Oil cylinder without water and gas residues

Abstract

The utility model relates to the technical field of oil cylinders, in particular to an oil cylinder free of steam residues. The hydraulic cylinder comprises a main cylinder body and a return stroke cavity, an inner cavity on the periphery of the return stroke cavity is hollow to form a first annular hollow cavity, a vertically-arranged connecting rod is arranged in the middle of the return stroke cavity, a gap is formed between the outer wall face of the connecting rod and the inner wall face of the return stroke cavity, and the gap is communicated with the first annular hollow cavity; an annular recess is formed in the outer wall face of the connecting rod, a groove is formed in the position, corresponding to the annular recess, of the inner wall of the return stroke cavity, a sealing ring is arranged in the groove, the section of the annular recess is in an arc shape, the diameter of the annular recess is larger than that of the sealing ring, and the diameter of the sealing ring is larger than the width of the groove. And a gap is formed between the annular recess and the sealing ring, so that the oil cylinder is in a sealing failure state, and when the oil cylinder works, the oil cylinder is in a sealing effective state. According to the technical scheme, the problem that the oil cylinder is rusted due to the fact that steam cannot be discharged is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to an oil cylinder without residual water vapor. Background Art

[0002] The main function of the cylinder is to convert hydraulic energy into mechanical energy to realize the linear reciprocating motion or swinging motion of mechanical equipment. Cylinders are widely used in various mechanical equipment, such as the lifting, telescopic and tilting mechanisms of lifting machinery, injection molding machinery, metal processing equipment and handling machinery. The working principle of the cylinder is to drive the piston to move in the cylinder body through the pressure provided by the hydraulic system, thereby outputting force and motion.

[0003] In the existing oil cylinder, gas is introduced from top to bottom, and the gas is used to push the piston to move. The gas that is introduced contains a small amount of water vapor. Since the density of water vapor is greater than that of dry gas, the water vapor will flow into the return chamber at the bottom of the oil cylinder. This part of the water vapor cannot be discharged, causing the oil cylinder to rust, resulting in high maintenance costs and greatly reducing the service life of the oil cylinder. Utility Model Content

[0004] In order to solve the problems in the related art, the utility model provides an oil cylinder without residual water vapor, which solves the problem that the oil cylinder is rusted due to the inability to discharge water vapor.

[0005] To solve the above problems, the following technical solutions are provided:

[0006] The utility model provides an oil cylinder without residual water vapor, including a main cylinder body, a return cavity is provided at the lower part of the main cylinder body, the inner cavity of the outer periphery of the return cavity is hollow to form a first annular hollow cavity, the first annular hollow cavity is used for gas flow, a connecting rod arranged vertically is provided in the middle of the return cavity, a gap is provided between the outer wall surface of the connecting rod and the inner wall surface of the return cavity, and the gap is communicated with the first annular hollow cavity; an annular recess is provided on the outer wall surface of the connecting rod, a groove is provided at a position corresponding to the annular recess on the inner wall of the return cavity, a sealing ring is provided in the groove, the cross-section of the annular recess is arc-shaped, and the diameter of the annular recess is larger than the diameter of the sealing ring, and the diameter of the sealing ring is larger than the width of the groove, when the oil cylinder is idle, there is a gap between the annular recess and the sealing ring, so that the oil cylinder is in a sealing failure state, and when the oil cylinder is working, the oil cylinder is in a sealing effective state.

[0007] In the above scheme, gas is introduced from the first annular hollow cavity through the setting of the annular recess. The introduced gas contains a small amount of moisture. When a certain amount of gas is introduced, most of the gas moves upward, and the gas containing moisture sinks, flows through the gap, and then flows out from the gap between the annular recess and the sealing ring, so that the gas containing moisture can be discharged, thereby solving the problem that the gas containing moisture cannot be discharged, effectively preventing the oil cylinder from rusting, greatly extending the service life of the oil cylinder, and ensuring that the oil cylinder can work efficiently and stably.

[0008] When the cylinder is idle, there is a gap between the annular recess and the sealing ring, allowing the gas in the return cavity to flow out. When the cylinder starts working, the connecting rod moves up and down, and the annular groove moves above or below the sealing ring. The diameter of the sealing ring is greater than the width of the groove, so the sealing ring and the outer wall of the connecting rod are offset, making the return cavity and the connecting rod fit in a sealed manner. Through the setting of the annular recess, the gas containing moisture can be discharged without hindering the normal operation of the cylinder.

[0009] A hollow pipe is provided on the outer periphery of the main cylinder body, and a first air inlet is provided at the upper end of the main cylinder body corresponding to the pipe. The pipe forms a gas channel, is connected to the inside of the main cylinder body, and is connected to the first annular hollow cavity.

[0010] In the above solution, by setting the first air inlet, gas is introduced from the first air inlet, first flows through the pipeline, and then enters the interior of the main cylinder body to drive the piston to move vertically upward.

[0011] A chamber connected to the atmosphere is provided below the gap, and the gap is connected to the chamber.

[0012] In the above solution, the chamber is provided to discharge the gas containing moisture to the outside of the oil cylinder.

[0013] The connecting rod is hollow, a piston rod is provided in the connecting rod, the piston rod and the connecting rod are slidably matched, a piston is sleeved on the piston rod, and the piston is slidably and sealedly matched with the inner wall of the main cylinder body.

[0014] The upper end portion of the main cylinder is provided with a second air inlet.

[0015] In the above solution, by providing the second air inlet, gas is introduced from the second air inlet to drive the piston to move vertically downward, so that the gas in the main cylinder is discharged from the gap between the annular recess and the sealing ring.

[0016] The above solution has the following advantages:

[0017] The cam is provided with an annular groove which is provided on the outer wall of the oil cylinder to prevent the oil from leaking out, so that the oil cylinder can be kept in a state of low pressure and low pressure.

[0018] 2. The diameter of the annular depression is larger than the diameter of the sealing ring. When the cylinder is idle, there is a gap between the annular depression and the sealing ring, so that the gas in the return cavity can flow out. When the cylinder starts working, the connecting rod moves up and down, and the annular groove moves above or below the sealing ring. The diameter of the sealing ring is larger than the width of the groove, so the sealing ring and the outer wall of the connecting rod are offset, so that the return cavity and the connecting rod are sealed. Through the setting of the annular depression, the gas containing moisture can be discharged without hindering the normal operation of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the present invention is further described in detail below based on specific embodiments of the utility model in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 It is a structural schematic diagram of an oil cylinder without residual water vapor;

[0021] Figure 2 It is a cross-sectional view of an oil cylinder without residual moisture;

[0022] Figure 3 This is a schematic diagram of an enlarged portion A of an oil cylinder without residual moisture;

[0023] Figure 4 This is a schematic diagram of an enlarged portion B of a fuel cylinder without residual moisture;

[0024] Figure 5 A top view of an oil cylinder without residual moisture;

[0025] Explanation of the accompanying drawings: 1. Main cylinder body; 11. First air inlet; 12. Piston rod; 13. Piston; 14. Second air inlet; 2. Return cavity; 21. First annular hollow cavity; 22. Connecting rod; 23. Annular depression; 24. Groove; 25. Sealing ring; 3. Pipeline. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In a specific embodiment 1, Figure 1 、 2 As shown, the utility model is an oil cylinder without water vapor residue, which includes a main cylinder body 1, a hollow pipe 3 is provided on the periphery of the main cylinder body 1, a first air inlet 11 is provided on the upper end of the main cylinder body 1 corresponding to the pipe 3, and the pipe 3 forms a gas channel, and the pipe 3 is connected with the interior of the main cylinder body 1; a return cavity 2 is provided at the lower part of the main cylinder body 1, and the inner cavity of the outer periphery of the return cavity 2 is hollow to form a first annular hollow cavity 21, and the pipe 3 is connected with the first annular hollow cavity 21 for gas flow, and a connecting rod 22 arranged vertically is provided in the middle of the return cavity 2, and the connecting rod 22 is hollow, and a piston rod 12 is provided in the connecting rod 22, and the piston rod 12 and the connecting rod 22 are slidably matched, and a piston 13 is sleeved on the piston rod 12, and the piston 1 3 is fitted with the inner wall of the main cylinder body 1 in a sliding and sealing manner; a gap is provided between the outer wall of the connecting rod 22 and the inner wall of the return chamber 2, and the gap is connected to the first annular hollow cavity 21. A chamber connected to the atmosphere is provided below the gap, and the gap is connected to the chamber. Gas enters from the first air inlet 11. Since the pipeline 3 is connected to the inside of the main cylinder body 1, a part of the gas first flows through the pipeline 3 and enters the inside of the main cylinder body 1 to drive the piston 13 to move vertically upward, and the other part of the gas enters the first annular hollow cavity 21. Since the gas contains a small amount of moisture, the density of the gas containing moisture is greater than that of the dry gas, so that the gas entering the first annular hollow cavity 21 is gas containing moisture, which flows through the gap and is discharged from the chamber to the outside of the oil cylinder.

[0028] like Figure 3As shown, an annular recess 23 is provided on the outer wall of the connecting rod 22, and a groove 24 is provided on the inner wall of the return cavity 2 at a position corresponding to the annular recess 23, and a sealing ring 25 is provided in the groove 24. The cross-section of the annular recess 23 is arc-shaped. When the cylinder is idle, the diameter of the annular recess 23 is larger than the diameter of the sealing ring 25, so that there is a gap between the annular recess 23 and the sealing ring 25, and the cylinder is in a sealing failure state, and the gas containing moisture in the first annular hollow cavity 21 can be discharged; when the cylinder is working, the connecting rod 22 moves up and down, and the annular groove 24 moves to above or below the sealing ring 25. Since the diameter of the sealing ring 25 is larger than the width of the groove 24, the sealing ring 25 is against the outer wall of the connecting rod 22, so that the return cavity 2 and the connecting rod 22 are sealed. The cylinder is in an effective sealing state, and normal operation can be achieved.

[0029] In a specific embodiment 2, Figure 4 、 5 As shown, the difference between this embodiment and embodiment 1 is that a second air inlet 14 is also disclosed in this embodiment. The second air inlet 14 is located at the upper end of the main cylinder body 1, and the second air inlet 14 is communicated with the interior of the main cylinder body 1. Gas is introduced from the second air inlet 14, thereby driving the piston 13 to move vertically downward, which can squeeze the gas in the main cylinder body 1 to flow from the first annular hollow cavity 21 to the gap, and finally flow out from the gap.

[0030] First, gas is introduced from the first air inlet 11, and the gas flows through the pipeline 3. Most of the gas flows into the main cylinder body 1, driving the piston 13 to move. The gas containing water sinks to the first annular hollow cavity 21 and flows into the gap. When work starts, when the connecting rod 22 does not move, there is a gap between the annular recess 23 and the sealing ring 25. The gas containing water flows from the gap to the chamber and then is discharged into the atmosphere. That is, every time the oil cylinder starts to work, a small amount of gas containing water can be discharged, which greatly avoids excessive atomization of water vapor into droplets, effectively prevents the oil cylinder from rusting, greatly extends the service life of the oil cylinder, and ensures that the oil cylinder can work efficiently and stably.

[0031] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0032] Obviously, the above embodiments are merely examples for clear explanation and are not limitations on the implementation methods. For ordinary technicians in the field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A fuel cylinder without residual water vapor, characterized in that: The invention comprises a main cylinder body (1), a return cavity (2) is provided at the lower part of the main cylinder body (1), the inner cavity of the outer periphery of the return cavity (2) is hollow to form a first annular hollow cavity (21), the first annular hollow cavity (21) is used for gas flow, a connecting rod (22) arranged in a vertical manner is provided in the middle part of the return cavity (2), a gap is provided between the outer wall surface of the connecting rod (22) and the inner wall surface of the return cavity (2), and the gap is connected to the first annular hollow cavity (21); the outer wall surface of the connecting rod (22) is provided with an annular recess (23) A groove (24) is provided on the inner wall of the return cavity (2) at a position corresponding to the annular recess (23), and a sealing ring (25) is provided in the groove (24). The cross section of the annular recess (23) is in the shape of an arc, and the diameter of the annular recess (23) is larger than the diameter of the sealing ring (25), and the diameter of the sealing ring (25) is larger than the width of the groove (24). When the oil cylinder is idle, there is a gap between the annular recess (23) and the sealing ring (25), so that the oil cylinder is in a sealing failure state. When the oil cylinder is working, the oil cylinder is in a sealing effective state.

2. The oil cylinder without residual moisture according to claim 1, characterized in that: A hollow pipe (3) is provided on the outer periphery of the main cylinder (1); a first air inlet (11) is provided at the upper end of the main cylinder (1) corresponding to the pipe (3); the pipe (3) forms a gas channel; and the pipe (3) is connected to the interior of the main cylinder (1).

3. The oil cylinder without residual moisture according to claim 2, characterized in that: The pipe (3) is communicated with the first annular hollow cavity (21).

4. The oil cylinder without residual moisture according to claim 1, characterized in that: A chamber connected to the atmosphere is provided below the gap, and the gap is connected to the chamber.

5. The oil cylinder without residual moisture according to claim 1, characterized in that: The connecting rod (22) is hollow, a piston rod (12) is provided in the connecting rod (22), the piston rod (12) and the connecting rod (22) are slidably matched, a piston (13) is sleeved on the piston rod (12), and the piston (13) and the inner wall surface of the main cylinder (1) are slidably sealed.

6. The oil cylinder without residual moisture according to claim 1, characterized in that: The upper end of the main cylinder (1) is provided with a second air inlet (14), and the second air inlet (14) is communicated with the main cylinder.

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