Three-time oil gas recovery gas-liquid separation device and automatic liquid discharge device thereof

Abstract

The utility model provides a tertiary oil gas recovery gas-liquid separation device and an automatic liquid discharging device thereof, and relates to the technical field of automatic liquid discharging devices.The automatic liquid discharging device comprises a first connecting piece, a second connecting piece and a third connecting piece which are connected in sequence, and the second connecting piece is provided with a liquid outlet and a liquid inlet; the first connecting piece is provided with a first cavity for liquid to penetrate through, the liquid inlet penetrates through the second connecting piece in the length direction, a second cavity for containing liquid is formed between the second connecting piece and the third connecting piece, the second connecting piece is provided with a liquid drainage channel, a plug core and a spring, and the spring is arranged in the liquid drainage channel. The blocking core can be far away from the liquid discharging channel in the length direction of the liquid discharging channel so that the liquid discharging channel can be opened or closed through the blocking core, the liquid discharging channel is provided with an inclined face, the blocking core abuts against or is separated from the inclined face under the action of pressure so that closing and opening of the liquid discharging channel can be achieved, and therefore the discharging device can be automatically opened and closed.

Description

Technical Field

[0001] This utility model relates to the technical field of oil-gas separation devices, and in particular to a three-stage oil-gas recovery gas-liquid separation device and its automatic liquid discharge device. Background Technology

[0002] Tertiary vapor recovery recovers and treats excess gases that would otherwise be released into the air from underground oil tanks or oil depots. Tertiary vapor recovery mainly deals with gases released due to temperature changes, volatiles during oil movement, and excess vapors extracted during secondary vapor recovery. Due to environmental requirements, gas stations need to add secondary vapor recovery monitoring systems, requiring a recovery rate between 1.0 and 1.2. Based on the average value and excess volatile gases, tertiary vapor recovery needs to process approximately 20% of the daily oil delivery volume.

[0003] The current three-stage oil and gas recovery technology involves connecting an underground oil tank via pipeline. When the pressure in the underground oil tank reaches a certain value, before the breather valve is opened, the oil and gas in the tank are drawn out for treatment. After treatment, the drawn-out oil and gas meet the emission requirements and are discharged into the atmosphere. The remaining concentrated gas after treatment is partially liquefied and returned to the oil tank. Automatic liquid discharge cannot be achieved. Utility Model Content

[0004] The purpose of this invention is to provide a tertiary oil-gas recovery gas-liquid separation device and its automatic drainage device, so as to solve the technical problem that existing oil-gas recovery gas-liquid separation devices cannot achieve automatic drainage. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides an automatic discharge device, comprising a first connector, a second connector, and a third connector connected in sequence. The second connector is provided with a liquid outlet and a liquid inlet. The first connector has a first cavity through which liquid passes. The second connector has a first through hole extending through the second connector along its length. A second cavity for containing liquid is formed between the second connector and the third connector. The second connector is provided with a discharge channel, a plug, and a spring. The spring is disposed in the discharge channel. The discharge channel has an inclined surface. Under pressure, the plug can move along the length of the discharge channel so that the plug can abut against or move away from the inclined surface, thereby realizing the closing and opening of the discharge channel.

[0007] Preferably, the drainage channel includes a first connecting section, a second connecting section, and a third connecting section arranged sequentially from top to bottom. The second connecting section is configured as the inclined surface. The diameter of the third connecting section is larger than the diameter of the plug core. The diameter of the first connecting section is smaller than the diameter of the plug core. The spring is disposed in the first connecting section. The outlet is connected to the first connecting section.

[0008] Preferably, the plug includes a straight segment and a tapered segment, wherein the inclination of the tapered segment is the same as the inclination of the inclined surface.

[0009] Preferably, the plug core is provided with a first sealing ring that abuts against the inclined surface.

[0010] Preferably, the third connecting segment is provided with a first groove, and a first retaining ring is provided in the first groove to limit the plug core.

[0011] Preferably, a filter screen is provided at the end of the second connector near the first connector, and a stepped groove is provided inside the second connector. The filter screen is located at the first step of the stepped groove, and a second retaining spring is provided at the second step of the stepped groove to hold the filter screen in place.

[0012] Preferably, a second sealing ring is provided between the second connector and the third connector.

[0013] This application also provides a tertiary oil and gas recovery gas-liquid separation device, including any of the above-described automatic discharge devices. The tertiary oil and gas recovery gas-liquid separation device includes a body, on which a discharge port is provided, and the automatic discharge device is installed at the discharge port.

[0014] The technical solution provided in this application document has the following beneficial effects:

[0015] This utility model provides a three-stage oil-gas recovery gas-liquid separation device and its automatic drainage device. The automatic drainage device includes a first connecting member, a second connecting member, and a third connecting member connected in sequence. The second connecting member is provided with an outlet and an inlet. The first connecting member has a first cavity for liquid to pass through. The inlet extends along the length of the second connecting member. A second cavity for containing liquid is formed between the second and third connecting members, facilitating the entry of liquid into the second cavity through the inlet. The second connecting member is provided with a drainage channel, a plug, and a spring. The drainage channel is located at a different position than the inlet. The spring is located within the drainage channel. The plug can move away from the drainage channel along its length, allowing the plug to open or close. The drain channel is designed with an inclined surface. Under pressure, the plug abuts against this inclined surface to close the drain channel. When the spring force is greater than the pressure inside the second chamber, the plug moves away from the inclined surface under spring pressure, allowing liquid to pass smoothly. When the spring force is less than the pressure inside the second chamber, the spring contracts under the pressure inside the chamber, accumulating spring force. Simultaneously, the plug, under pressure, abuts against the inclined surface, closing the drain channel. When the pressure inside the second chamber decreases, the plug moves away from the inclined surface under spring pressure, allowing the oil to flow back into the tank through the drain channel. This design enables the drain device to automatically open and close. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram illustrating the structure of a three-stage oil and gas recovery gas-liquid separation device according to an exemplary embodiment.

[0018] Figure 2 This is a schematic diagram illustrating the mechanism of an automatic draining device according to an exemplary embodiment;

[0019] Figure 3 This is a cross-sectional view of the second connector according to an exemplary embodiment.

[0020] In the diagram: 1. First connector; 2. Second connector; 21. Liquid inlet; 22. Liquid outlet; 23. Drainage channel; 231. First connecting section; 232. Second connecting section; 233. Third connecting section; 24. Plug; 241. Straight section; 242. Conical section; 25. Spring; 26. First groove; 27. First snap ring; 3. Third connector; 4. First sealing ring; 5. Second sealing ring; 6. Filter screen; 7. Second snap ring; 8. Body. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] This specific embodiment provides a three-stage oil and gas recovery gas-liquid separation device and its automatic liquid discharge device, which solves the technical problem that existing oil and gas recovery gas-liquid separation devices cannot achieve automatic liquid discharge.

[0023] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model as described in the claims. Additionally, the complete contents of the structures represented in the following embodiments are not limited to those necessary for the solution of the utility model as described in the claims.

[0024] Reference Figures 1-3This utility model provides a three-stage oil and gas recovery gas-liquid separation device and its automatic drainage device. The automatic drainage device includes a first connecting member 1, a second connecting member 2, and a third connecting member 3 connected in sequence. The second connecting member 2 is provided with a liquid outlet 22 and a liquid inlet 21. The first connecting member 1 has a first cavity through which liquid passes. The liquid inlet 21 extends along the length of the second connecting member 2, and a second cavity for containing liquid is formed between the second connecting member 2 and the third connecting member 3. This facilitates the liquid to enter the second cavity through the liquid inlet 21. The second connecting member 2 is provided with a drainage channel 23, a plug 24, and a spring 25. The position of the drainage channel 23 is different from the position of the liquid inlet 21. The spring 25 is disposed in the drainage channel 23. The plug 24 can move away from the drainage channel 23 along the length of the drainage channel 23, so that the plug 24 can... The drain channel 23 can be opened or closed. Specifically, the drain channel 23 is provided with an inclined surface. Under pressure, the plug core 24 abuts against the inclined surface to close the drain channel 23. When the elastic force of the spring 25 is greater than the pressure in the second cavity, the plug core 24 moves away from the inclined surface under the pressure of the spring to ensure that the liquid can pass smoothly. When the elastic force of the spring 25 is less than the pressure in the second cavity, under the pressure inside the second cavity, the spring 25 contracts and accumulates elastic force. At the same time, the plug core 24 abuts against the inclined surface under the pressure to close the drain channel 23. When the pressure inside the second cavity decreases, the plug core 24 moves away from the inclined surface under the pressure of the spring 25, so that the oil can flow back into the oil tank along the drain channel. With this configuration, the drain device can automatically open and close.

[0025] The scheme is further optimized. The drainage channel 23 includes a first connecting section 231, a second connecting section 232, and a third connecting section 233 arranged sequentially from top to bottom. The second connecting section 232 is set as an inclined surface. The two ends of the second connecting section 232 are respectively connected to the first connecting section 231 and the third connecting section 233. The diameter of the third connecting section 233 is larger than the diameter of the plug core 24, and the diameter of the first connecting section 231 is smaller than the diameter of the plug core 24. The spring 25 is set inside the first connecting section 231. The outlet 22 is connected to the first connecting section 231. When... When the plug 24 is installed in the third connecting section 233, the liquid can be discharged outward through the gap between the plug 24 and the third connecting section 233. When the plug 24 abuts against the second connecting section 232, the drain channel 23 is closed to prevent oil from passing through. When the pressure of the space connected to the second cavity is relatively high, the drain channel 23 is closed. When the pressure of the space connected to the second cavity is relatively low, the liquid in the second cavity can be discharged outward through the drain channel, allowing the oil to flow back into the oil tank.

[0026] To further optimize the design and facilitate the stabilization of the plug core 24, the plug core 24 includes a straight section 241 and a tapered section 242. The straight section 241 allows the plug core to move along the third connecting section 233, avoiding the technical problem of the plug core 24 tipping over. The tapered section 242 ensures the contact area with the second connecting section 232, and the inclination of the tapered section 242 is the same as the inclination of the inclined surface, so that the plug core 24 can fit snugly against the second connecting section.

[0027] To further optimize the design, in order to ensure the sealing effect between the plug core 24 and the inclined surface, a first sealing ring 4 is provided on the plug core 24 to abut against the inclined surface.

[0028] To further optimize the design, in order to prevent the plug core 24 from detaching from the third connecting section 233, a first groove 26 is provided on the side wall of the third connecting section 233. A first retaining spring 27 is provided in the first groove 26 to limit the plug core 24, thus preventing the plug core 24 from detaching from the third connecting section 233. Since the first retaining spring 27 is provided with an opening, it can also facilitate the flow of oil.

[0029] To further optimize the design, in order to prevent impurities from entering the second cavity through the inlet 21, a filter screen 6 is provided at the end of the second connector 2 near the first connector 1. A stepped groove is provided inside the second connector 2, and the filter screen 6 is located at the first step of the stepped groove. A second retaining spring 7 is provided at the second step of the stepped groove to hold the filter screen 6 in place. With this design, the stepped groove can not only prevent the filter screen 6 from falling downwards, but also prevent the filter screen 6 from detaching from the stepped groove due to the second retaining spring 7.

[0030] To further optimize the design, a second sealing ring 5 is provided between the second connector 2 and the third connector 3 to ensure tightness.

[0031] This application also provides a tertiary oil-gas recovery gas-liquid separation device, including any of the above-mentioned automatic discharge devices. The tertiary oil-gas recovery gas-liquid separation device includes a body 8, on which a discharge port is provided. The automatic discharge device is installed at the discharge port. The body 8 is used to hold the gas-liquid mixture. When the internal pressure of the body 8 is greater than the pressure of the spring 25, the plug core 24 moves towards the inclined surface under the action of the gas pressure, thereby causing the plug core 24 to abut against the inclined surface, closing the discharge channel and preventing the oil from flowing. At the same time, the gas is filtered and discharged outward in the body 8, which has reduced the pressure inside the body 8. The elastic force of the spring 25 is greater than the internal pressure of the body 8, and the plug core 24 gradually moves downward, thereby opening the discharge channel to facilitate the flow of liquid.

[0032] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., used herein to indicate the orientation or positional relationship shown in the accompanying drawings, are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In this description, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

[0035] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the content not described in detail in some embodiments can be referred to the same or similar content in other embodiments. The multiple solutions provided in this application contain their own basic solutions, are independent of each other, and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects.

[0036] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An automatic discharge device, characterized in that, The device includes a first connector (1), a second connector (2), and a third connector (3) connected in sequence. The second connector (2) is provided with an outlet (22) and an inlet (21). The first connector (1) has a first cavity through which liquid passes. The second connector (2) has a first through hole that runs through the second connector (2) along its length. The second connector (2) and the third connector (3) form a second cavity for containing liquid. The second connector (2) is provided with a drain channel (23), a plug (24), and a spring (25). The spring (25) is disposed in the drain channel (23). The drain channel (23) is provided with an inclined surface. The plug (24) can move along the length of the drain channel (23) under pressure so that the plug (24) can abut against or move away from the inclined surface, thereby realizing the closing and opening of the drain channel.

2. The automatic discharge device according to claim 1, characterized in that, The drainage channel (23) includes a first connecting section (231), a second connecting section (232), and a third connecting section (233) arranged sequentially from top to bottom. The second connecting section (232) is set as the inclined surface. The diameter of the third connecting section (233) is larger than the diameter of the plug (24). The diameter of the first connecting section (231) is smaller than the diameter of the plug (24). The spring (25) is arranged inside the first connecting section (231). The outlet (22) is connected to the first connecting section (231).

3. The automatic discharge device according to claim 1, characterized in that, The plug (24) includes a straight section (241) and a tapered section (242), the inclination of which is the same as the inclination of the inclined surface.

4. The automatic discharge device according to any one of claims 1-3, characterized in that, The plug core (24) is provided with a first sealing ring (4) that abuts against the inclined surface.

5. The automatic discharge device according to claim 2, characterized in that, The third connecting section (233) is provided with a first groove (26), and a first retaining ring (27) is provided in the first groove (26) to limit the plug (24).

6. The automatic discharge device according to claim 1, characterized in that, The second connector (2) is provided with a filter screen (6) at the end near the first connector (1). The second connector (2) is provided with a stepped groove inside. The filter screen (6) is located at the first step of the stepped groove. A second retaining spring (7) is provided at the second step of the stepped groove to lock the filter screen (6).

7. The automatic discharge device according to claim 1, characterized in that, A second sealing ring (5) is provided between the second connector (2) and the third connector (3).

8. A three-stage oil-gas recovery gas-liquid separation device, characterized in that, The automatic discharge device according to any one of claims 1-7 includes a body (8) with a discharge port on the body (8) and the automatic discharge device installed at the discharge port.

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