CN116123305A - Nine-eccentric hard sealing ball valve - Google Patents
Nine-eccentric hard sealing ball valve Download PDFInfo
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- CN116123305A CN116123305A CN202310193613.0A CN202310193613A CN116123305A CN 116123305 A CN116123305 A CN 116123305A CN 202310193613 A CN202310193613 A CN 202310193613A CN 116123305 A CN116123305 A CN 116123305A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0407—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0457—Packings
- F16K5/0471—Packings between housing and plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/18—Special arrangements for separating the sealing faces or for pressing them together for plugs with cylindrical surfaces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The utility model provides a nine eccentric hard seal ball valves, including valve body and case, all be equipped with offset distance between valve body inlet end runner central line and the outlet end runner central line and the valve body case lateral center line, the inlet end of valve body is laid with the outlet end staggering, the spherical center of the spherical sealing face of the first, second sealing ring of case also is provided with the skew with valve body rotation center F, this skew and above-mentioned offset distance assorted for spherical sealing face and circular cone sealing face can realize sealing when the case rotates to the ball valve closed condition, and when making the case rotate, the spherical sealing face of sealing ring can separate in the twinkling of an eye or be closed with the circular cone sealing face of valve body, can reduce wearing and tearing by a wide margin, increase of service life.
Description
Technical Field
The invention belongs to the technical field of hard seal ball valves, and particularly relates to a nine-eccentric hard seal ball valve.
Background
When the existing ball valve (excluding the half ball valve) is opened and closed, the valve core (ball body) rotates 90 degrees, and the valve core sealing surface and the valve body sealing surface are tightly attached all the time, so that the friction stroke between the sealing surfaces is 90 degrees. In the process, abrasion exists between sealing surfaces all the time, so the service life of the metal hard sealing pair is generally shorter, a three-eccentric ball valve and a four-eccentric ball valve are arranged in the prior art, but the three-eccentric ball valve only has one sealing pair, namely one-way sealing; the spring is arranged between the ball body and the valve seat of the four-eccentric ball valve, the valve seat can axially move, the excessive extrusion of the sealing surface can be prevented, but the ball body and the valve seat can not be rapidly separated, and the friction stroke is relatively long; in addition, springs are prone to failure by solid particulate matter in the media.
Disclosure of Invention
In order to achieve the purpose, the invention firstly provides the nine-eccentric hard seal ball valve with the friction stroke of only 1-2 degrees, further reduces abrasion between sealing surfaces and prolongs the service life of the sealing surfaces.
The invention relates to a nine-eccentric hard sealing ball valve, which comprises a valve body and a valve core, wherein the valve core is arranged in the valve body, the valve core rotates 90 degrees counterclockwise to open the ball valve, and rotates 90 degrees clockwise to close the ball valve; the vertical center line of the valve body valve core, the horizontal center line of the valve body valve core and the horizontal center line of the valve body valve core are arranged to form a coordinate axis of a space rectangular coordinate system, the valve body is provided with an inlet end and an outlet end, a valve core flow channel is arranged in the middle of the valve core, the inlet end of the valve body is communicated with the outlet end of the valve body through the valve core flow channel when the ball valve is in an open state, the axial center lines of the inlet end of the valve body and the outlet end of the valve body are respectively an inlet end flow channel center line and an outlet end flow channel center line, a connecting line PN of center points of two ends of the valve core flow channel is taken as the valve core flow channel center line,
the origin of the space rectangular coordinate system is the rotation center F of the valve core, the vertical center line of the valve core of the valve body is a rotation shaft of the valve core, a first sealing ring and a second sealing ring are symmetrically fixed on the outer side surface of the valve core on two sides of the center line of the flow channel of the valve core by taking the rotation center F of the valve core as the center, spherical sealing surfaces are arranged on the outer side surfaces of the first sealing ring and the second sealing ring, conical sealing surfaces corresponding to the spherical sealing surfaces are arranged on the inlet end of the valve body and the outlet end of the valve body, the spherical sealing surfaces and the conical sealing surfaces form a spherical-conical sealing pair in the closed state of the ball valve, the spherical sealing surface center of the first sealing ring is C, and the spherical sealing surface center of the second sealing ring is A;
the valve body valve core transverse center line, the valve core flow channel center line, the inlet end flow channel center line and the outlet end flow channel center line are all on the same plane, the planes are set to be rotation planes, and the spherical center C and the spherical center A are offset relative to the rotation center F of the valve core along the longitudinal direction and the transverse direction on the rotation planes;
the inlet end flow channel center line and the outlet end flow channel center line are arranged on two sides of the valve body valve core transverse center line and are parallel to the valve body valve core transverse center line, an offset distance E5 is arranged between the inlet end flow channel center line and the valve body valve core transverse center line, and an offset distance E6 is arranged between the outlet end flow channel center line and the valve body valve core transverse center line;
when the ball valve is in a closed state, an included angle beta is formed between the central line of the valve core flow channel and the transverse central line of the valve core of the valve body; the center of the valve body inlet end facing the valve core end face is L, the center of the valve body outlet end facing the valve core end face is M, the connecting line of the LM is a valve body flow passage center line, and an included angle alpha is formed between the valve body flow passage center line and the valve body valve core transverse center line.
By adopting the structure, firstly, the spherical sealing surface on the first sealing ring and the second sealing ring and the conical sealing surface of the valve body form a spherical-conical surface sealing pair to realize the sealing of the ball valve, and the sealing is linear sealing, so that the abrasion of the sealing surfaces during the opening and closing of the ball valve is reduced, then, as the offset distances are arranged between the inlet end flow passage center line and the outlet end flow passage center line and the transverse center line of the valve body valve core, the inlet end and the outlet end of the valve body are distributed in a staggered manner, the spherical center C of the spherical sealing surface of the first sealing ring and the spherical center A of the spherical sealing surface of the second sealing ring are also offset from the rotating center F of the valve body, and the offset distance is matched with the offset distance, so that the sealing can be realized when the spherical sealing surface and the conical sealing surface rotate to the closed state of the ball valve, and simultaneously, the flow passage center line of the valve core and the rotating center of the valve core are also provided with a deflection angle, so that the valve core flow passage is just arranged between the inlet end and the outlet end in the opened state, under the mutual cooperation of the structure, the integrity of the main body function of the ball valve is ensured, and on the other hand, when the valve core rotates eccentrically, the spherical sealing surface and the spherical sealing surface of the valve body and the valve body can be separated from the rotating surface or the sealing surface of the valve body by a large margin of 1, the friction stroke can be greatly reduced, and the sealing surface can only be greatly, and the abrasion is greatly reduced, and the sealing surface.
In this embodiment, the end faces of the spool along the flow path direction of the spool are spherical arcs, the spherical center of the end face of the inlet end of the spool is B, the spherical center of the end face of the outlet end of the spool is D, the spherical sealing face of the first sealing ring is SR4, the spherical sealing face of the second sealing ring is SR3, the spherical sealing face of the second sealing ring is SR1, the vertical center line of the spool of the valve body, the horizontal center line of the spool of the valve body and the longitudinal center line of the spool of the valve body are respectively Z-axis, X-axis and Y-axis of a space rectangular coordinate system, the coordinates of F are (0, 0), the spherical sealing face spherical center C of the first sealing ring is (-E3, -E4, 0), the spherical sealing face spherical center a of the second sealing ring is (E2, E1, 0), the spherical center of the end face of the inlet end of the spool is (-E3, E1, 0), the spherical center D of the end face of the spool outlet end is (E2, -E4, 0), and the coordinates of the spherical center of the spool is (E1=e2=e4=e5=e6=1-5 mm. By setting the parameters, the manufacturing process is simplified, and the whole device is convenient to process and assemble.
In this embodiment, sr1=sr3, sr2=sr4, and sr2.ltoreq.sr1-2E 1. By setting the parameter, the valve core is ensured not to interfere with the valve body when the valve core rotates.
In this embodiment, α=β=arctane1/(SR 1-E1), and PN coincides with LM when the ball valve is in the open state, that is: alpha=beta, at this moment, the central line of the valve core flow channel coincides with the central line of the valve body flow channel, so that the resistance is minimum when the fluid enters the valve core flow channel from the inlet end of the valve body and flows out from the outlet end of the valve body.
In this embodiment, the vertex of the conical sealing surface at the inlet end of the valve body is G, the vertex of the conical sealing surface at the outlet end of the valve body is H, the G point is disposed on the center line of the flow path at the inlet end, the offset distance from the G point to the longitudinal center line of the valve core of the valve body is E7, the H point is disposed on the center line of the flow path at the outlet end, and the offset distance from the H point to the longitudinal center line of the valve core of the valve body is E8, and e7=e8. By setting the parameters, the manufacturing process is simplified, and the whole device is convenient to process and assemble. The above 8 eccentricities E1, E2, E3, E4, E5, E6, E7, E8 and an eccentric angle β are collectively referred to as nine eccentricities.
In this embodiment, two outer side surfaces of the valve core are respectively provided with a first mounting column and a second mounting column, the outer end surfaces of the first mounting column and the second mounting column are mutually parallel connection surfaces, the connection surfaces are parallel to the vertical central line of the valve core of the valve body, one side of each of the first sealing ring and the second sealing ring is a spherical sealing surface, the other side of each of the first sealing ring and the second sealing ring is provided with a slot matched with the first mounting column and the second mounting column respectively, the first sealing ring and the second sealing ring are respectively arranged on the first mounting column and the second mounting column through the slots, a plurality of screw holes perpendicular to the connection surfaces are symmetrically arranged on the connection surfaces of the first mounting column and the second mounting column by taking the middle point of the connection surfaces as the center, countersunk through holes matched with the screw holes are arranged on the first sealing ring and the second sealing ring, and tension screws are arranged in the countersunk through holes of the first sealing ring and the second sealing ring; the first sealing ring and the second sealing ring are also provided with threaded through holes between adjacent countersunk through holes, a plurality of threaded through holes are arranged in a central symmetry manner, and thrust screws are connected in the threaded through holes in a threaded manner; the first sealing ring and the second sealing ring are respectively fixed on the first mounting column and the second mounting column through lag screws; when the valve is in a closed state, the distance between the first sealing ring and the second sealing ring and the conical sealing surface of the valve body is adjusted through the lag screw and the thrust screw.
Through the structure, the distance between the first sealing ring and the second sealing ring and the conical sealing surface of the valve body can be adjusted, so that the problem that the sealing effect of a workpiece is poor due to machining precision is solved, the spherical sealing surface and the conical sealing surface are guaranteed to be free of gaps, in addition, the sealing tight fit is achieved, during specific adjustment, the tension screws are firstly unscrewed, the same number of turns of all the tension screws are unscrewed, then the thrust screws are screwed, the connecting surface is tightly propped by the thrust screws, the first sealing ring and the second sealing ring are driven to be in tight contact with the conical sealing surface of the valve body, the adjustment of the positions of the spherical sealing surfaces on the first sealing ring and the second sealing ring is achieved, and finally the tension screws are screwed again, and the first sealing ring and the second sealing ring are fixed.
In the embodiment, the spherical sealing surface of the valve core and the conical sealing surface of the valve body are made of stainless wear-resistant alloy materials with different hardness. The friction surface adopts two metal friction surfaces with different hardness, so that when two metals with the same hardness are rubbed with each other, the friction surface is easy to generate rapid abrasion and adhesion, commonly called as occlusion phenomenon, and movement failure is prevented.
In this embodiment, the valve body includes well valve body, exit end valve body and entrance point valve body, and well valve body is cylindric, exit end valve body and entrance point valve body are fixed in the both ends of well valve body and are formed the entrance point and the exit end of valve body, and the inner chamber at well valve body is installed to the case, and well valve body upper and lower both ends movable mounting has upper valve rod and lower valve rod respectively, and the center pin of upper valve rod and lower valve rod coincides with the vertical central line of valve body case, the case passes through upper valve rod and lower valve rod to be supported in well valve body, and the case passes through upper valve rod and drives the rotation.
In this embodiment, the outlet valve body and the inlet valve body are flange-type end valve bodies or welded-type end valve bodies.
Compared with the prior art, the invention has the following remarkable advantages:
1. because the center of the spherical sealing surface of the valve core is bidirectionally deviated from the rotation center of the valve core, when the valve core rotates, the spherical sealing surface and the conical sealing surface of the valve body can be instantaneously separated or closed, the friction stroke is only 1-2 degrees, the abrasion between the sealing surfaces can be greatly reduced, and the service life of the sealing surfaces is prolonged.
2. The sealing ring is fixed on the eccentric cylindrical surface of the valve core through the thrust screw and the lag screw, and the position of the sealing ring on the valve core can be finely adjusted along the transverse central line of the valve core of the valve body through adjusting the thrust screw and the lag screw, so that processing and assembling errors are eliminated, and the spherical sealing surface of the valve core is tightly contacted with the conical sealing surface of the valve body.
In summary, when the valve is opened and closed, the valve core sealing surface and the valve body sealing surface can be separated or closed instantaneously, the friction stroke is only 1-2 degrees, the abrasion between the sealing surfaces can be greatly reduced, and the service life of the sealing surfaces is prolonged.
Drawings
FIG. 1 is a front elevational cross-sectional view of the ball valve of the present invention in its closed condition;
FIG. 2 is a front elevational cross-sectional view of the ball valve of the present invention in an open condition;
FIG. 3 is a horizontal cross-sectional view of the ball valve of the present invention in the closed position;
FIG. 4 is a horizontal cross-sectional view of the ball valve of the present invention in an open state;
FIG. 5 is a horizontal cross-sectional view of the half-open state of the ball valve of the present invention;
FIG. 6 is a diagram showing the distribution of lag and lag screws on first and second seal rings of the present invention.
In the figure: 1. the vertical center line of the valve core of the valve body; 2. an upper valve rod; 3. a middle valve body; 4. a valve body bolt; 5. a valve body sealing ring; 6. an outlet end valve body; 7. a valve core flow passage; 8. a second mounting post; 9. a lag screw; 10. a second seal ring; 11. a thrust screw; 12. installing a column sealing ring; 13. a spherical sealing surface; 14. a conical sealing surface; 15. a lower valve rod; 16. a lower valve rod sealing ring; 17. a lower shaft hole; 18. a lower bearing; 19. a first mounting post; 20. a valve body spool transverse center line; 21. a first seal ring; 22. an inlet end valve body; 23. a valve core; 24. an upper shaft hole; 25. an upper bearing; 26. an upper valve stem seal ring; 27. the longitudinal center line of the valve body valve core; 28. the center line of the valve body flow passage; 29. the central line of the valve core flow channel; 30. an inlet end flowpath centerline; 31. the outlet end flowpath centerline.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
As shown in fig. 1 to 6, the invention provides a nine-eccentric hard sealing ball valve, which comprises a valve body and a valve core 23, wherein the valve core 23 is arranged in the valve body, the valve core 23 rotates 90 degrees anticlockwise to realize the opening of the valve, the valve is turned 90 degrees clockwise to close the valve, the vertical central line 1 of the valve core of the valve body, the horizontal central line 20 of the valve core and the longitudinal central line 27 of the valve core are respectively Z, X, Y coordinate axes of a space rectangular coordinate system, when the valve core is assembled, the vertical central line of the valve core and the vertical central line of the valve body are mutually overlapped to form the vertical central line 1 of the valve core of the valve body, the horizontal central line of the valve core and the horizontal central line of the valve body are mutually overlapped to form the horizontal central line 20 of the valve core of the valve body, and the longitudinal central line of the valve core of the valve body are mutually overlapped to form the longitudinal central line 27 of the valve core of the valve body;
the valve body comprises a middle valve body 3, an outlet end valve body 6 and an inlet end valve body 22, wherein the middle valve body 3 is cylindrical, the outlet end valve body 6 and the inlet end valve body 22 are fixedly arranged at two ends of the middle valve body 3 to form an inlet end and an outlet end of the valve body, the outlet end valve body 6 and the inlet end valve body 22 are flange-type end valve bodies or welding-type end valve bodies, the flange-type end valve bodies are connected with the middle valve body 3 into a whole through valve body bolts 4, and a valve body sealing ring 5 is arranged between the middle valve body 3 and the flange-type end valve bodies for sealing; the welding type end valve body and the middle valve body 3 are welded into a whole, and the flange type end valve body or the welding type end valve body is provided with an assembling spigot so as to ensure concentricity with the middle valve body;
the valve core 23 is arranged in the inner cavity of the middle valve body 3, an upper shaft hole 24 and a lower shaft hole 17 are respectively arranged at the upper end and the lower end of the middle valve body 3, the upper valve rod 2 is arranged in the upper shaft hole 24 through an upper bearing 25, an upper valve rod sealing ring 26 is arranged on the inner wall of the upper shaft hole 24 to realize the sealing connection between the inner wall of the upper shaft hole 24 and the outer wall of the upper valve rod 2, one end of the upper valve rod 2 is fixedly connected with the valve core 23, the other end of the upper valve rod 2 is arranged outside the valve body and is used for being connected with a driving part for driving the upper valve rod 2 to rotate, a lower valve rod 15 is coaxially arranged in the lower shaft hole 17, the bottom of the lower valve rod 15 is fixed on the middle valve body 3 through a bolt, the outer wall of the lower valve rod 15 is in sealing connection with the inner wall of the lower shaft hole 17 through a lower valve rod sealing ring 16, a lower bearing 18 is arranged at the bottom of the valve core 23, and the upper end of the lower valve rod 15 is inserted into an inner hole of the lower bearing 18; the central axes of the upper valve rod 2 and the lower valve rod 15 coincide with the vertical central line 1 of the valve body valve core, the valve core 23 is supported in the middle valve body 3 through the upper valve rod 2 and the lower valve rod 15, and the valve core 23 is driven to rotate through the upper valve rod 2.
The outer side surface of the valve core 23 is fixedly provided with a first sealing ring 21 and a second sealing ring 10 on two sides of a valve core flow passage central line 29, the outer side surfaces of the first sealing ring 21 and the second sealing ring 10 are provided with spherical sealing surfaces 13, the inlet end and the outlet end of the valve body are respectively provided with a conical sealing surface 14 corresponding to the spherical sealing surfaces 13, and in the closed state of the ball valve, the spherical sealing surfaces 13 and the conical sealing surfaces 14 of the valve body form a spherical-conical sealing pair so as to realize the sealing connection between the first sealing ring 21 and the inlet end of the valve body and between the second sealing ring 10 and the outlet end of the valve body;
the two outer side surfaces of the valve core 23 are respectively provided with a first mounting column 19 and a second mounting column 8, in the embodiment, the first mounting column 19 and the second mounting column 8 are integrally formed with the valve core 23, the outer end surfaces of the first mounting column 19 and the second mounting column 8 are mutually parallel connection surfaces, the connection surfaces are parallel to the vertical central line 1 of the valve core of the valve body, one side of each of the first sealing ring and the second sealing ring is a spherical sealing surface, the other side of each of the first sealing ring and the second sealing ring is respectively provided with a slot matched with the first mounting column 19 and the second mounting column 8, the first sealing ring 21 and the second sealing ring 10 are respectively arranged on the first mounting column 19 and the second mounting column 8 through the slots, and the inner wall of the first sealing ring 21 is in sliding sealing connection with the outer wall of the first mounting column 19, and the inner wall of the second sealing ring 10 is in sliding sealing connection with the outer wall of the second mounting column 8 through a mounting column sealing ring 12;
a plurality of screw holes perpendicular to the connecting surface are symmetrically arranged on the connecting surface of the first mounting column 19 and the second mounting column 8 by taking the middle point of the connecting surface as the center, countersunk through holes matched with the screw holes are arranged on the first sealing ring and the second sealing ring, and a lag screw 9 is arranged in the countersunk through holes of the first sealing ring and the second sealing ring; the first sealing ring and the second sealing ring are also provided with threaded through holes between adjacent countersunk through holes, a plurality of threaded through holes are arranged in a central symmetry manner, and thrust screws 11 are connected in the threaded through holes in a threaded manner;
the first sealing ring 21 and the second sealing ring 10 are respectively fixed on the first mounting column 19 and the second mounting column 8 through the lag screws 9, and the purpose of the thrust screws 11 is to push against the connecting surface, so that the first sealing ring and the second sealing ring are close to or far away from the connecting surface, the adjustment of the distance between the spherical sealing surface 13 on the first sealing ring 21 and the second sealing ring 10 and the conical sealing surface 14 of the valve body is realized, the spherical sealing surface 13 is tightly connected with the conical sealing surface 14, and the sealing effect is improved; the pushing screws 11 and the lag screws 9 are uniformly distributed at intervals and are symmetrically distributed at the center of the connecting surface, and the number and the size of the pushing screws and the lag screws are determined according to the size of the sealing ring; in this embodiment, four thrust screws 11 and four lag screws 9 are all arranged, and the specific adjustment mode is as follows:
during adjustment, firstly unscrewing the lag screws 9, unscrewing all the lag screws 9 for the same number of turns, then screwing the thrust screws 11, and tightly propping up the connecting surface through the thrust screws 11, so that the positions of the spherical sealing surfaces 13 on the first sealing ring 21 and the second sealing ring 10 are adjusted, the gap between the spherical sealing surfaces 13 and the conical sealing surfaces 14 is ensured, and the spherical sealing surfaces are in tight sealing fit, thereby solving the problem of poor sealing effect of a workpiece caused by machining precision;
the spherical sealing surface 13 of the valve core 23 and the conical sealing surface 14 of the valve body are made of stainless wear-resistant alloy materials with different hardness, so that the phenomenon that the friction surface is easily worn and adhered quickly and commonly called as 'occlusion' when two metals with the same hardness are rubbed with each other can be effectively avoided, and the movement failure is prevented.
The specific parameters of the ball valve are set as follows:
the origin F of a space rectangular coordinate system formed by a valve body valve core vertical center line 1, a valve body valve core transverse center line 20 and a valve body valve core longitudinal center line 27 is set as the rotation center of the valve core 23, the valve body valve core vertical center line 1 is a rotation shaft of the valve core 23, and the valve body valve core transverse center line 20, the valve body valve core longitudinal center line 27, the valve core flow passage center line 29, the inlet end flow passage center line 30 and the outlet end flow passage center line 31 are all on the same plane;
assuming that the coordinates of F are (0, 0), the spherical center of the spherical sealing surface 13 of the first seal ring 21 is C, the radius is SR3, the coordinates of C are (-E3, -E4, 0), the spherical center of the spherical sealing surface 13 of the second seal ring 10 is A, the radius is SR1, the coordinates of A are (E2, E1, 0),
the end faces of the two ends of the valve core along the direction of the valve core flow channel 7 are spherical arcs, the spherical center of the end face of the valve core inlet end is B, the radius is SR2, the coordinates of B are (-E3, E1, 0), the spherical center of the end face of the valve core outlet end is D, the radius is SR4, and the coordinates of D are (E2, -E4, 0);
the inlet end flow path center line 30 and the outlet end flow path center line 31 are disposed on both sides of the valve body spool lateral center line 20 and are parallel to the valve body spool lateral center line 20, the offset distance between the inlet end flow path center line 30 and the valve body spool lateral center line 20 is E5, the offset distance between the outlet end flow path center line 31 and the valve body spool lateral center line 20 is E6, and in this embodiment, for convenience of manufacture and processing, e1=e2=e3=e4=e5=e6=1 to 5mm, sr1=sr3, sr2=sr4 are set.
The connecting line LM from the center L of the inlet end to the center M of the outlet end of the valve body is a valve body flow channel center line 28, and when the ball valve is in an open state, an included angle alpha is formed between the valve body flow channel center line 28 and the transverse center line 20 of the valve body valve core;
the connecting line PN from the center P of the inlet end of the valve core flow channel 7 of the valve core 23 to the center N of the outlet end of the valve core flow channel 7 is a valve core flow channel center line 29, and when the ball valve is in a closed state, an included angle beta is formed between the valve core flow channel center line 29 and a valve core longitudinal center line 27 of the valve body;
in this embodiment, α=β=arctane1/(SR 1-E1), so that when the ball valve is in the open state, the flow channel center line 29 of the valve core 23 coincides with the flow channel center line 28 of the valve body, and the valve core flow channel is just disposed between the inlet end and the outlet end, under the mutual cooperation of the above structures, on the one hand, the integrity of the main body function of the ball valve is ensured, on the other hand, when the valve core rotates due to the eccentricity, the spherical sealing surface 13 of the sealing ring and the conical sealing surface 14 of the valve body can be instantaneously separated or closed, the friction stroke is only 1-2 °, the abrasion between the sealing surfaces can be greatly reduced, and the service life of the sealing surfaces is greatly prolonged.
The vertex of the conical sealing surface at the inlet end of the valve body is G, the vertex of the conical sealing surface at the outlet end of the valve body is H, the point G is disposed on the center line 30 of the flow channel at the inlet end, the offset distance from the point G to the longitudinal center line 27 of the valve core of the valve body is E7, the point H is disposed on the center line 31 of the flow channel at the outlet end, and the offset distance from the point H to the longitudinal center line 27 of the valve core of the valve body is E8, in this embodiment, e7=e8.
From the above description, it can be seen that the present device has a total of 8 eccentricities E1, E2, E3, E4, E5, E6, E7, E8 and one eccentric angle β, and thus the present application collectively refers to nine eccentricities.
The working process of the device is as follows:
as shown in fig. 3, 4 and 5, the ball valve is from a closed state to an open state;
the upper valve rod 2 drives the valve core 23 to rotate by 90 degrees anticlockwise, the half-open state shown in fig. 5 is reached at first, at this moment, the inlet end and the outlet end of the valve body are conducted, a certain flow rate is generated, along with the further rotation of the valve core 23, the valve core flow channel of the valve core 23 rotates to a position between the inlet end and the outlet end of the valve body, and when the valve core flow channel central line PN is overlapped with the valve body flow channel central line LM, the upper valve rod 2 reaches a limit point, so that the opening of the valve is completed, and when the valve is closed, the ball valve can be completely closed by rotating the upper valve rod 90 degrees clockwise.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather utilizing equivalent structural changes made in the present invention description and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. The nine-eccentric hard sealing ball valve comprises a valve body and a valve core (23), wherein the valve core (23) is arranged in the valve body, the valve core (23) rotates 90-degree ball valve in the anticlockwise direction to be opened, and rotates 90-degree ball valve in the clockwise direction to be closed; establish vertical central line (1) of valve body case, valve body case lateral centerline (20) and valve body case lateral centerline (27) constitute the coordinate axis of space rectangular coordinate system, the valve body is provided with entrance point and exit end, case (23) middle part is equipped with case runner (7), when the ball valve was opened, the valve body entrance point passes through case runner (7) and valve body exit end intercommunication, establishes the axial central line of valve body entrance point and valve body exit end and is entrance point runner central line (30) and exit end runner central line (31) respectively, establishes the both ends central point line PN of case runner (7) and is case runner central line (29), its characterized in that:
the origin of the space rectangular coordinate system is the rotation center F of a valve core (23), the vertical center line (1) of the valve core of the valve body is a rotation shaft of the valve core (23), a first sealing ring (21) and a second sealing ring (10) are symmetrically fixed on the outer side surface of the valve core (23) and on the two sides of the center line (29) of a valve core flow channel by taking the rotation center F of the valve core (23) as the center, spherical sealing surfaces (13) are arranged on the outer side surfaces of the first sealing ring (21) and the second sealing ring (10), conical sealing surfaces (14) corresponding to the spherical sealing surfaces (13) are arranged on the inlet end and the outlet end of the valve body, the spherical sealing surfaces (13) and the conical sealing surfaces (14) form a spherical-conical sealing pair, the spherical sealing surfaces of the first sealing ring (21) are C, and the spherical sealing surfaces of the second sealing ring (10) are A;
the valve body valve core transverse center line (20), the valve body valve core transverse center line (27), the valve core flow channel center line (29), the inlet end flow channel center line (30) and the outlet end flow channel center line (31) are all on the same plane, the planes are set to be rotation planes, and the sphere center C and the sphere center A are offset relative to the rotation center F of the valve core (23) along the longitudinal direction and the transverse direction on the rotation planes;
the inlet end flow passage center line (30) and the outlet end flow passage center line (31) are arranged on two sides of the valve body valve core transverse center line (20) and are parallel to the valve body valve core transverse center line (20), the inlet end flow passage center line (30) and the valve body valve core transverse center line (20) are provided with offset distances E5, and offset distances E6 are arranged between the outlet end flow passage center line (31) and the valve body valve core transverse center line (20);
when the ball valve is in a closed state, an included angle beta is formed between the central line (29) of the valve core flow channel and the transverse central line (27) of the valve core of the valve body; the center of the valve body inlet end facing the valve core end face is L, the center of the valve body outlet end facing the valve core end face is M, the connecting line of the LM is a valve body flow passage center line (28), and an included angle alpha is formed between the valve body flow passage center line (28) and the valve body valve core transverse center line (20).
2. The nine-eccentric hard seal ball valve as in claim 1, wherein: the end faces of the two ends of the valve core (23) along the valve core flow channel direction are spherical arcs, the end face sphere center of the inlet end of the valve core (23) is B, the end face sphere center of the outlet end of the valve core (23) is D,
setting a vertical center line (1) of a valve body valve core, a transverse center line (20) of the valve body valve core and a transverse center line (27) of the valve body valve core as a Z axis, an X axis and a Y axis of a space rectangular coordinate system respectively, setting the coordinates of F as (0, 0), when the ball valve is in a closed state, the coordinates of a spherical center C of a spherical sealing surface of a first sealing ring (21) are (-E3, -E4, 0), the coordinates of a spherical center A of a spherical sealing surface of a second sealing ring (10) are (E2, E1, 0), the coordinates of a spherical center B of an end face of an inlet end of the valve core are (-E3, E1, 0), the coordinates of a spherical center D of an end face of an outlet end of the valve core are (E2, -E4, 0), and E1 = E2 = E3 = E5 = E6 = 1-5 mm.
3. The nine-eccentric hard seal ball valve as in claim 2, wherein: the radius of the end face sphere center of the inlet end of the valve core (23) is SR2, the radius of the end face sphere center of the outlet end of the valve core (23) is SR4, the radius of the spherical sealing surface of the first sealing ring (21) is SR3, the radius of the spherical sealing surface of the second sealing ring (10) is SR1, SR1 = SR3, SR2 = SR4, and SR2 is less than or equal to (SR 1-2E 1).
4. A nine-eccentric hard-sealed ball valve as in claim 3, wherein: α=β.
5. The nine-eccentric hard seal ball valve as in claim 4, wherein: the vertex of the conical sealing surface at the inlet end of the valve body is G, the vertex of the conical sealing surface at the outlet end of the valve body is H, the G point is arranged on the center line (30) of the flow channel at the inlet end, and the H point is arranged on the center line (31) of the flow channel at the outlet end.
6. The nine-eccentric hard seal ball valve as in claim 5, wherein: the offset distance from the G point to the valve body valve core transverse center line (27) is E7, the offset distance from the H point to the valve body valve core transverse center line (27) is E8, and E7=E8.
7. The nine-eccentric hard seal ball valve as in any one of claims 1-6, wherein: the two outer side surfaces of the valve core are respectively provided with a first mounting column (19) and a second mounting column (8), the outer end surfaces of the first mounting column (19) and the second mounting column (8) are mutually parallel connection surfaces, the connection surfaces are parallel to the vertical central line (1) of the valve core of the valve body, one sides of the first sealing ring and the second sealing ring are spherical sealing surfaces, the other sides of the first sealing ring and the second sealing ring are respectively provided with slots matched with the first mounting column (19) and the second mounting column (8), the first sealing ring (21) and the second sealing ring (10) are respectively arranged on the first mounting column (19) and the second mounting column (8) through the slots, a plurality of screw holes perpendicular to the connection surfaces are symmetrically arranged by taking the middle points of the connection surfaces as the centers, countersunk through holes matched with the screw holes are arranged on the first sealing ring and the second sealing ring, and a tension screw (9) is arranged in the countersunk through holes of the first sealing ring and the second sealing ring; the first sealing ring and the second sealing ring are also provided with threaded through holes between adjacent countersunk through holes, a plurality of threaded through holes are arranged in a central symmetry manner, and thrust screws (11) are connected in the threaded through holes in a threaded manner;
the first sealing ring (21) and the second sealing ring (10) are respectively fixed on the first mounting column (19) and the second mounting column (8) through the lag screw (9), and the distance between the first sealing ring and the conical sealing surface of the valve body is adjusted through the lag screw (9) and the thrust screw (11).
8. The nine-eccentric hard-sealed ball valve of claim 7, wherein: the spherical sealing surface (13) of the valve core (23) and the conical sealing surface (14) of the valve body are made of stainless wear-resistant alloy materials with different hardness.
9. The nine-eccentric hard-sealed ball valve of claim 7, wherein: the valve body comprises a middle valve body (3), an outlet end valve body (6) and an inlet end valve body (22), wherein the middle valve body (3) is cylindrical, the outlet end valve body (6) and the inlet end valve body (22) are fixed at two ends of the middle valve body (3) to form an inlet end and an outlet end of the valve body, a valve core (23) is arranged in an inner cavity of the middle valve body (3), an upper valve rod (2) and a lower valve rod (15) are respectively arranged at the upper end and the lower end of the middle valve body (3), a central shaft of the upper valve rod (2) and a central shaft of the lower valve rod (15) are overlapped with a valve core vertical central line (1) of the valve body, the valve core (23) is supported in the middle valve body (3) through the upper valve rod (2) and the lower valve rod (15), and the valve core (23) is driven to rotate through the upper valve rod (2).
10. The nine-eccentric hard-sealed ball valve of claim 9, wherein: the outlet end valve body (6) and the inlet end valve body (22) are flange-type end valve bodies or welding-type end valve bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310193613.0A CN116123305A (en) | 2023-03-03 | 2023-03-03 | Nine-eccentric hard sealing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310193613.0A CN116123305A (en) | 2023-03-03 | 2023-03-03 | Nine-eccentric hard sealing ball valve |
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| Publication Number | Publication Date |
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| CN116123305A true CN116123305A (en) | 2023-05-16 |
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|---|---|---|---|
| CN202310193613.0A Pending CN116123305A (en) | 2023-03-03 | 2023-03-03 | Nine-eccentric hard sealing ball valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117469421A (en) * | 2023-12-04 | 2024-01-30 | 吉富隆智能装备制造集团有限公司 | Five-eccentric rotary valve |
-
2023
- 2023-03-03 CN CN202310193613.0A patent/CN116123305A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117469421A (en) * | 2023-12-04 | 2024-01-30 | 吉富隆智能装备制造集团有限公司 | Five-eccentric rotary valve |
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