Throttling cut-off emptying valve

Abstract

The throttling cut-off emptying valve comprises a valve body, a valve cover, a valve rod, a valve clack, a valve seat and a valve sleeve, the valve cover is installed on the valve body, an inlet flow channel and an outlet flow channel are formed in the two ends of the valve body, an overflowing opening is formed between the inlet flow channel and the outlet flow channel, the valve seat is installed on the overflowing opening, and the valve sleeve is clamped between the valve cover and the valve seat. A plurality of throttling holes are formed in the peripheral side of the valve sleeve, the valve deck penetrates through the valve deck and extends into the valve body, the valve clack is installed at the inner end of the valve rod, and the periphery of the valve clack is tightly attached to the inner periphery of the valve sleeve. The filter screen is installed at the end, away from the valve clack, of the valve seat, the filter screen comprises a flow guide part with the hemispherical section, a flow blocking part with the inverted-U-shaped section and an annular connecting part, the flow guide part is arranged in a protruding mode towards the lower end, and the annular connecting part is detachably connected to the valve seat. According to the valve, fluid media can be filtered, solid particles in fluid are prevented from damaging the sealing face of the valve seat and the valve clack, and therefore the good sealing performance is guaranteed when the valve is closed.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a throttling, shut-off and venting valve. Background Art

[0002] The throttling, shut-off and venting valve is a double-sealed valve, which is mainly used in the pipelines of petroleum, natural gas, coal gas, liquefied oil and gas, etc., and is usually used for regulation, control or cutting. This type of valve is a new type of throttling, shut-off and venting product, with multi-stage throttling effect, obvious throttling effect, reliable sealing, easy operation and maintenance, etc.

[0003] The existing throttling stop vent valve has made great progress in the aspects of valve throttling, cutting, balancing hole setting to reduce operating torque, combined sealing, etc. The throttling stop vent valve usually includes a valve body, a valve sleeve, a valve disc, a valve stem, a handwheel, a valve cover, a packing and a packing pressure plate, wherein the valve sleeve is located in the inner cavity of the valve body, and the side wall of the valve sleeve has a plurality of throttling holes connected to the flow channel in the inner cavity of the valve body, the valve seat is fixedly arranged at the lower end of the valve sleeve, the valve disc is slidably fitted in the valve sleeve, and the lower end of the valve disc is provided with a sealing surface that is mutually sealed with the valve seat below the throttling hole of the valve sleeve, one end of the valve stem is connected to the valve disc, and the other end extends from the valve cover to be connected to the handwheel, and the packing is filled in the stuffing box formed by the valve cover and the valve stem. Since the existing throttling stop vent valve does not have a filtering structure, the presence of certain solid particles in the fluid can easily scratch the sealing surface of the valve seat and the valve disc, thereby causing the sealing effect to deteriorate. Therefore, it is necessary to improve the structure. Summary of the invention

[0004] The object of the present invention is to provide a throttling stop vent valve, which can filter the fluid medium to prevent solid particles in the fluid from damaging the sealing surface of the valve seat and the valve disc, thereby ensuring good sealing when the valve is closed and improving the service life of the valve.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a throttling stop vent valve, comprising a valve body, a valve cover, a valve stem, a valve disc, a valve seat and a valve sleeve, wherein the valve cover is mounted on the valve body, an inlet flow channel and an outlet flow channel are arranged at both ends of the valve body, a flow port is arranged between the inlet flow channel and the outlet flow channel, the valve seat is mounted on the flow port, the valve sleeve is clamped between the valve cover and the valve seat, a plurality of throttling holes are arranged on the circumference of the valve sleeve, the valve cover penetrates the valve cover and extends into the interior of the valve body, The valve disc is installed at the inner end of the valve stem, and the outer periphery of the valve disc is tightly fitted with the inner periphery of the valve sleeve; a filter screen is also included, which is installed at the end of the valve seat away from the valve disc and is used to filter the medium flowing through the valve seat. The filter screen includes a guide portion arranged in the middle and with a hemispherical cross-section, a baffle portion arranged at the outer periphery of the guide portion and with an inverted U-shaped cross-section, and an annular connecting portion arranged at the outer periphery of the baffle portion, the guide portion is convex toward the lower end, and the annular connecting portion is detachably connected to the valve seat.

[0006] By adopting the above technical solution, a filter is set on the valve seat to filter the upstream medium, filter out the large particles in the fluid, and avoid damage to the sealing surface of the valve seat and the valve disc, thereby ensuring good sealing when the valve is closed and improving the service life of the valve. In addition, the filter has a special structural design, in which the hemispherical guide part in the middle is convex downward. When the valve is opened, the large particles will accumulate in the inverted U-shaped baffle part on the side under the drive of the water flow, and the guide part in the middle will not adhere to the large particles, thereby ensuring that the fluid can pass through the filter smoothly.

[0007] The present invention is further configured such that a first thread groove is provided at one end of the valve seat away from the valve disc, a pressure ring is threadedly connected to the first thread groove, the pressure ring presses the annular connecting part tightly against the inner end of the first thread groove, and a plurality of push plates are provided at the bottom of the pressure ring.

[0008] By adopting the above technical solution, the rotation of the pressing ring can be easily achieved by operating the push plate, thereby achieving the tightening or loosening of the annular connecting part of the filter screen, which is convenient for the disassembly and assembly of the filter screen.

[0009] The present invention is further configured to include an online sewage discharge device, which includes a sleeve, an opening and closing stop sleeve, a driving assembly and a sewage discharge assembly. The bottom of the valve body is detachably connected to a bottom cover by a fastener. The sleeve is clamped between the valve seat and the bottom cover, and a sealing gasket is respectively arranged between the upper end of the sleeve and the valve seat, and between the lower end of the sleeve and the bottom cover. A sewage cavity is formed in the sleeve, and a plurality of flow windows are opened on the peripheral side of the sleeve. The opening and closing stop sleeve is sleeved on the outer periphery of the sleeve. The driving assembly is installed on the bottom cover to drive the opening and closing stop sleeve to slide up and down, so that it has a closed position that completely blocks the flow window and an open position that completely opens the flow window. The sewage discharge assembly is used to connect the sewage cavity with the outside of the valve when the valve disc abuts against the valve seat and the opening and closing stop sleeve is in the closed position, so that the sewage in the sewage cavity is discharged to the outside.

[0010] By adopting the above technical scheme, it is possible to realize online sewage discharge operation on the sewage inside the valve, that is, there is no need to shut down the machine. It is only necessary to close the valve first (the valve disc is tightly against the valve seat), and then operate the drive component to cause the opening and closing stop sleeve to slide to the closed position, blocking the flow window on the sleeve, so that the sewage chamber is blocked from the inlet flow channel. At this time, the sewage discharge component is operated to cause the sewage chamber to be connected to the outside of the valve, and the sewage in the sewage chamber is discharged to the outside, thereby realizing the function of online sewage discharge, which has the advantages of convenient operation, little impact on project progress and low energy consumption.

[0011] The present invention is further configured as follows: the driving assembly includes a driving rod and a driving disk, the middle portion of the bottom cover is provided with an axial hole, the driving rod passes through the axial hole and rotatably cooperates with the axial hole, the outer periphery of the driving rod is provided with a first sealing ring for sealing with the inner wall of the axial hole, the position of the driving rod corresponding to the upper end of the axial hole is provided with a limiting flange abutting against the inner side of the bottom cover, the position of the driving rod corresponding to the lower end of the axial hole is provided with a retaining spring abutting against the lower outer side of the bottom cover, the driving rod is provided with a threaded section, the driving disk is provided with a screw hole cooperating with the threaded section, a plurality of flow holes are provided on the driving disk in an upward and downward manner, the outer periphery of the driving disk is tightly fitted with the inner periphery of the sleeve, and the outer periphery of the driving disk is provided A plurality of guide protrusions, the inner circumference of the sleeve is provided with a plurality of guide grooves extending vertically, and the guide protrusions are slidably arranged in the corresponding guide grooves; a plurality of first mounting grooves are provided on the outer circumference of the driving disk, a driving magnet is embedded in the first mounting groove, and a first hexagonal screw plug for limiting the driving magnet in the corresponding first mounting groove is threadedly connected in the first mounting groove; a plurality of second mounting grooves corresponding to the first mounting grooves are provided on the inner circumference of the opening and closing stopper sleeve, a follower magnet is embedded in the second mounting groove, and the follower magnet and the corresponding driving magnet attract each other, and second sealing rings for forming a sealing fit with the outer circumference of the sleeve are respectively installed at the upper and lower positions of the inner circumference of the opening and closing stopper sleeve corresponding to the follower magnet.

[0012] By adopting the above technical solution, when it is necessary to adjust the opening and closing stopper sleeve, it is only necessary to rotate the driving rod. Since the driving disk and the driving rod are threadedly matched, and the guide structure between the driving disk and the sleeve causes the driving disk to only move vertically but not rotate circumferentially. Since the driving disk and the opening and closing stopper sleeve are matched by magnetic attraction, when the driving disk moves up and down, the opening and closing stopper sleeve will move vertically with the driving disk, thereby realizing the opening and closing of the flow window on the sleeve, thereby separating the inlet flow channel from the sewage chamber. A valve is added upstream of the modified valve for upstream on-off, which is very convenient to use.

[0013] The present invention is further configured such that a first nut for limiting the lower stroke of the driving disk is threadedly connected to a position corresponding to the bottom of the driving disk on the threaded section of the driving rod, and a gasket is arranged between the lower end of the first nut and the limiting flange; a second nut for limiting the upper stroke of the driving disk is threadedly connected to a position corresponding to the top of the driving disk on the threaded section of the driving rod, and a lock nut is threadedly connected to a position corresponding to the upper end of the second nut on the threaded section, and the lock nut is tightly pressed against the second nut.

[0014] By adopting the above technical solution, a first nut and a second nut are provided to control the upper limit stroke and the lower limit stroke of the drive disk, so that the flow window on the sleeve can be opened and closed accurately, thereby improving the reliability of the structure.

[0015] The present invention is further configured as follows: the sewage discharge component includes an operating cap, an extension section is provided at the lower end of the driving rod, limiting sections are provided on both sides of the extension section, the operating cap is sleeved on the extension section, the operating cap and the extension section form a circumferential linkage, and the operating cap can move vertically along the extension section, a first hemispherical positioning groove and a second hemispherical positioning groove are provided from top to bottom on the limiting section, and a hemispherical positioning protrusion for matching with the first hemispherical positioning groove or the second hemispherical positioning groove is provided on the inner wall of the operating cap; the extension section is provided with a guide hole extending upward along the axial direction, and a plurality of radially extending and connected to the circumferential side of the guide hole are provided on the outer periphery of the limiting flange. A drainage hole, a guide rod extending into the guide hole is integrally provided at the inner end of the operating cap, a drainage channel for connecting the guide hole with the outside is axially penetrated on the guide rod, and a second hexagonal screw plug is threadedly connected at the lower end of the drainage channel, two third sealing rings for sealing with the inner wall of the guide hole are provided on the outer periphery of the guide rod, and when the hemispherical positioning protrusion is matched with the first hemispherical positioning groove, the inner end of the drainage hole is arranged between the two third sealing rings, and the guide rod blocks the drainage hole and the upper end of the guide hole, and when the hemispherical positioning protrusion is matched with the second hemispherical positioning groove, the inner end of the drainage hole is located above the two third sealing rings, and the drainage hole is connected with the upper end of the guide hole.

[0016] By adopting the above technical scheme, after the driving component drives the opening and closing stop sleeve to cause the flow window on the sleeve to close, it is only necessary to pull down the operating cap of the sewage discharge component to switch the fitting state of the hemispherical positioning protrusion on the operating cap and the first hemispherical positioning groove on the operating rod to fit with the second hemispherical positioning groove. At this time, the guide rod on the operating cap moves downward to cause the drainage hole to be connected with the upper end of the guide hole, and the sewage in the sewage chamber is discharged to the outside through the drainage hole, the guide hole and the sewage discharge channel in turn; after the sewage is drained, push the operating cap upward again to cause the hemispherical positioning protrusion on the operating cap to fit with the first hemispherical positioning groove. At this time, the guide rod on the operating cap moves upward to block the drainage hole, and then the opening and closing stop sleeve is driven by the driving component to cause the flow window on the sleeve to open, and the valve can be operated again, and the operation is very simple and convenient.

[0017] The present invention is further configured such that a plurality of thread grooves are arranged on the outer periphery of the operating cap, and an operating rod is threadedly connected to the thread groove.

[0018] By adopting the above technical solution, the operating cap can be driven to rotate by pushing the operating rod, and then the driving rod can be driven to rotate to realize the opening and closing operation of the flow window on the sleeve, which makes the operation easier and more convenient.

[0019] The present invention is further configured such that a first positioning boss is provided at the upper end of the bottom cover, a second positioning boss coaxial with the first positioning boss is provided at the lower end of the valve seat, and both ends of the sleeve are respectively sleeved on the outer peripheries of the first positioning boss and the second positioning boss.

[0020] By adopting the above technical solution, the two ends of the sleeve are positioned, which can improve the stability of the sleeve installation structure.

[0021] The present invention is further configured such that a connecting cavity is provided at the upper end of the valve disc, the lower end of the valve stem extends into the connecting cavity, and a double open ring is clamped on the outer periphery of the valve stem located inside the connecting cavity, a pressure cover is also threadedly connected to the connecting cavity, the pressure cover abuts against the upper end of the double open ring, causing the lower end of the valve stem to be restricted in the connecting cavity, and a pressure-stabilizing hole connected to the connecting cavity is also provided at the lower end of the valve disc.

[0022] By adopting the above technical solution, the linkage connection between the valve stem and the valve disc can be realized, and the connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0023] The present invention is further configured such that the bottom of the valve disc is also connected to a pressure seat via a fastener, an annular sealing ring with an inverted L-shaped cross-section is sandwiched between the pressure seat and the valve disc, an annular sealing groove with an inverted cone-shaped cross-section is provided at the lower end of the annular sealing ring, and an annular sealing protrusion matching the annular sealing groove is provided at the upper end of the valve seat.

[0024] By adopting the above technical solution, an annular sealing ring is arranged at the bottom of the valve disc for sealing with the valve seat. The detachable design of the annular sealing ring allows it to be replaced when it is worn and aged, without replacing the entire valve disc, thereby greatly reducing the subsequent maintenance cost. When the valve is closed, the annular sealing protrusion on the valve seat is squeezed and fitted with the annular sealing groove on the annular sealing ring, which can further improve the sealing performance of the two when they are in cooperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the matching structure of the valve seat and the filter screen of the present invention; Figure 3 It is a structural schematic diagram of the initial state (no sewage discharge) of the online sewage discharge device of the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A; Figure 5 It is a schematic structural diagram of the working state (discharging sewage) of the online sewage discharge device of the present invention; Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the middle B part; Figure 7 It is a cross-sectional view of the matching structure of the operating cap and the extension section of the present invention.

[0026] In the figure: 1, valve body; 2, valve cover; 3, valve stem; 4, valve disc; 5, valve seat; 6, valve sleeve; 7, inlet flow channel; 8, outlet flow channel; 9, flow port; 10, throttle hole; 11, filter screen; 12, flow guide; 13, flow blocking part; 14, annular connecting part; 15, first thread groove; 16, pressure ring; 17, push plate; 18, online sewage discharge device; 19, sleeve; 20, opening and closing stopper sleeve; 2 1. Driving assembly; 22. Drain assembly; 23. Bottom cover; 24. Sealing pad; 25. Sewage chamber; 26. Flow window; 27. Driving rod; 28. Driving disc; 29. ​​Shaft hole; 30. First sealing ring; 31. Limiting flange; 32. Circlip; 33. Threaded section; 34. Screw hole; 35. Flow hole; 36. Guide protrusion; 37. Guide groove; 38. First mounting groove; 39. Driving Moving magnet; 40, first hexagon socket screw plug; 41, second mounting groove; 42, follower magnet; 43, second sealing ring; 44, first nut; 45, gasket; 46, second nut; 47, anti-loosening nut; 48, operating cap; 49, extension section; 50, limiting section; 51, first hemispherical positioning groove; 52, second hemispherical positioning groove; 53, hemispherical positioning protrusion; 54, guide hole; 55, drainage hole; 56, guide rod; 57, sewage discharge channel; 58, second hexagon socket screw plug; 59, third sealing ring; 60, threaded groove; 61, operating rod; 62, first positioning boss; 63, second positioning boss; 64, connecting cavity; 65, double open ring; 66, pressure cover; 67, pressure stabilizing hole; 68, pressure seat; 69, annular sealing ring; 70, annular sealing groove; 71, annular sealing protrusion. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example: As shown in the attached Figures 1 to 7A throttling stop vent valve shown in the figure comprises a valve body 1, a valve cover 2, a valve stem 3, a valve disc 4, a valve seat 5 and a valve sleeve 6, wherein the valve cover 2 is mounted on the valve body 1, and an inlet flow channel 7 and an outlet flow channel 8 are provided at both ends of the valve body 1, and a flow port 9 is provided between the inlet flow channel 7 and the outlet flow channel 8, and the valve seat 5 is mounted on the flow port 9, specifically, the flow port 9 has a circular groove, the valve seat 5 is embedded in the circular groove, and a sealing ring is required to be provided between the valve seat 5 and the circular groove, the valve sleeve 6 is clamped between the valve cover 2 and the valve seat 5, and a plurality of throttling holes 10 are provided on the circumference of the valve sleeve 6, the valve cover 2 penetrates the valve cover 2 and extends into the interior of the valve body 1, the valve disc 4 is mounted on the inner end of the valve stem 3, and the outer periphery of the valve disc 4 is tightly fitted with the inner periphery of the valve sleeve 6, wherein the valve disc 4 and the inner wall of the valve sleeve 6, and between the outer wall of the valve sleeve 6 and the inner wall of the valve body 1. The throttling stop vent valve also includes a filter screen 11, which is made of POM (polyoxymethylene) material, and filter holes are evenly distributed on the filter screen 11. The size of the filter holes can be set according to actual needs. The filter screen 11 is installed at the end of the valve seat 5 away from the valve disc 4, and is used to filter the medium flowing through the valve seat 5. The filter screen 11 includes a guide portion 12 arranged in the middle and having a hemispherical cross-section, a baffle portion 13 arranged on the outer periphery of the guide portion 12 and having an inverted U-shaped cross-section, and an annular connecting portion 14 arranged on the outer periphery of the baffle portion 13. The guide portion 12 is convex toward the lower end, and the annular connecting portion 14 is detachably connected to the valve seat 5. By setting the filter 11 on the valve seat 5, the upstream medium is filtered, and the large particles in the fluid are filtered out to avoid damage to the sealing surface of the valve seat 5 and the valve disc 4, thereby ensuring good sealing when the valve is closed and improving the service life of the valve. In addition, the filter 11 has a special structural design, and the hemispherical guide part 12 in the middle is convex downward. When the valve is opened, the large particles will be accumulated in the inverted U-shaped baffle 13 on the side under the drive of the water flow, and the guide part 12 in the middle will not adhere to the large particles, thereby ensuring that the fluid can pass through the filter 11 smoothly.

[0029] As attached Figure 2 As shown, the end of the valve seat 5 away from the valve disc 4 is provided with a first thread groove 15, and a pressing ring 16 is threadedly connected to the first thread groove 15. The outer periphery of the pressing ring 16 has an external thread matched with the first thread groove 15, and the pressing ring 16 presses the annular connection part 14 against the inner end of the first thread groove 15. A plurality of push plates 17 are provided at the bottom of the pressing ring 16. By operating the push plates 17, the rotation of the pressing ring 16 can be easily realized, thereby realizing the tightening or loosening of the annular connection part 14 of the filter screen 11, which is convenient for the disassembly and assembly of the filter screen 11.

[0030] As attached Figures 3 to 7As shown, the throttling stop vent valve also includes an online sewage discharge device 18, which includes a sleeve 19, an opening and closing stopper sleeve 20, a drive assembly 21 and a sewage discharge assembly 22. The bottom of the valve body 1 is detachably connected to a bottom cover 23 through a fastener (bolts can be used). The sleeve 19 is sandwiched between the valve seat 5 and the bottom cover 23, and a sealing gasket 24 is respectively provided between the upper end of the sleeve 19 and the valve seat 5 and between the lower end of the sleeve 19 and the bottom cover 23. A sewage cavity 25 is formed in the sleeve 19. A plurality of flow windows 26 are provided on the periphery of the sleeve 19, the opening and closing stopper sleeve 20 is sleeved on the outer periphery of the sleeve 19, the driving assembly 21 is installed on the bottom cover 23 to drive the opening and closing stopper sleeve 20 to slide up and down, so that it has a closed position that completely blocks the flow windows 26 and an open position that completely opens the flow windows 26, and the sewage discharge assembly 22 is used to connect the sewage chamber 25 with the outside of the valve when the valve disc 4 abuts against the valve seat 5 and the opening and closing stopper sleeve 20 is in the closed position, so that the sewage in the sewage chamber 25 is discharged to the outside. This design can realize the online sewage discharge operation of the valve internal sewage, that is, there is no need to stop the machine. You only need to close the valve first (the valve disc 4 is tightly against the valve seat 5), and then operate the drive component 21 to cause the opening and closing stopper sleeve 20 to slide to the closed position, blocking the flow window 26 on the sleeve 19, so that the sewage chamber 25 is blocked from the inlet flow channel 7. At this time, operate the sewage discharge component 22 to cause the sewage chamber 25 to be connected with the outside of the valve, and discharge the sewage in the sewage chamber 25 to the outside, thereby realizing the function of online sewage discharge, which has the advantages of convenient operation, little impact on project progress and low energy consumption.

[0031] As attached Figures 3 to 7As shown, the driving assembly 21 includes a driving rod 27 and a driving disk 28. An axial hole 29 is provided through the middle of the bottom cover 23. The driving rod 27 passes through the axial hole 29 and rotates with the axial hole 29. A first sealing ring 30 for sealing with the inner wall of the axial hole 29 is provided on the outer periphery of the driving rod 27. A limiting flange 31 abutting against the inner side of the bottom cover 23 is provided at a position corresponding to the upper end of the axial hole 29 of the driving rod 27. The driving rod 27 and the limiting flange 31 are an integrated structure. A retaining spring 32 abutting against the lower outer side of the bottom cover 23 is installed at a position corresponding to the lower end of the axial hole 29 of the driving rod 27. A threaded section 33 is provided on the driving rod 27. A screw hole 34 cooperating with the threaded section 33 is provided on the driving disk 28. A plurality of flow holes 35 are provided through the driving disk 28 from top to bottom. The outer periphery of the driving disk 28 is tightly fitted with the inner periphery of the sleeve 19. In addition, a plurality of guide protrusions 36 are arranged on the outer periphery of the driving disk 28, and a plurality of guide grooves 37 extending vertically are arranged on the inner periphery of the sleeve 19, and the guide protrusions 36 are slidably arranged in the corresponding guide grooves 37; a plurality of first mounting grooves 38 are arranged on the outer periphery of the driving disk 28, a driving magnet 39 is embedded in the first mounting groove 38, and a first hexagonal screw plug 40 for limiting the driving magnet 39 in the corresponding first mounting groove 38 is connected to the first mounting groove 38 through a thread; a plurality of second mounting grooves 41 corresponding to the first mounting grooves 38 are arranged on the inner periphery of the opening and closing stopper sleeve 20, and a follower magnet 42 is embedded in the second mounting groove 41, and the follower magnet 42 and the corresponding driving magnet 39 attract each other, and second sealing rings 43 for forming a sealing fit with the outer periphery of the sleeve 19 are respectively installed at the upper and lower positions of the inner periphery of the opening and closing stopper sleeve 20 corresponding to the follower magnet 42. When the opening and closing stopper sleeve 20 needs to be adjusted, it is only necessary to rotate the driving rod 27. Since the driving disk 28 is threadedly matched with the driving rod 27, and the guide structure between the driving disk 28 and the sleeve 19 causes the driving disk 28 to only move vertically but not rotate circumferentially. Since the driving disk 28 and the opening and closing stopper sleeve 20 are matched by magnetic attraction, when the driving disk 28 moves up and down, the opening and closing stopper sleeve 20 will move vertically with the driving disk 28, thereby realizing the opening and closing of the flow window 26 on the sleeve 19, thereby separating the inlet flow channel 7 from the sewage chamber 25. A valve is added upstream of the modified valve for upstream on-off, which is very convenient to use.

[0032] As attached Figures 3 to 7As shown, a first nut 44 for constituting a lower stroke limit for the drive disk 28 is threadedly connected to the threaded section 33 of the drive rod 27 at a position corresponding to the lower side of the drive disk 28, and a gasket 45 is arranged between the lower end of the first nut 44 and the limiting flange 31, and a second nut 46 for constituting an upper stroke limit for the drive disk 28 is threadedly connected to the threaded section 33 of the drive rod 27 at a position corresponding to the upper side of the drive disk 28, and a locking nut 47 is threadedly connected to the threaded section 33 at a position corresponding to the upper end of the second nut 46, and the locking nut 47 is tightly abutted against the second nut 46. The first nut 44 and the second nut 46 are arranged to control the upper limit stroke and the lower limit stroke of the drive disk 28, so as to realize the precise opening and closing of the flow window 26 on the sleeve 19 and improve the reliability of the structure.

[0033] As attached Figures 3 to 7As shown, the sewage discharge assembly 22 includes an operating cap 48, an extension section 49 is provided at the lower end of the driving rod 27, and limiting sections 50 are provided on both sides of the extension section 49. The operating cap 48 is sleeved on the extension section 49, and the operating cap 48 and the extension section 49 form a circumferential linkage, and the operating cap 48 can move vertically along the extension section 49. The limiting section 50 is provided with a first hemispherical positioning groove 51 and a second hemispherical positioning groove 52 from top to bottom, and a hemispherical positioning protrusion 53 for matching with the first hemispherical positioning groove 51 or the second hemispherical positioning groove 52 is provided on the inner wall of the operating cap 48, and the hemispherical shape can also be a semi-ellipsoidal shape; the extension section 49 is provided with a guide hole 54 extending upward along the axial direction, and the outer periphery of the limiting flange 31 is provided with a plurality of radially extending and connected to the peripheral side of the guide hole 54 The drainage hole 55 of the operating cap 48 is integrally provided with a guide rod 56 extending into the guide hole 54 at the inner end thereof, a sewage discharge passage 57 for connecting the guide hole 54 with the outside is axially penetrated on the guide rod 56, and a second hexagon socket screw plug 58 is threadedly connected at the lower end of the sewage discharge passage 57, two third sealing rings 59 for sealing with the inner wall of the guide hole 54 are provided on the outer periphery of the guide rod 56, and when the hemispherical positioning protrusion 53 is matched with the first hemispherical positioning groove 51, the inner end of the drainage hole 55 is arranged between the two third sealing rings 59, and the guide rod 56 blocks the drainage hole 55 from the upper end of the guide hole 54, and when the hemispherical positioning protrusion 53 is matched with the second hemispherical positioning groove 52, the inner end of the drainage hole 55 is located above the two third sealing rings 59, and the drainage hole 55 is connected with the upper end of the guide hole 54. After the drive assembly 21 drives the opening and closing stopper sleeve 20 to close the flow window 26 on the sleeve 19, it is only necessary to pull down the operating cap 48 of the sewage discharge assembly 22 to switch the hemispherical positioning protrusion 53 on the operating cap 48 to the first hemispherical positioning groove 51 on the operating rod 61 to fit with the second hemispherical positioning groove 52. At this time, the guide rod 56 on the operating cap 48 moves downward to cause the drainage hole 55 to be connected with the upper end of the guide hole 54, and the sewage in the sewage chamber 25 is discharged to the outside through the drainage hole 55, the guide hole 54 and the sewage discharge channel 57 in turn; after the sewage is drained, the operating cap 48 is pushed upward again to cause the hemispherical positioning protrusion 53 on the operating cap 48 to fit with the first hemispherical positioning groove 51. At this time, the guide rod 56 on the operating cap 48 moves upward to block the drainage hole 55, and then the opening and closing stopper sleeve 20 is driven by the drive assembly 21 to cause the flow window 26 on the sleeve 19 to open, and the valve can be operated again, which is very simple and convenient to operate.

[0034] As attached Figures 3 to 7As shown, the outer periphery of the operating cap 48 is provided with a plurality of thread grooves 60, and the thread grooves 60 are threadedly connected with an operating rod 61, that is, the operating rod 61 is provided with an external thread that matches the thread grooves 60. By pushing the operating rod 61, the operating cap 48 can be driven to rotate, and then the driving rod 27 can be driven to rotate to realize the opening and closing operation of the flow window 26 on the sleeve 19, and the operation is easier and more convenient.

[0035] As attached Figure 3 As shown, the upper end of the bottom cover 23 is integrally provided with a first positioning boss 62, the lower end of the valve seat 5 is integrally provided with a second positioning boss 63 coaxial with the first positioning boss 62, and the two ends of the sleeve 19 are respectively sleeved on the outer circumference of the first positioning boss 62 and the second positioning boss 63. Positioning the two ends of the sleeve 19 can improve the stability of the installation structure of the sleeve 19.

[0036] As attached Figure 1 As shown, the upper end of the valve disc 4 is provided with a connecting cavity 64, the lower end of the valve stem 3 extends into the connecting cavity 64, and the outer periphery of the valve stem 3 located inside the connecting cavity 64 is clamped with a double open ring 65, and the connecting cavity 64 is also threadedly connected with a gland 66, and the gland 66 abuts against the upper end of the double open ring 65, so that the lower end of the valve stem 3 is restricted in the connecting cavity 64, and the lower end of the valve disc 4 is also provided with a pressure stabilizing hole 67 connected to the connecting cavity 64. It can realize the linkage connection between the valve stem 3 and the valve disc 4, and the connection structure is simple and reliable, and it is very convenient to disassemble and assemble.

[0037] As attached Figure 1 As shown, the bottom of the valve disc 4 is also connected to a pressure seat 68 through a fastener (screws may be used), and an annular sealing ring 69 with an inverted L-shaped cross section is sandwiched between the pressure seat 68 and the valve disc 4. The lower end of the annular sealing ring 69 is provided with an annular sealing groove 70 with an inverted cone cross section, and the upper end of the valve seat 5 is provided with an annular sealing protrusion 71 that matches the annular sealing groove 70. The annular sealing ring 69 is provided at the bottom of the valve disc 4 for sealing with the valve seat 5. The detachable design of the annular sealing ring 69 allows it to be replaced when it is worn and aged, without replacing the entire valve disc 4, which greatly reduces the subsequent maintenance cost, and when the valve is closed, the annular sealing protrusion 71 on the valve seat 5 is squeezed and matched with the annular sealing groove 70 on the annular sealing ring 69, which can further improve the sealing performance of the two when they are matched.

Claims

1. A throttling stop vent valve, comprising a valve body (1), a valve cover (2), a valve stem (3), a valve disc (4), a valve seat (5) and a valve sleeve (6), wherein the valve cover (2) is mounted on the valve body (1), an inlet flow channel (7) and an outlet flow channel (8) are provided at both ends of the valve body (1), a flow port (9) is provided between the inlet flow channel (7) and the outlet flow channel (8), the valve seat (5) is mounted on the flow port (9), the valve sleeve (6) is sandwiched between the valve cover (2) and the valve seat (5), a plurality of throttling holes (10) are provided on the circumference of the valve sleeve (6), the valve cover (2) penetrates the valve cover (2) and extends into the interior of the valve body (1), the valve disc (4) is mounted on the inner end of the valve stem (3), and the outer periphery of the valve disc (4) is tightly fitted with the inner periphery of the valve sleeve (6); the characteristics are: The invention also comprises a filter screen (11), which is installed at one end of the valve seat (5) away from the valve disc (4) and is used for filtering the medium flowing through the valve seat (5). The filter screen (11) comprises a flow guide portion (12) arranged in the middle and having a hemispherical cross-section, a flow blocking portion (13) arranged on the periphery of the flow guide portion (12) and having an inverted U-shaped cross-section, and an annular connecting portion (14) arranged on the periphery of the flow blocking portion (13). The flow guide portion (12) is arranged to protrude toward the lower end, and the annular connecting portion (14) is detachably connected to the valve seat (5).

2. The throttling stop vent valve according to claim 1, characterized in that: A first thread groove (60) is provided at one end of the valve seat (5) away from the valve disc (4); a pressing ring (16) is threadedly connected to the first thread groove (15); the pressing ring (16) presses the annular connecting portion (14) against the inner end of the first thread groove (15); and a plurality of push plates (17) are provided at the bottom of the pressing ring (16).

3. The throttling stop vent valve according to claim 1, characterized in that: The valve body (1) further comprises an online sewage discharge device (18), the online sewage discharge device (18) comprising a sleeve (19), an opening and closing stopper sleeve (20), a driving assembly (21) and a sewage discharge assembly (22); the bottom of the valve body (1) is detachably connected to a bottom cover (23) via a fastener; the sleeve (19) is sandwiched between the valve seat (5) and the bottom cover (23); and a sealing gasket (24) is respectively arranged between the upper end of the sleeve (19) and the valve seat (5) and between the lower end of the sleeve (19) and the bottom cover (23); a sewage cavity (25) is formed in the sleeve (19); and the sleeve (25) is provided with a sealing gasket (24) between the upper end of the sleeve (19) and the valve seat (5) and between the lower end of the sleeve (19) and the bottom cover (23). A plurality of flow windows (26) are provided on the periphery of the sleeve (19), the opening and closing stop sleeve (20) is sleeved on the periphery of the sleeve (19), the driving assembly (21) is mounted on the bottom cover (23) and is used to drive the opening and closing stop sleeve (20) to slide up and down, so that it has a closed position that completely blocks the flow windows (26) and an open position that completely opens the flow windows (26), and the sewage discharge assembly (22) is used to connect the sewage chamber (25) with the outside of the valve when the valve disc (4) is in contact with the valve seat (5) and the opening and closing stop sleeve (20) is in the closed position, so that the sewage in the sewage chamber (25) is discharged to the outside.

4. The throttling stop vent valve according to claim 3, characterized in that: The driving assembly (21) comprises a driving rod (27) and a driving disk (28); a shaft hole (29) is provided through the middle of the bottom cover (23); the driving rod (27) passes through the shaft hole (29) and is rotatably matched with the shaft hole (29); a first sealing ring (30) is provided on the outer periphery of the driving rod (27) for forming a sealing match with the inner wall of the shaft hole (29); a limiting convex abutting against the inner side of the bottom cover (23) is provided at a position of the driving rod (27) corresponding to the upper end of the shaft hole (29); The drive rod (27) has a retaining ring (32) at a position corresponding to the lower end of the shaft hole (29) and is in contact with the lower outer side of the bottom cover (23). The drive rod (27) is provided with a threaded section (33). The drive disk (28) is provided with a screw hole (34) that matches the threaded section (33). The drive disk (28) is provided with a plurality of flow holes (35) that are vertically through-through. The outer periphery of the drive disk (28) is tightly fitted with the inner periphery of the sleeve (19), and the drive disk (28) is ) is provided with a plurality of guide protrusions (36) on its outer periphery, and a plurality of guide grooves (37) extending vertically are provided on its inner periphery, and the guide protrusions (36) are slidably arranged in the corresponding guide grooves (37); a plurality of first mounting grooves (38) are provided on the outer periphery of the driving disk (28), a driving magnet (39) is embedded in the first mounting groove (38), and the first mounting groove (38) is internally threadedly connected with a drive magnet (39) for limiting the driving magnet (39) in the corresponding first mounting groove (38) A first hexagonal screw plug (40) is inserted into the opening and closing stopper sleeve (20), a plurality of second mounting grooves (41) corresponding to the first mounting grooves (38) are arranged on the inner periphery of the opening and closing stopper sleeve (20), a follower magnet (42) is embedded in the second mounting groove (41), the follower magnet (42) and the corresponding driving magnet (39) attract each other, and second sealing rings (43) for forming a sealing fit with the outer periphery of the sleeve (19) are respectively installed at positions above and below the inner periphery of the opening and closing stopper sleeve (20) corresponding to the follower magnet (42).

5. The throttling stop vent valve according to claim 4, characterized in that: A first nut (44) for limiting the lower travel of the driving disk (28) is threadedly connected to the threaded section (33) of the driving rod (27) at a position corresponding to the lower side of the driving disk (28), and a gasket (45) is arranged between the lower end of the first nut (44) and the limiting flange (31); a second nut (46) for limiting the upper travel of the driving disk (28) is threadedly connected to the threaded section (33) of the driving rod (27) at a position corresponding to the upper side of the driving disk (28), and a locking nut (47) is threadedly connected to the threaded section (33) at a position corresponding to the upper end of the second nut (46), and the locking nut (47) is tightly abutted against the second nut (46).

6. The throttling stop vent valve according to claim 4, characterized in that: The sewage discharge assembly (22) comprises an operating cap (48), an extension section (49) is arranged at the lower end of the driving rod (27), and limiting cut surfaces (50) are arranged on both sides of the extension section (49), the operating cap (48) is sleeved on the extension section (49), the operating cap (48) and the extension section (49) form a circumferential linkage, and the operating cap (48) can move vertically along the extension section (49), and the limiting cut surface (50) is provided with a plurality of first and second second stoppers from top to bottom. A hemispherical positioning groove (51) and a second hemispherical positioning groove (52), the inner wall of the operating cap (48) is provided with a hemispherical positioning protrusion (53) for matching with the first hemispherical positioning groove (51) or the second hemispherical positioning groove (52); the extension section (49) is provided with a guide hole (54) extending upward along the axial direction, and the outer periphery of the limiting flange (31) is provided with a plurality of drainage holes (55) extending radially and communicating with the peripheral side of the guide hole (54), The inner end of the operating cap (48) is integrally provided with a guide rod (56) extending into the guide hole (54); the guide rod (56) is axially penetrated with a drainage channel (57) for connecting the guide hole (54) with the outside, and the lower end of the drainage channel (57) is threadedly connected with a second hexagonal screw plug (58); the outer periphery of the guide rod (56) is provided with two third sealing rings (59) for forming a sealing match with the inner wall of the guide hole (54); and when the hemispherical fixed When the positioning protrusion (53) is matched with the first hemispherical positioning groove (51), the inner end of the drainage hole (55) is arranged between the two third sealing rings (59), and the guide rod (56) blocks the drainage hole (55) and the upper end of the guide hole (54). When the hemispherical positioning protrusion (53) is matched with the second hemispherical positioning groove (52), the inner end of the drainage hole (55) is located above the two third sealing rings (59), and the drainage hole (55) is connected with the upper end of the guide hole (54).

7. The throttling stop vent valve according to claim 6, characterized in that: The outer periphery of the operating cap (48) is provided with a plurality of thread grooves (60), and an operating rod (61) is threadedly connected to the thread groove (60).

8. The throttling stop vent valve according to claim 3, characterized in that: The upper end of the bottom cover (23) is provided with a first positioning boss (62), the lower end of the valve seat (5) is provided with a second positioning boss (63) coaxial with the first positioning boss (62), and the two ends of the sleeve (19) are respectively sleeved on the outer circumference of the first positioning boss (62) and the second positioning boss (63).

9. The throttling stop vent valve according to claim 1, characterized in that: A connecting cavity (64) is provided at the upper end of the valve flap (4), the lower end of the valve stem (3) extends into the connecting cavity (64), and a double open ring (65) is clamped on the outer periphery of the valve stem (3) located inside the connecting cavity (64). A pressure cap (66) is also threadedly connected to the connecting cavity (64), and the pressure cap (66) abuts against the upper end of the double open ring (65), so that the lower end of the valve stem (3) is restricted in the connecting cavity (64). A pressure stabilizing hole (67) connected to the connecting cavity (64) is also provided at the lower end of the valve flap (4).

10. The throttling stop vent valve according to claim 1, characterized in that: The bottom of the valve disc (4) is also connected to a pressure seat (68) via a fastener, and an annular sealing ring (69) with an inverted L-shaped cross section is sandwiched between the pressure seat (68) and the valve disc (4). The lower end of the annular sealing ring (69) is provided with an annular sealing groove (70) with an inverted cone-shaped cross section, and the upper end of the valve seat (5) is provided with an annular sealing protrusion (71) that matches the annular sealing groove (70).

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