Compressor system for stabilizing pressure of crude oil tank

Abstract

The utility model discloses a compressor system for crude oil tank pressure stabilization, which belongs to the technical field of crude oil tank pressure stabilization and comprises a pressure stabilization tank, and the top of the pressure stabilization tank is communicated with the top of an oil tank through an air inlet pipe. An inlet of the screw pressurizing assembly is communicated with the top of the pressure stabilizing tank; one end of the air outlet pipe assembly is communicated with an outlet of the screw pressurizing assembly, and the other end of the air outlet pipe assembly is communicated with a low-pressure user pipe network; the pressure sensor is arranged at the top of the oil tank, is suitable for detecting gas pressure at the top of the oil tank, is in communication connection with the gas outlet pipe assembly and is suitable for controlling gas in the gas outlet pipe assembly to flow back when the gas pressure at the top of the oil tank is lower than a threshold value. According to the compressor system designed by the utility model, through an automatic pressure monitoring and gas backflow mechanism, the internal pressure of the crude oil tank is always in a safe range, and the risk caused by too low or too high pressure is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to crude oil tank pressure stabilizing technical field, specifically relates to the compressor system for crude oil tank pressure stabilizing. BACKGROUND

[0002] In the related art, crude oil is stored in the crude oil tank, and the oil gas ratio in the crude oil tank is affected when the crude oil is discharged and filled. In order to ensure that the gas pressure in the crude oil tank is stable within a certain range, in the prior art, the gas in the crude oil tank is pumped to stabilize the gas pressure in the crude oil tank. However, when the gas is pumped excessively, the internal gas pressure of the crude oil tank is too low, thereby causing a safety problem. UTILITY MODEL CONTENT

[0003] The utility model aims at at least solving one of the technical problems in the prior art. Therefore, one purpose of the utility model is to provide a compressor system for crude oil tank pressure stabilization.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0005] The utility model provides a compressor system for crude oil tank pressure stabilization, comprising: a pressure stabilizing tank, the top of the pressure stabilizing tank is communicated with the top of the oil tank through a gas inlet pipe; a screw supercharging assembly, the inlet of the screw supercharging assembly is communicated with the top of the pressure stabilizing tank; a gas outlet pipe assembly, one end of the gas outlet pipe assembly is communicated with the outlet of the screw supercharging assembly, and the other end of the gas outlet pipe assembly is communicated with a low-pressure user pipe network; a pressure sensor, the pressure sensor is arranged at the top of the oil tank, the pressure sensor is suitable for detecting the gas pressure at the top of the oil tank, the pressure sensor is in communication connection with the gas outlet pipe assembly, and the pressure sensor is suitable for controlling the gas backflow in the gas outlet pipe assembly when the gas pressure at the top of the oil tank is lower than a threshold value.

[0006] According to the compressor system for crude oil tank pressure stabilization of the utility model, through the automatic pressure monitoring and gas backflow mechanism, it is ensured that the internal pressure of the crude oil tank is always within a safe range, the risks caused by excessively low or high pressure are reduced, and the automatic control system improves the response speed and accuracy of the compressor system, ensures the long-term stable operation state. Of course, maintaining appropriate internal pressure of the oil tank helps to improve the gas recovery efficiency and reduce unnecessary energy consumption. At the same time, through effective recycling of combustible gas, the amount of pollutants discharged into the atmosphere is reduced, and energy saving and emission reduction are realized.

[0007] Further, the gas outlet pipe assembly comprises: a first pipe body, one end of the first pipe body being in communication with the outlet of the screw pressurization assembly; a second pipe body, one end of the second pipe body being in communication with a low-pressure user pipe network; a first control valve, the first control valve being adapted to communicate the other end of the first pipe body with the other end of the second pipe body, the first control valve being in communication with the pressure sensor, the pressure sensor being adapted to control the operation of the first control valve.

[0008] Further, the pressure sensor is adapted to selectively change the opening and closing value of the first control valve.

[0009] Further, the first control valve comprises: a valve body, the valve body being adapted to communicate the other end of the first pipe body with the other end of the second pipe body; a rotating plate, the rotating plate being rotatably arranged in the valve body, the rotating plate being rotated to open or close the valve body; a driving motor, the driving motor having a rotatable driving end, the driving end being connected with the rotating plate, the driving motor being in communication with the pressure sensor.

[0010] Further, the gas outlet pipe assembly further comprises: a second control valve, the second control valve being arranged between the first control valve and the first pipe body or the second pipe body, the second control valve being adapted to selectively communicate the first control valve with the first pipe body or the second pipe body; wherein the second control valve is provided with an operating handle, the operating handle being rotated to selectively control the opening or closing of the second control valve.

[0011] Further, the screw pressurization assembly comprises: a screw compressor, an inlet of the screw compressor being in communication with the top of the pressure stabilizing tank, an outlet of the screw compressor being adapted to communicate with the gas outlet pipe assembly.

[0012] Further, the screw pressurization assembly further comprises: an oil-gas separator, the oil-gas separator being arranged between the screw compressor and the gas outlet pipe assembly, and the oil-gas separator being adapted to communicate the screw compressor with the gas outlet pipe assembly.

[0013] Further, the screw pressurization assembly further comprises: an air cooler, the air cooler being arranged between the oil-gas separator and the gas outlet pipe assembly, one end of the air cooler being in communication with the oil-gas separator; a separation tank, the separation tank being arranged between the air cooler and the gas outlet pipe assembly, the separation tank being adapted to communicate the other end of the air cooler with the gas outlet pipe assembly.

[0014] Further, the screw pressurization assembly further comprises: a blowdown assembly, the blowdown assembly being selectively in communication with the bottom of the pressure stabilizing tank, the blowdown assembly being adapted to communicate with the pressure stabilizing tank when the amount of waste oil at the bottom of the pressure stabilizing tank exceeds a threshold value, so as to discharge the waste oil at the bottom of the pressure stabilizing tank.

[0015] The other advantages, objects, and features of the present application will become apparent from the following specification, and it is intended to be covered by the following claims, and it will be apparent that changes can be made in the application without departing from the scope of the application, and it is intended to cover what is described in the specification and its procedural equivalents. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is described with the following drawings:

[0017] Fig. 1 is a front view of the compressor system of the present application;

[0018] Fig. 2 is a top view of the compressor system of the present application;

[0019] Fig. 3 is a partial structure schematic view of the air outlet pipe assembly of the present application.

[0020] The symbols in the drawings are as follows:

[0021] 1, compressor system;

[0022] 10, pressure stabilizing tank;

[0023] 21, screw compressor; 22, oil-gas separator; 23, air cooler; 24, separation tank;

[0024] 30, air outlet pipe assembly; 31, first pipe body; 32, second pipe body; 33, first control valve; 331, driving motor; 34, second control valve; 341, operating handle;

[0025] 40, blowdown assembly; 50, air inlet pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is described with the following drawings:

[0027] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without these specific details. In other instances, well-known structures, circuits, materials or methods have not been described in detail in order to avoid obscuring the present application.

[0028] Reference throughout this specification to "one embodiment", "an embodiment", "one example", or "an example", means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the application. Thus, appearances of the phrases "in one embodiment", "in an embodiment", "in one example", or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, the inventor herein has provided multiple examples solely to more particularly illustrate the application. As such, the examples provided herein should not be interpreted to limit the scope of the application, as the spirit and scope of the application are to be given the broadest interpretation of the claims and are not to be limited to the examples provided.

[0029] In the description of the application, it is to be understood that the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", and the like, indicate the orientation or position of the apparatus or element as shown in the drawings, and are for convenience only to facilitate the description of the application and the simplification of the description, and do not indicate or imply that the apparatus or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of protection of the application.

[0030] Embodiment one:

[0031] As shown in Figs. 1-3 The utility model provides a compressor system 1 for crude oil tank pressure stabilization, comprising: pressure tank 10, screw supercharging component, gas pipe subassembly 30 and pressure sensor, the top of pressure tank 10 is communicated with the top of oil tank through air inlet pipe 50, the import of screw supercharging component is communicated with the top of pressure tank 10, one end of gas pipe subassembly 30 is communicated with the export of screw supercharging component, the other end of gas pipe subassembly 30 is communicated with low pressure user pipe network, pressure sensor sets up at the top of oil tank, and pressure sensor is suitable for detecting the gas pressure of the top of oil tank, and pressure sensor is communicated with gas pipe subassembly 30, and pressure sensor is suitable for controlling the gas backflow in gas pipe subassembly 30 when the gas pressure of the top of oil tank is lower than threshold value.

[0032] In some embodiments, the top of the surge tank 10 is in communication with the top of the oil tank through the gas inlet pipe 50, the surge tank 10 is adapted to receive gas from the top of the oil tank to play a role of preliminary pressure stabilization, the inlet of the screw supercharging assembly is in communication with the top of the surge tank 10, the screw supercharging assembly can compress and supercharge the gas entering from the surge tank 10 to ensure that the gas can be delivered to the low-pressure user pipe network, one end of the gas outlet pipe assembly 30 is in communication with the outlet of the screw supercharging assembly, and the other end of the gas outlet pipe assembly 30 is in communication with the low-pressure user pipe network, the gas outlet pipe assembly 30 is responsible for delivering the high-pressure gas processed by the screw supercharging assembly to the low-pressure user pipe network, and the pressure sensor is arranged at the top of the oil tank, the pressure sensor is in communication connection with the gas outlet pipe assembly 30, the pressure sensor is adapted to monitor the gas pressure at the top of the oil tank in real time, and when it is detected that the gas pressure at the top of the oil tank is lower than a set threshold, the control system is triggered to make the gas in the gas outlet pipe assembly 30 backflow to the top of the oil tank to maintain the appropriate pressure in the oil tank.

[0033] It can be understood that the gas at the top of the oil tank enters the surge tank 10 through the gas inlet pipe 50, the pressure of the gas is preliminarily stabilized in the surge tank 10, and the stabilized gas then enters the screw supercharging assembly, the screw supercharging assembly is adapted to compress the gas to a higher pressure to be delivered to the low-pressure user pipe network, and the pressure sensor continuously monitors the gas pressure at the top of the oil tank, and if it is detected that the pressure is lower than a set threshold, the pressure sensor sends a signal to the control system to make part of the gas in the gas outlet pipe assembly 30 backflow to the top of the oil tank, so as to maintain the pressure in the oil tank within a safe range, and under normal circumstances, the gas processed and supercharged is delivered to the low-pressure user pipe network through the gas outlet pipe assembly 30 for use.

[0034] It can be understood that the oil tank stores crude oil and the like, and the space at the top of the oil tank is mixed with volatile flammable oil gas, the flammable gas (gas mixed with volatile flammable oil gas) can enter the surge tank 10 through the gas inlet pipe 50 and be filtered and separated in the surge tank 10 (the flammable gas may be separated into mixed gas and crude oil after entering the surge tank 10, the crude oil is at the bottom of the surge tank 10, and the mixed gas is at the top of the surge tank 10, and the mixed gas also contains volatile crude oil), the mixed gas enters the screw supercharging assembly through the communication pipe and enters the low-pressure user pipe network after being supercharged by the screw supercharging assembly. It is worth mentioning that the mixed gas is supercharged to 0.3 MPa by the screw supercharging assembly to meet the delivery requirement to the low-pressure user pipe network.

[0035] The compressor system 1 for stabilizing the pressure of the crude oil tank according to the utility model, through the automatic pressure monitoring and gas backflow mechanism, ensures that the internal pressure of the crude oil tank is always in a safe range, reduces the risk caused by excessively low or high pressure, and moreover, the automatic control system improves the response speed and accuracy of the compressor system 1, ensures long-term stable operation, of course, maintaining proper internal pressure of the oil tank helps to improve the gas recovery efficiency and reduce unnecessary energy consumption, simultaneously, through effective recycling of combustible gas, the amount of pollutants discharged into the atmosphere is reduced, and energy saving and emission reduction are realized.

[0036] Embodiment two:

[0037] The gas outlet pipe assembly 30 comprises a first pipe body 31, a second pipe body 32 and a first control valve 33, one end of the first pipe body 31 is communicated with the outlet of the screw supercharging assembly, one end of the second pipe body 32 is communicated with the low-pressure user pipe network, the first control valve 33 is suitable for communicating the other end of the first pipe body 31 with the other end of the second pipe body 32, the first control valve 33 is in communication connection with the pressure sensor, and the pressure sensor is suitable for controlling the first control valve 33 to work.

[0038] It can be understood that the gas compressed by the screw supercharging assembly first enters the first pipe body 31, the pressure sensor continuously monitors the gas pressure at the top of the oil tank and feeds back data to the control system in real time, if the gas pressure at the top of the oil tank is lower than the set threshold, the pressure sensor triggers the first control valve 33, so that part of the gas or all the gas flows back to the top of the oil tank through the first control valve 33, so as to improve the internal pressure of the oil tank, when the gas pressure at the top of the oil tank returns to the normal range or exceeds the threshold, the first control valve 33 returns to the normal operation mode, allowing the gas to smoothly enter the second pipe body 32 through the first control valve 33 and be finally delivered to the low-pressure user pipe network.

[0039] It is worth noting that under normal circumstances, the treated gas is delivered to the low-pressure user pipe network through the first control valve 33 and the second pipe body 32 for use.

[0040] According to some embodiments of the utility model, the pressure sensor can selectively change the opening and closing value of the first control valve 33.

[0041] It can be understood that the pressure sensor continuously monitors the gas pressure at the top of the oil tank and feeds data to the control system in real time. When the pressure sensor detects that the gas pressure at the top of the oil tank is lower than the set threshold, the pressure sensor can not only trigger the first control valve 33 to return the gas, but also selectively adjust the opening of the first control valve 33 according to the specific pressure situation. If the pressure is slightly lower than the threshold, it may only need to slightly adjust the opening of the first control valve 33 to return a small amount of gas to restore the pressure; if the pressure is significantly lower than the threshold, the opening of the first control valve 33 can be adjusted greatly to ensure that the pressure in the oil tank is quickly increased.

[0042] It is worth mentioning that the compressor system 1 can dynamically adjust the opening and closing degree of the first control valve 33 according to different pressure levels to maintain the pressure in the oil tank within the optimal range. The dynamic response mechanism improves the adaptability and flexibility of the compressor system 1, which can maintain stable operation under different working conditions.

[0043] Embodiment three:

[0044] This embodiment is based on embodiment two, and the first control valve 33 includes a valve body, a rotating plate and a drive motor 331. The valve body is adapted to communicate the other end of the first pipe body 31 with the other end of the second pipe body 32. The rotating plate is rotatably arranged in the valve body and rotates to open or close the valve body. The drive motor 331 has a rotatable drive end connected with the rotating plate. The drive motor 331 is in communication with the pressure sensor.

[0045] In some embodiments, the pressure sensor continuously monitors the gas pressure at the top of the oil tank and feeds data to the control system in real time. When the pressure sensor detects that the gas pressure at the top of the oil tank is lower than the set threshold, the pressure sensor sends a signal to the drive motor 331 to instruct the drive motor 331 to adjust the position of the rotating plate. The drive motor 331 adjusts the angle of the rotating plate by rotating the rotating plate through the drive end of the drive motor 331 according to the received signal, so as to open or close the valve body and control the return or normal conveying of the gas.

[0046] Therefore, by accurately controlling the rotation angle of the rotating plate, the compressor system 1 can more accurately control the gas flow and pressure, reduce unnecessary gas return, optimize energy utilization, and the intelligent adjustment mechanism improves the response speed and accuracy of the compressor system 1, ensuring long-term stable operation, reducing the risk of equipment failure caused by pressure fluctuations. Of course, the communication connection between the drive motor 331 and the pressure sensor realizes automatic control, reduces the need for manual intervention, and improves the overall efficiency of the compressor system 1.

[0047] According to some embodiments of the present application, the gas outlet pipe assembly 30 further comprises: a second control valve 34, which is arranged between the first control valve 33 and the first pipe body 31 or the second pipe body 32, and the second control valve 34 selectively allows the first control valve 33 to communicate with the first pipe body 31 or the second pipe body 32; wherein the second control valve 34 is provided with an operating handle 341, and the operating handle 341 is rotated to selectively control the opening or closing of the second control valve 34.

[0048] In some embodiments, the second control valve 34 is arranged between the first control valve 33 and the first pipe body 31; in other embodiments, the second control valve 34 is arranged between the first control valve 33 and the second pipe body 32, which is not limited here.

[0049] It can be understood that the second control valve 34 is provided with an operating handle 341, and the opening and closing state of the second control valve 34 can be controlled by manually rotating the operating handle 341, and the design of the operating handle 341 allows users to flexibly select whether to allow the first control valve 33 to communicate with the first pipe body 31 or the second pipe body 32 according to actual needs, thereby providing greater operation flexibility and emergency handling capability.

[0050] Of course, under normal operating conditions, the gas flows from the screw supercharging assembly to the first control valve 33 through the first pipe body 31, and then the first control valve 33 determines whether the gas flows back to the oil tank or continues to flow to the low-pressure user pipe network (the second pipe body 32). When additional control of the gas flow path is required, the opening and closing state of the second control valve 34 can be changed by manually rotating the operating handle 341 on the second control valve 34. If the second control valve 34 is open, it allows the gas to flow freely between the first control valve 33 and the first pipe body 31 or the second pipe body 32; if it is closed, it blocks this part of the gas flow path.

[0051] It is worth mentioning that when maintenance or repair of the first control valve 33 or related pipelines is required, the second control valve 34 can be closed to isolate part of the system to ensure safe operation. Moreover, in an emergency, the operating handle 341 can quickly respond to change the gas flow path to avoid potential risks. At the same time, during the system debugging or testing process, the operating handle 341 allows technicians to flexibly adjust the gas flow path to verify different working modes of the system.

[0052] Embodiment four:

[0053] This embodiment is based on embodiment one, and the screw supercharging assembly comprises: a screw compressor 21, the inlet of the screw compressor 21 communicates with the top of the pressure stabilizing tank 10, and the outlet of the screw compressor 21 is adapted to communicate with the gas outlet pipe assembly 30.

[0054] According to some embodiments of the utility model, the screw pressurizing assembly further comprises: an oil-gas separator 22, the oil-gas separator 22 is arranged between the screw compressor 21 and the gas outlet pipe assembly 30, and the oil-gas separator 22 is adapted to communicate the screw compressor 21 with the gas outlet pipe assembly 30.

[0055] It can be understood that the gas compressed by the screw compressor 21 is first treated by the oil-gas separator 22 before entering the low-pressure user pipe network, and the main task of the oil-gas separator 22 is to remove the oil and other liquid impurities entrained in the compressed gas (because the gas is compressed and the temperature is increased, the lubricating oil or other liquids may be separated and mixed into the gas flow, and if not separated, these liquids may damage the subsequent equipment or pollute the delivered gas), the gas treated by the oil-gas separator 22 is more pure, the content of harmful substances is reduced, and thus the gas can be safely delivered to the low-pressure user pipe network for use.

[0056] According to some embodiments of the utility model, the screw pressurizing assembly further comprises: an air cooler 23 and a separation tank 24, the air cooler 23 is arranged between the oil-gas separator 22 and the gas outlet pipe assembly 30, one end of the air cooler 23 is communicated with the oil-gas separator 22, and the separation tank 24 is arranged between the air cooler 23 and the gas outlet pipe assembly 30, and the separation tank 24 is adapted to communicate the other end of the air cooler 23 with the gas outlet pipe assembly 30.

[0057] It can be understood that the main task of the air cooler 23 is to reduce the temperature of the high-temperature gas from the oil-gas separator 22 (the compression process can cause the temperature of the gas to increase significantly, and the excessively high temperature can adversely affect the downstream equipment or does not meet the requirements of some process flows), and the temperature of the cooled gas is more moderate, which helps to maintain the stability of the pressure and flow of the gas in the subsequent delivery process and ensures that the gas can be delivered to the low-pressure user pipe network according to the expected conditions.

[0058] The gas cooled by the air cooler 23 is first treated by the separation tank 24 before entering the low-pressure user pipe network, and the main task of the separation tank 24 is to further separate the liquid substances or small particles that may be left in the gas (even after the treatment of the oil-gas separator 22 and the air cooler 23, there may still be a small amount of liquid droplets or condensate in the gas, and if these substances are not removed, they may damage the downstream equipment or pollute the delivered gas), the separation tank 24 effectively separates the impurities in the gas by gravity settling, centrifugal force or other physical methods, and ensures that the gas delivered to the low-pressure user pipe network is as pure as possible.

[0059] Embodiment five:

[0060] The embodiment is based on the embodiment one, the compressor system 1 further comprises: a blowdown assembly 40, the blowdown assembly 40 is selectively communicated with the bottom of the surge tank 10, the blowdown assembly 40 is adapted to be communicated with the surge tank 10 when the waste oil amount at the bottom of the surge tank 10 exceeds a threshold value, to discharge the waste oil at the bottom of the surge tank 10.

[0061] It can be understood that the surge tank 10 may accumulate a certain amount of waste oil during operation, which is mainly derived from liquid components carried in the gas or leakage of lubricating oil inside the equipment, etc., the blowdown assembly 40 is equipped with a monitoring device (such as a liquid level sensor), which can monitor the waste oil amount at the bottom of the surge tank 10 in real time, when the waste oil amount reaches or exceeds a preset threshold value, the blowdown assembly 40 will start and be communicated with the surge tank 10, to discharge the excess waste oil, to ensure the cleanliness of the internal environment of the surge tank 10 and the normal operation of the supercharging system.

[0062] It is worth mentioning that the communication between the blowdown assembly 40 and the surge tank 10 is selective, that is, it will only be opened when it is necessary to discharge waste oil, and it will remain closed in normal times to prevent gas leakage or other accidents.

[0063] Finally, it is pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A compressor system for stabilizing a crude oil tank, characterized by, include: A pressure stabilizing tank, the top of which is connected to the top of an oil tank via an air inlet pipe; A screw booster assembly, the inlet of which is connected to the top of the pressure stabilizing tank; An exhaust pipe assembly, one end of which is connected to the outlet of the screw booster assembly, and the other end of which is connected to the low-pressure user pipeline network; A pressure sensor is disposed at the top of the oil tank. The pressure sensor is adapted to detect the gas pressure at the top of the oil tank. The pressure sensor is communicatively connected to the gas outlet pipe assembly. The pressure sensor is adapted to control the gas backflow in the gas outlet pipe assembly when the gas pressure at the top of the oil tank is lower than a threshold.

2. The compressor system for pressure stabilization of crude oil tanks as claimed in claim 1 wherein, The air outlet pipe assembly includes: The first tube body, one end of which is connected to the outlet of the screw booster assembly; The second pipe body, one end of which is connected to the low-pressure user pipeline network; A first control valve is adapted to connect the other end of the first pipe body to the other end of the second pipe body. The first control valve is communicatively connected to the pressure sensor, which is adapted to control the operation of the first control valve.

3. The compressor system for pressure stabilization of crude oil tanks as claimed in claim 2 wherein, The pressure sensor can selectively change the opening and closing value of the first control valve.

4. The compressor system for pressure stabilization of crude oil tanks as claimed in claim 3 wherein, The first control valve includes: A valve body body, wherein the valve body body is adapted to connect the other end of the first pipe body to the other end of the second pipe body; A rotating plate is rotatably disposed within the valve body, and the rotating plate rotates to open or close the valve body. A drive motor having a rotatable drive end connected to the rotating plate, and the drive motor being communicatively connected to the pressure sensor.

5. The compressor system for pressure stabilization of crude oil tanks as claimed in claim 2 wherein, The vent pipe assembly also includes: A second control valve is disposed between the first control valve and either the first pipe body or the second pipe body, and the second control valve can selectively connect the first control valve to either the first pipe body or the second pipe body; wherein The second control valve is provided with an operating handle, which can be rotated to selectively control the second control valve to open or close.

6. The compressor system for pressure stabilization of crude oil tanks as claimed in claim 1 wherein, The screw booster assembly includes: A screw compressor, wherein the inlet of the screw compressor is connected to the top of the pressure stabilizing tank, and the outlet of the screw compressor is adapted to be connected to the outlet pipe assembly.

7. The compressor system for stabilizing crude oil tank pressure according to claim 6, characterized in that, The screw booster assembly also includes: An oil-gas separator is disposed between the screw compressor and the outlet pipe assembly, and the oil-gas separator is adapted to connect the screw compressor and the outlet pipe assembly.

8. The compressor system for stabilizing crude oil tank pressure according to claim 7, characterized in that, The screw booster assembly also includes: An air cooler is provided between the oil-gas separator and the outlet pipe assembly, with one end of the air cooler connected to the oil-gas separator. A separator is disposed between the air cooler and the outlet pipe assembly, and the separator is adapted to connect the other end of the air cooler to the outlet pipe assembly.

9. The compressor system for stabilizing crude oil tank pressure according to claim 1, characterized in that, Also includes: A drain assembly is optionally connected to the bottom of the pressure stabilizing tank. The drain assembly is adapted to connect to the pressure stabilizing tank when the amount of waste oil at the bottom of the pressure stabilizing tank exceeds a threshold, so as to discharge the waste oil at the bottom of the pressure stabilizing tank.

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