A multiphase flow booster mixing device

Abstract

This utility model relates to the field of mixing and conveying devices, and more particularly to a multiphase flow pressurized mixing and conveying device, aiming to solve the problem of cumbersome disassembly and assembly of filter components in the prior art. The device includes a mixing and conveying tank, a feed pipe fixedly connected inside the mixing and conveying tank, a connector detachably installed at the end of the feed pipe, a filter frame disposed inside the connector, a limiting member detachably connected to the connector and used to limit the filter frame, and a locking member for detachably locking the connector to the feed pipe. This utility model achieves a two-stage disassembly and assembly function by setting independently detachable limiting and locking members: removing only the limiting member allows for quick removal of the filter frame for cleaning, simplifying operation; removing the locking member allows for the complete removal of the connector assembly, facilitating maintenance or replacement. This structure significantly improves the ease of maintenance of the filtration system, reducing maintenance difficulty and time costs.

Description

Technical Field

[0001] This utility model relates to the technical field of mixed transport devices, and in particular to a multiphase flow booster mixed transport device. Background Technology

[0002] In oilfield extraction, fluids such as oil and natural gas typically need to be transported over long distances using multiphase transport systems. To ensure transport efficiency, booster equipment installed along the pipeline is essential to achieve pressurized and mixed transport of multiphase flows. Before entering the booster equipment, the fluid usually needs to be filtered to remove impurities.

[0003] In existing multiphase flow booster mixing devices, the filter components are typically installed directly inside the feed pipe. When the filter components need cleaning or replacement due to the interception of large amounts of impurities, operators must enter the pipeline for disassembly and assembly. This process is not only space-constrained and cumbersome, but also time-consuming and labor-intensive, severely impacting equipment maintenance efficiency and the stability of continuous operation. Therefore, simplifying the disassembly and assembly process of the filter components and improving maintenance convenience is a pressing technical problem that needs to be solved in this field. Utility Model Content

[0004] To address the aforementioned problems in the prior art, namely the cumbersome disassembly and assembly of filter components, this utility model provides a multiphase flow boosting and mixing device, comprising:

[0005] A mixing tank is provided, with a mixing vessel fixedly connected to its top. The mixing tank and the mixing vessel are connected by a first connecting pipe and a second connecting pipe. The output end of the mixing tank is connected to a liquid outlet pipe, and the top of the mixing vessel is connected to an air outlet pipe.

[0006] The feed pipe is fixedly connected to the inside of the mixing tank;

[0007] A connector is detachably mounted to the end of the feed tube;

[0008] The filter holder is located inside the connector.

[0009] A limiting member, detachably connected to the connector, is used to limit the filter holder to the inside of the connector;

[0010] A locking element is used to detachably lock the connector onto the feed tube.

[0011] Furthermore, the limiting component is a limiting ring, which is threadedly connected to the inside of the connector and fits against the side surface of the filter frame.

[0012] Furthermore, the locking element is a connecting ring, which is slidably sleeved on the outside of the connector; the outer circumferential surface of the feed tube is provided with a threaded groove, and the connecting ring is threadedly connected to the threaded groove.

[0013] Furthermore, the outer periphery of the end of the feed pipe is provided with a mounting groove for accommodating the connector; it also includes a first sealing ring disposed in the mounting groove, the first sealing ring being used to seal the connection between the feed pipe and the connector.

[0014] Furthermore, it also includes a second sealing ring disposed inside the connector, and the filter frame abuts against the second sealing ring.

[0015] Furthermore, the second connecting pipe is internally connected to a first channel switching valve and a gas channel main valve.

[0016] Furthermore, the first connecting pipe is internally connected to a second channel switching valve and a liquid circulation main valve.

[0017] Furthermore, a Y-type filter, a centrifugal pump, a first check valve, and a three-way ball valve are sequentially connected to the liquid outlet pipe; a second check valve is installed inside the gas outlet pipe.

[0018] Furthermore, the mixing tank has an internal connecting pipe, the other end of which is connected to the output end of the three-way ball valve.

[0019] Furthermore, a lower level gauge is installed inside the mixing tank, and an upper level gauge is installed inside the mixing vessel.

[0020] The beneficial effects of this utility model are:

[0021] (1) In view of the problem that the maintenance of the filter device in the prior art requires disassembly of the main pipeline, which is time-consuming and labor-intensive, this utility model sets the filter frame inside a connector that can be completely disassembled from the end of the feed pipe. When the filter frame needs to be cleaned or replaced, the operator does not need to disassemble the main pipeline of the equipment. He only needs to use the locking part to quickly remove the connector from the feed pipe, and then remove the internal filter frame by removing the limiting part. The whole process does not require complicated tools and a lot of physical labor. The operation steps are greatly simplified, thereby shortening the maintenance work that may have taken several hours to several minutes, greatly improving maintenance efficiency and ensuring the continuity of production.

[0022] (2) This utility model integrates filtration, installation, limiting, and locking functions into a single, modular front-end component. This design, which transfers complex maintenance work to an easy-to-operate dedicated component, avoids additional risks and material consumption such as seal failure and bolt damage that may result from frequent disassembly and assembly of the main pipeline flange. At the same time, due to the significant reduction in maintenance difficulty, the professional skills required of operators are also reduced accordingly, effectively lowering labor costs and overall operation and maintenance costs.

[0023] (3) By setting an easy-to-maintain high-efficiency filter component at the feed end, this utility model can continuously and reliably intercept solid impurities in the oil-gas mixture, thereby preventing these impurities from entering the mixing tank and downstream precision equipment such as pumps and valves from the source, effectively preventing equipment wear and blockage, ensuring the long-term stable operation of the entire multiphase flow booster mixing device, and extending its overall service life. Attached Figure Description

[0024] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of a multiphase flow booster mixing and conveying device proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of a multiphase flow booster mixing device proposed in this utility model;

[0027] Figure 3 The present utility model proposes Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 The present utility model proposes Figure 3 Enlarged view of section B in the middle.

[0029] In the diagram, 1. Mixing tank; 2. Feed pipe; 3. First connecting pipe; 4. Second connecting pipe; 5. First channel switching valve; 6. Air channel main valve; 7. Second channel switching valve; 8. Liquid circulation main valve; 9. Y-type filter; 10. Centrifugal pump; 11. First check valve; 12. Three-way ball valve; 13. Liquid outlet pipe; 14. Air outlet pipe; 15. Second check valve; 16. Upper level gauge; 17. Lower level gauge; 18. Mixing tank; 19. Connector; 20. Locking element; 21. Threaded groove; 22. Mounting groove; 23. First sealing ring; 24. Limiting element; 25. Second sealing ring; 26. Filter frame. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Please refer to Figures 1 to 4 This utility model provides a multiphase flow boosting and mixing device, including: a mixing tank 1; a feed pipe 2 fixedly connected inside the mixing tank 1; a connector 19 detachably installed at the end of the feed pipe 2; a filter frame 26 disposed inside the connector 19; a limiting member 24 detachably connected to the connector 19 and used to limit the filter frame 26; and a locking member 20 for detachably locking the connector 19 to the feed pipe 2.

[0033] In this embodiment, the core of the entire device lies in the innovative quick-release filter structure at the end of the feed pipe 2. Through the coordinated action of the locking member 20 and the limiting member 24, it achieves a two-stage disassembly function. The locking member 20 is responsible for fixing the base unit, the connector 19, to the feed pipe 2, while the limiting member 24 is responsible for fixing the internal filter frame 26 inside the connector 19. This design allows for easy removal of the filter frame 26 for cleaning or replacement during routine maintenance, requiring only the removal of the limiting member 24; when a deeper inspection or replacement of the entire connecting component is needed, the connector 19 assembly can be removed by disassembling the locking member 20. This tiered maintenance mode greatly simplifies the operation process, significantly shortens equipment downtime for maintenance, and solves the pain points of inconvenient, time-consuming, and labor-intensive disassembly and assembly of filter components in existing technologies.

[0034] As a preferred embodiment, see [link to previous document]. Figure 3 The locking element 20 is a connecting ring. The outer circumferential surface of the feed pipe 2 is provided with a threaded groove 21. The connecting ring is slidably sleeved on the outside of the connector 19 and is threadedly engaged with the threaded groove 21 through its internal thread.

[0035] Specifically, the rear end of connector 19 has an outwardly protruding flange, while the connecting ring is fitted onto the front end of connector 19. Its inner diameter is larger than the outer diameter of the connector 19's main body but smaller than the outer diameter of its flange. During installation, connector 19 is first aligned and fitted onto the end of feed pipe 2. Then, the connecting ring is slid forward and rotated so that its internal thread engages with the threaded groove 21 on the outer wall of feed pipe 2. After tightening the connecting ring, one end abuts against the flange of connector 19, generating axial pressure that firmly presses and locks connector 19 onto feed pipe 2. This structure utilizes a mature threaded connection principle, ensuring reliable locking, strong pressure resistance, and intuitive operation. Disassembly and assembly can be quickly completed without special tools, further improving maintenance convenience.

[0036] To ensure the reliability of the connection seal, see Figure 1 and Figure 4 The feed pipe 2 has a mounting groove 22 at its end for mounting the first sealing ring 23. This mounting groove 22 can be an annular groove formed on the end face or outer circumference of the feed pipe 2. The first sealing ring 23 (e.g., an O-ring) is accommodated within the mounting groove 22. When the connector 19 is pressed by the connecting ring, the end face of the connector 19 is tightly pressed against the first sealing ring 23, causing it to elastically deform, thereby forming a reliable static seal between the feed pipe 2 and the mating surface of the connector 19.

[0037] The beneficial effect of this design is that it can effectively prevent oil, gas and other media from leaking from the connection point in a high-pressure working environment of multiphase flow, ensuring the safety and airtightness of the device operation. At the same time, the design of the mounting groove 22 also protects the sealing ring from misalignment or damage during disassembly and assembly.

[0038] As for the fixing method of the internal filtering components, see Figure 4 The limiting member 24 is a limiting ring, and the inner wall of the connector 19 is provided with threads. The limiting ring is connected to the inside of the connector 19 by the threads.

[0039] Specifically, the inner wall of the front opening of the connector 19 is machined with internal threads. After the filter frame 26 is placed into the cavity of the connector 19, the limiting ring with external threads is screwed into the internal threads of the connector 19. After tightening, the inner edge or end face of the limiting ring will abut against and fix the filter frame 26, preventing it from shifting or coming off under fluid impact.

[0040] This fixing method using threaded limiting rings is simple and compact in structure, occupies little space, and also achieves quick, tool-free assembly and disassembly. This design is the core of the first stage of the two-stage disassembly function, namely the rapid cleaning function, and its ease of operation directly determines the significant advantage of this utility model compared to existing technologies.

[0041] To ensure effective filtration, please refer to [link / reference]. Figure 4 The inner wall of the connector 19 is provided with a second sealing ring 25, and the filter frame 26 abuts against the second sealing ring 25.

[0042] Within the internal cavity of connector 19, there is an inner step or annular groove for supporting the filter frame 26, and the second sealing ring 25 is installed within this step or groove. After the filter frame 26 is installed, its rear end abuts against this second sealing ring 25, and is then pressed tightly from the front end by a retaining ring. This ensures that all fluid entering connector 19 is forced to pass through the filter screen of filter frame 26, thus eliminating the possibility of fluid bypassing the gap between filter frame 26 and the inner wall of connector 19, ensuring thorough filtration, and effectively protecting downstream critical equipment such as centrifugal pump 10 from damage by impurities.

[0043] In a complete embodiment, see Figure 1 and Figure 2 The overall structure of this device also includes a mixing tank 18 located on top of the mixing tank 1, and the two are connected by a first connecting pipe 3 and a second connecting pipe 4. The output end of the mixing tank 1 is connected to a liquid outlet pipe 13, and the top of the mixing tank 18 is connected to an air outlet pipe 14. To achieve complex process control, corresponding valves are installed on the pipelines, such as a first channel switching valve 5 and an air channel main valve 6 in the second connecting pipe 4, and a second channel switching valve 7 and a liquid circulation main valve 8 in the first connecting pipe 3. A Y-type filter 9, a centrifugal pump 10, a first check valve 11, and a three-way ball valve 12 are connected in series on the liquid outlet pipe 13. A second check valve 15 is installed on the air outlet pipe 14. In addition, a lower level gauge 17 and an upper level gauge 16 are respectively installed inside the mixing tank 1 and the mixing tank 18 for real-time monitoring of the liquid level.

[0044] Through this complete set of pipe and valve systems, the device can flexibly realize multiple working modes such as liquid drainage and air venting, adapting to different working conditions in oilfield exploitation. The quick-release filter structure described in this utility model is the key front-end component that ensures the long-term stable operation of this complex system.

[0045] The working process of this multiphase flow pressurization and mixing device mainly includes two core stages: liquid discharge and pressurization, and circulation and exhaust. The mode switching is achieved through precise control of pipeline valves, as detailed below:

[0046] 1. Drainage and pressurization stage:

[0047] This stage represents the main operating mode of the device. First, an oil, gas, and water mixture from the oil well enters the device through the feed pipe 2. Before entering the mixing tank 1, the mixture must first pass through a quickly detachable filter assembly located at the end of the feed pipe 2. Specifically, the fluid passes through the filter frame 26, where larger solid impurities and particles are effectively intercepted, thereby protecting downstream precision equipment such as pumps and valves.

[0048] The clean mixture after preliminary filtration enters the mixing tank 1 for preliminary gas-liquid separation. Under the action of gravity, the denser liquid (oil, water) gathers at the bottom of the mixing tank 1, while the less dense gas rises naturally and enters the mixing tank 18 located at the top of the device through the second connecting pipe 4.

[0049] As gas continuously enters the mixing tank 18 from the mixing tank 1, the gas pressure inside the mixing tank 18 will continue to rise. Since the mixing tank 18 and the mixing tank 1 are connected by a pipeline, this continuously rising gas pressure will directly act on the liquid surface inside the mixing tank 1, forming a strong driving force for liquid discharge.

[0050] Under the combined action of the internal air pressure and the centrifugal pump 10 (in the open state), the liquid at the bottom of the mixing tank 1 is forced in and flows out of the outlet pipe 13. The liquid undergoes secondary fine filtration through the Y-type filter 9 in the pipeline, and is then repressurized by the centrifugal pump 10. After passing through the first check valve 11 to prevent backflow, it is finally transported to the downstream pipeline through the three-way ball valve 12. During this working stage, the main air passage valve 6 and the main liquid circulation valve 8, as well as other relevant valves, are all in the open state to ensure smooth air-liquid circulation and pressurization.

[0051] 2. Recirculating exhaust stage:

[0052] When the readings of the upper level gauge 16 and the lower level gauge 17 indicate that there is too much gas (or too high gas pressure) in the mixing tank 18, or that there is too little liquid in the mixing tank 1, the system needs to switch to the circulation exhaust mode to prepare for the next drainage and pressurization cycle.

[0053] At this point, the control system closes the main gas channel valve 6 and the main liquid circulation valve 8 to isolate the gas-liquid circulation channels, and simultaneously switches the flow direction of the three-way ball valve 12. The centrifugal pump 10 continues to operate, but the liquid it pumps is no longer pumped outwards. Instead, it is diverted through the switched three-way ball valve 12 and injected in reverse into the mixing tank 18 via the connecting pipe.

[0054] The injected liquid continuously fills the space of the mixing tank 18, thereby physically displacing and squeezing out the original high-pressure gas inside the tank. The displaced gas is safely discharged from the device through the vent pipe 14 at the top of the mixing tank 18 and the second check valve 15. This process continues until the gas inside the tank is basically emptied and the liquid level reaches the preset value, at which point the device can switch back to the liquid discharge and pressurization stage.

[0055] Maintenance process:

[0056] In any of the aforementioned operating processes, the filter frame 26 located at the device inlet plays a crucial role in intercepting impurities. When excessive impurities accumulate, leading to decreased filtration efficiency or increased system pressure drop, the structural advantages of this invention become apparent. Maintenance personnel can easily remove the filter frame 26 from the connector 19 for cleaning or replacement without disassembling any main pipes or flanges; they can simply unscrew the limiting ring by hand or with simple tools. If the entire connector needs maintenance, the assembly can be removed simply by loosening the connecting ring. This efficient and convenient maintainability significantly reduces equipment downtime, ensuring long-term, stable, and efficient operation of the device, and providing strong support for the continuity of the entire oil and gas mixed transportation process.

[0057] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element 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" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0060] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A multiphase flow booster and mixing device, characterized in that, include: A mixing tank (1) is fixedly connected to a mixing container (18) at the top of the mixing tank (1). The mixing tank (1) and the mixing container (18) are connected by a first connecting pipe (3) and a second connecting pipe (4). The output end of the mixing tank (1) is connected to a liquid outlet pipe (13), and the top of the mixing container (18) is connected to an air outlet pipe (14). The feed pipe (2) is fixedly connected to the inside of the mixing tank (1); The connector (19) is detachably mounted to the end of the feed pipe (2); The filter holder (26) is disposed inside the connector (19); A limiting member (24) is detachably connected to the connector (19) and is used to limit the filter frame (26) inside the connector (19); Locking element (20) for removably locking the connector (19) onto the feed tube (2).

2. The multiphase flow booster and mixing device according to claim 1, characterized in that, The limiting member (24) is a limiting ring, the thread of which is connected to the inside of the connector (19), and the limiting ring is in contact with the side surface of the filter frame (26).

3. The multiphase flow booster and mixing device according to claim 1, characterized in that, The locking element (20) is a connecting ring, which is slidably sleeved on the outside of the connector (19); the outer circumferential surface of the feed pipe (2) is provided with a threaded groove (21), and the connecting ring is threadedly connected to the threaded groove (21).

4. The multiphase flow booster and mixing device according to claim 3, characterized in that, The feed pipe (2) has an installation groove (22) on the outer periphery of its end for accommodating the connector (19); it also includes a first sealing ring (23) disposed in the installation groove (22), the first sealing ring (23) being used to seal the connection between the feed pipe (2) and the connector (19).

5. The multiphase flow booster and mixing device according to claim 2, characterized in that, It also includes a second sealing ring (25) disposed inside the connector (19), and the filter frame (26) abuts against the second sealing ring (25).

6. The multiphase flow booster and mixing device according to claim 1, characterized in that, The second connecting pipe (4) is internally connected to a first channel switching valve (5) and an air channel main valve (6).

7. The multiphase flow booster and mixing device according to claim 1, characterized in that, The first connecting pipe (3) is internally connected to a second channel switching valve (7) and a liquid circulation main valve (8).

8. The multiphase flow booster and mixing device according to claim 1, characterized in that, The liquid outlet pipe (13) is connected in sequence to a Y-type filter (9), a centrifugal pump (10), a first check valve (11) and a three-way ball valve (12); the gas outlet pipe (14) is equipped with a second check valve (15).

9. The multiphase flow booster and mixing device according to claim 8, characterized in that, The mixing tank (18) has an internal connecting pipe, the other end of which is connected to the output end of the three-way ball valve (12).

10. The multiphase flow booster and mixing device according to claim 1, characterized in that, The mixing tank (1) is equipped with a lower level gauge (17), and the mixing tank (18) is equipped with an upper level gauge (16).

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