Fracturing manifold gate valve with impurity deposition prevention effect

Abstract

The invention relates to the technical field of fracturing manifolds, and discloses a fracturing manifold gate valve with an impurity deposition prevention effect, the fracturing manifold gate valve comprises a valve body and a gate body, the top and the bottom of the valve body are detachably provided with an upper valve seat and a lower valve seat through screws respectively, and the valve body is internally provided with a fluid channel and a middle inner cavity which are communicated with each other; the fluid channel can be communicated with an inner channel formed in the gate body, and positioning guide rails matched with positioning guide grooves formed in the two sides of the gate body are fixedly connected to the inner walls of the two sides of the middle inner cavity. The multi-stage treatment assembly is used for primarily cleaning the sealed cavity and the gate body through a cleaning agent, then secondary cleaning is conducted through clear water, and water removal treatment is conducted through compressed air, cleaning is more thorough, release corners are formed in the edges of the two ends of the inner channel of the gate body, particle impurities are effectively intercepted, and the service life of the gate body is prolonged. And entering a sealing contact area is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing manifolds, and particularly to a gate valve for a fracturing manifold with an anti-impurity accumulation effect. Background Art

[0002] In the field of oil and gas exploitation, fracturing operation is an important production-increasing measure. As a key component in fracturing operation, the fracturing manifold plays a role in connecting the fracturing equipment and the wellbore and transporting high-pressure and high-sand-content fracturing fluid. And as a control element in the fracturing manifold, the performance of the gate valve directly affects the safety and efficiency of the fracturing operation.

[0003] However, there are still the following problems in the actual use of the existing gate valves for fracturing manifolds: 1. After long-term use, impurities accumulate between the gate plate and the valve seat, and the impurities existing between the two are likely to squeeze into the contact surface, which will lead to increased wear of the sealing surfaces of the gate plate and the valve seat. As the number of uses increases, the sealing performance gradually decreases, resulting in leakage and affecting normal use. 2. At present, although there are some improvement measures for preventing the accumulation of impurities in the gate valve, most of them have poor effects. Some improvement schemes simply add a flushing device, but the flushing effect is limited and cannot completely remove the accumulated impurities. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a gate valve for a fracturing manifold with an anti-impurity accumulation effect, mainly to solve the problems that after long-term use, impurities accumulate between the gate plate and the valve seat, and the impurities existing between the two are likely to squeeze into the contact surface, which will lead to increased wear of the sealing surfaces of the gate plate and the valve seat. As the number of uses increases, the sealing performance gradually decreases, resulting in leakage and affecting normal use, and at present, although there are some improvement measures for preventing the accumulation of impurities in the gate valve, most of them have poor effects. Some improvement schemes simply add a flushing device, but the flushing effect is limited and cannot completely remove the accumulated impurities.

[0005] To achieve the above object, the present invention provides the following technical solutions: A gate valve for a fracturing manifold with an anti-impurity accumulation effect, comprising a valve body and a gate body. The top and bottom of the valve body are respectively detachably installed with an upper valve seat and a lower valve seat through screws. A fluid passage and a middle inner cavity that are connected are opened inside the valve body. The fluid passage can be connected to an inner passage opened in the gate body. Positioning guide rails that cooperate with positioning guide grooves opened on both sides of the gate body are fixedly connected to the inner walls on both sides of the middle inner cavity. Outer cavities are opened at one ends of the upper valve seat and the lower valve seat close to the valve body. A sealed chamber is formed between the outer cavity and the middle inner cavity. Embedded sealing grooves are opened on both sides of the gate body, and sewage discharge grooves are opened at the bottoms of the embedded sealing grooves. Release angles with a multi-stage slope structure are opened at the edges of both ends of the inner passage. A sealing sleeve that contacts and seals with both sides of the gate body is arranged in the fluid passage. An opening and closing assembly for pulling the gate body to move is arranged between the upper valve seat and the lower valve seat. A silt cleaning assembly for cleaning the gate body is arranged inside the valve body. A multi-stage treatment assembly for performing multiple cleanings on the gate body is arranged outside the valve body. The multi-stage treatment assembly is communicated with the silt cleaning assembly through a diversion channel opened inside the valve body. A convex platform is formed by the upward protrusion of the inner wall at the bottom of the outer cavity of the lower valve seat. A sewage discharge channel communicated with the lowest point of the outer cavity is opened on one side of the lower valve seat.

[0006] As a further scheme of the present invention, the opening and closing assembly includes a threaded cylinder fixedly connected to the top of the upper valve seat. A threaded rod is threadedly connected inside the threaded cylinder. An upper pull rod and a lower pull rod that penetrate through the upper valve seat and the lower valve seat are respectively clamped at the top and bottom of the gate body. The top end of the upper pull rod is rotatably connected to the bottom end of the threaded rod. Dynamic seals one are arranged at the connection positions of the upper pull rod, the lower pull rod with the upper valve seat and the lower valve seat. A turntable for driving the threaded rod to rotate around its axis is fixedly connected to the top end of the threaded rod.

[0007] As a further solution of the present invention, the dredging component includes an upper fixing frame fixedly connected to the inner walls on both sides of the valve body near the top. The end of the upper fixing frame is fixedly connected with an upper nozzle. The tail end of the upper nozzle is communicated with an upper connecting pipe. One end of the upper connecting pipe is communicated with the diversion channel through an upper connector. Side insertion grooves are formed in the inner walls on both sides of the valve body near the bottom. An outer connecting rod penetrates through the side insertion grooves. A limiting ring matched with the side insertion grooves is fixedly connected to the outer circumference of the outer connecting rod. A limiting seat for blocking the position of the limiting ring is fixedly connected in the side insertion groove. A return spring is arranged between the limiting seat and the limiting ring. A rotating ring is arranged between the limiting ring and the return spring. A dynamic seal member II for sealing is arranged between the limiting seat and the outer connecting rod. A pin cylinder is formed at one end of the outer connecting rod. A shaft rod is inserted into the pin cylinder. A plurality of key bars for cooperating with the pin cylinder are arranged on the outer side of the shaft rod. A pressing spring is fixedly connected between one end of the shaft rod and the inner wall of the pin cylinder. The other end of the shaft rod is fixedly connected with two scraping arms. The end of the scraping arm is fixedly connected with a scraper that can contact the release angle. The scraper is a profiling structure of the release angle. The end of the outer connecting rod is fixedly connected with two oppositely distributed support arms. The end of the support arm is fixedly connected with a lower nozzle. A lower connecting pipe is communicated between the tail ends of the two lower nozzles. The end of the lower connecting pipe is communicated with the diversion channel through a lower connector. A double-acting driving component for driving the outer connecting rod to complete double actions of transverse movement and rotation is arranged on both sides of the valve body.

[0008] As a further solution of the present invention, the multi-stage treatment component includes a diversion cover fixedly connected to the outside of the valve body. A flow regulating disc is rotatably connected in the diversion cover. A confluence cavity is formed between the stepped surface of the flow regulating disc and the diversion cover. A diversion groove communicated with the confluence cavity is formed at the bottom of the diversion cover. A side connector connected to the diversion channel is fixedly connected in the diversion groove. A cleaning agent connection valve head for initially cleaning the sealing chamber and the gate body, a clean water connection valve head for secondary cleaning, and a gas connection valve head for water treatment are plugged and fixed on one side of the diversion cover. A through hole that can be communicated with the cleaning agent connection valve head, the clean water connection valve head, and the gas connection valve head is formed on one side of the flow regulating disc. A double-shaft extension synchronous motor is fixedly connected to the outside of the diversion cover. One end of the output shaft of the double-shaft extension synchronous motor passes through the diversion cover and is fixed to the flow regulating disc. A code disc is fixedly connected to the other end of the output shaft of the double-shaft extension synchronous motor. A side support is fixedly connected to the outside of the diversion cover. A photodetector matched with the code disc is fixedly connected to one side of the side support. A dust cover is arranged on one side of the diversion cover.

[0009] As a further solution of the present invention, the double-acting driving component is a rocker arm fixedly connected to the end of the outer connecting rod penetrating through the valve body.

[0010] As a further solution of the present invention, the double-acting drive assembly includes a mounting carriage fixedly connected to the outer side of the valve body. A rack is slidably connected to one side of the mounting carriage. The outer connecting rod penetrates through the end of the valve body and is fixedly connected to a drive gear disk engaged with the rack. The width of the drive gear disk is much larger than the width of the rack. A limiting disk is fixedly connected to the outer circumference of the outer connecting rod. A plurality of equally spaced mounting grooves are formed on one side of the limiting disk. A ball is rotatably connected in the mounting groove. A limiting mechanism for positioning the position of the drive gear disk is provided on the outer side of the valve body. A drive mechanism for driving the rack to reciprocate along the mounting carriage is provided on the outer side of the valve body.

[0011] As a further solution of the present invention, the drive mechanism includes a reciprocating lead screw rotatably connected to the inside of the mounting carriage through a bearing. A slider fixedly connected to one side of the rack is engaged with a bidirectional spiral groove formed on the outer side of the reciprocating lead screw. A drive motor for driving the reciprocating lead screw to rotate in the reverse direction along the axis is provided on the outer side of the valve body.

[0012] As a further solution of the present invention, the drive mechanism includes a reciprocating pull frame fixedly connected between the ends of the two racks. A gap is left between the reciprocating pull frame and the valve body.

[0013] As a further solution of the present invention, the limiting mechanism includes a rotating shaft rotatably connected to the outer side of the valve body. An eccentric wheel is fixedly connected to one side of the rotating shaft. A lower bayonet formed by imitating the shape of the limiting disk is opened at the bottom of the eccentric wheel. A pressing disk is fixedly connected to one side of the drive gear disk.

[0014] As a further solution of the present invention, the limiting mechanism includes an upper mounting frame fixedly connected to the top of the rack. A trapezoidal notch is opened on one side of the upper mounting frame. A slide bar is inserted into the outer side of the valve body. A trapezoidal force-bearing end engaged with the trapezoidal notch is provided at the end of the slide bar. A retaining seat for limiting the limiting disk is fixedly connected to the bottom of the slide bar.

[0015] Compared with the prior art, the present invention provides a gate valve for a fracturing manifold with an anti-impurity accumulation effect, and has the following beneficial effects: 1. The present invention effectively cleans the inner embedded sealing grooves on both sides of the upper gate body through the multi-stage treatment assembly and the dredging assembly.

[0016] 2. Release angles are opened at both ends of the inner channel of the gate body. The release angles are multi-stage slope structures. The first stage is a diversion slope with an angle of 15° for guiding the fluid to carry impurities. The second stage is a gentle slope with an angle of 10° for forming an impurity buffer area. An annular microgroove is provided between the diversion slope and the gentle slope for intercepting particulate impurities and preventing them from entering the seal contact area.

[0017] 3. The present invention facilitates the effective cleaning treatment of intercepted particulate impurities by the silt cleaning component and the multi-stage treatment component by arranging the inner channel at a lower position of the gate body.

[0018] 4. The present invention performs an evacuation treatment by opening the sewage discharge channel. Due to the effect of the boss at the bottom of the outer cavity of the lower valve seat, the impurities and fluid in the outer cavity are completely discharged.

[0019] 5. The present invention realizes the controllable rotation angle of the flow regulating disc through the combined use of a code disc and a light detector.

[0020] 6. The present invention performs multiple treatment operations on the sealed chamber and the gate body through the multi-stage treatment component, including preliminary cleaning with a cleaning agent, secondary cleaning with clean water, and water removal treatment with compressed air, resulting in more thorough cleaning.

[0021] 7. The present invention completes the position limit of the outer connecting rod through the combined use of a rotating shaft, an eccentric wheel, and a limit disc, facilitating the operator to perform forward and reverse rotation actions on the outer connecting rods on both sides of the gate valve simultaneously through a reciprocating pull frame.

[0022] 8. The present invention realizes the inward movement of the outer connecting rod without manually pressing and limiting the limit disc through the combined use of a trapezoidal notch and a trapezoidal force-bearing end, and still completes the forward and reverse rotation operations of the outer connecting rod during this process, making the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 1 is a front three-dimensional structural schematic diagram of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 2 FIG. 2 is a rear three-dimensional structural schematic diagram of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 3 FIG. 3 is a schematic diagram of the open state of the gate body of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 4 FIG. 4 is a schematic diagram of the closed state of the gate body of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 5 FIG. 5 is a schematic diagram of the enlarged structure of part A of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 4 FIG. 6 is a schematic diagram of the gate body structure of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 6 FIG. 7 is a schematic diagram of the silt cleaning component structure of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 7 FIG. 8 is a schematic diagram of the multi-stage treatment component structure of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention; Figure 8 Partial sectional structure schematic diagram of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 7 ; Figure 9 Schematic diagram of the sectional structure of the valve body of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 10 Internal structure schematic diagram of a multi-stage treatment component of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 11 Schematic diagram of the structure of a multi-stage treatment component of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 12 Schematic diagram of the structure of a double-acting drive component of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 13 Schematic diagram of the reciprocating pull frame structure of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 14 Schematic diagram of the upper mounting frame structure of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 15 Partial sectional structure schematic diagram of a gate valve for a fracturing manifold with an anti-impurity accumulation effect proposed by the present invention Figure 14 ;

[0024] In the figure: 1, valve body; 2, threaded cylinder; 3, threaded rod; 4, multi-stage treatment component; 5, gate body; 6, silt cleaning component; 7, lower pull rod; 8, dynamic seal one; 9, seal sleeve; 10, upper pull rod; 11, positioning guide rail; 12, middle inner cavity; 13, double-acting drive component; 14, fluid channel; 101, upper valve seat; 102, lower valve seat; 103, convex platform; 104, sewage discharge channel; 105, outer cavity; 401, shunt cover; 402, dust cover; 403, shunt channel; 404, double-shaft extension synchronous motor; 405, flow regulating disc; 406, diversion groove; 407, confluence cavity; 408, through hole; 409, cleaning agent connection valve head; 410, clean water connection valve head; 411, gas connection valve head; 412, code disc; 413, light detector; 414, side bracket; 415, side connection head; 501, embedded seal groove; 502, release angle; 503, sewage discharge groove; 504, inner channel; 505, positioning guide groove; 601. Upper fixing frame; 602. Upper connector; 603. Upper nozzle; 604. Upper connecting pipe; 605. Outer connecting rod; 606. Limit seat; 607. Lower connecting pipe; 608. Lower nozzle; 609. Lower connector; 610. Shaft rod; 611. Scraper; 612. Scraping arm; 613. Return spring; 614. Limit ring; 615. Rotating ring; 616. Compression spring; 617. Pin cylinder; 618. Key strip; 619. Dynamic seal two; 620. Side groove 1301. Rocker arm; 1302. Driving gear disc; 1303. Rack; 1304. Slide block; 1305. Installation slide; 1306. Driving motor; 1307. Reciprocating lead screw; 1308. Limit disc; 1309. Installation groove; 1310. Ball; 1311. Lower bayonet; 1312. Eccentric wheel; 1313. Rotating shaft; 1314. Reciprocating puller; 1315. Upper mounting frame; 1316. Trapezoidal notch; 1317. Trapezoidal stress end; 1318. Stop seat; 1319. Slide bar; 1320. Pressing disc Specific implementation mode

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention

[0026] The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention

[0027] In the present invention, unless otherwise expressly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate medium. Also, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower level than the second feature in terms of horizontal height.

[0028] Referring to Figures 1 - 10, a gate valve for a fracturing manifold with an anti-impurity accumulation effect, comprising a valve body 1 and a gate body 5. The top and bottom of the valve body 1 are respectively detachably installed with an upper valve seat 101 and a lower valve seat 102 by screws. A fluid passage 14 and a middle inner cavity 12 are provided in the valve body 1 and are connected to each other. The fluid passage 14 can be connected to an inner passage 504 provided in the gate body 5. Positioning guide rails 11 that cooperate with positioning guide grooves 505 provided on both sides of the gate body 5 are fixed to both inner side walls of the middle inner cavity 12 by bolts. Outer cavities 105 are provided at one ends of the upper valve seat 101 and the lower valve seat 102 close to the valve body 1. A sealed chamber is formed between the outer cavity 105 and the middle inner cavity 12. Embedded sealing grooves 501 are provided on both sides of the gate body 5. A sewage discharge groove 503 is provided at the bottom of the embedded sealing groove 501. The sewage discharge groove 503 facilitates the drainage and guiding of the embedded sealing groove 501. Release angles 502 are provided at both ends of the inner passage 504. A sealing sleeve 9 that is in contact and sealed with both sides of the gate body 5 is provided in the fluid passage 14. An opening and closing assembly for pulling the gate body 5 to move is provided between the upper valve seat 101 and the lower valve seat 102. The opening and closing assembly includes a threaded cylinder 2 welded to the top of the upper valve seat 101. A threaded rod 3 is threadedly connected to the threaded cylinder 2. Upper pull rods 10 and lower pull rods 7 that penetrate through the upper valve seat 101 and the lower valve seat 102 are respectively clamped at the top and bottom of the gate body 5. The top end of the upper pull rod 10 is rotatably connected to the bottom end of the threaded rod 3. Dynamic seals 8 are provided at the connection positions of the upper pull rod 10, the lower pull rod 7 with the upper valve seat 101 and the lower valve seat 102. A turntable for driving the threaded rod 3 to rotate around its axis is fixed to the top end of the threaded rod 3 by bolts. By rotating the turntable, the turntable drives the threaded rod 3 to rotate. At this time, the threaded rod 3 moves vertically along the threaded cylinder 2. At this time, the threaded rod 3 pulls the gate body 5 through the upper pull rod 10 to perform the actions of blocking or relieving the blockage. A silt cleaning assembly 6 for cleaning the gate body 5 is provided inside the valve body 1. A multi-stage treatment assembly 4 for performing multiple cleanings on the gate body 5 is provided outside the valve body 1. The multi-stage treatment assembly 4 is communicated with the silt cleaning assembly 6 through a diversion channel 403 provided inside the valve body 1. The bottom inner wall of the outer cavity 105 of the lower valve seat 102 bulges upward to form a bossWhen the sealing sleeve 9 switches from the state of fitting and blocking with the embedded sealing groove 501 opened in the gate body 5 to the state of communicating with the inner channel 504, or from the state of communicating with the inner channel 504 to the state of fitting and blocking with the embedded sealing groove 501 opened in the gate body 5, the accumulated impurities between the two are easily squeezed into the space between the sealing sleeve 9 and the embedded sealing groove 501, which not only affects the sealing effect of the gate body 5, but also easily causes irreversible loss of the contact surface between the gate body 5 and the sealing sleeve 9. Therefore, release angles 502 are provided at both ends of the inner channel 504 of the gate body 5. The release angle 502 is a multi-stage slope structure. The first stage is a diversion slope with an angle of 15° for guiding the fluid to carry impurities, and the second stage is a gentle slope with an angle of 10° for forming an impurity buffer area. A circular micro-groove is provided between the diversion slope and the gentle slope for intercepting particulate impurities and preventing them from entering the sealing contact area. When the gate body 5 blocks the fluid channel 14, the inner channel 504 and the release angle 502 are exposed at this time. Therefore, the intercepted particulate impurities are effectively cleaned by the silt removal component 6 and the multi-stage treatment component 4, and the treated sewage is discharged through the sewage discharge channel 104.,

[0029] The dredging component 6 in the present invention includes an upper fixing frame 601 fixed to the inner walls on both sides of the valve body 1 near the top by bolts. The end of the upper fixing frame 601 is fixed with an upper nozzle 603 by bolts. The tail end of the upper nozzle 603 is communicated with an upper connecting pipe 604. One end of the upper connecting pipe 604 is communicated with the shunt channel 403 through an upper connector 602. Side embedding grooves 620 are opened on the inner walls on both sides of the valve body 1 near the bottom. An outer connecting rod 605 penetrates through the side embedding grooves 620. A limiting ring 614 matched with the side embedding grooves 620 is fixed to the outer circumference of the outer connecting rod 605 by bolts. A limiting seat 606 for blocking the position of the limiting ring 614 is fixed to the side embedding grooves 620 by bolts. A return spring 613 is arranged between the limiting seat 606 and the limiting ring 614. A rotating ring 615 is arranged between the limiting ring 614 and the return spring 613. A dynamic seal member two 619 for sealing is arranged between the limiting seat 606 and the outer connecting rod 605. A pin cylinder 617 is opened at one end of the outer connecting rod 605. A shaft rod 610 is inserted into the pin cylinder 617. A plurality of key bars 618 for matching with the pin cylinder 617 are arranged on the outer side of the shaft rod 610. A pressing spring 616 is fixed to the inner wall of the pin cylinder 617 and the end of the shaft rod 610 by bolts. Two scraping arms 612 are fixed to the other end of the shaft rod 610 by bolts. A scraper 611 capable of contacting the release angle 502 is fixed to the end of the scraping arm 612 by bolts. The scraper 611 is a profiling structure of the release angle 502. Two oppositely distributed support arms are welded to the end of the outer connecting rod 605. A lower nozzle 608 is fixed to the end of the support arm by bolts. A lower connecting pipe 607 is communicated between the tail ends of the two lower nozzles 608. The end of the lower connecting pipe 607 is communicated with the shunt channel 403 through a lower connector 609. Double-acting driving components 13 for driving the outer connecting rod 605 to complete double actions of horizontal movement and rotation are arranged on both sides of the valve body 1. The double-acting driving components 13 are rocker arms 1301 fixed to the end of the outer connecting rod 605 penetrating through the valve body 1 by bolts. When cleaning the embedded sealing groove 501 of the gate body 5, liquid spraying, water spraying and air jetting triple cleaning operations are carried out by connecting the upper nozzle 603 and the lower nozzle 608 through the multi-stage treatment component 4. When cleaning the release angle 502 opened in the inner channel 504 of the gate body 5, the staff needs to manually press the two rocker arms 1301. The rocker arms 1301 are stressed to drive the outer connecting rod 605 to drive the scraping arms 612 to move inwards until the scraper 611 arranged at the end of the scraping arm 612 contacts the release angle 502. At this time, under the action of the pressing spring 616, the scraper 611 is in elastic contact with the release angle 502, effectively protecting the scraper 611. Then the rocker arms 1301 are swung left and right. At this time, the outer connecting rod 605 drives the two scraping arms 612 and the scraper 611 to rotate reciprocally through the key bars 618. That is, when the swing amplitude of the rocker arms 1301 exceeds 180°, the two scrapers 611 can clean the entire release angle 502. At the same time, the lower nozzle 608 performs liquid spraying, water spraying and air jetting operations on the release angle 502 in sequence.Furthermore, it assists in improving the cleanliness of the cleaning of the release angle 502.,

[0030] In the present invention, the multi-stage processing component 4 includes a flow dividing cover 401 fixed to the outside of the valve body 1 by bolts. A flow regulating disc 405 is rotatably connected inside the flow dividing cover 401. A confluence chamber 407 is formed between the stepped surface of the flow regulating disc 405 and the flow dividing cover 401. A flow guiding groove 406 communicating with the confluence chamber 407 is opened at the bottom of the flow dividing cover 401. A side connection head 415 connected to the flow dividing channel 403 is fixed in the flow guiding groove 406 by bolts. A cleaning agent connection valve head 409 for initially cleaning the sealing chamber and the gate body 5, a clean water connection valve head 410 for secondary cleaning, and a gas connection valve head 411 for water treatment are inserted and fixed on one side of the flow dividing cover 401. A through hole 408 that can communicate with the cleaning agent connection valve head 409, the clean water connection valve head 410, and the gas connection valve head 411 is opened on one side of the flow regulating disc 405. A double-shaft extension synchronous motor 404 is fixed to the outside of the flow dividing cover 401 by bolts. One end of the output shaft of the double-shaft extension synchronous motor 404 passes through the flow dividing cover 401 and is fixed to the flow regulating disc 405. A code disc 412 is fixed to the other end of the output shaft of the double-shaft extension synchronous motor 404 by bolts. A side support 414 is fixed to the outside of the flow dividing cover 401 by bolts. A photodetector 413 cooperating with the code disc 412 is fixed to one side of the side support 414 by bolts. A dust-proof cover 402 is provided on one side of the flow dividing cover 401. The cleaning agent connection valve head 409, the clean water connection valve head 410, and the gas connection valve head 411 are respectively communicated with an external cleaning agent pipeline, a clean water pipeline, and a gas pipeline. When the double-shaft extension synchronous motor 404 rotates, it drives the flow regulating disc 405 and the code disc 412 to rotate synchronously. At this time, through the cooperation of the code disc 412 and the photodetector 413, the rotation angle of the flow regulating disc 405 can be controlled. Therefore, when in use, when the double-shaft extension synchronous motor 404 rotates counterclockwise, it drives the flow regulating disc 405 to rotate counterclockwise. When the through hole 408 of the flow regulating disc 405 communicates with the cleaning agent connection valve head 409, the cleaning agent in the external cleaning agent pipeline flows into the confluence chamber 407 through the through hole 408, and then enters the flow dividing channel 403 in the valve body 1 through the flow guiding groove 406 and the side connection head 415. Then, it enters the upper nozzle 603 and the lower nozzle 608 through the upper connection head 602, the upper connecting pipe 604, the lower connection head 609, and the lower connecting pipe 607 and is sprayed out. At this time, the double-shaft extension synchronous motor 404 stops for 5 s and then continues to rotate counterclockwise until the through hole 408 of the flow regulating disc 405 communicates with the clean water connection valve head 410. Then, the clean water enters the upper nozzle 603 and the lower nozzle 608 through the above flow channels and is sprayed out for clean water cleaning operation. At this time, the double-shaft extension synchronous motor 404 stops for 15 s and then continues to rotate counterclockwise until the through hole 408 of the flow regulating disc 405 communicates with the gas connection valve head 411. Then, the compressed air enters the upper nozzle 603 and the lower nozzle 608 through the above flow channels and is sprayed out for air water stain removal operation. At this time, the double-shaft extension synchronous motor 404 stops for 30 s and then continues to rotate counterclockwise until it resets. Thus, a cleaning operation is completed.

[0031] When the present invention is in use, it is divided into the following steps: S1: Taking the position state of the gate body 5 at Figure 3 as an example, first, rotate the turntable. The turntable drives the threaded rod 3 to rotate. At this time, the threaded rod 3 moves vertically downward along the threaded barrel 2. At this time, the threaded rod 3 pulls the gate body 5 through the upper pull rod 10 to complete the blocking action; S2: Then, the cleaning agent connection valve head 409, the clean water connection valve head 410, and the air connection valve head 411 are respectively connected to the external cleaning agent pipeline, the clean water pipeline, and the air pipeline. The double-shaft extension synchronous motor 404 rotates to drive the flow regulating disc 405 and the code disc 412 to rotate synchronously. At this time, through the cooperation of the code disc 412 and the optical detector 413, the rotation angle of the flow regulating disc 405 can be controlled. Therefore, when in use, the double-shaft extension synchronous motor 404 rotates counterclockwise to drive the flow regulating disc 405 to rotate counterclockwise. When the through hole 408 of the flow regulating disc 405 communicates with the cleaning agent connection valve head 409, the cleaning agent in the external cleaning agent pipeline flows into the confluence chamber 407 through the through hole 408, and then enters the shunt channel 403 in the valve body 1 through the diversion groove 406 and the side connection head 415, and then enters the upper nozzle 603 and the lower nozzle 608 through the upper connection head 602, the upper connecting pipe 604, the lower connection head 609, and the lower connecting pipe 607 and is sprayed out; S3: At the same time, the staff manually presses the two rocker arms 1301. The rocker arms 1301 are stressed to drive the outer connecting rod 605 to drive the scraping arm 612 to move inward until the scraper 611 provided at the end of the scraping arm 612 contacts the release angle 502. At this time, under the action of the compression spring 616, the scraper 611 is in elastic contact with the release angle 502, effectively protecting the scraper 611. Then, swing the rocker arms 1301 left and right. At this time, the outer connecting rod 605 drives the two scraping arms 612 and the scraper 611 to rotate reciprocally through the key bar 618, that is, when the swing amplitude of the rocker arms 1301 exceeds 180°, the two scrapers 611 can clean the entire release angle 502; S4: At this time, the double-shaft extended synchronous motor 404 stops for 5 s and then continues to rotate counterclockwise. When the through-hole 408 of the flow control disk 405 communicates with the clear water connection valve head 410, clear water enters the upper nozzle 603 and the lower nozzle 608 through the above-mentioned flow channel and is ejected to perform the clear water cleaning operation. At this time, the double-shaft extended synchronous motor 404 stops for 15 s and then continues to rotate counterclockwise. When the through-hole 408 of the flow control disk 405 communicates with the air connection valve head 411, compressed air enters the upper nozzle 603 and the lower nozzle 608 through the above-mentioned flow channel and is ejected to perform the air water stain removal operation. During the air water stain removal operation, the scraper 611 does not scrape the release angle 502. At this time, the double-shaft extended synchronous motor 404 stops for 30 s and then continues to rotate counterclockwise until it is reset. Thus, one cleaning operation is completed, and the sewage and compressed air are discharged through the sewage discharge channel 104; S5: When the gate valve is opened, the turntable is rotated in the reverse direction. The turntable drives the threaded rod 3 to rotate in the reverse direction. At this time, the threaded rod 3 moves vertically upward along the threaded barrel 2. At this time, the threaded rod 3 pulls the gate body 5 through the upper pull rod 10 to complete the docking action between the inner channel 504 and the fluid channel 14; S6: During the process of pulling up the gate body 5, the fluid channel 14 will have a short intersection with the inner channel 504. The impurities accumulated on the side of the embedded sealing groove 501 will converge into the outer cavity 105 of the lower valve seat 102 under the drive of the fluid. At this time, the sewage discharge channel 104 can be opened for evacuation treatment. Due to the action of the convex platform 103 at the bottom of the outer cavity 105 of the lower valve seat 102, the impurities and fluid in the outer cavity 105 are completely discharged; S7: Then only repeat the operation of S4 to perform multi-stage cleaning on the embedded sealing grooves 501 on both sides of the gate body 5 by the upper nozzle 603. In this way, not only the impurities are solved, but also the service life of the gate valve is effectively improved. Embodiment 1

[0032] Since it is necessary for the staff to manually press the outer connecting rod 605 and then continuously swing the outer connecting rod 605 through the rocker arm 1301, the operation time is long and the labor intensity is high. To solve the above problems, first, a carriage 1305 is fixedly installed on the outside of the valve body 1 by bolts. A rack 1303 is slidably connected to one side of the installed carriage 1305. A driving gear disk 1302 meshing with the rack 1303 is fixedly installed by bolts at the end of the outer connecting rod 605 passing through the valve body 1. The width of the driving gear disk 1302 is much larger than the width of the rack 1303. A limiting disk 1308 is fixedly installed on the outer circumference of the outer connecting rod 605 by bolts. Then, a reciprocating pulling frame 1314 is fixedly installed by bolts between the ends of the two racks 1303, and a gap is left between the reciprocating pulling frame 1314 and the valve body 1. A rotating shaft 1313 is rotatably connected to the outside of the valve body 1. An eccentric wheel 1312 is fixedly installed on one side of the rotating shaft 1313 by bolts. A lower bayonet 1311 is opened at the bottom of the eccentric wheel 1312 and is shaped in imitation of the limiting disk 1308. A pressing disk 1320 is fixedly installed on one side of the driving gear disk 1302 by bolts. Therefore, by rotating the rotating shaft 1313, the rotating shaft 1313 can drive the eccentric wheel 1312 to turn upwards by 180°. Then, by pressing the pressing disk 1320 by hand, the pressing disk 1320 can drive the outer connecting rod 605 to move inwards under force, and the limiting disk 1308 can be moved to a specified position. At this time, the rotating shaft 1313 is rotated in the reverse direction to reset, so that the eccentric wheel 1312 limits the limiting disk 1308 through the opened lower bayonet 1311. At this time, since the width of the driving gear disk 1302 is much larger than the width of the rack 1303, the driving gear disk 1302 is always meshed with the rack 1303. Then, by pulling the reciprocating pulling frame 1314, the two racks 1303 are driven to slide along the carriage 1305 at the same time. The left and right swinging of the rack 1303 enables the driving gear disk 1302 to drive the outer connecting rod 605 to rotate forward and backward, which is more convenient.

[0033] Since there is a certain frictional force between the limiting disk 1308 and the lower bayonet 1311 during rotation, a plurality of equally spaced installation grooves 1309 are opened on one side of the limiting disk 1308. A ball 1310 is rotatably connected in the installation groove 1309. At this time, the ball 1310 contacts the lower bayonet 1311, so as to effectively reduce the frictional force between the limiting disk 1308 and the lower bayonet 1311 during rotation, and it is more labor-saving when pulling and pressing.

[0034] And an electric method can be used to replace the manual operation of the staff. The specific method is as follows: First, the reciprocating screw 1307 is installed inside the installation slide 1305 through a bearing, and a slider 1304 is fixed to one side of the rack 1303 by bolts, which cooperates with the bidirectional spiral groove opened on the outside of the reciprocating screw 1307. A driving motor 1306 is provided on the outside of the valve body 1 to drive the reciprocating screw 1307 to rotate in the opposite direction along the axis. Therefore, by starting the driving motor 1306, the driving motor 1306 can rotate to drive the reciprocating screw 1307 to rotate. At this time, the slider 1304 drives the rack 1303 to move back and forth along the bidirectional spiral groove opened on the outside of the reciprocating screw 1307, thereby realizing the operation of driving the toothed disc 1302 to drive the external connecting rod 605 to rotate forward and reverse. Example 2

[0035] During use, the staff needs to manually press the pressing plate 1320 and complete the limiting operation of the limiting plate 1308 through cooperation with the eccentric wheel 1312. After cleaning is completed, the limiting state of the limiting plate 1308 needs to be touched again, which is a cumbersome process.

[0036] Therefore, the pressing plate 1320, the lower snap-on socket 1311, the eccentric wheel 1312 and the rotating shaft 1313 are removed, and then the upper mounting frame 1315 is fixed to the top of the rack 1303 by bolts. A trapezoidal groove 1316 is provided on one side of the upper mounting frame 1315, and a sliding bar 1319 is inserted into the outer side of the valve body 1. The end of the sliding bar 1319 is provided with a trapezoidal force-bearing end 1317 that cooperates with the trapezoidal groove 1316. The bottom of the sliding bar 1319 is fixed with a block seat 1318 for limiting the limit plate 1308 by bolts.

[0037] At this time, since the trapezoidal slot 1316 and the trapezoidal force-bearing end 1317 are in contact through the inclined surface, when the rack 1303 moves back and forth, the trapezoidal slot 1316 squeezes the trapezoidal force-bearing end 1317 through the inclined surface and applies a force to move outward. At this time, the trapezoidal force-bearing end 1317 drives the slide 1319 to move to the right until the trapezoidal force-bearing end 1317 is out of contact with the trapezoidal slot 1316. At this time, the slide 1319 moves to the right and drives the limit plate 1308 to move to the right through the block seat 1318. At this time, there is no need to manually press the limit plate 1308 to limit it, and the action of the external connecting rod 605 moving inward is also realized. In this process, the forward and reverse rotation operation of the external connecting rod 605 is still completed, and the operation is more convenient.

[0038] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A gate valve for a fracturing manifold with an anti-impurity accumulation effect, comprising a valve body (1) and a gate body (5). The top and bottom of the valve body (1) are respectively detachably installed with an upper valve seat (101) and a lower valve seat (102) through screws, characterized in that, The interior of the valve body (1) is provided with a fluid passage (14) and a middle inner cavity (12) that are connected and communicate with each other. The fluid passage (14) can be connected and communicate with an inner passage (504) provided in the gate body (5). Positioning guide rails (11) that cooperate with positioning guide grooves (505) provided on both sides of the gate body (5) are fixedly connected to the inner walls on both sides of the middle inner cavity (12). Outer cavities (105) are provided at one ends of the upper valve seat (101) and the lower valve seat (102) close to the valve body (1). A sealed chamber is formed between the outer cavity (105) and the middle inner cavity (12). Embedded sealing grooves (501) are provided on both sides of the gate body (5), and sewage discharge grooves (503) are provided at the bottoms of the embedded sealing grooves (501). Release angles (502) with a multi-stage slope structure are provided at the edges of both ends of the inner passage (504). A sealing sleeve (9) that is in contact and sealed with both sides of the gate body (5) is provided in the fluid passage (14). An opening and closing assembly for pulling the gate body (5) to move is provided between the upper valve seat (101) and the lower valve seat (102). A silt cleaning assembly (6) for cleaning the gate body (5) is provided inside the valve body (1). A multi-stage treatment assembly (4) for performing multiple cleanings on the gate body (5) is provided outside the valve body (1). The multi-stage treatment assembly (4) is communicated with the silt cleaning assembly (6) through a diversion channel (403) provided inside the valve body (1). The inner wall of the bottom of the outer cavity (105) of the lower valve seat (102) bulges upward to form a boss (103). A sewage discharge channel (104) that communicates with the lowest point of the outer cavity (105) is provided on one side of the lower valve seat (102).

2. The gate valve for a fracturing manifold with an anti-impurity deposition effect according to claim 1, wherein, The opening and closing assembly includes a threaded cylinder (2) fixedly connected to the top of the upper valve seat (101). A threaded rod (3) is threadedly connected inside the threaded cylinder (2). An upper pull rod (10) and a lower pull rod (7) that penetrate through the upper valve seat (101) and the lower valve seat (102) are respectively clamped at the top and bottom of the gate body (5). The top end of the upper pull rod (10) is rotatably connected to the bottom end of the threaded rod (3). Dynamic seals one (8) are provided at the connection positions of the upper pull rod (10), the lower pull rod (7) with the upper valve seat (101), and the lower valve seat (102). A turntable for driving the threaded rod (3) to rotate around its axis is fixedly connected to the top end of the threaded rod (3).

3. The gate valve for a fracturing manifold with an anti-impurity accumulation effect according to claim 1, characterized in that, The dredging component (6) includes an upper fixing frame (601) fixedly connected to the inner walls on both sides of the valve body (1) near the top position. The end of the upper fixing frame (601) is fixedly connected to an upper nozzle (603). The tail end of the upper nozzle (603) is communicated with an upper connecting pipe (604). One end of the upper connecting pipe (604) is communicated with the shunt channel (403) through an upper connector (602). Side slots (620) are formed in the inner walls on both sides of the valve body (1) near the bottom position. An outer connecting rod (605) penetrates through the side slots (620). A limiting ring (614) that cooperates with the side slots (620) is fixedly connected to the outer circumference of the outer connecting rod (605). A limiting seat (606) that blocks the position of the limiting ring (614) is fixedly connected in the side slots (620). A return spring (613) is arranged between the limiting seat (606) and the limiting ring (614). A rotating ring (615) is arranged between the limiting ring (614) and the return spring (613). A second dynamic seal (619) for sealing is arranged between the limiting seat (606) and the outer connecting rod (605). A pin cylinder (617) is formed at one end of the outer connecting rod (605). A shaft rod (610) is inserted into the pin cylinder (617). A plurality of key bars (618) that cooperate with the pin cylinder (617) are arranged on the outer side of the shaft rod (610). A compression spring (616) is fixedly connected between one end of the shaft rod (610) and the inner wall of the pin cylinder (617). The other end of the shaft rod (610) is fixedly connected to two scraping arms (612). A scraper (611) that can contact the release angle (502) is fixedly connected to the end of the scraping arm (612). The scraper (611) is a profiling structure of the release angle (502). Oppositely distributed two support arms are fixedly connected to the end of the outer connecting rod (605). A lower nozzle (608) is fixedly connected to the end of the support arm. A lower connecting pipe (607) is communicated between the tail ends of the two lower nozzles (608). The end of the lower connecting pipe (607) is communicated with the shunt channel (403) through a lower connector (609). A double-acting drive assembly (13) for driving the outer connecting rod (605) to complete double actions of transverse movement and rotation is arranged on both sides of the valve body (1).

4. The gate valve for a fracturing manifold with an anti-impurity accumulation effect according to claim 1, wherein, The multi-stage processing component (4) includes a flow splitting cover (401) fixedly connected to the outside of the valve body (1). A flow regulating disc (405) is rotatably connected inside the flow splitting cover (401). A confluence chamber (407) is formed between the stepped surface of the flow regulating disc (405) and the flow splitting cover (401). A diversion groove (406) communicating with the confluence chamber (407) is formed at the bottom of the flow splitting cover (401). A side connection head (415) connected to the flow splitting channel (403) is fixedly connected inside the diversion groove (406). A cleaning agent connection valve head (409) for initially cleaning the sealing chamber and the gate body (5), a clean water connection valve head (410) for secondary cleaning, and a gas connection valve head (411) for water treatment are inserted and fixed on one side of the flow splitting cover (401). A through hole (408) that can communicate with the cleaning agent connection valve head (409), the clean water connection valve head (410), and the gas connection valve head (411) is formed on one side of the flow regulating disc (405). A double-shaft extension synchronous motor (404) is fixedly connected to the outside of the flow splitting cover (401). One end of the output shaft of the double-shaft extension synchronous motor (404) passes through the flow splitting cover (401) and is fixed to the flow regulating disc (405). A code disc (412) is fixedly connected to the other end of the output shaft of the double-shaft extension synchronous motor (404). A side support (414) is fixedly connected to the outside of the flow splitting cover (401). A photodetector (413) matched with the code disc (412) is fixedly connected to one side of the side support (414). A dust cover (402) is arranged on one side of the flow splitting cover (401).

5. The gate valve for a fracturing manifold with an anti-impurity accumulation effect according to claim 3, characterized in that, The double-acting driving component (13) is a rocker arm (1301) fixedly connected to the end of the outer connecting rod (605) penetrating through the valve body (1).

6. The gate valve for a fracturing manifold with an anti-impurity accumulation effect according to claim 3, wherein, The double-acting driving component (13) includes an installation sliding frame (1305) fixedly connected to the outside of the valve body (1). A rack (1303) is slidably connected to one side of the installation sliding frame (1305). A driving gear disc (1302) meshed with the rack (1303) is fixedly connected to the end of the outer connecting rod (605) penetrating through the valve body (1). The width of the driving gear disc (1302) is much larger than the width of the rack (1303). A limiting disc (1308) is fixedly connected to the outer circumference of the outer connecting rod (605). A plurality of equally spaced installation grooves (1309) are formed on one side of the limiting disc (1308). A ball (1310) is rotatably connected inside the installation groove (1309). A limiting mechanism for positioning the position of the driving gear disc (1302) is arranged on the outside of the valve body (1). A driving mechanism for driving the rack (1303) to reciprocate along the installation sliding frame (1305) is arranged on the outside of the valve body (1).

7. The gate valve for a fracturing manifold with an anti-impurity accumulation effect according to claim 6, wherein The driving mechanism includes a reciprocating lead screw (1307) rotatably connected inside the mounting carriage (1305) through a bearing. One side of the rack (1303) is fixedly connected with a slider (1304) that cooperates with a bidirectional spiral groove formed on the outer side of the reciprocating lead screw (1307). A driving motor (1306) for driving the reciprocating lead screw (1307) to rotate reversely along the axis is provided on the outer side of the valve body (1).

8. The gate valve for a fracturing manifold with an anti-impurity accumulation effect according to claim 6, wherein, The driving mechanism includes a reciprocating puller (1314) fixedly connected between the ends of the two racks (1303). A gap is left between the reciprocating puller (1314) and the valve body (1).

9. The gate valve for a fracturing manifold with an anti-impurity deposition effect according to claim 6, characterized in that, The limiting mechanism includes a rotating shaft (1313) rotatably connected to the outer side of the valve body (1). One side of the rotating shaft (1313) is fixedly connected with an eccentric wheel (1312). A lower bayonet (1311) formed by copying the limiting disc (1308) is provided at the bottom of the eccentric wheel (1312). One side of the driving gear disc (1302) is fixedly connected with a pressing disc (1320).

10. The gate valve for a fracturing manifold with an anti-impurity accumulation effect according to claim 6, wherein, The limiting mechanism includes an upper mounting frame (1315) fixedly connected to the top of the rack (1303). A trapezoidal notch (1316) is provided on one side of the upper mounting frame (1315). A sliding bar (1319) is inserted into the outer side of the valve body (1). A trapezoidal stress end (1317) that cooperates with the trapezoidal notch (1316) is provided at the end of the sliding bar (1319). A retaining seat (1318) for limiting the limiting disc (1308) is fixedly connected to the bottom of the sliding bar (1319).

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