CN218207261U

CN218207261U - Closed hydraulic oil tank

Info

Publication number: CN218207261U
Application number: CN202222314686.4U
Authority: CN
Inventors: 朱营博; 刘浩泽; 曹永明; 王元宵
Original assignee: Tefulong Shanghai Technology Co ltd
Current assignee: Tefulong Shanghai Technology Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-01-03
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a closed hydraulic tank belongs to hydraulic pressure technical field, including cylinder (1), cylinder (1) one end is equipped with breathes mouth (11), and the other end is equipped with the business turn over hydraulic fluid port, cylinder (1) inner chamber is equipped with pressure regulating piston (2), and it falls into communicating oil storage chamber (3) that the business turn over is mouthfuled and air chamber (4) that communicate breathes mouth (11) with cylinder (1) inner chamber, in a certain embodiment, still is equipped with a relief valve (21) at least on pressure regulating piston (2) the utility model discloses not only can prevent hydraulic oil and air contact oxidation, can also avoid the pollutant to get into the oil storage chamber, but also can prevent the hydraulic oil of oil storage intracavity from breathing mouthful play, can also in time release pressure when the oil storage tank pressure is great.

Description

Closed hydraulic oil tank

Technical Field

The utility model belongs to the technical field of hydraulic pressure, particularly, relate to a closed hydraulic tank.

Background

The oil tank used in the hydraulic oil cylinder system is a place for storing hydraulic oil. When the hydraulic oil cylinder system works, as hydraulic oil is alternately injected into and flows out of an oil tank, the liquid level of the hydraulic oil in the oil tank alternately rises and falls, sometimes even violently disturbed, and the phenomenon is generally called as oil tank respiration. In order to adapt to the breathing of the oil tank, a breathing port communicated with the atmosphere is required to be arranged on the oil tank cover. The open type oil tank has the following defects: firstly, the hydraulic oil is also directly communicated with the atmosphere, which can accelerate the oxidation of the hydraulic oil; secondly, the application environment of the hydraulic oil tank contains a lot of pollutants such as raised sand, dust and the like, and the pollutants can enter the oil tank through the breathing port to pollute the hydraulic oil; thirdly, hydraulic oil can splash out of the oil tank due to a certain violent disturbance, fourthly, a large amount of bubbles can be generated to form foam when oil is discharged and pressure is relieved into the oil storage cavity rapidly, so that the foam liquid fluid presses oil to overflow from the breathing hole, the oil loss is caused, the environment is also polluted, and the oil quantity is not enough when the oil storage cavity is operated again.

Disclosure of Invention

To the above-mentioned problem that open oil tank exists among the prior art, the utility model provides a closed hydraulic tank, it is through setting up the piston in the oil storage chamber, and the piston can be when the oil mass changes, and is automatic according to the pressure adjustment position to hydraulic tank's safety in utilization has been improved.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

the utility model provides a closed hydraulic tank, includes the cylinder, cylinder one end is equipped with the mouth of breathing, and the other end is equipped with the business turn over hydraulic fluid port, the cylinder inner chamber is equipped with the pressure regulating piston, and it falls into the air chamber that the mouth was breathed in to intercommunication business turn over to the oil storage chamber and the intercommunication of intercommunication with the cylinder inner chamber.

By adopting the closed hydraulic oil tank of the technical scheme, under a normal state, the pressure in the oil storage cavity and the pressure in the air cavity are in a balanced state, the pressure in the air cavity is communicated through the atmosphere, and the air pressure is basically stable; when the actuating mechanism pumps oil from the oil storage cavity through the oil outlet, the liquid level in the oil storage cavity is lowered to generate negative pressure, under the action of pressure, the pressure regulating piston descends along with the liquid level, air enters the air cavity from the breathing port until the pressure in the oil storage cavity and the air cavity reach balance, and the pressure regulating piston stops moving; when the actuating mechanism discharges oil from the oil inlet to the oil storage cavity, the pressure in the oil storage cavity is larger than the air cavity, the pressure regulating piston rises along with the liquid level, and the air is discharged from the breathing port.

Preferably, at least one pressure relief valve is arranged on the pressure regulating piston. Because the pressure regulating piston can produce the negative pressure when moving up and down, when pressure reaches the threshold value, the relief valve is opened automatically and is discharged the negative pressure.

Preferably, two pressure relief valves are arranged on the pressure regulating piston and are symmetrically arranged.

Preferably, the periphery of the pressure regulating piston extends to form a sealing ring tightly attached to the inner cavity of the cylinder barrel. This definition may improve the sealing of the piston between the oil reservoir and the air chamber.

Preferably, one side of the pressure regulating piston facing the air cavity is provided with a boss, and an internal thread is arranged in the boss. This definition may be such that the piston is removed by a matching removal device.

Preferably, a hanging ring is arranged on the outer side of the cylinder barrel. This definition facilitates the transport of the closed hydraulic tank.

The utility model discloses following beneficial effect has:

1. owing to be equipped with the pressure regulating piston at the cylinder inner chamber, separate oil storage chamber and breathing opening, not only can prevent hydraulic oil and air contact, avoid the oxidation, can also avoid raising upward pollutants such as husky, dust and directly get into the oil storage chamber through breathing the opening, the pressure regulating piston can also prevent the hydraulic oil of oil storage intracavity from breathing the mouth spill moreover.

2. Because open hydraulic tank is when the pressure release in the twinkling of an eye, a large amount of hydraulic oil can get into the oil storage intracavity very fast, produces the foam easily, leads to it to spill over from breathing the mouth, consequently this application is under the condition that has set up pressure regulating piston and relief valve, can slow down the formation of foam through the negative pressure oppression foam that the oil storage intracavity produced in the twinkling of an eye, prevents to spill over, even can discharge through the relief valve is automatic when pressure surpasss a certain degree.

Drawings

Fig. 1 is a schematic structural diagram of a closed hydraulic oil tank according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a second embodiment of the closed hydraulic oil tank according to the present application.

The symbols in the figure illustrate: 1-cylinder barrel, 11-breathing opening, 12-air inlet, 13-air outlet, 14-lifting ring, 2-pressure regulating piston, 21-pressure relief valve, 22-sealing ring, 23-boss, 3-oil storage cavity and 4-air cavity.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

The first embodiment is as follows:

as shown in fig. 1, the present embodiment provides a closed hydraulic oil tank, which includes a cylinder barrel 1, a breathing port 11 communicated with the atmosphere is provided at the upper end of the cylinder barrel 1, an oil inlet and an oil outlet are provided at the lower end of the cylinder barrel, the present embodiment is provided with a pressure regulating piston 2 capable of moving up and down according to the pressure in the inner cavity of the cylinder barrel 1 aiming at the defects in the prior art, so that the inner cavity of the cylinder barrel 1 is divided into an oil storage cavity 3 communicated with an inlet and an outlet and an air cavity 4 communicated with the breathing port 11 by the pressure regulating piston 2.

The working principle is as follows: under the normal state, the pressure in the oil storage cavity 3 and the pressure in the air cavity 4 are in a balanced state (namely the pressure in the oil storage cavity 3 = the pressure in the air cavity 4 + the gravity of the pressure regulating piston 2), when the actuating mechanism pumps oil from the oil storage cavity 3 through an oil outlet, the liquid level in the oil storage cavity 3 descends to generate negative pressure, under the action of the pressure, the pressure regulating piston 2 descends along with the liquid level, air enters the air cavity 4 from the breathing port 11 to maintain the pressure of the air cavity 4, and the pressure regulating piston 2 stops moving until the pressure in the oil storage cavity 3 and the air cavity 4 reach balance; when the actuating mechanism discharges oil from the oil inlet into the oil storage cavity 3, the pressure in the oil storage cavity 3 is larger than that in the air cavity 4, the pressure regulating piston 2 rises along with the liquid level, and the air cavity 4 has a volume clearance which needs to discharge air from the breathing port 11 to maintain the pressure.

Preferably, in order to facilitate hoisting and transporting the fuel tank, a hanging ring 14 can be arranged outside the cylinder barrel 1, and specifically, the hanging ring 14 is arranged on the wall of the cylinder barrel 1 on one side of the breathing opening 11.

The sealing ring 22 tightly attached to the inner cavity of the cylinder barrel 1 extends out of the periphery of the pressure regulating piston 2, so that the thickness of the periphery of the pressure regulating piston 2 can be increased, pressure is prevented from flowing from the side edge, and the sealing performance between the oil storage cavity 3 and the air cavity 4 is improved.

Preferably, one side of the pressure regulating piston 2 facing the air chamber 4 is provided with a boss 23, and an internal thread is arranged in the boss 23. When the disassembly rod has an external thread matching the internal thread, the disassembly rod can be inserted into the boss, thereby facilitating the disassembly of the piston 2.

The second embodiment:

as shown in fig. 2, the improvement of this embodiment over the first embodiment is: at least one pressure relief valve 21 is arranged on the pressure regulating piston 2, and preferably, two pressure relief valves 21 are arranged and symmetrically distributed on the pressure regulating piston 2.

The closed hydraulic oil tank corresponding to the embodiment can solve the following special conditions: when the electric liquid actuating mechanism is at emergency switch valve, need discharge a large amount of hydraulic oil to the oil storage chamber 3 in the very short time, high-pressure hydraulic oil is inside can produce the bubble formation foam when sudden pressure release, and the foam is oppressed and slowed down to the negative pressure that produces in the hydraulic tank in this embodiment, prevents to spill over, and the pressure of its inside production can be discharged from relief valve 21 automatically when exceeding the trigger threshold value of relief valve 21 on the piston.

The closed hydraulic oil tank provided by the application is described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the methods of the present application and their core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. The utility model provides a closed hydraulic tank, includes cylinder (1), cylinder (1) one end is equipped with breathes mouth (11), and the other end is equipped with business turn over hydraulic fluid port, its characterized in that:

the inner cavity of the cylinder barrel (1) is provided with a pressure regulating piston (2) which divides the inner cavity of the cylinder barrel (1) into an oil storage cavity (3) communicated with an inlet and an outlet and an air cavity (4) communicated with a breathing port (11).

2. A closed hydraulic tank according to claim 1, characterized in that the pressure regulating piston (2) is provided with at least one pressure relief valve (21).

3. A closed hydraulic tank according to claim 2, characterized in that the pressure regulating piston (2) is provided with two pressure relief valves (21) and arranged symmetrically.

4. A closed hydraulic oil tank as defined in any one of claims 1-3, characterized in that a sealing ring (22) tightly attached to the inner cavity of the cylinder (1) extends around the pressure regulating piston (2).

5. A closed hydraulic tank according to claim 4, characterized in that the pressure regulating piston (2) is provided with a boss (23) on the side facing the air chamber (4), and the boss (23) is internally provided with an internal thread.

6. A closed hydraulic tank according to claim 1, characterized in that the cylinder barrel (1) is provided with a lifting ring (14) on the outside.