Leakage-proof recovery device for hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to an anti-leakage recovery device of a hydraulic oil cylinder. Comprising a cylinder barrel, a piston is slidably and hermetically connected into an inner cavity of the cylinder barrel, a piston rod is fixed to one end of the piston and penetrates through a sealing block, a first oil port and a second oil port are fixedly and hermetically connected to the two ends of the cylinder barrel respectively, an anti-leakage barrel is fixedly and hermetically connected to the sealing block, and the piston rod penetrates through the anti-leakage barrel and is slidably and hermetically connected with the anti-leakage barrel; an inlet of the flow control throttle valve is fixedly communicated with the anti-leakage cylinder, an outlet end of the flow control throttle valve is communicated with a first end of the oil return pipe, and a second end of the oil return pipe is communicated with the first oil port through the one-way valve. After the sealing ring between the piston rod and the sealing block is damaged and hydraulic oil enters the inner cavity of the cylinder barrel through the second oil port, the hydraulic oil leaking from the position between the sealing block and the piston rod can enter the anti-leakage barrel, and the anti-leakage barrel can collect the leaked hydraulic oil.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder anti-leakage recovery device. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device and has no transmission backlash, resulting in smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a buffer device, and a venting device. As an actuator in a hydraulic transmission system, it is an energy conversion device that converts hydraulic energy into mechanical energy. Hydraulic cylinders are classified into three main types: piston cylinders, plunger cylinders, and oscillating cylinders. Piston cylinders and plunger cylinders achieve reciprocating linear motion, outputting speed and thrust, while oscillating cylinders achieve reciprocating oscillation, outputting angular velocity (speed) and torque. However, the sealing device often does not provide a good seal for hydraulic oil, leading to hydraulic oil leakage after prolonged use. Therefore, there are technical problems with cylinder sealing and handling of leaking oil, and the leaked hydraulic oil can contaminate the equipment.

[0003] Patent document CN213116911U discloses a leak-proof hydraulic cylinder, including a cylinder barrel. A left oil valve is located on the left side of the upper surface of the cylinder barrel. A piston is slidably mounted inside the cylinder barrel. A cylinder head is threadedly connected to the right side of the cylinder barrel. A piston rod, penetrating the cylinder head, is located at the middle of the right surface of the piston. A right oil valve is located on the right side of the upper surface of the cylinder barrel. A leakage oil chamber is located inside the cylinder head. An oil drain plug, penetrating the right side wall of the cylinder head, is slidably mounted inside the leakage oil chamber. The oil drain plug has a through-hole structure, and a sealing ring is connected to its inner side wall. The cylinder head has a shock-absorbing ring along its right side wall, and a dripping ring on the right outer surface of the drain plug. The leakage oil chamber communicates with the dripping ring. An oil collection groove penetrating the lower side wall of the dripping ring is located inside the dripping ring. An oil collection bottle is located at the lower end of the dripping ring and on the lower surface of the cylinder barrel. A mounting seat is located at the right end of the piston rod, and a drain plug push ring is located at the left end of the mounting seat and on the piston rod. The outer diameter of the drain plug push ring is smaller than the inner diameter of the sealing ring. An opening is provided through the rear side wall of the cylinder head, and a one-way valve is located within the opening. A waste oil bottle connected to the one-way valve is located on the rear side wall of the cylinder barrel. This leak-proof hydraulic cylinder adopts the basic style of a traditional hydraulic cylinder, but improves the cylinder head by adding a leakage oil chamber and a drain plug design, allowing leaked hydraulic oil to be effectively collected in the waste oil bottle. A dripping ring is located outside the drain plug, allowing for the collection of any re-leaking hydraulic oil. However, this leak-proof hydraulic cylinder cannot effectively reuse the recovered hydraulic oil. Utility Model Content

[0004] The main objective of this invention is to provide a hydraulic cylinder anti-leakage recovery device that can collect and reuse leaked hydraulic oil.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A hydraulic cylinder anti-leakage recovery device includes a cylinder barrel, a sealing block fixedly and sealed to one end of the cylinder barrel, a piston slidably and sealed to the inner cavity of the cylinder barrel, a piston rod fixedly attached to one end of the piston, the piston rod passing through the sealing block, the piston rod and the sealing block being slidably and sealed to each other, a first oil port and a second oil port fixedly and sealed to both ends of the cylinder barrel, an anti-leakage cylinder fixedly and sealed to the sealing block, the piston rod passing through the anti-leakage cylinder, the piston rod and the anti-leakage cylinder being slidably and sealed to each other, the inlet of a flow control throttle valve being fixedly connected to the anti-leakage cylinder, the outlet end of the flow control throttle valve being connected to the first end of a return oil pipe, and the second end of the return oil pipe being connected to the first oil port through a check valve.

[0007] Specifically, the leak-proof cylinder and the sealing block are fixedly connected by multiple fastening bolts, and a sealing ring is installed between the sealing block and the leak-proof cylinder.

[0008] Specifically, a sealing ring is provided between the sealing block and the piston rod.

[0009] Specifically, a sealing ring is provided between the anti-leakage cylinder and the piston rod.

[0010] Specifically, a pressure sensor is fixed on the leak-proof cylinder, the pressure interface of the pressure sensor is connected to the inside of the leak-proof cylinder, and the pressure sensor is electrically connected to the alarm through the controller.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. After the sealing ring between the piston rod and the sealing block is damaged, the hydraulic oil enters the inner cavity of the cylinder through the second oil port. The hydraulic oil that leaks from between the sealing block and the piston rod will enter the anti-leakage cylinder, which can collect the leaked hydraulic oil.

[0013] 2. As the hydraulic oil in the anti-leakage cylinder continues to increase, the pressure in the anti-leakage cylinder rises. The pressure sensor can transmit the signal to the controller, which can then activate the alarm to alert the staff that there is a hydraulic oil leak in the hydraulic cylinder.

[0014] 3. As the hydraulic oil in the anti-leakage cylinder continues to increase, when the hydraulic oil enters the inner cavity of the cylinder from the second oil port, the hydraulic oil in the anti-leakage cylinder can be discharged through the flow control throttle valve, return oil pipe, check valve and first oil port, thereby realizing the reuse of the leaked hydraulic oil. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the extension rod of this hydraulic cylinder when it is extended.

[0016] Figure 2 This is a schematic diagram of the retraction rod of this hydraulic cylinder.

[0017] The components in the attached diagram are named as follows: 1. Cylinder, 2. Piston, 3. Piston rod, 4. Sealing block, 5. Leak-proof cylinder, 6. Fastening bolt, 7. Pressure sensor, 8. Flow control throttle valve, 9. Oil return pipe, 10. Check valve, 11. Inner cavity, 12. First oil port, 13. Second oil port. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example 1: Refer to Figure 1 and Figure 2As shown, a hydraulic cylinder anti-leakage recovery device includes a cylinder barrel 1, with a sealing block 4 fixedly and sealed to one end of the cylinder barrel 1. Specifically, the anti-leakage cylinder 5 and the sealing block 4 are fixedly connected by multiple fastening bolts 6, and a sealing ring is installed between the sealing block 4 and the anti-leakage cylinder 5. A piston 2 is slidably and sealedly connected to the inner cavity 11 of the cylinder barrel 1, and a piston rod 3 is fixed to one end of the piston 2. The piston rod 3 passes through the sealing block 4, and the piston rod 3 and the sealing block 4 are slidably and sealedly connected. Specifically, a sealing ring is provided between the sealing block 4 and the piston rod 3.

[0020] The cylinder 1 has a first oil port 12 and a second oil port 13 fixedly and sealed at both ends.

[0021] A leak-proof cylinder 5 is fixedly and sealed on the sealing block 4. The piston rod 3 passes through the leak-proof cylinder 5 and is slidably and sealed to the leak-proof cylinder 5. The inlet of the flow control throttle valve 8 is fixedly connected to the leak-proof cylinder 5. The outlet end of the flow control throttle valve 8 is connected to the first end of the return oil pipe 9. The second end of the return oil pipe 9 is connected to the first oil port 12 through the one-way valve 10.

[0022] like Figure 1 As shown, when hydraulic oil flows in from the first oil port 12, the check valve 10 is in the closed state. The hydraulic oil cannot enter the anti-leakage cylinder 5 through the check valve 10, the return oil pipe 9 and the flow control throttle valve 8. The hydraulic oil can only enter the inner cavity 11 on the left side of the piston 2. The hydraulic oil entering the inner cavity 11 on the left side of the piston 2 pushes the piston 2 and the piston rod 3 to move. The hydraulic oil in the inner cavity 11 on the right side of the piston 2 flows out through the second oil port 13, thereby completing the extension of the piston rod 3.

[0023] like Figure 2 As shown, after the hydraulic oil flows from the second oil port 13 into the inner cavity 11 on the right side of the piston 2, it pushes the piston 2 and the piston rod 3 to move to the left, thereby realizing the retraction of the piston rod 3.

[0024] When the sealing ring between the piston rod 3 and the sealing block 4 is damaged, causing hydraulic oil leakage, the leaked hydraulic oil will enter the anti-leakage cylinder 5, causing the pressure inside the anti-leakage cylinder 5 to rise. The hydraulic oil inside the anti-leakage cylinder 5 will be discharged through the flow control throttle valve 8, the return oil pipe 9 and the one-way valve 10. The hydraulic oil discharged from the one-way valve 10 and the hydraulic oil discharged from the first oil port 12 will flow back to the oil tank together, thereby achieving the purpose of recovering and reusing the leaked oil.

[0025] Example 2: Based on Example 1, referring to... Figure 1 and Figure 2 As shown, a pressure sensor 7 is fixed on the anti-leakage cylinder 5. The pressure interface of the pressure sensor 7 is connected to the inside of the anti-leakage cylinder 5. The pressure sensor 7 is electrically connected to the alarm through the controller.

[0026] After the sealing ring between the sealing block 4 and the piston rod 3 is damaged, causing hydraulic oil to leak into the anti-leakage cylinder 5, the pressure inside the anti-leakage cylinder 5 increases. After the pressure sensor 7 detects the increase in pressure inside the anti-leakage cylinder 5, it will send a signal to the controller. After receiving the signal from the pressure sensor 7, the controller will activate the alarm, which will alert the staff so that they can replace the sealing ring between the sealing block 4 and the piston rod 3 in a timely manner.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder anti-leakage recovery device, comprising a cylinder (1), a sealing block (4) fixedly and sealed to one end of the cylinder (1), a piston (2) slidably and sealed to the inner cavity (11) of the cylinder (1), a piston rod (3) fixed to one end of the piston (2), the piston rod (3) passing through the sealing block (4), the piston rod (3) and the sealing block (4) being slidably and sealed to each other, and a first oil port (12) and a second oil port (13) fixedly and sealed to both ends of the cylinder (1), characterized in that, A leak-proof cylinder (5) is fixedly and sealed on the sealing block (4). The piston rod (3) passes through the leak-proof cylinder (5). The piston rod (3) and the leak-proof cylinder (5) are slidably and sealed together. The inlet of the flow control throttle valve (8) is fixedly connected to the leak-proof cylinder (5). The outlet end of the flow control throttle valve (8) is connected to the first end of the return oil pipe (9). The second end of the return oil pipe (9) is connected to the first oil port (12) through the check valve (10).

2. The hydraulic cylinder anti-leakage recovery device according to claim 1, characterized in that, The leak-proof cylinder (5) and the sealing block (4) are fixedly connected by multiple fastening bolts (6), and a sealing ring is installed between the sealing block (4) and the leak-proof cylinder (5).

3. The hydraulic cylinder anti-leakage recovery device according to claim 1, characterized in that, A sealing ring is provided between the sealing block (4) and the piston rod (3).

4. The hydraulic cylinder anti-leakage recovery device according to claim 1, characterized in that, A sealing ring is provided between the anti-leakage cylinder (5) and the piston rod (3).

5. The hydraulic cylinder anti-leakage recovery device according to claim 1, characterized in that, A pressure sensor (7) is fixed on the anti-leakage cylinder (5). The pressure interface of the pressure sensor (7) is connected to the inside of the anti-leakage cylinder (5). The pressure sensor (7) is electrically connected to the alarm through the controller.

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