Novel automatic oil supplementing device of hydraulic oil cylinder

Abstract

The utility model discloses a novel automatic oil recharging device of a hydraulic oil cylinder, which comprises an oil recharging tank cylinder body, the oil recharging tank cylinder body is fixedly arranged on a main oil cylinder through a hoop, the left side and the right side of the oil recharging tank cylinder body are respectively provided with an upper cover and a lower cover, and a piston is arranged in the oil recharging tank cylinder body. An oil port on the lower cover is respectively connected to an upper cavity oil port of the main oil cylinder and a main oil tank loop through a pipeline and a three-way piece; and an overflow valve and an elbow piece are also arranged between the oil port on the lower cover and the three-way piece. The device can automatically supplement oil or suck oil to the upper cavity of the hydraulic oil cylinder staying at any position for a long time, the device can be ensured to be filled with oil firstly when the upper cavity of the main hydraulic oil cylinder is filled with oil every time, and the device has the functions of bearing pressure, automatically inflating and deflating, preventing dust and dehumidifying.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinder matching devices, in particular to a novel automatic oil replenishing device for a hydraulic oil cylinder. Background Art

[0002] When the hydraulic cylinder is in a stopped state at any position for a long time, the hydraulic cylinder may slide down due to system leakage or the hydraulic oil in the hydraulic cylinder shrinking as the temperature drops. When the sliding amount does not reach the sliding amount for the hydraulic system to automatically reset, the hydraulic system will not immediately add oil to the upper chamber of the hydraulic cylinder. Therefore, before the hydraulic system automatically resets, if the upper chamber of the hydraulic cylinder is not replenished with oil in time, a vacuum will be formed in the upper chamber. Therefore, during this period, oil can be replenished in time to the upper chamber. Since the vacuum will cause the gas in the hydraulic oil to overflow and produce cavitation (bubbles), the oil The holes in the circuit are very destructive to the hydraulic circuit and components, and will cause vibration, noise and pitting of the hydraulic cylinder. Therefore, it is necessary to eliminate the influence of vacuum. In areas with large temperature difference between day and night at high altitudes, the hydraulic oil in the hydraulic cylinder will expand as the temperature rises, which will cause the hydraulic cylinder to rise. At this time, the upper chamber of the hydraulic cylinder needs to return oil to the replenishing tank in time. If the oil cannot be returned in time, the pressure in the upper chamber will increase. If no intervention is made in time, the continuously increasing pressure in the upper chamber will risk bending the piston rod. Therefore, it is necessary to eliminate the increase in pressure in the upper chamber.

[0003] At present, conventional oil replenishment tanks can only replenish oil to the upper chamber of the hydraulic cylinder. A filling valve is installed between the upper chamber of the hydraulic cylinder and the conventional oil replenishment tank. The filling valve is one-way. When a vacuum appears in the upper chamber of the hydraulic cylinder, oil can be replenished to the rodless chamber, but when the upper chamber of the hydraulic cylinder needs to return oil, oil cannot be returned to the replenishment tank. Due to the limitations of the structural design of conventional oil replenishment tanks, the channel between the upper chamber of the hydraulic cylinder and the replenishment tank cannot be made bidirectional. If a bidirectional channel is made, the conventional oil replenishment tank will have the risk of hydraulic oil overflow, which is definitely not advisable. Moreover, conventional oil replenishment tanks need to be designed with accessories such as hydraulic controllers and hydraulic sensors, which are not only expensive, but also have the risk of failure of hydraulic components after long-term use. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, a new oil replenishing device is provided which can automatically adjust the oil inlet and outlet amounts to the upper chamber (rodless chamber) of the hydraulic cylinder according to system leakage or temperature changes.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a new type of automatic oil replenishing device for a hydraulic cylinder, including an oil replenishing tank cylinder body, the oil replenishing tank cylinder body is fixedly installed on the main oil cylinder through a clamp, an upper cover and a lower cover are respectively arranged on the left and right sides of the oil replenishing tank cylinder body, a piston is arranged in the oil replenishing tank cylinder body, the oil port on the lower cover is respectively connected to the upper chamber oil port of the main oil cylinder and the main oil tank circuit through a pipeline and a tee piece; an overflow valve and an elbow piece are also arranged between the oil port on the lower cover and the tee piece.

[0006] The piston divides the new oil replenishing tank into two chambers, one chamber is filled with hydraulic oil, and the other chamber is connected to the atmosphere. When the upper chamber of the main hydraulic cylinder is filled with oil, the hydraulic oil first fills the new oil replenishing device. As the hydraulic oil is filled, the piston in the new oil replenishing device slowly moves toward the upper cover end until the piston completely reaches the upper cover. At this time, the new oil replenishing device is already full of hydraulic oil, and the remaining hydraulic oil returns to the main tank through the main tank circuit.

[0007] Furthermore, a compression type sealing ring is provided between the piston and the inner wall of the oil replenishment tank cylinder of the utility model;

[0008] It can play a good sealing role, ensuring that when the new oil replenishing device is full of oil, there will be no hydraulic oil overflow due to leakage. The compression seal ring consists of a special-shaped ring, two retaining rings and two angular guide support rings. The angular guide support ring plays the role of supporting the piston and will not be squeezed into the radial sealing gap. It is suitable for working conditions with rapid pressure changes and the structure can prevent distortion.

[0009] Furthermore, the upper cover of the oil replenishment tank cylinder body of the utility model is connected to an air filter via an air filter flange;

[0010] The air entering the device can be dehumidified and filtered, which can effectively improve the working performance and reliability of the hydraulic system, thereby extending the service life of the entire equipment.

[0011] Furthermore, an exhaust pressure measuring joint is also provided on the lower cover of the oil replenishment tank cylinder body of the utility model, so as to ensure that the air in the cavity filled with hydraulic oil in the new oil replenishment tank can be exhausted.

[0012] Furthermore, the oil filling tank cylinder body of the utility model is also provided with lifting screws, which are convenient for later construction lifting and ensure safe lifting at the construction site.

[0013] Furthermore, the installation angle and direction of the oil replenishment tank cylinder body described in the utility model are consistent with those of the main oil cylinder.

[0014] The beneficial effects of the utility model are as follows: the oil replenishing device of the utility model has the following advantages:

[0015] 1. It can automatically replenish or absorb oil from the upper chamber of the hydraulic cylinder that stays at any position for a long time. Every time when the upper chamber of the main hydraulic cylinder is filled with oil, it can ensure that the device is filled with oil first, without the need to set up a separate pump-opening oil replenishment circuit like a conventional oil replenishment tank; 2. The upper and lower covers play a good positioning role, so there is no need to design hydraulic controllers, liquid level sensors and other components, reducing the risk of failure of electronic components; 3. An overflow valve is set in the oil circuit of the upper chamber of the hydraulic cylinder, so the new oil replenishment device can withstand pressure, while conventional oil replenishment tanks do not have this pressure-bearing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the oil filling tank cylinder body in the utility model;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 yes Figure 2 Enlarged view of point B in .

[0021] Numbers in the figure: 1. Oil tank cylinder body, 2. Main oil cylinder, 3. Upper cover, 4. Lower cover, 5. Piston, 6. Tee, 7. Upper chamber oil port, 8. Main oil tank circuit, 9. Overflow valve, 10. Elbow, 11. Compression sealing ring, 12. Air filter flange, 13. Air filter, 14. Exhaust pressure measuring joint, 15. Hoop. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 to Figure 4A new automatic oil replenishing device for a hydraulic cylinder is shown, comprising an oil replenishing tank cylinder body 1, which is fixedly mounted on the main oil cylinder 2 through a clamp 15, an upper cover 3 and a lower cover 4 are respectively arranged on the left and right sides of the oil replenishing tank cylinder body 1, a piston 5 is arranged inside the oil replenishing tank cylinder body 1, and the oil port on the lower cover 4 is respectively connected to the upper chamber oil port 7 of the main oil cylinder 2 and the main oil tank circuit 8 through a pipeline and a tee 6; an overflow valve 9 and an elbow 10 are also arranged between the oil port on the lower cover 4 and the tee 6. The piston divides the new oil replenishing tank into two chambers, one of which is filled with hydraulic oil and the other is connected to the atmosphere.

[0024] Among them, a compression type sealing ring 11 is arranged between the piston 5 and the inner wall of the oil filling tank cylinder body 1; the upper cover 3 of the oil filling tank cylinder body 1 is connected to an air filter 13 through an air filter flange 12;

[0025] An exhaust pressure measuring joint 14 is also provided on the lower cover 4 of the oil replenishing tank cylinder body 1 to ensure that the air in the cavity filled with hydraulic oil in the new oil replenishing tank can be exhausted.

[0026] The oil filling tank cylinder body 1 is also provided with lifting screws to facilitate the later construction lifting and ensure safe lifting at the construction site. The installation angle and direction of the oil filling tank cylinder body 1 are consistent with those of the main oil cylinder 2.

[0027] Working principle:

[0028] When the upper chamber of the main hydraulic cylinder is filled with oil, the hydraulic oil first fills the new oil replenishing device. As the hydraulic oil is filled, the piston in the new oil replenishing device slowly moves toward the upper cover end until the piston completely reaches the upper cover. At this time, the new oil replenishing device is already full of hydraulic oil, and the remaining hydraulic oil returns to the main oil tank through the main oil tank circuit;

[0029] The new oil replenishing device is convenient for oil replenishment. Every time when the upper chamber of the main hydraulic cylinder is filled with oil, it can be guaranteed that the device is filled with oil first, without the need to set up a separate pump replenishing circuit like a conventional oil replenishing tank; the volume value of the new oil replenishing device is considered to be able to fill the new oil replenishing tank every time the hydraulic system is automatically reset;

[0030] In addition, the oil replenishing amount required by the oil replenishing device of the utility model only needs to meet the small amount of oil replenishing before the hydraulic system automatically resets, and the oil replenishing speed is not required, so it can be designed as a structure of a small energy storage device.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of automatic oil replenishing device for a hydraulic cylinder, characterized in that: The invention comprises an oil replenishing tank cylinder body (1), wherein the oil replenishing tank cylinder body (1) is fixedly mounted on a main oil cylinder (2) via a clamp (15), an upper cover (3) and a lower cover (4) are respectively arranged on the left and right sides of the oil replenishing tank cylinder body (1), a piston (5) is arranged inside the oil replenishing tank cylinder body (1), an oil port on the lower cover (4) is respectively connected to an upper chamber oil port (7) of the main oil cylinder (2) and a main oil tank circuit (8) via a pipeline and a tee piece (6); an overflow valve (9) and an elbow piece (10) are also arranged between the oil port on the lower cover (4) and the tee piece (6).

2. The novel automatic oil replenishing device for a hydraulic cylinder according to claim 1 is characterized in that: A compression type sealing ring (11) is arranged between the piston (5) and the inner wall of the oil replenishment tank cylinder (1).

3. The novel automatic oil replenishing device for a hydraulic cylinder according to claim 1 is characterized in that: The upper cover (3) of the oil replenishment tank cylinder body (1) is connected to an air filter (13) via an air filter flange (12).

4. The novel automatic oil replenishing device for a hydraulic cylinder according to claim 1 is characterized in that: An exhaust pressure measuring joint (14) is also provided on the lower cover (4) of the oil replenishment tank cylinder body (1).

5. The novel automatic oil replenishing device for a hydraulic cylinder according to claim 1 is characterized in that: The oil replenishing tank cylinder body (1) is also provided with hanging screws.

6. The novel automatic oil replenishing device for a hydraulic cylinder according to claim 1 is characterized in that: The installation angle and direction of the oil replenishment tank cylinder body (1) and the main oil cylinder (2) are consistent.

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