High-sealing-performance ball valve

Abstract

The utility model discloses a ball valve with high sealing performance, which relates to the technical field of valves and comprises a valve body and a spherical valve core, a rotating cavity for the spherical valve core to rotate is arranged in the valve body, a valve rod and the spherical valve core are arranged in the rotating cavity, valve seats are arranged at two ends of the spherical valve core, and a first sealing body and a second sealing body are arranged on one side, close to the spherical valve core, of each valve seat. The first sealing body and the second sealing body can elastically deform and tightly abut against the inner wall of the spherical valve element and the inner wall of the valve body, the double-sealing effect is achieved, a plurality of elastic pieces are arranged between the valve body and the valve seat, the elastic force of the elastic pieces generates thrust on the valve seat, the valve seat is attached to the spherical valve element, the gap between the valve seat and the spherical valve element is reduced, and the sealing effect is improved. The purpose of compensation sealing can be achieved after the sealing body is abraded, the sealing performance of the ball valve is improved through the combination of double sealing and compensation sealing, and the service life of the ball valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-sealing ball valve. Background Art

[0002] Ball valves are widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipal administration, steel and other industries, and they play an important role in the national economy. They have the characteristics of compact structure, reliable sealing, simple structure, and convenient maintenance. The sealing surface and the spherical surface are often in a closed state, not easily eroded by the medium, easy to operate and maintain, and suitable for general working media such as water, solvents, acids and natural gas, and also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene.

[0003] However, no matter whether the current ball valve uses a single style or a combination style of valve seat, the sealing between the valve seat, the valve core and the valve body may be loose due to various factors such as the rotation wear of the valve core and the impact of the medium flowing in the valve body on the valve core. In addition, some seals are set too tightly, which increases the torque of the rotating valve core and increases the energy consumption of opening and closing the ball valve. In addition, there is no sealing compensation, and it generally needs to be adjusted after a period of use. Therefore, how to solve the problem of poor sealing performance of ball valves in the prior art has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0004] The utility model aims to overcome the shortcomings and deficiencies of the prior art and to provide a high-sealing ball valve.

[0005] The technical solution adopted by the utility model is as follows: a high-sealing ball valve, comprising a valve body and a spherical valve core, wherein a rotating chamber for the spherical valve core to rotate is provided in the valve body, a valve stem and a spherical valve core are provided in the rotating chamber, one end of the valve stem is plugged with the spherical valve core, and the other end extends out of the valve body and is connected to a driving device;

[0006] The spherical valve core is provided with valve seats at both ends, and a sealing component is provided on the side of the valve seat close to the spherical valve core, the sealing component includes a first sealing body and a second sealing body, and the valve seat is provided with a first sealing installation groove and a second sealing installation groove respectively matched with the first sealing body and the second sealing body, the first sealing body includes a first elastic sealing part and a first supporting part made of a rigid material, the first elastic sealing part is integrally injection-molded and wrapped around the outside of the first supporting part, the second sealing body includes a second elastic sealing part and a second supporting part made of a rigid material, the second supporting part is fixed on the valve seat and protrudes relative to the valve seat, one end of the second elastic sealing part is wrapped around the outside of the protruding part of the second supporting part relative to the valve seat, and the other end is in abutment and sealing cooperation with the spherical valve core;

[0007] The valve body is provided with a plurality of cavities on the inner wall near the valve seat, the valve seat is provided with a plurality of blind holes corresponding to the cavities, an elastic member is provided in the cavity, one end of the elastic member is installed in the cavity and axially abuts the valve body, and the other end extends out of the cavity, is installed in the blind hole and axially abuts the valve seat.

[0008] Preferably, the first sealing installation groove is arranged on the outer periphery of the valve seat close to the spherical valve core, and the outer peripheral surface of the first sealing body is in sealing cooperation with the inner wall of the valve body;

[0009] The second sealing installation groove is arranged on the inner periphery of the valve seat on one side close to the spherical valve core.

[0010] Preferably, the outer ring portion of the end surface of one side of the first support portion close to the elastic member is raised to form a limiting ring, a limiting groove is formed in the first sealing installation groove corresponding to the limiting ring, and the first elastic sealing portion on the outer periphery of the limiting ring is interference fit with the limiting groove.

[0011] Preferably, the first elastic sealing portion includes a first sealing protrusion and a second sealing protrusion. The first sealing protrusion is located on the end surface of the first sealing body close to the spherical valve core and abuts against the spherical valve core. The second sealing protrusion is located on the outer periphery of the first sealing body and abuts against the inner wall of the valve body. The first sealing protrusion and the second sealing protrusion each include at least two arc-shaped sealing surfaces.

[0012] Preferably, the end surface of the first supporting portion close to the spherical valve core is respectively provided with at least two tip protrusions corresponding to the first sealing protrusion, and the tip protrusions respectively form a supporting and abutting force on the first sealing protrusion.

[0013] Preferably, the second elastic sealing portion includes a sealing bevel wrapped around the outside of the raised portion of the second support portion relative to the valve seat and a sealing lip expanding outward along the axial direction, the sealing bevel tightly abuts against the spherical valve core, one end of the sealing lip tightly abuts against the spherical valve core, and the other end tightly abuts against the valve seat, and there is a deformation gap between the sealing bevel and the sealing lip.

[0014] Preferably, the valve seat is provided with a plurality of first annular seals and mounting grooves matched with the first annular seals at intervals along the flow direction of the medium of the valve body, and the first annular seals are in contact with the inner wall of the valve body.

[0015] Preferably, an elastic sealing sleeve is disposed outside the elastic member, two ends of the elastic member abut against the inner wall of the elastic sealing sleeve, and the elastic sealing sleeve is adapted to the cavity.

[0016] Preferably, the valve stem extends out of the valve body at one end and passes through the upper cover and the connecting plate in sequence upward; the upper cover and the connecting plate are connected to the valve body by a plurality of fasteners; a sealing filler is provided between the connecting plate and the upper cover; a sealing gasket is provided between the upper cover and the valve body; and a plurality of second annular seals are provided between the valve stem and the upper cover and the connecting plate.

[0017] Preferably, the valve body comprises a left valve body, an intermediate body and a right valve body, a valve body sealing ring is provided between the left valve body, the intermediate body and the right valve body, and the left valve body, the intermediate body and the right valve body are fixedly connected by fasteners.

[0018] The beneficial effects of the utility model are as follows: a first sealing body and a second sealing body are provided in the sealing installation groove on the valve seat close to the spherical valve core side, the first sealing body and the second sealing body can undergo elastic deformation and tightly abut against the spherical valve core and the inner wall of the valve body, thereby achieving a double sealing effect, and a thrust is generated on the valve seat through the elastic force of a number of elastic parts between the valve seat and the valve body, so that the valve seat fits against the spherical valve core, reducing the gap between the valve seat and the spherical valve core, and achieving the purpose of compensatory sealing after the sealing body is worn. The combination of double sealing and compensatory sealing improves the sealing performance of the ball valve and increases the service life of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0020] Figure 1 This is a cross-sectional schematic diagram of a high-sealing ball valve of this embodiment;

[0021] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0022] In the figure, 1-valve body, 101-left valve body, 102-intermediate body, 103-right valve body, 2-spherical valve core, 3-valve stem, 4-valve seat, 5-first sealing body, 501-first elastic sealing part, 5011-first sealing protrusion, 5012-second sealing protrusion, 502-first supporting part, 5021-limiting ring, 5022-tip protrusion, 6-second sealing body, 601-second elastic sealing part, 6011-sealing slope, 6012-sealing lip, 6013-deformation gap, 602-second supporting part, 7-first sealing installation groove, 8-second sealing installation groove, 9-cavity, 10-blind hole, 11-elastic part, 12-first annular seal, 13-elastic sealing sleeve, 14-upper cover, 15-connecting plate, 16-sealing packing, 17-sealing gasket, 18-second annular seal, 19-valve body sealing ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0024] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0025] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0026] like Figure 1 to Figure 2 As shown, in one embodiment of the utility model, a high sealing ball valve comprises a valve body 1 and a spherical valve core 2, a rotating chamber for the spherical valve core 2 to rotate is provided in the valve body 1, a valve stem 3 and the spherical valve core 2 are provided in the rotating chamber, one end of the valve stem 3 is plugged with the spherical valve core 2, and the other end extends out of the valve body 1 and is connected to a driving device;

[0027] Valve seats 4 are provided at both ends of the spherical valve core 2, and a sealing component is provided on the side of the valve seat 4 close to the spherical valve core 2, the sealing component includes a first sealing body 5 and a second sealing body 6, and the valve seat is provided with a first sealing installation groove 7 and a second sealing installation groove 8 respectively matched with the first sealing body 5 and the second sealing body 6, the first sealing body 5 includes a first elastic sealing part 501 and a first supporting part 502 made of a rigid material, the first elastic sealing part 501 is integrally injection-molded and wrapped around the outside of the first supporting part 502, the second sealing body 6 includes a second elastic sealing part 601 and a second supporting part 602 made of a rigid material, the second supporting part 602 is fixed on the valve seat 4 and protrudes relative to the valve seat 4, one end of the second elastic sealing part 601 is wrapped around the outside of the protruding part of the second supporting part 602 relative to the valve seat 4, and the other end is abutted and sealed with the spherical valve core 2;

[0028] A plurality of cavities 9 are provided on the inner wall of the valve body 1 near the valve seat 4, and a plurality of blind holes 10 are provided on the valve seat 4 corresponding to the cavities 9. An elastic member 11 is provided in the cavity 9. One end of the elastic member 11 is installed in the cavity 9 and axially abuts against the valve body 1, and the other end extends out of the cavity 9, is installed in the blind hole 10 and axially abuts against the valve seat 4.

[0029] It can be understood that the first sealing installation groove 7 and the second sealing installation groove 8 provide a limiting and supporting function for the first sealing body 5 and the second sealing body 6. The outer periphery of the first sealing body 5 is wrapped with an elastic sealing part, which forms a reliable seal with the spherical valve core 2 and the inner wall of the valve body 1. A rigid support member is provided inside to support the elastic sealing part to prevent the elastic sealing part from being excessively deformed and causing sealing failure. The second support portion 602 connects the second elastic sealing part 601 with the valve seat 4, provides a supporting force, and at the same time protrudes from the outer part of the valve seat 4 so that the second elastic sealing part 601 is not easy to deform. Through the elastic deformation of the first sealing body 5 and the second sealing body 6 and the close contact with the valve seat 4 and the inner wall of the valve body 1, a double sealing effect can be achieved. The elastic force of the several elastic members 11 arranged between the valve seat 4 and the valve body 1 generates a thrust on the valve seat 4, so that the valve seat 4 fits the spherical valve core 2, reduces the gap between the valve seat 4 and the spherical valve core 2, achieves the purpose of compensating the seal, improves the sealing of the ball valve, and increases the service life of the ball valve. The elastic member 11 is installed in the cavity 9 and the blind hole 10, and the cavity 9 and the blind hole 10 limit the elastic member 11, prevent the elastic member 11 from displacement or twisting, and are not easy to be damaged, thereby ensuring the stability of the elastic member 11. The elastic member 11 is a part with elastic reset function, such as a metal spring, an airbag spring, etc.

[0030] In a preferred embodiment, the first sealing installation groove 7 is arranged on the outer periphery of the valve seat 4 close to the spherical valve core 2, the outer peripheral surface of the first sealing body 5 is sealed with the inner wall of the valve body 1, and the second sealing installation groove 8 is arranged on the inner periphery of the valve seat 4 close to the spherical valve core 2. In this way, the spherical valve core 2 is provided with a sealing component on the side close to the valve seat 4, which increases the sealing performance of the ball valve, and the outer peripheral surface of the first sealing body 5 is sealed with the inner wall of the valve body 1, so that the inner wall of the valve body 1 and the spherical valve core 2 and the valve seat 4 are also effectively sealed.

[0031] In a preferred embodiment, the outer ring portion of the end surface of one side of the first support portion 502 close to the elastic member 11 is raised to form a limit ring 5021, and a limit groove is formed in the first sealing installation groove 7 corresponding to the limit ring 5021, and the first elastic sealing portion 501 on the outer periphery of the limit ring 5021 is interference-fitted with the limit groove. In this way, the contact area between the first elastic sealing portion 501 and the inner wall of the valve body 1 and the valve seat 4 is increased, and a better extrusion deformation sealing effect is formed between the first elastic sealing portion 501 and the inner wall of the valve body 1 and the valve seat 4, and the partial interference fit of the limit ring 5021 is more convenient for installation than the interference fit of the entire first sealing body 5.

[0032] In a preferred embodiment, the first elastic sealing portion 501 includes a first sealing protrusion 5011 and a second sealing protrusion 5012. The first sealing protrusion 5011 is located on the end surface of the first sealing body 5 close to the spherical valve core 2 and abuts against the spherical valve core 2. The second sealing protrusion 5012 is located on the outer periphery of the first sealing body 5 and abuts against the inner wall of the valve body 1. The first sealing protrusion 5011 and the second sealing protrusion 5012 each include at least two arc-shaped sealing surfaces.

[0033] Through the above arrangement, due to the rotation of the spherical valve core 2, the impact of the medium flow in the valve body 1 and other reasons, the spherical valve core 2 will generate a squeezing force to the surroundings, and the elastic seal can be deformed after being subjected to the force, which not only reduces the wear of the spherical valve core 2 but also allows the spherical valve core 2 to fit tightly with the valve body 1. The setting of the arc sealing surface of the sealing protrusion reduces the contact area between the first sealing body 5 and the spherical valve core 2 and the inner wall of the valve body 1, thereby reducing the friction resistance and reducing the torque when the ball valve is opened and closed, making it easier to open and close the ball valve. At the same time, the gap between the arc surfaces also provides more deformation space for the elastic deformation of the first sealing body 5, avoiding excessive pressing force between the spherical valve core 2 and the valve body 1 and the first sealing body 5, and further reducing the torque when the ball valve is opened and closed.

[0034] In a preferred embodiment, the end surface of the first support portion 502 close to the spherical valve core 2 is respectively provided with at least two pointed protrusions 5022 corresponding to the first sealing protrusion 5011, and the pointed protrusions 5022 respectively form a supporting and abutting force on the first sealing protrusion 5011. In this embodiment, the first support portion 502 is made of a rigid material and is relatively hard. When impacted by a high-pressure medium, since the first support portion 502 is embedded in the first elastic sealing portion 501, the stability of the first sealing body 5 is improved, the first elastic sealing portion 501 is prevented from being deformed or shifted, and the sealing stability of the ball valve is ensured. At the same time, the pointed protrusion 5022 of the first support portion 502 is directly opposite to the first sealing protrusion 5011, so that the protruding part of the first elastic sealing portion 501 is also strongly supported, ensuring the uniform stability of the first sealing body 5 as a whole.

[0035] In a preferred embodiment, the second elastic sealing portion 601 includes a sealing bevel 6011 wrapped around the outside of the raised portion of the second support portion 602 relative to the valve seat 4 and a sealing lip 6012 expanding outward along the axial direction. The sealing bevel 6011 is tightly abutted against the spherical valve core 2, one end of the sealing lip 6012 is tightly abutted against the spherical valve core 2, and the other end is tightly abutted against the valve seat 4. A deformation gap 6013 exists between the sealing bevel 6011 and the sealing lip 6012.

[0036] It can be understood that the setting of the sealing bevel 6011 increases the contact area between the second sealing body 6 and the spherical valve core 2, thereby enhancing the clamping force between the second sealing body 6 and the spherical valve core 2, while the setting of the sealing lip 6012 reduces the contact area between the second sealing body 6 and the spherical valve core 2, thereby reducing the clamping force between the second sealing body 6 and the spherical valve core 2. During the use of the ball valve, the spherical valve core 2 will move to the surroundings and generate pressure on the valve seat. The lip structure of the sealing lip 6012 provides space for the longitudinal deformation of the second elastic sealing part 601. The sealing bevel 6011 and the sealing lip 6012 work together to make the clamping force between the second sealing body 6 and the spherical valve core 2 moderate. At the same time, the deformation gap 6013 between the sealing bevel 6011 and the sealing lip 6012 provides space for the deformation of the second elastic sealing part 601.

[0037] In a preferred embodiment, the valve seat 4 is provided with a plurality of first annular seals 12 and mounting grooves adapted to the first annular seals 12 at intervals along the medium flow direction of the valve body 1, and the first annular seals 12 abut against the inner wall of the valve body 1. Such an arrangement increases the sealing between the valve seat 4 and the valve body 1, effectively preventing the medium from entering the gap between the valve seat 4 and the valve body 1, and preventing the medium from getting stuck or damaging the elastic member 11.

[0038] In a preferred embodiment, an elastic sealing sleeve 13 is provided outside the elastic member 11, and both ends of the elastic member 11 abut against the inner wall of the elastic sealing sleeve 13, and the elastic sealing sleeve 13 is adapted to the cavity 9. It is understandable that the elastic member 11 will deform, and the elastic sealing sleeve 13 can deform with the elastic member 11 while protecting the elastic member 11, preventing the medium from entering the elastic member 11 and damaging the elastic member 11, and playing a double sealing role with the first annular seal 12 to ensure the sealing stability of the ball valve.

[0039] In a preferred embodiment, the valve stem 3 extends out of one end of the valve body 1 and passes through the upper cover 14 and the connecting plate 15 in sequence. The upper cover 14 and the connecting plate 15 are connected to the valve body 1 through a number of fasteners. A sealing packing 16 is provided between the connecting plate 15 and the upper cover 14, a sealing gasket 17 is provided between the upper cover 14 and the valve body 1, and a number of second annular seals 18 are provided between the valve stem 3 and the upper cover 14 and the connecting plate 15. In this way, the upper cover 14, the connecting plate 15 and the valve body 1 are detachably connected. If the seals between the upper cover 14, the connecting plate 15 and the valve body 1 have gaps due to wear, the gaps can be reduced by tightening the fasteners without direct replacement, thereby increasing the service life of the seals. The sealing effect of the sealing packing is better than that of the sealing ring, and it is more suitable to be arranged between the connecting plate 15 and the upper cover 14. There are multiple seals between the valve body 1 and the valve stem 3 to prevent the medium from leaking from the valve stem 3.

[0040] In a preferred embodiment, the valve body 1 includes a left valve body 101, an intermediate body 102 and a right valve body 103, wherein a valve body sealing ring 19 is disposed between the left valve body 101, the intermediate body 102 and the right valve body 103, and the left valve body 101, the intermediate body 102 and the right valve body 103 are fixedly connected by fasteners. With such an arrangement, the valve body 1 is a detachable structure, and the valve body sealing ring 19 ensures the sealing of each connection of the valve body.

[0041] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A high sealing ball valve, comprising a valve body (1) and a spherical valve core (2), characterized in that: The valve body (1) is provided with a rotating chamber for the spherical valve core (2) to rotate, and the rotating chamber is provided with a valve stem (3) and a spherical valve core (2), one end of the valve stem (3) is plugged into and matched with the spherical valve core (2), and the other end extends out of the valve body (1) and is connected to a driving device; The spherical valve core (2) is provided with a valve seat (4) at both ends, and a sealing component is provided on the side of the valve seat (4) close to the spherical valve core (2), and the sealing component includes a first sealing body (5) and a second sealing body (6). The valve seat is provided with a first sealing installation groove (7) and a second sealing installation groove (8) respectively adapted to the first sealing body (5) and the second sealing body (6). The first sealing body (5) includes a first elastic sealing part (501) and a first supporting part (502) made of a rigid material, and the first elastic sealing part (501) is integrally injection-molded and wrapped around the outside of the first supporting part (502). The second sealing body (6) includes a second elastic sealing part (601) and a second supporting part (602) made of a rigid material, and the second supporting part (602) is fixed on the valve seat (4) and protrudes relative to the valve seat (4). One end of the second elastic sealing part (601) is wrapped around the outside of the protruding part of the second supporting part (602) relative to the valve seat (4) and the other end is in abutment and sealing cooperation with the spherical valve core (2); The valve body (1) is provided with a plurality of cavities (9) on the inner wall close to the valve seat (4); the valve seat (4) is provided with a plurality of blind holes (10) corresponding to the cavities (9); an elastic member (11) is provided in the cavity (9); one end of the elastic member (11) is installed in the cavity (9) and axially abuts against the valve body (1); the other end extends out of the cavity (9) and is installed in the blind hole (10) and axially abuts against the valve seat (4).

2. A high sealing ball valve according to claim 1, characterized in that: The first sealing installation groove (7) is arranged on the outer periphery of the valve seat (4) close to the spherical valve core (2), and the outer peripheral surface of the first sealing body (5) is sealingly matched with the inner wall of the valve body (1); The second sealing installation groove (8) is arranged on the inner periphery of the valve seat (4) on a side close to the spherical valve core (2).

3. A high sealing ball valve according to claim 2, characterized in that: The outer ring portion of the end surface of one side of the first support portion (502) close to the elastic member (11) is raised to form a limiting ring (5021), and a limiting groove is formed in the first sealing installation groove (7) corresponding to the limiting ring (5021), and the first elastic sealing portion (501) on the outer periphery of the limiting ring (5021) is interference fit with the limiting groove.

4. A high sealing ball valve according to claim 1, characterized in that: The first elastic sealing portion (501) comprises a first sealing protrusion (5011) and a second sealing protrusion (5012); the first sealing protrusion (5011) is located on the end surface of the first sealing body (5) close to the spherical valve core (2) and abuts against the spherical valve core (2); the second sealing protrusion (5012) is located on the outer periphery of the first sealing body (5) and abuts against the inner wall of the valve body (1); the first sealing protrusion (5011) and the second sealing protrusion (5012) each comprise at least two arc-shaped sealing surfaces.

5. A high sealing ball valve according to claim 3, characterized in that: The end surface of the first supporting portion (502) close to the spherical valve core (2) is respectively provided with at least two tip protrusions (5022) corresponding to the first sealing protrusion (5011), and the tip protrusions (5022) respectively form a supporting abutment force on the first sealing protrusion (5011).

6. A high sealing ball valve according to claim 1, characterized in that: The second elastic sealing portion (601) includes a sealing bevel (6011) wrapped around the outside of the raised portion of the second support portion (602) relative to the valve seat (4) and a sealing lip (6012) expanding outward along the axial direction, the sealing bevel (6011) is tightly abutted against the spherical valve core (2), one end of the sealing lip (6012) is tightly abutted against the spherical valve core (2), and the other end is tightly abutted against the valve seat (4), and a deformation gap (6013) exists between the sealing bevel (6011) and the sealing lip (6012).

7. A high sealing ball valve according to claim 1, characterized in that: The valve seat (4) is provided with a plurality of first annular seals (12) and mounting grooves matched with the first annular seals (12) at intervals along the medium flow direction of the valve body (1), and the first annular seals (12) are in contact with the inner wall of the valve body (1).

8. A high sealing ball valve according to claim 1, characterized in that: An elastic sealing sleeve (13) is disposed outside the elastic member (11), two ends of the elastic member (11) abut against the inner wall of the elastic sealing sleeve (13), and the elastic sealing sleeve (13) is adapted to the cavity (9).

9. A high sealing ball valve according to claim 1, characterized in that: One end of the valve stem (3) extends out of the valve body (1) and passes through the upper cover (14) and the connecting plate (15) in sequence. The upper cover (14) and the connecting plate (15) are connected to the valve body (1) via a plurality of fasteners. A sealing filler (16) is provided between the connecting plate (15) and the upper cover (14). A sealing gasket (17) is provided between the upper cover (14) and the valve body (1). A plurality of second annular seals (18) are provided between the valve stem (3) and the upper cover (14) and the connecting plate (15).

10. A high sealing ball valve according to claim 1, characterized in that: The valve body (1) comprises a left valve body (101), an intermediate body (102) and a right valve body (103); a valve body sealing ring (19) is provided between the left valve body (101), the intermediate body (102) and the right valve body (103); and the left valve body (101), the intermediate body (102) and the right valve body (103) are fixedly connected by fasteners.

Images