Wellhead valve capable of taking out impurities in pipeline for oil exploitation

Abstract

The invention discloses a wellhead valve capable of taking out impurities in a pipeline for oil exploitation, relates to the field of oil exploitation, and solves the problems that when an existing wellhead valve for oil exploitation is used, the impurities in a filter screen are difficult to be self-cleaned in the process of screening and filtering the impurities in the pipeline, and the service life of equipment is short. Comprising a shell, a filtering mechanism, a cleaning mechanism and a switching mechanism, the side face of the shell communicates with an input pipe and an output pipe, the filtering mechanism comprises a rotating shaft and a filtering plate, multiple sets of screen holes are evenly formed in the filtering plate, and the cleaning mechanism comprises a cleaning rod. Impurities on the two sets of filter plates are synchronously removed through the cleaning rod, when one sides of the filter plates are cleaned through the cleaning rod, the directions of the filter plates are switched through linkage of the switching mechanism, small-particle impurities which are not cleaned in sieve holes are pushed to one side of the output pipe through flowing of petroleum to be discharged, and the self-cleaning function of the filter plates is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil exploitation, in particular to a wellhead valve used for oil exploitation and capable of removing impurities in a pipeline. Background Art

[0002] The valve is a control component in the fluid delivery system. It is a pipeline accessory used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. It has the functions of shutting off, regulating, diverting, preventing backflow, stabilizing pressure, diverting or overflowing pressure relief. The wellhead valve for oil extraction is a valve used to control oil extraction and transportation. There are many varieties and specifications, and the control methods of the valve are diverse. During the use of the wellhead valve, it is easy to be blocked by some continuously accumulated large particles of impurities, resulting in the wellhead valve not being able to work stably.

[0003] The invention patent with the publication number CN113431520B discloses a wellhead valve for removing impurities in a pipeline for oil mining. The filter assembly is arranged on a support block, a water stop assembly is arranged on a support frame, and a scraping assembly is arranged on the support frame. Through the cooperation of a second screw rod with a collecting frame and a device thereon, the second screw rod and the device thereon will move in a direction away from each other. During this process, the push-out frame will push the impurities on the collecting frame to a temporary storage frame, so as to facilitate the subsequent cleaning of the scraped impurities, thereby achieving the effect of automatically collecting the scraped impurities for the subsequent removal of the impurities. Since the first scraping frames on both sides of the device need to be reciprocated to open and close, a part of the impurities remaining on the surface of the filter frame will be pushed to the middle during the reset and closing process, so that the first scraping frames on both sides cannot be completely closed and reset. After long-term use, more and more impurities accumulated in the middle cannot be removed, which affects the use efficiency of the equipment. At the same time, the device cannot automatically remove the impurities remaining inside the filter frame. Long-term use will cause more and more impurities to be blocked in one direction inside the filter frame, affecting the overall flowability of the valve. Summary of the invention

[0004] The purpose of the present invention is to provide a wellhead valve for removing impurities from a pipeline for oil production, which is convenient for improving the efficiency of removing impurities from the pipeline and extending the service life of the equipment, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wellhead valve for oil extraction capable of removing impurities from a pipeline, comprising a shell, a filtering mechanism, a cleaning mechanism and a switching mechanism, wherein the side of the shell is connected to an input pipe and an output pipe, the filtering mechanism comprises a rotating shaft rotatably connected to the inner wall of the shell, the outer wall of the rotating shaft is evenly and fixedly connected to two groups of filter plates, the outer walls of the two groups of filter plates are both slidably fitted with the inner wall of the shell, the filter plates are evenly provided with a plurality of groups of sieve holes for filtering the oil flowing from one side of the input pipe through the sieve holes on the filter plates, and delivering the filtered oil to the output pipe, the cleaning mechanism comprises two groups of filter plates installed on the shell The cleaning rods in the body, the side walls of the two groups of cleaning rods are respectively slidably fitted with the outer walls of the filter plates on both sides, so as to synchronously remove impurities on the two groups of filter plates close to the input pipe through the cleaning rods, and at the same time, the edges of the filter plates can be reinforced and limited when resetting. The switching mechanism is installed in the shell and is used to link the rotating shaft to rotate 180° when the cleaning rods complete cleaning of one side of the filter plates, so that the positions and directions of the two groups of filter plates are switched, and then the uncleaned small particles of impurities in the sieve holes are pushed to the side of the output pipe for discharge through the flow of oil, so as to improve the impurity removal efficiency in the pipeline and extend the service life of the equipment.

[0006] Preferably, the cleaning mechanism also includes a sealing frame fixedly mounted on the side of the cleaning rod, storage boxes are fixedly connected to the upper and lower sides of the shell, a connecting groove connected to the storage box is opened on the shell, and a limit frame is fixedly connected to the side of the sealing frame for reinforcing and limiting the edge position of the filter plate away from the input pipe side, the sealing frame and the limit frame are both slidably connected to the inner wall of the connecting groove along the vertical direction, and a driving member is provided on the shell for synchronously adjusting the movement of the cleaning rods on both sides, so as to facilitate the synchronous removal of impurities of the two groups of filter plates close to the input pipe side by the cleaning rods, and at the same time, the edges of the filter plates can be reinforced and limited when resetting.

[0007] Preferably, the driving member includes a fixed frame fixedly mounted on both sides of the shell, the shell and the fixed frame are respectively provided with guide grooves which are slidably connected to the two groups of cleaning rods in a vertical direction, the two groups of fixed frames are respectively fixedly connected with a guide frame, a guide block is slidably connected in the guide frame in a horizontal direction, two groups of rotating rods which are respectively rotatably connected to one end of the two groups of cleaning rods are rotatably connected to the guide block, and a control member for controlling the sliding state of the guide block according to the opening and closing state of the output tube is provided on the guide frame, so as to facilitate the synchronous adjustment of the movement of the cleaning rods on both sides.

[0008] Preferably, the control member includes a control box fixedly mounted on the output tube, a control shaft is rotatably connected inside the control box, a connecting hole for connecting the shell and the output tube is provided on the control shaft, a knob for controlling the direction of the connecting hole is provided on the control shaft, and a synchronizing member for synchronously adjusting the sliding state of the guide block according to the direction of the connecting hole is provided on the control box, so as to control the sliding state of the guide block according to the opening and closing state of the output tube.

[0009] Preferably, the synchronizing component includes an electric telescopic rod fixedly mounted on a group of the guide frames, the telescopic end of the electric telescopic rod being fixedly connected to a group of guide block sides at a similar distance, a fixing box being fixedly connected to the side of the control box, a control key being slidably connected inside the fixing box, one end of the control key being fixedly connected to a first spring fixedly connected to the fixing box, and the control key being able to drive the electric telescopic rod to perform a reciprocating telescopic operation each time it pops up, so as to synchronously adjust the sliding state of the guide block according to the orientation of the connecting hole.

[0010] Preferably, the switching mechanism includes a tension spring fixedly installed at the bottom of the cleaning rod on the upper side, a lifting frame is slidably connected in the fixed frame in the vertical direction, and multiple groups of first beveled gear blocks are evenly slidably connected in the lifting frame in the horizontal direction, and the side of the first beveled gear block is fixedly connected with a second spring fixedly connected to the lifting frame, the bottom end of the tension spring is fixedly connected to the top surface of the lifting frame, and the outer wall of the rotating shaft is evenly fixedly connected with multiple groups of second beveled gear blocks that can be meshed and driven with the first beveled gear block, so that when the cleaning rod completes cleaning one side of the filter plate, the rotating shaft is linked to rotate 180°, so that the positions and directions of the two groups of filter plates are switched, and then the uncleaned small particles of impurities in the sieve hole are pushed to the side of the output pipe for discharge through the flow of oil.

[0011] Preferably, an installation frame is fixedly connected to the fixed frame, a third bevel gear block capable of unidirectionally engaging with the second bevel gear block is slidably connected to the installation frame, and a third spring fixedly connected to the installation frame is fixedly connected to one side of the third bevel gear block, so as to facilitate limit control of the rotation direction and position of the rotating shaft.

[0012] Preferably, a fourth spring is fixedly connected in the storage box, and one end of the fourth spring is fixedly connected to a push plate capable of pushing the cleaning rod and most of the impurities in the sealing frame into the storage box for storage, and the sides of the two groups of storage boxes are respectively connected to collection pipes, and the side of the shell is fixedly connected to a collection box, and the two groups of collection pipes are connected to the side of the collection box, so as to facilitate unified collection and processing of impurities in the storage boxes.

[0013] Preferably, both ends of the sieve hole are designed with conical openings, so that the opening diameters at both ends are larger than the inner wall diameter in the middle, which is convenient for screening impurities while allowing impurities in the output end of the sieve hole to be pushed out of the sieve hole during the process of fluid passing through the sieve hole.

[0014] Preferably, sealing boxes are fixedly connected to the side surfaces of the two groups of fixing frames respectively, so as to facilitate closing the guide grooves on both sides.

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

[0016] The present invention provides a wellhead valve for oil production and capable of removing impurities from a pipeline, which solves the problem that the existing wellhead valve for oil production is difficult to self-clean the impurities inside the filter screen during the process of screening and filtering the impurities inside the pipeline, and the service life of the equipment is short. The oil flowing in from one side of the input pipe is filtered through the sieve holes on the filter plate, and the filtered oil is transported to the output pipe. The impurities on the side of the two groups of filter plates close to the input pipe are removed synchronously by the cleaning rod. At the same time, the edge of the filter plate can be reinforced and limited by the cleaning mechanism when resetting. When the cleaning rod completes cleaning one side of the filter plate, the switching mechanism is linked to the rotating shaft to rotate 180 degrees, so that the position and direction of the two groups of filter plates are switched. After that, the uncleaned small particle impurities in the sieve holes are pushed to the side of the output pipe for discharge through the flow of oil, so as to realize the self-cleaning function of the filter plate and improve the circulation screening efficiency of long-term use. The device does not need manual control, and can automatically switch the direction of the filter plate and realize self-cleaning of impurities when the valve is closed only by opening and closing the valve. The cleaning is more thorough and efficient, and the clogging of the filter plate is also avoided, thereby extending the service life of the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the local structure of the filtering mechanism of the present invention;

[0019] Figure 3 for Figure 2 A magnified image of area A;

[0020] Figure 4 It is a schematic diagram of the local structure of the control component of the present invention;

[0021] Figure 5 It is a schematic diagram of the partial structure of the cleaning mechanism of the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of area B;

[0023] Figure 7It is a schematic diagram of the local structure of the switching mechanism of the present invention;

[0024] Figure 8 It is a schematic diagram of the local structure of the driving member of the present invention;

[0025] Fig. 9 It is a partial structural sectional view of the cleaning mechanism of the present invention.

[0026] In the figure: 1. shell; 2. input pipe; 3. output pipe; 4. rotating shaft; 5. filter plate; 6. sieve hole; 7. cleaning rod; 8. sealing frame; 9. storage box; 10. connecting groove; 11. limit frame; 12. fixed frame; 13. guide groove; 14. guide frame; 15. guide block; 16. rotating rod; 17. control box; 18. control shaft; 19. connecting hole; 20. knob; 21. electric telescopic rod; 22. fixed box; 23. control key; 24. first spring; 25. tension spring; 26. lifting frame; 27. first oblique tooth block; 28. second spring; 29. ​​second oblique tooth block; 30. installation frame; 31. third oblique tooth block; 32. third spring; 33. fourth spring; 34. push plate; 35. collecting pipe; 36. collecting box; 37. sealing box. DETAILED DESCRIPTION

[0027] 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.

[0028] Example 1: Please refer to Figure 1-Figure 9 The figure shows a wellhead valve for oil extraction and for removing impurities from a pipeline, comprising a housing 1, a filtering mechanism, a cleaning mechanism and a switching mechanism. The side of the housing 1 is connected to an input pipe 2 and an output pipe 3. The filtering mechanism comprises a rotating shaft 4 rotatably connected to the inner wall of the housing 1. Two groups of filter plates 5 are evenly and fixedly connected to the outer wall of the rotating shaft 4. The outer walls of the two groups of filter plates 5 are slidably fitted with the inner wall of the housing 1. A plurality of groups of sieve holes 6 are evenly arranged on the filter plate 5. Both ends of the sieve holes 6 are designed with conical openings, so that the opening apertures at both ends are larger than the inner wall aperture at the middle position, and are used to filter the oil flowing in from one side of the input pipe 2 through the sieve holes 6 on the filter plate 5, and transport the filtered oil to the output pipe 3.

[0029] The cleaning mechanism includes two groups of cleaning rods 7 installed in the shell 1. The side walls of the two groups of cleaning rods 7 are slidably fitted with the outer walls of the filter plates 5 on both sides, respectively, so as to synchronously remove impurities on the two groups of filter plates 5 close to the input pipe 2 through the cleaning rods 7, and at the same time, the edges of the filter plates 5 can be reinforced and limited when resetting. The switching mechanism is installed in the shell 1, and is used to link the rotating shaft 4 to rotate 180° when the cleaning rods 7 complete cleaning of one side of the filter plate 5, so that the positions and directions of the two groups of filter plates 5 are switched, and then the uncleaned small particles of impurities in the sieve holes 6 are pushed to the side of the output pipe 3 for discharge through the flow of oil.

[0030] The cleaning mechanism also includes a sealing frame 8 fixedly installed on the side of the cleaning rod 7, and storage boxes 9 are fixedly connected to the upper and lower sides of the shell 1. A connecting groove 10 connected to the storage box 9 is opened on the shell 1. A limit frame 11 is fixedly connected to the side of the sealing frame 8 for reinforcing and limiting the edge position of the filter plate 5 away from the input pipe 2. The sealing frame 8 and the limit frame 11 are both slidably connected to the inner wall of the connecting groove 10 in the vertical direction. The shell 1 is provided with a driving member for synchronously adjusting the movement of the cleaning rods 7 on both sides.

[0031] The driving member includes a fixed frame 12 fixedly installed on both sides of the shell 1, and guide grooves 13 are respectively provided on the shell 1 and the fixed frame 12, which are slidably connected to the two groups of cleaning rods 7 in the vertical direction. The two groups of fixed frames 12 are respectively fixedly connected with guide frames 14, and guide blocks 15 are slidably connected in the guide frames 14 in the horizontal direction. Two groups of rotating rods 16 are rotatably connected to the guide blocks 15, which are respectively rotatably connected to one end of the two groups of cleaning rods 7. The guide frame 14 is provided with a control member for controlling the sliding state of the guide block 15 according to the opening and closing state of the output tube 3, and the sides of the two groups of fixed frames 12 are respectively fixedly connected with sealing boxes 37.

[0032] The control member includes a control box 17 fixedly mounted on the output pipe 3, a control shaft 18 is rotatably connected inside the control box 17, a connecting hole 19 for connecting the housing 1 and the output pipe 3 is opened on the control shaft 18, a knob 20 for controlling the direction of the connecting hole 19 is provided on the control shaft 18, and a synchronizing member for synchronously adjusting the sliding state of the guide block 15 according to the direction of the connecting hole 19 is provided on the control box 17.

[0033] The synchronizing member includes an electric telescopic rod 21 fixedly mounted on a group of guide frames 14, the telescopic end of the electric telescopic rod 21 is fixedly connected to the side of a group of guide blocks 15 at a similar distance, a fixed box 22 is fixedly connected to the side of the control box 17, a control key 23 is slidably connected inside the fixed box 22, one end of the control key 23 is fixedly connected to a first spring 24 fixedly connected to the fixed box 22, and the control key 23 can drive the electric telescopic rod 21 to perform a reciprocating telescopic operation each time it pops up.

[0034] A fourth spring 33 is fixedly connected inside the storage box 9, and one end of the fourth spring 33 is fixedly connected to a push plate 34 which can push most of the impurities in the cleaning rod 7 and the sealing frame 8 into the storage box 9 for storage. The sides of the two groups of storage boxes 9 are respectively connected to collection tubes 35, and the side of the shell 1 is fixedly connected to a collection box 36. The two groups of collection tubes 35 are connected to the side of the collection box 36.

[0035] In this embodiment, one end of the input pipe 2 is connected and fixed to the oil extraction input end. By turning the knob 20 to adjust the direction of the control shaft 18 and changing the connection state between the connecting hole 19 and the shell 1, the flow rate and output state of the oil output from the output pipe 3 can be changed. When the valve body is in the open state, the oil flows through the shell 1 through the input pipe 2 and is output from the output pipe 3. It is screened by two groups of filter plates 5 inside the shell 1, and large particles of impurities are blocked on the side of the sieve hole 6 close to the input pipe 2, thereby realizing the function of automatic screening.

[0036] When the valve is closed, the connecting hole 19 rotates to the side position, and the outer wall of the control shaft 18 no longer presses the control key 23. The control key 23 is ejected into the connecting hole 19 by the first spring 24. At this time, the electric telescopic rod 21 can be controlled to reciprocate and retract. The electric telescopic rod 21 is pushed out, driving the guide block 15 to slide in the guide frame 14, so that the rotating rods 16 on both sides push the cleaning rod 7 and the sealing frame 8 to slide in the connecting groove 10 together. The cleaning rod 7 pushes the large particles of impurities accumulated on the side of the filter plate 5 close to the input pipe 2 to the storage box 9. Since the edge of the pushing plate 34 is designed with a bevel, when the sealing frame 8 slides into the storage box 9, it will first push the pushing plate 34 to slide and compress the fourth spring 33. After the cleaning rod 7 enters the storage box 9, the pushing plate 34 is ejected under the push of the fourth spring 33, and the impurities between the cleaning rod 7 and the sealing frame 8 are pushed to the collection pipe 35, and transported to the collection box 36 for collection and storage.

[0037] Afterwards, the cleaning rod 7 and the limit frame 11 release the clamping limit on both sides of the filter plate 5, and the rotating shaft 4 can be linked to rotate 180° through the switching mechanism to switch the position and direction of the filter plate 5. The sieve hole 6 on the side that was originally close to the input pipe 2 is rotated to the side close to the output pipe 3. At this time, since the valve is in a closed state, the switching of the filter plate 5 will not cause the flow rate of the internal liquid to change, and will not affect the continued filtering of the oil.

[0038] After the filter plate 5 is switched, the electric telescopic rod 21 starts to pull back, and the guide block 15 slides in the opposite direction to pull the rotating rod 16 and the cleaning rod 7 to move, driving the cleaning rod 7 and the sealing frame 8 to close in the opposite direction to the side of the rotating shaft 4 in the middle. At this time, since the filter plate 5 on the sliding side of the cleaning rod 7 is on the side originally close to the output pipe 3, a large amount of residual impurities will not be pushed to the middle, and the situation of being unable to reset will not occur. When the electric telescopic rod 21 is fully retracted, the cleaning rod 7 is reset, and the sealing frame 8 is sealed against the inner wall of the shell 1 to prevent the oil in the shell 1 from flowing out of the connecting groove 10. At the same time, the sealing frame 8 drives the limit frame 11 to fit and resist the outer wall of the side of the filter plate 5 close to the output pipe 3, so that the edge position of the filter plate 5 is more stable during the filtration process, and it will not bend or rotate.

[0039] It is worth noting that: since the sieve hole 6 is designed with larger openings at both ends and a smaller middle channel, impurities will gradually enter the sieve hole 6 during the inflow process and be blocked on the side close to the input pipe 2, while small particles of oil and fluid can flow out to the side of the output pipe 3 through the sieve hole 6. At this time, after the side close to the input pipe 2 is scraped by the cleaning rod 7, a small amount of small particles of impurities will remain in the sieve hole 6. By reversing the direction of the filter plate 5, the small particles of impurities remaining in the sieve hole 6 can be transferred to the side close to the output pipe 3. In the subsequent oil transportation process, the impact of the oil can flush the impurities on this side out of the sieve hole 6 and flow out from the output pipe 3. At this time, the effect of the small particles of impurities flowing out on the blockage of the pipeline valve can be ignored.

[0040] Then, the valve is opened again, and the connecting hole 19 rotates to a state connected with the housing 1. At this time, the outer wall of the control shaft 18 pushes the control key 23 to be compressed, and the operation of the electric telescopic rod 21 will not be triggered. The oil can be filtered through the filter plate 5 and output to the output pipe 3 for discharge again. The device does not require manual control, and can automatically switch the direction of the filter plate 5 when the valve is closed and realize self-cleaning of impurities only by opening and closing the valve. The cleaning is more thorough and efficient, and the clogging of the filter plate 5 is also avoided, thereby extending the service life of the entire equipment.

[0041] Example 2: Please refer to Figure 5-Figure 9 , this embodiment further illustrates the first embodiment, the switching mechanism shown in the figure includes a tension spring 25 fixedly installed at the bottom of the upper cleaning rod 7, a lifting frame 26 is slidably connected in the fixed frame 12 along the vertical direction, a plurality of first bevel gear blocks 27 are uniformly slidably connected in the lifting frame 26 along the horizontal direction, a second spring 28 fixedly connected to the lifting frame 26 is fixedly connected to the side of the first bevel gear block 27, the bottom end of the tension spring 25 is fixedly connected to the top surface of the lifting frame 26, and a plurality of second bevel gear blocks 29 capable of meshing and driving with the first bevel gear block 27 are uniformly fixedly connected to the outer wall of the rotating shaft 4.

[0042] The fixing frame 12 is fixedly connected with the mounting frame 30 , and the mounting frame 30 is slidably connected with a third bevel gear block 31 that can be unidirectionally engaged with the second bevel gear block 29 . A third spring 32 fixedly connected with the mounting frame 30 is fixedly connected to one side of the third bevel gear block 31 .

[0043] In the present embodiment, when the cleaning rod 7 on the upper side moves upward, the upper end of the tension spring 25 will be pulled upward. At this time, since the two sides of the filter plate 5 are respectively clamped by the cleaning rod 7 and the limit frame 11, the rotating shaft 4 cannot rotate, so that the lifting frame 26 cannot drive the first bevel gear block 27 to move upward. When the cleaning rod 7 and the limit frame 11 slide into the storage box 9, the clamping of the two sides of the filter plate 5 is released. At this time, under the pulling of the tension spring 25, the lifting frame 26 can be driven to move upward, and the first bevel gear block 27 drives the second bevel gear block 29 to make the rotating shaft 4 rotate unidirectionally, and the rotation of the rotating shaft 4 is limited by the third bevel gear block 31. At this time, since the shell 1 is full of oil and the sieve hole 6 of the filter plate 5 is small, the rotation speed of the filter plate 5 is low, which realizes the function of slowly rotating and switching the filter plate 5 during the pulling process of the tension spring 25.

[0044] When the lifting frame 26 moves up to the maximum displacement position, the rotating shaft 4 just rotates 180° to complete a switching of the filter plate 5. The third bevel gear block 31 is limited to prevent the rotating shaft 4 from continuing to rotate. Thereafter, the cleaning rod 7 and the limit frame 11 slide back and forth to reset, clamping and limiting the two sides of the filter plate 5. The cleaning rod 7 pushes the top of the tension spring 25 to force the lifting frame 26 to move downward, and the lifting frame 26 drives the bottom inclined surface of the first bevel gear block 27 to slide between the upper inclined surface of the second bevel gear block 29. The first bevel gear block 27 continuously slides and compresses the second spring 28 until the lifting frame 26 completely moves down to the lowest position. At this time, since the second bevel gear block 29 is limited by the one-way position of the third bevel gear block 31, it will not be pushed by the first bevel gear block 27 to make the rotating shaft 4 rotate in the opposite direction. In this way, the function of switching and flipping the filter plate 5 can be realized every time the cleaning rod 7 rotates into the storage box 9, and the linkage operation is simple and efficient.

[0045] 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.

[0046] 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. A wellhead valve for removing impurities from a pipeline during oil production, characterized in that: include: A shell (1), the side of the shell (1) being connected to an input pipe (2) and an output pipe (3); Also includes: A filtering mechanism, the filtering mechanism comprising a rotating shaft (4) rotatably connected to the inner wall of the housing (1), two groups of filter plates (5) being evenly fixedly connected to the outer wall of the rotating shaft (4), the outer walls of the two groups of filter plates (5) both being slidably fitted to the inner wall of the housing (1), and a plurality of groups of sieve holes (6) being evenly provided on the filter plates (5), for filtering the oil flowing in from one side of the input pipe (2) through the sieve holes (6) on the filter plates (5), and delivering the filtered oil to the output pipe (3); A cleaning mechanism, the cleaning mechanism comprising two groups of cleaning rods (7) installed in the housing (1), the side walls of the two groups of cleaning rods (7) respectively slidingly fitting with the outer walls of the filter plates (5) on both sides, for synchronously removing impurities on the two groups of filter plates (5) close to the input pipe (2) through the cleaning rods (7), and at the same time being capable of reinforcing and limiting the edges of the filter plates (5) when resetting; A switching mechanism is installed in the housing (1) and is used to link the rotating shaft (4) to rotate 180 degrees when the cleaning rod (7) has finished cleaning one side of the filter plate (5), so that the positions and directions of the two groups of filter plates (5) are switched, and then the uncleaned small particles of impurities in the sieve holes (6) are pushed to the side of the output pipe (3) for discharge through the flow of oil.

2. A wellhead valve for removing impurities from a pipeline during oil production according to claim 1, characterized in that: The cleaning mechanism further comprises a sealing frame (8) fixedly mounted on the side of the cleaning rod (7); the upper and lower sides of the shell (1) are fixedly connected to storage boxes (9); the shell (1) is provided with a connecting groove (10) connected to the storage box (9); the side of the sealing frame (8) is fixedly connected to a limiting frame (11) for reinforcing and limiting the edge position of the filter plate (5) away from the input pipe (2); the sealing frame (8) and the limiting frame (11) are both slidably connected to the inner wall of the connecting groove (10) in the vertical direction; and the shell (1) is provided with a driving member for synchronously adjusting the movement of the cleaning rods (7) on both sides.

3. A wellhead valve for removing impurities from a pipeline during oil production according to claim 2, characterized in that: The driving member comprises a fixed frame (12) fixedly mounted on both sides of the shell (1); the shell (1) and the fixed frame (12) are respectively provided with guide grooves (13) connected to the two groups of cleaning rods (7) in a sliding manner in a vertical direction; the two groups of fixed frames (12) are respectively fixedly connected with guide frames (14); guide blocks (15) are connected to the guide frames (14) in a sliding manner in a horizontal direction; two groups of rotating rods (16) are rotatably connected to the guide blocks (15) and are respectively connected to one end of the two groups of cleaning rods (7); and a control member for controlling the sliding state of the guide blocks (15) according to the opening and closing state of the output tube (3) is provided on the guide frame (14).

4. A wellhead valve for removing impurities from a pipeline during oil production according to claim 3, characterized in that: The control member comprises a control box (17) fixedly mounted on the output pipe (3), a control shaft (18) rotatably connected inside the control box (17), a connecting hole (19) for connecting the housing (1) and the output pipe (3) is provided on the control shaft (18), a knob (20) for controlling the direction of the connecting hole (19) is provided on the control shaft (18), and a synchronizing member for synchronously adjusting the sliding state of the guide block (15) according to the direction of the connecting hole (19) is provided on the control box (17).

5. A wellhead valve for removing impurities from a pipeline during oil production according to claim 4, characterized in that: The synchronization component comprises an electric telescopic rod (21) fixedly mounted on a group of the guide frames (14); the telescopic end of the electric telescopic rod (21) is fixedly connected to the side of a group of the guide blocks (15) at a close distance; a fixing box (22) is fixedly connected to the side of the control box (17); a control key (23) is slidably connected inside the fixing box (22); one end of the control key (23) is fixedly connected to a first spring (24) fixedly connected to the fixing box (22); and each time the control key (23) is popped out, it can drive the electric telescopic rod (21) to perform a reciprocating telescopic operation.

6. A wellhead valve for removing impurities from a pipeline during oil production according to claim 3, characterized in that: The switching mechanism comprises a tension spring (25) fixedly mounted on the bottom of the upper cleaning rod (7); a lifting frame (26) is slidably connected in the vertical direction in the fixed frame (12); a plurality of first bevel gear blocks (27) are uniformly slidably connected in the horizontal direction in the lifting frame (26); a second spring (28) fixedly connected to the lifting frame (26) is fixedly connected to the side of the first bevel gear block (27); the bottom end of the tension spring (25) is fixedly connected to the top surface of the lifting frame (26); and a plurality of second bevel gear blocks (29) capable of meshing and driving with the first bevel gear block (27) are uniformly fixedly connected to the outer wall of the rotating shaft (4).

7. A wellhead valve for removing impurities from a pipeline during oil production according to claim 6, characterized in that: A mounting frame (30) is fixedly connected inside the fixed frame (12), a third bevel gear block (31) capable of one-way clamping with the second bevel gear block (29) is slidably connected inside the mounting frame (30), and a third spring (32) fixedly connected to the mounting frame (30) is fixedly connected to one side of the third bevel gear block (31).

8. A wellhead valve for removing impurities from a pipeline during oil production according to claim 2, characterized in that: A fourth spring (33) is fixedly connected inside the storage box (9); one end of the fourth spring (33) is fixedly connected to a push plate (34) capable of pushing most of the impurities in the cleaning rod (7) and the sealing frame (8) into the storage box (9) for storage; the sides of the two groups of storage boxes (9) are respectively connected to collection pipes (35); the side of the housing (1) is fixedly connected to a collection box (36); the two groups of collection pipes (35) are connected to the side of the collection box (36).

9. A wellhead valve for removing impurities from a pipeline during oil production according to claim 1, characterized in that: Both ends of the sieve hole (6) are designed to have conical openings, so that the opening diameters at the two ends are larger than the inner wall diameter at the middle position.

10. A wellhead valve for removing impurities from a pipeline during oil production according to claim 3, characterized in that: The sides of the two groups of fixed frames (12) are respectively fixedly connected with sealing boxes (37).

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