A shale gas compressor oil and gas cooling separation breather valve

Abstract

The present application relates to natural gas mining process equipment field, disclose a kind of shale gas compressor oil-gas cooling separator breathing valve, including cooling separator, check valve assembly, breathing valve cap assembly, breathing valve cap assembly and crankcase, oil mist first contact stainless steel filter screen, so that the heat of oil mist is absorbed by a small part and cooled to condense into liquid oil flow back to crankcase, most of oil mist is continued to be sucked and moved upwards by breathing gas, when passing through stainless steel packing and heat-absorbing copper plate, heat is further absorbed by steel wire mesh packing and copper plate, oil mist is completely condensed into liquid oil flow back to crankcase, the heat absorbed by steel wire mesh packing and internal heat-absorbing copper plate can be continuously conducted to the breathing valve barrel and the external heat-absorbing copper plate outside the barrel, so that the external heat-absorbing copper plate is continuously blown by the air flow generated by the compressor motor cooling fan to carry away heat, the whole process of breathing valve operation does not need to consume any other power equipment operation, without consuming any material and energy.

Description

Technical Field

[0001] This invention belongs to the technical field of natural gas extraction process equipment, specifically a shale gas compressor oil-gas cooling separation breather valve. Background Technology

[0002] Shale gas refers to unconventional natural gas stored in reservoirs primarily composed of organic-rich shale. my country possesses abundant shale gas reserves, and industrial production is mainly achieved through techniques such as fracturing. Due to the slow decline in shale gas production and a production cycle that can last over 20 years, shale gas reservoirs are poised to become a long-term strategic energy source for my country, serving as a crucial guarantee for our energy security. However, as the formation energy of shale gas wells decreases, their self-flowing capacity gradually declines, and the difficulty of producing water from the gas field increases, impacting shale gas production and even leading to the cessation of gas production due to flooding, resulting in economic losses. Currently, the most effective gas production preservation and recovery technology is the gas lift pressurization and drainage gas recovery method. Gas lift pressurization reduces well resistance and increases transmission pressure, which is beneficial for gas well production, thereby increasing shale gas output. Drainage gas recovery technology is one of the most effective and important measures for tapping the production potential of wells in water-bearing gas reservoirs and improving reservoir recovery rates. The principle of gas lift booster drainage gas production is to use high-pressure gas injected from the casing to activate several gas lift valves installed on the tubing string in stages, gradually lowering the fluid level in the tubing string, thereby restoring the water-flooded gas well to life.

[0003] Gas lift drainage gas production is a gas production process that utilizes the energy of high-pressure natural gas (high-pressure gas wells or compressed natural gas) to inject high-pressure natural gas into the wellbore of a water-producing gas well. The gas lift valve then removes the accumulated liquid in the well, restoring the production capacity of the water-flooded gas well. Based on the different drainage device principles, it can be divided into gas lift valve drainage gas production and plunger gap drainage gas production. Gas lift valve drainage gas production is the most commonly used drainage gas production method in gas fields, while plunger gap drainage gas production is currently still in the experimental stage in Chinese gas fields. Looking at the current shale gas extraction situation in Sichuan, the self-flowing capacity of most shale gas wells declines rapidly after 3 to 5 years of continuous production. However, the formation shale gas reserves are still relatively large and have significant extraction value. Various technological measures can be adopted to extend the production life of gas wells. Currently, gas lift drainage and pressurized transportation are the most mature and important shale gas extraction technologies in Sichuan. Therefore, the scale of gas lift pressurized compressor units put into use is gradually increasing. Currently, a common problem exists in ground equipment for air lift booster systems: almost all compressors suffer from varying degrees of oil leakage in the breather valve. This oil leakage leads to the following issues:

[0004] (1) The "oil leakage" of the breathing valve caused the compressor to have long-term problems of running, leaking, dripping and leaking, which seriously affected the visual perception of the equipment.

[0005] (2) The abnormal consumption of lubricating oil in the on-site compressor unit of shale gas gas lift booster has increased significantly, raising the operating cost of the equipment.

[0006] (3) The oil-gas mixture moves with the wind and settles on the surface of the compressor equipment and the surrounding ground after being cooled, forming oil stains, which attract mosquitoes and dust, seriously affecting the hygiene of the equipment and the environment.

[0007] (4) It greatly increases the workload and intensity of operators in cleaning equipment, and at the same time increases the risk of personnel falling while working on site.

[0008] (5) The increased frequency of equipment cleaning results in a large amount of oily rags (solid waste) that cannot be discarded or recycled, posing a significant disposal challenge. Furthermore, the storage of these rags will cause environmental pollution.

[0009] However, the breathing valves equipped with all the compressors currently used in shale gas lift pressurization sites are breathing valves with only breathing function. They are suitable for container equipment with low breathing frequency, do not have cooling and separation functions, and are not suitable for high-frequency breathing and high-temperature lubricating oil environments.

[0010] (1) Because the existing breather valve does not have an oil-gas cooling and separation function, some of the high-temperature lubricating oil vaporizes and mixes with the breath gas to form an oil-gas mixture. After the oil-containing gas exhaled by breathing is cooled, it settles on the surface of the compressor crankcase cover plate, where a large amount of oil stains accumulate, along with dead mosquitoes. More lubricating oil overflows and accumulates at the bottom of the compressor, causing the grooves in the compressor body base to fill with waste lubricating oil, which overflows onto the ground after it is full. This seriously affects the hygiene and aesthetics of the equipment.

[0011] (2) As the cooling air blown out by the compressor motor fan disperses the oil and gas circulation, the oil and gas are moved to the side of the compressor crankcase, the surrounding walls, and the ground, resulting in oil and dirt residue on the side cover plate and the ground.

[0012] (3) The compressor's various stages of coolers rely on powerful axial fans to draw out cooling airflow to cool the heat sinks to achieve heat exchange. The oil-containing air in the room is forced out to the outside. The air is cooled by the residual lubricating oil on the ground at the rear of the compressor and the residual lubricating oil on the ground at the front of the compressor. After being cooled, the lubricating oil is vaporized and settled on the ground, causing environmental pollution.

[0013] The main reason for oil leakage in existing breather valves is that shale gas lift booster compressors typically operate continuously for long periods, resulting in high exhaust pressure and temperature, and high lubricating oil temperature. Therefore, the lubricating oil is always subject to a certain degree of vaporization. This vaporized lubricating oil enters the breather valve during operation and is expelled from the compressor. Because the compressor operates at a high frequency (1490 rpm) and its frequency matches the breather valve's breathing frequency, a large amount of lubricating oil is expelled from the breather valve, leading to lubricating oil consumption far exceeding normal usage. However, traditional breather valves lack the function of cooling and separating the incoming oil and gas to return the oil to the oil tank and allow the gas to exit the breather valve; this is the root cause of the oil leakage. Summary of the Invention

[0014] The purpose of this invention is to provide a shale gas compressor oil-gas cooling separation breather valve in order to solve the problems mentioned above.

[0015] The technical solution adopted in this invention is as follows: a shale gas compressor oil-gas cooling separation breather valve, comprising a cooling separator, a one-way valve assembly, and a breather valve cap assembly; the cooling separator comprises a container body, the inner wall of which is provided with an inner heat-absorbing plate, the outer wall of which is provided with an outer heat-dissipating plate, and the interior of which is filled with stainless steel packing and a stainless steel filter screen; the one-way valve assembly comprises an inhalation valve flap and an exhalation valve flap; the breather valve cap assembly comprises an exhalation valve cap, which is fitted onto the top of the container body.

[0016] By adopting the above technical solution, when the temperature inside the compressor is high, and due to seasonal climate and other factors, the temperature of the lubricating oil often exceeds 60 degrees Celsius. This causes the warm lubricating oil to vaporize and form oil mist inside the crankcase. Under the breathing force of the breather valve, the oil mist is drawn into the bottom of the breather valve. The oil mist first comes into contact with the stainless steel filter screen, where a small portion of the heat is absorbed and the oil mist cools down and condenses into liquid oil flowing back to the crankcase. Most of the oil mist is continued to be drawn upward by the breathing air. When it passes through the stainless steel packing and the heat-absorbing copper plate, the heat is further absorbed by the wire mesh and the copper plate. All the oil mist condenses into liquid oil and flows back to the crankcase. The breathing air exits the breather valve, and through the wire mesh packing and the internal heat-absorbing copper plate, the heat absorbed by the breather valve can be continuously conducted to the breather valve cylinder and the external heat-absorbing copper plate outside the cylinder. This allows the external heat-absorbing copper plate to be continuously blown away by the airflow generated by the compressor motor cooling fan. The entire working process of the breather valve does not require the operation of any other power equipment, and therefore does not require the consumption of any materials or energy.

[0017] In a preferred embodiment, the crankcase and the cooling separator are interconnected. The crankcase is filled with lubricating oil. When the temperature inside the crankcase exceeds 60 degrees Celsius, the lubricating oil will vaporize to form oil mist. The oil mist enters the cooling separator for cooling and separation under the breathing force of the breather valve.

[0018] By adopting the above technical solution, when the temperature of the lubricating oil in the crankcase exceeds 60 degrees Celsius, it will vaporize to form oil mist. The oil mist will then enter the cooling separator under the breathing force of the breather valve. The cooling separator cools the oil mist through its internal stainless steel filter screen, stainless steel packing, and internal heat absorption plate, thereby absorbing its heat and reducing the oil content in the exhaust gas, making it practical and adaptable.

[0019] In a preferred embodiment, the stainless steel filter screen is located at the bottom of the container body, and the stainless steel packing fills the top of the stainless steel filter screen.

[0020] By adopting the above technical solution, the stainless steel filter screen can perform preliminary cooling and condensation treatment on the oil mist, so that some of the oil mist condenses into liquid oil and flows back to the crankcase after cooling, reducing the burden of subsequent processing. When the oil mist that has been preliminarily treated by the stainless steel filter screen continues to move upward, it will pass through the stainless steel packing, so that it can further absorb heat with the heat-absorbing copper plate, thereby making the oil mist completely condense and flow back, reducing the loss of lubricating oil, and making it comprehensive and convenient.

[0021] In a preferred embodiment, the inner heat-absorbing plate is attached to the inner wall of the container cylinder and in contact with the stainless steel packing, and the inner heat-absorbing plate is attached to the inner wall of the container cylinder by thermally conductive silicone grease.

[0022] By adopting the above technical solution, the thermally conductive silicone grease can be used to fill the gap between the inner heat absorber plate and the inner wall of the container cylinder, thereby reducing the interfacial thermal resistance and improving the efficiency of heat conduction. The installed inner heat absorber plate can more efficiently absorb the heat conducted by the stainless steel packing inside the container cylinder, thereby ensuring the efficient operation of the oil-gas cooling and separation process, and allowing the oil mist to be better cooled, condensed, and refluxed, making it practical and efficient.

[0023] In a preferred embodiment, the outer heat dissipation plate is welded to the outer wall of the container cylinder, and the position of the outer heat dissipation plate corresponds to the airflow path of the compressor motor cooling fan.

[0024] By adopting the above technical solution, the outer heat dissipation plate can be tightly connected to the container body through welding, thereby more effectively transferring the heat on the container body to the outer heat dissipation plate. Through the airflow path of the corresponding compressor motor cooling fan, the airflow generated by the fan can directly blow on the outer heat dissipation plate, thereby removing the heat from its surface and enhancing the heat dissipation effect of the cooling separator, which helps to cool and separate oil and gas. This process does not require the consumption of any materials and energy, making it adaptable and heat dissipation-efficient.

[0025] In a preferred embodiment, the one-way valve assembly is fixed to the top of the container body by a double-ended bolt, and a sealing gasket is provided between the valve seat of the inhalation valve and the exhalation valve and the container body, the sealing gasket being made of polytetrafluoroethylene material.

[0026] By adopting the above technical solution, and using double-headed bolts to fix the one-way valve assembly to the top of the container body, it can better maintain the stability of the connection under conditions such as vibration that the equipment may encounter during operation, preventing damage caused by loosening of the one-way valve assembly. The sealing gasket can enhance the sealing performance of the device, thereby ensuring that the medium inside the equipment does not leak out, and can also effectively prevent the seal from being corroded by chemical substances, ensuring the normal operation and safety of the equipment, and giving it sealing and safety features.

[0027] In a preferred embodiment, the bottom of the container body is connected to the crankcase cover by a single-headed bolt and a polytetrafluoroethylene gasket.

[0028] By adopting the above technical solution, a detachable connection can be formed between the container body and the crankcase cover through the connection of single-headed bolts. This allows for easier removal of the bolts when the equipment needs maintenance, repair, or cleaning of internal components, enabling the container body and crankcase cover to be separated. This facilitates subsequent operation of the equipment's interior, improves the convenience of equipment maintenance, and enhances its adaptability and ease of use.

[0029] In a preferred embodiment, the inhalation valve flap and the exhalation valve flap are made of corrosion-resistant alloy material.

[0030] By adopting the above technical solution, the intake and exhalation valves can control the gas flow direction in the oil-gas cooling separation breather valve of the shale gas compressor. By using corrosion-resistant alloy materials, it can be ensured that the valves can maintain good sealing performance and flexible operation even when in long-term contact with corrosive media, thus ensuring the normal intake and exhalation functions of the breather valve, making it practical and flexible.

[0031] In a preferred embodiment, the stainless steel filler is a honeycomb-structured stainless steel wire ball, and both the inner heat-absorbing plate and the outer heat-dissipating plate are made of copper plate.

[0032] By adopting the above technical solution, the stainless steel packing not only allows it to exchange heat with the oil mist and play a preliminary role in heat absorption, but also increases the contact opportunity between the oil mist and the internal heat absorber plate. The copper plate material provides it with good thermal conductivity, which allows the internal heat absorber plate to quickly absorb the heat transferred from the stainless steel balls and the heat absorbed directly from the oil mist. This causes the oil droplets in the oil mist to condense into liquid and flow back to the crankcase, thus providing thermal conductivity and compatibility.

[0033] In a preferred embodiment, the breather valve cap has an arc-shaped structure, and the top of the breather valve cap has a vent hole with a dust filter inside the hole.

[0034] By adopting the above technical solution, the arc-shaped structure can guide airflow more smoothly through the vent, thereby ensuring efficient gas flow during breathing. By setting a dust filter inside the vent, it can effectively block the entry of external dust and other particles, thus ensuring good ventilation while maintaining efficient filtration of harmful substances, making it both efficient and filtration-oriented.

[0035] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0036] 1. The cooling separation function of the breather valve allows it to cool and condense the oil mist generated in the crankcase, thus enabling the liquid lubricating oil to flow back into the crankcase. This reduces lubricating oil evaporation loss caused by the breathing process and improves oil utilization.

[0037] 2. The initial cooling and condensation of the stainless steel filter screen allows the stainless steel packing and the inner heat absorption plate to further absorb heat. Combined with the auxiliary heat dissipation of the outer heat dissipation plate, it can effectively separate the oil and gas components in the oil mist and reduce the oil content in the exhaust gas.

[0038] 3. Heat is conducted to the outer heat dissipation plate through the inner heat absorption plate, and heat dissipation is achieved by the compressor's own fan airflow or natural convection. As a result, the breathing valve does not require any other power equipment to operate during the entire process, and therefore does not require any materials or energy.

[0039] 4. A polytetrafluoroethylene (PTFE) sealing gasket is installed between the breather valve cap assembly and the container body, and a PTFE gasket is used at the crankcase cover connection. Together with the one-way valve assembly, they can form a bidirectional seal, ensuring that the medium inside the equipment does not leak out.

[0040] 5. The device integrates cooling, separation, and unidirectional flow functions through its overall structure. It is easy to install and disassemble, and is compatible with the compact space design of shale gas compressors, making maintenance and repair convenient. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 This is a cross-sectional view of the cooling separation breather valve in this invention.

[0043] The markings in the diagram are: 1. Lubricating oil; 2. Crankcase; 3. Oil mist; 4. Crankcase cover; 5. Single-ended bolt; 6. Polytetrafluoroethylene gasket; 7. Stainless steel filter screen; 8. Stainless steel packing; 9. Inner heat absorption plate; 10. Outer heat dissipation plate; 11. Double-ended bolt; 12. Sealing gasket; 13. Intake valve flap; 14. Exit valve flap; 15. Exit valve cap. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example:

[0046] Reference Figure 1-2A shale gas compressor oil-gas cooling separation breather valve includes a cooling separator, a one-way valve assembly, and a breather valve cap assembly. The cooling separator includes a container body, with an inner heat-absorbing plate 9 on the inner wall and an outer heat-dissipating plate 10 on the outer wall. The container body is filled with stainless steel packing 8 and a stainless steel filter screen 7. The one-way valve assembly includes an intake valve 13 and an exhalation valve 14. The breather valve cap assembly includes an exhalation valve cap 15, which is fitted onto the top of the container body. When the temperature inside the compressor is high, and due to seasonal climate and other factors, the temperature of lubricating oil 1 often exceeds 60 degrees Celsius. This causes the warm lubricating oil 1 to vaporize inside the crankcase 2, forming oil mist 3. Under the breathing force of the breather valve, the oil mist 3 is drawn into the bottom of the breather valve. The oil mist 3 first comes into contact with the stainless steel filter screen 7, where a small portion of the heat is absorbed and the oil mist condenses into liquid oil that flows back to the crankcase 2. Most of the oil mist 3 is drawn upward by the breathing air. When it passes through the stainless steel packing 8 and the heat-absorbing copper plate, the heat is further absorbed by the wire mesh and the copper plate. All the oil mist condenses into liquid oil and flows back to the crankcase 2. The breathing air exits the breather valve, and through the wire mesh packing and the internal heat-absorbing copper plate, the heat absorbed by the breather valve is continuously conducted to the breather valve cylinder and the external heat-absorbing copper plate outside the cylinder. This allows the external heat-absorbing copper plate to be continuously blown away by the airflow generated by the compressor motor cooling fan. The entire operation of the breather valve does not require any other power equipment to operate, and therefore does not require any materials or energy.

[0047] Reference Figure 1-2 The crankcase 2 is connected to the cooling separator. The crankcase 2 contains lubricating oil 1. When the temperature of the lubricating oil 1 inside the crankcase 2 exceeds 60 degrees Celsius, it vaporizes to form oil mist 3. The oil mist 3 enters the cooling separator under the breathing force of the breather valve for cooling and separation. The cooling separator cools the oil mist 3 through its internal stainless steel filter screen 7, stainless steel packing 8, and internal heat-absorbing plate 9, thereby absorbing its heat and reducing the oil content in the exhaust gas, making it practical and adaptable.

[0048] Reference Figure 2The stainless steel filter screen 7 is located at the bottom of the container cylinder, and the stainless steel packing 8 fills the top of the stainless steel filter screen 7. The stainless steel filter screen 7 can perform preliminary cooling and condensation treatment on the oil mist 3, so that some of the oil mist condenses into liquid oil and flows back to the crankcase 2 after cooling, reducing the burden of subsequent processing. When the oil mist that has been preliminarily treated by the stainless steel filter screen 7 continues to move upward, it will pass through the stainless steel packing 8, so that it can further absorb heat with the heat-absorbing copper plate, thereby making the oil mist 3 completely condense and flow back, reducing the loss of lubricating oil 1, and making it comprehensive and convenient.

[0049] Reference Figure 2 The inner heat-absorbing plate 9 is attached to the inner wall of the container cylinder and in contact with the stainless steel packing 8. The inner heat-absorbing plate 9 and the inner wall of the container cylinder are bonded together by thermally conductive silicone grease. The thermally conductive silicone grease can fill the gap between the inner heat-absorbing plate 9 and the inner wall of the container cylinder, thereby reducing the interfacial thermal resistance and improving the efficiency of heat conduction. The installed inner heat-absorbing plate 9 can more efficiently absorb the heat conducted by the stainless steel packing 8 in the container cylinder, thereby ensuring the efficient operation of the oil-gas cooling and separation process. This allows the oil mist 3 to be better cooled, condensed, and refluxed, making it practical and efficient.

[0050] Reference Figure 2 The outer heat dissipation plate 10 is welded to the outer wall of the container body, and the position of the outer heat dissipation plate 10 corresponds to the airflow path of the compressor motor cooling fan. Welding ensures a tight connection between the outer heat dissipation plate 10 and the container body, allowing for more efficient heat transfer from the container body to the outer heat dissipation plate 10. The airflow path of the compressor motor cooling fan allows the fan to directly blow air onto the outer heat dissipation plate 10, removing heat from its surface and enhancing the heat dissipation effect of the cooling separator. This process facilitates the cooling and separation of oil and gas without consuming any materials or energy, making it adaptable and efficient in heat dissipation.

[0051] Reference Figure 2 The one-way valve assembly is fixed to the top of the container body by double-ended bolts 11. A sealing gasket 12, made of polytetrafluoroethylene (PTFE), is placed between the valve seat of the inhalation valve 13 and the exhalation valve 14 and the container body. By using double-ended bolts 11 to fix the one-way valve assembly to the top of the container body, the connection can be better maintained under conditions such as vibration that the equipment may encounter during operation, preventing damage caused by loosening of the one-way valve assembly. The sealing gasket 12 enhances the sealing performance of the device, ensuring that the medium inside the equipment does not leak out and effectively preventing chemical corrosion at the seal, thus guaranteeing the normal operation and safety of the equipment and providing both sealing and safety features.

[0052] Reference Figure 2The bottom of the container body is connected to the crankcase cover 4 via a single-ended bolt 5 and a PTFE gasket 6. The single-ended bolt 5 allows for a detachable connection between the container body and the crankcase cover 4. This facilitates easier removal of the bolts when maintenance, repair, or cleaning of internal components is required, enabling separation of the container body and crankcase cover 4 for subsequent internal operations. This improves the convenience of equipment maintenance and enhances its adaptability and ease of use.

[0053] Reference Figure 2 The inhalation valve 13 and the exhalation valve 14 are made of corrosion-resistant alloy material. These valves, in the shale gas compressor oil-gas cooling separation breather valve, control the gas flow direction. The use of corrosion-resistant alloy material ensures that the valves maintain good sealing performance and operational flexibility even under long-term contact with corrosive media, thus guaranteeing the normal inhalation and exhalation functions of the breather valve and making it practical and flexible.

[0054] Reference Figure 2 The stainless steel packing 8 consists of honeycomb-structured stainless steel wire balls, while the inner heat-absorbing plate 9 and the outer heat-dissipating plate 10 are both made of copper plates. The stainless steel packing 8 not only facilitates heat exchange with the oil mist 3, providing initial heat absorption, but also increases the contact opportunity between the oil mist 3 and the inner heat-absorbing plate 9. The copper plate material provides excellent thermal conductivity, allowing the inner heat-absorbing plate 9 to quickly absorb the heat transferred from the stainless steel wire balls and the heat absorbed directly from the oil mist 3. This causes the oil droplets in the oil mist 3 to condense into a liquid and flow back to the crankcase 2, thus ensuring thermal conductivity and compatibility.

[0055] Reference Figure 1-2 The breathing valve cap 15 has an arc-shaped structure, with a vent hole at the top and a dust filter inside the hole. The arc-shaped structure guides airflow more smoothly through the vent hole, ensuring efficient gas flow during breathing. The dust filter inside the vent hole effectively blocks the entry of external dust and other particles, thus ensuring both good ventilation and efficient filtration of harmful substances, giving it both high efficiency and filtering capability.

[0056] The implementation principle of an embodiment of an oil-gas cooling separation breather valve for a shale gas compressor according to the present invention is as follows: When the temperature inside the compressor is high, and due to seasonal climate temperature and other factors, the temperature of the lubricating oil 1 often exceeds 60 degrees Celsius, causing the warm lubricating oil 1 to vaporize inside the crankcase 2 to form oil mist 3. Under the breathing force of the breather valve, the oil mist 3 is drawn into the bottom of the breather valve. The oil mist 3 first contacts the stainless steel filter screen 7, causing a small portion of the heat of the oil mist 3 to be absorbed and cooled, condensing into liquid oil that flows back to the crankcase 2. Most of the oil mist 3 is then absorbed by the breathing gas. As the valve continues to move upwards, passing through the stainless steel packing 8 and the heat-absorbing copper plate, the heat is further absorbed by the wire mesh and copper plate. All the oil mist condenses into liquid oil and flows back to the crankcase 2. The breather gas exits the breather valve. Through the wire mesh packing and the internal heat-absorbing copper plate, the heat absorbed by the breather valve can be continuously transferred to the breather valve cylinder and the external heat-absorbing copper plate outside the cylinder. As a result, the external heat-absorbing copper plate is continuously blown away by the airflow generated by the compressor motor cooling fan. The entire working process of the breather valve does not require the consumption of any other power equipment, and therefore does not require the consumption of any materials or energy.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shale gas compressor oil-gas cooling separation breather valve, characterized in that, The system includes a cooling separator, a one-way valve assembly, a breather valve cap assembly, and a crankcase (2). The cooling separator includes a container body, the inner wall of which is provided with an inner heat-absorbing plate (9), the outer wall of which is provided with an outer heat-dissipating plate (10), and the interior of which is filled with stainless steel packing (8) and a stainless steel filter screen (7). The one-way valve assembly includes an inhalation valve (13) and an exhalation valve (14). The breather valve cap assembly includes an exhalation valve cap (15), which is fitted onto the top of the container body.

2. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The crankcase (2) is connected to the cooling separator. The crankcase (2) is filled with lubricating oil (1). When the temperature inside the crankcase (2) exceeds 60 degrees Celsius, the lubricating oil (1) will vaporize to form oil mist (3). The oil mist (3) enters the cooling separator for cooling and separation under the breathing force of the breather valve.

3. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The stainless steel filter screen (7) is located at the bottom of the container body, and the stainless steel filler (8) is filled above the stainless steel filter screen (7).

4. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The inner heat-absorbing plate (9) is attached to the inner wall of the container cylinder and in contact with the stainless steel packing (8), and the inner heat-absorbing plate (9) is attached to the inner wall of the container cylinder by thermally conductive silicone grease.

5. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The external heat dissipation plate (10) is welded to the outer wall of the container body, and the position of the external heat dissipation plate (10) corresponds to the airflow path of the compressor motor cooling fan.

6. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The one-way valve assembly is fixed to the top of the container body by a double-headed bolt (11). A sealing gasket (12) is provided between the valve seat of the inhalation valve (13) and the exhalation valve (14) and the container body. The sealing gasket (12) is made of polytetrafluoroethylene.

7. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The bottom of the container body is connected to the crankcase cover (4) by a single-headed bolt (5) and a polytetrafluoroethylene gasket (6).

8. The shale gas compressor oil-gas cooling separation breather valve as described in claim 6, characterized in that: The inhalation valve (13) and the exhalation valve (14) are made of corrosion-resistant alloy materials.

9. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The stainless steel filler (8) is a honeycomb structure of stainless steel wire balls, and the inner heat absorption plate (9) and the outer heat dissipation plate (10) are both made of copper plate.

10. The shale gas compressor oil-gas cooling separation breather valve as described in claim 1, characterized in that: The breathing valve cap (15) has an arc-shaped structure, and the top of the breathing valve cap (15) has a ventilation hole and a dust filter is installed inside the hole.

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