High-pressure large-flow valve lined with anticorrosive coating

Abstract

The invention relates to the technical field of valves, in particular to a high-pressure large-flow valve lined with an anticorrosive coating, which comprises a valve body, a water inlet and a water outlet are arranged on the valve body, a valve cavity is arranged between the water inlet and the water outlet, a valve rod is arranged on the valve body, one end of the valve rod extends into the valve cavity, and a valve clack is rotatably arranged at the tail end of the valve rod. The periphery of the valve rod is sleeved with a corrugated pipe, the periphery of the corrugated pipe is coaxially provided with a rotating cylinder, the rotating cylinder is provided with a plurality of cleaning rods which elastically stretch out and draw back in the radial direction, one end of each cleaning rod is matched with an arc-shaped scraping plate and can penetrate into the wave trough part of the periphery of the corrugated pipe, and the problem that a traditional cleaning brush cannot touch wave troughs is solved. The arc-shaped scraping plate is always attached to the upper side and the lower side of the trough, the cleaning rod slides elastically in the radial direction to ensure that the scraping plate makes close contact with the trough, deposited water scale and impurities are effectively removed, and the corrosion risk is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a high-pressure and large-flow valve with a corrosion-resistant lining. BACKGROUND

[0002] The stop valve belongs to a forced sealing type valve, and pressure needs to be applied to the valve disc when it is closed, so that the sealing surface of the valve disc and the sealing surface of the valve seat are tightly attached, thereby preventing the medium from flowing through.

[0003] The valve with a corrosion-resistant lining is derived from various practical needs and technological promotion. With the increasing demand for control of corrosive media in the industry, especially in the petrochemical field, traditional metal materials are difficult to meet the requirements due to high cost or insufficient corrosion resistance, while the excellent corrosion resistance of fluoroplastic and other materials provides new possibilities. At the same time, the progress of new coating technology solves the limitations of traditional corrosion protection methods and lays the foundation for stable application of the coating. In addition, the harsh requirements for high-pressure and large-flow valves in scenarios such as deep-sea oil and gas development, as well as the urgent need for domestic control of core technologies, and the promotion of industrial automation and environmental protection standards, together promote the technological research and development of such valves.

[0004] For example, Chinese patent CN222255089U discloses a stop valve. The scheme is that a rotating frame is arranged on the outer periphery of the bellows and is limited in axial movement along the valve rod by a limiting structure. A cleaning brush is arranged on the rotating frame along the axis of the bellows and abuts against the outer peripheral wall of the bellows. The cleaning brush is arranged in multiple around the outer periphery of the bellows. The maximum stroke of the bellows stretching is less than the length of the cleaning brush, and the rotating frame drives the cleaning brush to rotate around the outer periphery of the bellows to clean the outer periphery of the bellows.

[0005] However, in the above-mentioned scheme, when the cleaning brush is used to clean the outer periphery of the bellows, the valleys of the outer periphery of the bellows have a certain depth, and the brush cannot penetrate into the valley part, resulting in poor cleaning effect of the valley part of the outer periphery of the bellows, and thus affecting the service life of the bellows. SUMMARY

[0006] Therefore, it is necessary to provide a high-pressure and large-flow valve with a corrosion-resistant lining to solve the problem of reduced service life caused by poor cleaning effect of the outer periphery of the bellows.

[0007] The above-mentioned purpose is achieved by the following technical scheme: A high-pressure and large-flow valve with a corrosion-resistant lining, comprising: A valve body, a water outlet and a water inlet are arranged on the valve body, a valve cavity is arranged between the water outlet and the water inlet, a valve cover is connected to the upper end of the valve body, a valve rod is screw-connected in the valve cover, one end of the valve rod extends into the valve cavity, and a valve disc is rotatably arranged on the end of the valve rod, and the valve disc can open or block the water outlet. a bellows, the bellows is sleeved on the valve rod, one end of the bellows is fixedly connected with the valve cover, the other end of the bellows is fixedly connected with the valve disc; a rotating cylinder, the rotating cylinder is rotatably arranged in the valve cavity, the axis of the rotating cylinder coincides with the axis of the bellows, a plurality of cleaning rods are radially and elastically arranged on the inner periphery of the rotating cylinder, each cleaning rod is provided with an arc-shaped scraper near one end of the bellows, and the arc-shaped scraper is in sliding fit with the trough part of the outer periphery of the bellows.

[0008] Further, the arc-shaped scraper comprises a first scraper and a second scraper, the first scraper and the second scraper are hingedly arranged at one end of the cleaning rod, a first elastic member is arranged between the first scraper and the second scraper, and the first elastic member pushes the first scraper and the second scraper to fit on the upper and lower sides of the trough of the outer periphery of the bellows.

[0009] Further, the cleaning rod comprises a fixed end and an elastic end, a second elastic member is arranged between the elastic end and the fixed end, and the second elastic member can push the elastic end to extend out of the fixed end.

[0010] Further, a plurality of sliding grooves extending along the axial direction are uniformly distributed on the inner periphery of the rotating cylinder, and the fixed end of the cleaning rod is slidingly arranged in the sliding groove.

[0011] Further, a driving assembly is arranged on the outer periphery of the valve disc, and the driving assembly is configured to drive the rotating cylinder to rotate around the axis of the rotating cylinder by a preset angle when the valve disc opens the water outlet.

[0012] Further, the driving assembly comprises a driving sleeve and a matching rod, the driving sleeve is coaxially and fixedly arranged on the valve disc, a plurality of spiral grooves and straight grooves are arranged on the outer periphery of the driving sleeve, the straight grooves extend along the axial direction of the driving sleeve, the spiral grooves are connected with adjacent straight grooves at both ends, a smooth inclined surface is arranged between one end of the spiral groove and the straight groove, and the matching rod can slide in the spiral groove and the straight groove.

[0013] Further, a plurality of supporting rods moving along the axial direction of the rotating cylinder are arranged on the inner periphery of the rotating cylinder, a supporting claw is rotatably arranged on one end of the supporting rod, three rotating rollers are rotatably arranged on the supporting claw, a supporting ring is arranged around the outer periphery of the three rotating rollers, and the outer periphery of the supporting ring abuts against the peak part of the outer periphery of the bellows.

[0014] Further, the supporting ring is a belt.

[0015] Further, a damping assembly is arranged between the rotating cylinder and the supporting rod.

[0016] Further, the damping assembly comprises a damping cylinder and a damping plate, the damping plate is slidingly sealed in the damping cylinder, a damping hole is formed in the damping plate, the damping hole allows damping liquid to pass through, and the support rod is in abutment with the damping plate at one end away from the support claw.

[0017] The present application has the following advantages: The cleaning rod elastically slides along the radial direction of the rotating cylinder, and cooperates with the arc-shaped scraper, so that the cleaning rod can reach the trough part of the outer periphery of the corrugated pipe, the problem that the traditional cleaning brush cannot reach the trough is solved, the arc-shaped scraper is always attached to the upper and lower sides of the trough, the radial elastic expansion of the cleaning rod ensures that the scraper is in close contact with the trough, and the deposited water scale and impurities are effectively removed, and the corrosion risk is reduced.

[0018] The sliding groove is arranged on the inner periphery of the rotating cylinder, so that the cleaning rod can slide along the axial direction of the rotating cylinder, so that the cleaning rod can adapt to the expansion and contraction movement of the corrugated pipe, and the cleaning effect is continuously maintained during the opening and closing of the valve body.

[0019] The rotating roller and the support ring of the support claw on the support rod are in abutment with the peak part of the corrugated pipe, the radial load is dispersed, stress concentration caused by water flow impact is avoided, the damping assembly is arranged between the support rod and the rotating cylinder, the damping assembly absorbs the radial impact force of the corrugated pipe through the buffering effect, the hard extrusion of the support ring on the corrugated pipe is reduced, and the abrasion and fracture risk is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structural schematic view of the high-pressure large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application; Figure 2 A front view of the high-pressure large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application; Figure 1 A front view of the high-pressure large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application; Figure 3 Figure 2 A sectional view of the high-pressure large-flow valve with the anticorrosive coating lining along A-A is provided for an embodiment of the present application; Figure 4 A sectional view of the high-pressure large-flow valve with the anticorrosive coating lining along A-A is provided for an embodiment of the present application; Figure 3 A sectional view of the high-pressure large-flow valve with the anticorrosive coating lining along A-A is provided for an embodiment of the present application; Figure 5 Figure 3 A sectional view of the high-pressure large-flow valve with the anticorrosive coating lining along A-A is provided for an embodiment of the present application; Figure 6 A sectional view of the high-pressure large-flow valve with the anticorrosive coating lining along A-A is provided for an embodiment of the present application; Figure 3 A sectional view of the high-pressure large-flow valve with the anticorrosive coating lining along A-A is provided for an embodiment of the present application; Figure 7 ​​The structure schematic view of the valve disc, the driving sleeve, the cleaning rod and the set of support components of the high-pressure and large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application. Figure 8 The structure schematic view of the valve disc, the driving sleeve, the cleaning rod and the set of support components of the high-pressure and large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application. Figure 7 The structure schematic view of the valve disc, the driving sleeve, the cleaning rod and the set of support components of the high-pressure and large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application. Figure 9 The structure schematic view of the valve disc, the driving sleeve, the cleaning rod and the set of support components of the high-pressure and large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application. Figure 7 The structure schematic view of the valve disc, the driving sleeve, the cleaning rod and the set of support components of the high-pressure and large-flow valve with the anticorrosive coating lining is provided for an embodiment of the present application.

[0021] Wherein: 100, valve body; 110, water inlet; 120, water outlet; 130, flange; 140, valve cover; 150, valve rod; 160, hand wheel; 170, valve disc; 200, rotating cylinder; 210, sliding groove; 220, arc-shaped scraper; 221, first scraping piece; 222, second scraping piece; 223, first elastic member; 230, cleaning rod; 231, telescopic end; 232, fixed end; 233, second elastic member; 240, support rod; 250, support claw; 251, rotating roller; 260, support ring; 300, driving sleeve; 310, straight groove; 320, spiral groove; 330, smooth inclined surface; 340, matching rod; 400, damping cylinder; 410, damping plate; 420, damping hole; 430, connecting rod; 440, support plate; 500, bellows; 510, wave trough part; 520, wave crest part. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0023] The numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. Unless otherwise specified, the "connection" and "coupling" of the present application include direct and indirect connections (couplings). In the description of the present application, 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 application and simplifying the description, and therefore cannot be understood as limiting the device or element to a particular orientation, configuration and operation. Therefore, it cannot be understood as a limitation on the present application.

[0024] In the present invention, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0025] The present invention provides a high-pressure large-flow valve lined with a corrosion-resistant coating. Figures 1-9 The present invention provides a high-pressure large-flow valve lined with a corrosion-resistant coating.

[0026] A high-pressure large-flow valve lined with a corrosion-resistant coating, comprising a valve body 100 made of high-strength alloy material, the inner wall of which is uniformly coated with a corrosion-resistant coating, which can effectively resist the erosion of complex media such as acid and alkali, high temperature, etc. The valve body 100 is provided with a water outlet 120 and a water inlet 110, and a valve cavity is arranged between the water outlet 120 and the water inlet 110. The upper end of the valve body 100 is provided with a valve cover 140, which is fixedly connected with the valve body 100 through a flange 130. The joint surface of the valve cover 140 and the valve body 100 is provided with a sealing gasket (not shown in the figure), which ensures the overall sealing performance under high pressure working conditions. A valve stem 150 is helically arranged at the center position of the valve cover 140, and the valve stem 150 is helically arranged in the valve cover 140 through a threaded pair, and the axis of the valve stem 150 and the axis of the valve cover 140 strictly coincide, which ensures the coaxiality of the transmission process. The valve stem 150 is coaxially and fixedly provided with a hand wheel 160 at the other end thereof. The operator turns the hand wheel 160, which drives the valve stem 150 to rotate around its own axis. Since the valve stem 150 is helically connected with the valve cover 140, the screwing movement of the threaded pair will be converted into the axial displacement of the valve stem 150, so that the valve stem 150 moves up and down in the valve cavity. When the valve disc 170 descends, it tightly fits the sealing surface of the water outlet 120 to achieve plugging, and when it rises, it separates from the sealing surface to form a flow passage, thereby realizing precise control of fluid delivery.

[0027] To solve the dynamic sealing problem between the valve stem 150 and the valve cover 140 under high pressure working conditions, the existing technology generally uses a corrugated pipe 500 sealing structure. The corrugated pipe 500 is sleeved on the outer periphery of the valve stem 150. The upper end of the corrugated pipe 500 is fixedly connected with the bottom of the valve cover 140 by welding, and the lower end is sealingly welded with the top of the valve disc 170, forming a completely closed isolation space. This structure compensates for the axial displacement of the valve stem 150 through the flexibility of the corrugated pipe 500, replacing the traditional packing seal or mechanical seal, and can completely block the leakage path of the fluid medium along the gap between the valve stem 150 and the valve cover 140, significantly improving the sealing reliability between the valve stem 150 and the valve cover 140, and is especially suitable for high-risk medium conveying scenes such as toxic, harmful, flammable and explosive.

[0028] However, during long-term operation, the corrugated pipe 500 has a significant cleaning and maintenance problem. Since the corrugated pipe 500 has a periodic corrugated structure, the flow channel shape limits the flow scouring force on the valley part 510 of the outer periphery, which is significantly less than that on the peak part 520. As a result, calcium and magnesium ions, suspended particles and chemical impurities in the medium are easily deposited and condensed in the valley part 510 to form scale or dirt. These deposits are difficult to remove by fluid self-scouring after adhering to the valley surface, and long-term accumulation can gradually fill the valley space, causing the following problems: On the one hand, it increases the friction resistance when the corrugated pipe 500 stretches and contracts, resulting in an increase in the operating torque of the valve stem 150, and in severe cases, even a jam phenomenon occurs. On the other hand, it will damage the elastic deformation characteristics of the corrugated pipe 500, making it unable to achieve complete stretch compensation, thereby affecting the sealing performance. More seriously, the corrosive components in the deposits can accelerate the local corrosion of the metal wall of the corrugated pipe 500, significantly shortening its service life, and ultimately affecting the overall operation safety of the valve body 100.

[0029] Although the existing technology uses a cleaning brush to regularly clean the outer periphery of the corrugated pipe 500, the bristle length and hardness of the traditional cleaning brush are fixed and cannot adapt to the changes in the curved surface of the peaks and valleys of the corrugated pipe 500. It can only simply clean the surface of the peaks and cannot reach the deposits at the bottom of the valleys, resulting in unsatisfactory cleaning effect and being unable to fundamentally solve the fouling problem of the corrugated pipe 500.

[0030] Based on this, the valve cavity is provided with a rotating cylinder 200, the rotating cylinder 200 coincides with the axis of the bellows 500, a plurality of cleaning rods 230 are arranged on the inner wall of the rotating cylinder 200 and elastically stretch along the radial direction of the rotating cylinder 200, the cleaning rods 230 are uniformly distributed along the circumferential direction and the axial direction of the rotating cylinder 200, so that each layer of the valley part 510 of the outer periphery of the bellows 500 can have a plurality of cleaning rods 230, one end of each cleaning rod 230 is provided with an arc-shaped scraper 220, the arc-shaped scraper 220 can be matched with the valley part 510 of the outer periphery of the bellows 500, the cleaning rod 230 elastically stretches in the radial direction, the cleaning rod 230 can push the arc-shaped scraper 220 to be attached to the valley part 510 of the outer periphery of the bellows 500, and when the rotating cylinder 200 rotates around its own axis, the arc-shaped scraper 220 can be driven by the cleaning rod 230 to scrape the impurities of the valley part 510 of the bellows 500, so that the cleaning effect of the valley part 510 of the outer periphery of the bellows 500 is improved, and the accumulation of impurities in the valley part 510 of the outer periphery of the bellows 500 is avoided.

[0031] It can be understood that, by arranging the cleaning rod 230 which can elastically stretch in the radial direction of the rotating cylinder 200, the arc-shaped scraper 220 on the cleaning rod 230 can be deeply arranged in the valley part 510 of the outer periphery of the bellows 500, and the arc-shaped scraper 220 is always in contact with the valley part 510 of the outer periphery of the bellows 500, compared with the traditional brush cleaning, the arc-shaped scraper 220 of the present application can be deeply arranged in the valley part 510 of the outer periphery of the bellows 500, thereby reducing the accumulation of water scale or other chemical impurities on the outer periphery of the bellows 500, and improving the service life of the bellows 500 as a whole.

[0032] Specifically, the arc-shaped scraper 220 in the embodiment of the present application includes a first scraper 221 and a second scraper 222, as shown in Figure 5 and Figure 8 The first scraper 221 and the second scraper 222 both have two sections, which are a scraping section and a connecting section, the scraping section is a straight section, the scraping section near one end of the valley part 510 of the bellows 500 has a triangular-shaped tip, the tip can abut the outer periphery of the valley part 510 of the bellows 500, the connecting section is an arc-shaped section, the connecting section is matched with the shape of the corrugated part of the bellows 500, and the connecting sections of the first scraper 221 and the second scraper 222 are hinged together, a first elastic member 223 is arranged at the hinged position of the first scraper 221 and the second scraper 222, the first elastic member 223 is a torsion spring, the first elastic member 223 makes the scraping sections of the first scraper 221 and the second scraper 222 always abut the outer periphery of the valley part 510 of the bellows 500, so as to ensure the cleaning effect.

[0033] More specifically, the cleaning rod 230 in the embodiment comprises a fixed end 232 and a telescopic end 231, a second elastic member 233 is arranged between the fixed end 232 and the telescopic end 231, the second elastic member 233 is a compression spring, the second elastic member 233 makes the telescopic end 231 have a tendency to extend out of the fixed end 232, so that the telescopic end 231 of the cleaning rod 230 can extend out of the fixed end 232, and the first scraper 221 and the second scraper 222 are both hinged on the telescopic end 231 of the cleaning rod 230, so that the telescopic end 231 extends out of the fixed end 232 to ensure that the first scraper 221 and the second scraper 222 are always in contact with the trough part 510 of the outer periphery of the bellows 500.

[0034] In a further embodiment, in order to further improve the cleaning effect of the first scraper 221 and the second scraper 222, and make the first scraper 221 and the second scraper 222 also play a cleaning role when the bellows 500 is extended and retracted, a plurality of sliding grooves 210 extending along the axial direction are uniformly distributed on the inner periphery of the rotating cylinder 200, and the fixed end 232 of the cleaning rod 230 is slidingly arranged in the sliding groove 210, so that the cleaning rod 230 can slide along the axial direction of the rotating cylinder 200. Since the rotating cylinder 200 is coaxially arranged with the bellows 500, the cleaning rod 230 can move along the axial direction of the bellows 500, and when the bellows 500 is extended and retracted, the plurality of cleaning rods 230 can be synchronously driven to move along the axial direction, thereby being adapted to the extension and retraction of the bellows 500. When the bellows 500 is extended and retracted, the first scraper 221 and the second scraper 222 on the cleaning rod 230 can still abut in the trough part 510 of the outer periphery of the bellows 500.

[0035] In a further embodiment, in order to make the rotating cylinder 200 be able to rotate around its own axis, a driving assembly is arranged on the outer periphery of the valve disc 170 in the embodiment, the driving assembly is used to drive the rotating cylinder 200 to rotate around its own axis, and the driving assembly is configured to drive the rotating cylinder 200 to rotate around its own axis by a preset angle when the valve disc 170 opens the water outlet 120.

[0036] Specifically, the driving assembly in the embodiment comprises a driving sleeve 300 and a matching rod 340, as shown in the figure, Figure 6 、 Figure 7 and Figure 9 The driving sleeve 300 is coaxially and fixedly arranged on the outer periphery of the rotating connection part of the valve disc 170 and the valve rod 150, the driving sleeve 300 is connected through the bellows 500 and thus cannot rotate circumferentially, the outer periphery of the driving sleeve 300 is provided with a plurality of straight grooves 310 extending along the axial direction, a spiral groove 320 is arranged between adjacent straight grooves 310, and the two ends of the spiral groove 320 are respectively connected to adjacent straight grooves 310 and connected to the upper half of the straight groove 310, as shown in the figure, Figure 7As shown, the left part of the helical groove 320 is higher than the right part, the left part of the helical groove 320 is connected with the top of the straight groove 310, and a smooth inclined surface 330 is arranged at the connecting position, the matching rod 340 is arranged along the radial direction of the rotating cylinder 200, one end of the matching rod 340 is fixedly connected to the inner circumferential surface of the rotating cylinder 200, and the other end of the matching rod 340 is located in the left part of the helical groove 320 when the valve disc 170 blocks the water outlet 120; as the valve disc 170 moves upward along the axial direction to gradually open the water outlet 120, the matching rod 340 will slide along the helical groove 320 from the left part to the right part, at this time, the matching rod 340 drives the rotating cylinder 200 to rotate around the axis thereof, and the matching rod 340 enters the straight groove 310 from the right part of the helical groove 320; when the valve disc 170 completely opens the water outlet 120, the valve disc 170 moves upward to the limit, and at this time, the matching rod 340 moves to the lower end in the straight groove 310; when the valve disc 170 blocks the water inlet 110, the valve disc 170 moves downward, the matching rod 340 moves upward in the straight groove 310 and enters the left part of the adjacent helical groove 320 through the smooth inclined surface 330, and when the valve disc 170 opens the water outlet 120 again, the rotating cylinder 200 can still rotate around the axis thereof, thereby driving the first scraper 221 and the second scraper 222 on the plurality of cleaning rods 230 to clean the valley part 510 on the outer circumferential surface of the corrugated pipe 500.

[0037] It should be noted that one end of the matching rod 340 extending into the helical groove 320 or the straight groove 310 is provided with an elastic protrusion (not shown in the figure), and the elastic protrusion is arranged to enable the matching rod 340 to pass through the smooth inclined surface 330 at the connecting position of the helical groove 320 and the straight groove 310, thereby avoiding the matching rod 340 from being stuck on the smooth inclined surface 330.

[0038] It can be understood that, as the water flow impacts the valve disc 170 when passing through the corrugated pipe 500, the valve disc 170 and the valve cover 140, and the valve rod 150, and especially when the valve disc 170 is in a half-open state and the flow rate is uneven, the corrugated pipe 500 bears a radial eccentric load, which further causes local stress concentration of the corrugated pipe 500 and loosening or rupture of the welding position of the corrugated pipe 500 and the valve disc 170 and the valve cover 140 with the increase of the use time.

[0039] Based on this, a plurality of support rods 240 moving along the axial direction of the rotating cylinder 200 are arranged on the inner circumferential surface of the rotating cylinder 200, the support rods 240 on the same straight line are a group, a plurality of groups of support rods 240 are uniformly distributed in the circumferential direction of the inner circumferential surface of the rotating cylinder 200, one end of the support rod 240 is slidably connected with the inner circumferential surface of the rotating cylinder 200, and a support claw 250 is arranged on the other end of the support rod 240. Figure 8As shown, the support claw 250 is provided with three rotating rollers 251, which are distributed in an isosceles triangle shape on the support claw 250, and the outer periphery of the three rotating rollers 251 is provided with a support ring 260, and the outer periphery of the support ring 260 can abut against the wave crest part 520 of the outer periphery of the corrugated pipe 500.

[0040] It should be noted that, as Figure 8 As shown, the outer periphery of the rotating roller 251 in the embodiment is in the shape of a sandglass, and the middle diameter is smaller than the diameter of the two ends. The arrangement of the surface of the rotating roller 251 enables the support ring 260 provided around the outer periphery to be in close contact with the wave crest part 520 of the outer periphery of the corrugated pipe 500, and can firmly support the wave crest part 520 of the outer periphery of the corrugated pipe 500. The outer periphery of each layer of the wave crest part 520 of the outer periphery of the corrugated pipe 500 is provided with a plurality of support rods 240, and the plurality of support rods 240 are uniformly distributed along the outer periphery of the wave crest part 520, thereby providing a stable support effect. The arrangement of the three rotating rollers 251 and the support ring 260 enables the support rod 240 to stably support the wave crest part 520 of the outer periphery of the corrugated pipe 500 when the rotating cylinder 200 rotates around its own axis. The support ring 260 can rotate under the action of the rotating roller 251 to change the contact position between the support ring 260 and the wave crest part 520 of the outer periphery of the corrugated pipe 500, and can also reduce the frictional resistance of the support rod 240 to the corrugated pipe 500 (reduce the rotating resistance and reduce the wear of the corrugated pipe 500) Specifically, the support ring 260 in the embodiment is a belt.

[0041] It can be understood that when the corrugated pipe 500 provided with the support rod 240 and the support ring 260 is impacted by water flow, the corrugated pipe 500 will be tightly abutted by the support ring 260. If the support rod 240 cannot move radially along the rotating cylinder 200, the force of the support ring 260 on the corrugated pipe 500 will increase, which will easily cause local stress increase. In order to reduce the stress, the damping assembly is arranged between the support rod 240 and the rotating cylinder 200, which can buffer and absorb part of the force of the corrugated pipe 500 on the support ring 260, so that the stress of the support ring 260 on the corrugated pipe 500 is reduced.

[0042] Specifically, the damping assembly in the embodiment includes a damping cylinder 400 and a damping plate 410. The inside of the side wall of the rotating cylinder 200 is provided with a sealed cavity, which is named the damping cylinder 400. The damping plate 410 is slidingly and sealingly arranged in the damping cylinder 400. The damping plate 410 can move in the radial direction of the rotating cylinder 200. The damping plate 410 is provided with a damping hole 420. When the damping plate 410 moves in the damping cylinder 400, the damping liquid in the damping cylinder 400 passes through the damping hole 420, so that the damping effect of the damping plate 410 can be achieved. The damping plate 410 is provided with a connecting rod 430 at one end close to the support rod 240. The connecting rod 430 slidingly and sealingly penetrates the damping cylinder 400, that is, the connecting rod 430 slidingly and sealingly penetrates the inner side wall of the rotating cylinder 200. The other end of the connecting rod 430 is fixedly connected with a support plate 440, so that the support plate 440 can also move in the radial direction of the rotating cylinder 200. The support plate 440 abuts against the support rod 240. The support rod 240 is also slidingly arranged in the sliding groove 210, so that the support rod 240 can move in the axial direction of the rotating cylinder 200 to adapt to the expansion and contraction of the bellows 500. At the same time, the support rod 240 can move in the radial direction of the rotating cylinder 200 when it is pushed by the bellows 500, so that the support rod 240 pushes the support plate 440, the support plate 440 pushes the damping plate 410, and the damping effect of the damping plate 410 is transmitted to the support rod 240, so that the support rod 240 slowly moves in the radial direction of the rotating cylinder 200, thereby reducing the stress of the support ring 260 on the outer circumferential part of the bellows 500 and avoiding excessive stress on the outer circumferential part of the bellows 500.

[0043] It should be noted that a plurality of return springs are arranged between the damping plate 410 and the damping cylinder 400 in the embodiment. When the damping plate 410 is not pushed by the support rod 240, the return springs drive the damping plate 410 to return, so as to prepare for the next push by the support rod 240. At the same time, the damping assembly in the embodiment has a plurality of damping assemblies, each damping assembly corresponding to a group of support rods 240, so that the outer circumferences of the bellows 500 can be subjected to the damping effect of the damping assembly, thereby reducing the stress of each group of support rods 240 on the outer circumferences of the bellows 500.

[0044] It should also be noted that a spring is arranged between the cleaning rod 230 and the support rod 240 in the embodiment. When the initial valve body 100 is in the closed state, the spring is compressed, and the cleaning rod 230 is in the state of being pushed by the support rod 240. Figure 4 and Figure 5As shown, the valve body 100 inside the valve 170 block outflow 120, the valve stem 150 outer periphery of the bellows 500 in the state of tension, the spring length at this time is the original length, so that each cleaning rod 230 on the first blade 221 and the second blade 222 222 abut the outer periphery of the bellows 500 wave trough part 510, each support rod 240 on the support ring 260 abut the outer periphery of the bellows 500 wave crest part 520, when the valve body 100 needs to be opened, the valve 170 will move up, the bellows 500 at this time gradually shorten, the wave trough part 510 and the wave crest part 520 on the bellows 500 close to each other, the cleaning rod 230 will adapt to the shortening of the bellows 500 and close to each other, thereby compressing the spring, so that the support rod 240 between the upper and lower adjacent cleaning rod 230 is always located in the middle part of the upper and lower adjacent cleaning rod 230, avoiding the support ring 260 on the cleaning rod 230 from the wave crest part 520 of the bellows 500.

[0045] The specific working process of the high-pressure large-flow valve with corrosion-resistant coating provided by the application is described in combination with the above-mentioned embodiments: Cleaning: The valve body 100 is in the closed state at the initial state, at which time the bellows 500 on the outer periphery of the valve stem 150 is in the state of tension, as shown in Figure 5 The wave trough part 510 and the wave crest part 520 on the outer periphery of the bellows 500 are far apart, the spring between the cleaning rod 230 and the support rod 240 in the inner periphery of the rotating cylinder 200 is in the original length state, the first blade 221 and the second blade 222 on the cleaning rod 230 are abutted on the upper and lower sides of the wave trough part 510 under the action of the first elastic member 223, the support ring 260 on the support rod 240 abuts the wave crest part 520, and the support ring 260 supports the wave crest part 520 on the outer periphery of the bellows 500.

[0046] When the outflow 120 needs to be opened, the operator rotates the hand wheel 160, and the hand wheel 160 drives the valve stem 150 to rotate. Since the threaded pair of the valve stem 150 is screw-connected with the valve cover 140, the valve stem 150 drives the valve 170 to move upward and gradually open the outflow 120. The valve 170 moves upward and drives the driving sleeve 300 to move upward synchronously, as shown in Figure 7As shown, since the fitting rod 340 of the rotating cylinder 200 is located at the left part of the helical groove 320 when the initial valve body 100 is in the closed state, when the valve disc 170 moves upward, it will drive the fitting rod 340 to slide in the helical groove 320 from the left part to the right part, and then drive the rotating cylinder 200 to rotate through the fitting rod 340, the first scraper 221 and the second scraper 222 on the inner circumferential cleaning rod 230 of the rotating cylinder 200 rotate around the axis of the bellows 500 by a certain angle to clean the valley part 510 of the outer circumferential of the bellows 500, and the support ring 260 on the support rod 240 will rotate around the three rotating rollers 251 to change the contact position of the support ring 260 with the peak part 520 of the outer circumferential of the bellows 500. When the valve disc 170 continues to move upward, the fitting rod 340 enters the straight groove 310 from the helical groove 320, the rotating cylinder 200 no longer rotates, at the same time, the bellows 500 gradually shortens, the valley part 510 of the bellows 500 drives the cleaning rod 230 to move synchronously along the axial direction of the rotating cylinder 200, the springs between the upper and lower adjacent cleaning rods 230 are compressed, and the spring makes the support rod 240 move along the axial direction of the bellows 500 to adapt to the expansion and contraction of the bellows 500, forming the state diagram as shown. Figure 4

[0047] When the valve body 100 is closed again, the operator reverses the hand wheel 160, the valve rod 150 drives the valve disc 170 to move downward to stretch the bellows 500, the valve disc 170 moves downward at the same time drives the driving sleeve 300 to move downward, the fitting rod 340 in the inner circumferential of the rotating cylinder 200 moves upward from the bottom end of the straight groove 310, then the fitting rod 340 enters the left part of the adjacent right helical groove 320 through the smooth slope 330 connecting the straight groove 310 and the helical groove 320, so that the next time the valve disc 170 moves upward can still drive the rotating cylinder 200 to rotate, and then make the first scraper 221 and the second scraper 222 on the cleaning rod 230 clean the valley part 510 of the outer circumferential of the bellows 500 every time the water outlet 120 is opened.

[0048] Support: ​When the corrugated pipe 500 is subjected to radial eccentric load due to uneven water flow, the support rod 240 plays a supporting role at this time, and the other end of the support rod 240 is in sliding abutment against the support plate 440, the support plate 440 is connected with the damping plate 410 through the connecting rod 430, the support rod 240 transmits the force to the support plate 440, the support plate 440 transmits the force to the damping plate 410 and then pushes the damping plate 410 to move in the direction away from the corrugated pipe 500 in the radial direction, since the damping hole 420 is arranged on the damping plate 410, the speed of the damping plate 410 is slow, so that part of the force can be absorbed to play a buffering role, and the stress of the support ring 260 on the outer circumferential peak part 520 of the corrugated pipe 500 is reduced, when the water flow is stable, the damping plate 410 is reset under the action of the reset spring, so as to prepare for the next damping effect.

[0049] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0050] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A high pressure, high flow valve lined with a corrosion resistant coating, characterized in that, The utility model relates to a valve body, the valve body is provided with water outlet and inlet, be provided with valve cavity between water outlet and inlet, the valve body upper end is connected with valve cover, the valve cover is helical and is connected with valve rod in, valve rod one end extends into valve cavity and rotates and is provided with valve flap on the end, valve flap can open or block water outlet, the utility model relates to a bellows, the bellows is sleeved in valve rod periphery, the bellows one end is fixedly connected with valve cover, the bellows other end is fixedly connected with valve flap, the utility model relates to a rotating cylinder, rotating cylinder rotation is arranged in valve cavity, rotating cylinder axis coincides with bellows axis, rotating cylinder inner periphery radially elastically telescopic is provided with a plurality of cleaning rods, each cleaning rod is provided with arc scraper on the end close to bellows, and arc scraper and the valley portion of bellows periphery slide fit. The arc scraper includes a first scraper and a second scraper, the first scraper and the second scraper are hingedly arranged at one end of the cleaning rod, a first elastic member is arranged between the first scraper and the second scraper, and the first elastic member pushes the first scraper and the second scraper to fit on both sides of the valley of the bellows periphery. The cleaning rod includes a fixed end and a telescopic end, a second elastic member is arranged between the telescopic end and the fixed end, and the second elastic member can push the telescopic end out of the fixed end. The rotating cylinder inner periphery is uniformly distributed with a plurality of sliding grooves extending along the axial direction thereof, and the fixed end of the cleaning rod is slidingly arranged in the sliding groove.

2. The high pressure, high flow, lined, corrosion resistant valve of claim 1, wherein, The valve flap periphery is provided with a driving assembly, and the driving assembly is configured to drive the rotating cylinder to rotate around its axis by a preset angle when the valve flap opens the water outlet.

3. The high pressure, high flow, lined, corrosion resistant valve of claim 1, wherein, The driving assembly includes a driving sleeve and a matching rod, the driving sleeve is coaxially and fixedly arranged on the valve flap, a plurality of spiral grooves and straight grooves are formed in the outer periphery of the driving sleeve, the straight grooves extend along the axial direction of the driving sleeve, the spiral grooves are connected between the adjacent straight grooves, a smooth slope is arranged between one end of the spiral groove and the straight groove, and the matching rod can slide in the spiral groove and the straight groove.

4. The high pressure, high flow, lined, corrosion resistant valve of claim 3, wherein, The rotating cylinder inner periphery is provided with a plurality of support rods moving along the axial direction of the rotating cylinder, a support claw is rotatably arranged at one end of the support rod, three rotating rollers are rotatably arranged on the support claw, a support ring is arranged around the outer periphery of the three rotating rollers, and the outer periphery of the support ring abuts against the peak portion of the bellows periphery.

5. The high pressure, high flow, lined, corrosion resistant valve of claim 1, wherein, The support ring is a belt.

6. The high pressure, high flow, lined, corrosion resistant valve of claim 5, wherein, A damping assembly is arranged between the rotating cylinder and the support rod.

7. The high pressure, high flow, lined, corrosion resistant valve of claim 1, wherein, The damping assembly includes a damping cylinder and a damping plate, the damping plate is slidingly and sealingly arranged in the damping cylinder, a damping hole is formed in the damping plate, the damping hole allows damping liquid to pass through, and the end of the support rod away from the support claw abuts against the damping plate.

8. The high pressure, high flow, lined, corrosion resistant valve of claim 7, wherein, ​ 9. The high pressure, high flow, lined, corrosion resistant valve of claim 8, wherein, ​ 10. The high pressure, high flow, lined, corrosion resistant valve of claim 9, wherein, ​

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