A single-piece high-performance gate valve with a ball head type support seat type guide

Abstract

The application relates to the technical field of gate valves and discloses a single-piece high-performance gate valve with a ball head type support seat type guide, which comprises a valve body, the valve body is provided with a valve cavity with an upper end opening, the valve body is fixedly installed with a valve cover covering the upper end opening of the valve cavity, the two sides of the valve body are respectively provided with a water inlet communication pipe and a water outlet communication pipe which are coaxially arranged and communicated with the valve cavity, the valve cover is slidably provided with a valve rod with a bottom end extending into the valve cavity, the bottom end of the valve rod is provided with a single-piece valve flap, the valve flap is used for controlling the on-off of the water inlet communication pipe and the water outlet communication pipe, the water inlet communication pipe and the water outlet communication pipe are both provided with valve seat sealing surfaces close to one side of the valve cavity, the valve seat sealing surfaces are fixedly installed with valve seats, and the valve flap is fixedly provided with a ball head which slides on the valve seat located at the water inlet passage pipe. The application has the following advantages and effects: the gate valve opening and closing friction can be reduced, the local excessive wear of the gate valve can be avoided, and the wear resistance and durability of the whole valve can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gate valves, in particular to a single-piece high-performance gate valve with a ball head type support seat type guide. BACKGROUND

[0002] In the field of power station valves, gate valves are key isolation valves used to open and close the flow of medium. Traditional gate valve structures are divided into single gate plate and double gate plate structures, but both have certain limitations. The single gate plate structure is a tight type structure in which the valve disc and the valve seat are matched, and during opening and closing, it is easy to cause jamming, which affects the normal use and sealing performance of the valve. Moreover, under complex working conditions such as high pressure and high flow rate, the stability of the valve disc is insufficient, which may cause the valve to close tightly, thereby causing medium leakage, which poses a risk to production and safety. At the same time, the sealing surface between the valve disc and the valve seat of the traditional single valve plate is more prone to wear, and after frequent opening and closing or long-term use, the sealing performance will decrease, increasing the valve maintenance cost and maintenance frequency. The double gate plate structure gate valve has a double disc type valve disc, which has many parts and a complex structure, and the double valve disc is large in size, resulting in a large valve design volume and inconvenience in maintenance, especially for large-diameter gate valves, the inlet cross-sectional area is large, the flow rate and volume of the medium flowing per unit time are significantly increased, and the total amount of solid particles carried by the medium is also multiplied. At the same time, large-diameter valves are usually applied to the main line or key devices of a factory, and the cost of shutdown maintenance is extremely high. SUMMARY

[0003] The purpose of the present application is to provide a single-piece high-performance gate valve with a ball head type support seat type guide, which has the effect of reducing the opening and closing friction of the gate valve, avoiding local excessive wear of the gate valve, and improving the wear resistance and durability of the entire valve.

[0004] The above technical purpose of the present application is achieved by the following technical scheme: a single-piece high-performance gate valve with a ball head type support seat type guide, comprising a valve body, the valve body is provided with a valve cavity with an upper end opening, the valve body is fixedly installed with a valve cover covering the upper end opening of the valve cavity, the valve body is provided with a water inlet communication pipe and a water outlet communication pipe on both sides respectively, the water inlet communication pipe and the water outlet communication pipe are coaxially arranged and communicated with the valve cavity, a valve rod with the bottom end extending into the valve cavity is slidably arranged on the valve cover, a single-piece valve disc is arranged at the bottom end of the valve rod, the valve disc is used to control the on-off of the water inlet communication pipe and the water outlet communication pipe, the water inlet communication pipe and the water outlet communication pipe are provided with valve seat sealing surfaces on the side close to the valve cavity, the valve seat sealing surfaces are fixedly installed with valve seats, a ball head that slides on the valve seat at the water inlet passage pipe is fixedly arranged on one side end surface of the valve disc, and the other side end surface of the valve disc is attached to the valve seat at the water outlet passage pipe to disconnect the valve cavity from the water outlet passage pipe.

[0005] By adopting the technical scheme, single-face sealing is realized by single valve seat structure, the problem of welding waste caused by double-face sealing of valve clack and valve seat in traditional gate valve is solved, the valve rod drives the valve clack to slide to open and close the valve, when the valve is opened, the medium starts to flow, the ball head type structure has multi-directional freedom, so that the valve clack can better adapt to the fluid pressure in the valve during movement, and the contact between the valve clack and the valve seat is sliding friction, compared with the direct contact between the valve clack and the valve seat in the traditional structure, the friction is smaller, the required torque when opening or closing the valve is smaller, and the operation of the valve is more smooth and fast.

[0006] Further, the valve seat at the water inlet channel pipe is fixed with a guide rail for embedding and sliding of the ball head part.

[0007] By adopting the technical scheme, the guide rail mechanism is welded on the inlet side valve seat, the structure has a guide slide matched with the ball head type structure of the valve clack, the guide rail provides stable support and guidance for the valve clack, ensures that the valve clack does not deviate or jam during opening, and can effectively guide the movement of the valve clack to prevent the valve clack from vibrating or deviating under the impact of fluid.

[0008] Further, a filter assembly is installed in the water inlet communication pipe, the filter assembly includes a coarse filter plate, a magnetic plate and a fine filter plate arranged in the water inlet communication pipe in sequence, and the distances from the valve cavity to the coarse filter plate, the magnetic plate and the fine filter plate are from long to short.

[0009] By adopting the technical scheme, the magnetic plate is preferably a permanent magnet, which is used to intercept ferromagnetic impurities such as rust and metal scraps, prevent the gate valve structure from being scratched or the guide rail from being stuck, the coarse filter plate is arranged in front of the magnetic plate and used to intercept large-particle impurities such as welding slag and pipeline fragments, thereby reducing the burden of the magnetic plate, and the fine filter plate is arranged behind the magnetic plate and used to capture non-magnetic fine particles, so that a gradient interception structure is adopted, the system pressure drop is small and far lower than that of a single-stage precision filter screen.

[0010] Further, the coarse filter plate and the fine filter plate are fixedly installed in the water inlet communication pipe, a rotating shaft is rotatably connected between the middle portions of the coarse filter plate and the fine filter plate, a impeller is fixed to one end of the rotating shaft away from the fine filter plate, and two groups of first scrapers are fixed to the coarse filter plate and the fine filter plate.

[0011] By adopting the technical scheme, the impeller rotates under the impact of water flow, and then the impeller, the rotating shaft and the first scrapers rotate, the first scrapers directly scrape off the attachments on the surfaces of the coarse filter plate and the fine filter plate, prevent impurities from accumulating, and also keep the pores of the filter plates unblocked, so as to ensure the water flow and avoid the decrease of operation efficiency caused by blockage; a blowdown valve is installed at the bottom of the front side of the water inlet communication pipe, and regular automatic deslagging is realized.

[0012] Further, the shaft sleeve is sleeved with a sleeve, and the magnetic plates are circumferentially arranged on the sleeve.

[0013] By adopting the above technical scheme, the multiple magnetic plates are arranged in parallel with the water flow direction, so that the adsorption area of the ferromagnetic impurities in the water inlet communication pipe is increased, the interception efficiency is effectively improved, and the resistance is minimized to stabilize the system pressure drop within the design range.

[0014] Further, the shaft sleeve is sleeved with a sleeve, and the magnetic plates are circumferentially arranged on the sleeve.

[0015] By adopting the above technical scheme, the multiple magnetic plates are arranged in parallel with the water flow direction, so that the adsorption area of the ferromagnetic impurities in the water inlet communication pipe is increased, the interception efficiency is effectively improved, and the resistance is minimized to stabilize the system pressure drop within the design range.

[0016] Further, the shaft sleeve is sleeved with a sleeve, and the magnetic plates are circumferentially arranged on the sleeve.

[0017] By adopting the above technical scheme, the multiple magnetic plates are arranged in parallel with the water flow direction, so that the adsorption area of the ferromagnetic impurities in the water inlet communication pipe is increased, the interception efficiency is effectively improved, and the resistance is minimized to stabilize the system pressure drop within the design range.

[0018] Further, the shaft sleeve is sleeved with a sleeve, and the magnetic plates are circumferentially arranged on the sleeve.

[0019] By adopting the technical scheme, the hand wheel is rotated to drive the worm to rotate, the worm drives the worm wheel and the screw rod to rotate, thereby driving the connecting rod to slide in the horizontal direction, when the hand wheel is not rotated, the worm wheel and the worm are static screw rods, and the self-locking performance of the static screw rods is more reliable, and the two-stage reduction is more suitable for manual operation.

[0020] Further, the application is characterized in that the water inlet communication pipe is provided with a flow baffle inside, the flow baffle is adapted to the cross section of the water inlet communication pipe, the flow baffle comprises a lower baffle fixed inside the water inlet communication pipe and an upper baffle rotatably connected inside the water inlet communication pipe, the bottom end of the upper baffle is in contact with the upper end of the lower baffle, and a movable shaft rotatably extending into the cavity of the water inlet communication pipe is fixed to the bottom end of the upper baffle, and a synchronous assembly connected between the movable shaft and the screw rod is used to drive the movable shaft to rotate.

[0021] By adopting the technical scheme, the flow baffle is in an open state when the gate valve is working, that is, the upper baffle and the lower baffle are not in the same horizontal plane, and an opening is left between the upper baffle and the inner wall of the water inlet communication pipe for fluid to pass through; when the deslagging work on the coarse filter plate, the magnetic plate and the fine filter plate is performed, the synchronous assembly drives the movable shaft and the upper baffle to rotate, so that the upper baffle and the lower baffle are finally located in the same plane and cover the cross section of the water inlet communication pipe, and the upper baffle and the inner wall of the water inlet communication pipe are in a closed state, so that the water flow in the water inlet communication pipe can directly wash away the impurities scraped off the coarse filter plate, the magnetic plate and the fine filter plate, the sewage carrying the impurities is discharged from the blow-off valve, and the sewage is prevented from entering the gate valve to scratch and reduce the wear of the structure of the gate valve; the obliquely arranged flow baffle can effectively guide the sewage to the water inlet communication pipe and discharge the sewage from the blow-off valve.

[0022] Further, the application is characterized in that the synchronous assembly comprises a first gear fixed to the end of the screw rod away from the driving assembly, a gear ring rotatably connected outside the water inlet communication pipe and engaged with the first gear, a second fixed plate fixed outside the water inlet communication pipe, a synchronous shaft rotatably connected to the second fixed plate, a second gear engaged with the gear ring and fixed to one end of the synchronous shaft, and a first bevel gear fixed to the other end of the synchronous shaft.

[0023] By adopting the technical scheme, when the hand wheel is rotated to rotate the screw rod, the first gear at the end of the screw rod drives the gear ring to rotate, and then the gear ring drives the second gear and the synchronous shaft to rotate, the synchronous shaft rotates to drive the second bevel gear to rotate through the first bevel gear at the other end, and then the movable shaft rotates to drive the upper baffle to rotate in the water inlet communication pipe, so that the upper baffle and the lower baffle are located in the same plane and cover the cross section of the water inlet communication pipe to close the water inlet communication pipe, and the deslagging of the magnetic plate and the closing of the flow baffle are synchronously performed, thereby effectively improving the deslagging work efficiency.

[0024] The application has the following beneficial effects:

[0025] 1. The ball-shaped structure of the valve disc has multiple degrees of freedom, which allows the valve disc to better adapt to the fluid pressure inside the valve during movement. In addition, the contact between the valve disc and the valve seat is a sliding friction. Compared with the traditional direct contact between the valve disc and the valve seat, this friction method has less friction, reduces the torque required to open or close the valve, and makes the valve operation smoother and faster.

[0026] 2. The guide rail structure has a guide slide that matches the ball head structure of the valve disc. The guide rail provides stable support and guidance for the valve disc, ensuring that the valve disc will not deviate or get stuck during the opening process. It can also effectively guide the movement of the valve disc and prevent the valve disc from vibrating or deviating under fluid impact.

[0027] 3. The magnetic plate intercepts ferromagnetic impurities, preventing the gate valve structure from being scratched or the guide rail from getting stuck. The magnetic plate is pre-coarse filter plate to intercept large particles of impurities and reduce the burden on the magnetic plate. The magnetic plate is post-fine filter plate to capture non-magnetic fine particles. The gradient interception structure is adopted, which makes the system pressure drop small and much lower than that of a single-stage precision filter while filtering impurities.

[0028] 4. The impeller rotates under the impact of the water flow, which in turn causes the impeller, shaft and first scraper to rotate. The rotation of the first scraper directly scrapes off the deposits on the surface of the coarse and fine filter plates, preventing the accumulation of impurities. At the same time, it keeps the filter plate pores open, ensuring the water flow and avoiding the decrease in operating efficiency due to blockage.

[0029] 5. Use the second scraper to scrape off the remaining impurities on the magnetic plate until they fall into the water inlet pipe and are washed away by the water flow. The water carrying the impurities flows out from the drain valve at the bottom of the water inlet pipe to complete the periodic sludge removal work.

[0030] 6. The baffle plate is used to block the inlet water connecting pipe, so that the water flow in the inlet water connecting pipe can directly flush away the impurities scraped off the coarse filter plate, magnetic plate and fine filter plate. The sewage carrying impurities is discharged from the drain valve, which prevents sewage from entering the gate valve and scratching the gate valve structure and reduces wear. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the internal cross-sectional structure of the valve body in this invention.

[0033] Figure 2 This is a schematic diagram of the connection relationship between the valve seat and the guide rail in this invention.

[0034] Figure 3 is a schematic view of the internal section structure of the water inlet communication pipe in the present application.

[0035] Figure 4 is a schematic view of the connection relationship between the cover box and the water inlet communication pipe in the present application.

[0036] Figure 5 is a schematic view of the connection relationship between the synchronous assembly and the water inlet communication pipe in the present application.

[0037] Figure 6 is a schematic view of the internal structure of the water inlet communication pipe in the present application.

[0038] Figure 7 is Figure 3 an enlarged view of A in the figure.

[0039] In the figure, 1 is a valve body; 2 is a valve cavity; 3 is a valve cover; 4 is a water inlet communication pipe; 5 is a water outlet communication pipe; 6 is a valve rod; 7 is a valve flap; 8 is a valve seat sealing surface; 9 is a valve seat; 10 is a ball head; 11 is a guide rail; 12 is a coarse filter plate; 13 is a magnetic plate; 14 is a fine filter plate; 15 is a rotating shaft; 16 is an impeller; 17 is a first scraper; 18 is a sleeve; 19 is a sliding cylinder; 20 is a fixed rod; 21 is a second scraper; 22 is a scraping assembly; 221 is a connecting rod; 222 is a cover plate; 223 is a first fixed plate; 224 is a screw rod; 225 is a worm wheel; 226 is a worm; 227 is a hand wheel; 23 is a movable port; 24 is an inner sliding groove; 25 is a flow baffle; 251 is a lower baffle; 252 is an upper baffle; 253 is a movable shaft; 26 is a synchronous assembly; 261 is a first gear; 262 is a gear ring; 263 is a second fixed plate; 264 is a synchronous shaft; 265 is a second gear; 266 is a first bevel gear; 267 is a second bevel gear; 27 is a cover box. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be described clearly and completely below in combination with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] Embodiment 1, a ball head type support seat type guided single-piece high-performance gate valve, such as Figure 1As shown, including the valve body 1, the valve body 1 is provided with the valve cavity 2 of the upper end opening, the valve body 1 is fixedly installed with the valve cover 3 covering the upper end opening of the valve cavity 2, the valve body 1 is provided with water inlet communication pipe 4 and water outlet communication pipe 5 which are coaxially arranged and communicated with the valve cavity 2 on both sides respectively, the valve cover 3 is slidably provided with the valve rod 6 with the bottom end extending into the valve cavity 2, the valve rod 6 is provided with a single-piece valve flap 7 at the bottom end, the valve flap 7 is used to control the on-off of the water inlet communication pipe 4 and the water outlet communication pipe 5, the valve seat sealing surface 8 is arranged on the side of the water inlet communication pipe 4 and the water outlet communication pipe 5 close to the valve cavity 2, the valve seat 9 is fixedly installed at the valve seat sealing surface 8, the ball head 10 is fixed on the side end surface of the valve flap 7 and slides on the valve seat 9 at the water inlet passage pipe, the other side end surface of the valve flap 7 is attached to the valve seat 9 at the water outlet passage pipe, which disconnects the valve cavity 2 and the inner cavity of the water outlet passage pipe to realize the unilateral sealing of the gate valve; during installation, the coaxiality of the valve and the pipeline should be ensured to prevent uneven force on the valve due to improper installation; the outer thread is arranged on the upper end of the valve rod 6, the threaded sleeve is rotatably arranged on the upper end of the valve body 1 and matched with the outer thread of the valve rod 6, the hand wheel 227 or other driving devices are fixedly arranged outside the threaded sleeve, during operation, the threaded sleeve is rotated through the hand wheel 227 to make the valve rod 6 slide and drive the valve flap 7 to slide to open and close the valve, and the medium flows when the valve is opened, and the ball head 10 type structure has multidirectional freedom, which makes the valve flap 7 better adapt to the fluid pressure in the valve during movement.

[0042] As shown, Figure 2 The valve seat 9 at the water inlet passage pipe is fixedly provided with a guide rail 11 for the partial embedding and sliding of the ball head 10, the guide rail 11 is welded on the inlet side valve seat 9, the structure of the guide rail 11 is matched with the ball head 10 type structure of the valve flap 7, the guide rail 11 provides stable support and guidance for the valve flap 7, ensures that the valve flap 7 does not deviate or jam during opening, the material of the guide rail 11 is selected from wear-resistant and corrosion-resistant materials, and the material is the same as the valve seat 9 to improve the service life and reliability, the surface of the ball head 10 is precisely machined to ensure the shape accuracy and surface roughness to ensure good cooperation with the guide seat.

[0043] As shown, Figure 3 , 6As shown, the water inlet communication pipe 4 is provided with a filter assembly, which comprises a coarse filter plate 12, a magnetic plate 13 and a fine filter plate 14 arranged in the water inlet communication pipe 4 in sequence, the coarse filter plate 12, the magnetic plate 13 and the fine filter plate 14 are arranged from long to short from the valve cavity 2, the magnetic plate 13 is preferably made of permanent magnet material (such as neodymium iron boron or ferrite), which is used to intercept ferromagnetic impurities such as rust and metal scraps, so as to prevent the gate valve structure from being scratched or the guide rail 11 from being stuck, the coarse filter plate 12 is arranged in front of the magnetic plate 13, which is used to intercept large-particle impurities such as welding slag and pipeline fragments, so as to reduce the burden of the magnetic plate 13, and the fine filter plate 14 is arranged behind the magnetic plate 13, which is used to capture non-magnetic small particles, and the gradient interception structure is adopted, so that the system pressure drop is small and far lower than that of a single-stage precision filter screen.

[0044] As a further arrangement of the present application, the magnetic plate 13 is wrapped with a stainless steel shell outside to protect the internal magnet from direct contact with the water flow; the end of the magnetic plate 13 is fixed relative to the inner wall of the water inlet communication pipe 4 by a detachable structure, which can be easily taken out for cleaning.

[0045] As shown in Figure 3 , the coarse filter plate 12 and the fine filter plate 14 are fixedly installed in the water inlet communication pipe 4, the middle part between the coarse filter plate 12 and the fine filter plate 14 is rotatably connected with a rotating shaft 15, one end of the rotating shaft 15 away from the fine filter plate 14 is fixedly provided with an impeller 16, and the rotating shaft 15 is fixedly provided with two groups of first scrapers 17 which are respectively attached to the coarse filter plate 12 and the fine filter plate 14, the impeller 16 rotates under the impact of the water flow, and then the impeller 16, the rotating shaft 15 and the first scrapers 17 rotate, the first scrapers 17 directly scrape off the attachments on the surfaces of the coarse filter plate 12 and the fine filter plate 14, prevent impurities from accumulating, and also keep the pores of the filter plates unblocked, so as to ensure the water flow and avoid the decrease of running efficiency caused by blockage.

[0046] As a further arrangement of the present application, a blowdown valve is installed and connected at the bottom of the front side of the water inlet communication pipe 4, which realizes the regular deslagging work.

[0047] As a further arrangement of the present application, the rotating shaft 15 is sleeved with a sleeve 18, a plurality of magnetic plates 13 are circumferentially arranged around the sleeve 18, and the magnetic plates 13 away from the sleeve 18 are fixed to the inner wall of the water inlet communication pipe 4, the arrangement direction of the plurality of magnetic plates 13 is parallel to the water flow direction, which can increase the adsorption area of the ferromagnetic impurities in the water inlet communication pipe 4, effectively improve the interception efficiency, and also can reduce the resistance to the greatest extent, so as to stabilize the system pressure drop within the design range.

[0048] As shown in Figure 3 , 6As shown, the rotating shaft 15 is sleeved with a sliding cylinder 19, and a plurality of fixed rods 20 are fixed on the sliding cylinder 19 in the circumferential direction. The second scraper 21 is fixed on the end of the fixed rod 20 away from the sliding cylinder 19. The second scraper 21 is arranged in a V shape, and the two sides of the second scraper 21 are respectively attached to the end faces of the two adjacent magnetic plates 13. The water inlet communication pipe 4 is externally provided with a scraping assembly 22 for driving the sliding cylinder 19 to slide on the rotating shaft 15. During the slagging work, the magnetic plates 13 are temporarily demagnetized. The demagnetization work is specifically as follows: an electromagnetic coil is wound on the outer wall of the water inlet communication pipe 4 and is connected to direct current. The current direction is adjusted to make the external magnetic field opposite to the magnetic field of the permanent magnet. The reverse magnetic field temporarily offsets or weakens the external magnetic field of the permanent magnet (which can be controlled by measurement), thereby reducing the adsorption force, so that the iron filings and other impurities fall off (the strength of the reverse magnetic field is lower than the coercive force of the permanent magnet. It only neutralizes the external magnetic field, but does not permanently change the magnetic domain structure inside the permanent magnet. After the coil is removed, the magnetism of the permanent magnet is restored). During the demagnetization period, the sliding cylinder 19 is driven to slide on the rotating shaft 15 in the water inlet communication pipe 4 by the scraping assembly 22, so that the second scraper 21 is driven to slide by the sliding cylinder 19. The second scraper 21 scrapes off the magnetic plates 13 to clean the magnetic plates 13, thereby preventing the impurities on the magnetic plates 13 from accumulating.

[0049] As shown in Figure 7 The water inlet communication pipe 4 is externally provided with a first fixed plate 223, and the first fixed plate 223 is rotationally connected with a screw rod 224. The upper end of the connecting rod 221 is threadedly connected to the screw rod 224. The first fixed plate 223 is provided with a driving assembly for driving the screw rod 224 to rotate. The screw rod 224 drives the connecting rod 221 to slide in the horizontal direction when the screw rod 224 rotates. During this period, the connecting rod 221 drives the cover plate 222 to slide horizontally at the opening 23, and the cover plate 222 slides in the sliding groove on both sides to cover the opening 23, so that the water inlet communication pipe 4 is always kept in a sealed state to prevent the medium from flowing out. When the connecting rod 221 slides, the sliding cylinder 19 and the second scraper 21 slide, and the residual impurities on the magnetic plates 13 are scraped off and fall into the water inlet communication pipe 4, and the water flow carrying the impurities flows out from the sewage valve arranged at the bottom of the water inlet communication pipe 4 to complete the regular slagging work.

[0050] As a further feature of the present invention, the drive assembly includes a worm gear 225 fixed to the end of the screw 224, and a worm 226 meshing with the worm gear 225 is rotatably connected to the first fixed plate 223. A handwheel 227 is fixed to the end of the worm 226. By rotating the handwheel 227, the worm 226 is driven to rotate. The rotation of the worm 226 drives the worm gear 225 and the screw 224 to rotate, thereby driving the connecting rod 221 to slide in the horizontal direction. When the handwheel 227 is not rotated, the worm gear 225 and the worm 226 are static screw 224, which improves the self-locking performance and the two-stage reduction is more suitable for manual operation.

[0051] like Figure 3 , 6 As shown, a baffle plate 25 is inclinedly installed inside the inlet connecting pipe 4. The baffle plate 25 is adapted to the inner cross section of the inlet connecting pipe 4. The baffle plate 25 includes a lower baffle 251 whose bottom end is fixed inside the inlet connecting pipe 4 and an upper baffle 252 rotatably connected inside the inlet connecting pipe 4. The bottom end of the upper baffle 252 contacts the upper end of the lower baffle 251 and is fixed with a movable shaft 253 that rotatably extends out of the inner cavity of the inlet connecting pipe 4. A synchronization component 26 that drives the movable shaft 253 to rotate is connected between the movable shaft 253 and the screw 224. The baffle plate 25 is in the open state when the gate valve is working, that is, the upper baffle 252 and the lower baffle 251 are not on the same horizontal plane. An opening is left between the upper baffle 252 and the inner wall of the inlet connecting pipe 4 for fluid to pass through; for coarse filtration. When the slag removal is working on plate 12, magnetic plate 13 and fine filter plate 14, the synchronous component 26 drives the movable shaft 253 and the upper baffle 252 to rotate (at this time, the inlet water connecting pipe 4 is not in a water-filled state). Finally, the upper baffle 252 and the lower baffle 251 are located on the same plane and cover the cross section of the inlet water connecting pipe 4. The upper baffle 252 and the inner wall of the inlet water connecting pipe 4 are in a closed state, so that when water flows through the inlet water connecting pipe 4, the water flow can directly wash away the impurities scraped off on the coarse filter plate 12, magnetic plate 13 and fine filter plate 14. The sewage carrying the impurities is discharged from the drain valve, which avoids the sewage entering the gate valve and scratching the gate valve structure and reducing wear. The inclined baffle 25 can effectively guide the sewage into the inlet water connecting pipe 4 and discharge it from the drain valve.

[0052] like Figure 4 , 5As shown, the synchronization assembly 26 comprises a first gear 261 fixed to the end of the screw 224 away from the driving assembly, the water inlet communication pipe 4 is externally rotatably connected with a gear ring 262 engaged with the first gear 261, the water inlet communication pipe 4 is externally fixed with a second fixed plate 263, the second fixed plate 263 is rotatably connected with a synchronization shaft 264, the synchronization shaft 264 is fixed at one end with a second gear 265 engaged with the gear ring 262 and at the other end with a first bevel gear 266, the movable shaft 253 is fixed at the end of the water inlet communication pipe 4 with a second bevel gear 267 engaged with the first bevel gear 266, when the screw 224 is rotated by rotating the hand wheel 227 to drive the second scraper 21 to remove the residual impurities on the magnetic plate 13 in the demagnetization (at this time, the water inlet communication pipe 4 is not in the water state), the first gear 261 at the end of the screw 224 drives the gear ring 262 to rotate, and then the gear ring 262 drives the second gear 265 and the synchronization shaft 264 to rotate, the synchronization shaft 264 rotates to drive the second bevel gear 267 to rotate through the first bevel gear 266 at the other end, and then the movable shaft 253 rotates to drive the upper baffle 252 to rotate in the water inlet communication pipe 4, to the upper baffle 252 and the lower baffle 251 located in the same plane, covering the cross section of the water inlet communication pipe 4 to close the water inlet communication pipe 4, so that the magnetic plate 13 and the flow baffle 25 are closed synchronously; after the flow baffle 25 closes the water inlet communication pipe 4, water flow is introduced into the water inlet communication pipe 4, the water flow washes the impeller 16, and the first scraper 17 rotates to scrape the impurities on the coarse filter plate 12 and the fine filter plate 14 (at this time, the impurities on the magnetic plate 13 have been scraped off by the second scraper 21, and the impurities are located in the water inlet communication pipe 4), and finally the sewage carrying the impurities is discharged from the sewage valve, avoiding the sewage entering the gate valve to scratch the structure of the gate valve and reduce the wear.

[0053] As a further setting of the application, by adjusting the size ratio of the second gear 265, the first bevel gear 266 and the second bevel gear 267, when the gear ring 262 rotates, the movable shaft 253 and the upper baffle 252 are driven to rotate a specified angle to close the water inlet communication pipe 4, such as increasing the size of the second bevel gear 267, so that the second bevel gear 267 and the movable shaft 253 rotate a smaller angle when the gear ring 262 transmits the same linear displacement.

[0054] As a further setting of the application, the structure part of the scraping assembly 22 and the synchronization assembly 26 located outside the water inlet communication pipe 4 is covered with a cover box 27 to prevent dust pollution and affect the performance.

Claims

1. A single-piece high-performance gate valve with a ball-head type support seat and guide, comprising a valve body (1), wherein the valve body (1) has a valve cavity (2) with an upper opening, and a valve cover (3) is fixedly installed on the valve body (1) covering the upper opening of the valve cavity (2), and an inlet connecting pipe (4) and an outlet connecting pipe (5) are respectively provided on both sides of the valve body (1) and are coaxially arranged with the valve cavity (2), and a valve stem (6) with its bottom end extending into the valve cavity (2) slides on the valve cover (3), and a single-piece valve disc (7) is provided at the bottom end of the valve stem (6), the valve disc (7) being used to control the opening and closing of the inlet connecting pipe (4) and the outlet connecting pipe (5), characterized in that: Both the inlet pipe (4) and the outlet pipe (5) are provided with valve seat sealing surfaces (8) on the side near the valve cavity (2). A valve seat (9) is fixedly installed on the valve seat sealing surface (8). A ball head (10) that slides on the valve seat (9) located at the inlet pipe (4) is fixed on one end face of the valve disc (7). The other end face of the valve disc (7) is in contact with the valve seat (9) located at the inlet pipe (4), thus disconnecting the valve cavity (2) from the inner cavity of the inlet pipe (4). A filter assembly is installed inside the water inlet pipe (4). The filter assembly includes a coarse filter plate (12), a magnetic plate (13), and a fine filter plate (14) arranged sequentially inside the water inlet pipe (4). The coarse filter plate (12) and the fine filter plate (14) are fixedly installed inside the water inlet pipe (4). A rotating shaft (15) is rotatably connected between the middle of the coarse filter plate (12) and the fine filter plate (14). A sleeve (18) is sleeved around the rotating shaft (15). The magnetic plate (13) rotates around the sleeve (18). Multiple magnetic plates (13) are arranged circumferentially. The side of the magnetic plate (13) away from the sleeve (18) is fixed to the inner wall of the water inlet connecting pipe (4). The rotating shaft (15) is sleeved and slidably fitted with a sliding cylinder (19). Multiple fixing rods (20) are fixed circumferentially on the sliding cylinder (19). A second scraper (21) is fixed at the end of the fixing rod (20) away from the sliding cylinder (19). The second scraper (21) is set in a V-shape. The two sides of the second scraper (21) are respectively attached to the end faces of two adjacent magnetic plates (13). A scraping assembly (22) is provided outside the water inlet connecting pipe (4) to drive the sliding cylinder (19) to slide on the rotating shaft (15). During the slag discharge operation, the magnetic plate (13) is briefly demagnetized. During the demagnetization period, the scraping assembly (22) drives the sliding cylinder (19) to slide outside the rotating shaft (15) inside the water inlet connecting pipe (4), thereby the sliding cylinder (19) drives the second scraper (21) to slide, scraping off the magnetic plate (13) to clean the magnetic plate (13). A baffle plate (25) is inclinedly provided inside the water inlet connecting pipe (4).

2. The single-piece high-performance gate valve with ball-head type support seat and guide according to claim 1, characterized in that: A guide rail (11) is fixed on the valve seat (9) located at the water inlet connecting pipe (4) for the ball head (10) to be partially embedded and slid.

3. The single-piece high-performance gate valve with ball-head type support seat and guide according to claim 1, characterized in that: The distances between the coarse filter plate (12), the magnetic plate (13), and the fine filter plate (14) and the valve chamber (2) decrease from long to short.

4. A single-piece high-performance gate valve with ball-head type support seat and guide according to claim 1, characterized in that: An impeller (16) is fixed at one end of the rotating shaft (15) away from the fine filter plate (14), and two sets of first scrapers (17) are fixed on the rotating shaft (15) respectively attached to the coarse filter plate (12) and the fine filter plate (14).

5. A single-piece high-performance gate valve with ball-head type support seat and guide according to claim 1, characterized in that: The water inlet connecting pipe (4) is provided with a movable port (23) and inner sliding grooves (24) located on both sides of the movable port (23). The scraping component (22) includes a connecting rod (221) fixed to the sliding cylinder (19) and extending from the movable port (23). The connecting rod (221) is fixed with a cover plate (222) covering the movable port (23). The cover plate (222) slides in the inner sliding groove (24) on both sides. A first fixing plate (223) is fixedly connected to the outside of the water inlet connecting pipe (4). The first fixing plate (223) is rotatably connected to a screw (224). The upper end of the connecting rod (221) is threaded to the screw (224). A driving component for driving the screw (224) to rotate is provided on the first fixing plate (223).

6. A single-piece high-performance gate valve with ball-head type support seat and guide according to claim 5, characterized in that: The drive assembly includes a worm gear (225) fixed to the end of the screw (224), and a worm (226) meshing with the worm gear (225) is rotatably connected to the first fixing plate (223), and a handwheel (227) is fixed to the end of the worm (226).

7. A single-piece high-performance gate valve with ball-head type support seat and guide according to claim 6, characterized in that: The baffle plate (25) is adapted to the inner cross section of the water inlet connecting pipe (4). The baffle plate (25) includes a lower baffle plate (251) fixed in the water inlet connecting pipe (4) and an upper baffle plate (252) rotatably connected in the water inlet connecting pipe (4). The bottom end of the upper baffle plate (252) contacts the upper end of the lower baffle plate (251) and is fixed with a movable shaft (253) that rotatably extends out of the inner cavity of the water inlet connecting pipe (4). A synchronous component (26) that drives the movable shaft (253) to rotate is connected between the movable shaft (253) and the screw (224).

8. A single-piece high-performance gate valve with ball-head type support seat and guide according to claim 7, characterized in that: The synchronization component (26) includes a first gear (261) fixed to the end of the screw (224) away from the drive component. A gear ring (262) meshing with the first gear (261) is rotatably connected to the outside of the water inlet pipe (4). A second fixing plate (263) is fixed to the outside of the water inlet pipe (4). A synchronization shaft (264) is rotatably connected to the second fixing plate (263). A second gear (265) meshing with the gear ring (262) is fixed to one end of the synchronization shaft (264), and a first bevel tooth (266) is fixed to the other end. A second bevel tooth (267) meshing with the first bevel tooth (266) is fixed to the end of the movable shaft (253) extending out of the outside of the water inlet pipe (4).

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