Double-sealing structure

Abstract

The utility model relates to the technical field of sealing structures, in particular to a double-sealing structure which comprises a sealing ring fixedly arranged in a piston compressor, a piston rod is arranged in the sealing ring in a sliding mode, a gap is reserved between the sealing ring and the piston rod due to abrasion, and a first gasket is fixedly arranged in the sealing ring. The section of the first gasket is in a W shape, the V-shaped annular groove in the first gasket can guide flowing of natural gas, accumulation and leakage of the natural gas between the gasket and the annular groove are reduced, the sealing effect is improved, the design of the V-shaped annular groove further endows the first gasket with better elastic recovery capacity, and when the gasket is subjected to pressure, the sealing effect is improved. According to the sealing device, the original shape can be better recovered, so that the long-term sealing effect is kept, the second gasket is arranged for standby sealing, gas leakage is prevented, continuous and stable operation of equipment is ensured, the cavity is formed for collecting leaked natural gas, the utilization rate of resources is increased, and environmental pollution is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, and in particular to a double sealing structure. Background Technology

[0002] Among natural gas compressors, piston compressors are an important type, and their double-seal structure technology is of great significance in ensuring the safe and efficient operation of the compressor.

[0003] A reciprocating compressor is a type of natural gas compressor that compresses gas through the reciprocating motion of a piston. This type of compressor is characterized by high pressure and high flow rate, making it suitable for large-scale natural gas processing plants and pipelines. While reciprocating compressors have a complex structure, their basic components are largely the same, including a cylinder, transmission system, casing, and auxiliary equipment. During operation, an electric motor drives the crankshaft to rotate, which in turn causes the piston to reciprocate via a connecting rod, thus completing the intake, compression, and exhaust processes. Natural gas is a flammable and explosive gas; leaks during compression not only waste resources but can also lead to safety accidents. Therefore, designing a double-sealed structure can significantly improve the compressor's sealing performance and effectively prevent gas leakage.

[0004] In view of the serious problems such as safety hazards, equipment damage, and environmental pollution caused by natural gas leakage from the piston rod during the compression process, a double sealing structure is provided. Utility Model Content

[0005] The main purpose of this invention is to provide a double-sealing structure to solve the serious problems mentioned in related technologies, such as safety hazards, equipment damage, and environmental pollution caused by natural gas leakage from the piston rod during compression.

[0006] To achieve the above objectives, according to one aspect of the present invention, a double-sealing structure is provided, including a sealing ring fixedly disposed within a piston compressor, a piston rod slidably disposed within the sealing ring, a gap being left between the sealing ring and the piston rod due to wear, a first washer fixedly disposed within the sealing ring, the first washer having a W-shaped cross-section, and a channel being provided within the sealing ring to collect leaked natural gas.

[0007] Furthermore, the first washer has a W-shaped cross-section, and two grooves are formed inside the first washer, with the grooves being V-shaped annular, and the inner wall of the first washer is tightly fitted to the piston rod.

[0008] Furthermore, the outer wall of the sealing ring is symmetrically provided with limit blocks on the upper and lower sides, and the limit blocks are snapped into the inner wall of the piston compressor.

[0009] Furthermore, the sealing ring includes a first entity and a second entity, the first entity having two annular grooves, and the first washer being fixedly disposed within the annular grooves.

[0010] Furthermore, an inclined channel is provided between the first entity and the second entity, a straight channel is fixedly connected to one end of the inclined channel, a fixing groove is provided at one end of the straight channel, and a second washer is fixedly installed in the fixing groove, with the inner wall of the second washer tightly fitted to the piston rod.

[0011] Furthermore, a cavity is provided within the first entity, and the cavity is provided with a flow channel communicating with the gap.

[0012] Furthermore, the first and second washers are aluminum washers.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this double sealing structure, a W-shaped first gasket is provided, and a V-shaped annular groove can guide the flow of natural gas, reduce the accumulation and leakage of natural gas between the gasket and the annular groove. This helps to improve the hydrodynamic performance of the sealing ring and improve the sealing effect. The design of the V-shaped annular groove also gives the gasket better elastic recovery ability. When the gasket is subjected to pressure, it can better return to its original shape, thereby maintaining a long-term sealing effect.

[0015] 2. In this double-sealing structure, a second gasket is set as a backup seal to prevent gas leakage, thereby ensuring the continuous and stable operation of the equipment. The cavity is opened to collect leaked natural gas, which improves the utilization rate of resources and effectively reduces environmental pollution. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the double sealing structure in a preferred embodiment of the present invention;

[0017] Figure 2 This is a partial cross-sectional schematic diagram of the double sealing structure in a preferred embodiment of the present invention;

[0018] Figure 3 This is a partial planar schematic diagram of the double-sealing structure in a preferred embodiment of the present invention;

[0019] Figure 4 This is a preferred embodiment of the present invention. Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0020] Figure 5 This is a schematic diagram of the first washer in a preferred embodiment of the present invention.

[0021] Illustration:

[0022] 1. Sealing ring; 11. First solid body; 12. Second solid body; 13. Ring groove; 14. Fixing groove; 15. Cavity; 16. Inclined path; 17. Straight path;

[0023] 2. Piston rod; 3. Limiting block; 4. First washer; 41. Groove; 5. Second washer. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] Please see Figures 1-5 As shown, the purpose of this embodiment is to provide a double sealing structure, including a sealing ring 1 fixedly disposed in a piston compressor, a piston rod 2 slidably disposed in the sealing ring 1, a gap left between the sealing ring 1 and the piston rod 2 due to wear, a first washer 4 fixedly disposed in the sealing ring 1, the first washer 4 having a W-shaped cross section, and a channel provided in the sealing ring 1 to collect leaked natural gas.

[0026] During the operation of the piston compressor, the reciprocating motion of the piston rod 2 and the continuous friction with the sealing ring 1 will cause a gap to exist between the piston rod 2 and the sealing ring 1 over time.

[0027] The first washer 4 has two grooves 41 inside, and the grooves 41 are V-shaped rings. The inner wall of the first washer 4 is in close contact with the piston rod 2.

[0028] Limiting blocks 3 are symmetrically arranged on the upper and lower outer walls of the sealing ring 1. The limiting blocks 3 are snapped onto the inner wall of the piston compressor. The limiting blocks 3 are used to fix the sealing ring 1 inside the piston compressor to prevent it from displacing during the reciprocating motion of the piston rod 2.

[0029] The sealing ring 1 includes a first body 11 and a second body 12, which together constitute the main body of the sealing ring 1 and provide an installation base for the first washer 4. Two annular grooves 13 are formed in the first body 11, and the first washer 4 is fixedly set in the annular grooves 13 to ensure that the first washer 4 can fit tightly against the piston rod 2 to form the first sealing line. The first washer 4 is the first sealing line. When the first washer 4 is worn, most of the natural gas may try to flow upward from the tiny gap between the annular groove 13 and the first washer 4.

[0030] This challenge is addressed by utilizing the design of grooves 41. These grooves not only increase the sealing area and improve the sealing effect, but more importantly, their V-shaped annular design guides the leaked natural gas along a specific path. This makes it easier for the leaked natural gas to be captured and treated by subsequent processing systems, thereby significantly reducing the risk of environmental pollution.

[0031] Furthermore, a cleverly designed short-circuit connection is provided between the two annular grooves 13. This design not only helps to slow down the leakage rate, making the leaking natural gas more obstructed during its flow, but also facilitates subsequent maintenance and repair. When the first gasket 4 needs to be replaced or repaired, personnel can more easily access these annular grooves 13 and the short-circuit, thereby ensuring the durability and reliability of the sealing ring 1.

[0032] An inclined channel 16 is provided between the first entity 11 and the second entity 12. One end of the inclined channel 16 is fixedly connected to a straight channel 17, increasing the complexity of the leakage path and thus slowing down the leakage rate. One end of the straight channel 17 has a fixing groove 14, in which a second washer 5 is fixedly installed. The inner wall of the second washer 5 is tightly fitted to the piston rod 2. The synergistic effect of the inclined channel 16 and the straight channel 17 allows the leaked natural gas to be smoothly guided to the second washer 5 along a preset path. Here, the second washer 5 plays its core sealing function, blocking most of the natural gas from entering.

[0033] However, as the second gasket 5 gradually wears down over long-term use, leakage may occur. This design cleverly disperses the leakage paths, while the fixing groove 14 ensures the stable installation of the second gasket 5. The second gasket 5 blocks natural gas, and as it wears down, a small amount of natural gas will seep out through the tiny gap between the second gasket 5 and the piston rod 2. More natural gas flows through the gap between the second gasket 5 and the fixing groove 14, which not only increases the complexity of the leakage path but also further slows down the leakage rate, buying valuable time for system maintenance and repair. Ultimately, the natural gas leaking from different paths will converge into the gap around the piston rod 2. Despite the leakage, this design minimizes the impact of leakage on system safety and stability by increasing the flow path and slowing down the leakage rate. It also provides clearer and more specific instructions for subsequent maintenance and repair work.

[0034] The first entity 11 also includes a cavity 15. The cavity 15 is equipped with a flow channel communicating with the void. Through the inclined flow channel, most of the leaked natural gas is guided into the cavity 15. Once inside the cavity 15, it can be recovered and processed by a specialized collection system (such as a recovery pipeline installed outside the compressor). This not only significantly improves resource utilization but also effectively reduces environmental pollution and energy waste. Natural gas, as a clean energy source, not only wastes valuable resources when leaked but can also negatively impact the environment. By introducing a leak management system with the cavity 15 and the inclined flow channel, these problems are effectively solved.

[0035] The first gasket 4 and the second gasket 5 are made of aluminum. The use of aluminum is based not only on its good ductility and corrosion resistance, but also on its performance in the operating environment of a natural gas compressor. The ductility of aluminum allows the gasket to maintain a good fit even when the piston rod 2 undergoes minor deformation, thus maintaining an effective seal. At the same time, the corrosion resistance of aluminum is crucial for resisting corrosive components that may be present in natural gas (such as sulfides and moisture), which helps maintain the long-term stability and sealing performance of the gasket.

[0036] The first gasket 4 and the second gasket 5 together form a double sealing structure, which greatly improves the sealing performance. Even if the performance of the first gasket 4 deteriorates due to long-term use or wear, the second gasket 5 can still serve as a backup seal to prevent gas leakage, thereby ensuring the continuous and stable operation of the equipment.

[0037] In practical use, the piston rod 2 slides within the sealing ring 1. With the reciprocating motion of the piston rod 2 and the passage of time, when the first washer 4 wears down, natural gas may flow upwards through the tiny gap between the annular groove 13 and the first washer 4. The groove 41 collects the natural gas and guides the leaking natural gas upwards along the edge of the groove 41. The leaking natural gas flows down to the next first washer 4 through a short channel between the two annular grooves 13, where it is blocked. Further leaking natural gas is guided to the second washer 5 through the inclined channel 16 and the straight channel 17. The inner wall of the second gasket 5 fits tightly against the piston rod 2, blocking most of the natural gas from the outside. As the second gasket 5 gradually wears down, a small portion of the natural gas seeps out from the tiny gap between the second gasket 5 and the piston rod 2, while more natural gas flows through the gap between the second gasket 5 and the fixing groove 14. The leaked natural gas eventually flows into the gap around the piston rod 2. The cavity 15 in the sealing ring 1 is connected to these gaps through an inclined flow channel, guiding most of the leaked natural gas into the cavity 15. The natural gas entering the cavity 15 can be centrally recovered and processed.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A double-sealing structure, comprising a sealing ring (1) fixedly disposed within a piston compressor, wherein a piston rod (2) is slidably disposed within the sealing ring (1), and a gap exists between the sealing ring (1) and the piston rod (2) due to wear, characterized in that, A first washer (4) is fixedly installed inside the sealing ring (1). The first washer (4) has a W-shaped cross section. A channel is also provided inside the sealing ring (1) to collect leaked natural gas.

2. The double-sealing structure according to claim 1, characterized in that, The first washer (4) has two grooves (41) inside, and the grooves (41) are V-shaped rings. The inner wall of the first washer (4) is in close contact with the piston rod (2).

3. The double-sealing structure according to claim 1, characterized in that, The sealing ring (1) has symmetrically arranged limit blocks (3) on its outer wall, and the limit blocks (3) are snapped onto the inner wall of the piston compressor.

4. The double-sealing structure according to claim 1, characterized in that, The sealing ring (1) includes a first body (11) and a second body (12). Two annular grooves (13) are formed in the first body (11), and the first washer (4) is fixedly disposed in the annular grooves (13).

5. The double-sealing structure according to claim 4, characterized in that, An inclined channel (16) is provided between the first entity (11) and the second entity (12). A straight channel (17) is fixedly connected to one end of the inclined channel (16). A fixing groove (14) is provided at one end of the straight channel (17). A second washer (5) is fixedly installed in the fixing groove (14). The inner wall of the second washer (5) is tightly fitted with the piston rod (2).

6. The double-sealing structure according to claim 4, characterized in that, The first entity (11) also has a cavity (15) inside, and the cavity (15) is provided with a flow channel and a gap.

7. The double-sealing structure according to claim 5, characterized in that, The first washer (4) and the second washer (5) are aluminum washers.

Images