Single-acting air cylinder structure with oil lubrication

Abstract

The utility model discloses a single-action air cylinder structure with oil lubrication, which comprises a separator and a compressor, an outlet end of the separator is connected with an air cylinder of the compressor through a process gas pipeline, a piston component is arranged in the air cylinder, a liquid discharge pipeline is connected to a non-action side of the air cylinder, and the liquid discharge pipeline is communicated with the process gas pipeline. One end of the liquid drainage pipeline is connected with the inlet end of the separator, a one-way valve and a stop valve are sequentially arranged on the liquid drainage pipeline, the reciprocating compressor relates to the technical field of reciprocating compressors, and the liquid drainage pipeline is arranged on the non-acting side of the air cylinder and connected with the inlet end of the separator, so that the problem of liquid accumulation on the non-acting side is effectively solved. The accumulated liquid is discharged into the separator through the liquid discharging pipeline, the one-way valve and the normally-open stop valve, the liquid impact phenomenon caused by the accumulated liquid in the running process of the compressor is avoided, and the running safety and reliability of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating compressors, in particular to an oil-lubricated single-acting cylinder structure. Background Technique

[0002] With the increase of global energy consumption and the development of energy science and technology, the requirements for reciprocating compressors are getting higher and higher. When using a reciprocating compressor, ensuring safety is of crucial importance. Reducing the use risk from the design stage to ensure the safety of personnel and equipment is one of the most important goals of the compressor industry. In the case of oil lubrication in the single-acting cylinder of traditional reciprocating compressors, since there is no air flow passing through the non-acting side, lubricating oil accumulates for a long time. Excessive accumulation of lubricating oil may cause "liquid hammer" in the non-acting side cylinder.

[0003] Generally, it is necessary to regularly close the inlet valve of the unloader on the non-acting side cylinder to let the air flow carry away the accumulated liquid. In this way, the single-acting cylinder becomes a double-acting cylinder, and the power of the compressor may increase or overload in a short time. At the same time, the pressure and flow rate downstream of the process gas pipeline will fluctuate.

[0004] For forged cylinders, a balance chamber is generally set on the non-acting side. The balance chamber is located at the high point of the pipeline. If liquid accumulates, there is enough space to store the liquid. Setting up a balance chamber generally requires re-setting a pipeline with a relatively large diameter, and the pipeline layout is relatively complex.

[0005] Therefore, in order to solve the above problems, the present application proposes an oil-lubricated single-acting cylinder structure. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides an oil-lubricated single-acting cylinder structure, which solves the hidden danger of "liquid hammer" on the non-acting side of the single-acting cylinder in the case of oil lubrication of the reciprocating compressor.

[0007] To achieve the above object, the utility model is realized through the following technical solutions: an oil-lubricated single-acting cylinder structure, including a separator and a compressor. The outlet end of the separator is connected to the cylinder of the compressor through a process gas pipeline. A piston component is arranged in the cylinder. A drain pipeline is connected to the non-acting side of the cylinder. One end of the drain pipeline is connected to the inlet end of the separator. A check valve and a stop valve are sequentially arranged on the drain pipeline.

[0008] Preferably, a pressure valve cover is arranged on the exhaust valve of the cylinder. A drain channel is arranged on the side wall of the exhaust valve. A drain port flange connected to the drain pipeline is arranged outside the drain channel. A valve hole cover is arranged at the bottom of the exhaust valve. The valve hole cover and the exhaust valve are connected by bolts and nuts.

[0009] Preferably, a liquid discharge port is provided at the bottom of the separator, and a vent port is provided at the top.

[0010] Preferably, the stop valve is in a normally open mode.

[0011] Beneficial effects

[0012] The utility model provides an oil-lubricated single-acting cylinder structure, which has the following beneficial effects:

[0013] By arranging a liquid discharge pipeline on the non-acting side of the cylinder and connecting it to the inlet end of the separator, the problem of liquid accumulation on the non-acting side is effectively solved. The accumulated liquid is discharged into the separator through the liquid discharge pipeline, the one-way valve and the normally open stop valve, avoiding the "liquid hammer" phenomenon caused by the accumulated liquid during the operation of the compressor, and improving the safety and reliability of the equipment operation.

[0014] A one-way valve is arranged on the liquid discharge channel to ensure that the lubricating oil can only flow in one direction, preventing it from flowing back into the cylinder interior. While ensuring the safe use of the equipment, the one-way valve reduces the number of manual interventions and simplifies the maintenance process.

[0015] The lubricating oil discharge pipeline is connected to the inlet of the separator, and the lubricating oil is discharged into the separator for collection. It is ensured that the gas will not overflow into the external space of the system. It can also be safely used for toxic and harmful process gas systems. Description of the drawings

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a partial enlarged structural schematic diagram of the utility model.

[0018] In the figure: 1. Compressor; 2. Process gas pipeline; 3. Separator; 4. Piston component; 5. One-way valve; 6. Stop valve; 7. Exhaust valve; 8. Pressure valve cover; 9. Liquid discharge port flange; 10. Valve hole cover; 11. Bolt; 12. Nut; 13. Liquid discharge pipeline. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0020] Please refer to Figure 1-2, the present utility model provides a technical solution: an oil-lubricated single-acting cylinder structure, including a separator 3 and a compressor 1. The outlet end of the separator 3 is connected to the cylinder of the compressor 1 through a process gas pipeline 2. A piston component 4 is provided inside the cylinder. A drain pipeline 13 is connected to the non-acting side of the cylinder. One end of the drain pipeline 13 is connected to the inlet end of the separator 3. A check valve 5 and a stop valve 6 are successively provided on the drain pipeline 13.

[0021] In this embodiment, it is further set that a pressure valve cover 8 is provided on the exhaust valve 7 of the cylinder. A drain channel is provided on the side wall of the exhaust valve 7. A drain port flange 9 connected to the drain pipeline 13 is provided outside the drain channel. A valve hole cover 10 is provided at the bottom of the exhaust valve 7. The valve hole cover 10 and the exhaust valve 7 are connected by bolts 11 and nuts 12.

[0022] In this embodiment, it is further set that a drain port is provided at the bottom of the separator 3 and a vent port is provided at the top.

[0023] In this embodiment, it is further set that the stop valve 6 is in a normally open mode.

[0024] Those skilled in the art connect the components in this case in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.

[0025] Embodiment: During operation, liquid accumulates on the non-acting side of the compressor 1. The liquid accumulates will pass through the check valve 5 along the drain pipeline 13. Then, since the stop valve 6 is normally open, the liquid accumulates enter the separator 3 by gravity and the gas force on the non-acting side of the cylinder. In this way, the lubricating oil liquid accumulates on the non-acting side are drained into the separator 3, emptying the liquid accumulates on the non-acting side of the compressor 1, thus avoiding "liquid hammer" during the operation of the compressor 1.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device. Without further limitation. An element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0027] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A single-acting cylinder structure with oil lubrication, characterized in that: The invention comprises a separator (3) and a compressor (1), wherein the outlet end of the separator (3) is connected to the cylinder of the compressor (1) via a process gas pipeline (2), a piston component (4) is provided in the cylinder, a drain pipeline (13) is connected to the non-active side of the cylinder, one end of the drain pipeline (13) is connected to the inlet end of the separator (3), and a one-way valve (5) and a stop valve (6) are provided on the drain pipeline (13) in sequence.

2. The oil-lubricated single-acting cylinder structure according to claim 1, characterized in that: The exhaust valve (7) of the cylinder is provided with a pressure valve cover (8), the side wall of the exhaust valve (7) is provided with a liquid discharge channel, the outer side of the liquid discharge channel is provided with a liquid discharge port flange (9) connected to a liquid discharge pipeline (13), the bottom of the exhaust valve (7) is provided with a valve hole cover (10), and the valve hole cover (10) and the exhaust valve (7) are connected by bolts (11) and nuts (12).

3. The oil-lubricated single-acting cylinder structure according to claim 1, characterized in that: The separator (3) is provided with a liquid discharge port at the bottom and an emptying port at the top.

4. The oil-lubricated single-acting cylinder structure according to claim 1, characterized in that: The stop valve (6) is in a normally open mode.

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