A deep sea flat gate valve with sand draining guide groove and cleaning gate structure

Abstract

The application relates to the technical field of valves, in particular to a deep-sea flat gate valve with a sand discharging flow guide groove and a cleaning gate plate structure. At least one group of cleaning assemblies is arranged in the flow channel. The cleaning assembly is movably arranged in the flow channel through a reset assembly. The cleaning assembly comprises a cleaning ring, a cleaning scraper and a cleaning scraper plate arranged on the cleaning ring. The cleaning scraper is attached to the side wall of the gate plate. The cleaning scraper plate is attached to the inner wall of the flow channel. The cleaning assembly is in transmission connection with the gate plate. When the gate plate rises or falls, the cleaning ring simultaneously drives the cleaning scraper and the cleaning scraper plate to move. The application automatically scrapes off impurities or deposits on the side wall of the gate plate and the inner wall of the flow channel through the cleaning assembly, thereby ensuring the smoothness of the valve under long-term work.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a deep-sea flat gate valve with a sand discharge channel and a cleaning gate structure. Background Technology

[0002] A flat gate valve is a sliding valve that uses a parallel gate as its opening and closing element. The flow of fluid is controlled by the raising and lowering of the gate. Its core structure includes the valve body, valve seat, gate, valve stem, and transmission device. With its bidirectional sealing, low flow resistance, wear resistance, and corrosion resistance, it has become a key piece of equipment in the petroleum, natural gas, chemical, and water supply industries. With the rise of emerging fields such as hydrogen energy and deep-sea development, flat gate valves, due to their sealing performance and pressure resistance, have become crucial equipment, capable of adapting to high-pressure, low-temperature, and highly corrosive environments.

[0003] Flat gate valves installed in the deep sea face the problem of extremely high maintenance costs. Therefore, once installed, they need to be able to maintain normal operation for at least 15 to 20 years to ensure that the flow channel is not easily blocked by impurities during long-term operation. A self-cleaning deep-sea flat gate valve is proposed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a deep-sea flat gate valve with a sand discharge channel and a cleaning gate structure. This invention ensures the smooth operation of the valve during long-term operation by automatically scraping away impurities or deposits from the side wall of the gate and the inner wall of the flow channel through the cleaning component.

[0005] The technical solution adopted in this invention is as follows: A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure includes a valve body, a valve seat, a gate, a valve stem, and a transmission device. The valve body has a flow channel. The valve seat and the gate are sealed and fitted inside the valve body to control the opening and closing of the flow channel. One end of the valve stem is connected to the gate and the other end extends to the outside of the valve body and is connected to the transmission device. The transmission device drives the gate to rise and fall through the valve stem. At least one set of cleaning components is also provided in the flow channel. The cleaning components are movably arranged in the flow channel through a reset component. The cleaning components include a cleaning ring and a cleaning scraper and a cleaning scraper plate disposed on the cleaning ring. The cleaning scraper is attached to the side wall of the gate and the cleaning scraper plate is attached to the inner wall of the flow channel. The cleaning components are also drivenly connected to the gate. When the gate rises or falls, the cleaning ring simultaneously drives the cleaning scraper and the cleaning scraper plate to move.

[0006] The cleaning ring is provided with at least one cleaning scraper and several cleaning scrapers. The cleaning scraper and cleaning scrapers are respectively located at both ends of the cleaning ring. Several cleaning scrapers are evenly spaced around the edge of the cleaning ring away from the gate, and each cleaning scraper is in contact with the inner wall of the flow channel. When the gate is rising or falling, the cleaning ring drives the cleaning scraper and cleaning scrapers to move back and forth along the axial direction of the flow channel.

[0007] The cleaning scraper has a ring-shaped structure, and both the inner and outer edges of the cleaning scraper are provided with a first oblique scraping surface. The edges of the two first oblique scraping surfaces are collinear to form a ring scraping part. The inner edge of each cleaning scraper is provided with a second oblique scraping surface, and the corresponding edges on both sides of each cleaning scraper are also provided with a third oblique scraping surface. The inclination angle of the third oblique scraping surface is greater than that of the second oblique scraping surface.

[0008] The valve body is connected to a pipe on each side of the flow channel corresponding to the gate. The outer wall of the cleaning ring has a protruding limit ring. The inner edge of the pipe is provided with a ring groove for the limit ring to be embedded. The reset component is also set in the ring groove. The reset component includes a disc spring. The disc spring abuts against the side wall of the limit ring away from the gate.

[0009] The valve body also has a movable cavity for raising and lowering the gate. The flow channel has a circular cross-section, and the movable cavity has a rectangular cross-section. The bottom of the movable cavity is also provided with a flow guiding component. The flow guiding component includes a flow guiding horizontal block and flow guiding inclined blocks disposed at both ends of the flow guiding horizontal block. The height of the flow guiding inclined block is higher than that of the flow guiding horizontal block. When the gate is sealed with the valve seat, the gate abuts against the flow guiding component. When the gate is separated from the valve seat, the end face of the flow guiding horizontal block is flush with the lower edge of the flow channel.

[0010] A set of cleaning components is provided in the flow channels on both sides of the gate. The outer edge of the cleaning scraper is provided with a first inclined scraping surface. Both sides of the guide block are provided with guide inclined surfaces that are adapted to the first inclined scraping surface. When the gate is separated from the valve seat, the guide inclined surface is in contact with the first inclined scraping surface, and the end face of the guide block is flush with the lower edge of the cleaning scraper.

[0011] The outer wall of the guide block is a straight surface that abuts against the inner wall of the movable cavity, and the inner wall of the guide block is an inclined surface that extends to the end face of the guide block. A sand discharge guide groove is also recessed on the inclined surface. The cross-section of the sand discharge guide groove is an isosceles triangle. The two corners of the gate are respectively provided with triangular retaining strips that are adapted to the sand discharge guide groove. When the gate is sealed with the valve seat, the bottom end of the gate abuts against the guide block, and the triangular retaining strips are embedded in the sand discharge guide groove.

[0012] The movable cavity is also equipped with a deformable lifting component. The lifting component drives the flow guiding component to press towards the gate. When the gate is sealed with the valve seat, the gate causes the flow guiding block to separate from the cleaning scraper. When the gate is separated from the valve seat, the lifting component drives the flow guiding block to abut against the cleaning scraper.

[0013] The lifting assembly includes two lifting plates with slots in the middle. The two lifting plates are interlocked through the slots. The width of the slot is greater than the thickness of the lifting plate. The inner wall of one side of the slot is a straight surface and the inner wall of the other side is an abutting slope. The abutting slope is located on the side away from the flow guiding assembly. The two lifting plates form an angle on the sides of the slots respectively. An elastic element is clamped in each of the two angles.

[0014] The elastic element is a spring, and the inner wall of the lifting plate at the corresponding angle is provided with a circular groove for the end of the spring to be inserted. The end of the lifting plate away from the slot is also provided with an anti-wear rounded corner.

[0015] The beneficial effects of this invention are as follows: By setting a cleaning component linked to the gate in the flow channel, when the gate is raised and lowered to open and close, it can synchronously drive the cleaning ring and its cleaning scraper and cleaning scraper to move. This structure enables the cleaning scraper to automatically scrape off the impurities attached to the side wall of the gate, while the cleaning scraper can clean the sediment on the inner wall of the flow channel. This effectively solves the problem of gate jamming or flow channel blockage caused by the accumulation of impurities such as mud, sand and microorganisms in the valve body in the deep sea environment. This ensures the smooth operation of the valve during long-term operation and meets the stringent requirement of 15 to 20 years of maintenance-free operation in the deep sea. It cleverly utilizes the linear motion of the gate itself as the driving force, without the need for an additional power source or complex control system. At the same time, a reset component is set to help the cleaning component return to its initial position, preparing for the scraping during the next gate raising and lowering operation. This realizes the synchronization of the gate valve opening and closing process with the cleaning process, resulting in high efficiency in both transmission and cleaning. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0017] Figure 1 This is a cross-sectional schematic diagram of the present invention; Figure 2 This is a partial cross-sectional view of the valve body of the present invention; Figure 3 This is a partial cross-sectional view of the flow guide block and the cleaning scraper in this invention. Figure 4 This is a schematic diagram of the cleaning component in this invention; Figure 5 This is a schematic diagram of the cleaning component from another perspective in this invention; Figure 6 This is a schematic diagram of the flow guiding component in this invention; Figure 7 This is a partial schematic diagram of the gate in this invention; Figure 8 This is a schematic diagram of the lifting assembly in this invention; Figure 9 This is a schematic diagram of the lifting plate in this invention; In the diagram, 1-valve body, 2-valve seat, 3-gate, 4-valve stem, 5-transmission device, 6-flow channel, 7-cleaning ring, 8-cleaning scraper, 9-cleaning scraper blade, 10-first inclined scraping surface, 11-ring scraping part, 12-second inclined scraping surface, 13-third inclined scraping surface, 14-pipe, 15-limiting ring, 16-ring groove, 17-disc spring, 18-moving cavity, 19-guide block, 20-guide block, 21-guide inclined surface, 22-sand discharge guide channel, 23-triangular retaining strip, 24-slot, 25-lifting plate, 26-yielding straight surface, 27-abutting inclined surface, 28-angle, 29-spring, 30-circular groove, 31-anti-wear rounded corner. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0020] The directional and positional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for illustrating and understanding this invention, and not for limiting the scope of protection of this invention.

[0021] like Figures 1 to 9As shown in the figure, a deep-sea flat gate valve with a sand discharge channel and a cleaning gate structure is provided in one embodiment of the present invention. The valve includes a valve body 1, a valve seat 2, a gate 3, a valve stem 4, and a transmission device 5. The valve body 1 has a flow channel 6. The valve seat 2 and the gate 3 are sealed together inside the valve body 1 to control the opening and closing of the flow channel 6. One end of the valve stem 4 is connected to the gate 3, and the other end extends to the outside of the valve body 1 and is connected to the transmission device 5. The transmission device 5 drives the gate 3 to rise and fall via the valve stem 4. At least one set of cleaning components is also provided inside the flow channel 6. The cleaning components are movably disposed within the flow channel 6 via a reset component. The cleaning components include a cleaning ring 7 and a cleaning scraper 8 and a cleaning scraper blade 9 disposed on the cleaning ring 7. The cleaning scraper 8 is attached to the side wall of the gate 3, and the cleaning scraper blade 9 is attached to the inner wall of the flow channel 6. The cleaning components are also drively connected to the gate 3. When the gate 3 rises or falls, the cleaning ring 7 simultaneously drives the cleaning scraper 8 and the cleaning scraper blade 9 to move.

[0022] The beneficial effects of this design are as follows: By installing a cleaning component linked to the gate within the flow channel, when the gate is raised, lowered, or opened / closed, it synchronously drives the cleaning ring and its cleaning scraper and cleaning blade. This structure allows the cleaning scraper to automatically remove impurities adhering to the side wall of the gate, while the cleaning blade cleans the sediment on the inner wall of the flow channel. This effectively solves the problem of gate jamming or flow channel blockage caused by the accumulation of impurities such as mud, sand, and microorganisms in the valve body in the deep-sea environment. This ensures the smooth operation of the valve during long-term operation and meets the stringent requirement of 15 to 20 years of maintenance-free operation in the deep sea. It cleverly utilizes the linear motion of the gate itself as the driving force, eliminating the need for an additional power source or complex control system. At the same time, a reset component is installed to help the cleaning component return to its initial position, preparing for scraping during the next gate raising, lowering, or opening / closing operation. This achieves synchronization between the gate valve opening / closing process and the cleaning process, resulting in high efficiency in both transmission and cleaning.

[0023] Furthermore, the cleaning ring 7 is provided with at least one cleaning scraper 8 and several cleaning scrapers 9. The cleaning scraper 8 and the cleaning scrapers 9 are respectively disposed at both ends of the cleaning ring 7. Several cleaning scrapers 9 are evenly spaced around the edge of the cleaning ring 7 away from the gate 3, and each cleaning scraper 9 is in contact with the inner wall of the flow channel 6. When the gate 3 is rising or falling, the cleaning ring 7 drives the cleaning scraper 8 and the cleaning scrapers 9 to move back and forth along the axial direction of the flow channel 6.

[0024] The beneficial effects of this design are as follows: By placing the cleaning scraper and cleaning blade at opposite ends of the cleaning ring, the cleaning operation for the gate and the cleaning operation for the inner wall of the flow channel are clearly separated in space. This structural design avoids secondary contact between impurities scraped from the inner wall of the flow channel and the gate sealing surface, preventing cross-transmission of contaminants and especially protecting the cleanliness of the gate sealing surface. By evenly spaced cleaning scrapers around the edge of the cleaning ring away from the gate, a ring-shaped, fully enclosed cleaning structure for the inner wall of the flow channel is formed. When the cleaning ring moves back and forth, the multiple scrapers work together to evenly and thoroughly clean the entire inner wall of the flow channel, significantly improving the removal effect and efficiency of flow channel deposits. The evenly spaced arrangement of the cleaning scrapers ensures that the cleaning ring is subjected to balanced force when moving back and forth along the axial direction of the flow channel, which can smoothly guide the movement of the cleaning components, reduce the risk of uneven wear or jamming, and ensure the reliability of the cleaning action and the consistency of scraper wear during long-term operation.

[0025] Further, the cleaning scraper 8 has a ring-shaped structure, and both the inner and outer edges of the cleaning scraper 8 are provided with a first inclined scraping surface 10. The edges of the two first inclined scraping surfaces 10 are collinear to form a ring scraping part 11. The inner edge of each cleaning scraper 9 is provided with a second inclined scraping surface 12, and the corresponding edges on both sides of each cleaning scraper 9 are also provided with a third inclined scraping surface 13. The inclination angle of the third inclined scraping surface 13 is greater than that of the second inclined scraping surface 12.

[0026] The beneficial effects of this design are as follows: By setting a first inclined scraping surface on both the inner and outer edges of the cleaning scraper, and making the edges of the two inclined surfaces collinear to form a ring scraping part, the ring scraping part can effectively scrape off the deposits on both sides of the gate in a line contact manner when the scraper reciprocates, regardless of whether the gate rises or falls, achieving bidirectional and efficient cleaning. The second inclined scraping surface set on the inner edge of the cleaning scraper is used for the main scraping, while the third inclined scraping surface set on both sides with a larger inclination angle constitutes a lateral slag discharge channel. This angle difference design can guide the scraped impurities to flow quickly to both sides, avoiding the accumulation of impurities in front of the scraper, ensuring the continuous cleaning ability of the scraper during long-stroke reciprocating motion, and at the same time achieving the effect of graded scraping. The second inclined scraping surface with a smaller angle can be used to closely fit the inner wall for fine scraping, while the third inclined scraping surface with a larger angle can provide greater tangential force to break down more stubborn deposits, protecting the coating on the inner wall of the flow channel while ensuring the ability to clean stubborn stains.

[0027] Further configuration: the valve body 1 is connected to a pipe 14 on each of the flow channels 6 on both sides of the gate 3; the outer wall of the cleaning ring 7 has a protruding limit ring 15; the inner edge of the pipe 14 is provided with an annular groove 16 for the limit ring 15 to be embedded; the reset assembly is also provided in the annular groove 16; the reset assembly includes a disc spring 17; the disc spring 17 abuts against the side wall of the limit ring 15 away from the gate 3.

[0028] The beneficial effects of this design are as follows: By setting a limiting ring on the outer wall of the cleaning ring and opening a corresponding annular groove on the inner edge of the pipe, the two work together to form a stable axial guide structure. This design not only limits the radial sway of the cleaning ring, ensuring that the scraper and scraper blade always maintain precise contact with the cleaning surface, but also limits the maximum stroke range of the cleaning components. When the gate rises and pushes open the cleaning ring, the disc spring is compressed and stores energy; when the gate descends and retracts, the disc spring automatically pushes the cleaning ring to reset, keeping the scraper in close contact with the gate at all times. This achieves an automatic follow-up reset function without additional power. Using a disc spring as the reset element can provide a large and stable reset force within a limited space, ensuring that the cleaning ring can still reliably reset in the high-pressure environment of the deep sea, overcoming the problem that reset failure may occur due to water pressure or impurity resistance in the deep sea environment.

[0029] Furthermore, the valve body 1 is provided with a movable cavity 18 for the gate 3 to move up and down. The flow channel 6 has a circular cross-section, and the movable cavity 18 has a rectangular cross-section. The bottom of the movable cavity 18 is also provided with a flow guiding component. The flow guiding component includes a flow guiding block 19 and flow guiding inclined blocks 20 disposed at both ends of the flow guiding block 19. The height of the flow guiding inclined blocks 20 is higher than that of the flow guiding block 19. When the gate 3 is sealed with the valve seat 2, the gate 3 abuts against the flow guiding component. When the gate 3 is separated from the valve seat 2, the end face of the flow guiding block 19 is flush with the lower edge of the flow channel 6.

[0030] The beneficial effects of this design are as follows: By setting a flow guide component at the bottom of the square movable cavity and aligning the end face of the flow guide block with the lower edge of the circular flow channel after the gate is opened, the steps and pits caused by abrupt changes in cross-sectional shape are eliminated. This smooth transition structure avoids the generation of eddies and turbulence, significantly reducing the pressure loss of fluid passing through the valve. The height of the flow guide block is higher than that of the flow guide block, forming a flow guide slope from high to low. This structure can guide the fluid as it passes through, directing impurities that may enter the bottom of the movable cavity to the main flow channel, preventing impurities from accumulating in the dead corners of the square cavity for a long time, and further enhancing the valve's anti-clogging ability. When the gate descends to the closed position and seals with the valve seat, the bottom of the gate abuts against the flow guide component. This design provides stable bottom support for the gate, resisting the bending deformation of the gate caused by the medium pressure, and helping to maintain the parallelism between the gate and the valve seat, thereby protecting the long-term reliability of the sealing pair.

[0031] In a further configuration, a set of cleaning components is provided in the flow channels 6 on both sides of the gate plate 3. The outer edge of the cleaning scraper 8 is provided with a first inclined scraping surface 10. Both sides of the guide block 19 are provided with guide inclined surfaces 21 that are adapted to the first inclined scraping surface 10. When the gate plate 3 is separated from the valve seat 2, the guide inclined surface 21 is in contact with the first inclined scraping surface 10, and at the same time, the end face of the guide block 19 is flush with the lower edge of the cleaning scraper 8.

[0032] The beneficial effects of this design are as follows: When the gate is opened, the guide slope fits into the first inclined scraping surface of the cleaning scraper, and the end face of the guide block is flush with the lower edge of the cleaning scraper. This design integrates the scraper position, which may have previously had steps, with the guide structure, forming a continuous and smooth flow channel surface. This eliminates structural abrupt changes and deposition dead zones when the fluid passes through the cleaning component. The guide slope and the first inclined scraping surface in the fitted state form a closed transition interface, which can effectively prevent impurities in the fluid from entering the gap between the cleaning ring and the guide block, preventing fine particles from intruding into the active cavity or the reset component area, reducing the risk of jamming. The fitting fit between the guide slope and the first inclined scraping surface provides a precise reset positioning reference for the cleaning ring when the gate is open. Combined with the reset action of the disc spring, this ensures that the cleaning scraper can accurately return to the ready position flush with the guide block each time, making precise preparations for the cleaning action when the gate is closed next time.

[0033] Further configuration: the outer wall of the guide block 20 is a straight surface that abuts against the inner wall of the movable cavity 18, and the inner wall of the guide block 20 is an inclined surface that extends to the end face of the guide block 19. A sand discharge guide groove 22 is also recessed on the inclined surface. The cross-section of the sand discharge guide groove 22 is an isosceles triangle. The two corners of the gate plate 3 are respectively provided with triangular retaining strips 23 that are adapted to the sand discharge guide groove 22. When the gate plate 3 and the valve seat 2 are sealed together, the bottom end of the gate plate 3 abuts against the guide block 19, and the triangular retaining strips 23 are embedded in the sand discharge guide groove 22.

[0034] The beneficial effects of this design are as follows: When the gate is closed, the bottom of the gate abuts against the guide block to form the first support seal. Simultaneously, the triangular retaining strip is precisely embedded in the sand-discharging guide groove, which has an isosceles triangular cross-section. This wedge-shaped fit structure constitutes the second labyrinth seal, effectively preventing impurities in the flow channel from entering the deep part of the active cavity through the gap between the guide block and the gate. The isosceles triangular retaining strip and the guide groove gradually engage in the later stages of the gate's descent. Its symmetrical inclined structure automatically corrects minor deflections of the gate, guiding it to precise alignment and ensuring the gate and the two... The side valve seat fits evenly, improving the fitting accuracy and sealing reliability of the sealing pair. The sand discharge guide groove adopts an isosceles triangular cross section. Its recessed space is not completely filled by the retaining strip when the gate is closed, and a slag-holding gap is naturally formed on both sides. Even if a small amount of fine particulate impurities are brought in with the gate, they can be temporarily stored in the guide groove, avoiding the impurities being directly pressed into the sealing surface and causing damage. When the gate is opened again, these impurities can be discharged with the fluid through the inclined surface of the guide block. The straight surface design of the outer wall of the guide block abutting the inner wall of the moving cavity restricts the guide assembly to move only in the direction of the gate.

[0035] Furthermore, the movable cavity 18 is also provided with a deformable lifting component. The lifting component drives the flow guiding component to press towards the gate 3. When the gate 3 is sealed with the valve seat 2, the gate 3 causes the flow guiding block 19 to separate from the cleaning scraper 8. When the gate 3 is separated from the valve seat 2, the lifting component drives the flow guiding block 19 to abut against the cleaning scraper 8.

[0036] The beneficial effects of this design are as follows: By incorporating a deformable lifting component, the flow guide component descends when the gate is closed, actively separating the flow guide block from the cleaning scraper. This design provides ample space for the gate to descend, preventing the flow guide block and cleaning scraper from being forcibly squeezed during the gate's clamping process, thus preventing the scraper from deforming or being damaged due to excessive pressure. When the gate opens, the lifting component immediately raises the flow guide block and re-engages with the cleaning scraper. This active reset, combined with the passive reset of the disc spring, ensures that the flow guide slope and the first inclined scraper surface can return to a precise fit each time the gate opens, guaranteeing that the smooth flow channel structure formed by the cleaning component and the flow guide component can be repeatedly established. The deformable nature of the lifting component allows it to automatically adjust the height of the flow guide component according to the actual position of the gate, protecting the cleaning scraper when the gate is closed and sealing the gap when the gate is open. This adaptive adjustment mechanism ensures that the valve maintains the optimal flow channel shape and sealing fit under different operating conditions.

[0037] Further, the lifting assembly includes two lifting plates 25 with slots 24 in the middle. The two lifting plates 25 are interlocked through the slots 24. The width of the slots 24 is greater than the thickness of the lifting plates 25. The inner wall of one side of the slot 24 is a straight surface 26, and the inner wall of the other side is an abutting slope 27. The abutting slope 27 is located on the side away from the flow guiding assembly. The positions of the two lifting plates 25 corresponding to the two sides of the slots 24 respectively form an included angle 28. An elastic element is clamped in each of the two included angles 28.

[0038] The beneficial effects of this design are as follows: The slot width is greater than the plate thickness, and the differentiated design of one straight side and one inclined side allows the two lifting plates to rotate relative to each other under pressure, preventing lateral shift or twisting. This structure allows the flow guiding assembly to adaptively adjust its posture during gate closure, ensuring uniform force distribution when the flow guiding block separates from the cleaning scraper and avoiding jamming. Two elastic elements are respectively clamped within the two included angles formed by the intersection of the lifting plates, applying bidirectional preload to both lifting plates simultaneously. This design ensures the lifting assembly remains in a stable force balance state. Regardless of whether the flow guiding assembly rises or falls, the elastic elements provide continuous and uniform reset thrust. The cross-interlocking plate structure achieves lifting functionality within a limited movable cavity space. Simultaneously, the design of the slot and elastic elements enhances the overall load-bearing capacity, reliably supporting the flow guiding assembly and withstanding the impact load when the gate closes.

[0039] Further, the elastic element is a spring 29, and the inner wall of the lifting plate 25 corresponding to the included angle 28 is provided with a circular groove 30 for the end of the spring 29 to be inserted, and the end of the lifting plate 25 away from the slot 24 is also provided with an anti-wear rounded corner 31.

[0040] The beneficial effects of this design are as follows: By setting a circular groove on the inner wall of the lifting plate's angle, the end of the spring can be stably embedded. This design effectively prevents the spring from radially slipping or coming out during repeated compression and reset, ensuring that the elastic element is always in the designed working position and improving the long-term reliability of the lifting assembly. The anti-wear rounded corners set at the end of the lifting plate can smoothly contact the inner wall of the moving cavity or other adjacent parts during the lifting of the guide assembly. This structure avoids scratches or damage that may be caused by sharp edges, reduces movement resistance, and extends the service life of the lifting plate and contact parts.

[0041] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A deep-sea flat gate valve with a sand discharge channel and a cleaning gate structure, comprising a valve body (1), a valve seat (2), a gate (3), a valve stem (4), and a transmission device (5), wherein the valve body (1) is provided with a flow channel (6), the valve seat (2) and the gate (3) are sealed and fitted inside the valve body (1) to control the opening and closing of the flow channel (6), one end of the valve stem (4) is connected to the gate (3), and the other end extends to the outside of the valve body (1) and is connected to the transmission device (5), wherein the transmission device (5) drives the gate (3) to rise and fall through the valve stem (4), characterized in that: At least one set of cleaning components is provided in the flow channel (6). The cleaning components are movably set in the flow channel (6) through a reset component. The cleaning components include a cleaning ring (7) and a cleaning scraper (8) and a cleaning scraper (9) set on the cleaning ring (7). The cleaning scraper (8) is in contact with the side wall of the gate (3), and the cleaning scraper (9) is in contact with the inner wall of the flow channel (6). The cleaning components are also connected to the gate (3) in a transmission manner. When the gate (3) rises or falls, the cleaning ring (7) simultaneously drives the cleaning scraper (8) and the cleaning scraper (9) to move.

2. The deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 1, characterized in that: The cleaning ring (7) is provided with at least one cleaning scraper (8) and several cleaning scrapers (9). The cleaning scraper (8) and the cleaning scraper (9) are respectively provided at both ends of the cleaning ring (7). Several cleaning scrapers (9) are evenly spaced around the edge of the cleaning ring (7) away from the gate (3), and each cleaning scraper (9) is in contact with the inner wall of the flow channel (6). When the gate (3) is rising or falling, the cleaning ring (7) drives the cleaning scraper (8) and the cleaning scraper (9) to move back and forth along the axial direction of the flow channel (6).

3. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 2, characterized in that: The cleaning scraper (8) has a ring structure, and the inner and outer edges of the cleaning scraper (8) are provided with a first oblique scraping surface (10). The edges of the two first oblique scraping surfaces (10) are collinear to form a ring scraping part (11). The inner edge of each cleaning scraper (9) is provided with a second oblique scraping surface (12), and the corresponding edges on both sides of each cleaning scraper (9) are also provided with a third oblique scraping surface (13). The inclination angle of the third oblique scraping surface (13) is greater than that of the second oblique scraping surface (12).

4. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 3, characterized in that: The valve body (1) is connected to a pipe (14) on each side of the flow channel (6) corresponding to the gate (3). The outer wall of the cleaning ring (7) has a protruding limit ring (15). The inner edge of the pipe (14) is provided with an annular groove (16) for the limit ring (15) to be embedded. The reset component is also set in the annular groove (16). The reset component includes a disc spring (17). The disc spring (17) abuts against the side wall of the limit ring (15) away from the gate (3).

5. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 1, characterized in that: The valve body (1) is also provided with a movable cavity (18) for the gate (3) to move up and down. The cross-section of the flow channel (6) is circular, and the cross-section of the movable cavity (18) is rectangular. The bottom of the movable cavity (18) is also provided with a flow guiding component. The flow guiding component includes a flow guiding block (19) and flow guiding inclined blocks (20) set at both ends of the flow guiding block (19). The height of the flow guiding inclined block (20) is higher than that of the flow guiding block (19). When the gate (3) is sealed with the valve seat (2), the gate (3) abuts against the flow guiding component. When the gate (3) is separated from the valve seat (2), the end face of the flow guiding block (19) is flush with the lower edge of the flow channel (6).

6. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 5, characterized in that: A set of cleaning components is provided in the flow channels (6) on both sides of the gate (3). The outer edge of the cleaning scraper (8) is provided with a first inclined scraping surface (10). Both sides of the guide block (19) are provided with guide inclined surfaces (21) that are adapted to the first inclined scraping surface (10). When the gate (3) is separated from the valve seat (2), the guide inclined surface (21) is in contact with the first inclined scraping surface (10), and at the same time, the end face of the guide block (19) is flush with the lower edge of the cleaning scraper (8).

7. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 6, characterized in that: The outer wall of the guide block (20) is a straight surface that abuts against the inner wall of the movable cavity (18), and the inner wall of the guide block (20) is an inclined surface that extends to the end face of the guide block (19). The inclined surface is also recessed with a sand discharge guide groove (22). The cross section of the sand discharge guide groove (22) is an isosceles triangle. The two corners of the gate (3) are respectively provided with triangular retaining strips (23) that are adapted to the sand discharge guide groove (22). When the gate (3) is sealed with the valve seat (2), the bottom end of the gate (3) abuts against the guide block (19), and the triangular retaining strips (23) are embedded in the sand discharge guide groove (22).

8. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 7, characterized in that: The movable cavity (18) is also provided with a deformable lifting component. The lifting component drives the flow guiding component to squeeze towards the gate (3). When the gate (3) is sealed with the valve seat (2), the gate (3) causes the flow guiding block (19) to separate from the cleaning scraper (8). When the gate (3) is separated from the valve seat (2), the lifting component drives the flow guiding block (19) to abut against the cleaning scraper (8).

9. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 8, characterized in that: The lifting assembly includes two lifting plates (25) with slots (24) in the middle. The two lifting plates (25) are interlocked through the slots (24). The width of the slots (24) is greater than the thickness of the lifting plates (25). The inner wall of one side of the slots (24) is a straight surface (26) and the inner wall of the other side is an abutting slope (27). The abutting slope (27) is located on the side away from the flow guide assembly. The two lifting plates (25) form an angle (28) on the sides of the slots (24) respectively. An elastic element is clamped in each of the two angles (28).

10. A deep-sea flat gate valve with a sand discharge guide channel and a cleaning gate structure according to claim 9, characterized in that: The elastic element is a spring (29), and the inner wall of the lifting plate (25) corresponding to the included angle (28) is provided with a circular groove (30) for the end of the spring (29) to be inserted, and the end of the lifting plate (25) away from the slot (24) is also provided with an anti-wear rounded corner (31).

Images