CN117249126B - Oil tank structure, hydraulic control system and working machine - Google Patents

Oil tank structure, hydraulic control system and working machine Download PDF

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Publication number
CN117249126B
CN117249126B CN202311527241.7A CN202311527241A CN117249126B CN 117249126 B CN117249126 B CN 117249126B CN 202311527241 A CN202311527241 A CN 202311527241A CN 117249126 B CN117249126 B CN 117249126B
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China
Prior art keywords
oil
valve
tank
oil port
port
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CN202311527241.7A
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Chinese (zh)
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CN117249126A (en
Inventor
贺电
张斌
刘伟涛
徐周
汪锋维
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN202311527241.7A priority Critical patent/CN117249126B/en
Publication of CN117249126A publication Critical patent/CN117249126A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/20—Control systems or devices for non-electric drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/005—Filling or draining of fluid systems

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

The invention relates to the technical field of operation machinery, and provides an oil tank structure, a hydraulic control system and an operation machinery, wherein the oil tank structure comprises a tank body, an oil pushing device and a first valve, the oil pushing device is arranged in the tank body, the oil pushing device can be switched between an expansion state and a compression state, the first valve is arranged on the tank body and is suitable for being opened or closed, the oil pushing device is additionally arranged in the tank body, the first valve is simultaneously arranged, when an oil port is not arranged at the bottom of the oil tank relatively, the oil pushing device is switched from the compression state to the expansion state by utilizing the working principle of the oil pushing device, the oil in the tank body is pushed to the position of the oil port, and the first valve is used for exhausting, so that the oil in the tank body is always gathered at the oil port when the oil tank is in any position shape, and smooth oil supply of the oil tank is ensured.

Description

Oil tank structure, hydraulic control system and working machine
Technical Field
The invention relates to the technical field of working machines, in particular to an oil tank structure, a hydraulic control system and a working machine.
Background
At present, the position form of an oil tank for supplying oil to a working machine is usually fixed, the oil outlet of the oil tank is always arranged at the bottom of the oil tank relatively, and oil in the oil tank is gathered at the oil outlet at the bottom by utilizing the action of gravity, so that the oil supply of the oil tank is ensured to be smooth.
In some cases, when the position of the oil tank changes with the attached carrier, there is a change in the position of the oil outlet relative to the oil tank, for example, when the carrier attached to the oil tank is turned upside down, the oil outlet is relatively arranged at the bottom of the oil tank, and is relatively arranged at the top of the oil tank, or when the carrier attached to the oil tank is turned upside down, the oil outlet is relatively arranged at the bottom of the oil tank, and is relatively arranged at the side of the oil tank.
However, when the oil outlet is not arranged at the bottom of the oil tank, the oil in the oil tank cannot be always gathered at the oil outlet due to the action of gravity, so that the oil supply of the oil tank is not smooth, and the oil pump is damaged.
Disclosure of Invention
The invention provides an oil tank structure, a hydraulic control system and an operation machine, which are used for solving the problem that oil supply is not smooth due to the fact that the position of an oil outlet relative to an oil tank is changed in the prior art.
A first aspect of the present invention provides a fuel tank structure comprising:
the box body is provided with an oil port;
the oil liquid pushing device is arranged in the box body and can be switched between a first state and a second state;
the first valve is arranged on the box body and is suitable for being opened or closed;
when the oil pushing device is switched from the second state to the first state, the oil pushing device can push the oil in the box body to the oil port, and the first valve is opened to discharge the gas in the box body.
According to the oil tank structure provided by the invention, the oil pushing device is arranged as an air bag, and the oil tank structure further comprises:
and the inflation assembly is in conductive connection with the air bag.
According to the fuel tank structure provided by the invention, the first valve comprises:
the valve body is internally provided with a first exhaust channel which is used for communicating the outside of the valve body with the inside of the box body;
the first valve core is slidably arranged in the first exhaust channel;
and the first elastic piece is arranged between the valve body and the first valve core to provide acting force for enabling the first valve core to close the first exhaust channel.
According to the oil tank structure provided by the invention, the valve body is internally provided with the first oil inlet channel for communicating an external oil source with the inside of the tank body;
the second valve core is slidably arranged in the first oil inlet channel;
and the second elastic piece is arranged between the valve body and the second valve core so as to provide acting force for enabling the second valve core to close the first oil inlet channel.
According to the oil tank structure provided by the invention, the valve body is internally provided with the third exhaust channel for communicating the outside of the valve body with the inside of the tank body;
when the valve body moves out of the box body to a preset position, the third exhaust channel is conducted.
According to the oil tank structure provided by the invention, the oil port is internally provided with the flow guide structure which enables oil to flow into the tank body along the side wall of the tank body.
According to the oil tank structure provided by the invention, the flow guiding structure comprises a plurality of damping plates which are sequentially arranged, a plurality of small holes are uniformly distributed on the damping plates, the small holes between adjacent damping plates are communicated in a staggered manner, and the direction of the small holes close to the damping plates in the oil tank is inclined from the center of the oil tank to the side wall of the oil tank so as to guide oil to flow into the oil tank along the side wall of the oil tank.
According to the oil tank structure provided by the invention, a 1-2mm gap is arranged between the damping plates to form a buffer space for buffering oil flowing through the buffer space.
A second aspect of the present invention provides a hydraulic control system including:
the oil tank is of the oil tank structure;
the telescopic oil cylinder is used for driving the working machine to work and comprises a rod cavity and a rodless cavity;
the third oil port is communicated with the oil port through an oil inlet path, a first one-way valve is arranged on the oil inlet path, and the first one-way valve is communicated from the oil port to the direction of the third oil port;
the fourth oil port is communicated with the oil port through an oil return path;
the electronic control reversing valve can be switched between a first valve position and a second valve position;
in the first valve position, the first oil port is communicated with the third oil port, and the second oil port is communicated with the fourth oil port;
in the second valve position, the first oil port is communicated with the fourth oil port, and the second oil port is communicated with the third oil port.
The hydraulic control system provided by the invention further comprises:
the pressure sensor is arranged in the oil liquid pushing device;
an alarm;
and the controller is respectively and electrically connected with the pressure sensor and the alarm and is used for controlling the alarm to send out corresponding alarm signals according to the pressure signals generated by the pressure sensor.
A third aspect of the invention provides a work machine comprising a boom structure comprising a tank structure as described above or a hydraulic control system as described above.
The beneficial effects are that: the oil tank structure provided by the invention comprises a tank body, an oil pushing device and a first valve, wherein the oil pushing device is arranged in the tank body, the oil pushing device can be switched between an expansion state and a compression state, the first valve is arranged on the tank body and is suitable for being opened or closed, the oil pushing device is additionally arranged in the tank body, and the first valve is arranged at the same time, when an oil port is relatively not arranged at the bottom of the oil tank, the working principle of the oil pushing device is utilized, the oil pushing device is switched from the compression state to the expansion state, the oil in the tank body is pushed to the position of the oil port, and the first valve is used for exhausting, so that the oil in the tank body is always gathered at the oil port when the oil tank is in any position, and smooth oil supply of the oil tank is ensured.
Further, in the hydraulic control system provided by the present invention, since the oil tank structure as described above is provided, various advantages as described above are also provided.
Further, the working machine according to the present invention includes the hydraulic control system described above, and thus has various advantages as described above.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a prior art oil port positioned opposite the top of an oil tank;
FIG. 2 is a schematic diagram of a cross-sectional structure of a fuel tank with an accumulator in a compressed state in accordance with an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the tank with the accumulator in an expanded state in accordance with an embodiment of the present invention;
FIG. 4 is a schematic three-dimensional view of a first valve according to an embodiment of the present invention;
FIG. 5 is an enlarged view of part A of FIG. 3;
FIG. 6 is a cross-sectional view of a first valve according to an embodiment of the present invention;
FIG. 7 is an enlarged view of part B of FIG. 3;
FIG. 8 is an electrical schematic of a hydraulic control system in an embodiment of the invention;
fig. 9 is a schematic diagram of a state that an oil tank structure is mounted on an arm support according to an embodiment of the invention.
Reference numerals:
1. a case; 111. oil liquid; 2. an oil port; 3. an air bag; 4. a first valve; 41. a valve body; 42. a first exhaust passage; 43. a first valve core; 44. a first spring; 45. a first oil inlet passage; 451. an oil filling port; 46. a second valve core; 47. a second spring; 48. a third exhaust passage; 49. a fourth exhaust passage; 481. an exhaust end; 5. a flow guiding structure; 51. a first damping plate; 52. a second damping plate; 6. a telescopic oil cylinder; 7. an electric control reversing valve; 71. a first oil port; 72. a second oil port; 73. a third oil port; 74. a fourth oil port; 75. a first one-way valve; 76. a hydraulic pump; 77. an oil inlet path; 78. an oil return path; 8. arm support; 9. a conical space; 10. an annular oil inlet passage; 11. a pressure sensor; 12. an alarm; 13. a controller; 14. and a second one-way valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "horizontal", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
At present, the position form of an oil tank for supplying oil to a working machine is usually fixed, the oil outlet of the oil tank is always arranged at the bottom of the oil tank relatively, and oil in the oil tank is gathered at the oil outlet at the bottom by utilizing the action of gravity, so that the oil supply of the oil tank is ensured to be smooth.
In some cases, when the position of the oil tank changes with the attached carrier, there is a change in the position of the oil outlet relative to the oil tank, for example, when the carrier attached to the oil tank is turned upside down, the oil outlet is relatively arranged at the bottom of the oil tank, and is relatively arranged at the top of the oil tank, or when the carrier attached to the oil tank is turned upside down, the oil outlet is relatively arranged at the bottom of the oil tank, and is relatively arranged at the side of the oil tank.
As shown in figure 1, the oil tank is arranged on a part of the working machine, the part can change the pose of 0-185 degrees in space, if the part is lifted upwards, the oil outlet is relatively arranged at the bottom of the oil tank, the oil 111 in the oil tank can be always gathered at the oil outlet, but when the part falls downwards, the oil tank can be in the state shown in figure 1, the oil outlet is relatively arranged at the top of the oil tank, and at the moment, the oil 111 is not gathered in the oil outlet.
Under the above circumstances, the oil 111 in the oil tank cannot be always gathered at the oil outlet due to the gravity, which results in the oil tank not being supplied smoothly and the oil pump being damaged.
According to the embodiment of the invention, the oil pushing device is additionally arranged in the tank body, and the first valve is arranged at the same time, so that when the oil port is relatively not arranged at the bottom of the oil tank, the working principle of the oil pushing device is utilized, the oil pushing device is switched from a compressed state to an expanded state, the oil in the tank body is pushed to the position of the oil port, and the first valve is used for exhausting, so that the oil in the tank body is always gathered at the oil port when the oil tank is in any position, and smooth oil supply of the oil tank is ensured.
The tank structure, the hydraulic control system, and the work machine of the present invention are described below with reference to fig. 2 to 9.
As shown in fig. 2 to 6, the oil tank structure in the embodiment of the invention includes a tank body 1, an oil pushing device and a first valve 4, an oil port 2 is provided on the tank body 1, the oil pushing device is provided in the tank body 1, the oil pushing device can be switched between a first state and a second state, the first valve 4 is provided on the tank body 1, the first valve 4 is suitable for being opened or closed, when the oil pushing device is switched from the second state to the first state, the oil pushing device can push the oil 111 in the tank body 1 to the position of the oil port 2, and the first valve 4 is opened to discharge the gas in the tank body 1.
Specifically, the tank body 1 of the oil tank may be a square tank body or a round tank body, the oil pushing device may be a piston structure or an energy accumulator, the energy accumulator may be an air bag type or a diaphragm type, and thus the first state of the oil pushing device is an expansion state, the second state is a compression state, the first valve 4 may be an electromagnetic valve, the first valve 4 may be multiple, and the above components may be selected without limitation in this embodiment.
Further, in some embodiments, the tank body 1 is a circular tank body, two first valves 4 are uniformly distributed on the circumferential surface of the tank body 1, the circumferential angle between the two first valves 4 is 180 °, and when the pose of the oil tank is changed from 0 ° to 185 °, one valve is always positioned at the upper part of the oil tank, so that the feasibility of exhaust is ensured.
As shown in fig. 1, when the position of the oil port 2 is relatively set at the top of the oil tank, the air density in the oil tank is low, the air stays at the upper part of the oil tank, the oil supply is not smooth, at this time, the oil pushing device is switched from the compressed state to the expanded state to push the oil 111 to the oil port 2 of the oil tank, at this time, the air pressure in the oil tank increases, the first valve 4 is opened, and the air in the oil tank 1 is discharged from the first valve 4 in the lifting process along with the pushing of the oil 111.
According to the embodiment of the invention, the oil pushing device is additionally arranged in the tank body 1, and the first valve 4 is arranged at the same time, so that when the oil port 2 is not arranged at the bottom of the oil tank relatively, the oil pushing device is switched from a compressed state to an expanded state by utilizing the working principle of the oil pushing device, the oil 111 in the tank body 1 is pushed to the position of the oil port 2, and the first valve 4 is used for exhausting, so that the oil 111 in the tank body 1 is always gathered at the oil port 2 when the oil tank is in any position, and smooth oil supply of the oil tank is ensured.
As shown in fig. 4 to 6, in some embodiments of the present invention, the first valve 4 includes a valve body 41, a first exhaust passage 42, a first valve core 43, and a first elastic member, the first exhaust passage 42 is formed in the valve body 41, the first exhaust passage 42 is used for communicating the outside of the valve body 41 with the inside of the case 1, the first valve core 43 is slidably disposed in the first exhaust passage 42, and the first elastic member is disposed between the valve body 41 and the first valve core 43 to provide a force for closing the first valve core 43 to the first exhaust passage 42.
Specifically, the first valve core 43 is used for controlling the first exhaust channel 42 to switch between an open state and a closed state, the first elastic member may be a spring or a compression spring, in this embodiment, the first elastic member is a first spring 44, one end of the first exhaust channel 42 is in a tapered channel, the first valve core 43 is also a tapered valve core, and is adapted to the tapered channel in the first exhaust channel 42, the diameter size of the tapered channel gradually increases from the inside to the outside of the tank 1, the first spring 44 acts on one end of the large diameter size of the first valve core 43, the first valve core 43 is under the elastic force of the first spring 44, the first exhaust channel 42 is in a normally closed state, when the air pressure intensity in the tank 1 can overcome the elastic force of the first spring 44, the first valve core 43 is pushed to slide outwards, the tapered channel of the first exhaust channel 42 is opened, when the air pressure intensity in the tank 1 is insufficient to overcome the elastic force of the first spring 44, the first valve core 43 slides inwards by the elastic force of the first spring 44, and the first valve core 43 is ensured to leak oil liquid 111 in the tank 1. Through setting up slidable first case 43 and first spring 44 in first exhaust passage 42, realized that first valve 4 is automatic to be discharged, simultaneously, when the inside oil pressure of oil tank is too high, also can protect thin wall box structure through first exhaust passage 42 pressure release. The elastic force of the first spring 44 can be adjusted according to the volume of the tank 1, the volume of the oil 111, and the air pressure of the gas generated in the tank 1 during the use, which will not be described herein.
As further shown in fig. 6, in some embodiments of the present invention, the first valve 4 further includes a first oil inlet channel 45, a second valve core 46, and a second elastic member, wherein the first oil inlet channel 45 is formed in the valve body 41 and is used for communicating an external oil source with the interior of the tank 1, the second valve core 46 is slidably disposed in the first oil inlet channel 45, and the second elastic member is disposed between the valve body 41 and the second valve core 46, so as to provide a force for closing the first oil inlet channel 45 by the second valve core 46, and opening and closing of the first oil inlet channel 45 are also automatically implemented.
Specifically, the second elastic member is a second spring 47, the second spring 47 acts on the second valve element 46, and the second valve element 46 has a sliding tendency to switch from the open state to the closed state under the elastic force of the second spring 47.
The one end of first oil feed passageway 45 is the oiling mouth 451 for connect external oil source, to the inside oiling of box 1, the other end and the inside intercommunication of box 1 of first oil feed passageway 45, the shape that the one end of first oil feed passageway 45 is close to oiling mouth 451 is the toper passageway, second case 46 is the toper case too, and with the toper passageway looks adaptation in the first oil feed passageway 45, the diameter size of toper passageway is by oiling mouth 451 to the inside increase of box 1 gradually, the second spring 47 acts on the one end of second case 46 major diameter size, second case 46 receives the elastic force of second spring 47, first oil feed passageway 45 is in the normal close state, when needs to the inside oiling of box 1, outside oil source flows to the passageway through oiling mouth 451, the elastic force of outside oil source's oil pressure overcomes the second spring 47, second case 46 slides downwards, the toper passageway of first oil feed passageway 45 just opens, oiling 111 gets into box 1, when outside oil source stops, the diameter size of toper passageway increases by the elasticity of second spring 47, second case 46 is upwards slided by the elastic force of second spring 47, first case 46 receives the elastic force of second spring 47, it is closed to the first case 45 to open the outside oil source, the outside oil feed passageway 45 is closed in the here, the first case 45 is opened by the outside oil pressure is big, the outside oil pressure of first case 45 has been opened according to the fact that the first case is big, the outside spring is opened, the outside is can be opened to the outside automatically is opened, and the valve is opened is can be opened to the outside and the outside is more than the case is opened to the spring is had.
As further shown in fig. 6, in order to further simplify the structure of the first valve 4 and also save processing steps, in other embodiments of the present invention, a part of the first exhaust passage 42 and the first oil inlet passage 45 together, specifically: the first exhaust passage 42 is arranged at one side of the first oil inlet passage 45, one end of the first exhaust passage 42 is communicated with the first oil inlet passage 45, the other end of the first exhaust passage 42 is communicated with the outside of the valve body 41, the elastic force of the second spring 47 is larger than the oil pressure of an external oil gun, when the first oil inlet passage 45 is filled with oil, the second valve core 46 is not pushed open, when the oil is filled, the first exhaust passage 42 is closed, that is, the first oil inlet passage 45 and the first exhaust passage 42 share the lower half passage in the figure, the oil inlet passage and the exhaust passage are integrated together, so that the first valve 4 is integrated with the functions of exhausting, pressure relief and oil filling, the structure of the first valve 4 is simplified, the volume of the valve is reduced, and the processing procedure is saved.
As shown in fig. 5, in some embodiments of the present invention, a third exhaust channel 48 is further formed in the valve body 41, for communicating the outside of the valve body 41 with the inside of the case 1, and when the valve body 41 is moved out of the case 1 to a preset position, the third exhaust channel 48 is conducted for exhausting.
Specifically, the valve body 41 is in threaded connection with the box body 1, and is sealed through a sealing gasket, a third exhaust channel 48 and a fourth exhaust channel 49 are further arranged in the valve body 41, one end of the third exhaust channel 48 is an exhaust end 481, the exhaust end 481 is arranged on the side wall of the valve body 41 and is located on the outer side of the threads of the valve body 41, the other end of the third exhaust channel 48 is communicated with the first oil inlet channel 45, one end of the fourth exhaust channel 49 is communicated with the first oil inlet channel 45, and the other end of the fourth exhaust channel 49 is arranged on the side wall of the valve body 41 and is located on the inner side of the threads of the valve body 41.
When the oil filling of the oil tank is completed, the oil pushing device is in a compressed state, the first exhaust channel 42 in the first valve 4 is in a closed state, a small amount of gas is accumulated at the top in the tank body 1, the small amount of gas is accumulated at the threaded connection position between the valve body 41 and the tank body 1 through the third exhaust channel 48, the first oil inlet channel 45 and the fourth exhaust channel 49, at this time, the valve body 41 is manually screwed out, and when the exhaust end 481 of the third exhaust channel 48 is screwed out to a position where the exhaust end 481 can be communicated with the outside, the third exhaust channel 48, the first oil inlet channel 45 and the fourth exhaust channel 49 are communicated to discharge a small amount of gas accumulated at the threaded connection position between the valve body 41 and the tank body 1, so that poor tightness is avoided due to the existence of air pressure between the valve body 41 and the tank body 1. In order to accelerate the exhaust efficiency, the third exhaust passage 48 and the fourth exhaust passage 49 may be provided in plurality and uniformly distributed along the circumferential direction of the valve body 41.
As further shown in fig. 5, in some embodiments of the present invention, a conical space 9 is further provided between the valve body 41 and the tank 1, the other end of the first oil inlet channel 45 is communicated with the conical space 9, the conical space 9 is communicated with the interior of the tank 1 through an annular oil inlet channel 10, the annular oil inlet channel 10 is an annular channel arranged at the top of the tank 1, the oil 111 entering through the first oil inlet channel 45 is firstly sprayed in the conical space 9, buffered in the conical space 9, and then flows into the tank 1 through the annular oil inlet channel 10, so that the oil 111 is prevented from being directly sprayed on the oil pushing device to damage the oil pushing device.
As shown in fig. 3, in some embodiments of the present invention, a flow guiding structure 5 is disposed in the oil port 2, and is used for guiding the oil 111 in the flow inlet 2, so that the oil 111 flows into the tank 1 along the sidewall of the oil tank, and damage to the oil pushing device during the injection process of the oil 111 is avoided. In other embodiments of the present invention, the flow guiding structure 5 may be a flow guiding cavity connected to the oil port 2, where the flow guiding cavity is in an hourglass shape, and the flow guiding cavity is provided with an oil hole inclined toward the sidewall of the tank 1, and the flowing oil 111 enters the flow guiding cavity to buffer, and then is guided to spray toward the sidewall of the tank 1 through the inclined oil hole, so as to avoid damage to the oil pushing device during the spraying process of the oil 111.
In other embodiments of the present invention, as shown in fig. 7, the flow guiding structure 5 includes a plurality of damper plates sequentially arranged, a plurality of small holes are uniformly distributed on the damper plates, the small holes between adjacent damper plates are all in staggered communication, and the direction of the small hole close to the damper plate in the oil tank is inclined from the center of the oil tank to the side wall of the oil tank so as to guide the oil 111 to flow into the tank body 1 along the side wall of the oil tank.
Specifically, in this embodiment, the flow guiding structure 5 includes a first damping plate 51 and a second damping plate 52 that are sequentially disposed up and down, the small holes on the first damping plate 51 may be straight holes or inclined holes, the small holes on the second damping plate 52 are inclined holes, the inclined holes incline from the center of the oil tank to the side wall of the oil tank, and the diameters of the small holes are 0.3-2mm, so as to guide the oil 111 to flow into the tank body 1 along the side wall of the oil tank, and avoid damaging the oil pushing device in the injection process of the oil 111.
A gap of 1-2mm is further provided between the first damping plate 51 and the second damping plate 52 to form a buffer space for buffering the oil 111 flowing through the buffer space, so as to avoid the jet of the oil 111.
As shown in fig. 2 or fig. 3, in some embodiments of the present invention, the oil pushing device is provided as an air bag 3, the oil tank structure further includes an inflation component, and the inflation component is in conductive connection with the air bag 3 through an inflation pipeline and is used for inflating the air bag 3, the inflation component may be an air pump, the air pump is connected with an external air source, the air pump is used for inflating the air bag 3, and the air bag 3 is a high-strength rubber air bag, so that the air bag has extremely strong support and ductility.
In this embodiment, the process of switching between the inflated state and the compressed state of the air bag 3 is: when the position of the oil port 2 is relatively arranged at the top of the oil tank, the air density in the oil tank is low, the air stays at the upper part of the oil tank, air exists at the position of the oil port 2, at the moment, the air pump is started to inflate the air bag 3, so that the air bag 3 is inflated, the oil 111 in the tank body 1 is pushed to the position of the oil port 2, smooth oil supply is ensured, and when the oil is injected into the tank body 1, the air in the air bag 3 is released through the inflation pipeline, so that the oil gun can be filled into the tank body 1.
As shown in fig. 8, the second aspect of the present invention provides a hydraulic control system, which includes an oil tank, a telescopic oil cylinder 6 and an electric control reversing valve 7, the oil tank is of the oil tank structure described above, the telescopic oil cylinder 6 is used for driving a working machine to perform work, the electric control reversing valve 7 is provided with a first oil port 71, a second oil port 72, a third oil port 73 and a fourth oil port 74, the third oil port 73 is communicated with the oil port 2 through an oil inlet path 77, the oil inlet path 77 is provided with a first check valve 75 and a hydraulic pump 76, the first check valve 75 is communicated from the oil port 2 to the third oil port 73, and the fourth oil port 74 is communicated with the oil port 2 through an oil return path 78.
The electrically controlled reversing valve 7 can be switched between a first valve position and a second valve position, when the electrically controlled reversing valve is in the first valve position, the first oil port 71 is communicated with the third oil port 73, the second oil port 72 is communicated with the fourth oil port 74, when the electrically controlled reversing valve is in the second valve position, the first oil port 71 is communicated with the fourth oil port 74, the second oil port 72 is communicated with the third oil port 73, and the electrically controlled reversing valve 7 is a three-way four-position reversing valve.
As further shown in fig. 8, in some embodiments of the present invention, the hydraulic control system further includes a pressure sensor 11, an alarm 12 (not shown in the figure), and a controller 13 (not shown in the figure), where the pressure sensor 11 may be disposed in the air bag 3 or disposed on the inflation line, for detecting the air pressure in the air bag 3, and the controller 13 is electrically connected to the pressure sensor 11 and the alarm 12, respectively, and is used to control the alarm 12 to send a corresponding alarm signal according to the pressure signal generated by the pressure sensor 11.
In other embodiments, the second one-way valve 14 is arranged on the air charging pipeline of the air bag 3, and the second one-way valve 14 is communicated with the air pump in the direction of the air bag 3, that is, after the air pump charges the air with rated air pressure into the air bag 3, the air charging pipeline realizes the closing of the air bag 3 in the direction of the air pump.
The process of switching between the inflated state and the compressed state of the air bag 3 is as follows:
when the piston rods of the telescopic oil cylinders 6 are fully retracted and oil injection in the box body 1 is completed, the oil 111 in the box body 1 is the most, and the air bags 3 are compressed to a P2 state by the oil 111;
the piston rods of the telescopic cylinders 6 extend out completely, at the moment, the oil 111 in the box body 1 is minimum, and the air bags 3 can be released to the P1 state;
after the telescopic oil cylinder 6 works for a period of time, gas is gradually generated in the box body 1, a part of space in the box body 1 is occupied, the air bag 3 is continuously released to a P0 state along with the increase of the gas, and the P0 is a state after the air bag 3 is fully expanded.
As shown in fig. 9, a specific alarm control flow is:
a safe air pressure threshold delta P is set in the controller 13, and the range of delta P is 0.1-0.3Mpa;
when the controller 13 receives a pressure signal in the air bag 3 fed back by the pressure sensor 11 and the pressure signal is smaller than a pressure value when P0+ [ delta ] P, the controller 13 judges that the pressure in the box body 1 is too low, the controller 13 controls the alarm 12 to send out an alarm signal of too low pressure, the alarm signal can be voice prompt tone or prompt lamplight, and maintenance personnel can check whether oil ways and oil tanks leak or whether the air bag 3 has problems or not;
when the controller 13 receives the pressure signal in the air bag 3 fed back by the pressure sensor 11 and the pressure signal is larger than the pressure value when P2+ [ delta ] P, the controller 13 judges that the pressure in the box body 1 is too high, the controller 13 controls the alarm 12 to send out an alarm signal of the too high pressure, the alarm signal can be voice prompt tone or prompt lamplight, and a maintainer checks whether the first valve 4 has an exhaust problem or whether the oil tank has a problem. Through this alarm control flow, suggestion operating personnel overhauls the oil tank, promotes the reliability of oil tank.
The third aspect of the invention also provides a working machine, which comprises a boom structure, wherein the boom structure comprises the oil tank structure or the hydraulic control system, and the hydraulic control system drives the working machine to work.
As shown in fig. 9, the working machine may be a jib crane, the crane has a jib 8, the oil tank structure is arranged on the jib 8, when the oil tank structure turns over up and down or turns over along with the jib 8, and the oil tank structure is not arranged at the bottom of the oil tank relatively, the working principle of the air bag 3 is utilized, the air bag 3 is switched from a compression state to an expansion state, the oil 111 in the tank 1 is pushed to the position of the oil tank 2, and the gas is automatically exhausted through the first valve 4, so that smooth oil supply of the oil tank is ensured.
Meanwhile, the length of part of the arm support 8 of the operation machine can be 50-60m, an oil tank is arranged on the arm support 8, the weight of the arm support 8 can be increased, the overturning moment of the arm support 8 is increased, and the operation machine is easy to turn over.
The hydraulic control system can be arranged on the arm support 8, and the arm support 8 forms a complete control system capable of independently operating, so that the driving operation can be independently performed without depending on the total control system of the crane.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. An oil tank structure, comprising:
the box body (1) is provided with an oil port (2);
the oil liquid pushing device is arranged in the box body (1) and can be switched between a first state and a second state;
a first valve (4) provided on the case (1) and adapted to be opened or closed, the first valve (4) including: the valve comprises a valve body (41), wherein a first exhaust channel (42) is formed in the valve body (41), and the first exhaust channel (42) is used for communicating the outside of the valve body (41) with the inside of the box body (1); a first valve element (43) slidably disposed in the first exhaust passage (42); a first elastic member provided between the valve body (41) and the first valve element (43) to provide a biasing force that causes the first valve element (43) to close the first exhaust passage (42);
when the oil pushing device is switched from the second state to the first state, the oil pushing device can push oil (111) in the box body (1) to the oil port (2), and the first valve (4) is opened to discharge gas in the box body (1);
a first oil inlet channel (45) is also formed in the valve body (41) and is used for communicating an external oil source with the inside of the box body (1); a second spool (46) slidably disposed within the first oil intake passage (45); a second elastic member provided between the valve body (41) and the second spool (46) to provide a force for closing the first oil inlet passage (45) by the second spool (46);
a third exhaust channel (48) is further formed in the valve body (41) and used for communicating the outside of the valve body (41) with the inside of the box body (1); when the valve body (41) moves out of the box body (1) to a preset position, the third exhaust channel (48) is communicated;
the first exhaust channel (42) and the first oil inlet channel (45) are partially connected, a fourth exhaust channel (49) is further arranged in the valve body (41), one end of the fourth exhaust channel (49) is communicated with the first oil inlet channel (45), and the other end of the fourth exhaust channel (49) is arranged on the side wall of the valve body (41) and located on the inner side of a thread of the valve body (41).
2. The tank structure according to claim 1, characterized in that the oil pushing device is provided as an air bag (3), the tank structure further comprising:
and the inflation assembly is in conductive connection with the air bag (3).
3. The oil tank structure according to claim 1, characterized in that a flow guiding structure (5) is arranged in the oil port (2) so that oil (111) can flow into the tank (1) along the side wall of the tank (1).
4. A tank structure according to claim 3, wherein the flow guiding structure (5) comprises a plurality of damping plates which are sequentially arranged, a plurality of small holes are uniformly distributed on the damping plates, the small holes between adjacent damping plates are communicated in a staggered manner, and the direction of the small holes close to the damping plates in the tank is inclined from the center of the tank to the side wall of the tank so as to guide oil (111) to flow into the tank (1) along the side wall of the tank (1).
5. A hydraulic control system, comprising:
a fuel tank as claimed in any one of claims 1 to 4;
a telescopic cylinder (6);
the electric control reversing valve (7) is provided with a first oil port (71), a second oil port (72), a third oil port (73) and a fourth oil port (74);
the third oil port (73) is communicated with the oil port (2) through an oil inlet path (77), a first one-way valve (75) is arranged on the oil inlet path (77), and the first one-way valve (75) is communicated from the oil port (2) to the direction of the third oil port (73);
the fourth oil port (74) is communicated with the oil port (2) through an oil return channel (78);
the electric control reversing valve (7) can be switched between a first valve position and a second valve position;
wherein, in the first valve position, the first oil port (71) is communicated with the third oil port (73), and the second oil port (72) is communicated with the fourth oil port (74);
in the second valve position, the first oil port (71) is communicated with the fourth oil port (74), and the second oil port (72) is communicated with the third oil port (73).
6. The hydraulic control system of claim 5, further comprising:
the pressure sensor (11) is arranged in the oil pushing device;
an alarm (12);
and the controller (13) is respectively and electrically connected with the pressure sensor (11) and the alarm (12) and is used for controlling the alarm (12) to send out corresponding alarm signals according to the pressure signals generated by the pressure sensor (11).
7. A work machine, characterized in that it comprises a boom structure comprising a tank structure according to any of claims 1-4 or a hydraulic control system according to any of claims 5-6.
CN202311527241.7A 2023-11-16 2023-11-16 Oil tank structure, hydraulic control system and working machine Active CN117249126B (en)

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US6085771A (en) * 1998-10-29 2000-07-11 Eaton Corporation Two-stage fuel tank vapor recovery vent valve and method of making same
JP2003004155A (en) * 2001-06-19 2003-01-08 Kubota Corp Relief valve device for force-feed oil passage
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CN108331805A (en) * 2018-03-21 2018-07-27 江苏恒立液压科技有限公司 Closed hydraulic system and its adjustment method
CN212273170U (en) * 2020-07-28 2021-01-01 西安瑞信铁路设备有限公司 Pressure-controlled flow valve and railway turnout oiling device thereof
CN114517798A (en) * 2022-02-23 2022-05-20 三一重机有限公司 Hydraulic drive system and working machine
WO2023050660A1 (en) * 2021-09-29 2023-04-06 三一汽车制造有限公司 Oil drain valve, energy accumulation device, hydraulic system, and working machine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62196401A (en) * 1986-02-22 1987-08-29 Nobuyuki Sugimura Horizontal bladder type accumulator
US6085771A (en) * 1998-10-29 2000-07-11 Eaton Corporation Two-stage fuel tank vapor recovery vent valve and method of making same
JP2003004155A (en) * 2001-06-19 2003-01-08 Kubota Corp Relief valve device for force-feed oil passage
CN102072210A (en) * 2010-11-15 2011-05-25 中国船舶重工集团公司第七一○研究所 Anti-surge oil tank
CN104019085A (en) * 2014-06-17 2014-09-03 长沙中联消防机械有限公司 Leveling hydraulic system and engineering machinery
CN105134674A (en) * 2015-08-12 2015-12-09 兖州煤业股份有限公司 Hydraulic oil tank and engineering machinery employing same
CN108331805A (en) * 2018-03-21 2018-07-27 江苏恒立液压科技有限公司 Closed hydraulic system and its adjustment method
CN212273170U (en) * 2020-07-28 2021-01-01 西安瑞信铁路设备有限公司 Pressure-controlled flow valve and railway turnout oiling device thereof
WO2023050660A1 (en) * 2021-09-29 2023-04-06 三一汽车制造有限公司 Oil drain valve, energy accumulation device, hydraulic system, and working machine
CN114517798A (en) * 2022-02-23 2022-05-20 三一重机有限公司 Hydraulic drive system and working machine

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