Anti-scouring and anti-corrosion fracturing wellhead device

Abstract

The invention discloses an anti-scouring and anti-corrosion fracturing wellhead device, which relates to the technical field of oil exploitation and comprises a main pipeline, an upper box body, a lower bottom pipe and the like. Oil enters the upper box body through the inlet, and impurities are filtered out through the filter screen so as to guarantee the oil quality. The anti-scouring buffer piece in the main pipeline reciprocates along the driving screw, forms an S-shaped oil channel with the arc-shaped protruding section, and is matched with the adjusting rod to control the second blocking plate to block the through hole to adjust the flow, oil impact is doubly relieved, and the service life of the device is prolonged. The intermittent cleaning assembly in the upper box body drives the impeller by means of the impact force of the cleaning liquid, the net brush intermittently rotates forwards and backwards through transmission, the cleaning liquid flushes the filter net in a multi-dimensional mode through the inclined nozzles and the spraying holes, and the cleaning liquid in the liquid storage shell can be recycled. The upper box body is provided with the openable slag outlet, impurities on the filter screen are discharged in time, blocking is avoided, and stable operation of the device is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, specifically to an anti-erosion and anti-corrosion fracturing wellhead device. Background Technology

[0002] As a clean and efficient energy source, coalbed methane requires fracturing wellhead equipment to transport high-pressure media and carry out coal seam fracturing operations during its extraction. The erosion resistance, corrosion resistance, and stable operation capabilities of this equipment directly affect the efficiency and safety of coalbed methane extraction.

[0003] In the existing patent "CN205477499U A shock-resistant and corrosion-resistant fracturing wellhead device", a buffer cavity is formed by setting a threaded connecting plate and a fixed threaded plate inside the upper pipe, and a honeycomb buffer block is built in to achieve shock resistance. At the same time, a metal filter screen is set at the bottom of the upper casing to filter impurities, and a stainless steel two-way nut is used to connect the bottom pipe and the upper pipe. This improves the service life and practicality of the device to a certain extent. However, this improved solution still has obvious shortcomings under the complex working conditions of actual coalbed methane extraction. First, the adaptability and durability of the buffer structure are limited. Although the honeycomb buffer block can initially buffer the impact, the honeycomb pores are easily blocked by impurities in the oil. After long-term use, the buffer capacity will decrease significantly. Moreover, the buffer cavity is a fixed structure and cannot dynamically adjust the buffer strength according to the fluctuation of oil pressure. When facing the instantaneous strong impact in high-pressure fracturing operations, it is still difficult to fully absorb the impact force. Secondly, the filter components are prone to clogging and have high maintenance costs. Metal filter screens can only achieve single-precision filtration and have no self-cleaning function. After impurities accumulate, they can easily cause poor oil flow, requiring frequent shutdowns for disassembly and cleaning, which greatly increases maintenance time and costs. The aforementioned problems mean that the existing improvement solutions still cannot fully meet the harsh working conditions of coalbed methane extraction in terms of erosion resistance, corrosion resistance, and operational stability. The average service life of the equipment is relatively short, and the maintenance frequency is high, which not only increases the extraction cost but may also affect the continuity of extraction operations due to equipment failure.

[0004] Therefore, the present invention provides an anti-erosion and anti-corrosion fracturing wellhead device to solve one or more of the above-mentioned problems. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an anti-erosion and anti-corrosion fracturing wellhead device to solve the problems mentioned in the background section.

[0006] (II) Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solution, including a main pipe, an upper housing, and a lower pipe. The upper housing is installed at one end of the main pipe, and the lower pipe is installed at the other end of the main pipe. A cleaning interface is provided on the outer wall of the main pipe. A filter screen and an intermittent cleaning component are provided inside the upper housing. An outlet is provided on the outer wall of the lower pipe. An arc-shaped protruding section is provided on the inner wall of the main pipe. An anti-erosion buffer is installed inside the main pipe. An adjusting rod extends movably into the lower pipe.

[0007] Preferably, a spray support ring is fixedly installed inside the upper box, and the intermittent cleaning component is connected to the spray support ring through several sets of support pipes. Several spray holes are opened on the outer wall of the spray support ring.

[0008] Preferably, the intermittent cleaning component includes a sealed housing, which is fixedly connected to several sets of support pipes. The sealed housing is also connected to a spray support ring through several sets of support pipes. The outer wall of the sealed housing is provided with a docking hole, which is connected to the cleaning interface.

[0009] Preferably, the flow distribution pipe is fixedly installed at the bottom of the inner wall of the sealed housing, and the flow distribution pipe is connected to the docking hole through the second connecting pipe. The adjusting plate is fixedly connected to the inner wall of the flow distribution pipe, and two sets of through slots are symmetrically opened on the adjusting plate. The dividing plate is installed between the adjusting plate and the inner wall of the flow distribution pipe, and a one-way valve is installed on the dividing plate. One end of the second connecting rod is rotatably connected to the inner wall of the flow distribution pipe, and the other end of the second connecting rod is rotatably connected to the adjusting plate. The first blocking plate is fixedly connected to the second connecting rod, and the first blocking plate is in contact with the bottom of the adjusting plate. The impeller is sleeved on the outer wall of the second connecting rod.

[0010] Preferably, the liquid storage shell is fixedly connected to the inner wall of the sealing shell, the bottom of the liquid storage shell is connected to the flow distribution pipe, the piston is movably disposed inside the liquid storage shell, the bottom of the rack extends movably into the liquid storage shell and is fixedly connected to the piston, the connecting spring is sleeved on the outer wall of the rack, and the two ends of the connecting spring are fixedly connected to the inner wall of the liquid storage shell and the piston, respectively.

[0011] Preferably, the support rod is fixedly connected to the liquid storage shell, the third connecting rod is rotatably connected to the support rod, and a drive gear is fixedly sleeved on one end of the third connecting rod, and a bevel gear is fixedly sleeved on the other end of the third connecting rod, with the drive gear meshing with the rack.

[0012] Preferably, the first connecting rod is movably connected to the filter screen, and a brush is fixedly provided at one end of the first connecting rod. The other end of the first connecting rod movably passes through the hollow disc and extends into the sealed housing. A bevel gear two is fixedly provided at the end of the first connecting rod extending into the sealed housing. The bevel gear one and the bevel gear two mesh with each other. The hollow disc is fixedly provided on the top of the sealed housing, and an oblique nozzle is provided on the top of the hollow disc. The hollow disc is connected to the flow distribution pipe through a connecting pipe one.

[0013] Preferably, the anti-erosion buffer extends inward in the middle to form an arc-shaped concave shape, thereby dividing the outer wall of the anti-erosion buffer into a first adjustment protrusion and a second adjustment protrusion. The anti-erosion buffer is provided with a limiting groove, and the drive screw is connected to the anti-erosion buffer by a thread.

[0014] Preferably, the drive motor is embedded in the lower tube housing, the output shaft of the drive motor is fixedly connected to the drive screw, the adjusting component is movably sleeved on the outer wall of the drive screw, the bevel gear three is fixedly sleeved on the outer wall of the adjusting component, and the end of the adjusting rod extending into the lower tube is fixedly sleeved with the bevel gear four, and the bevel gear three and the bevel gear four mesh with each other.

[0015] Preferably, the bottom pipe is provided with an inclined guide groove, and a through hole is opened at the connection between the inclined guide groove and the main pipe. The outer wall of the adjusting component extends to both sides to form a second blocking plate, and the second blocking plate is used to block the through hole. The top of the adjusting component extends upward to form a symmetrical limiting rod, and the limiting rod is movably set in the limiting groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has a filter screen installed in the upper box, which can effectively filter the oil entering from the inlet and intercept impurities to ensure the high quality of the output oil; the anti-scouring buffer component in the main pipeline, together with the drive screw, adjusting rod and other structures, can form an "S"-shaped oil channel with the arc-shaped protruding section by reciprocating up and down movement; at the same time, the oil flow can be controlled by adjusting the sealing area of ​​the through holes of the second plug plate, which doubly reduces the impact force of the vertically falling oil, avoids wear on the inner wall of the device, and significantly extends the service life of the wellhead device; the intermittent cleaning component can use the impact force of the external cleaning fluid to drive the impeller to rotate, and drive the screen brush through the second connecting rod, rack, bevel gear one, bevel gear two and other transmission structures. The forward and reverse rotation creates an intermittent cleaning action. Simultaneously, part of the cleaning fluid impacts the inner ring of the filter screen through the inclined nozzle, while the other part enters the spray support ring along the support pipe and washes the outer perimeter of the filter screen through the spray holes. When the blocking plate rotates, it changes the direction of the cleaning fluid flow, causing the rinsing pressure of the inclined nozzle to increase periodically, thus enhancing the filter screen unclogging effect. When the connecting spring in the liquid storage shell drives the piston to reset, the cleaning fluid in the shell can be sent back to the flow distribution pipe for reuse, reducing waste of cleaning fluid. Moreover, the cleaning process does not require an additional power source, achieving energy saving. In addition, the openable and closable slag outlet on one side of the upper box can promptly discharge the impurities cleaned from the filter screen, avoiding the accumulation of impurities that could cause pipe blockage or secondary pollution, ensuring smooth oil flow, and ensuring long-term stable operation of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 This is a top view of the spray support ring structure in this invention; Figure 4This is a schematic diagram of the intermittent cleaning component structure in this invention; Figure 5 This is a schematic diagram of the anti-erosion buffer component in this invention; Figure 6 This is a schematic diagram of the internal structure of the lower tube in this invention.

[0018] In the diagram: 1. Main pipe; 2. Upper casing; 3. Lower bottom pipe; 4. Inlet; 5. Cleaning interface; 6. Outlet; 7. Adjusting rod; 8. Filter screen; 9. Arc-shaped protruding section; 10. Intermittent cleaning assembly; 11. Spray support ring; 12. Sealing shell; 13. Support pipe; 14. Spray hole; 15. First connecting rod; 16. Screen brush; 17. Connecting pipe one; 18. Docking hole; 19. Connecting pipe two; 20. Impeller; 21. Flow distribution pipe; 22. Second connecting rod; 23. Blocking plate one; 24. Adjusting plate; 25. Dividing plate; 26. One-way valve; 27. 28. Liquid storage shell; 29. ​​Piston; 30. Connecting spring; 31. Support rod; 32. Rack; 33. Drive gear; 34. Third connecting rod; 35. Bevel gear one; 36. Bevel gear two; 37. Hollow disc; 38. Angled nozzle; 49. Anti-erosion buffer; 40. First adjusting protrusion; 41. Second adjusting protrusion; 42. Arc-shaped concave; 43. Adjusting component; 44. Blocking plate two; 45. Limiting rod; 46. Limiting groove; 47. Drive screw; 48. Bevel gear three; 49. Bevel gear four; 50. Drive motor; 51. Through hole; 52. Angled guide groove. Detailed Implementation

[0019] 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.

[0020] Example 1: Please refer to Figure 1-6The present invention provides a technical means comprising a main pipe 1, an upper housing 2 and a lower bottom pipe 3. The upper housing 2 is installed at one end of the main pipe 1 and the lower bottom pipe 3 is installed at the other end of the main pipe 1. A cleaning interface 5 is provided on the outer wall of the main pipe 1. A filter screen 8 and an intermittent cleaning component 10 are provided inside the upper housing 2. An outlet 6 is provided on the outer wall of the lower bottom pipe 3. An arc-shaped protruding section 9 is provided on the inner wall of the main pipe 1. An anti-erosion buffer 38 is installed inside the main pipe 1. An adjusting rod 7 extends movably into the lower bottom pipe 3.

[0021] Furthermore, a spray support ring 11 is fixedly installed inside the upper housing 2, and the intermittent cleaning component 10 is connected to the spray support ring 11 through several sets of support pipes 13. Several spray holes 14 are opened on the outer wall of the spray support ring 11.

[0022] Furthermore, the anti-erosion buffer 38 extends inward in the middle to form an arc-shaped concave 41, thereby dividing the outer wall of the anti-erosion buffer 38 into a first adjustment protrusion 39 and a second adjustment protrusion 40. The anti-erosion buffer 38 is provided with a limiting groove 45, and the drive screw 46 is connected to the anti-erosion buffer 38 by a thread.

[0023] Furthermore, the drive motor 49 is embedded in the housing of the lower tube 3, the output shaft of the drive motor 49 is fixedly connected to the drive screw 46, the adjusting member 42 is movably sleeved on the outer wall of the drive screw 46, the bevel gear 3 47 is fixedly sleeved on the outer wall of the adjusting member 42, and the end of the adjusting rod 7 extending into the lower tube 3 is fixedly sleeved with the bevel gear 48, and the bevel gear 3 47 and the bevel gear 48 mesh with each other.

[0024] Furthermore, the lower bottom pipe 3 is provided with an inclined guide groove 51, and a through hole 50 is opened at the connection between the inclined guide groove 51 and the main pipe 1. The outer wall of the adjusting component 42 extends to both sides to form a second blocking plate 43, and the second blocking plate 43 is used to block the through hole 50. The top of the adjusting component 42 extends upward to form a symmetrical limiting rod 44, and the limiting rod 44 is movably disposed in the limiting groove 45.

[0025] Preferably, the adjusting rod 7 can also be replaced by a drive motor, which is set to start intermittently to drive the adjusting member 42 to rotate.

[0026] The working principle and beneficial effects of the above scheme are as follows: Oil enters the upper chamber 2 through inlet 4 and is filtered by filter screen 8, thus filtering out impurities and ensuring high-quality oil at the wellhead. The filtered oil then falls onto the anti-erosion buffer 38, reducing its impact. Based on this, the drive motor 49 is activated, driving the drive screw 46 to rotate. Since the anti-erosion buffer 38 is threadedly connected to the drive screw 46 and restricted by the limiting rod 44, it can move up and down along the outer wall of the drive screw 46. When the anti-erosion buffer 38 moves upward until the first adjusting protrusion 39 and the arc-shaped protrusion 9 are on the same horizontal line, the main pipeline 1 is divided into two non-connected sealed cavities. At this time, the oil falls onto the anti-erosion buffer 38, reducing its impact, and simultaneously... Oil accumulates in the sealed cavity. As the anti-erosion buffer 38 continues to rise, an "S"-shaped oil channel is formed between the arc-shaped concave 41 and the arc-shaped protruding section 9. The oil accumulated in the upper sealed cavity will flow into the lower sealed cavity along the "S"-shaped oil channel. Since the second blocking plate 43 blocks the through hole 50 at this time, the lower sealed cavity will accumulate oil that has been buffered and fallen along the "S"-shaped oil channel. As the anti-erosion buffer 38 continues to rise until the second adjusting protrusion 40 and the arc-shaped protruding section 9 are on the same horizontal line, the upper and lower sealed cavities are no longer connected. The upper sealed cavity will accumulate oil again. At the same time, the adjusting rod 7 drives the adjusting member 42 to rotate. When the adjusting member 42 rotates, the two sets of blocking plates 43 no longer block the through hole 50, so that the oil accumulated in the lower sealed cavity flows into the inclined guide groove 51 and is discharged from the outlet 6.

[0027] When the anti-erosion buffer 38 descends, the oil will repeat the above flow path. Through the reciprocating up and down movement of the anti-erosion buffer 38, the vertically falling oil with impact force can be buffered, thereby achieving the effect of anti-impact and increasing the service life of the wellhead equipment.

[0028] The area of ​​the two sets of blocking plates 43 blocking the through hole 50 can be adjusted by adjusting rod 7, thereby further controlling the flow rate of oil and further reducing the impact force of oil.

[0029] Example 2: Based on Example 1, please refer to... Figures 1-4 The intermittent cleaning component 10 includes a sealing housing 12, which is fixedly connected to several sets of support pipes 13. The sealing housing 12 is connected to the spray support ring 11 through several sets of support pipes 13. The outer wall of the sealing housing 12 is provided with a docking hole 18, which is connected to the cleaning interface 5.

[0030] Furthermore, the flow distribution pipe 21 is fixedly installed at the bottom of the inner wall of the sealing housing 12, and the flow distribution pipe 21 is connected to the docking hole 18 through the connecting pipe 2 19. The adjusting plate 24 is fixedly connected to the inner wall of the flow distribution pipe 21, and two sets of through slots are symmetrically opened on the adjusting plate 24. The dividing plate 25 is installed between the adjusting plate 24 and the inner wall of the flow distribution pipe 21, and a one-way valve 26 is installed on the dividing plate 25. One end of the second connecting rod 22 is rotatably connected to the inner wall of the flow distribution pipe 21, and the other end of the second connecting rod 22 is rotatably connected to the adjusting plate 24. The first blocking plate 23 is fixedly connected to the second connecting rod 22, and the first blocking plate 23 is in contact with the bottom of the adjusting plate 24. The impeller 20 is sleeved on the outer wall of the second connecting rod 22.

[0031] Furthermore, the liquid storage shell 27 is fixedly connected to the inner wall of the sealing shell 12, the bottom of the liquid storage shell 27 is connected to the flow distribution pipe 21, the piston 28 is movably disposed inside the liquid storage shell 27, the bottom of the rack 31 extends movably into the liquid storage shell 27 and is fixedly connected to the piston 28, the connecting spring 29 is sleeved on the outer wall of the rack 31, and the two ends of the connecting spring 29 are fixedly connected to the inner wall of the liquid storage shell 27 and the piston 28 respectively.

[0032] Furthermore, the support rod 30 is fixedly connected to the liquid storage shell 27, the third connecting rod 33 is rotatably connected to the support rod 30, and a drive gear 32 is fixedly sleeved on one end of the third connecting rod 33, and a bevel gear 34 is fixedly sleeved on the other end of the third connecting rod 33. The drive gear 32 meshes with the rack 31.

[0033] Furthermore, the first connecting rod 15 is movably connected to the filter screen 8, and a brush 16 is fixedly provided at one end of the first connecting rod 15. The other end of the first connecting rod 15 movably passes through the hollow disc 36 and extends into the sealed housing 12. A bevel gear 35 is fixedly provided at one end of the first connecting rod 15 that extends into the sealed housing 12. The first bevel gear 34 and the second bevel gear 35 mesh with each other. The hollow disc 36 is fixedly provided on the top of the sealed housing 12, and an oblique nozzle 37 is provided on the top of the hollow disc 36. The hollow disc 36 is connected to the flow distribution pipe 21 through the connecting pipe 17.

[0034] Preferably, one side of the outer wall of the upper housing 2 is provided with an openable slag outlet for discharging impurities accumulated on the filter screen 8.

[0035] The working principle and beneficial effects of the above scheme are as follows: During use, the cleaning liquid is pumped into the flow distribution pipe 21 through the docking hole 18 and the connecting pipe 2 19 by the external liquid pump of the cleaning interface 5. At the same time, the impact force of the water flow acts on the impeller 20, thereby driving the second connecting rod 22 to rotate. When the second connecting rod 22 rotates, it will drive the first blocking plate 23 to rotate. During this process, when the first blocking plate 23 is on the right side, it will block the through groove on the right side of the adjusting plate 24. A part of the cleaning liquid enters the liquid storage shell 27 from the through groove on the left side of the adjusting plate 24 and pushes the piston 28 to move upward. This will compress the connecting spring 29 and push the rack 31 to move. Thus, the third connecting rod 33 can be driven to rotate through the drive gear 32. Then, the third connecting rod 33 drives the first connecting rod 15 to rotate through the first bevel gear 34 and the second bevel gear 35. When the first connecting rod 15 rotates, it can drive the brush 16 to clean the filter screen 8.

[0036] At the same time, another part of the cleaning fluid will pass through the one-way valve 26, through the dividing plate 25, and through the connecting pipe 17 into the hollow plate 36. It will then be concentrated by the inclined nozzle 37 to impact and clean the inner ring of the filter screen 8, while the brush 16 can unclog the filter screen 8.

[0037] Meanwhile, since the second connecting rod 22 is continuously rotating, when the blocking plate 23 rotates to the left, it will block the channel on the left side of the adjusting plate 24. All the cleaning fluid entering the flow distribution pipe 21 will be blocked by the one-way valve 26 on the dividing plate 25, and thus directly enter the hollow plate 36 from the connecting pipe 17. Since the cleaning fluid will not enter the liquid storage shell 27 at this time, the piston 28 will be pushed and reset by the connecting spring 29. At this time, the transmission will cause the first connecting rod 15 to reverse, which will cause the brush 16 to rotate in the opposite direction to form an intermittent cleaning action. Furthermore, the cleaning fluid squeezed out from the liquid storage shell 27 will return to the flow distribution pipe 21. Since the channel on the right side of the adjusting plate 24 is blocked by the blocking plate 23, this part of the liquid will enter the hollow plate 36 through the one-way valve 26 along the connecting pipe 17. Therefore, the pressure of the cleaning fluid sprayed from the inclined nozzle 37 will also be greater than before (before, when the channel on the right side was blocked), thus increasing the flushing force on the filter screen 8.

[0038] At the same time, some cleaning fluid will enter the housing of the sealing housing 12 through the docking hole 18 and enter the spray support ring 11 along several sets of support pipes 13. Then, it will be flushed towards the outside of the filter screen 8 through several spray holes 14, so that the brush 16 can unclog the filter screen 8.

[0039] In summary, while the impact force of the water flow drives the blockage plate 23 to rotate, a series of transmissions can change the rotation direction of the brush 16. Furthermore, the impact force of the cleaning liquid on the filter screen 8 can be changed simultaneously, thereby clearing the filter screen 8 and discharging the impurities accumulated on the filter screen 8 from the slag outlet.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A erosion-resistant and corrosion-resistant fracturing wellhead device, characterized in that, It includes a main pipe (1), an upper box (2) and a lower bottom pipe (3). The upper box (2) is installed at one end of the main pipe (1), and the lower bottom pipe (3) is installed at the other end of the main pipe (1). A cleaning interface (5) is provided on the outer wall of the main pipe (1). A filter screen (8) and an intermittent cleaning component (10) are provided inside the upper box (2). An outlet (6) is provided on the outer wall of the lower bottom pipe (3). An arc-shaped protruding section (9) is provided on the inner wall of the main pipe (1). An anti-erosion buffer (38) is installed inside the main pipe (1). An adjusting rod (7) extends into the lower bottom pipe (3).

2. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 1, characterized in that, The upper housing (2) is fixedly provided with a spray support ring (11). The intermittent cleaning component (10) is connected to the spray support ring (11) through several sets of support pipes (13). Several spray holes (14) are opened on the outer wall of the spray support ring (11).

3. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 2, characterized in that, The intermittent cleaning component (10) includes a sealing housing (12), which is fixedly connected to several sets of support pipes (13). The sealing housing (12) is connected to the spray support ring (11) through several sets of support pipes (13). The outer wall of the sealing housing (12) is provided with a docking hole (18), which is connected to the cleaning interface (5).

4. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 3, characterized in that, The flow distribution pipe (21) is fixedly installed at the bottom of the inner wall of the sealed housing (12), and the flow distribution pipe (21) is connected to the docking hole (18) through the connecting pipe (19). The regulating plate (24) is fixedly connected to the inner wall of the flow distribution pipe (21), and two sets of through slots are symmetrically opened on the regulating plate (24). The dividing plate (25) is installed between the regulating plate (24) and the inner wall of the flow distribution pipe (21), and a one-way valve (26) is installed on the dividing plate (25). One end of the second connecting rod (22) is rotatably connected to the inner wall of the flow distribution pipe (21), and the other end of the second connecting rod (22) is rotatably connected to the regulating plate (24). The first blocking plate (23) is fixedly connected to the second connecting rod (22), and the first blocking plate (23) is in contact with the bottom of the regulating plate (24). The impeller (20) is sleeved on the outer wall of the second connecting rod (22).

5. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 4, characterized in that, The liquid storage shell (27) is fixedly connected to the inner wall of the sealing shell (12). The bottom of the liquid storage shell (27) is connected to the flow distribution pipe (21). The piston (28) is movably located inside the liquid storage shell (27). The bottom of the rack (31) extends movably into the liquid storage shell (27) and is fixedly connected to the piston (28). The connecting spring (29) is sleeved on the outer wall of the rack (31), and the two ends of the connecting spring (29) are fixedly connected to the inner wall of the liquid storage shell (27) and the piston (28) respectively.

6. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 5, characterized in that, The support rod (30) is fixedly connected to the liquid storage shell (27), the third link (33) is rotatably connected to the support rod (30), and a drive gear (32) is fixedly sleeved on one end of the third link (33), and a bevel gear (34) is fixedly sleeved on the other end of the third link (33). The drive gear (32) meshes with the rack (31).

7. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 6, characterized in that, The first connecting rod (15) is movably connected to the filter screen (8), and a brush (16) is fixedly provided at one end of the first connecting rod (15). The other end of the first connecting rod (15) movably passes through the hollow disc (36) and extends into the sealed housing (12). A bevel gear (35) is fixedly provided at one end of the first connecting rod (15) extending into the sealed housing (12). The bevel gear (34) and the bevel gear (35) mesh with each other. The hollow disc (36) is fixedly provided on the top of the sealed housing (12), and an oblique nozzle (37) is provided on the top of the hollow disc (36). The hollow disc (36) is connected to the flow distribution pipe (21) through the connecting pipe (17).

8. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 1, characterized in that, The anti-erosion buffer (38) extends inward in the middle to form an arc-shaped concave (41), thereby dividing the outer wall of the anti-erosion buffer (38) into a first adjustment protrusion (39) and a second adjustment protrusion (40). The anti-erosion buffer (38) is provided with a limiting groove (45). The drive screw (46) is connected to the anti-erosion buffer (38) by a thread.

9. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 8, characterized in that, The drive motor (49) is embedded in the housing of the lower tube (3). The output shaft of the drive motor (49) is fixedly connected to the drive screw (46). The adjusting part (42) is movably sleeved on the outer wall of the drive screw (46). The bevel gear three (47) is fixedly sleeved on the outer wall of the adjusting part (42). The end of the adjusting rod (7) extending into the lower tube (3) is fixedly sleeved with the bevel gear four (48). The bevel gear three (47) and the bevel gear four (48) mesh with each other.

10. The anti-erosion and anti-corrosion fracturing wellhead device according to claim 9, characterized in that, The bottom pipe (3) is provided with an inclined guide groove (51), and a through hole (50) is provided at the connection between the inclined guide groove (51) and the main pipe (1). The outer wall of the adjusting component (42) extends to both sides to form a second blocking plate (43), and the second blocking plate (43) is used to block the through hole (50). The top of the adjusting component (42) extends upward to form a symmetrical limiting rod (44), and the limiting rod (44) is movably located in the limiting groove (45).

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