Turnover type floating ball valve

Abstract

The invention relates to the technical field of floating ball valves and discloses an overturning type floating ball valve which comprises a valve body, a valve cover and a liquid outlet pipe, a liquid inlet pipe is fixedly connected to the end, away from the liquid outlet pipe, of the valve body, a collecting box is fixedly connected to the bottom face of the outer wall of the liquid inlet pipe, and an outer slag falling opening and an inner slag falling opening are formed in the side, close to the collecting box, of the liquid inlet pipe in a penetrating mode. The inner wall of the liquid inlet pipe is provided with a rotating cavity, the inner wall of the rotating cavity is connected with an inner cleaning assembly and a filtering assembly, and the inner cleaning assembly is connected with the adjacent end of the filtering assembly; the end, away from the inner cleaning assembly, of the filtering assembly penetrates through the inner wall of the liquid inlet pipe to the outside of the liquid inlet pipe and is connected with a transmission assembly, and the other end of the transmission assembly is connected with a moving assembly. According to the overturning type floating ball valve, the filtering assembly is arranged in the liquid inlet pipe of the valve body, so that a medium circulating in the valve body can be filtered, and the situation that solid impurities are accumulated between the valve cavity of the valve body and the ball body, and consequently the valve cavity and the ball body are clamped is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of floating ball valves, and more specifically to a flip-type floating ball valve. Background Art

[0002] In a floating ball valve, the ball is not fixed but can move slightly under the action of the medium pressure. When the valve is closed, the medium pressure will push the ball towards the downstream seat, causing a tight contact between the ball and the seat, thereby achieving a good sealing effect.

[0003] Currently, the patent with the publication number CN106122510B, an upper-mounted cryogenic floating ball valve, includes a valve body, a ball, and a seat assembly. The ball is disposed within the valve body, and the seat assembly is disposed between the ball and the valve body. Valve seat assemblies are provided both upstream and downstream of the ball; the seat assembly includes a seat inner ring, a seat, and a seat support. The seat is sleeved on the seat inner ring, and the seat support is sleeved on the seat. The seat support and the seat inner ring protect the seat, preventing the seat from being deformed under the pressure of the medium, improving the sealing reliability of the valve, and extending the service life of the valve.

[0004] However, since the ball of the floating ball valve is not fixed, there is a gap between the ball and the valve cavity. Some media using floating ball valves may contain a part of solid impurities (including rust or metal chips generated during manufacturing, installation, and maintenance, and ice crystals formed by freezing of moisture in the medium raw materials at low temperatures, etc.). These solid impurities are very likely to accumulate at the gap between the ball and the valve cavity during the closing of the ball valve, thereby causing jamming between the ball and the seat, and even resulting in the valve being unable to be opened or closed normally. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a flip-type floating ball valve, which can avoid the accumulation of solid impurities in the valve cavity.

[0006] To achieve the above object, the present invention provides the following technical solution: a flip - type floating ball valve, which includes a valve body, a valve cover installed at the upper end of the valve body, and a liquid outlet pipe installed on one side of the valve body. One end of the valve body far from the liquid outlet pipe is fixedly connected with a liquid inlet pipe. A collecting box is fixedly connected to the bottom surface of the outer wall of the liquid inlet pipe. An outer slag - dropping port and an inner slag - dropping port are respectively and penetratingly opened on one side of the liquid inlet pipe close to the collecting box. Both the outer slag - dropping port and the inner slag - dropping port are communicated with the inside of the collecting box. A rotating cavity is opened on the inner wall of the liquid inlet pipe. An inner cleaning component and a filtering component are connected to the inner wall of the rotating cavity. One end of the inner cleaning component adjacent to the filtering component is connected. One end of the filtering component far from the inner cleaning component penetrates through the inner wall of the liquid inlet pipe to the outside of the liquid inlet pipe and is connected with a transmission component. The other end of the transmission component is connected with a moving component. The other end of the moving component penetrates through the outer wall of the collecting box to the inside of the collecting box and is connected with a shielding component. Both ends of the shielding component are respectively aligned with the outer slag - dropping port and the inner slag - dropping port in a matching manner. The inside of the filtering component is matched with the inner slag - dropping port. An outer scraping strip is fixedly connected to the inner wall of the liquid inlet pipe, and the outer scraping strip is matched with the outside of the filtering component.

[0007] Further, the filtering component includes a rotating rod, a handwheel, a drum filter screen, a support plate, and a support ring. One end of the drum filter screen is fixedly connected to the side wall of the support plate. The other side of the support plate is fixedly connected to one end of the rotating rod. The other end of the rotating rod penetrates through the inner wall of the liquid inlet pipe to the outside of the liquid inlet pipe and is fixedly connected to the middle of the handwheel. And one end of the rotating rod located outside the liquid inlet pipe is connected with the transmission component. One end of the drum filter screen far from the support plate is fixedly connected to one side of the support ring. The inner wall of the support ring is connected with the inner cleaning component. The outer walls of the drum filter screen, the support plate, and the support ring are all rotatably connected to the inner wall of the rotating cavity. The inner cleaning component is located inside the drum filter screen. Openings are penetratingly opened on the surface of the drum filter screen, and the openings are matched with the inner slag - dropping port in size. One side of the outer scraping strip abuts against the outer side wall of the drum filter screen.

[0008] Further, the transmission component includes a protective cover, a chain, a driving sprocket, and a driven sprocket. The driving sprocket is sleeved and fixedly connected to the outer wall of one end of the rotating rod located outside the liquid inlet pipe. The inside of the driven sprocket is connected with one end of the moving component located outside the liquid inlet pipe. The chain is sleeved outside the driving sprocket and the driven sprocket, and the chain meshes with both the driving sprocket and the driven sprocket. The side wall of the protective cover is fixedly connected to the outer walls of the liquid inlet pipe and the collecting box. The chain, the driving sprocket, and the driven sprocket are all located inside the protective cover.

[0009] Further, the moving component includes a transmission rod, a gear, and a rack plate. One end of the transmission rod is fixedly connected to the inner wall of the driven sprocket. The other end of the transmission rod penetrates through the outer wall of the collecting box to the inside of the collecting box and is fixedly connected to the inner wall of the gear. And the outer wall of the transmission rod is rotatably connected to the inner wall of the collecting box at the penetration part. One end of the rack plate is connected with the shielding component, and the rack plate meshes with the gear.

[0010] Further, the shielding component includes an outer baffle, a partition mesh plate, and an inner baffle. One side of the partition mesh plate is fixedly connected to one end of the rack plate, and the other side of the partition mesh plate is fixedly connected to one end of the inner baffle. An alignment opening is formed through the upper surface of the inner baffle near one end of the partition mesh plate. The upper surface of the inner baffle is aligned with the inner slag discharge opening, and the width of the remaining part of the inner baffle without the alignment opening is not less than the width of the inner slag discharge opening. The side wall at the lower end of the partition mesh plate is slidably connected to the inner wall of the collection box, and the side wall at the upper end of the partition mesh plate is slidably connected to the inner wall of the outer slag discharge opening. The upper surface of the partition mesh plate is fixedly connected to the bottom surface of one end of the outer baffle. One side of the outer baffle close to the partition mesh plate abuts against the side of the outer scraping strip away from the drum filter screen. The movable distance of the outer baffle is not less than the width of the outer slag discharge opening, and the width of the alignment opening is not less than the width between the inner slag discharge opening and the outer slag discharge opening.

[0011] Further, the inner cleaning component includes a fixing plate, a support rod, and two scraping components. One side of the fixing plate is fixedly connected to the inner wall of the rotation cavity away from one end of the support plate, and the other side of the fixing plate is fixedly connected to one end of the support rod. The side wall of the support rod is connected to the two scraping components. The support rod and the two scraping components are both located inside the drum filter screen. The outer wall of the fixing plate is rotatably connected to the inner wall of the support ring. The two scraping components are symmetrically arranged with the support rod as the axis.

[0012] Further, both of the two scraping components include an inner scraping strip and two extension rods. One end of each of the two extension rods is fixedly connected to the side wall of the support rod, and the other end of each of the two extension rods is fixedly connected to one side of the inner scraping strip. The other side of the inner scraping strip is slidably connected to the inner wall of the drum filter screen, and one of the inner scraping strips is located on one side above the inner slag discharge opening.

[0013] Further, a pull rod is fixedly connected to the side of the handwheel away from the rotating rod. Support blocks are fixedly connected to the upper surface and the bottom surface of the outer wall of the liquid inlet pipe. Limiting L-shaped rods are fixedly connected to the inner walls of the two support blocks. The two limiting L-shaped rods are respectively located on the upper and lower sides of the handwheel, and the other ends of the two limiting L-shaped rods are matched with the side wall of the pull rod.

[0014] Further, a drain pipe and a slag discharge pipe are fixedly connected and communicated with the bottom surface of the collection box. The end of the drain pipe away from the collection box is tightly and hermetically connected with a drain pipe flange, and the end of the slag discharge pipe away from the collection box is tightly and hermetically connected with a slag discharge pipe flange.

[0015] Further, a pressure sensor is fixedly connected to the inner wall of the collection box near one end of the inner slag discharge opening, and a flow rate sensor is fixedly connected to the inner wall of the liquid inlet pipe. The flow rate sensor is located between the drum filter screen and the valve body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The flip - type floating ball valve can filter the medium flowing inside by arranging a filtering component in the liquid inlet pipe of the valve body, so as to prevent solid impurities from accumulating between the valve cavity of the valve body and the ball, causing jamming of the valve cavity and the ball.

[0018] 2. For the flip - type floating ball valve, by arranging one end of the filtering component outside the liquid inlet pipe, setting an outer scraping strip inside the liquid inlet pipe, and arranging an inner cleaning component inside the filtering component, after the filtering component is used for a period of time, the filtering component can be rotated, and the self - cleaning of the filtering component can be realized through the outer scraping strip and the inner cleaning component, improving the filtering effect.

[0019] 3. The flip - type floating ball valve can collect the solid impurities scraped off by the outer scraping strip and the inner cleaning component by arranging a collection box below the liquid inlet pipe. This can not only avoid secondary pollution to the filtering component but also facilitate unified treatment later.

[0020] 4. The flip - type floating ball valve can open the outer slag - falling port and the inner slag - falling port between the collection box and the filtering component when cleaning the filtering component by arranging a moving component and a shielding component inside the collection box; when cleaning is not required, the outer slag - falling port and the inner slag - falling port can be closed to prevent the impurities inside the collection box from overflowing.

[0021] 5. The flip - type floating ball valve can, when rotating the filtering component for self - cleaning, also control the shielding component to move through the moving component by arranging a transmission component between one end of the filtering component and the moving component located outside the feed pipe and the collection box, thereby reducing the operation steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall external view schematic diagram of the present invention;

[0023] Figure 2 is the exploded schematic diagram of the valve body and the liquid inlet pipe of the present invention;

[0024] Figure 3 is the sectional three - dimensional schematic diagram of the liquid inlet pipe of the present invention;

[0025] Figure 4 is of the present invention Figure 3 the exploded schematic diagram of each component;

[0026] Figure 5 is another sectional three - dimensional schematic diagram of the liquid inlet pipe of the present invention;

[0027] Figure 6 is of the present invention Figure 5 the exploded schematic diagram of each component;

[0028] Figure 7This is a detailed connection diagram of components such as the filtration component, transmission component, and moving component of the present invention;

[0029] Figure 8 This is a further enlarged schematic diagram of the transmission component and the moving component of the present invention;

[0030] Figure 9 This is a detailed connection diagram of the filtration component and the internal cleaning component of the present invention;

[0031] Figure 10 For the present invention Figure 9 exploded view of each component.

[0032] In the figure: 1, valve body; 2, valve cover; 3, liquid outlet pipe; 4, liquid inlet pipe; 5, support block; 6, limiting L-shaped rod; 7, rotating rod; 8, handwheel; 9, collection box; 10, protective cover; 11, pull rod; 12, drain pipe flange; 13, slag discharge pipe flange; 14, pressure sensor; 15, flow rate sensor; 16, drum filter screen; 17, support plate; 18, support ring; 19, chain; 20, outer baffle; 21, outer slag outlet; 22, outer scraping strip; 23, rotating cavity; 24, inner slag outlet; 25, driving sprocket; 26, driven sprocket; 27, transmission rod; 28, partition mesh plate; 29, gear; 30, rack plate; 31, inner baffle; 32, alignment port; 33, opening; 34, fixing plate; 35, support rod; 36, extension rod; 37, inner scraping strip. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] Please refer to Figures 1 - 10, The flip - type floating ball valve includes a valve body 1, a valve cover 2 installed at the upper end of the valve body 1, and a liquid outlet pipe 3 installed on one side of the valve body 1. One end of the valve body 1 far from the liquid outlet pipe 3 is fixedly connected with a liquid inlet pipe 4. The bottom surface of the outer wall of the liquid inlet pipe 4 is fixedly connected with a collection box 9. One side of the liquid inlet pipe 4 close to the collection box 9 is penetrated and provided with an outer slag - falling port 21 and an inner slag - falling port 24. Both the outer slag - falling port 21 and the inner slag - falling port 24 are communicated with the inside of the collection box 9. The inner wall of the liquid inlet pipe 4 is provided with a rotating cavity 23. The inner wall of the rotating cavity 23 is connected with an inner cleaning component and a filtering component. One end of the inner cleaning component adjacent to the filtering component is connected. One end of the filtering component far from the inner cleaning component penetrates the inner wall of the liquid inlet pipe 4 to the outside of the liquid inlet pipe 4 and is connected with a transmission component. The other end of the transmission component is connected with a moving component. The other end of the moving component penetrates the outer wall of the collection box 9 to the inside of the collection box 9 and is connected with a shielding component. Both ends of the shielding component are respectively aligned with and matched with the outer slag - falling port 21 and the inner slag - falling port 24. The inside of the filtering component is matched with the inner slag - falling port 24. The inner wall of the liquid inlet pipe 4 is fixedly connected with an outer scraping strip 22. The outer scraping strip 22 is matched with the outside of the filtering component.

[0035] The flip - type floating ball valve in the present invention is similar in structure to the existing floating ball valve, such as an upper - mounted floating ball valve disclosed in the patent with the publication number CN106122510B. As Figures 1 to 10 shown, when the flip - type floating ball valve in the present invention is in use, it can be carried out according to the following steps:

[0036] 1. When the valve body 1 is in normal use, the connection inside the liquid inlet pipe 4 and the liquid outlet pipe 3 of the valve body 1 is in a flowing state. At this time, the flowing medium will pass through the filtering component inside the liquid inlet pipe 4. At this time, the solid impurities in the medium will be blocked by the filtering component, and the clean liquid will continue to flow until it passes through the valve body 1 and is transmitted from the liquid outlet pipe 3.

[0037] 2. During the flow of the medium, impurities will gradually accumulate on the surface of the filtering component. At this time, during regular maintenance, the end of the filtering component outside the liquid inlet pipe 4 can be manually rotated counter - clockwise.

[0038] 3. During the rotation of the filtering component, it will rotate in the rotating cavity 23 by itself, and then the side that was originally in direct contact with the flowing medium inside the liquid inlet pipe 4 can be rotated downward.

[0039] 4. And while the filtering component is rotating, the end of the filtering component outside the feed pipe 4 will also drive the transmission component to rotate together.

[0040] 5. After the transmission component rotates, it will drive the end of the moving component outside the collection box 9 to rotate together, and at the same time, the part inside the collection box 9 will also rotate synchronously.

[0041] 6. After the moving component located inside the collection box 9 rotates, it can drive the shielding component to move within the outer slag discharge opening 21 and the inner slag discharge opening 24 between the collection box 9 and the liquid inlet pipe 4. During the movement, the outer slag discharge opening 21 and the inner slag discharge opening 24 are exposed.

[0042] 7. While the outer slag discharge opening 21 and the inner slag discharge opening 24 are exposed, the rotation of the filter component located above the outer slag discharge opening 21 and the inner slag discharge opening 24 will contact the outer scraping strip 22. At the same time, the inner cleaning component located inside the filter component will contact the inside of the filter component, realizing the simultaneous cleaning of the inner and outer sides of the filter component.

[0043] 8. While the outer scraping strip 22 contacts the outside of the filter component, it will scrape off the solid impurities adhering to the outside of the filter component, and when the outer slag discharge opening 21 is opened, it will just fall inside the collection box 9.

[0044] 9. While the inner cleaning component contacts the inside of the filter component, it will also scrape off the impurities that may adhere to the inside of the filter component. And when the filter component rotates 180°, when the filter component matches the inner slag discharge opening 24, this part of the impurities will fall into the collection box 9 from the inner slag discharge opening 24.

[0045] 10. Then rotate the filter component clockwise. At this time, the filter component will return to the initial stage again. At the same time, the moving component controls the shielding component to move towards the filter component.

[0046] 11. During the return of the shielding component, it will block the outer slag discharge opening 21 and the inner slag discharge opening 24 again to avoid affecting the subsequent use of the floating ball valve. And when the shielding component returns, it will also push the solid impurities that fell into the collection box 9 before towards the end of the collection box 9 close to the valve body 1. This can not only prevent this part of the impurities from hindering the secondary cleaning, but also facilitate unified treatment during the subsequent overall maintenance of the floating ball valve.

[0047] It should be particularly noted here:

[0048] 1. It should be particularly noted that when rotating the filter component to clean the surface and inside of the filter component, whether to ensure safety or avoid affecting the cleaning effect, it is necessary to close the two medium pipelines at both ends of the valve body 1.

[0049] 2. The above-mentioned valve body 1, valve cover 2 and feed pipe 3 are all internal structures of the existing floating ball valve, so the connection method, positional relationship and working principle are not described in detail here.

[0050] As a preferred embodiment of the present invention, the filtering assembly includes a rotating rod 7, a handwheel 8, a drum filter screen 16, a support plate 17, and a support ring 18. One end of the drum filter screen 16 is fixedly connected to the side wall of the support plate 17. The other side of the support plate 17 is fixedly connected to one end of the rotating rod 7. The other end of the rotating rod 7 penetrates through the inner wall of the liquid inlet pipe 4 to the outside of the liquid inlet pipe 4 and is fixedly connected to the middle of the handwheel 8. And one end of the rotating rod 7 located outside the liquid inlet pipe 4 is connected to the transmission assembly. One end of the drum filter screen 16 away from the support plate 17 is fixedly connected to one side of the support ring 18. The inner wall of the support ring 18 is connected to the inner cleaning assembly. The outer walls of the drum filter screen 16, the support plate 17, and the support ring 18 are all rotatably connected to the inner wall of the rotating cavity 23. The inner cleaning assembly is located inside the drum filter screen 16. An opening 33 is formed through the surface of the drum filter screen 16. The opening 33 is matched in size with the inner slag discharge port 24. One side of the outer scraping strip 22 abuts against the outer side wall of the drum filter screen 16.

[0051] More specifically, during the normal use of the floating ball valve, after the medium enters the liquid inlet pipe 4, it will first come into contact with the side of the drum filter screen 16 away from the valve body 1. Subsequently, the impurities inside the medium are blocked, and the filtered medium will enter the drum filter screen 16, and then be secondarily filtered by the other side of the drum filter screen 16, and finally pass through the inside of the drum filter screen 16 and enter the valve cavity of the valve body 1.

[0052] During the filtering of the drum filter screen 16, most of the impurities inside the medium will be located on the side of the drum filter screen 16 away from the valve body 1 (i.e., the outer side wall of the drum filter screen 16). At the same time, there may also be a small part of the impurities located inside the drum filter screen 16. When it is necessary to clean the impurities, only need to rotate the handwheel 8. The handwheel 8 drives the rotating rod 7 to rotate. Then the rotating rod 7 drives the transmission assembly and the support plate 17 to rotate at the same time. Subsequently, the support plate 17 can drive the drum filter screen 16 and the support ring 18 to rotate together in the rotating cavity 23, so as to cooperate with the outer scraping strip 22 and the inner cleaning assembly to clean the outside and inside of the drum filter screen 16 at the same time.

[0053] It should be particularly noted here that:

[0054] 1. Since the rotation of the drum filter screen 16 is 180° and it rotates back and forth, the orientation of the drum filter screen 16 always remains the same. Therefore, the drum filter screen 16 can also be set as a filter cylinder with two pore sizes according to requirements, which can facilitate double filtration. For example, the pore size of the part away from the valve body 1 is slightly larger to filter larger impurities (such as ice crystals), and the part closer to the valve body 1 is set with a slightly smaller pore size to filter tiny impurities. No specific limitation is made here.

[0055] 2. The handwheel 8 and the rotating rod 7 can also be locked by the locking mechanism of the existing floating ball valve, and only opened during cleaning, so as to avoid accidental mis-touching and affecting the filtering effect of the drum filter screen 16.

[0056] As a preferred embodiment of the present invention, the transmission assembly includes a protective cover 10, a chain 19, a driving sprocket 25 and a driven sprocket 26. The driving sprocket 25 is sleeved and fixedly connected to the outer wall of the outer end of the rotating rod 7 located outside the liquid inlet pipe 4. The inner part of the driven sprocket 26 is connected to one end of the moving assembly located outside the liquid inlet pipe 4. The chain 19 is sleeved outside the driving sprocket 25 and the driven sprocket 26, and the chain 19 meshes with both the driving sprocket 25 and the driven sprocket 26. The side wall of the protective cover 10 is fixedly connected to the outer walls of the liquid inlet pipe 4 and the collection box 9. The chain 19, the driving sprocket 25 and the driven sprocket 26 are all located inside the protective cover 10.

[0057] More specifically, when the rotating rod 7 rotates, the driving sprocket 25 connected thereto will rotate together. Subsequently, the driving sprocket 25 drives the driven sprocket 26 to rotate together inside the protective cover 10 through the chain 19. When the driven sprocket 26 rotates, it will also drive the connected moving assembly to rotate.

[0058] As a preferred embodiment of the present invention, the moving assembly includes a transmission rod 27, a gear 29 and a rack plate 30. One end of the transmission rod 27 is fixedly connected to the inner wall of the driven sprocket 26. The other end of the transmission rod 27 penetrates through the outer wall of the collection box 9 to the inside of the collection box 9 and is fixedly connected to the inner wall of the gear 29. The outer wall of the transmission rod 27 is rotatably connected to the inner wall of the penetration part of the collection box 9. One end of the rack plate 30 is connected to the shielding assembly, and the rack plate 30 meshes with the gear 29.

[0059] More specifically, when the driven sprocket 26 rotates, the transmission rod 27 connected thereto will rotate together. Then the transmission rod 27 drives the gear 29 located inside the collection box 9 to rotate. After the gear 29 rotates, it can drive the rack plate 30 to move horizontally through meshing, thereby pulling the shielding assembly to one side, and thus realizing the opening and closing of the outer slag outlet 21 and the inner slag outlet 24.

[0060] As a preferred embodiment of the present invention, the shielding assembly includes an outer baffle 20, a partition mesh plate 28 and an inner baffle 31. One side of the partition mesh plate 28 is fixedly connected to one end of the rack plate 30, and the other side of the partition mesh plate 28 is fixedly connected to one end of the inner baffle 31. An alignment opening 32 is formed through the upper surface of the inner baffle 31 near one end of the partition mesh plate 28. The upper surface of the inner baffle 31 is aligned with the inner slag discharge opening 24, and the width of the remaining part of the inner baffle 31 without the alignment opening 32 is not less than the width of the inner slag discharge opening 24. The side wall at the lower end of the partition mesh plate 28 is slidably connected to the inner wall of the collection box 9, and the side wall at the upper end of the partition mesh plate 28 is slidably connected to the inner wall of the outer slag discharge opening 21. The upper surface of the partition mesh plate 28 is fixedly connected to the bottom surface of one end of the outer baffle 20. The side of the outer baffle 20 close to the partition mesh plate 28 abuts against the side of the outer scraping strip 22 away from the drum filter screen 16. The movable distance of the outer baffle 20 is not less than the width of the outer slag discharge opening 21, and the width of the alignment opening 32 is not less than the width between the inner slag discharge opening 24 and the outer slag discharge opening 21.

[0061] More specifically, when the rack plate 30 moves horizontally under the action of the gear 29, the rack plate 30 will pull the partition mesh plate 28 to move together. After that, the partition mesh plate 28 can drive the outer baffle 20 and the inner baffle 31 to move together, and expose the originally blocked outer slag discharge opening 21 and inner slag discharge opening 24 during the movement, so as to facilitate the outer scraping strip 22 and the inner cleaning assembly to collect the impurities cleaned from the outside and inside of the drum filter screen 16.

[0062] After the cleaning and collection are completed, the rack plate 30 pushes the partition mesh plate 28 to return. During the return movement of the partition mesh plate 28, the impurities falling directly below the outer slag discharge opening 21 and the inner slag discharge opening 24 will be squeezed towards the end of the collection box 9 away from the rack plate 30. The liquid substances during the squeezing process will pass through the partition mesh plate 28 and remain in this part of the rack plate 30 and the gear 29. Due to the squeezing of the impurities by the partition mesh plate 28, these impurities will not cause obstacles during the next impurity collection.

[0063] As a preferred embodiment of the present invention, the inner cleaning assembly includes a fixing plate 34, a support rod 35 and two scraping assemblies. One side of the fixing plate 34 is fixedly connected to the inner wall of the rotating cavity 23 away from one end of the support plate 17, and the other side of the fixing plate 34 is fixedly connected to one end of the support rod 35. The side wall of the support rod 35 is connected to the two scraping assemblies. The support rod 35 and the two scraping assemblies are both located inside the drum filter screen 16. The outer wall of the fixing plate 34 is rotatably connected to the inner wall of the support ring 18. The two scraping assemblies are symmetrically arranged with the support rod 35 as the axis.

[0064] More specifically, under normal circumstances, the support rod 35 and the two scraping assemblies remain stationary under the action of the fixing plate 34 and will not affect the normal filtration of the drum filter screen 16.

[0065] When the drum filter screen 16 rotates, at this time, the inner side wall of the drum filter screen 16 rotates relative to the two scraping components. Then, the impurities adhering to the inner side wall of the drum filter screen 16 will be scraped off under the action of the scraping components. When the opening 33 of the drum filter screen 16 rotates to align with the inner slag dropping port 24, this part of the impurities will just fall from the opening 33 and the inner slag dropping port 24 into the collection box 9.

[0066] As a preferred solution of the present invention, both of the two scraping components include an inner scraping strip 37 and two extension rods 36. One end of each of the two extension rods 36 is fixedly connected to the side wall of the support rod 35, and the other end of each of the two extension rods 36 is fixedly connected to one side of the inner scraping strip 37. The other side of the inner scraping strip 37 is slidably connected to the inner wall of the drum filter screen 16, and one of the inner scraping strips 37 is located on one side above the inner slag dropping port 24.

[0067] More specifically, when the drum filter screen 16 rotates, a relative displacement rotation occurs between the inner side wall of the drum filter screen 16 and the inner scraping strip 37. At this time, the impurities adhering to the inner side wall of the drum filter screen 16 will be scraped off under the action of the inner scraping strip 37 until they fall into the collection box 9 subsequently.

[0068] As a preferred solution of the present invention, a pull rod 11 is fixedly connected to the side of the hand wheel 8 away from the rotating rod 7. Support blocks 5 are fixedly connected to the upper surface and the bottom surface of the outer wall of the liquid inlet pipe 4. Limit L-shaped rods 6 are fixedly connected to the inner walls of the two support blocks 5. The two limit L-shaped rods 6 are respectively located on the upper and lower sides of the hand wheel 8, and the other ends of the two limit L-shaped rods 6 are matched with the side wall of the pull rod 11.

[0069] More specifically, by providing the support blocks 5, the pull rod 11 and the limit L-shaped rods 6, the number of rotation turns of the hand wheel 8 can be limited when the hand wheel 8 is rotated, so that the hand wheel 8 can only rotate back and forth by 180°. Furthermore, during the rotation process, the opening 33 of the drum filter screen 16 can be exactly aligned with the inner slag dropping port 24.

[0070] As a preferred solution of the present invention, a drain pipe and a slag discharge pipe are fixedly connected and communicated with the bottom surface of the collection box 9. A drain pipe flange 12 is tightly and hermetically connected to the end of the drain pipe away from the collection box 9, and a slag discharge pipe flange 13 is tightly and hermetically connected to the end of the slag discharge pipe away from the collection box 9.

[0071] More specifically, by providing the drain pipe and the slag discharge pipe, during major overhauls in the later stage, the liquid medium and solid debris inside the collection box 9 can be discharged and collected for treatment first, reducing the harm to maintenance personnel and the environment, and at the same time increasing the safety during maintenance.

[0072] As a preferred embodiment of the present invention, a pressure sensor 14 is fixedly connected to the inner wall of the collection box 9 near one end of the inner slag discharge port 24, and a flow rate sensor 15 is fixedly connected to the inner wall of the liquid inlet pipe 4. The flow rate sensor 15 is located between the drum filter screen 16 and the valve body 1.

[0073] More specifically, by setting the pressure sensor 14, when the partition screen plate 28 pushes the impurities to the end of the collection box 9 and squeezes them tightly, when there is too much impurity inside the collection box 9, at this time, the pressure sensor 14 monitors that the pressure is too high and transmits the signal to an external processor, and then prompts the maintenance personnel to carry out maintenance and discharge in advance.

[0074] By setting the flow rate sensor 15, when it is monitored that the flow rate is lower than the set range (which means that the pore diameter is blocked), at this time, an electrical signal is transmitted to an external processor to remind the maintenance personnel to clean the outside and inside of the drum filter screen 16 in the above-mentioned manner.

[0075] It should be particularly noted here that:

[0076] 1. After cleaning the inside of the drum filter screen 16 in the above-mentioned manner, if the flow rate sensor 15 monitors that the flow rate is still lower than the set range, at this time, the maintenance personnel need to overhaul the entire floating ball valve in advance for more specific cleaning.

[0077] 2. The pressure sensor 14, the flow rate sensor 15 and the external processor are all existing mature technologies, so the principle thereof will not be described in detail here.

[0078] Finally, it should be particularly emphasized that: for the components such as the rotating rod 7, the transmission rod 27, the pressure sensor 14 and the flow rate sensor 15 whose two ends are respectively located inside and outside the liquid inlet pipe 4 and the collection box 9, seals are provided at their connections with the liquid inlet pipe 4 and the collection box 9, and when necessary, isolation is also carried out through packing and the like. The technologies such as seals and packing are mature technologies inside the existing floating ball valve, so they will not be described in detail here.

[0079] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The flip - type floating ball valve, comprising a valve body (1), a valve cover (2) installed at the upper end of the valve body (1), and a liquid outlet pipe (3) installed on one side of the valve body (1), is characterized in that: One end of the valve body (1) far from the liquid outlet pipe (3) is fixedly connected with a liquid inlet pipe (4). A collection box (9) is fixedly connected to the bottom surface of the outer wall of the liquid inlet pipe (4). An outer slag discharge port (21) and an inner slag discharge port (24) are penetratingly opened on one side of the liquid inlet pipe (4) close to the collection box (9). Both the outer slag discharge port (21) and the inner slag discharge port (24) are communicated with the inside of the collection box (9). A rotating cavity (23) is formed in the inner wall of the liquid inlet pipe (4). The inner wall of the rotating cavity (23) is connected with an inner cleaning component and a filtering component. One end of the inner cleaning component adjacent to the filtering component is connected. One end of the filtering component far from the inner cleaning component penetrates through the inner wall of the liquid inlet pipe (4) to the outside of the liquid inlet pipe (4) and is connected with a transmission component. The other end of the transmission component is connected with a moving component. The other end of the moving component penetrates through the outer wall of the collection box (9) to the inside of the collection box (9) and is connected with a shielding component. Both ends of the shielding component are respectively aligned with and matched with the outer slag discharge port (21) and the inner slag discharge port (24). The inside of the filtering component is matched with the inner slag discharge port (24). An outer scraping strip (22) is fixedly connected to the inner wall of the liquid inlet pipe (4). The outer scraping strip (22) is matched with the outside of the filtering component.

2. The swing-type floating ball valve according to claim 1, wherein: The filtering component includes a rotating rod (7), a handwheel (8), a drum filter screen (16), a support plate (17) and a support ring (18). One end of the drum filter screen (16) is fixedly connected to the side wall of the support plate (17). The other side of the support plate (17) is fixedly connected to one end of the rotating rod (7). The other end of the rotating rod (7) penetrates through the inner wall of the liquid inlet pipe (4) to the outside of the liquid inlet pipe (4) and is fixedly connected to the middle of the handwheel (8). And one end of the rotating rod (7) located outside the liquid inlet pipe (4) is connected with the transmission component. One end of the drum filter screen (16) far from the support plate (17) is fixedly connected to one side of the support ring (18). The inner wall of the support ring (18) is connected with the inner cleaning component. The outer walls of the drum filter screen (16), the support plate (17) and the support ring (18) are all rotatably connected to the inner wall of the rotating cavity (23). The inner cleaning component is located inside the drum filter screen (16). An opening (33) is penetratingly opened on the surface of the drum filter screen (16). The opening (33) is matched with the inner slag discharge port (24) in size. One side of the outer scraping strip (22) abuts against the outer side wall of the drum filter screen (16).

3. The swing-type floating ball valve according to claim 2, wherein: The transmission component includes a protective cover (10), a chain (19), a driving sprocket (25) and a driven sprocket (26). The driving sprocket (25) is sleeved and fixedly connected to the outer wall of one end of the rotating rod (7) located outside the liquid inlet pipe (4). The inside of the driven sprocket (26) is connected with one end of the moving component located outside the liquid inlet pipe (4). The chain (19) is sleeved outside the driving sprocket (25) and the driven sprocket (26). And the chain (19) is meshed with both the driving sprocket (25) and the driven sprocket (26). The side wall of the protective cover (10) is fixedly connected to the outer walls of the liquid inlet pipe (4) and the collection box (9). The chain (19), the driving sprocket (25) and the driven sprocket (26) are all located inside the protective cover (10).

4. The swing-type floating ball valve according to claim 3, wherein: The moving component includes a transmission rod (27), a gear (29) and a rack plate (30). One end of the transmission rod (27) is fixedly connected to the inner wall of the driven sprocket (26). The other end of the transmission rod (27) penetrates through the outer wall of the collection box (9) to the inside of the collection box (9) and is fixedly connected to the inner wall of the gear (29). The outer wall of the transmission rod (27) is rotatably connected to the inner wall of the penetration part of the collection box (9). One end of the rack plate (30) is connected to the shielding component, and the rack plate (30) meshes with the gear (29).

5. The swing-type floating ball valve according to claim 4, characterized in that: The shielding component includes an outer baffle (20), a partition mesh plate (28) and an inner baffle (31). One side of the partition mesh plate (28) is fixedly connected to one end of the rack plate (30). The other side of the partition mesh plate (28) is fixedly connected to one end of the inner baffle (31). An alignment opening (32) is formed through the upper surface of the inner baffle (31) near one end of the partition mesh plate (28). The upper surface of the inner baffle (31) is aligned with the inner slag discharge opening (24). The width of the remaining part of the inner baffle (31) where the alignment opening (32) is not formed is not less than the width of the inner slag discharge opening (24). The side wall at the lower end of the partition mesh plate (28) is slidably connected to the inner wall of the collection box (9). The side wall at the upper end of the partition mesh plate (28) is slidably connected to the inner wall of the outer slag discharge opening (21). The upper surface of the partition mesh plate (28) is fixedly connected to the bottom surface of one end of the outer baffle (20). The side of the outer baffle (20) close to the partition mesh plate (28) abuts against the side of the outer scraping strip (22) away from the drum filter screen (16). The movable distance of the outer baffle (20) is not less than the width of the outer slag discharge opening (21). The width of the alignment opening (32) is not less than the width between the inner slag discharge opening (24) and the outer slag discharge opening (21).

6. The swing-type floating ball valve according to claim 2, wherein: The inner cleaning component includes a fixing plate (34), a support rod (35) and two scraping components. One side of the fixing plate (34) is fixedly connected to the inner wall of the rotation cavity (23) away from one end of the support plate (17). The other side of the fixing plate (34) is fixedly connected to one end of the support rod (35). The side wall of the support rod (35) is connected to the two scraping components. The support rod (35) and the two scraping components are both located inside the drum filter screen (16). The outer wall of the fixing plate (34) is rotatably connected to the inner wall of the support ring (18). The two scraping components are symmetrically arranged with the support rod (35) as the axis.

7. The swing floating ball valve according to claim 6, wherein: Both of the two scraping components include an inner scraping strip (37) and two extension rods (36). One end of each of the two extension rods (36) is fixedly connected to the side wall of the support rod (35). The other end of each of the two extension rods (36) is fixedly connected to one side of the inner scraping strip (37). The other side of the inner scraping strip (37) is slidably connected to the inner wall of the drum filter screen (16). And one of the inner scraping strips (37) is located on one side above the inner slag discharge opening (24).

8. The tilting floating ball valve according to claim 2, wherein: One side of the handwheel (8) away from the rotating rod (7) is fixedly connected with a pull rod (11). On the upper surface and the bottom surface of the outer wall of the liquid inlet pipe (4), support blocks (5) are fixedly connected. The inner walls of the two support blocks (5) are fixedly connected with limiting L-shaped rods (6). The two limiting L-shaped rods (6) are respectively located on the upper and lower sides of the handwheel (8), and the other ends of the two limiting L-shaped rods (6) are matched with the side wall of the pull rod (11).

9. The swing-type floating ball valve according to claim 1, characterized in that: The bottom surface of the collection box (9) is fixedly connected and communicated with a liquid discharge pipe and a slag discharge pipe. One end of the liquid discharge pipe away from the collection box (9) is tightly and sealingly connected with a liquid discharge pipe flange (12), and one end of the slag discharge pipe away from the collection box (9) is tightly and sealingly connected with a slag discharge pipe flange (13).

10. The swing - type floating ball valve according to claim 2, wherein: A pressure sensor (14) is fixedly connected to the inner wall of the collection box (9) near one end of the inner slag falling port (24). A flow rate sensor (15) is fixedly connected to the inner wall of the liquid inlet pipe (4). The flow rate sensor (15) is located between the drum filter screen (16) and the valve body (1).

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