CN113550940B

CN113550940B - Hydraulic oil tank capable of rapidly defoaming in use

Info

Publication number: CN113550940B
Application number: CN202110828469.4A
Authority: CN
Inventors: 孙艳; 刘伟善; 刘尔方; 徐逸诚; 许海烽
Original assignee: Jiangsu Yaokun Hydraulic Co ltd
Current assignee: Jiangsu Yaokun Hydraulic Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2023-09-15
Anticipated expiration: 2041-07-22
Also published as: CN113550940A

Abstract

The invention discloses a hydraulic oil tank capable of rapidly defoaming in use, which comprises a tank body, wherein a baffle plate is arranged in the tank body, an inner cavity of the tank body is divided into two cavities, namely an oil suction cavity and an oil return cavity, an oil return filter element and an oil suction filter element are respectively arranged in the oil suction cavity and the oil suction cavity, an oil outlet of the oil suction filter element is communicated with the oil suction cavity, an anti-shaking plate is arranged in the oil suction cavity and sleeved on the surface of the oil return filter element, and the anti-shaking plate can float on the oil surface in the oil return cavity; in order to avoid the phenomenon that the oil level of the tank body fluctuates in the use process, an anti-shaking plate is arranged on the oil level, and the fluctuation of the oil level can be inhibited to a certain extent through the anti-shaking plate, so that the probability of bubble generation in the use process of the tank body is reduced.

Description

Hydraulic oil tank capable of rapidly defoaming in use

Technical Field

The invention relates to the technical field of hydraulic tanks, in particular to a hydraulic tank capable of rapidly defoaming in use.

Background

The hydraulic technology has the advantages of high efficiency, flexible arrangement and the like, is widely applied to engineering machinery, and is one of key technologies of the engineering machinery, and the performance of the engineering machinery is determined. With the progress of modern scientific technology, hydraulic technology has become a necessary trend towards small volume, low cost, long service life, high degree of automation, high reliability, high precision and the like. Hydraulic systems typically include pumps, control valves, actuators, and hydraulic tanks. Hydraulic oil is sucked out of the hydraulic tank body through the pump, and then flows back to the hydraulic tank body through the control valve to achieve the function action of the machine by the executive component. Because the pressure and the flow rate change at all places of the circulation loop of the hydraulic system at any time, a large amount of bubbles are mixed in the hydraulic system, particularly the return oil has a large amount of visible bubbles, and the bubbles are rapidly dispersed in the whole hydraulic tank. Bubbles with larger diameters can quickly float upwards and escape from the liquid surface; most of the bubbles with smaller diameters cannot float and escape, and are sucked into the pump along with flowing oil liquid to reenter the whole hydraulic system. This is especially serious for engineering machinery in which the whole machine frequently shakes and vibrates at high frequency.

The damage of bubbles in oil to the whole hydraulic system is huge in terms of the working quality and economy of the system: 1. the system works poorly, the oil is mixed with bubbles, the compression ratio of the oil is increased, and the automatic control error is increased or the working device is out of order and intermittently moves. 2. The oil temperature rises, because the oil pressure of the hydraulic system is continuously circulated, the air bubbles are rapidly increased by the compression temperature, on the other hand, the thermal conductivity of the oil mixed with a large amount of air bubbles is greatly reduced, and the cooling effect is seriously affected. Adverse effects due to an increase in oil temperature: accelerating the oxidative deterioration of the oil, reducing the lubricating performance of the oil, accelerating the aging of the sealing element and increasing the occurrence of cavitation. 3. Low efficiency, and is prone to vibration and noise.

The conventional countermeasure at present: the bubbles are removed by utilizing a necessary box body in the hydraulic system, such as the horizontal sectional area is larger than the depth of the oil, one or more baffle plates are arranged to prolong the residence time of the oil in the box body, the distance between the oil inlet and the oil outlet is far as possible, the volume of the oil box is as large as possible, and the like. But the bubble removal effect is still poor;

the main principle of the method is that when the residence time of the oil in the tank body is longer, the possibility of collision among the bubbles is high, and the collided bubbles are broken, so that certain defoaming is performed on the inside of the oil tank;

in addition, another important factor of bubble generation in the middle of the hydraulic tank body is that in the use process of the hydraulic tank body, the tank body can shake, at this time, the oil level in the tank body can swing along with the shake of the tank body, and the liquid level fully contacts with air in the swing process, so that the quantity of bubble generation in liquid oil is improved, and therefore, the hydraulic oil tank capable of rapidly defoaming in use is provided.

Disclosure of Invention

The invention aims to provide a hydraulic oil tank capable of rapidly defoaming in use so as to solve the problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a hydraulic tank that can defoaming fast when using, includes the box, be provided with the baffle in the box, will the box inner chamber falls into two cavitys, is oil absorption chamber and oil return chamber respectively, oil return chamber and oil absorption intracavity portion are provided with oil return filter core and oil absorption filter core respectively, oil-out and outside intercommunication of oil absorption filter core, oil return intracavity portion is provided with prevents shaking the board, prevent shaking the board cover and be in oil return filter core's surface, and prevent shaking the board and float on the oil level of oil return intracavity, oil return intracavity portion still is provided with the oil box, the oil feed end of oil box with offer on the box go into the hydraulic fluid port intercommunication, the oil outlet end intercommunication of oil box has the multiunit to be in the spiral pipe around the oil return filter core, the inside hydraulic oil of oil box passes through the flow direction oil return chamber lower part.

Preferably, the top of the oil box is communicated with an oil delivery pipe, a thread ring is arranged on the oil delivery pipe, the thread ring is in threaded connection with an oil inlet of the box body, the top of the oil delivery pipe is positioned on the outer side of the box body, and a sealing plug is in threaded connection with the pipe orifice of the oil delivery pipe.

Preferably, the oil delivery ports with the same number as the spiral pipes are formed in the oil box, the oil box is communicated with the spiral pipes through the oil delivery ports, an annular plate is fixed at the bottom of the oil return filter element, the annular plate is penetrated at the bottom of the spiral pipes, and the oil outlet of the spiral pipes is located below the annular plate.

Preferably, an oil pipe communicated with the oil suction cavity is arranged at the bottom of the oil return filter element, a first mounting hole is formed in the partition plate, an inner threaded pipe is mounted on the first mounting hole, and oil pipe threads on the oil suction filter element are arranged on the inner threaded pipe.

Preferably, a flexible corrugated pipe is connected to the central position of the anti-shaking plate, a fixed shell is arranged at the top of the flexible corrugated pipe, the fixed shell is arranged at the top end position inside the oil return cavity, and the oil return filter element is positioned inside the flexible corrugated pipe;

the bottom of the anti-shaking plate is provided with a plurality of groups of floating balls.

Preferably, the outer ring of the anti-shake plate is provided with a vertical plate, and a region is formed between the vertical plate and the flexible corrugated pipe.

Preferably, the inside of oil box is provided with the plug that opens and shuts to defeated oil port, the plug is including being located the lift section of thick bamboo of oil box, the lift section of thick bamboo holding tank that holds lift section of thick bamboo reciprocates is seted up to the oil box bottom, the spring is installed to the bottom of lift section of thick bamboo, the spring of lift section of thick bamboo bottom is fixed in lift section of thick bamboo holding tank bottom, be provided with the direction telescopic link in the spring, the direction telescopic link respectively with lift section of thick bamboo bottom and lift holding tank fixed connection.

The sealing plug is positioned at one end of the oil delivery pipe, the bearing is rotationally connected with a connecting rod, and a third piston sheet is fixed at the bottom of the connecting rod and is abutted with the lifting cylinder;

the top position of the lifting cylinder is fixedly provided with a connecting frame, one end of the connecting frame, which is far away from the lifting cylinder, is fixedly provided with a fourth piston sheet, and the fourth piston sheet is abutted with the oil delivery port.

Preferably, the lifting cylinder is provided with a drainage cover on the outer surface, a drainage seat is arranged below the drainage cover, and the drainage seat is arranged in the oil box.

Preferably, a flexible rubber ring is arranged between the drainage cover and the drainage seat.

Preferably, a handle is fixed on one side of the sealing plug away from the oil delivery pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention firstly enlarges the oil path travel between the oil inlet and the oil outlet of the box body through the threaded pipe, thus reducing the generation rate of bubbles; in order to avoid the phenomenon that the oil level of the tank body fluctuates in the use process, an anti-shaking plate is arranged on the oil level, and the fluctuation of the oil level can be inhibited to a certain extent through the anti-shaking plate, so that the probability of bubble generation in the use process of the tank body is reduced.

2. The oil delivery pipe, the oil absorption filter element and the oil box are integrally arranged, so that the oil absorption filter element is arranged on the box body through the threaded ring, and the oil absorption filter element is convenient to detach and install.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the overall front view structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the case of the present invention;

FIG. 4 is a schematic view of the internal structure of the case in another orientation;

FIG. 5 is a schematic view of the front view of the inside of the case;

FIG. 6 is a schematic view of a part of a sectional structure of an anti-sloshing plate according to the present invention;

FIG. 7 is a schematic view of a partial cross-sectional structure of the oil cartridge of the present invention;

FIG. 8 is a schematic view of a partial main sectional structure of an oil cartridge of the present invention;

FIG. 9 is a schematic cross-sectional view of a occluding component of the present invention;

FIG. 10 is a schematic view of another angular cross-sectional structure of the cartridge;

FIG. 11 is a schematic cross-sectional view of the case of the present invention

FIG. 12 is a schematic view of another cross-sectional structure of the case of the present invention.

In the figure: 1-a box body; 2-a separator; 21-a first mounting hole; 22-threaded pipe; 3-an oil suction cavity; 31-an oil absorption filter element; 4-an oil return cavity; 41-an oil return filter element; 42-oil pipe; 5-an anti-shake plate; 51-a flexible bellows; 52-floating ball; 53-risers; 54-a fixed shell; 6-an oil box; 61-oil delivery pipe; 62-thread turns; 63-an oil conveying port; 64-an annular plate; 65-an oil inlet 7-a spiral pipe; 8-sealing plugs; 81-connecting rods; 82-a third piston plate; 9-a plug; 91-lifting cylinder; 910-a drainage cover; 911-drainage seat; 912-flexible rubber ring; 92-spring; 921-guiding a telescopic rod; 93-a lifting cylinder accommodating groove; 96-connecting frames; 97-fourth piston plate; 10-handle.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but 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.

Referring to fig. 1-12, the present invention provides a technical solution: the hydraulic oil tank capable of rapidly defoaming in use comprises a tank body 1, wherein a partition plate 2 is arranged in the tank body 1 to divide the inner cavity of the tank body 1 into two cavities, namely an oil suction cavity 3 and an oil return cavity 4, an oil return filter element 41 and an oil suction filter element 31 are respectively arranged in the oil return cavity 4 and the oil suction cavity 3, and an oil outlet of the oil suction filter element 31 is communicated with the outside;

the hydraulic oil in the back box 1 is filtered by the oil return filter 41, and the filtered hydraulic oil is sucked into the oil suction cavity 3 by the oil suction filter 31.

An anti-shaking plate 5 is arranged in the oil return cavity 4, the anti-shaking plate 5 is sleeved on the surface of the oil return filter element 41, and the anti-shaking plate 5 floats on the oil surface in the oil return cavity 4;

the anti-shaking plate 5 is made of a material with larger buoyancy, such as a rubber body or a foam plate, or can be of a plate structure with a hollow inside, and in addition, the edge of the anti-shaking plate 5 and the inner cavity surface of the oil return cavity 4 are arranged in a sliding manner, so that when the hydraulic oil surface fluctuates, the fluctuation of the oil surface is inhibited due to the existence of the anti-shaking plate 5.

The inside of oil return chamber 4 still is provided with oil box 6, the oil feed end of oil box 6 with offer and go up the oil inlet intercommunication on box 1, the oil outlet end intercommunication of oil box 6 has the multiunit to surround spiral pipe 7 around the oil return filter core 41, the inside hydraulic oil of oil box 6 flows to the oil return chamber 4 lower part through spiral pipe 7.

Firstly, hydraulic oil enters the spiral pipe 7 through the oil box 6 and finally flows to the bottommost end of the inner part of the oil return cavity 4, so that the stroke of the hydraulic oil can be improved, the contact area of the hydraulic oil with air when the hydraulic oil is injected into the box body 1 can be reduced, air bubbles are further prevented from being generated, and meanwhile, when some tiny air bubbles flow in the spiral pipe 7, the tiny air bubbles collide with each other to form large air bubbles, and when the tiny air bubbles flow out of the spiral pipe 7, the tiny air bubbles are filtered by the oil return filter element 41 more easily.

The top of the oil box 6 is communicated with an oil delivery pipe 61, a thread ring 62 is arranged on the oil delivery pipe 61, the thread ring 62 is in threaded connection with an oil inlet of the box body 1, the top of the oil delivery pipe 61 is positioned on the outer side of the box body 1, and a sealing plug 8 is in threaded connection with a pipe orifice of the oil delivery pipe 61.

The sealing plug 8 is arranged to facilitate the injection of hydraulic oil into the box 1.

The oil box 6 is internally provided with oil delivery ports 63 the same as the spiral pipes 7 in number, and the oil box 6 is communicated with the spiral pipes 7 through the oil delivery ports 63;

the bottom of the oil return filter element 41 is fixed with an annular plate 64, the bottoms of the spiral pipes 7 all penetrate through the annular plate 64, and the oil outlet of the spiral pipes 7 is located below the annular plate 64.

The annular plate 64 mainly supports the spiral pipe 7.

An oil pipe 42 communicated with the oil suction cavity 3 is arranged at the bottom of the oil return filter element 41;

the partition plate 2 is provided with a first mounting hole 21, an internal thread pipe 22 is mounted on the first mounting hole 21, and an oil pipe 42 on the oil suction filter element 31 is threaded on the internal thread pipe 22.

The hydraulic oil in the oil return cavity is first introduced into the oil suction cavity 3 through the oil return filter 41, so that the hydraulic oil is further filtered.

The center of the anti-shaking plate 5 is connected with a flexible corrugated pipe 51, a fixed shell 54 is arranged at the top of the flexible corrugated pipe 51, the fixed shell 54 is arranged at the top end position inside the oil return cavity 4, and the oil return filter element 41 is positioned inside the flexible corrugated pipe 51;

the bottom of the anti-shake plate 5 is provided with a plurality of groups of floating balls 52.

The effect of the floater 52 is to improve the buoyancy of the anti-sloshing plate 5 to in order to guarantee that the oil level will not appear in the central position of the anti-sloshing plate 5 is higher than the anti-sloshing plate 5, a flexible bellows which can be contracted is arranged between the anti-sloshing plate 5 and the oil return filter 41, and the flexible bellows can be folded under the action of the buoyancy and extend back under the gravity of the anti-sloshing plate 5, so that the anti-sloshing plate 5 can be guaranteed to be always positioned on the oil level.

The outer ring of the anti-shaking plate 5 is provided with a vertical plate 53, an area is formed between the vertical plate 53 and the flexible corrugated pipe 51, and the area is mainly a square column area surrounded by the anti-shaking plate 5 and the upturned vertical plate 53, so that the buoyancy of the anti-shaking plate 5 is mainly improved, and oil is prevented from entering the upper part of the anti-shaking plate 5.

Because the inner wall of preventing shaking board 5 and oil return cavity is sliding connection, so when the oil level has undulant, there is partial hydraulic oil to flow to the top of preventing shaking board 5 from preventing shaking board 5 and oil return cavity 4 in the gap between the inner wall, if the volume is more, will lead to whole prevent shaking board 5 gravity to be greater than its buoyancy at the hydraulic oil level, make it sink, in order to avoid this kind of phenomenon, will prevent shaking board 5's edge setting up riser 53, form a cavity between riser 53 and the flexible bellows, the cavity has the effect of certain separation like this.

The inside of oil drum 6 is provided with the stopper 9 that opens and shuts to oil transfer port 63, stopper 9 is including being located the lift section of thick bamboo 91 of oil drum 6, the lift section of thick bamboo holding tank 93 that holds lift section of thick bamboo 91 reciprocates is seted up to oil drum 6 bottom, spring 92 is installed to the bottom of lift section of thick bamboo 91, the spring 92 of lift section of thick bamboo 91 bottom is fixed in lift section of thick bamboo holding tank 93 bottom, be provided with direction telescopic link 921 in the spring 92, direction telescopic link 921 respectively with lift section of thick bamboo 91 bottom and lift holding tank 93 fixed connection.

The sealing plug 8 is positioned at one end of the oil delivery pipe 61, a connecting rod 81 is rotatably connected with a bearing, and a third piston 82 is fixed at the bottom of the connecting rod 81 and is abutted against the lifting cylinder 91;

the top position of the lifting cylinder 91 is fixed with a connecting frame 96, one end of the connecting frame 96 away from the lifting cylinder 91 is fixed with a fourth piston 97, the fourth piston 97 is abutted with the oil delivery ports 63, the connecting frame 96 comprises a plurality of branches, and each branch is matched with the plurality of oil delivery ports 63 one by one.

The drainage cover 910 is installed on the outer surface of the lifting cylinder 91, a drainage seat 911 is arranged below the drainage cover 910, and the drainage seat 911 is installed inside the oil box 6.

After the hydraulic oil is input, the sealing plug 8 is plugged into the pipe orifice of the oil conveying pipe 61, in order to ensure that the outside air enters the inside of the spiral pipe 7, the oil conveying port 63 is closed through the blocking piece 9, so that the outside air can only be located in the oil box 6 and cannot enter the inside of the spiral pipe 7, and the air content in the spiral pipe 7 is ensured.

A flexible rubber ring 912 is arranged between the drainage cover 910 and the drainage seat 911.

A handle 10 is fixed on the side of the sealing plug 8 away from the oil delivery pipe 61.

When the oil return filter 41 needs to be disassembled, the end part of the oil delivery pipe 61 positioned on the outer side of the box body 1 is rotated, and the threaded ring 62 is integrally arranged with the oil pipe 42, so that the threaded ring 62 is driven to rotate by the rotation of the oil delivery pipe 61, the oil pipe 42 at the bottom of the oil return filter 41 is driven to rotate while the threaded ring 62 rotates, and when the threaded ring 62 is separated from the box body 1, the oil pipe 42 is separated from the threaded pipe 22, so that the disassembly of the oil return filter 41 is realized.

The principle of how the blocking piece 9 seals the oil delivery port 63 is further described, firstly, the spring 92 is in a normal state, hydraulic oil flows from the top of the lifting cylinder 91 to the drainage cover 910 and the drainage seat 911 in sequence, finally, the hydraulic oil is drained to a liquid outlet position, after oil injection is finished, the piston with the connecting rod 81 is inserted into the oil box 6, at the moment, the third piston 82 at the end part of the connecting rod 81 is in contact with the lifting cylinder 91, in the process of rotating the sealing plug 8, the third piston 82 presses the lifting cylinder 91, the lifting cylinder 91 moves downwards under the action of the connecting rod 81, the lifting cylinder 91 moves downwards to drive the fourth piston 97 at the end part of the connecting frame 96, and finally, the oil delivery port 63 is sealed to a certain degree through the extrusion of the fourth piston 97;

here, it is necessary to introduce the amount of oil injected into the tank 1, i.e., the hydraulic oil level is lower than the bottom surface of the oil tank 6;

in addition, because the end of the connecting rod 81 is connected with the top of the oil delivery pipe 61 by screw, the connecting rod can play a certain limiting role on the spring 92 to prevent the spring 92 from resetting, when the sealing plug 8 is taken out from the pipe orifice of the oil delivery pipe 61, the connecting rod 81 is separated from the lifting cylinder 91, the lifting cylinder 81 is reset under the action of the spring 92, and at the moment, the fourth piston 97 is separated from the oil delivery port 63.

As to why the blocking member 9 needs to seal the oil feed port 63, there is also a reason that, in normal practice, the hydraulic oil tank needs to be subjected to an oil change treatment inside the oil tank after a certain degree of use, and in the course of the oil change, in order to ensure that the outside air does not enter the spiral pipe 7, it is sealed by the blocking member 9.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hydraulic tank that can defoaming fast when using, includes box (1), be provided with baffle (2) in box (1), will box (1) inner chamber divide into two cavitys, are oil absorption chamber (3) and oil return chamber (4) respectively, its characterized in that: an oil return filter element (41) and an oil suction filter element (31) are respectively arranged in the oil return cavity (4) and the oil suction cavity (3), and an oil outlet of the oil suction filter element (31) is communicated with the outside;

an anti-shaking plate (5) is arranged in the oil return cavity (4), the anti-shaking plate (5) is sleeved on the surface of the oil return filter element (41), and the anti-shaking plate (5) floats on the oil surface in the oil return cavity (4);

the oil return cavity (4) is internally provided with an oil box (6), the oil inlet end of the oil box (6) is communicated with an oil inlet (65) formed in the box body (1), the oil outlet end of the oil box (6) is communicated with a plurality of groups of spiral pipes (7) surrounding the oil return filter element (41), and hydraulic oil in the oil box (6) flows to the lower part of the oil return cavity (4) through the spiral pipes (7);

the top intercommunication of oil box (6) has defeated oil pipe (61), just be provided with screw thread circle (62) on defeated oil pipe (61), screw thread circle (62) threaded connection is in on the oil inlet of box (1), just the top of defeated oil pipe (61) is located the outside of box (1), defeated oil pipe (61) mouth of pipe department threaded connection has sealing plug (8).

2. A hydraulic oil tank capable of rapidly defoaming in use according to claim 1, wherein: the oil box (6) is internally provided with oil delivery ports (63) the same as the spiral pipes (7), and the oil box (6) is communicated with the spiral pipes (7) through the oil delivery ports (63);

the bottom of oil return filter core (41) is fixed with annular plate (64), the bottom of spiral pipe (7) all passes annular plate (64), just the play oil department of spiral pipe (7) is located the below of annular plate (64).

3. A hydraulic oil tank capable of rapidly defoaming in use according to claim 2, wherein: an oil pipe (42) communicated with the oil suction cavity (3) is arranged at the bottom of the oil return filter element (41);

the partition plate (2) is provided with a first mounting hole (21), an internal thread pipe (22) is mounted on the first mounting hole (21), and an oil pipe (42) on the oil suction filter element (31) is threaded on the internal thread pipe (22).

4. A hydraulic oil tank capable of rapidly defoaming in use according to claim 1, wherein: the center of the anti-shaking plate (5) is connected with a flexible corrugated pipe (51), a fixed shell (54) is arranged at the top of the flexible corrugated pipe (51), the fixed shell (54) is arranged at the top end position inside the oil return cavity (4), and the oil return filter element (41) is positioned inside the flexible corrugated pipe (51);

the bottom of the anti-shaking plate (5) is provided with a plurality of groups of floating balls (52).

5. The hydraulic oil tank capable of rapidly defoaming in use according to claim 4, wherein: the outer ring of the anti-shaking plate (5) is provided with a vertical plate (53), and a region is formed between the vertical plate (53) and the flexible corrugated pipe (51).

6. A hydraulic oil tank capable of rapidly defoaming in use according to claim 1, wherein: the oil box is characterized in that a blocking piece (9) for opening and closing the oil delivery port (63) is arranged in the oil box (6), the blocking piece (9) comprises a lifting cylinder (91) positioned in the oil box (6), a lifting cylinder accommodating groove (93) for accommodating the lifting cylinder (91) to move up and down is formed in the bottom of the oil box (6), a spring (92) is arranged at the bottom of the lifting cylinder (91), the spring (92) at the bottom of the lifting cylinder (91) is fixed at the bottom of the lifting cylinder accommodating groove (93), a guiding telescopic rod (921) is arranged in the spring (92), and the guiding telescopic rod (921) is fixedly connected with the bottom of the lifting cylinder (91) and the lifting cylinder accommodating groove (93) respectively;

the sealing plug (8) is positioned at one end of the oil delivery pipe (61), a connecting rod (81) is rotatably connected with a bearing, and a third piston sheet (82) is fixed at the bottom of the connecting rod (81) and is abutted with the lifting cylinder (91);

the top position of the lifting cylinder (91) is fixedly provided with a connecting frame (96), one end, away from the lifting cylinder (91), of the connecting frame (96) is fixedly provided with a fourth piston sheet (97), and the fourth piston sheet (97) is abutted with the oil delivery port (63).

7. The hydraulic oil tank capable of rapidly defoaming in use according to claim 6, wherein: the drainage cover (910) is arranged on the outer surface of the lifting cylinder (91), the drainage seat (911) is arranged below the drainage cover (910), and the drainage seat (911) is arranged inside the oil box (6).

8. A hydraulic oil tank for quick defoaming in use according to claim 7, wherein: a flexible rubber ring (912) is arranged between the drainage cover (910) and the drainage seat (911).

9. A hydraulic oil tank capable of rapidly defoaming in use according to claim 1, wherein: a handle (10) is fixed on one side of the sealing plug (8) far away from the oil delivery pipe (61).