A large-diameter high-pressure sand prevention fracturing shunt manifold

Abstract

The application discloses a large-passage high-pressure sand-prevention fracturing manifold, wherein branch pipelines are connected to a main pipeline, manual valves and electric valves are arranged in series on the branch pipelines, a total valve is arranged on the main pipeline, the main pipeline and the branch pipelines are arranged on a fixed plate, an auxiliary positioning assembly is arranged on the fixed plate and at the branch pipelines; the auxiliary positioning assembly is used for positioning a pipeline to be connected. The application can simultaneously fracture multiple wells through the multiple sets of branch pipelines arranged in parallel, solves the problem that the fracturing pipeline needs to be disassembled from the middle after fracturing of one well is completed, and the fracturing pipeline for the next well needs to be reassembled, and the problem of long waiting time and low operation efficiency is solved. In addition, the auxiliary positioning assembly is arranged at the interface end of the multiple sets of branch pipelines, the auxiliary positioning assembly is used for positioning the branch pipelines and the pipeline to be connected, and the two are aligned, so that the connection is facilitated.

Description

Technical Field

[0001] This invention relates to the field of fracturing manifold technology, specifically a large-diameter high-pressure sand-proof fracturing manifold. Background Technology

[0002] In large-scale volumetric fracturing operations in oilfields, it is common to encounter situations where multiple wells on a platform or multiple adjacent wells need to be fracturing. The conventional approach is to keep the fracturing truck and fracturing manifold in place, and connect fracturing lines from each well to the same fracturing manifold. Multiple wells use one set of fracturing manifolds, and fracturing of multiple wells on a platform is completed alternately. After fracturing of one well is completed, the fracturing lines must be disassembled in the middle and reassembled for the next well. After reassembly, they are anchored with ground anchors. The process of disassembling and assembling the lines causes long downtime for fracturing and low operational efficiency. Summary of the Invention

[0003] This invention provides a large-diameter high-pressure sand-proof fracturing manifold to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A large-diameter high-pressure sand-proof fracturing manifold includes a main pipeline and several branch pipelines. The branch pipelines are connected to the main pipeline. The branch pipelines are equipped with manual valves and electric valves, which are connected in series. A main valve is installed on the main pipeline. The main pipeline and branch pipelines are both mounted on a fixed plate. An auxiliary positioning component is installed on the fixed plate, and the auxiliary positioning component is located at the branch pipeline.

[0006] The auxiliary positioning component is used to locate the pipeline to be connected.

[0007] Preferably, a pressure relief tank is connected to the end of the main pipeline, and the pressure relief tank is mounted on a fixed plate;

[0008] A filter screen is installed at the connection between the branch pipeline and the main pipeline.

[0009] Preferably, the auxiliary positioning component includes a mounting plate, and a support block is provided on the lower surface of the mounting plate, the support block being fixedly connected to the fixed plate;

[0010] A rectangular groove is provided on the overhead block, and a sliding plate is slidably connected in the rectangular groove. A second screw is threadedly connected in the sliding plate. One end of the second screw is rotatably connected to the rectangular groove, and the other end of the second screw is fixedly connected to the output end of the first motor. The first motor is fixedly connected to the mounting plate.

[0011] A fastening shell is provided on the sliding plate, and a through hole is provided on the fastening shell. Alignment frames are provided on both sides of the fastening shell, and the alignment frames are fixedly connected to the sliding plate. Alignment components are provided on the alignment frames.

[0012] Preferably, a bracket is fixedly connected inside the fastening shell, and a fastening tube is fixedly connected to the bracket, with the fastening tube corresponding to the through hole on the fastening shell;

[0013] A second motor is fixedly connected to the bracket, and a first gear is fixedly connected to the output end of the second motor. The first gear meshes with the second gear, and the second gear is rotatably connected to the fastening tube. A gear plate is provided on the side surface of the second gear, and the gear plate meshes with a third gear. The third gear is rotatably connected to the surface of the fastening tube.

[0014] The third gear is threadedly connected to a first screw rod, which passes through the fastening tube. One end of the first screw rod located inside the fastening tube is fixedly connected to a fastener. A first limiting slide rod is fixedly connected to the fastener, and the first limiting slide rod is slidably connected to the fastening tube.

[0015] Preferably, a third motor is provided inside the sliding plate. The output end of the third motor passes through the lower surface of the sliding plate and is rotatably connected to the lower surface of the sliding plate. A fourth gear is fixedly connected to the output end of the third motor. The fourth gear meshes with a fifth gear. The fifth gear is rotatably connected to the lower surface of the sliding plate. A third screw is threadedly connected to the center of the fifth gear. The third screw passes through the sliding plate. A lifting member is rotatably connected to the upper end of the third screw. A second limiting slide rod is fixedly connected to the lifting member. The second limiting slide rod is slidably connected to the sliding plate.

[0016] A follower is provided on the upper side of the lifting component. The follower is slidably connected to the alignment frame via a slide rod. An alignment component is provided at the top of the slide rod.

[0017] Preferably, a stabilizing component is provided on the branch pipeline, and the stabilizing component is connected in series with the branch pipeline. The stabilizing component is used to stabilize the liquid flow rate in the branch pipeline.

[0018] Preferably, the stabilizing component includes a conduit with a first port and a second port at its two ends. The first port is connected to a branch conduit, and the second port is connected to the conduit to be connected.

[0019] Preferably, a sealing element is provided inside the through pipe, the sealing element is slidably connected to the through pipe, the sealing element is used to adjust the opening of the through pipe, and a first follower rod is fixedly connected to the sealing element, the first follower rod slidably penetrates the side wall of the through pipe;

[0020] An adjusting pipe is provided on the through pipe, the adjusting pipe is connected to the through pipe, the adjusting pipe is connected to an adjusting chamber, a sliding block is slidably connected inside the adjusting chamber, a spring is provided between the sliding block and the connecting end of the adjusting pipe, and a second follower rod is fixedly connected to the sliding block, the second follower rod is slidably connected to the end face of the adjusting chamber through the through pipe;

[0021] The second follower rod is movably connected to the second slide groove at one end of the linkage rod, and the first follower rod is movably connected to the first slide groove at the other end of the linkage rod. The middle section of the linkage rod is rotatably connected to the through pipe.

[0022] Preferably, the middle section of the linkage rod is rotatably connected to the adjusting rod, one end of the adjusting screw is internally threaded onto the adjusting rod, the adjusting screw is rotatably connected to the adjusting tube, and the adjusting rod is slidably connected to the adjusting tube.

[0023] The other end of the adjusting screw is fixedly connected to a second bevel gear, which meshes with the first bevel gear. The first bevel gear is fixedly connected to the adjusting knob, which is rotatably connected to the surface of the pipe.

[0024] Preferably, the connecting pipe is provided with a narrowing section at the point where the regulating pipe is connected.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] This application solves the problem in the prior art that after fracturing one well, the fracturing pipeline must be disconnected from the middle and reassembled for the next well, resulting in long downtime and low operational efficiency, by using multiple sets of branch pipelines arranged in parallel. Furthermore, this application sets auxiliary positioning components at the interface of the multiple sets of branch pipelines to position the branch pipelines and the pipelines to be connected, aligning them for easy connection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the auxiliary positioning component structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the fastening shell of the present invention;

[0030] Figure 4 This is a schematic diagram of the sliding plate driving structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the stable component structure of the present invention;

[0032] Figure 6 This is a partial structural diagram of the stabilizing component of the present invention;

[0033] Figure 7 This is a schematic diagram of the stabilization component adjustment structure of the present invention.

[0034] In the diagram: 1. Main pipe; 2. Fixed plate; 3. Branch pipe; 4. Main valve; 5. Manual valve; 6. Electric valve; 7. Pressure relief tank; 8. Mounting plate; 9. Overhead block; 10. Sliding plate; 11. First motor; 12. Alignment frame; 13. Fastening housing; 14. Alignment component; 15. Bracket; 16. Second motor; 17. First gear; 18. Second gear; 19. Gear disc; 20. Fastening tube; 21. Third gear; 22. First screw; 23. Fastener; 24. First limit slide bar; 25. Pipe to be connected; 26. 27. Second screw; 28. Fourth gear; 29. ​​Fifth gear; 20. Third screw; 31. Second limit slide rod; 32. Lifting component; 33. Follower component; 34. First opening; 35. Sealing component; 36. First follower rod; 37. Linkage rod; 38. First slide groove; 39. Second slide groove; 40. Adjusting pipe; 41. Second opening; 42. Adjusting knob; 43. Adjusting pipe; 44. Adjusting chamber; 45. Sliding block; 46. Second follower rod; 47. First bevel gear; 48. Second bevel gear; 49. Adjusting screw; 40. Adjusting rod. Detailed Implementation

[0035] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the invention. They are merely used to distinguish protective components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0036] Example 1: Please refer to Figure 1 A large-diameter high-pressure sand-proof fracturing manifold includes a main pipeline 1 and several branch pipelines 3. The branch pipelines 3 are connected to the main pipeline 1. The branch pipelines 3 are equipped with manual valves 5 and electric valves 6, which are connected in series. The main pipeline 1 is equipped with a main valve 4. The main pipeline 1 and the branch pipelines 3 are both mounted on a fixed plate 2. The fixed plate 2 is equipped with an auxiliary positioning component, which is located at the branch pipelines 3.

[0037] The auxiliary positioning component is used to position the pipeline 25 to be connected.

[0038] The end of the main pipeline 1 is connected to a pressure relief tank 7, which is mounted on the fixed plate 2;

[0039] A filter screen is installed at the connection between the branch pipeline 3 and the main pipeline 1.

[0040] The working principle and beneficial effects of the above scheme are as follows:

[0041] This application solves the problem in the prior art that after fracturing one well, the fracturing pipeline must be disconnected from the middle and reassembled for the next well, resulting in long downtime and low operational efficiency, by using multiple sets of branch pipelines 3 arranged in parallel. In addition, this application sets auxiliary positioning components at the interface end of the multiple sets of branch pipelines 3 to position the branch pipelines 3 and the pipelines 25 to be connected, aligning them for easy connection.

[0042] Example 2: Please refer to Figures 2-4 Based on Embodiment 1, the auxiliary positioning component includes a mounting plate 8, and a support block 9 is provided on the lower surface of the mounting plate 8. The support block 9 is fixedly connected to the fixing plate 2.

[0043] A rectangular groove is provided on the overhead block 9, and a sliding plate 10 is slidably connected in the rectangular groove. A second screw 26 is threadedly connected in the sliding plate 10. One end of the second screw 26 is rotatably connected to the rectangular groove, and the other end of the second screw 26 is fixedly connected to the output end of the first motor 11. The first motor 11 is fixedly connected to the mounting plate 8.

[0044] The sliding plate 10 is provided with a fastening shell 13, the fastening shell 13 is provided with a through hole, and alignment frames 12 are provided on both sides of the fastening shell 13. The alignment frames 12 are fixedly connected to the sliding plate 10, and alignment components 14 are provided on the alignment frames 12.

[0045] A bracket 15 is fixedly connected inside the fastening shell 13, and a fastening tube 20 is fixedly connected on the bracket 15. The fastening tube 20 is configured to correspond to the through hole on the fastening shell 13.

[0046] A second motor 16 is fixedly connected to the bracket 15. A first gear 17 is fixedly connected to the output end of the second motor 16. The first gear 17 meshes with a second gear 18. The second gear 18 is rotatably connected to the fastening tube 20. A gear plate 19 is provided on the side surface of the second gear 18. The gear plate 19 meshes with a third gear 21. The third gear 21 is rotatably connected to the surface of the fastening tube 20.

[0047] The third gear 21 is threadedly connected to a first screw 22, which passes through the fastening tube 20. One end of the first screw 22 located inside the fastening tube 20 is fixedly connected to a fastener 23. A first limiting slide bar 24 is fixedly connected to the fastener 23, and the first limiting slide bar 24 is slidably connected to the fastening tube 20.

[0048] A third motor is provided inside the sliding plate 10. The output end of the third motor passes through the lower surface of the sliding plate 10 and is rotatably connected to the lower surface of the sliding plate 10. A fourth gear 27 is fixedly connected to the output end of the third motor. The fourth gear 27 meshes with a fifth gear 28. The fifth gear 28 is rotatably connected to the lower surface of the sliding plate 10. A third screw 29 is threadedly connected to the center of the fifth gear 28. The third screw 29 passes through the sliding plate 10. A lifting member 31 is rotatably connected to the upper end of the third screw 29. A second limiting slide rod 30 is fixedly connected to the lifting member 31. The second limiting slide rod 30 is slidably connected to the sliding plate 10.

[0049] The lifting member 31 is provided with a follower member 32 on its upper side. The follower member 32 is slidably connected to the alignment frame 12 via a slide rod. The top of the slide rod is provided with an alignment member 14.

[0050] The alignment element 14 can use laser technology, with one set of alignment elements 14 emitting lasers and another set of alignment elements 14 receiving lasers, as detailed in CN119879785B.

[0051] The working principle and beneficial effects of the above scheme are as follows:

[0052] To position the pipe to be connected 25 so that it meets the orientation for connection with the branch pipe 3, the pipe to be connected 25 is first inserted into the fastening sleeve 20. The second motor 16 is started, driving the first gear 17 to rotate. This, in turn, causes the third gear 21 to rotate via the second gear 18 and the gear disc 19. Under the constraint of the first limiting slide rod 24, the first screw 22 moves towards the center of the fastening sleeve 20. The fastener 23 presses the pipe to be connected 25, positioning it at the center of the fastening sleeve 20. Then, the third motor is started, causing the fourth gear 27 to rotate. This, in turn, causes the third screw 29 to rise via the fifth gear 28, which in turn causes the lifting member 31 to rise until it is positioned at the center of the fastening sleeve 20. When the alignment members 14 on both sides of the fixed shell 13 detect that they are at the same height, the third motor stops. The branch pipe 3 can also be positioned by another set of alignment brackets 12, the fixed shell 13, and the alignment members 14 on the mounting plate 8. After the third motor stops, the first motor 11 is started, which drives the second screw 26 to rotate, causing the sliding plate 10 to move. The movement of the sliding plate 10 brings the pipe to be connected 25 closer to the branch pipe 3 for easy connection. By setting auxiliary positioning components to adjust the position and posture of the pipe to be connected 25, it can match the position of the branch pipe 3, which can greatly reduce the manpower required to connect the branch pipe 3 and the pipe to be connected 25, and at the same time, improve the connection efficiency and accuracy.

[0053] Example 3: Please refer to Figures 5-7 Based on embodiments 1-2, a stabilizing component is provided on the branch pipe 3. The stabilizing component is connected in series with the branch pipe 3 and is used to stabilize the liquid flow rate in the branch pipe 3.

[0054] The stabilizing component includes a conduit with a first port 33 and a second port 40 at its two ends. The first port 33 is connected to the branch conduit 3, and the second port 40 is connected to the conduit 25 to be connected.

[0055] A sealing element 34 is provided inside the through pipe. The sealing element 34 is slidably connected to the through pipe. The sealing element 34 is used to adjust the opening of the through pipe. A first follower rod 35 is fixedly connected to the sealing element 34. The first follower rod 35 slides through the side wall of the through pipe.

[0056] An adjusting pipe 39 is provided on the through pipe, the adjusting pipe 39 is connected to the through pipe, the adjusting pipe 39 is connected to an adjusting chamber 43, a sliding block 44 is slidably connected inside the adjusting chamber 43, a spring is provided between the sliding block 44 and the connecting end of the adjusting pipe 39, and a second follower rod 45 is fixedly connected to the sliding block 44, the second follower rod 45 is slidably connected through the end face of the adjusting chamber 43;

[0057] The second follower rod 45 is movably connected to the second slide groove 38 at one end of the linkage rod 36, and the first follower rod 35 is movably connected to the first slide groove 37 at the other end of the linkage rod 36. The middle section of the linkage rod 36 is rotatably connected to the through pipe.

[0058] The middle section of the linkage rod 36 is rotatably connected to the adjusting rod 49. The adjusting rod 49 is internally threaded to one end of the adjusting screw 48. The adjusting screw 48 is rotatably connected to the adjusting tube 42, and the adjusting rod 49 is slidably connected to the adjusting tube 42.

[0059] The other end of the adjusting screw 48 is fixedly connected to a second bevel gear 47, which meshes with a first bevel gear 46. The first bevel gear 46 is fixedly connected to an adjusting knob 41, which is rotatably connected to the surface of the through pipe.

[0060] The connecting pipe is equipped with 39 narrowing sections at the points where the regulating pipe is installed.

[0061] The working principle and beneficial effects of the above scheme are as follows:

[0062] By setting a stabilizing component to dynamically adjust the fluid flow rate in branch pipeline 3, a stable state is ensured, allowing the fracturing fluid to be evenly distributed to each fracturing segment or fracture network. This prevents some fractures from being overextended or not fully fractured due to flow fluctuations. At the same time, this measure effectively reduces pressure fluctuations, minimizes impact on manifolds, valves, and connections, extends equipment life, and achieves load balancing when multiple pump trucks are operating in parallel, preventing overload of a single unit. In addition, constant flow operation keeps the system pressure stable, significantly reducing the risk of leakage and pipe bursts, and facilitating timely identification of abnormalities and emergency measures by operators, thereby comprehensively improving operational safety and equipment reliability.

[0063] When the liquid flows through the pipe, a negative pressure is formed at the pipe and the regulating pipe 39, causing the sliding block 44 to move towards the regulating pipe 39, which drives the second follower rod 45 to pull the linkage rod 36 to rotate, and causes the first follower rod 35 to move, which drives the sealing part 34 to move, reducing the opening in the pipe, reducing the flow rate, and reaching equilibrium through multiple fluctuations.

[0064] By rotating the adjustment knob 41, the adjustment screw 48 rotates within the adjustment rod 49, changing the fulcrum position of the linkage rod 36, thereby allowing for manual adjustment of the flow rate.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A large-diameter high-pressure sand control fracturing manifold is characterized in that, It comprises a main pipeline (1) and a plurality of branch pipelines (3), the branch pipelines (3) are connected to the main pipeline (1), the branch pipelines (3) are provided with manual valves (5) and electric valves (6), the manual valves (5) and the electric valves (6) are arranged in series, the main pipeline (1) is provided with a total valve (4), the main pipeline (1) and the branch pipelines (3) are arranged on a fixed plate (2), the fixed plate (2) is provided with an auxiliary positioning assembly, and the auxiliary positioning assembly is arranged at the branch pipelines (3); The auxiliary positioning assembly is used for positioning the to-be-connected pipeline (25); The auxiliary positioning assembly comprises a mounting plate (8), and the lower surface of the mounting plate (8) is provided with an overhang block (9) fixedly connected to the fixed plate (2); The overhang block (9) is provided with a rectangular groove, a sliding plate (10) is slidably connected in the rectangular groove, a second screw rod (26) is threadedly connected in the sliding plate (10), one end of the second screw rod (26) is rotatably connected to the rectangular groove, the other end of the second screw rod (26) is fixedly connected to the output end of a first motor (11), and the first motor (11) is fixedly connected to the mounting plate (8); The sliding plate (10) is provided with a fastening shell (13), the fastening shell (13) is provided with a through hole, the fastening shell (13) is provided with a positioning frame (12) on both sides, the positioning frame (12) is fixedly connected to the sliding plate (10), and the positioning frame (12) is provided with a positioning piece (14); The fastening shell (13) is fixedly connected with a support (15), the support (15) is fixedly connected with a fastening pipe cylinder (20), and the fastening pipe cylinder (20) is correspondingly arranged with the through hole in the fastening shell (13); The support (15) is fixedly connected with a second motor (16), the output end of the second motor (16) is fixedly connected with a first gear (17), the first gear (17) is meshed with a second gear (18), the second gear (18) is rotatably connected to the fastening pipe cylinder (20), the side surface of the second gear (18) is provided with a gear disc (19), the gear disc (19) is meshed with a third gear (21), and the third gear (21) is rotatably connected to the surface of the fastening pipe cylinder (20); The center of the third gear (21) is threadedly connected with a first screw rod (22), the first screw rod (22) penetrates through the fastening pipe cylinder (20), one end of the first screw rod (22) in the fastening pipe cylinder (20) is fixedly connected with a fastening piece (23), the fastening piece (23) is fixedly connected with a first limiting sliding rod (24), and the first limiting sliding rod (24) penetrates through and is slidably connected to the fastening pipe cylinder (20); The branch pipeline (3) is provided with a stabilizing assembly, the stabilizing assembly is arranged in series with the branch pipeline (3), and the stabilizing assembly is used for stabilizing the liquid flow rate in the branch pipeline (3); The stabilizing assembly comprises a through pipe, the through pipe has a first port (33) and a second port (40) at two ends, the first port (33) communicates with the branch pipeline (3), and the second port (40) communicates with the to-be-connected pipeline (25). The through pipe is provided with a blocking piece (34) which is slidingly connected to the through pipe and is used to adjust the opening of the through pipe. The blocking piece (34) is fixedly connected with a first follower rod (35) which slidingly penetrates the side wall of the through pipe. The through pipe is provided with an adjusting pipeline (39) which communicates with the through pipe. The adjusting pipeline (39) is connected with an adjusting bin (43). The adjusting bin (43) is slidingly connected with a sliding block (44). The sliding block (44) is provided between the adjusting pipeline (39) and the connecting end of the sliding block (44) with a spring. The sliding block (44) is fixedly connected with a second follower rod (45) which slidingly penetrates the end face of the adjusting bin (43). The second follower rod (45) is movably connected in the second sliding groove (38) at one end of the linkage rod (36). The first follower rod (35) is movably connected in the first sliding groove (37) at the other end of the linkage rod (36). The middle segment of the linkage rod (36) is rotatably connected to the through pipe. The middle segment of the linkage rod (36) is rotatably connected to the adjusting plug rod (49). One end of the adjusting screw rod (48) is threadedly connected in the adjusting plug rod (49). The adjusting screw rod (48) is rotatably connected in the adjusting tube (42). The adjusting plug rod (49) is slidingly connected in the adjusting tube (42). The other end of the adjusting screw rod (48) is fixedly connected with a second bevel gear (47). The second bevel gear (47) is engaged with a first bevel gear (46). The first bevel gear (46) is fixedly connected with an adjusting knob (41). The adjusting knob (41) is rotatably connected to the surface of the through pipe.

2. The large-diameter high-pressure sand prevention and fracturing flow divider according to claim 1, characterized in that, The main pipeline (1) is connected with a pressure relief tank (7) at the end thereof, and the pressure relief tank (7) is arranged on the fixed plate (2); The branch pipeline (3) is provided with a filter screen at the connection with the main pipeline (1).

3. The large-diameter high-pressure sand prevention and fracturing flow divider according to claim 1, characterized in that, The sliding plate (10) is provided with a third motor. The output end of the third motor penetrates the lower surface of the sliding plate (10) and is rotatably connected to the lower surface of the sliding plate (10). The output end of the third motor is fixedly connected with a fourth gear (27). The fourth gear (27) is engaged with a fifth gear (28). The fifth gear (28) is rotatably connected to the lower surface of the sliding plate (10). The center of the fifth gear (28) is threadedly connected with a third screw rod (29). The third screw rod (29) penetrates the sliding plate (10). The upper end of the third screw rod (29) is rotatably connected with a jacking member (31). The jacking member (31) is fixedly connected with a second limiting sliding rod (30). The second limiting sliding rod (30) is slidingly connected to the sliding plate (10). The upper side of the jacking member (31) is provided with a follower (32). The follower (32) is slidingly connected to the alignment frame (12) through a sliding rod. The top end of the sliding rod is provided with an alignment member (14).

4. The large-diameter high-pressure sand prevention and fracturing flow divider according to claim 1, characterized in that, The through pipe is provided with a narrowing section at the position connected with the adjusting pipeline (39).

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