Portable hydraulic power unit soft tank

Abstract

The utility model relates to hydraulic technology field discloses a portable hydraulic power unit soft oil tank, including oil tank body, oil tank cover and skin bag, and one end of oil tank body is closed, and the other end of oil tank body is open, and the closed end of oil tank body is equipped with oil outlet, the skin bag is located in the oil tank body, and the oil storage cavity is formed between skin bag and oil tank body inner wall, the oil tank cover is located in the open end of oil tank body, and the oil tank cover is sealedly connected with oil tank body, and the oil tank cover is equipped with air hole, and the inner chamber of skin bag is communicated with the outside through air hole, and skin bag is sealedly connected with air hole, and oil tank body or oil tank cover is equipped with oil injection port, in the scheme, all oil liquid is in the completely closed cavity, does not contact with air, this effectively avoids the phenomenon that oil liquid spills in the process of transportation and use, the outer surface of skin bag contacts with oil liquid, and the oil tank is easier to clean and wash clean, guarantees the oil liquid cleanliness, after the air hole is plugged up with the plug, can also be used as the closed type booster oil tank, and the application range is wider.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to a portable hydraulic power unit soft oil tank. Background Technology

[0002] The power unit oil tank is used to store hydraulic oil and is an important component of the hydraulic system. Traditional power unit oil tanks typically have a venting structure on the tank body to ensure smooth oil intake and discharge from the hydraulic system. This usually employs a breather cap or air filter, or sometimes a waterproof vent valve. The vent must be located on the top or upper part of the tank. However, all of these methods have a fatal flaw: when the breather cap or waterproof vent valve is below the oil level, oil overflow will occur. Furthermore, it is difficult to maintain the correct orientation of portable power units during transportation and use, and due to bumps and shaking, oil easily overflows from the tank, affecting the normal operation of the power unit, wasting oil, and causing environmental pollution. Utility Model Content

[0003] The present invention aims to provide a portable hydraulic power unit soft oil tank to solve the problem of oil overflowing from the current power unit oil tank during transportation and use.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a portable hydraulic power unit soft oil tank, comprising an oil tank body, an oil tank cover, and a bladder; one end of the oil tank body is closed, and the other end of the oil tank body is open; the closed end of the oil tank body is provided with an oil outlet; the bladder is located inside the oil tank body, and an oil storage cavity is formed between the bladder and the inner wall of the oil tank body; the oil tank cover is located at the open end of the oil tank body, and the oil tank cover is sealed to the oil tank body; the oil tank cover is provided with a vent, and the inner cavity of the bladder communicates with the outside through the vent; the bladder is sealed to the vent; the oil tank body or the oil tank cover is provided with an oil filling port, and the oil filling port communicates with the oil storage cavity.

[0005] The principle of this solution is as follows: Oil is injected into the oil storage chamber through the oil inlet. After the oil is injected, the oil inlet is sealed. At this time, the bladder is compressed by the oil and its volume decreases. When the power unit draws oil from the oil tank, the bladder expands and its volume increases. Air enters the bladder through the vent and replenishes the air, ensuring that the bladder oil tank does not generate large oil suction resistance. When the power unit discharges oil into the bladder oil tank, the bladder volume decreases and the air in the bladder is discharged through the vent, ensuring that the bladder oil tank does not generate large oil discharge resistance.

[0006] Advantages of this solution: It separates the oil and air, with the oil contained in a completely sealed cavity and not in contact with air. This not only effectively prevents oil spillage during transportation and use, but also allows the oil tank to supply and store oil for the hydraulic system at any time. The bladder automatically expands or contracts as the hydraulic system draws in and discharges oil. The outer surface of the bladder is in contact with the oil, making it easier to clean and ensuring the cleanliness of the oil.

[0007] Preferably, a venting hollow bolt is installed at the vent, and the bladder has a threaded hole at the vent end that mates with the venting hollow bolt. The bladder is fixed to the fuel tank cover by the venting hollow bolt, ensuring the stability of the bladder's connection with the outside environment, while the bladder exchanges air with the outside air through the venting hollow bolt.

[0008] Preferably, the contact surface between the fuel tank cover and the bladder is provided with a sealing groove, which is used to install a sealing ring. This prevents oil in the fuel storage chamber from overflowing from the vent or entering the bladder.

[0009] Preferably, the system also includes an exhaust and replenishment valve, which is installed on the fuel tank cover or the fuel tank body and is connected to the fuel storage chamber. This allows for venting during fuel injection, accelerating the injection process; simultaneously, it enables pressurized fuel injection, preventing outside air from entering the fuel storage chamber during the replenishment process.

[0010] Preferably, the oil outlet is provided with an oil outlet connector, which facilitates connection to the corresponding oil pipeline.

[0011] Preferably, the oil inlet is provided with an oil inlet plug, which seals the oil inlet faster and with better sealing.

[0012] Preferably, the fuel tank body and the fuel tank cover are fixedly connected by bolts, which facilitates quick installation and disassembly.

[0013] Preferably, the thickness of the bladder at the end of the fuel tank cover is greater than the thickness of the rest of the bladder. The bladder at the end of the fuel tank cover will be subjected to the scouring effect of oil during oil filling. Increasing the thickness of the bladder at this point ensures the service life of the bladder. At the same time, it facilitates the setting of corresponding structures to connect with the cover.

[0014] Preferably, the bends of the bladder are all smoothly transitioned to guide the oil flow, and the smooth transition also makes the stress evenly distributed, improving the pressure-bearing capacity of the bladder and extending the service life of the structure. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a side view of an embodiment of the present utility model.

[0017] Figure 3 This is a side view of an embodiment of the present utility model.

[0018] Figure 4 This is an embodiment of the present utility model. Figure 3 A cross-sectional view along the AA direction. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] The reference numerals in the accompanying drawings include: 1. Oil outlet connector; 2. Oil tank body; 3. Leather bladder; 4. Oil tank cover plate; 5. Oil inlet plug; 6. Vent hollow bolt; 7. Exhaust and oil replenishment valve.

[0021] Example:

[0022] A portable hydraulic power unit soft oil tank, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a fuel tank body 2, a fuel tank cover 4, and a bladder 3.

[0023] The oil tank 2 is closed at one end and open at the other. An oil outlet is located at the closed end of the oil tank 2, and can be positioned on any side of the closed end. An oil outlet connector 1 is provided at the oil outlet for easy connection to the corresponding oil pipeline. The oil tank 2 can be made in different shapes or integrated into the valve block. In this embodiment, the oil tank 2 is specifically square, which facilitates fixed installation on the corresponding hydraulic structure and reduces wobbling, thus improving stability.

[0024] The bladder 3 is located inside the fuel tank body 2, forming an oil storage cavity between the bladder 3 and the inner wall of the fuel tank body 2. The bladder 3 is used to contain air. In this embodiment, the bladder 3 is a soft bladder, specifically a rubber bladder. Oil is stored through the space between the soft bladder 3 and the fuel tank body 2, and the oil is completely sealed and does not come into contact with air. The bladder 3 can automatically change with the volume of oil, solving the problem of needing a breather cap for traditional hard-shell fuel tanks. In this solution, the power unit fuel tank can be placed arbitrarily during transportation or use without oil spillage. Finally, the oil in the soft bladder fuel tank is isolated from the air, ensuring that the oil is not affected by moisture and contaminants in the air, which can effectively improve the service life of the oil. The outer surface of the bladder 3 is easy to clean, has a simple structure, is easier to manufacture, and has a lower cost. The fuel tank has a simple structure and is easy to maintain and replace.

[0025] The thickness of the bladder 3 at the end of the fuel tank cover plate 4 is greater than the thickness of the rest of the bladder 3. During fuel filling, the bladder 3 at this end of the fuel tank cover plate 4 will be subject to oil scouring. Increasing the thickness of the bladder 3 at this end ensures its service life and facilitates the connection of the corresponding structure with the cover plate. The bladder 3 at the end of the fuel tank cover plate 4 has a connecting part, which is fixedly connected to the bladder 3. When the connecting part and the bladder 3 are made of the same material, they are integrally formed; when they are made of different materials, they can be connected by adhesive. The threaded hole for connecting the venting hollow bolt 6 is located on the connecting part of the bladder 3.

[0026] The bends of the bladder 3 are all smoothly transitioned, which can guide the flow of oil and distribute stress evenly, thereby improving the pressure-bearing capacity of the bladder 3 and extending the service life of the structure.

[0027] The fuel tank cover 4 is located at the open end of the fuel tank body 2. The fuel tank cover 4 is sealed to the fuel tank body 2. The fuel tank body 2 and the fuel tank cover 4 are fixedly connected by bolts. The bolt connection method facilitates quick installation and disassembly. In this embodiment, the fuel tank body 2 and the fuel tank cover 4 are fixedly connected by four bolts. The four bolts are located at the four opposite corners of the fuel tank body 2. This connection method makes the connection between the fuel tank body 2 and the fuel tank cover 4 more stable.

[0028] In this design, the oil filling port can be located either on the fuel tank cover 4 or on the fuel tank body 2, depending on actual needs. In this embodiment, the fuel tank cover 4 has an oil filling port with a screw plug 5. The screw plug seals the oil filling port, resulting in faster sealing and better overall performance. After the screw plug 5 is installed on the fuel tank cover 4, its inner end is located inside the fuel tank body 2, further enhancing sealing performance and stability.

[0029] The fuel tank cover 4 is equipped with a vent, through which the inner cavity of the bladder 3 communicates with the outside world. The bladder 3 is sealed to the vent. Fuel is injected into the fuel storage chamber through the fuel inlet. After injection, the fuel inlet is sealed, at which point the bladder 3 is compressed by the fuel, reducing its volume. When the power unit draws fuel from the fuel tank, the bladder 3 expands, allowing air to enter through the vent and replenish the air supply, ensuring that the fuel tank does not experience significant fuel intake resistance. When the power unit discharges fuel into the fuel tank, the bladder 3 shrinks, allowing air to escape through the vent, ensuring that the fuel tank does not experience significant fuel discharge resistance.

[0030] In this embodiment, a venting hollow bolt 6 is installed at the vent, and the bladder 3 has a threaded hole at the oil inlet end that mates with the venting hollow bolt 6. The venting hollow bolt 6 fixes the bladder 3 to the oil tank cover plate 4, ensuring the stability of the bladder 3's connection with the outside environment. At the same time, the bladder 3 exchanges air with the outside environment through the venting hollow bolt 6. The vent, oil outlet, and oil tank body 2 are coaxially arranged.

[0031] The fuel tank cover 4 has a sealing groove on the contact surface with the bladder 3. The sealing groove is used to install a sealing ring. This prevents oil in the fuel storage chamber from overflowing from the vent or entering the bladder 3. The diameter of the sealing groove is smaller than the diameter of the connection part of the bladder 3, resulting in better sealing performance between the fuel tank cover 4 and the bladder 3.

[0032] It also includes an exhaust and replenishment valve 7, which can be installed on either the fuel tank cover 4 or the fuel tank body 2, and is connected to the fuel storage chamber. This allows for venting during fuel filling by the exhaust and replenishment valve 7, accelerating the filling process; simultaneously, it allows for pressurized fuel filling, preventing outside air from entering the fuel storage chamber during the filling process. In this embodiment, the vent is located between the fuel filling port and the exhaust and replenishment valve 7.

[0033] The specific implementation process is as follows:

[0034] Oil is injected into the oil reservoir through the oil inlet, and air is discharged from the exhaust and replenishment valve 7. After oil injection, the oil inlet is sealed and the exhaust and replenishment valve 7 is closed. At this time, the bladder 3 is compressed by the oil, reducing its volume and increasing the area of ​​the oil reservoir. When the power unit draws oil from the fuel tank, the bladder 3 expands, and air enters the bladder 3 through the vent to replenish the air and ensure that there is no large oil suction resistance. When the power unit discharges oil into the bladder 3, the bladder 3 shrinks, and the air in the bladder 3 is discharged from the vent, ensuring that there is no large oil discharge resistance in the bladder 3. When oil needs to be replenished in the oil reservoir, oil is injected into the oil reservoir through the exhaust and replenishment valve 7. The bladder 3 is compressed by the oil, reducing its volume, and air is discharged from the vent hollow bolt 6 of the vent.

[0035] This solution addresses the leakage problem during the transportation and use of portable power units, ensuring the cleanliness of the oil in the system is unaffected by the external environment and extending the oil's service life. The bladder 3 automatically expands or contracts with the hydraulic system's oil intake and discharge actions, utilizing its easily deformable nature to ensure smooth oil intake and discharge. The outer surface of the bladder 3 is in contact with the oil, making it easier to clean and sanitize. The oil tank has a simple structure and is easy to maintain and replace. Furthermore, by plugging the vent, this solution can also be used as a closed-loop pressurized oil tank, broadening its application range.

[0036] The above descriptions are merely embodiments of this utility model, and common technical solutions and / or characteristics known in the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A portable hydraulic power unit soft oil tank characterized by, The system includes a fuel tank body, a fuel tank cover, and a bladder. One end of the fuel tank body is closed, and the other end is open. The closed end of the fuel tank body has an oil outlet. The bladder is located inside the fuel tank body, forming an oil storage cavity between the bladder and the inner wall of the fuel tank body. The fuel tank cover is located at the open end of the fuel tank body and is sealed to the fuel tank body. The fuel tank cover has a vent, and the inner cavity of the bladder communicates with the outside through the vent. The bladder is sealed to the vent. An oil filling port is provided on the fuel tank body or the fuel tank cover, and the oil filling port communicates with the oil storage cavity.

2. A soft oil tank for a portable hydraulic power unit according to claim 1, characterized in that: A hollow vent bolt is installed at the vent, and the bladder has a threaded hole at the vent end that mates with the hollow vent bolt.

3. A soft oil tank for a portable hydraulic power unit according to claim 2, wherein: The fuel tank cover plate has a sealing groove on the contact surface with the bladder, and the sealing groove is used to install a sealing ring.

4. A soft oil tank for a portable hydraulic power unit according to claim 1, wherein: It also includes an exhaust oil replenishment valve, which is installed on the oil tank cover or on the oil tank body, and the exhaust oil replenishment valve is connected to the oil storage chamber.

5. A portable hydraulic power unit soft oil tank as defined in claim 1, wherein: An oil outlet connector is provided at the oil outlet.

6. A portable hydraulic power unit soft oil tank according to claim 1, wherein: An oil inlet plug is provided at the oil inlet.

7. A portable hydraulic power unit soft oil tank as claimed in claim 1, wherein: The fuel tank body and fuel tank cover are fixedly connected by bolts.

8. A portable hydraulic power unit soft oil tank according to claim 1, wherein: The thickness of the bladder at the end of the fuel tank cover is greater than the thickness of the rest of the bladder.

9. A portable hydraulic power unit soft oil tank according to claim 1, wherein: All bends in the skin are smoothly rounded.

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