and stability moves.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A liquid level control device, comprising a first liquid storage part, a second liquid storage part, a first input pipeline (11), a second input pipeline (12) and a liquid separation part; the first input pipeline (11) is respectively communicated with the first liquid storage part and the liquid separating part, and the second input pipeline (12) is respectively communicated with the second liquid storage part and the liquid separating part; the liquid separation part comprises a first state, a second state and a third state:
when the liquid separation part is in a first state, the liquid in the first input pipeline (11) flows to the first liquid storage part, and the liquid in the second input pipeline (12) flows to the second liquid storage part;
when the liquid separation part is in a second state, the liquid in the first input pipeline (11) and the second input pipeline (12) flows to the first liquid storage part;
when the liquid separation part is in a third state, the liquid in the first input pipeline (11) and the liquid in the second input pipeline (12) both flow to the second liquid storage part.
2. The liquid level control device according to claim 1, characterized in that the liquid dividing portion comprises a first liquid discharge conduit (21), a second liquid discharge conduit (22); the first liquid drainage pipeline (21) is communicated with the first liquid storage part, and the second liquid drainage pipeline (22) is communicated with the second liquid storage part; when the liquid separation part is in a first state or a second state, the first input pipeline (11) is communicated with the first liquid discharge pipeline (21); when the liquid separation part is in a third state, the first input pipeline (11) is communicated with the second liquid drainage pipeline (22).
3. A liquid level control device according to claim 1, characterized in that the liquid dividing portion comprises a third liquid discharge conduit (23) and a fourth liquid discharge conduit (24); the third liquid drainage pipeline (23) is communicated with the first liquid storage part, and the fourth liquid drainage pipeline (24) is communicated with the second liquid storage part; when the liquid separation part is in the first state or the third state, the second input pipeline (12) is communicated with the fourth liquid drainage pipeline (24); when the liquid separation part is in a second state, the second input pipeline (12) is communicated with the third liquid drainage pipeline (23).
4. The liquid level control device according to claim 1, characterized in that the liquid separation part comprises a first liquid discharge conduit (21), a second liquid discharge conduit (22), a third liquid discharge conduit (23), a fourth liquid discharge conduit (24) and a reversing valve (30); the reversing valve comprises a first inlet (101), a second inlet (102), a first outlet (201), a second outlet (202), a third outlet (203) and a fourth outlet (204); the first input duct (11) communicating with the first inlet (101), the second input duct (12) communicating with the second inlet (102); the first liquid drainage pipeline (21) is respectively communicated with the first outlet (201) and the first liquid storage part, the second liquid drainage pipeline (22) is respectively communicated with the second outlet (202) and the second liquid storage part, the third liquid drainage pipeline (23) is respectively communicated with the third outlet (203) and the first liquid storage part, and the fourth liquid drainage pipeline (24) is respectively communicated with the fourth outlet (204) and the second liquid storage part;
the direction valve includes:
a first gear communicating the first inlet (101) and the first outlet (201) and communicating the second inlet (102) and the fourth outlet (204);
a second gear communicating the first inlet (101) and the first outlet (201) and communicating the second inlet (102) and the third outlet (203);
a third gear communicating the first inlet (101) and the second outlet (202) and communicating the second inlet (102) and the fourth outlet (204).
5. The liquid level control device according to claim 4, characterized in that the first drain line (21), the second drain line (22), the third drain line (23) and the fourth drain line (24) are each provided with a check valve (50).
6. The fluid level control device according to any one of claims 1 to 5, characterized in that a first pump body (41) is arranged on the first input pipe (11), an inlet of the first pump body (41) is communicated with the first liquid storage part, and an outlet of the first pump body (41) is communicated with the liquid separation part.
7. The fluid level control device according to any one of claims 1 to 5, characterized in that a second pump body (42) is arranged on the second input pipe (12), an inlet of the second pump body (42) is communicated with the second liquid storage part, and an outlet of the second pump body (42) is communicated with the liquid separation part.
8. The fluid level control apparatus of claim 1, further comprising a first detection portion, a second detection portion, and a control portion; the first detection part is used for detecting the volume of the liquid in the first liquid storage part and is electrically connected with the control part; the second detection part is used for detecting the volume of the liquid in the second liquid storage part and is electrically connected with the control part; the control part controls the liquid separation part to switch among a first state, a second state and a third state according to the detection results of the first detection part and the second detection part.
9. A hydraulic system, comprising a first tank (100), a second tank (200) and a level control device according to any one of claims 1 to 8, the first tank (100) being a first reservoir of the level control device and the second tank (200) being a second reservoir of the level control device.
10. A working machine, characterized in that it comprises a first hydraulic device, which communicates with a first tank (100) of the hydraulic system, a second hydraulic device, which communicates with a second tank (200) of the hydraulic system, and the hydraulic system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021540462.XU CN212455062U (en) | 2020-07-30 | 2020-07-30 | Liquid level control device, hydraulic system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021540462.XU CN212455062U (en) | 2020-07-30 | 2020-07-30 | Liquid level control device, hydraulic system and engineering machinery |
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| CN212455062U true CN212455062U (en) | 2021-02-02 |
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| CN202021540462.XU Active CN212455062U (en) | 2020-07-30 | 2020-07-30 | Liquid level control device, hydraulic system and engineering machinery |
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| CN (1) | CN212455062U (en) |
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2020
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