CN210949999U - Ring surface ball core and ball valve - Google Patents

Abstract

The utility model discloses a toroidal ball core, which comprises a ball core body, a full-open sealing ring, a full-close sealing ring and a support shaft, wherein the ball core body is provided with a through material channel, the full-open sealing ring and the full-close sealing ring are both arranged on the surface of the ball core body in an outward protruding way, the full-open sealing ring is arranged at the channel opening and is arranged in the full-open sealing ring, the axis of the full-close sealing ring is vertical to and intersected with the axis of the full-open sealing ring, the ball core body in the full-close sealing ring is a partition surface, the sealing surface of the full-open sealing ring and the sealing surface of the full-close sealing ring are on the same spherical surface, the outer wall surface of the full-open sealing ring and the outer wall surface of the full-close sealing ring are cylindrical surfaces which are respectively coaxial with the full-open sealing ring, the inner wall surface of the full-open sealing ring and the inner wall surface of the full, the utility model provides a anchor ring core and ball valve, long service life.

Description

Ring surface ball core and ball valve

Technical Field

The utility model relates to a valve field especially relates to anchor ring core and ball valve.

Background

Pipelines for conveying liquid, gas and solid mixed media in the industrial fields of petroleum, chemical industry, electric power, metallurgy, building materials and the like generally need to be adjusted and shut by using a valve, and a ball valve is one of common valves.

The existing traditional ball core is characterized in that a material channel 2 for material circulation is arranged in the ball core body 1, the material channel 2 penetrates through two opposite sides of the ball core body 1 and forms a channel opening on the surface of the ball core body 1, the channel opening is respectively an upstream channel opening and a downstream channel opening, the ball core body 1 is installed in a valve body 3, valve seats 4 matched with the ball core body 1 are arranged at two opposite ends of the valve body 3, the valve seats 4 at two ends are provided with valve seat 4 channels, the valve seats are respectively an upstream valve seat channel 41 and a downstream valve seat channel 42, the valve seat 4 channels are provided with valve seat sealing surfaces 43 matched with the surface of the ball core body 1, materials flow into the downstream valve seat channel 42 from the upstream valve seat channel 41 through the material channel 2 in the ball core body 1, the conveyed materials are media with solids, and the existing ball valve mainly has the following problems:

firstly, when the valve is partially opened, most of materials flow into the downstream valve seat passage 42 from the upstream valve seat passage 41 through the material passage 2, and simultaneously, a small part of materials flow into the valve cavity 31 through the other half gap between the outlet of the upstream valve seat passage 41 and the upstream passage port, the materials flowing into the valve cavity 31 are easy to accumulate, and no matter how the ball core body 1 rotates, the materials accumulated in the valve cavity 31 are difficult to flow into the downstream valve seat passage 42 by itself, the materials in the valve cavity 31 are deposited and easily blocked, so that the ball valve cannot be opened or closed continuously, even is locked, and the like, thereby causing the potential safety and service life hazards of the valve, and being particularly not suitable for the circulation and the shutoff of solid media;

secondly, when the valve is partially opened, especially in a small opening state (i.e. when the ball valve is just opened or is about to be closed), the material can only flow in from a gap on one side between the outlet of the upstream valve seat channel 41 and the upstream channel port of the ball core body 1, passes through the material channel 2 of the ball core body 1 and the valve cavity 31, and flows out from a gap on one side between the inlet of the downstream valve seat channel 42 and the downstream channel port of the ball core body 1, the gap is small, the flow rate of the material at the gap is large, and the material flowing at a high speed seriously washes the inner side of the outlet of the upstream valve seat channel 41, the inner side of the inlet of the downstream valve seat channel 42, the inner side of the upstream channel port of the material channel 2 of the ball core body 1 and the inner side;

thirdly, the rest parts of the surface of the ball core body 1 except the upstream channel port and the downstream channel port are sealing surfaces, in the rotating process of the ball core body 1, the valve seat sealing surface 43 always has sliding friction with the surface of the ball core body 1, the surface area of the valve seat sealing surface 43 passing through the ball core body 1 is large every time the ball valve is opened and closed, the friction area is large, the abrasion of the valve seat sealing surface 43 is large, and the service life of the ball valve is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a torus ball core and ball valve can sweep the material in the valve pocket, makes in it gets into low reaches disk seat passageway by oneself to when can reduce the valve part and open, the velocity of flow of passageway department material alleviates the material to the erodeing of disk seat and ball core body, and simultaneously, the ball core body rotates and reduces the sealed face wearing and tearing of disk seat, and the ball valve is resistant washout nature good, ball valve long service life.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a toroidal ball core, which comprises a ball core body, a full-open sealing ring, a full-close sealing ring and a support shaft, wherein the ball core body is rotatably arranged in a valve cavity, the ball core body is provided with a material passage, the material passage penetrates through the ball core body and forms a passage opening on the surface of the ball core body, the full-open sealing ring and the full-close sealing ring are both arranged on the surface of the ball core body and both protrude outwards, the full-open sealing ring is provided with a full-open sealing ring sealing surface, a full-open sealing ring inner wall surface and a full-open sealing ring outer wall surface, the full-close sealing ring is provided with a full-close sealing ring sealing surface, a full-close sealing ring inner wall surface and a full-close sealing ring outer wall surface, the full-open sealing ring is arranged at the passage opening and the passage opening is arranged in the inner ring of the, the axial line of the fully-closed sealing ring is perpendicular to and intersected with the axial line of the fully-opened sealing ring, the surface of the ball core body in the inner ring of the sealing surface of the fully-closed sealing ring is a partition surface, the sealing surface of the fully-opened sealing ring and the sealing surface of the fully-closed sealing ring are both cambered surfaces and are on the same spherical surface, the outer wall surface of the fully-opened sealing ring is a cylindrical surface coaxial with the fully-opened sealing ring, the outer wall surface of the fully-closed sealing ring is a cylindrical surface coaxial with the fully-closed sealing ring, the inner wall surface of the fully-opened sealing ring is a plane and is perpendicular to the axial line of the fully-opened sealing ring, the inner wall surface of the fully-closed sealing ring is a plane and is perpendicular to the axial line of the fully-closed sealing ring, the fully-opened sealing ring is used for isolating the communication between the upstream valve seat channel and/or the downstream valve seat channel and the valve cavity when the, the middle parts of two opposite sides of the ball core body respectively extend outwards to form the support shafts, the support shafts on the two sides of the ball core body are used as rotating shafts of the ball core body and are perpendicular to the plane where the axis of the fully-opened sealing ring and the axis of the fully-closed sealing ring are located, and one support shaft is provided with a valve rod connecting groove.

The utility model has the advantages that: when the ball valve is fully opened, the valve cavity is separated by the cooperation of the fully-opened sealing ring and the sealing surface of the valve seat, when the ball valve is fully closed, the upstream valve seat flow passage and the downstream valve seat flow passage are cut off by the fully-closed sealing ring and the separating surface, when the ball valve is in a partially opened state, part of materials flow from the upstream valve seat passage to the downstream valve seat passage through the valve cavity from the surface of the ball core body, and at the moment, the materials in the valve cavity are in a flowing state, the flowing materials automatically clean the valve cavity, the materials cannot be deposited in the valve cavity for a long time, and when the ball valve is in a partially opened state, a plurality of material flowing passages are additionally arranged between the surface of the ball core body and the valve cavity, so that the flowing speed of the materials is reduced, and the scouring of the materials to the valve seat and the ball core is reduced; when the toroidal ball core rotates, the sealing surface of the valve seat only generates friction with the sealing surface of the fully-opened sealing ring and the sealing surface of the fully-closed sealing ring, compared with the existing ball valve, the friction area and the relative distance of friction are greatly reduced, and the abrasion to the sealing surface of the valve seat is greatly reduced; meanwhile, the outer wall surface of the fully-opened sealing ring and the outer wall surface of the fully-closed sealing ring are cylindrical surfaces which are coaxial with the outer wall surface of the fully-opened sealing ring and the outer wall surface of the fully-closed sealing ring respectively, the inner wall surface of the fully-opened sealing surface and the inner wall surface of the fully-closed sealing ring are planes which are vertical to the respective axes of the fully-opened sealing ring and the fully-closed sealing ring respectively, the fully-opened sealing ring and the fully-closed sealing ring are high in strength, not prone to deformation.

Further, the partition surface is an outward convex spherical surface, and the distance from the outward convex spherical surface to the spherical center of the spherical surface where the fully-opened sealing ring sealing surface and the fully-closed sealing ring sealing surface are located is smaller than the radius of the spherical surface where the fully-opened sealing ring sealing surface and the fully-closed sealing ring sealing surface are located.

The beneficial effect of adopting the further scheme is that: thick in the middle of the evagination sphere, thin all around, the material intermediate pressure that comes is carried to upper reaches disk seat passageway is big, pressure is little all around, can improve the intensity of ball case, non-deformable, it is big to turn off the pressure differential, safe and reliable, and the partition surface is the evagination sphere, no edges and corners, when the valve is half-opened, the difficult deposit of material is on partition surface, material flow capacity is strong, erode disk seat and ball core body and reduce and wash everywhere evenly, the valve pocket self-cleaning is effectual, long service life.

Furthermore, the surface of the ball core body is provided with a plane part between the outer wall surface of the full-open sealing ring and the outer wall surface of the full-close sealing ring, the plane part is parallel to the plane where the axis of the full-open sealing ring and the axis of the full-close sealing ring are located, the plane part is arranged on two opposite sides of the ball core body, the support shafts on the two sides of the ball core body are formed by outwards extending the centers of the plane parts, and the distance from the plane parts to the spherical centers of the spherical surfaces where the sealing surfaces of the full-open sealing ring and the sealing surfaces of the full-close sealing ring are located is smaller than the radius of the spherical surfaces where the sealing surfaces of the full-open sealing ring.

The beneficial effect of adopting the further scheme is that: plane portion is parallel with material flow direction, can reduce the blockking that flows to the material in the valve pocket, and the material can not pile up at plane portion, and material flow capacity is strong, and the valve pocket is automatically cleaned effectually.

Furthermore, the surface of the ball core body between the outer wall surface of the fully-opened sealing ring and the outer wall surface of the fully-closed sealing ring is composed of a spherical surface part and the plane part, the spherical surface part and the convex spherical surface are on the same spherical surface, and the spherical center of the spherical surface where the spherical surface part and the convex spherical surface are located is coincided with the spherical center of the spherical surface where the sealing surface of the fully-opened sealing ring and the sealing surface of the fully-closed sealing ring are located.

The beneficial effect of adopting the further scheme is that: the strength of the ball core body is high, the ball core body is not easy to deform, the turn-off pressure difference is large, and the ball core is safe and reliable; when the valve is half opened, the newly added material channel of the toroidal ball core has strong flow capacity, and the scouring of the valve seat and the ball core is reduced and uniform; the medium is difficult for the deposit on the surface of ball core body, and valve pocket self-cleaning's is effectual, and all places on ball core body surface except that full open sealing ring seal face and full closed sealing ring seal face all not with the sealed face contact friction of disk seat, and the friction area is little, and the wearing and tearing of disk seat seal face are little, ball valve long service life.

Furthermore, the channel opening is a round opening, and the front and the back of the material channel are equal in diameter.

The beneficial effect of adopting the further scheme is that: reduce the scouring and abrasion of the flowing materials to the channel openings and the material channels.

Further, the fully-opened sealing ring comprises a first sealing ring and a second sealing ring, the fully-closed sealing ring comprises a third sealing ring and a fourth sealing ring, the axes of the first sealing ring and the second sealing ring are coincident, the first sealing ring and the second sealing ring are respectively arranged at the passage openings at two opposite sides of the ball core body, the passage openings at two opposite sides of the ball core body are respectively arranged in the inner ring of the sealing surface of the first sealing ring and the inner ring of the sealing surface of the second sealing ring, the axes of the third sealing ring and the fourth sealing ring are coincident, the third sealing ring and the fourth sealing ring are respectively arranged at two opposite sides of the ball core body, the axis of the first sealing ring is perpendicular to and intersected with the axis of the third sealing ring, and the first sealing ring, the third sealing ring, the second sealing ring and the fourth sealing ring are sequentially arranged along the circumference of the ball core body, the sealing surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all cambered surfaces and are on the same spherical surface, the support shaft is perpendicular to the plane where the axis of the first sealing ring and the axis of the third sealing ring are located and penetrates through the spherical centers of the spherical surfaces where the sealing surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are located, the first and third sealing rings fitting with an outlet of the upstream seat channel, the second and fourth sealing rings fitting with an inlet of the downstream seat channel, the outer wall surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all cylindrical surfaces which are coaxial with the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring, the inner wall surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all planes which are vertical to the respective axes;

when the ball valve is fully opened, the first sealing ring separates an outlet of the upstream valve seat passage from the valve cavity, and the second sealing ring separates an inlet of the downstream valve seat passage from the valve cavity;

when the ball valve is completely closed, the outlet of the upstream valve seat channel is cut off from the valve cavity by the third sealing ring and the blocking surface therein, and the inlet of the downstream valve seat channel is cut off from the valve cavity by the fourth sealing ring and the blocking surface therein.

The beneficial effect of adopting the further scheme is that: the strength of the toroidal ball core is higher, the toroidal ball core is not easy to deform, the toroidal ball core is safer and more reliable, and the valve can be turned off in two directions.

The utility model discloses a ball valve, including valve body, upper reaches disk seat passageway, low reaches disk seat passageway and foretell anchor ring ball core, the valve body cavity, the hollow portion is in the valve pocket in the valve body inner chamber, the export of upper reaches disk seat passageway with the coaxial setting of entry of low reaches disk seat passageway and all with the valve pocket intercommunication, anchor ring ball core install in just pass through in the valve pocket the back shaft with the valve body rotates to be connected, the export of upper reaches disk seat passageway with the axis of the entry of low reaches disk seat passageway all passes open the axis of sealing ring entirely with the nodical just of the axis of full cut-off sealing ring is in the axis of full cut-off sealing ring with on the axis place plane of full cut-off sealing ring.

The utility model has the advantages that: the valve cavity of the ball valve can be automatically cleaned, the ball valve is less washed by materials when the ball valve is partially opened, the self-abrasion of the sealing surface of the valve seat is less, and the ball valve is safe, reliable and long in service life.

The valve rod penetrates through the valve body and is in transmission connection with the support shaft with the valve rod connecting groove, the valve rod is in rotating connection with the valve body through sealing packing, and the support shaft is in clearance fit with the valve rod.

The beneficial effect of adopting the further scheme is that: the material in the valve cavity erodes the back shaft, can not erode the valve rod, and the back shaft still can play the effect that the effort of pressure differential effect on the anchor ring ball core when supporting the ball valve and turn-off, and reducible valve intracavity material flows the impact to the valve rod, avoids the valve rod slope, influences sealing filler, extension sealing filler life.

Drawings

FIG. 1 is a schematic structural view of a core body of the prior art;

FIG. 2 is a schematic structural view of a prior art ball valve;

FIG. 3 is a perspective view of an embodiment of a toroidal core;

FIG. 4 is a view of the port side of an embodiment of a toroidal core;

FIG. 5 is a cut-off side view of an embodiment of a toroidal core;

FIG. 6 is a top view of an embodiment of a toroidal core;

FIG. 7 is one of the embodiments of the ball valve fully opened;

FIG. 8 is a second schematic view of the embodiment of the ball valve fully open;

FIG. 9 is one of the schematic views of an embodiment of the ball valve fully closed;

FIG. 10 is a second schematic view of the embodiment of the ball valve fully closed;

FIG. 11 is one of the schematic views of an embodiment of the ball valve when partially open;

FIG. 12 is a second schematic view of the embodiment of the ball valve partially open;

in the figure: 1-a ball core body, 11-a partition surface, 12-a spherical surface part, 13-a plane part, 2-a material channel, 3-a valve body, 31-a valve cavity, 4-a valve seat, 41-an upstream valve seat channel, 42-a downstream valve seat channel, 43-a valve seat sealing surface, 5-a fully-closed sealing ring, 51-a fully-closed sealing ring sealing surface, 52-a fully-closed sealing ring inner wall surface, 53-a fully-closed sealing ring outer wall surface, 6-a fully-opened sealing ring, 61-a fully-opened sealing ring sealing surface, 62-a fully-opened sealing ring inner wall surface, 63-a fully-opened sealing ring outer wall surface, 7-a support shaft, 71-a valve rod connecting.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in fig. 3-12, the present invention discloses an embodiment of a toroidal core, which comprises a core body 1, a fully-opened sealing ring 6, a fully-closed sealing ring 5 and a supporting shaft 7, wherein the core body 1 can be selected from the existing spherical or non-spherical core body 1, preferably the spherical core body 1, the core body 1 is rotatably installed in a valve cavity 31, the core body 1 has a material passage 2 for material to flow through, the material passage 2 penetrates through the core body 1 and forms a passage opening on the surface of the core body 1, the passage opening is preferably a round opening, the material passage 2 is preferably a cylindrical passage with two ends penetrating, the front and back of the material passage 2 are equal in diameter, the fully-opened sealing ring 6 and the fully-closed sealing ring 5 are both disposed on the surface of the core body 1 and both protrude outwards, the fully-opened sealing ring 6 has a fully-opened sealing ring sealing surface 61, a fully-opened sealing ring inner wall surface 62 and a fully-opened sealing, the fully-closed sealing ring 5 is provided with a fully-closed sealing ring sealing surface 51, a fully-closed sealing ring inner wall surface 52 and a fully-closed sealing ring outer wall surface 53, the fully-opened sealing ring 6 is arranged at the position of a channel opening, the channel opening is arranged in an inner ring of the fully-opened sealing ring sealing surface 61, the fully-opened sealing ring 6 is coaxial with the material channel 2, the axis of the fully-closed sealing ring 5 is vertical to and intersected with the axis of the fully-opened sealing ring 6, the surface of the ball core body 1 in the inner ring of the fully-closed sealing ring sealing surface 51 is a partition surface 11, both the fully-opened sealing ring sealing surface 61 and the fully-closed sealing ring sealing surface 51 are cambered surfaces and are on the same spherical surface, the fully-opened sealing ring outer wall surface 63 is a cylindrical surface coaxial with the fully-opened sealing ring 6, the fully-closed sealing ring outer wall surface 53 is a cylindrical surface coaxial with the fully-closed sealing ring 5, the fully-open sealing ring 6 is used for cutting off the communication between the upstream valve seat channel 41 and/or the downstream valve seat channel 42 and the valve cavity 31 when the ball valve is fully opened, the fully-closed sealing ring 5 and the cutting surface 11 are matched and used for cutting off the communication between the upstream valve seat channel 41 and the downstream valve seat channel 42 when the ball valve is fully closed, the middle parts of the upper side and the lower side of the ball core body 1 respectively extend outwards to form support shafts 7, the support shafts 7 on the two sides of the ball core body 1 are used as a rotating shaft of the ball core body 1, the support shafts 7 are perpendicular to the axial line of the fully-open sealing ring 6 and the plane where the axial line of the fully-closed sealing ring 5 is located, the support shafts 7 on the two sides of the ball core body 1 are respectively in rotating connection with the upper side and the lower side of the valve cavity 31.

The fully-opened sealing ring 6, the fully-closed sealing ring 5 and the ball core body 1 can be integrally formed, and the fully-opened sealing ring 6 and the fully-closed sealing ring 5 can also be fixedly connected to the surface of the ball core body 1 in a welding mode.

The fully-opened sealing ring 6 and the fully-closed sealing ring 5 protrude out of the surface of the ball core body 1, when the ball valve is fully opened, the valve cavity 31 is separated by the cooperation of the fully-opened sealing ring 6 and the valve seat sealing surface 43, when the ball valve is fully closed, the upstream valve seat 4 flow passage and the downstream valve seat 4 flow passage are separated by the cooperation of the fully-closed sealing ring 5 and the separating surface 11 and the valve seat sealing surface 43, when the ball valve is in a partially opened state, a part of materials flow from the upstream valve seat passage 41 to the downstream valve seat passage 42 through the valve cavity 31 and the surface of the ball core body 1, at the moment, the materials in the valve cavity 31 are in a flowing state, the flowing materials automatically clean the valve cavity 31, the materials cannot be deposited in the valve cavity 31 for a long time, and when the ball valve is in a partially opened state, a plurality of material flowing passages are newly added between the surface of the ball core body 1 and, the erosion of the material to the valve seat 4 and the toroidal ball core is reduced; when the toroidal ball core rotates, the valve seat sealing surface 43 only generates friction with the fully-opened sealing ring sealing surface 61 and the fully-closed sealing ring sealing surface 51, compared with the existing ball valve, the friction area and the relative distance of friction are greatly reduced, and the abrasion to the valve seat sealing surface 43 is greatly reduced; meanwhile, the outer wall surface 63 of the fully-opened sealing ring and the outer wall surface 53 of the fully-closed sealing ring are cylindrical surfaces which are coaxial with the outer wall surfaces, the inner wall surface of the fully-opened sealing surface and the inner wall surface 52 of the fully-closed sealing ring are planes which are vertical to the respective axes of the fully-opened sealing surface and the fully-closed sealing ring, the fully-opened sealing ring 6 and the fully-closed sealing ring 5 are high in strength, difficult to deform, safe, reliable, convenient to process and low in cost, and the ball valve with the toroidal ball.

As a further solution of the above-mentioned toroidal spherical core embodiment, the partition surface 11 is a convex spherical surface, and the distance from the convex spherical surface to the spherical center of the spherical surface where the fully-open sealing ring sealing surface 61 and the fully-closed sealing ring sealing surface 51 are located is smaller than the radius of the spherical surface where the fully-open sealing ring sealing surface 61 and the fully-closed sealing ring sealing surface 51 are located.

As a further scheme of the above-mentioned toroidal ball core, the surface of the ball core body 1 is partially provided with the plane part 13 between the fully-open sealing ring outer wall surface 63 and the fully-closed sealing ring outer wall surface 53, the plane part 13 is parallel to the plane where the axis of the fully-open sealing ring 6 and the axis of the fully-closed sealing ring 5 are located, the upper side and the lower side of the ball core body 1 are both provided with the plane part 13, the support shafts 7 at the two sides of the ball core body 1 are both formed by extending the center of the plane part 13 outwards, and the distance from the plane part 13 to the spherical center of the spherical surface where the fully-open sealing ring sealing surface 61 and the fully-closed sealing ring sealing surface 51 are located is smaller than the radius of.

As a further scheme of the embodiment of the toroidal ball core, the surface of the ball core body 1 between the outer wall surface 63 of the fully-opened sealing ring and the outer wall surface 53 of the fully-closed sealing ring is composed of a spherical surface part 12 and a plane part 13, the spherical surface part 12 and the convex spherical surface are on the same spherical surface, the spherical center of the spherical surface where the spherical surface part 12 and the convex spherical surface are located coincides with the spherical center of the spherical surface where the fully-opened sealing ring 61 and the fully-closed sealing ring 51 are located, the surface of the ball core body 1 except the fully-opened sealing ring 6, the fully-closed sealing ring 5, the plane part 13 and the channel opening is located on the same spherical surface, and the distance from each part of the surface of the ball core body 1 to the spherical center is smaller than the distance from the fully-opened sealing ring sealing surface 61 and.

Specifically, the full-open sealing ring 6 comprises a first sealing ring and a second sealing ring, the full-close sealing ring 5 comprises a third sealing ring and a fourth sealing ring, the axes of the first sealing ring and the second sealing ring are coincident, the first sealing ring and the second sealing ring are respectively arranged at the passage openings at two opposite sides of the ball core body 1, the passage openings at two opposite sides of the ball core body 1 are respectively arranged in the inner ring of the sealing surface of the first sealing ring and the inner ring of the sealing surface of the second sealing ring, the axes of the third sealing ring and the fourth sealing ring are coincident, the third sealing ring and the fourth sealing ring are respectively arranged at two opposite sides of the ball core body 1, the axis of the first sealing ring is perpendicular to and intersected with the axis of the third sealing ring, the first sealing ring, the third sealing ring, the second sealing ring and the fourth sealing ring are sequentially arranged along the circumference of the ball core body 1, the sealing surfaces of the first sealing ring, the second sealing ring, the third sealing, the supporting shaft 7 is perpendicular to the plane where the axis of the first sealing ring and the axis of the third sealing ring are located and penetrates through the spherical centers of the spherical surfaces where the sealing surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are located, the first sealing ring and the third sealing ring are matched with the outlet of the upstream valve seat channel 41, the second sealing ring and the fourth sealing ring are matched with the inlet of the downstream valve seat channel 42, the outer wall surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all cylindrical surfaces which are coaxial with the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring, and the inner wall surfaces of the first sealing ring, the second sealing ring, the third;

when the ball valve is fully opened, the first sealing ring separates the outlet of the upstream valve seat passage 41 from the valve cavity 31, and the second sealing ring separates the inlet of the downstream valve seat passage 42 from the valve cavity 31;

when the ball valve is fully closed, the third seal ring and the blocking surface 11 therein block the outlet of the upstream valve seat passage 41 from the valve chamber 31, and the fourth seal ring and the blocking surface 11 therein block the inlet of the downstream valve seat passage 42 from the valve chamber 31.

The utility model discloses a ball valve, including valve body 3, upper reaches disk seat passageway 41, lower reaches disk seat passageway 42 and foretell anchor ring ball core, 3 hollows of valve body, 3 intracavity hollows of valve body are valve pocket 31, the export of upper reaches disk seat passageway 41 and lower reaches disk seat passageway 42's the coaxial setting of entry and all communicate with valve pocket 31, anchor ring ball core is installed in valve pocket 31 and is rotated with valve body 3 through back shaft 7 and be connected, the export of upper reaches disk seat passageway 41 and the axis of lower reaches disk seat passageway 42's entry all pass the nodical and on the axis of the seal ring 6 of opening entirely and full cut-off seal ring 5 and the axis place plane of the seal ring 5 of opening entirely.

Still include valve rod 8, valve rod 8 passes behind the valve body 3 and is connected with the back shaft 7 transmission that the upside of ball core body 1 has valve rod spread groove 71, and valve rod 8 rotates with valve body 3 through sealing packing to be connected, back shaft 7 and the 8 clearance fit of valve rod, and the back shaft 7 of the upper and lower both sides of ball core body 1 rotates with both sides about valve body 3 respectively and is connected, and back shaft 7 accessible bearing is connected with valve body 3, and back shaft 7 also can be with the 3 clearance fit of valve body, and valve rod 8 is not in valve pocket 31.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims (8)

1. A toroidal core, comprising: including ball core body (1), full open sealing ring (6), full cut-off sealing ring (5) and back shaft (7), rotatable the installing in valve pocket (31) of ball core body (1), ball core body (1) has material passageway (2), material passageway (2) run through ball core body (1) and ball core body (1) surface forms the passway, full open sealing ring (6) and full cut-off sealing ring (5) all set up in the surface of ball core body (1) and the both all outwards bulge, full open sealing ring (6) have full open sealing ring sealing face (61), full open sealing ring internal face (62) and full cut-off sealing ring outer wall face (63), full cut-off sealing ring (5) have full cut-off sealing ring sealing face (51), full cut-off sealing ring internal face (52) and full cut-off sealing ring outer wall face (53), the fully-open sealing ring (6) is arranged at the channel opening and the channel opening is arranged in an inner ring of a sealing surface (61) of the fully-open sealing ring, the fully-open sealing ring (6) is coaxial with the material channel (2), the axis of the fully-closed sealing ring (5) is perpendicular to and intersected with the axis of the fully-open sealing ring (6), the surface of the ball core body (1) in the inner ring of the sealing surface (51) of the fully-closed sealing ring is a partition surface (11), the sealing surface (61) of the fully-open sealing ring and the sealing surface (51) of the fully-closed sealing ring are both cambered surfaces and are on the same spherical surface, the outer wall surface (63) of the fully-open sealing ring is a cylindrical surface coaxial with the fully-open sealing ring (6), the outer wall surface (53) of the fully-closed sealing ring is a cylindrical surface coaxial with the fully-closed sealing ring (5), the inner wall surface (62) of the fully-open sealing ring is a plane and is, the inner wall surface (52) of the fully-closed sealing ring is a plane and is vertical to the axis of the fully-closed sealing ring (5), the fully-opened sealing ring (6) is used for blocking the communication between an upstream valve seat channel (41) and/or a downstream valve seat channel (42) and the valve cavity (31) when the ball valve is fully opened, the fully-closed sealing ring (5) and the blocking surface (11) are matched and used for blocking the communication between the upstream valve seat channel (41) and the downstream valve seat channel (42) when the ball valve is fully closed, the middle parts of two opposite sides of the ball core body (1) extend outwards respectively to form the supporting shafts (7), the supporting shafts (7) on two sides of the ball core body (1) are used as rotating shafts of the ball core body (1), and the plane where the axis of the fully-opened sealing ring (6) and the axis of the fully-closed sealing ring (5) are located is vertical to the supporting shafts (7, one of the support shafts (7) has a stem coupling groove (71).

2. The toroidal core of claim 1, wherein: the partition surface (11) is an outward convex spherical surface, and the distance from the outward convex spherical surface to the spherical center of the spherical surface where the fully-opened sealing ring sealing surface (61) and the fully-closed sealing ring sealing surface (51) are located is smaller than the radius of the spherical surface where the fully-opened sealing ring sealing surface (61) and the fully-closed sealing ring sealing surface (51) are located.

3. The toroidal core of claim 2, wherein: the spherical core comprises a spherical core body (1), wherein a plane part (13) is arranged on the surface of the spherical core body between a full-open sealing ring outer wall surface (63) and a full-closed sealing ring outer wall surface (53), the plane part (13) is parallel to the plane where the axis of a full-open sealing ring (6) and the axis of a full-closed sealing ring (5) are located, the plane part (13) is arranged on each of two opposite sides of the spherical core body (1), the support shafts (7) on the two sides of the spherical core body (1) are formed by outwards extending the center of the plane part (13), and the distance from the plane part (13) to the spherical centers of the spherical surfaces where the full-open sealing ring sealing surface (61) and the full-closed sealing ring sealing surface (51) are located is smaller than the radius of the spherical surfaces where the full-open sealing ring sealing surface (61) and the.

4. The toroidal core of claim 3, wherein: the surface of the ball core body (1) between the fully-opened sealing ring outer wall surface (63) and the fully-closed sealing ring outer wall surface (53) is composed of a spherical surface part (12) and a plane part (13), the spherical surface part (12) and the convex spherical surface are on the same spherical surface, and the spherical center of the spherical surface where the spherical surface part (12) and the convex spherical surface are located is superposed with the spherical center of the spherical surface where the fully-opened sealing ring sealing surface (61) and the fully-closed sealing ring sealing surface (51) are located.

5. The toroidal core of claim 1, wherein: the channel opening is a round opening, and the front and the back of the material channel (2) are equal in diameter.

6. The toroidal core according to any one of claims 1 to 5, wherein: the full-open sealing ring (6) comprises a first sealing ring and a second sealing ring, the full-closed sealing ring (5) comprises a third sealing ring and a fourth sealing ring, the axes of the first sealing ring and the second sealing ring are overlapped, the first sealing ring and the second sealing ring are respectively arranged at the passage openings at two opposite sides of the ball core body (1), the passage openings at two opposite sides of the ball core body (1) are respectively arranged in the inner ring of the sealing surface of the first sealing ring and the inner ring of the sealing surface of the second sealing ring, the axes of the third sealing ring and the fourth sealing ring are overlapped, the third sealing ring and the fourth sealing ring are respectively arranged at two opposite sides of the ball core body (1), the axis of the first sealing ring is vertical to and intersected with the axis of the third sealing ring, and the first sealing ring, the third sealing ring and the fourth sealing ring are respectively arranged at two opposite sides of the ball core body (1, The second sealing ring and the fourth sealing ring are sequentially arranged along the circumference of the ball core body (1), sealing surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are cambered surfaces and are on the same spherical surface, the support shaft (7) is perpendicular to the plane where the axis of the first sealing ring and the axis of the third sealing ring are located and penetrates through the spherical centers of the spherical surfaces where the sealing surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are located, the first sealing ring and the third sealing ring are matched with an outlet of the upstream valve seat channel (41), the second sealing ring and the fourth sealing ring are matched with an inlet of the downstream valve seat channel (42), and outer wall surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are cylindrical surfaces which are coaxial with the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring respectively, the inner wall surfaces of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all planes which are vertical to the respective axes;

when the ball valve is fully opened, the first sealing ring separates an outlet of the upstream valve seat passage (41) from the valve cavity (31), and the second sealing ring separates an inlet of the downstream valve seat passage (42) from the valve cavity (31);

when the ball valve is completely closed, the third sealing ring and the blocking surface (11) therein block the outlet of the upstream valve seat passage (41) from the valve cavity (31), and the fourth sealing ring and the blocking surface (11) therein block the inlet of the downstream valve seat passage (42) from the valve cavity (31).

7. A ball valve, characterized in that: comprising a valve body (3), an upstream seat channel (41), a downstream seat channel (42) and a toroidal core according to any one of claims 1 to 6, the valve body (3) is hollow, the hollow part of the inner cavity of the valve body (3) is the valve cavity (31), the outlet of the upstream valve seat passage (41) and the inlet of the downstream valve seat passage (42) are coaxially arranged and are communicated with the valve cavity (31), the toroidal ball core is arranged in the valve cavity (31) and is rotationally connected with the valve body (3) through the supporting shaft (7), the axes of the outlet of the upstream valve seat channel (41) and the inlet of the downstream valve seat channel (42) both pass through the intersection point of the axis of the fully-opened sealing ring (6) and the axis of the fully-closed sealing ring (5) and are on the plane of the axis of the fully-opened sealing ring (6) and the axis of the fully-closed sealing ring (5).

8. The ball valve according to claim 7, wherein: still include valve rod (8), valve rod (8) pass behind valve body (3) with have valve rod spread groove (71) back shaft (7) transmission is connected, valve rod (8) through sealing packing with valve body (3) rotate and are connected, back shaft (7) with valve rod (8) clearance fit.

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