CN212338253U - A valve stem explosion-proof ejection ball valve that realizes on-line replacement of packing under pressure - Google Patents
A valve stem explosion-proof ejection ball valve that realizes on-line replacement of packing under pressure Download PDFInfo
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- CN212338253U CN212338253U CN202021703601.6U CN202021703601U CN212338253U CN 212338253 U CN212338253 U CN 212338253U CN 202021703601 U CN202021703601 U CN 202021703601U CN 212338253 U CN212338253 U CN 212338253U
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Abstract
本实用新型公开了一种实现在线带压更换填料的阀杆防爆喷出球阀，涉及球阀技术领域，旨在解决不具备在线带压更换填料的能力，其技术方案要点是：一种实现在线带压更换填料的阀杆防爆喷出球阀，包括阀体、设置于阀体内的阀球，以及连接于阀球的阀杆，所述阀体法兰固定有上阀盖，所述阀杆和上阀盖之间设置有填料，所述阀杆包括与上阀盖同轴转动连接的杆件，以及设置于杆件底端的连接头，所述阀体贯穿开设有供杆件穿过的通孔，所述连接头的直径大于通孔的直径。本实用新型的一种实现在线带压更换填料的阀杆防爆喷出球阀，在卸下上阀盖进行填料的更换时，无需顾虑阀杆被介质压力爆喷而出的隐患，实现在线带压更换填料。
The utility model discloses a valve stem explosion-proof ejection ball valve which realizes on-line replacement of packing under pressure, relates to the technical field of ball valves, and aims to solve the problem of not having the ability to replace packing under on-line pressure. A valve stem explosion-proof ejection ball valve for replacing the packing, including a valve body, a valve ball arranged in the valve body, and a valve stem connected to the valve ball, the valve body flange is fixed with an upper valve cover, the valve stem and the upper valve cover A packing is arranged between the valve covers, the valve stem includes a rod member that is coaxially rotatably connected with the upper valve cover, and a connecting head arranged at the bottom end of the rod member, and the valve body is provided with a through hole for the rod member to pass through. , the diameter of the connector is larger than the diameter of the through hole. The utility model is a valve stem explosion-proof ejection ball valve that realizes online under pressure replacement of packing. When the upper valve cover is removed to replace the packing, there is no need to worry about the hidden danger that the valve stem is burst out by the medium pressure, and the online under pressure is realized. Replace packing.
Description
Technical Field
The utility model relates to a ball valve technical field, more specifically say, it relates to a realize online area and press the explosion-proof blowout ball valve of valve rod of changing filler.
Background
Ball valves have been developed into a major valve variety with their good sealing properties and high flow capacity, and are widely used in various fields; in high-temperature and high-pressure pipelines in the industries of electric power, petrifaction and the like, hard sealing ball valves are mostly used for cutting off and isolating.
The applicant applies for a corrosion-resistant ball valve and a manufacturing method thereof, wherein the corrosion-resistant ball valve is disclosed in Chinese patent with publication number CN105909818B, and the technical key points are as follows: the valve comprises a left end cover, a valve body, a right end cover, a valve ball, a left valve seat and a right valve seat, wherein a left sealing ring mounting groove is formed in a sealing surface, close to the valve ball, of the left valve seat, a first perfluorinated ethylene propylene sealing ring is embedded in the left sealing ring mounting groove, a right sealing ring mounting groove is formed in a sealing surface, close to the valve ball, of the right valve seat, and a second perfluorinated ethylene propylene sealing ring is embedded in the right sealing ring mounting groove; a first surfacing layer is arranged in a gap between the upper cover and the valve body, a second surfacing layer is arranged between the inner wall surfaces of the left valve seat and the left end cover, a third surfacing layer is arranged between the inner wall surfaces of the right valve seat and the right end cover, a fourth surfacing layer is arranged in a gap between the base and the valve body, a fifth surfacing layer is arranged in a gap between the left end cover and the valve body, and a sixth surfacing layer is arranged in a gap between the right end cover and the valve body.
In order to improve the sealing performance of the ball valve, a filler is generally arranged between the upper cover and the valve rod, and the filler between the upper cover and the valve rod is limited by material properties, so that the problems of aging and corrosion damage exist, and the filler between the upper cover and the valve rod needs to be replaced regularly; however, in practical application, it is found that, before the filler is replaced, the ball valve needs to be emptied and decompressed through the decompression valve, if the filler is replaced directly in normal operation, the valve rod is exploded and sprayed due to the pressure of the medium in the ball valve, and potential safety hazards exist, so that the capacity of replacing the filler under pressure on line is not available; therefore, a new solution is needed to solve this problem.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a realize online area and press the explosion-proof blowout ball valve of valve rod of changing filler, when lifting the change that the valve gap carries out the filler off, need not to consider the valve rod and explode the hidden danger that spouts and go out by medium pressure, realize online area and press the change filler.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an realize online area and press explosion-proof blowout ball valve of valve rod of changing filler, includes the valve body, sets up the valve ball in the valve body to and connect in the valve rod of valve ball, the valve body flange is fixed with the upper valve bonnet, be provided with the filler between valve rod and the upper valve bonnet, the valve rod includes the member of being connected with the coaxial rotation of upper valve bonnet to and set up in the connector of member bottom, the valve body runs through and sets up the through-hole that supplies the member to pass, the diameter of connector is greater than the diameter of through-hole.
By adopting the technical scheme, when the valve is assembled, the valve rod needs to be inserted into the through hole from inside to outside, so that the connecting head of the valve rod is positioned in the valve body from the beginning of assembly, the valve ball is arranged in the valve body, the connection between the valve ball and the connecting head is completed, and finally the valve body is integrally assembled; to sum up, this application is through the traditional assembly methods who changes the valve rod for the valve rod can adopt the diameter to be greater than the connector of through-hole, thereby after accomplishing the assembly, realizes that the valve rod is restricted by valve ball and valve body cooperation, before not dismantling the valve ball, and the valve rod only has rotatory activity, and then when lifting the change that the valve gap carried out packing, need not to consider that the valve rod is exploded the hidden danger that spouts and appear by medium pressure, realizes online area pressure change packing.
The utility model discloses further set up to: the valve body includes left valve body, middle valve body and right valve body, left side valve body and right valve body flange respectively are fixed in the both ends of middle valve body.
By adopting the technical scheme, a split valve body structure is adopted, so that technical support is provided for the installation of the valve rod from inside to outside; adopt flange fixed left valve body and right valve body in middle valve body, effectively improve three's assembly strength and assembly leakproofness.
The utility model discloses further set up to: the left valve body and the right valve body are respectively inserted with a stabilizing ring towards the end of the middle valve body, and the stabilizing ring is provided with a graphite ring which is attached to the outer spherical surface of the valve ball; a plurality of stabilizing springs are respectively arranged between the stabilizing ring and the left valve body and between the stabilizing ring and the right valve body; and a fire-proof ring and two O-shaped rings are respectively arranged between the stabilizing ring and the left valve body and between the stabilizing ring and the right valve body.
By adopting the technical scheme, the left valve body and the right valve body are provided with the stabilizing rings, and the two stabilizing rings limit the valve ball in a left-right annular mode, so that the stability of the valve ball is ensured; the stable ring is in contact with the outer spherical surface of the valve ball by utilizing the graphite ring, so that the rotation smoothness of the valve ball is ensured by utilizing the self-lubricating capacity of the graphite ring, and the sealing performance of the spherical surface of the valve ball and the stable ring is improved; stabilizing springs are respectively arranged between the stabilizing ring and the left valve body and between the stabilizing ring and the right valve body, so that potential energy is stored by the stabilizing springs, and the elastic potential energy stored by the stabilizing springs is pushed against the stabilizing rings, so that the graphite rings are always attached to the outer spherical surface of the valve ball; the fire-proof ring is additionally arranged on the stabilizing ring, so that the fire-proof performance between the stabilizing ring and the left valve body or the right valve body is improved; the O-shaped ring is additionally arranged on the stabilizing ring, so that the sealing property between the stabilizing ring and the left valve body or the right valve body is improved.
The utility model discloses further set up to: the lower end face of the valve ball is provided with a rotary hole groove, the lower end face of the middle valve body is spliced and flange-reinforced with a lower valve cover, the lower valve cover is provided with a rotary shaft pin, a first bushing is arranged between the rotary shaft pin and the circumferential face of the rotary hole groove, and a thrust pad is arranged between the rotary shaft pin and the end face of the rotary hole groove.
By adopting the technical scheme, the lower valve cover is additionally arranged on the middle valve body, and the rotating shaft pin arranged on the lower valve cover extends into the middle valve body, so that the rotating shaft pin is matched with the rotating hole groove of the valve ball, the valve ball is further limited, the valve ball only has the rotation mobility along the central axis of the rotating shaft pin, and the stability of the valve ball is effectively improved; a first bushing is additionally arranged between the rotating shaft pin and the rotating hole groove, so that the friction force between the valve ball and the rotating shaft pin is reduced, and the influence of the rotating shaft pin on the smoothness of the rotation of the valve ball is further reduced; a thrust pad is additionally arranged between the rotating shaft pin and the rotating hole groove, so that the thrust pad bears the axial load of the rotating shaft pin and the valve ball.
The utility model discloses further set up to: the upper end face of the valve ball is provided with a straight groove, one end of the straight groove horizontally penetrates through the valve ball, and the connector is provided with a straight part embedded with the straight groove; the bottom surface of the straight groove is provided with a positioning embedded groove, and the bottom end of the straight part is provided with a positioning lug which is embedded with the positioning embedded groove.
By adopting the technical scheme, when the valve ball is assembled, the valve rod is rotated until the straight part of the valve rod is parallel to the central axis of the middle valve body, the valve ball is aligned to the middle valve body, the valve ball is adjusted until the horizontal opening end of the straight groove of the valve ball is aligned to the straight part of the valve rod and is horizontally pushed until the straight groove of the valve ball and the straight groove of the connector are embedded, the lower valve cover is installed until the rotating shaft pin of the lower valve cover is inserted into the rotating hole groove of the valve ball, and after the installation of the lower valve cover is completed, the valve ball is pushed up to the positioning embedded groove and the positioning lug by the rotating shaft pin of the lower valve cover to; to sum up, the straight word portion that the valve ball set up a word groove and connector is connected, thereby go into the in-process of middle valve body at valve ball horizontal migration, can accomplish the connection of valve ball and valve rod, effectively improve connection convenience between them, the gomphosis of location caulking groove and location lug, combine the grafting cooperation of pivot axle and rotation hole groove, realize the both ends restriction to the valve ball, effectively improve the stability of valve ball, it still needs to explain that, the valve ball is to the restriction of valve rod, original power comes from lower valve gap, and lower valve gap is fixed in middle valve body with the form of flange, thereby ensure the restriction effect of valve ball to the valve rod.
The utility model discloses further set up to: the valve is characterized in that a second bushing is arranged between the rod piece and the through hole, an embedded ring groove is formed in the inner surface of the middle valve body along the through hole, and a thrust ring gasket is arranged between the embedded ring groove and the connector.
By adopting the technical scheme, the second bushing is additionally arranged between the rod piece and the through hole, so that the coaxiality of the valve rod and the through hole is improved, the friction force borne by the valve rod is reduced, and the rotation smoothness of the valve rod is improved; and a thrust ring pad is additionally arranged between the middle valve body and the connector and is matched with the thrust pad between the rotating shaft pin and the rotating hole groove, so that the mobility of the valve ball along the vertical axis is effectively limited, and the stability of the valve ball is further improved.
The utility model discloses further set up to: the upper valve cover comprises a neck and a flange plate with a flange fixed at the top end of the neck; the outer surface of the valve body is provided with an assembly plane along the through hole, the bottom end of the neck is embedded and abutted to the assembly plane and is reinforced by bolts, and a third bushing is arranged between the flange plate and the rod piece.
By adopting the technical scheme, the upper valve cover is assembled with the valve body by utilizing the neck, and a mounting position is provided by utilizing the flange plate, and the mounting position can be provided with a device for driving the valve rod; the valve body is provided with an assembly plane for the bottom end of the neck to be attached, and bolts are arranged for reinforcement, so that the assembly strength of the neck and the valve body is ensured; and a third bushing is additionally arranged between the flange plate and the rod piece, so that the influence of the flange plate on the rotation smoothness of the valve rod is reduced.
The utility model discloses further set up to: the bottom end of the neck is provided with a reverse embedding edge, the reverse embedding edge is embedded into the through hole, and a first sealing ring is arranged between the reverse embedding edge and the through hole; the anti-embedding is followed the cover and is equipped with sealed the pad, sealed fill between lower terminal surface of neck and assembly plane.
By adopting the technical scheme, the neck is additionally provided with the reverse embedding edge which is embedded into the through hole, so that the assembly coaxiality of the neck and the through hole is ensured; the reverse embedding edge is additionally provided with a first sealing ring, so that the assembly sealing performance of the neck and the valve body is improved; the anti-embedding edge is sleeved with a sealing gasket, so that the sealing property between the neck and the valve body is further improved.
The utility model discloses further set up to: the inner circumferential surface of the neck is provided with a plurality of annular grooves, the annular grooves are embedded with second sealing rings, and the second sealing rings are attached to the rod piece.
Through adopting above-mentioned technical scheme, the neck adds the annular and is used for installing the second sealing washer to realize sealed between neck and the member by the second sealing washer.
The utility model discloses further set up to: the neck top is provided with and holds the annular, the ring flange is just being provided with the pressure edge to holding the annular, it is flexible graphite circle to pack, and it is in and holds the annular and compress tightly by pressing the edge, the interior circumference of packing closely laminates the member.
By adopting the technical scheme, the filler is embedded into the containing ring groove of the neck, the flange plate is additionally provided with the pressing edge to compress the filler, so that the installation of the filler is realized, and the inner circumferential surface of the filler is tightly attached to the rod piece, so that the second resealing between the rod piece and the upper valve cover is realized; it should explain at last, when taking place to leak between discovery neck and the valve body, need dismantle whole upper valve gap, and change first sealing washer and sealed the pad, when taking place to leak between discovery valve rod and the ring flange, need dismantle the ring flange, and change and pack, when taking place to leak between discovery neck and the ring flange, need dismantle whole upper valve gap, split neck and ring flange again, change and pack and second sealing washer, above three kinds of maintenance condition homoenergetic enough take the area in-process to go on in the operation, all need not to consider the valve rod and exploded the hidden danger that spouts by medium pressure, thereby for changing first sealing washer, sealed the pad, pack and second sealing washer and facilitate.
To sum up, the utility model discloses following beneficial effect has: according to the method, the traditional assembly mode of the valve rod is changed, so that the valve rod can adopt the connector with the diameter larger than that of the through hole, the valve rod is limited by the matching of the valve ball and the valve body after the assembly is completed, the valve rod only has rotary activity before the valve ball is not disassembled, and further when the upper valve cover is disassembled to replace the filler, the hidden danger caused by the explosion and the blowout of the valve rod by medium pressure does not need to be considered, and the filler is replaced under pressure on line; a split valve body structure is adopted, so that technical support is provided for the installation of the valve rod from inside to outside; the two stabilizing rings limit the valve ball in a left-right annular shape, so that the stability of the valve ball is ensured; the stable ring is in contact with the outer spherical surface of the valve ball by utilizing the graphite ring, so that the rotation smoothness of the valve ball is ensured by utilizing the self-lubricating capacity of the graphite ring, and the sealing performance of the spherical surface of the valve ball and the stable ring is improved; the potential energy is stored by the stabilizing spring, and then the elastic potential energy stored by the stabilizing spring is used for pushing the stabilizing ring, so that the graphite ring is always attached to the outer spherical surface of the valve ball; the fire-proof ring is additionally arranged on the stabilizing ring, so that the fire-proof performance between the stabilizing ring and the left valve body or the right valve body is improved; the O-shaped ring is additionally arranged on the stabilizing ring, so that the sealing property between the stabilizing ring and the left valve body or the right valve body is improved; the rotating shaft pin is matched with a rotating hole groove of the valve ball, so that the valve ball is further limited; a first bush is additionally arranged between the rotating shaft pin and the rotating hole groove, so that the friction force between the valve ball and the rotating shaft pin is reduced; a thrust pad is additionally arranged between the rotating shaft pin and the rotating hole groove, so that the thrust pad bears the axial load of the rotating shaft pin and the valve ball; the valve ball is provided with the straight groove and connected with the straight part of the connector, so that the valve ball and the valve rod can be connected in the process of horizontally moving the valve ball into the middle valve body, and the connection convenience of the valve ball and the valve rod is effectively improved; the embedding of the positioning caulking groove and the positioning lug is combined with the splicing and matching of the rotating shaft pin and the rotating hole groove, so that the two ends of the valve ball are limited, and the stability of the valve ball is effectively improved; the valve ball limits the valve rod, the original force comes from the lower valve cover, and the lower valve cover is fixed on the middle valve body in a flange mode, so that the limiting effect of the valve ball on the valve rod is ensured; a thrust ring pad is additionally arranged between the middle valve body and the connector and is matched with the thrust pad between the rotating shaft pin and the rotating hole groove, so that the mobility of the valve ball along the vertical axis is effectively limited, and the stability of the valve ball is further improved; the reverse embedding edge is additionally provided with a first sealing ring, so that the assembly sealing performance of the neck and the valve body is improved; the multiple maintenance condition homoenergetic is pressed the in-process in the operation and is gone on, all need not to consider the valve rod and explode the hidden danger that spouts and go out by medium pressure to for changing first sealing washer, sealed pad, packing and second sealing washer facilitate.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an exploded view of the present invention;
fig. 3 is a vertical partial sectional view of the present invention;
fig. 4 is a horizontal partial sectional view of the present invention;
FIG. 5 is a schematic diagram of the restriction of the present invention to the valve ball;
FIG. 6 is a schematic structural view of the valve ball of the present invention;
fig. 7 is a schematic structural view of the lower valve cover of the present invention;
FIG. 8 is a schematic view of another perspective of the valve ball of the present invention;
fig. 9 is a schematic structural view of the valve rod of the present invention;
fig. 10 is a view showing the fitting relationship between the valve stem and the upper valve cover according to the present invention, and is partially cut away for the convenience of illustration.
Description of the drawings: 1. a valve body; 11. a through hole; 12. a left valve body; 13. an intermediate valve body; 14. a right valve body; 15. a stabilizing ring; 16. a graphite ring; 17. a stabilizing spring; 18. a fire collar; 19. an O-shaped ring; 2. a valve ball; 21. rotating the hole slot; 22. a lower valve cover; 23. a roller pin; 24. a first bushing; 25. a thrust pad; 26. a straight slot; 3. a valve stem; 31. a rod member; 32. a connector; 33. a straight portion; 34. positioning the caulking groove; 35. positioning the bump; 36. a second bushing; 37. embedding the ring groove; 38. a thrust ring pad; 4. an upper valve cover; 41. a neck portion; 42. a flange plate; 43. assembling a plane; 44. a third bushing; 45. an anti-embedding edge; 46. a first seal ring; 47. a gasket; 48. a ring groove; 49. a second seal ring; 5. a filler; 50. a receiving ring groove; 51. and pressing the edges.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides an realize online area and press explosion-proof blowout ball valve of valve rod of changing packing, as shown in figure 1, figure 2, figure 3, figure 4 is shown, including valve body 1, set up the valve ball 2 in valve body 1, and connect in the valve rod 3 of valve ball 2, 1 flange of valve body is fixed with upper valve cap 4, be provided with packing 5 between valve rod 3 and the upper valve cap 4, valve rod 3 includes the member 31 of being connected with the coaxial rotation of upper valve cap 4, and machine-shaping is in the connector 32 of member 31 bottom, valve body 1 runs through and sets up the through-hole 11 that supplies member 31 to pass, the diameter of connector 32 is greater than the diameter of through-hole 11.
During assembly, the valve rod 3 needs to be inserted into the through hole 11 from inside to outside, so that the connector 32 of the valve rod 3 is positioned in the valve body 1 from the beginning of assembly, the valve ball 2 is arranged in the valve body 1, the connection between the valve ball 2 and the connector 32 is completed, and finally the valve body 1 is integrally assembled; to sum up, this application is through the traditional assembly methods who changes valve rod 3 for valve rod 3 can adopt the diameter to be greater than the connector 32 of through-hole 11, thereby after accomplishing the assembly, realizes that valve rod 3 is restricted by the cooperation of valve ball 2 and valve body 1, before not dismantling valve ball 2, and valve rod 3 only has rotatory activity, and then when taking off upper valve cover 4 and carrying out the change of packing 5, need not to consider that valve rod 3 is exploded the hidden danger that spouts and go out by medium pressure, realizes online area pressure change packing 5.
The specific structure of the valve body 1 is as follows, as shown in fig. 1 and fig. 2, the valve body 1 comprises a left valve body 12, a middle valve body 13 and a right valve body 14, so that technical support is provided for the installation of the valve rod 3 from inside to outside by adopting the structure of the split valve body 1; it should be noted that the left valve body 12 and the right valve body 14 are respectively flange-fixed at two ends of the middle valve body 13, so as to ensure the assembling strength and the assembling tightness of the three.
In order to ensure the stability of the valve ball 2, as shown in fig. 2 and 4, the left valve body 12 and the right valve body 14 are respectively inserted with a stabilizing ring 15 towards the end of the middle valve body 13, the graphite ring 16 is fixedly embedded in the stabilizing ring 15 and is attached to the outer spherical surface of the valve ball 2, so that the two stabilizing rings 15 form a left ring and a right ring to limit the valve ball 2, and the stability of the valve ball 2 is further improved.
The stabilizer ring 15 is in contact with the outer spherical surface of the valve ball 2 in such a manner that, as shown in fig. 2 and 4, a plurality of stabilizer springs 17 are respectively interposed between the stabilizer ring 15 and the left valve element 12 and between the stabilizer ring 15 and the right valve element 14, thereby ensuring smooth rotation of the valve ball 2 by utilizing the self-lubricating ability of the graphite ring 16 and improving the sealing property between the spherical surface of the valve ball 2 and the stabilizer ring 15.
In order to improve the fire-proof performance and the sealing performance between the stabilizing ring 15 and the left valve body 12 and the right valve body 14, as shown in fig. 2 and 4, a fire-proof ring 18 and two O-rings 19 are respectively filled between the stabilizing ring 15 and the left valve body 12 and between the stabilizing ring 15 and the right valve body 14.
In order to improve the rotational stability of the valve ball 2, as shown in fig. 3, 6 and 7, a rotary hole groove 21 is formed on the lower end surface of the valve ball 2, a lower valve cover 22 is inserted and fixed to the lower end surface of the middle valve body 13, and a rotary shaft pin 23 is integrally formed on the lower valve cover 22, so that the rotary shaft pin 23 is matched with the rotary hole groove 21 of the valve ball 2, further limitation on the valve ball 2 is realized, the valve ball only has the rotation activity along the central axis of the rotary shaft pin 23, and the rotational stability of the valve ball 2 is effectively improved; it should be noted that, a first bushing 24 is disposed between the rotating shaft pin 23 and the circumferential surface of the rotating hole slot 21, so as to reduce the friction between the valve ball 2 and the rotating shaft pin 23, and further reduce the influence of the rotating shaft pin 23 on the smoothness of rotation of the valve ball 2; it should also be noted that a thrust pad 25 is provided between the spindle pin 23 and the end face of the rotary hole groove 21, so that the thrust pad 25 receives the axial load between the spindle pin 23 and the valve ball 2.
The valve ball 2 is connected with the valve rod 3 in the following way, as shown in fig. 4, 8 and 9, a straight groove 26 is formed on the upper end face of the valve ball 2 in a processing mode, one end of the straight groove 26 horizontally penetrates through the valve ball 2, a straight part 33 embedded with the straight groove 26 is formed on the connecting head 32 in a processing mode, a positioning embedded groove 34 is formed on the bottom face of the straight groove 26 in a processing mode, and a positioning lug 35 embedded with the positioning embedded groove 34 is formed at the bottom end of the straight part 33 in a processing mode; when the valve ball 2 is assembled, the valve rod 3 is rotated until the straight part 33 of the valve rod is parallel to the central axis of the middle valve body 13, the valve ball 2 is aligned to the middle valve body 13, the valve ball 2 is adjusted until the horizontal opening end of the straight groove 26 of the valve ball 2 is aligned to the straight part 33 of the valve rod 3, and the valve ball is horizontally pushed until the straight groove 26 of the valve ball 2 and the straight groove 26 of the connector 32 are completely embedded, the lower valve cover 22 is installed until the rotating shaft pin 23 of the lower valve cover 22 is inserted into the rotating hole groove 21 of the valve ball 2, and after the installation of the lower valve cover 22 is completed, the valve ball 2 is pushed up by the rotating shaft pin 23 of the lower valve cover until the positioning embedded groove; in summary, the valve ball 2 is provided with the linear groove 26 and the linear portion 33 of the connector 32 for connection, so that in the process that the valve ball 2 horizontally moves into the middle valve body 13, the connection between the valve ball 2 and the valve rod 3 can be completed, the connection convenience between the valve ball 2 and the valve rod is effectively improved, the embedding of the positioning embedded groove 34 and the positioning convex block 35 is combined with the insertion and connection matching of the rotating shaft pin 23 and the rotating hole groove 21, the limitation on the two ends of the valve ball 2 is realized, and the stability of the valve ball 2 is effectively improved, it should be noted that the original force of the valve ball 2 on the valve rod 3 is from the lower bonnet 22, and the lower bonnet 22 is fixed on the middle valve body 13 in the form of a flange, so that the limitation effect of the valve ball 2 on the valve.
In order to improve the connection effect between the valve rod 3 and the through hole 11, as shown in fig. 3, 4 and 5, a second bushing 36 is padded between the rod 31 and the through hole 11, so that the coaxiality between the valve rod 3 and the through hole 11 is improved, the friction force applied to the valve rod 3 is reduced, and the rotation smoothness is improved; the inner surface of the intermediate valve body 13 is provided with an embedded ring groove 37 along the through hole 11, and a thrust ring pad 38 is arranged between the embedded ring groove 37 and the connector 32, so that the thrust pad 25 between the rotating shaft pin 23 and the rotating hole groove 21 is matched, the movement degree of the valve ball 2 in vertical axis movement is effectively limited, and the stability of the valve ball 2 is further improved.
The upper cover 4 has a specific structure as shown in fig. 2, 3 and 4, and the upper cover 4 includes a neck portion 41 and a flange 42 flanged to the top end of the neck portion 41, so that the upper cover 4 is assembled with the valve body 1 by the neck portion 41, and a mounting position where a device for driving the valve stem 3 can be mounted is provided by the flange 42.
In order to ensure the assembling strength of the neck portion 41 and the valve body 1, as shown in fig. 2, the outer surface of the valve body 1 is processed and formed with an assembling plane 43 along the through hole 11, the bottom end of the neck portion 41 is embedded and abutted to the assembling plane 43 and is bolt-fastened, so that the assembling strength of the neck portion 41 and the valve body 1 is ensured; it should be noted that a third bushing 44 is disposed between the flange 42 and the rod 31, so as to reduce the influence of the flange 42 on the smooth rotation of the valve rod 3.
The neck part 41 is connected with the valve body 1 in such a way that, as shown in fig. 3 and 10, the bottom end of the neck part 41 is processed and formed with a reverse embedding edge 45, and the reverse embedding edge 45 is embedded in the through hole 11, so that the assembly coaxiality of the neck part 41 and the through hole 11 is ensured; in order to improve the sealing performance between the neck part 41 and the valve body 1, a first sealing ring 46 is arranged between the reverse embedding edge 45 and the through hole 11 in a cushioning mode, so that the assembling sealing performance of the neck part 41 and the valve body 1 is improved; in order to further improve the assembly sealing performance of the neck 41 and the valve body 1, the reverse embedding edge 45 is sleeved with a sealing gasket 47, and the sealing gasket 47 is filled between the lower end face of the neck 41 and the assembly plane 43, so that double sealing of the neck 41 and the valve body 1 is realized, and the sealing performance between the neck 41 and the valve body 1 is further improved.
In order to improve the sealing performance between the neck portion 41 and the stem 3, as shown in fig. 10, a plurality of annular grooves 48 are formed on the inner circumferential surface of the neck portion 41, a second seal ring 49 is fitted into the annular grooves 48, and the second seal ring 49 is bonded to the rod 31, so that the neck portion 41 and the stem 3 are sealed by the second seal ring 49.
The packing 5 is disposed between the upper bonnet 4 and the stem 3 in such a manner that, as shown in fig. 10, a receiving ring groove 50 is formed at the top end of the neck 41, the flange 42 faces the receiving ring groove 50 and is integrally formed with a pressing edge 51, the packing 5 is a flexible graphite ring, is positioned in the receiving ring groove 50 and is pressed by the pressing edge 51, and the inner circumferential surface of the packing 5 is tightly attached to the stem 31, so that the packing can achieve not only the sealing between the upper bonnet 4 and the stem 3, but also the sealing between the flange 42 and the neck 41.
Finally, it should be noted that, when leakage is found between the neck 41 and the valve body 1, the whole upper valve cover 4 needs to be disassembled, the first sealing ring 46 and the sealing gasket 47 need to be replaced, when leakage is found between the valve rod 3 and the flange plate 42, the flange plate 42 needs to be disassembled, the packing 5 needs to be replaced, when leakage is found between the neck 41 and the flange plate 42, the whole upper valve cover 4 needs to be disassembled, the neck 41 and the flange plate 42 are disassembled, the packing 5 and the second sealing ring 49 need to be replaced, the three maintenance conditions can be carried out in the operation process under pressure, the hidden danger caused by explosion and blowout of the valve rod 3 due to medium pressure does not need to be considered, and convenience is provided for replacing the first sealing ring 46, the sealing gasket 47, the packing 5 and the second sealing ring 49.
The specific embodiments are only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021703601.6U CN212338253U (en) | 2020-08-14 | 2020-08-14 | A valve stem explosion-proof ejection ball valve that realizes on-line replacement of packing under pressure |
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| CN202021703601.6U CN212338253U (en) | 2020-08-14 | 2020-08-14 | A valve stem explosion-proof ejection ball valve that realizes on-line replacement of packing under pressure |
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| CN212338253U true CN212338253U (en) | 2021-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878603A (en) * | 2020-08-14 | 2020-11-03 | 五洲阀门股份有限公司 | A valve stem explosion-proof ejection ball valve that realizes on-line replacement of packing under pressure |
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2020
- 2020-08-14 CN CN202021703601.6U patent/CN212338253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878603A (en) * | 2020-08-14 | 2020-11-03 | 五洲阀门股份有限公司 | A valve stem explosion-proof ejection ball valve that realizes on-line replacement of packing under pressure |
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