Ultrahigh-pressure sand prevention flat valve

Abstract

The ultrahigh-pressure sand prevention flat valve comprises a valve body, a valve plate and a valve rod fixedly connected to the top end of the valve plate, the left side and the right side of the valve body are fixedly connected with an input pipe and an output pipe which are communicated with an inner cavity of the valve body respectively, and the bottom end of the valve body is fixedly connected with a discharging pipe; when the filter screen is used for filtering, the filter screen can slide rightwards along with the increase of the filtering duration and the increase of the gravel enrichment amount, the load borne by the filter screen is reduced through compression receding of a first spring, and when cleaning is needed, the filter screen can be automatically flushed and reset only by rotating a valve plate to a closed position; and gravel is discharged through the discharging pipe, when the valve body is opened next time, the valve body is rotated reversely, at the moment, the lifting set can drive the sealing plate to reset, the sand discharging work is completed, and the stability of follow-up work of the valve body can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of flat plate valves, in particular to an ultra-high pressure sand prevention flat plate valve. Background Art

[0002] Anti-sand flat valves are often used to connect deep well pipelines and wellheads; to filter some of the sand and gravel suspended in the collected fluid; to prevent the sand and gravel from scratching or clogging the transport pipe and its sealing gasket.

[0003] Traditional anti-sand flat valves integrate filtering components, such as filter plates, sand collecting funnels, etc. These filtering components can intercept impurities such as sand particles during the flow of the medium to prevent them from entering the valve. The filtered impurities can be collected and processed by a specific cleaning mechanism.

[0004] However, under ultra-high pressure conditions, high pressure will cause complex cleaning components to deform and fail, especially thin-walled components or components with complex movement characteristics. Secondly, when sand and gravel accumulate on the surface of the filter component, the sand and gravel are often not cleaned in time, causing the surface pressure of the filter component to increase and deform, while reducing the transmission efficiency. Summary of the invention

[0005] The object of the present invention is to provide an ultra-high pressure sand control flat valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultra-high pressure sand control flat valve, comprising a valve body, a valve plate and a valve stem fixedly connected to the top of the valve plate, the left and right sides of the valve body are respectively fixedly connected with an input pipe and an output pipe connected with the inner cavity of the valve body, the bottom end of the valve body is fixedly connected with a discharge pipe, the discharge pipe is connected with the inner cavity of the valve body, a baffle is arranged inside the discharge pipe, a filter is arranged inside the through hole of the valve plate, a baffle ring is arranged outside the filter, the baffle ring is slidably connected to the through hole in the left and right directions, and the baffle ring A plurality of first springs are fixedly connected between the right side wall and the inner wall of the through hole, a cavity is provided at the bottom of the valve plate, a liquid inlet hole is provided on the right side wall of the valve plate, the liquid inlet hole is communicated with the cavity, an extrusion plate is slidably connected inside the cavity, the bottom wall of the extrusion plate is fixedly connected to the top of the baffle, sealing plates are slidably connected to the two side walls of the valve plate near the bottom, both sealing plates are fixedly connected to the top of the baffle, a fixed tube is provided inside the cavity, the right end of the fixed tube extends to the outside of the cavity, and a flushing tube is provided inside the fixed tube;

[0007] A lifting group is arranged above the two sealing plates, and the lifting group is used to drive the two sealing plates to rise or fall along the valve plate when the valve plate rotates.

[0008] As a further solution of the present invention, a gear ring is provided on the right side of the valve plate, and the gear ring is fixedly connected to the outside of the fixed tube, and the fixed tube is rotatably connected to the inner wall of the valve plate, and a rack rod is meshed with one side of the gear ring, and the rack rod is slidably connected to the inner wall of the sealing plate below in the vertical direction, and a third spring is fixedly connected between the rack rod and the inner wall of the sealing plate.

[0009] As a further solution of the present invention, the flushing tube is slidingly connected to the inside of the fixed tube, a fourth spring is fixedly connected between the flushing tube and the fixed tube, a push rod is provided on the right side of the flushing tube, the push rod is rotatably connected to the right side wall of the valve plate, and during the rising process of the sealing plate, the side wall of the sealing plate will push the push rod to rotate, and a first torsion spring is sleeved on the rotating shaft of the push rod.

[0010] As a further solution of the present invention, blocking plates are provided on both the front and rear sides of the blocking ring, and the blocking plates are slidably connected to the valve plate in the front and rear directions. The two blocking plates are inclined, and a second spring is fixedly connected between the two blocking plates and the inner wall of the valve plate.

[0011] As a further solution of the present invention, a reset rod is arranged on the right side of the retaining ring, and the reset rod can move with the retaining ring and can be pushed by the flushing pipe.

[0012] As a further solution of the present invention, the left end of the reset rod is fixedly connected to a first positioning block, the first positioning block is located near the bottom of the retaining ring, the first positioning block is slidably connected to the inner wall of the retaining ring, a fifth spring is fixedly connected between the first positioning block and the inner wall of the retaining ring, the filter is rotatably connected to the retaining ring, a second torsion spring is sleeved on the rotating shaft of the filter, and a second positioning block is fixedly connected to the left side wall of the retaining ring near the top.

[0013] As a further solution of the present invention, two contact rods are fixedly connected to the fixed tube, and the side walls of the two contact rods are both provided with inclined surfaces. Two compression rods are slidably connected to the side wall of the flushing tube. A nozzle is fixedly connected to the left side wall of the flushing tube, and a rubber tube is glued between the nozzle and the flushing tube. The two compression rods are used to compress the rubber tube, and a seventh spring is fixedly connected between the two compression rods and the inner wall of the flushing tube.

[0014] As a further solution of the present invention, the pulling group includes two rollers, two pull ropes and a sixth spring. The two rollers are rotatably connected to the two side walls of the valve plate. The bottom ends of the two pull ropes are fixedly connected to the top ends of the two sealing plates. The top ends of the two pull ropes are both wrapped around the rotating shafts of the two rollers. During the rotation of the valve plate, the rollers will contact the bottom wall of the valve cover and rotate. The sixth spring is fixedly connected between the extrusion plate and the inner top wall of the cavity.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the filter screen is filtering, as the filtering time increases and the amount of gravel enrichment increases, the filter screen can slide to the right, and the load on the filter screen is reduced by compressing the first spring to make way. When cleaning is needed, the filter screen can be automatically flushed and reset by rotating the valve plate to the closed position, and the gravel can be discharged through the discharge pipe. When it is opened next time, it can be rotated in the opposite direction. At this time, the lifting group will drive the sealing plate to reset, and the sand discharge work has been completed, so that the stability of the subsequent work of the valve body can be guaranteed. The operation is convenient and there is no need to disassemble the valve body. The rapid sand discharge can be completed by the rapid rotation of the valve plate.

[0017] 2. When the valve plate initially rotates, the valve plate will gradually tilt. At this time, the flushing surface of the sewage output by the input pipe will be inclined relative to the filter, thereby flushing the gravel, assisting the separation of the gravel on the left side of the filter from the filter when it is enriched, and assisting the subsequent flushing pipe to flush and separate the gravel. In the process of the flushing pipe pushing the reset rod to move, the reset rod will first drive the first positioning block to slide along the retaining ring and compress the fifth spring. At this time, the first positioning block will push the filter to rotate slightly when moving to the left, so that the filter can be in a tilted state, so that the flowing sewage can flush the surface of the filter at an angle relative to the filter. In addition, the change in the angle of the filter when the valve plate rotates can further improve the cleaning effect of the gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the valve body of the present invention;

[0020] Figure 3 Schematic diagram of the internal structure of the valve plate of the present invention;

[0021] Figure 4 It is a schematic diagram of the positional relationship between the retaining ring, the reset rod and the retaining plate of the present invention;

[0022] Figure 5 It is a schematic diagram of the positional relationship between the flushing pipe of the present invention and the push rod when the flushing pipe is in a vertical state;

[0023] Figure 6 It is a schematic diagram of the positional relationship between the compression rod, the flushing pipe and the seventh spring of the present invention;

[0024] Figure 7 It is a schematic diagram of the positional relationship between the roller and the pull rope and between the sealing plate and the third spring of the present invention;

[0025] Figure 8It is a schematic diagram of the positional relationship among the fifth spring, the first positioning block and the second torsion spring of the present invention.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Valve body; 2. Valve plate; 3. Input pipe; 4. Output pipe; 5. Discharge pipe; 6. Baffle; 7. Filter; 8. Baffle ring; 9. First spring; 10. Cavity; 11. Liquid inlet hole; 12. Extrusion plate; 13. Sealing plate; 14. Fixed pipe; 15. Flushing pipe; 16. Baffle; 17. Second spring; 18. Gear ring; 19. Rack rod; 20. Third spring; 21. Push rod; 22. Fourth spring; 23. First torsion spring; 24. Reset rod; 25. First positioning block; 26. Fifth spring; 27. Second torsion spring; 28. Second positioning block; 29. ​​Roller; 30. Pull rope; 31. Sixth spring; 32. Contact rod; 33. Compression rod; 34. Sprinkler; 35. Rubber tube; 36. Seventh spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 8 The present invention provides a technical solution: an ultra-high pressure sand control flat valve, comprising a valve body 1, a valve plate 2 and a valve stem fixedly connected to the top of the valve plate 2, the left and right sides of the valve body 1 are respectively fixedly connected with an input pipe 3 and an output pipe 4 connected with the inner cavity of the valve body 1, a discharge pipe 5 is fixedly connected to the bottom end of the valve body 1, the discharge pipe 5 is connected with the inner cavity of the valve body 1, a baffle 6 is arranged inside the discharge pipe 5, a filter screen 7 is arranged inside the through hole of the valve plate 2, a baffle ring 8 is arranged outside the filter screen 7, the baffle ring 8 is slidably connected to the through hole in the left and right directions, and a right side wall of the baffle ring 8 is connected to the inner wall of the through hole. A plurality of first springs 9 are fixedly connected, a cavity 10 is provided at the bottom of the valve plate 2, a liquid inlet hole 11 is provided on the right side wall of the valve plate 2, the liquid inlet hole 11 is communicated with the cavity 10, an extrusion plate 12 is slidably connected inside the cavity 10, the bottom wall of the extrusion plate 12 is fixedly connected to the top of the baffle 6, sealing plates 13 are slidably connected to the two side walls of the valve plate 2 near the bottom, the two sealing plates 13 are fixedly connected to the top of the baffle 6, a fixed tube 14 is provided inside the cavity 10, the right end of the fixed tube 14 extends to the outside of the cavity 10, and a flushing tube 15 is provided inside the fixed tube 14;

[0030] A lifting group is arranged above the two sealing plates 13 , and the lifting group is used to drive the two sealing plates 13 to rise or fall along the valve plate 2 when the valve plate 2 rotates.

[0031] like Figure 1-Figure 3 As shown:

[0032] When in use, the baffle 6 blocks the discharge pipe 5. At this time, the input pipe 3 is connected with the output pipe 4. The transported medium (generally sewage or oil in oil field exploitation, but mostly sewage, taking sewage as an example) flows from the input pipe 3 through the inner cavity of the valve body 1 and the through hole on the valve plate 2 to the output pipe 4 on the right side. When flowing, the sewage will be filtered by the filter screen 7, so that the gravel contained in it is blocked by the filter screen 7 on the left side of the filter screen 7, while the right side of the valve plate 2 is clean water, and the clean water will enter the cavity 10 through the liquid inlet hole 11 and The entire cavity 10 is filled, and as the sewage is transported for a long time, the gravel blocked by the filter screen 7 will gradually enrich on the surface of the filter screen 7. At this time, the resistance encountered by the filter screen 7 during filtration will become larger, and the filter screen 7 will drive the retaining ring 8 to gradually slide to the right inside the through hole and compress the first spring 9 to buffer the resistance encountered by the filter screen 7 and protect the filter screen 7. After the filter screen 7 has been working for a long time or has completed its work, the valve plate 2 can be driven to rotate through the valve stem (the rotation of the valve stem can be done mechanically or manually);

[0033] At this time, the valve plate 2 will rotate inside the valve body 1. During the rotation of the valve plate 2, the lifting group will follow the rotation of the valve plate 2 to drive the sealing plate 13, the baffle 6 and the extrusion plate 12 to rise. At this time, the baffle 6 will rise inside the discharge pipe 5 and gradually open the discharge pipe 5, and a part of the sewage containing sand and gravel will flow into the discharge pipe 5. As the rotation angle of the valve plate 2 increases, the distance between the baffle 6 and the discharge pipe 5 will gradually increase. When the extrusion plate 12 rises inside the cavity 10, the sealing plate 13 will move toward the liquid inlet hole 11. At this time, a small amount of water inside the cavity 10 will be squeezed out by the extrusion plate 12. When the sealing plate 13 is close to the liquid inlet hole, the sealing plate 13 will move toward the liquid inlet hole 11. After the valve plate 2 is closed, the extrusion plate 12 continues to slide inside the cavity 10, and the clean water (without gravel) inside the cavity 10 is squeezed toward the filter screen 7 through the fixed pipe 14 and the flushing pipe 15, and then the water flushed out through the flushing pipe 15 gradually flushes the gravel enriched on the filter screen 7 from one side. After the valve plate 2 rotates to 90 degrees, the valve plate 2 closes the input pipe 3 and the output pipe 4. At this time, the impurities on the filter screen 7 are also flushed down by the water discharged from the flushing pipe 15, and then the first spring 9 is reset to drive the filter screen 7 to reset and push out the gravel on the left side of the filter screen 7 inside the through hole, so that the gravel can be discharged through the climbing discharge pipe 5;

[0034] There are two processes for the first spring 9 to drive the filter screen 7 to reset. One is that when there is more sand and gravel on the left side of the filter screen 7 and the water pressure is relatively high, the tendency of the filter screen 7 to reset to the left will be blocked by more sand and gravel. At this time, the filter screen 7 may stay on the right side, and wait until the flushing pipe 15 flushes the sand and gravel on the filter screen 7 down, and the filter screen 7 is auxiliary reset under the impetus of the flushing force of the flushing pipe 15. The auxiliary driving force is suitable for the case where there are more sand and gravel on the surface of the filter screen 7 and on the left side of the filter screen 7. The other is when there is not too much sand and gravel on the left side of the filter screen 7 but it is pushed to the right by the water pressure and stays on the right side. At this time, the flushing of the flushing pipe 15 may not directly push the filter screen 7 to move and make the sand and gravel on the left side of the filter screen 7 separate from the filter screen 7. However, during the rotation of the valve plate 2 and the opening of the baffle 6, the water pressure will gradually decrease, so the filter screen 7 will be flushed by the flushing pipe 15 a little later, and the filter screen 7 can be reset after the sand and gravel are separated.

[0035] Moreover, when the valve plate 2 initially rotates, the valve plate 2 will gradually tilt, and at this time, the flushing surface of the sewage output by the input pipe 3 will tilt relative to the filter screen 7, thereby flushing the gravel, assisting the gravel on the left side of the filter screen 7 to separate from the filter screen 7 when it is enriched, and assisting the subsequent flushing pipe 15 to flush and separate the gravel;

[0036] When the filter screen 7 of the present invention is filtering, as the filtering time increases and the amount of gravel enrichment increases, the filter screen can slide to the right, and the load on the filter screen 7 is reduced by compressing the first spring 9 to make way. When cleaning is needed, the filter screen can be automatically flushed and reset by rotating the valve plate 2 to the closed position, and the gravel can be discharged through the discharge pipe 5. After the valve plate 2 closes the input pipe 3 and the output pipe 4, it can be rotated in the opposite direction when it is opened next time. At this time, the lifting group will drive the sealing plate 13 to reset, and the sand discharge work has been completed, so that the stability of the subsequent work of the valve body 1 can be guaranteed, and the operation is convenient without disassembling the valve body 1. The rapid rotation of the valve plate 2 can complete the rapid sand discharge.

[0037] A gear ring 18 is provided on the right side of the valve plate 2, and the gear ring 18 is fixedly connected to the outside of the fixed tube 14. The fixed tube 14 is rotatably connected to the inner wall of the valve plate 2. A rack rod 19 is meshed with one side of the gear ring 18. The rack rod 19 is slidably connected to the inner wall of the sealing plate 13 below in the vertical direction, and a third spring 20 is fixedly connected between the rack rod 19 and the inner wall of the sealing plate 13.

[0038] like Figure 2 , Figure 3 , Figure 5-Figure 7 As shown:

[0039] When the valve plate 2 is in working state (i.e. when the input pipe 3 flows the sewage to the output pipe 4), the flushing pipe 15 is not in a vertical state, but in a horizontal state in the front-to-back direction. When the valve plate 2 is closed and rotated (i.e. when cleaning is required), the lifting group will drive the sealing plate 13, the baffle 6 and the extrusion plate 12 to rise. At this time, the sealing plate 13 will drive the rack rod 19 to rise. The rack rod 19 will engage with the gear ring 18 to drive the gear ring 18, the fixed pipe 14 and the flushing pipe 15 to rotate. At this time, the flushing pipe 15 will change from a horizontal state to a vertical state, and then the sealing plate 13 will continue to rise. The top of the rack rod 19 will be contacted by the protrusion on the side wall of the valve plate 2 (the protrusion only limits the rising distance of the rack rod 19, which is not specifically shown in the figure, and the maximum rotation angle of the fixed tube 14 is set to 90 degrees) and cannot move further. At this time, the flushing tube 15 will stop in a vertical state. At this time, the sealing plate 13 also blocks the liquid inlet 11. Then, when the sealing plate 13 continues to rise, the squeezing plate 12 will gradually discharge the clean water in the cavity 10 to the filter screen 7 through the flushing tube 15. In this process, the rack rod 19 cannot move further and the third spring 20 will continue to be compressed.

[0040] When the valve plate 2 rotates from the closed state to the open state, the lifting group causes the sealing plate 13 to descend, and the third spring 20 is also gradually released elastically.

[0041] The flushing tube 15 is slidably connected to the inside of the fixed tube 14, and a fourth spring 22 is fixedly connected between the flushing tube 15 and the fixed tube 14. A push rod 21 is provided on the right side of the flushing tube 15, and the push rod 21 is rotatably connected to the right side wall of the valve plate 2. During the rising process of the sealing plate 13, its side wall will push the push rod 21 to rotate, and a first torsion spring 23 is sleeved on the rotating shaft of the push rod 21.

[0042] like Figure 2 , Figure 3 as well as Figure 5-Figure 7 As shown:

[0043] When the lifting group drives the sealing plate 13 to rise, after the liquid inlet 11 is blocked and the flushing tube 15 rotates from a horizontal state to a vertical state, the side wall of the sealing plate 13 will contact the inclined bottom end of the push rod 21 and will push the push rod 21 to rotate around the rotation axis. At this time, the first torsion spring 23 will be gradually compressed, and the top end of the push rod 21 will swing from the right side of the flushing tube 15 to the left, which will push the flushing tube 15 to interact along the fixed tube 14 and compress the fourth spring 22. Then, when flushing the filter 7, it will have a tendency to approach the filter 7, thereby increasing the flushing force and facilitating the separation of the sand and gravel from the filter 7. At this time, no matter the filter 7 is located near the left or right side of the through hole, it will be subject to a greater flushing force.

[0044] Blocking plates 16 are provided on both the front and rear sides of the blocking ring 8. The blocking plates 16 are slidably connected to the valve plate 2 in the front and rear directions. The two blocking plates 16 are inclined. A second spring 17 is fixedly connected between the two blocking plates 16 and the inner wall of the valve plate 2.

[0045] like Figure 3 and Figure 4 As shown:

[0046] When the filter screen 7 is filtering, as the filter screen 7 and the retaining ring 8 slide to the right, the first spring 9 will be gradually compressed, and when the retaining ring 8 slides, the two blocking sheets 16 will be gradually compressed to increase the resistance of the filter screen 7 during movement to better filter.

[0047] A reset rod 24 is provided on the right side of the retaining ring 8 . The reset rod 24 can move with the retaining ring 8 and can be pushed by the flushing pipe 15 .

[0048] The left end of the reset rod 24 is fixedly connected with a first positioning block 25, and the first positioning block 25 is located near the bottom of the retaining ring 8. The first positioning block 25 is slidably connected to the inner wall of the retaining ring 8, and a fifth spring 26 is fixedly connected between the first positioning block 25 and the inner wall of the retaining ring 8. The filter screen 7 is rotatably connected to the retaining ring 8, and a second torsion spring 27 is sleeved on the rotating axis of the filter screen 7. A second positioning block 28 is fixedly connected to the left side wall of the retaining ring 8 near the top.

[0049] like Figure 3 , Figure 4 as well as Figure 8 As shown:

[0050] When the retaining ring 8 moves to the right, the retaining ring 8 will drive the first positioning block 25 and the second positioning block 28 to move synchronously, and at this time, the reset rod 24 will be driven to the right. When the filter screen 7 stops at a certain position, the distance that the reset rod 24 protrudes to the right relative to the through hole will also be fixed. When the side wall of the sealing plate 13 pushes the push rod 21 to rotate, the push rod 21 will drive the flushing pipe 15 to move to the left. When the flushing pipe 15 moves to the left and contacts with the reset rod 24, it will push the reset rod 24 to move, and then drive the retaining ring 8 and the filter screen 7 to move to the left through the first positioning block 25 and the fifth spring 26. At this time, the flushing pipe 15 will still flush the filter screen 7, but it can facilitate the reset of the filter screen 7, avoiding the situation where there is too much sand and gravel accumulated on the left side of the filter screen 7 and it cannot be reset smoothly.

[0051] Moreover, the first positioning block 25, the second torsion spring 27 and the second positioning block 28 can limit the rotation of the filter 7 to a certain extent, so as to avoid direct rotation of the filter 7 during filtering operation. In the process of the flushing tube 15 pushing the reset rod 24 to move, the reset rod 24 will first drive the first positioning block 25 to slide along the retaining ring 8 and compress the fifth spring 26. At this time, the first positioning block 25 will push the filter 7 to rotate slightly when moving to the left, so that the filter 7 can be in a tilted state, so that the flowing sewage can flush the surface of the filter 7 at an angle relative to the filter 7. In addition, the change in the angle of the filter 7 when the valve plate 2 rotates can improve the cleaning effect of the gravel.

[0052] Two contact rods 32 are fixedly connected to the fixed tube 14, and the side walls of the two contact rods 32 are both provided with inclined surfaces. Two compression rods 33 are slidably connected to the side wall of the flushing tube 15. A nozzle 34 is fixedly connected to the left side wall of the flushing tube 15, and a rubber tube 35 is glued between the nozzle 34 and the flushing tube 15. The two compression rods 33 are used to compress the rubber tube 35, and a seventh spring 36 is fixedly connected between the two compression rods 33 and the inner wall of the flushing tube 15.

[0053] like Figure 3 , Figure 5 and Figure 6 As shown:

[0054] When the push rod 21 pushes the flushing tube 15 to slide along the fixed tube 14, the reset rod 24 will be pushed, and the side walls of the two compression rods 33 will keep in contact with the inclined side walls of the contact rod 32 while moving along the side walls of the contact rod 32. At this time, the two compression rods 33 will be gradually squeezed, so that the two compression rods 33 slide along the flushing tube 15 and squeeze the rubber tube 35 to change the opening size of the rubber tube 35. At this time, when the opening is reduced, the pressure of the water discharged from the flushing tube 15 will increase, thereby improving the flushing and cleaning effect of the gravel, and the rubber tube 35 can be supported by the nozzle 34.

[0055] The pulling group includes two rollers 29, two pull ropes 30 and a sixth spring 31. The two rollers 29 are rotatably connected to the two side walls of the valve plate 2. The bottom ends of the two pull ropes 30 are fixedly connected to the top ends of the two sealing plates 13. The top ends of the two pull ropes 30 are both wrapped around the rotating shafts of the two rollers 29. When the valve plate 2 rotates, the rollers 29 will contact the bottom wall of the valve cover and rotate. The sixth spring 31 is fixedly connected between the extrusion plate 12 and the inner top wall of the cavity 10.

[0056] like Figure 2 , Figure 3 and Figure 7 As shown:

[0057] When the valve plate 2 rotates, the roller 29 is driven to rotate, and the roller 29 moves along the bottom wall of the valve cover to reel in the pull rope 30 , which in turn drives the sealing plate 13 to rise, and the sixth spring 31 facilitates the resetting of the sealing plate 13 .

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-high pressure sand control flat valve, comprising a valve body (1), a valve plate (2) and a valve stem fixedly connected to the top of the valve plate (2), wherein the left and right sides of the valve body (1) are respectively fixedly connected with an input pipe (3) and an output pipe (4) communicating with the inner cavity of the valve body (1), and characterized in that: A discharge pipe (5) is fixedly connected to the bottom end of the valve body (1), the discharge pipe (5) is communicated with the inner cavity of the valve body (1), a baffle (6) is arranged inside the discharge pipe (5), a filter screen (7) is arranged inside the through hole of the valve plate (2), a baffle ring (8) is arranged outside the filter screen (7), the baffle ring (8) is slidably connected to the through hole in the left and right directions, a plurality of first springs (9) are fixedly connected between the right side wall of the baffle ring (8) and the inner wall of the through hole, a cavity (10) is opened at the bottom of the valve plate (2), and a liquid inlet hole (11) is opened on the right side wall of the valve plate (2). ), the liquid inlet hole (11) is communicated with the cavity (10), an extrusion plate (12) is slidably connected inside the cavity (10), the bottom wall of the extrusion plate (12) is fixedly connected to the top of the baffle (6), the two side walls of the valve plate (2) are slidably connected to sealing plates (13) near the bottom, the two sealing plates (13) are fixedly connected to the top of the baffle (6), a fixed tube (14) is arranged inside the cavity (10), the right end of the fixed tube (14) extends to the outside of the cavity (10), and a flushing tube (15) is arranged inside the fixed tube (14); A lifting group is arranged above the two sealing plates (13), and the lifting group is used to drive the two sealing plates (13) to rise or fall along the valve plate (2) when the valve plate (2) rotates.

2. The ultra-high pressure sand control flat valve according to claim 1, characterized in that: A gear ring (18) is provided on the right side of the valve plate (2), and the gear ring (18) is fixedly connected to the outside of the fixed tube (14), and the fixed tube (14) is rotatably connected to the inner wall of the valve plate (2). A rack rod (19) is meshed on one side of the gear ring (18), and the rack rod (19) is slidably connected to the inner wall of the sealing plate (13) below in the vertical direction. A third spring (20) is fixedly connected between the rack rod (19) and the inner wall of the sealing plate (13).

3. The ultra-high pressure sand control flat valve according to claim 2, characterized in that: The flushing tube (15) is slidably connected to the inside of the fixed tube (14); a fourth spring (22) is fixedly connected between the flushing tube (15) and the fixed tube (14); a push rod (21) is provided on the right side of the flushing tube (15); the push rod (21) is rotatably connected to the right side wall of the valve plate (2); during the rising process of the sealing plate (13), the side wall thereof will push the push rod (21) to rotate; and a first torsion spring (23) is sleeved on the rotating shaft of the push rod (21).

4. The ultra-high pressure sand control flat valve according to claim 1, characterized in that: Blocking plates (16) are provided on both the front and rear sides of the blocking ring (8), and the blocking plates (16) are slidably connected to the valve plate (2) in the front and rear directions. The two blocking plates (16) are arranged at an angle, and a second spring (17) is fixedly connected between the two blocking plates (16) and the inner wall of the valve plate (2).

5. The ultra-high pressure sand control flat valve according to claim 4, characterized in that: A reset rod (24) is arranged on the right side of the retaining ring (8), and the reset rod (24) can move with the retaining ring (8) and can be pushed by the flushing pipe (15).

6. The ultra-high pressure sand control flat valve according to claim 5, characterized in that: The left end of the reset rod (24) is fixedly connected with a first positioning block (25), the first positioning block (25) is located at a position close to the bottom of the retaining ring (8), the first positioning block (25) is slidably connected to the inner wall of the retaining ring (8), a fifth spring (26) is fixedly connected between the first positioning block (25) and the inner wall of the retaining ring (8), the filter screen (7) is rotatably connected to the retaining ring (8), a second torsion spring (27) is sleeved on the rotating shaft of the filter screen (7), and a second positioning block (28) is fixedly connected to the left side wall of the retaining ring (8) near the top.

7. The ultra-high pressure sand control flat valve according to claim 5, characterized in that: Two contact rods (32) are fixedly connected to the fixed tube (14), and the side walls of the two contact rods (32) are both provided with inclined surfaces. Two compression rods (33) are slidably connected to the side wall of the flushing tube (15). A nozzle (34) is fixedly connected to the left side wall of the flushing tube (15), and a rubber tube (35) is glued between the nozzle (34) and the flushing tube (15). The two compression rods (33) are used to compress the rubber tube (35), and a seventh spring (36) is fixedly connected between the two compression rods (33) and the inner wall of the flushing tube (15).

8. The ultra-high pressure sand control flat valve according to claim 1, characterized in that: The lifting group includes two rollers (29), two pull ropes (30) and a sixth spring (31). The two rollers (29) are rotatably connected to the two side walls of the valve plate (2). The bottom ends of the two pull ropes (30) are fixedly connected to the top ends of the two sealing plates (13). The top ends of the two pull ropes (30) are both wound around the rotating shafts of the two rollers (29). When the valve plate (2) rotates, the rollers (29) contact the bottom wall of the valve cover and rotate. The sixth spring (31) is fixedly connected between the extrusion plate (12) and the inner top wall of the cavity (10).

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