Closable hydraulic system oil tank

Abstract

The utility model relates to the technical field of integrated hydraulic system oil tanks, in particular to a sealable hydraulic system oil tank which comprises an oil tank body, a liquid level meter is arranged at one end of the oil tank body, a one-way valve is arranged at one end of the top of the oil tank body, and a release valve is arranged at the other end of the top of the oil tank body. A pressure gauge is arranged at the top of the oil tank, and two conveying pipes are arranged at the output end of the oil tank. The oil tank can be adjusted and changed between an open state and a closed state, can be overturned and used under different conditions, and is simple in structure and low in failure rate.

Description

Technical Field

[0001] The utility model relates to the technical field of integral hydraulic system oil tanks, and particularly relates to a sealed hydraulic system oil tank. Background Technique

[0002] The hydraulic system oil tank is an important component in the hydraulic system, mainly responsible for storing and transporting hydraulic oil. Its design requirements include high strength, high temperature resistance, corrosion resistance, explosion protection and other functions. Generally, the hydraulic system oil tank is made of metal or plastic, and the inner wall is usually coated with an anti-adhesion coating to ensure the smooth flow of hydraulic oil.

[0003] However, in the current prior art, open or closed oil tanks are generally used in hydraulic systems; an open oil tank is equipped with an air filter; a closed oil tank does not require an air filter, but is provided with a folding device or a flexible isolator (pneumatic bladder type retractable) or a pressure type oil tank. However, in actual use, the folding device or the flexible isolator of the closed oil tank has poor reliability and is prone to abnormal conditions during operation, and the pressure type oil tank is prone to leakage. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sealed hydraulic system oil tank to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A sealed hydraulic system oil tank includes an oil tank. One end of the oil tank is provided with a liquid level gauge. One end of the top of the oil tank is provided with a one-way valve, and the other end of the top is provided with a relief valve. An air filter is arranged inside the oil tank. A pressure gauge is arranged on the top of the oil tank. Two delivery pipes are arranged at the output end of the oil tank.

[0007] As a preferred scheme of the utility model, the liquid level gauge is integrally formed with the outer wall of the oil tank and is communicated with the inside of the oil tank. The oil in the oil tank can flow into the liquid level gauge, and an observation window is arranged on the outer wall of the liquid level gauge.

[0008] As a preferred scheme of the utility model, one end of the one-way valve extends into the oil tank, and the other end is connected with the output end of an air injection pump through a pipeline. The air outlet end of the one-way valve is communicated with the air filter, and the upper air in the oil tank can freely enter and exit through the air filter.

[0009] As a preferred scheme of the utility model, one end of the relief valve extends into the upper air circulation area inside the oil tank, and the other end extends to the outside of the oil tank and is communicated with a collection box. The relief valve can set the pressure value to be borne and control the opening and closing of the relief valve through the change of air pressure.

[0010] As a preferred solution of the present utility model, one ends of the two conveying pipes both extend into the fuel tank, and are respectively used for returning oil and sucking oil to convey the oil liquid.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: In response to the problems raised in the background art, in this application, the fuel tank structure is enabled to be adjustable between an open type and a closed type. In the normal state, it operates through an air filter and is used as an open fuel tank for normal use. When the fuel tank needs to be displaced and flipped, the air filter is closed, and it is used as a closed fuel tank, and the working operation of the hydraulic system is realized by controlling the gas pressure in the fuel tank.

[0012] The present utility model realizes the adjustment and change of the fuel tank between the open state and the closed state, can meet the flipping use under different conditions, and has a simple structure and reduced failure rate. Description of the Drawings

[0013] Figure 1 It is a three-dimensional view of the overall structure of the present utility model;

[0014] Figure 2 It is a fuel tank system diagram of the present utility model.

[0015] In the figure: 1, fuel tank; 2, liquid level gauge; 3, one-way valve; 4, air filter; 5, pressure gauge; 6, release valve; 7, conveying pipe. Specific Embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Embodiment

[0017] Please refer to Figure 1-2, the present utility model provides a technical solution: a hermetic hydraulic system fuel tank, including a fuel tank 1. One end of the fuel tank 1 is provided with a liquid level gauge 2, which is used to detect the height of the oil in the fuel tank 1 and is convenient for observation (and a thermometer can be installed in the liquid level gauge 2 to detect the oil temperature). One end of the top of the fuel tank 1 is provided with a one-way valve 3. Compressed air or nitrogen can be injected into the fuel tank 1 through the one-way valve 3 to change the air pressure intensity in the fuel tank 1. The other end of the top is provided with a relief valve 6, and the relief valve 6 can be opened when the pressure in the fuel tank 1 exceeds the set value to relieve the pressure. An air filter 4 is arranged inside the fuel tank 1, and the air filter 4 can operate under normal working conditions (when the hydraulic system is working normally, the liquid level of the hydraulic system fuel tank can be automatically adjusted, and the upper air can freely enter and exit through the air filter 4, and dust will not enter the hydraulic system because of the air filter 4). When the hydraulic system needs to be flipped, the air filter 4 is closed to make the fuel tank 1 in a hermetic structure, and the air pressure intensity in the fuel tank 1 is controlled through the intake valve and the relief valve to meet the normal operation of the hydraulic system. A pressure gauge 5 is arranged on the top of the fuel tank 1, which is used to read the gas pressure in the fuel tank 1. Two delivery pipes 7 are arranged at the output end of the fuel tank 1, and the suction pipe and the return pipe can suck oil or return oil from the central area of the fuel tank 1 for circulation.

[0018] In this embodiment, all electrical components are controlled by a conventional controller.

[0019] For the embodiment, please refer to Figure 1-2 , the liquid level gauge 2 is integrally formed with the outer wall of the fuel tank 1 and is communicated with the inside of the fuel tank 1. The oil in the fuel tank 1 can flow into the liquid level gauge 2. An observation window is arranged on the outer wall of the liquid level gauge 2. One end of the one-way valve 3 extends into the fuel tank 1, and the other end is connected to the output end of the air injection pump through a pipeline. The air outlet end of the one-way valve 3 is communicated with the air filter 4. The upper air in the fuel tank 1 freely enters and exits through the air filter 4. One end of the relief valve 6 extends into the upper air circulation area in the fuel tank 1, and the other end extends outside the fuel tank 1 and is communicated with the collection box. The relief valve 6 can set the bearing air pressure value and control the opening and closing of the relief valve 6 through the change of air pressure. One end of each of the two delivery pipes 7 extends into the fuel tank 1 and is used as a return pipe and a suction pipe to transport the oil respectively. When in use, first, the air filter 4 is opened in the normal state so that the gas in the fuel tank 1 can flow through the air filter 4. At the same time, the impurities and dust in the gas are filtered when passing through the air filter 4. When the hydraulic system needs to be flipped, the air filter 4 is controlled to close through the PLC controller, and compressed air or pressure relief is injected into the fuel tank 1 through the one-way valve 3 and the relief valve 6 to control the gas pressure in the fuel tank 1 so as to meet the normal operation of the hydraulic system.

[0020] Working process of the utility model: When in use, first turn on the air filter 4 in the normal state so that the gas in the fuel tank 1 can flow through the air filter 4, and at the same time, the impurities and dust in the gas are filtered when passing through the air filter 4; when the hydraulic system needs to be flipped, the air filter 4 is controlled to close by the PLC controller, and compressed air or pressure relief is injected into the fuel tank 1 through the one-way valve 3 and the release valve 6 to control the gas pressure in the fuel tank 1 so as to meet the normal working use of the hydraulic system. The utility model realizes the adjustment and change between the open and closed states of the fuel tank, can meet the flipping use under different conditions, and has a simple structure and reduced failure rate.

[0021] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealed hydraulic system fuel tank, comprising a fuel tank (1), characterized in that: One end of the fuel tank (1) is provided with a liquid level gauge (2). One end of the top of the fuel tank (1) is provided with a check valve (3), and the other end of the top is provided with a relief valve (6). An air filter (4) is arranged inside the fuel tank (1). A pressure gauge (5) is arranged on the top of the fuel tank (1). Two delivery pipes (7) are arranged at the output end of the fuel tank (1).

2. The sealed hydraulic system fuel tank according to claim 1, characterized in that: The liquid level gauge (2) is integrally formed with the outer wall of the fuel tank (1) and is communicated with the inside of the fuel tank (1). The oil in the fuel tank (1) can flow into the liquid level gauge (2). An observation window is arranged on the outer wall of the liquid level gauge (2).

3. A sealed hydraulic system fuel tank according to claim 1, characterized in that: One end of the check valve (3) extends into the fuel tank (1), and the other end is connected to the output end of an air injection pump through a pipeline. The air outlet end of the check valve (3) is communicated with the air filter (4). The air in the upper part of the fuel tank (1) can freely enter and exit through the air filter (4).

4. A sealed hydraulic system fuel tank according to claim 1, characterized in that: One end of the relief valve (6) extends into the air circulation area above the inside of the fuel tank (1), and the other end extends outside the fuel tank (1) and is communicated with a collection tank. The relief valve (6) can set the pressure value to be withstood, and the opening and closing of the relief valve (6) are controlled by the change of air pressure.

5. A sealed hydraulic system fuel tank according to claim 1, characterized in that: One end of each of the two delivery pipes (7) extends into the fuel tank (1), and the oil is delivered by taking them as the oil return and oil suction respectively.

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