Closed supercharged hydraulic oil tank and liquid level display device

Abstract

The utility model relates to the technical field of hydraulic oil tanks, in particular to a closed supercharged hydraulic oil tank and liquid level display device, which comprises a cylinder barrel, a front end cover is fixedly connected to the left side of the cylinder barrel, a rear end cover is fixedly connected to the right side of the cylinder barrel, a spring is fixedly connected to the right side of the front end cover, and the spring is arranged to play a prepressing role. The front end cover of the hydraulic pump is fixedly connected with a spring, so that the hydraulic oil has a pre-pressure, an oil suction port of the hydraulic pump is pressurized, and the hydraulic pump sucks oil more easily. The end, away from the front end cover, of the spring is fixedly connected with a piston, and the bottom of the piston is fixedly connected with a sealing ring; the structure of the spring and the piston is adopted to isolate air, meanwhile, the change of the volume of oil in the hydraulic oil tank is met, meanwhile, due to the pre-pressing effect of the spring, hydraulic oil has pre-pressing force, the pressurization effect on an oil suction opening of the hydraulic pump is achieved, oil suction of the hydraulic pump is easier, air can be isolated outside, and the service life of the hydraulic pump is prolonged. Condensate water is prevented from entering the cylinder barrel to be mixed with hydraulic oil.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil tanks, in particular to a closed - type pressurized hydraulic oil tank and a liquid level display device. Background Technique

[0002] In a working environment with a relatively low temperature, at the moment when the hydraulic system starts and after the start when the temperature of the hydraulic oil has not reached the appropriate working range, due to the increase in the viscosity of the hydraulic oil, it is difficult for the hydraulic pump to suck oil. Because the viscosity of the hydraulic oil is too high, an effective oil film cannot be formed between the friction pairs of the hydraulic pump, which is extremely likely to cause damage to the hydraulic pump. Currently, the common practice is to add a heater inside the oil tank or use a pre - pressurized air filter. When using a heater to heat, since the hydraulic oil has a large viscosity and there is no circulating convection, a stepped temperature difference will be formed according to the distance from the heater. That is, the hydraulic oil close to the heater may be very hot, but the hydraulic oil farther away is still at a relatively low temperature. Among them, the hydraulic oil with a higher temperature is extremely likely to deteriorate and its performance will decline. Long - term use will easily reduce the service life of the hydraulic oil, and the consequence is that frequent maintenance or untimely maintenance will cause damage to the system. The method of using a pre - pressurized air filter is to apply a pressure to the hydraulic oil in the oil tank and press the hydraulic oil to the pump suction port, that is, to increase the pressure at the suction port, making it easier for the pump to suck oil. However, since the pre - pressurized air filter is still open to the atmosphere in essence, it will inevitably inhale condensed water, causing the emulsification of the hydraulic oil.

[0003] During use, the oil tank structure of traditional hydraulic systems is generally an open - type structure, and the oil tank is in communication with the atmosphere. Since this kind of oil tank is in direct contact with air, especially in an outdoor environment with large temperature differences and high humidity, condensed water is easily formed on the inner surface of the oil tank. As more and more condensed water is mixed into the hydraulic oil, the hydraulic oil is extremely likely to emulsify. The various performances of the emulsified hydraulic oil will be reduced, causing damage to the hydraulic pump, hydraulic valve, and actuating components inside the hydraulic system, resulting in great losses. Nowadays, hydraulic systems still play an irreplaceable role and have demands in many industries such as energy, metallurgy, and ports. Solving the emulsification of hydraulic oil is of crucial significance for improving the service life of hydraulic systems. Therefore, a closed - type pressurized hydraulic oil tank and a liquid level display device are proposed to solve the above - mentioned problems. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a closed - type pressurized hydraulic oil tank and a liquid level display device in view of the above - mentioned deficiencies in the prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A closed-type pressurized hydraulic oil tank and liquid level display device, including a cylinder barrel, a front end cover is fixedly connected to the left side of the cylinder barrel, a rear end cover is fixedly connected to the right side of the cylinder barrel, a spring is fixedly connected to the right side of the front end cover. The spring plays a preloading role, enabling the hydraulic oil to have a pre-pressure, which has a pressurizing effect on the oil suction port of the hydraulic pump, making it easier for the hydraulic pump to suck oil. One end of the spring away from the front end cover is fixedly connected to a piston, a sealing ring is fixedly connected to the bottom of the piston, and the sealing ring is slidably connected to the inner wall of the cylinder barrel. The number of the sealing rings is two, and the two sealing rings are fixedly connected to the upper and lower ends of the piston.

[0006] Preferably, a strong magnet is fixedly connected to the inner wall of the cylinder barrel. The strong magnet is used to drive the steel ball to move. A transparent tube is fixedly connected to the top of the cylinder barrel. A steel ball is movably connected inside the transparent tube, and the steel ball and the strong magnet are in the same vertical position.

[0007] Preferably, hydraulic oil is provided inside the cylinder barrel, and the hydraulic oil is provided between the right side of the piston and the left side of the rear end cover.

[0008] Preferably, a first clamping block is fixedly connected to the inner wall of the top of the cylinder barrel. A filter plate is clamped at the bottom of the first clamping block, and a second clamping block is clamped at the bottom of the filter plate. The second clamping block is clamped to the inner wall bottom of the cylinder barrel. The first clamping block and the second clamping block are provided to facilitate the disassembly of the filter plate, and the filter plate is provided to filter and isolate impurities.

[0009] Preferably, a pressing plate is fixedly connected to the left side of the spring, and a screw is threadedly connected inside the pressing plate. The number of the pressing plate and the screw is two, and they are provided on the left and right sides of the spring. The pressing plate presses the spring against the piston and the front end cover through the screw, and the piston will not rotate due to the fixing effect of the pressing plate when moving.

[0010] For the liquid level display device of the closed-type pressurized hydraulic oil tank, a drainage and ventilation port is opened on the left side of the cylinder barrel, and an oil discharge port, an oil return port, and an oil suction port are opened on the right side of the rear end cover.

[0011] The present utility model adopts the above technical solution, which can bring the following beneficial effects:

[0012] 1. For the closed-type pressurized hydraulic oil tank and liquid level display device, through the cooperation between the piston and the spring, by adopting the structure of the spring and the piston to isolate air while meeting the change of the oil volume inside the hydraulic oil tank. At the same time, due to the preloading effect of the spring, the hydraulic oil has a pre-pressure, which has a pressurizing effect on the oil suction port of the hydraulic pump, making it easier for the hydraulic pump to suck oil. It can isolate the air outside and prevent condensed water from entering the inside of the cylinder barrel and mixing with the hydraulic oil.

[0013] 2. For this closed-type pressurized hydraulic oil tank and liquid level display device, through the cooperation between the strong magnet and the steel balls, when the volume of the oil inside the tank changes, the position of the piston changes, and the position of the strong magnet also changes accordingly. The external steel balls move accordingly under the suction force of the strong magnet, and the liquid level inside the tank is displayed on the external transparent tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view of the present invention;

[0015] Figure 2 is the anti-rotation structure diagram of the present invention;

[0016] Figure 3 is the enlarged view at A of the present invention.

[0017] In the figure: 1. Spring; 2. Front end cover; 3. Drain and ventilation port; 4. Cylinder barrel; 5. Piston; 6. Hydraulic oil; 7. Strong magnet; 8. Transparent tube; 9. Steel ball; 10. Rear end cover; 11. Screw; 12. Pressing plate; 13. Oil drain port; 14. Oil return port; 15. Oil suction port; 16. Sealing ring; 17. Filter plate; 18. First clamping block; 19. Second clamping block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a number of" is two or more, unless otherwise specifically defined.

[0022] Please refer to Figures 1-3 , an embodiment of the present utility model is: a closed - type pressurized hydraulic oil tank, including a cylinder barrel 4, a front end cover 2 is fixedly connected to the left side of the cylinder barrel 4, a rear end cover 10 is fixedly connected to the right side of the cylinder barrel 4, a spring 1 is fixedly connected to the right side of the front end cover 2. The spring 1 functions as a pre - pressure, enabling the hydraulic oil 6 to have a pre - pressure, which has a pressurizing effect on the oil suction port 15 of the hydraulic pump, making it easier for the hydraulic pump to suck oil. One end of the spring 1 away from the front end cover 2 is fixedly connected to a piston 5, a sealing ring 16 is fixedly connected to the bottom of the piston 5, and the sealing ring 16 is slidably connected to the inner wall of the cylinder barrel 4. The number of the sealing rings 16 is two, and the two sealing rings 16 are fixedly connected to the upper and lower ends of the piston 5.

[0023] Working principle: The structure of the spring 1 and the piston 5 is adopted to isolate air while meeting the change in the oil volume inside the hydraulic oil tank. At the same time, due to the pre - pressure of the spring 1, the hydraulic oil 6 has a pre - pressure, which has a pressurizing effect on the oil suction port 15 of the hydraulic pump, making it easier for the hydraulic pump to suck oil. Air can be isolated outside, preventing condensed water from entering the inside of the cylinder barrel 4 and mixing with the hydraulic oil 6.

[0024] Please refer to Figures 1-3 , on the basis of the above - mentioned embodiment, in another embodiment of the present utility model, a strong magnet 7 is fixedly connected to the inner wall of the cylinder barrel 4. The strong magnet 7 is provided to drive the steel ball 9 to move in position. A transparent tube 8 is fixedly connected to the top of the cylinder barrel 4. A steel ball 9 is movably connected inside the transparent tube 8. The steel ball 9 and the strong magnet 7 are in the same vertical position. Hydraulic oil 6 is provided inside the cylinder barrel 4. The hydraulic oil 6 is arranged between the right side of the piston 5 and the left side of the rear end cover 10. A first clamping block 18 is fixedly connected to the inner wall of the top of the cylinder barrel 4. A filter plate 17 is clamped at the bottom of the first clamping block 18. A second clamping block 19 is clamped at the bottom of the filter plate 17, and the second clamping block 19 is clamped to the inner wall bottom of the cylinder barrel 4. The first clamping block 18 and the second clamping block 19 are provided to facilitate the disassembly of the filter plate 17, and the filter plate 17 is provided to filter and isolate impurities.

[0025] Working principle: The cylinder barrel 4 is made of non-magnetic-separating material. A strong magnet 7 is fixed at the piston 5 inside the fuel tank cylinder barrel 4. A transparent tube 8 is designed outside the fuel tank cylinder barrel 4. Oil level markings are engraved on the transparent tube 8, and a steel ball 9 is placed inside the tube. When the volume of the oil inside the fuel tank changes, the position of the piston 5 changes, and the position of the strong magnet 7 also changes accordingly. The external steel ball 9 moves along with it under the suction of the strong magnet 7, and the liquid level inside the fuel tank is displayed on the external transparent tube 8.

[0026] Please refer to Figures 1-3 , on the basis of the above-mentioned embodiment, in another embodiment of the present utility model, a pressing plate 12 is fixedly connected to the left side of the spring 1. Screws 11 are threadedly connected inside the pressing plate 12. The number of the pressing plates 12 and the screws 11 is two, and they are arranged on the left and right sides of the spring 1. The pressing plate 12 presses the spring 1 against the piston 5 and the front end cover 2 through the screws 11, and the piston 5 will not rotate during movement due to the fixing effect of the pressing plate 12.

[0027] Working principle: In order to prevent the misalignment of the strong magnet 7 and the steel ball 9 caused by the rotation of the internal piston 5, pressing plates 12 are added at both ends of the spring 1. The pressing plate 12 presses the spring 1 against the piston 5 and the front end cover 2 through the screws 11, and the piston 5 will not rotate during movement due to the fixing effect of the pressing plate 12.

[0028] The present utility model also provides a liquid level display device for a closed-type pressurized hydraulic fuel tank. A drain and ventilation port 3 is opened on the left side of the cylinder barrel 4, and an oil drain port 13, an oil return port 14, and an oil suction port 15 are opened on the right side of the rear end cover 10.

[0029] The present utility model provides a closed-type pressurized hydraulic fuel tank and a liquid level display device. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present utility model. Each component not clearly defined in this embodiment can be implemented by using the prior art.

Claims

1. A closed type pressurized hydraulic oil tank, comprising a cylinder (4), characterized in that: The left side of the cylinder barrel (4) is fixedly connected to a front end cover (2), the right side of the cylinder barrel (4) is fixedly connected to a rear end cover (10), the right side of the front end cover (2) is fixedly connected to a spring (1), one end of the spring (1) away from the front end cover (2) is fixedly connected to a piston (5), the bottom of the piston (5) is fixedly connected to a sealing ring (16), the sealing ring (16) is slidably connected to the inner wall of the cylinder barrel (4), the number of the sealing rings (16) is two, and the two sealing rings (16) are fixedly connected to the upper and lower ends of the piston (5).

2. A closed type pressurized hydraulic oil tank according to claim 1, characterized in that: The inner wall of the cylinder (4) is fixedly connected to a strong magnet (7), the top of the cylinder (4) is fixedly connected to a transparent tube (8), the interior of the transparent tube (8) is movably connected to a steel ball (9), and the steel ball (9) and the strong magnet (7) are in the same vertical position.

3. A closed type pressurized hydraulic oil tank according to claim 2, characterized in that: Hydraulic oil (6) is arranged inside the cylinder (4), and the hydraulic oil (6) is arranged between the right side of the piston (5) and the left side of the rear end cover (10).

4. A closed type pressurized hydraulic oil tank according to claim 3, characterized in that: A first clamping block (18) is fixedly connected to the top inner wall of the cylinder (4); a filter plate (17) is clamped to the bottom of the first clamping block (18); a second clamping block (19) is clamped to the bottom of the inner wall of the cylinder (4).

5. A closed type pressurized hydraulic oil tank according to claim 4, characterized in that: A pressure plate (12) is fixedly connected to the left side of the spring (1), and a screw (11) is connected to the inner thread of the pressure plate (12). The number of the pressure plate (12) and the screw (11) is two, and they are arranged on the left and right sides of the spring (1).

6. A liquid level display device for a closed type pressurized hydraulic oil tank according to claim 5, characterized in that: The left side of the cylinder barrel (4) is provided with a drainage and ventilation port (3), and the right side of the rear end cover (10) is provided with an oil drain port (13), an oil return port (14), and an oil suction port (15).

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