A full-diameter flat-bottom eccentric hemispherical valve

Abstract

The utility model discloses a full-diameter flat-bottom eccentric semi-ball valve, comprising a valve body, a valve cover, a driving device, a valve stem, a ball, a ball crown and a valve seat; an annular protrusion is provided on the end face of the ball, the ball crown is connected to the outer periphery of the annular protrusion through a plurality of locking components, and the end face of the ball crown is tightly abutted against the end face of the ball; the locking component comprises a locking block, a spring and a pressure cover, the locking block comprises a guide part and a locking part, the inner periphery of the annular protrusion is provided with a plurality of circular holes, the inner end of each circular hole is provided with a square hole, the guide part of the locking block is slidably arranged in the corresponding circular hole, the locking part of the locking block is slidably arranged in the square hole, the pressure cover is threadedly connected to one end of the circular hole, the spring clip is arranged between the pressure cover and the locking block, the inner periphery of the ball crown is provided with a plurality of locking grooves, and when the ball crown is sleeved on the outer periphery of the annular flange, the locking part is inserted into the corresponding locking groove. The utility model is conducive to the installation of the ball crown, has good installation stability, and can ensure that the sealing surface of the ball crown and the sealing surface of the valve seat fit perfectly when the valve is closed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a full-diameter flat-bottom eccentric hemispherical valve. Background Art

[0002] Ball valves are widely used in fluid control. In fluid control applications, ball valves are mainly used in pipelines to open, close, distribute the flow of fluid media, change the flow direction and flow rate of fluid media, etc.

[0003] The utility model patent with the patent publication number CN211738086U discloses a full-diameter top-mounted flat-bottom eccentric semi-ball valve, which includes a valve body, a valve seat, a ball, a valve stem, a valve cover and a transmission device. The valve seat is installed in the outlet channel of the valve body, the ball adopts a semi-sphere, and the ball and valve seat adopt a top-mounted structure; the center line of the valve stem is perpendicular to the center line of the valve body channel and the center line of the valve cover, and the ball crown is fixedly installed on the semi-sphere by screws, and the ball crown has a sealing surface that cooperates with the valve seat; the bottom of the valve body adopts a flat-bottom inner cavity. The semi-sphere of the top-mounted flat-bottom eccentric semi-ball valve is fixedly installed with a ball crown by screws, and the operation of hand-tightening the screws, the screwing depths of multiple screws arranged circumferentially are inconsistent, which easily causes the ball crown to tilt slightly, resulting in the sealing surface of the ball crown and the sealing surface of the valve seat not being perfectly fitted when the valve is closed, which not only affects the sealing performance of the valve, but also reduces the service life of the valve. Utility Model Content

[0004] The purpose of the utility model is to provide a full-diameter flat-bottom eccentric semi-ball valve. The utility model is conducive to the installation of the ball crown and has good installation stability. It can ensure that the sealing surface of the ball crown and the sealing surface of the valve seat fit perfectly when the valve is closed, so that the sealing performance and service life of the valve are significantly improved.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a full-diameter flat-bottom eccentric semi-ball valve, comprising a valve body, a valve cover, a driving device, a valve stem, a ball, a ball crown and a valve seat, wherein the valve cover is mounted on the upper part of the valve body, the valve stem penetrates the valve body, the output end of the driving device is linked to the valve stem for driving the valve stem to rotate, the inner end of the valve stem is linked to the ball arranged in the valve body, the ball crown is mounted on the ball, and the valve seat is mounted inside the valve body for forming a sealing fit with the ball crown when the valve is closed; an annular protrusion is provided on the end face of the ball, the ball crown is connected to the outer periphery of the annular protrusion through a plurality of locking components, and the end face of the ball crown is tightly pressed against the end face of the ball; the locking components The component includes a locking block, a spring and a pressure cover, the locking block includes a guide portion with a circular cross-section and a locking portion with a square cross-section, the inner circumference of the annular protrusion is provided with a plurality of circular holes whose number is equivalent to the locking component, the inner end of each circular hole is provided with a square hole extending to the outer circumference of the annular protrusion, the guide portion of the locking block is slidably set in the corresponding circular hole, the locking portion of the locking block is slidably set in the square hole, the pressure cover is threadedly connected to one end of the circular hole away from the square hole, and the spring is clamped between the pressure cover and the locking block, the inner circumference of the ball crown is provided with a plurality of locking grooves whose number is equivalent to the locking component, and when the ball crown is mounted on the outer circumference of the annular flange, the locking portion of the locking block is inserted into the corresponding locking groove.

[0006] By adopting the above technical scheme, compared with the existing spherical crown adopting axial locking connection, the present application adopts radial locking connection to install the spherical crown on the sphere, and the installation position of the locking assembly is pre-set. There will be no situation where the axial positions of multiple connection parts of the spherical crown are different during installation, and there will be no situation where the spherical crown is partially tilted due to loosening of screws during use. It has the advantages of easy installation and good stability of the installation structure, and can ensure that the sealing surface of the spherical crown fits perfectly with the sealing surface of the valve seat when the valve is closed, so that the sealing and service life of the valve are significantly improved.

[0007] The utility model is further configured that an end of the locking portion away from the guide portion is provided with a guide slope, and an end of the spherical crown close to the sphere is provided with a guide cone matching the guide slope.

[0008] By adopting the above technical solution, when installing the ball crown, the guiding inclined surface cooperates with the guiding conical surface to form a guiding structure, which prompts the locking block to retract inwards, thereby facilitating the installation of the ball crown.

[0009] The utility model is further configured that a plurality of positioning protrusions are provided on one end of the sphere close to the spherical crown, and a plurality of positioning recesses matching with the positioning protrusions are provided on the spherical crown.

[0010] By adopting the above technical solution, through the positioning structure between the sphere and the spherical crown, when installing the spherical crown, the locking portion of the locking block can be accurately inserted into the locking groove of the spherical crown, which is more conducive to the installation operation.

[0011] The utility model is further configured that the inner end of the pressure cover is provided with a first positioning groove, the end of the locking block close to the pressure cover is provided with a second positioning groove, one end of the spring is embedded in the first positioning groove, and the other end of the spring is embedded in the second positioning groove.

[0012] By adopting the above technical solution, both ends of the spring can be positioned to ensure the stability of the spring installation and movement process.

[0013] The utility model is further configured that the outer end of the pressure cover is provided with a straight-shaped dial button.

[0014] By adopting the above technical solution, the pressure cover can be rotated by a straight-shaped dial button, which is convenient for disassembly and assembly of the pressure cover.

[0015] The utility model is further configured that the outer end of the gland is provided with an inner hexagonal groove.

[0016] By adopting the above technical solution, when it is impossible to manually turn the straight-shaped button to rotate the gland, the gland can be rotated by inserting a hexagonal wrench into the inner hexagonal slot, thereby ensuring that the gland can be removed smoothly.

[0017] The utility model is further configured that a first sealing ring for forming a sealing fit with the sphere is installed at one end of the spherical cap close to the sphere.

[0018] By adopting the above technical solution, the sealing between the spherical crown and the spherical body can be ensured, thereby preventing the upstream medium from leaking to the downstream through the gap between the two when the valve is closed.

[0019] The utility model is further configured that an annular mounting groove is provided on the inner wall of the valve body, the valve seat is embedded in the annular mounting groove, and a second sealing ring for sealingly cooperating with the annular mounting groove is installed on the outer periphery of the valve seat.

[0020] By adopting the above technical solution, it is not only easy to install but also has good sealing performance.

[0021] The utility model is further configured that a hard sealing layer is built-up on the sealing surface of the valve seat, and an annular groove is also provided on the sealing surface of the valve seat, in which a soft sealing ring is embedded, and when the valve is closed, the sealing surface of the ball crown is tightly pressed against the hard sealing layer and the soft sealing ring at the same time.

[0022] By adopting the above technical solution and a double-sealing valve seat structure, the sealing between the valve seat and the ball crown when the valve is closed can be significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0025] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0026] In the figure: 1. valve body; 2. valve cover; 3. driving device; 4. valve stem; 5. ball; 6. ball crown; 7. valve seat; 8. annular protrusion; 9. locking block; 10. spring; 11. pressure cover; 12. guide part; 13. locking part; 14. round hole; 15. square hole; 16. locking groove; 17. guide slope; 18. guide cone; 19. positioning protrusion; 20. positioning recess; 21. first positioning groove; 22. second positioning groove; 23. straight-shaped dial button; 24. hexagonal groove; 25. first sealing ring; 26. annular mounting groove; 27. second sealing ring; 28. hard sealing layer; 29. ​​annular groove; 30. soft sealing ring. DETAILED DESCRIPTION

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

[0028] Example: As attached Figures 1 to 3A full-bore flat-bottomed eccentric semi-ball valve shown in the figure comprises a valve body 1, a valve cover 2, a driving device 3, a valve stem 4, a ball 5, a ball crown 6 and a valve seat 7, wherein the valve cover 2 is mounted on the upper part of the valve body 1, the valve stem 4 penetrates the valve body 1, the output end of the driving device 3 is linked to the valve stem 4 for driving the valve stem 4 to rotate, the inner end of the valve stem 4 is linked to the ball 5 arranged in the valve body 1, the ball crown 6 is mounted on the ball 5, and the ball crown 6 is made of hard chrome alloy, and the valve seat 7 is mounted inside the valve body 1 for forming a sealing fit with the ball crown 6 when the valve is closed; an annular protrusion 8 is provided on the end face of the ball 5, the ball crown 6 is connected to the outer periphery of the annular protrusion 8 through a plurality of locking components, and the end face of the ball crown 6 is tightly pressed against the end face of the ball 5; the locking component comprises a locking block 9, a spring 10 and a pressure cover 11, the locking block 9 comprises a guide portion 12 with a circular cross section and a locking portion 13 with a square cross section, the guide portion 12 and The locking portion 13 is an integrated structure, and a limiting step is formed between the guide portion 12 and the locking portion 13. The inner circumference of the annular protrusion 8 is provided with a plurality of circular holes 14 whose number is equivalent to the locking assembly. The inner end of each circular hole 14 is provided with a square hole 15 extending to the outer circumference of the annular protrusion 8. The cross-section of the circular hole 14 is equivalent to the cross-section of the guide portion 12, and the cross-section of the square hole 15 is equivalent to the cross-section of the locking portion 13. The guide portion 12 of the locking block 9 is slidably arranged in the corresponding circular hole 14, and the locking portion 13 of the locking block 9 is slidably arranged in the square hole 15. The pressure cover 11 is threadedly connected to one end of the circular hole 14 away from the square hole 15, and the spring 10 is clamped between the pressure cover 11 and the locking block 9. The spring 10 provides a spring 10 force for the locking block 9. The inner circumference of the ball crown 6 is provided with a plurality of locking grooves 16 whose number is equivalent to the locking assembly. When the ball crown 6 is mounted on the outer circumference of the annular flange, the locking portion 13 of the locking block 9 is inserted into the corresponding locking groove 16. Compared with the existing spherical crown 6 which adopts an axial locking connection method, the present application adopts a radial locking connection method to install the spherical crown 6 on the sphere 5. The installation position of the locking assembly is pre-set. There will be no situation where the multiple connection parts of the spherical crown 6 have different axial positions during installation, and there will be no situation where the spherical crown 6 is partially tilted due to loosening of the screws during use. It has the advantages of easy installation and good stability of the installation structure, and can ensure that the sealing surface of the spherical crown 6 fits perfectly with the sealing surface of the valve seat 7 when the valve is closed, so that the sealing and service life of the valve are significantly improved.

[0029] As attached Figure 2 As shown, the end of the locking portion 13 away from the guide portion 12 is provided with a guide slope 17, and the end of the ball crown 6 close to the ball 5 is provided with a guide cone 18 that matches the guide slope 17. When installing the ball crown 6, the guide slope 17 and the guide cone 18 cooperate to form a guide structure, which prompts the locking block 9 to retract inward, which is beneficial to the installation of the ball crown 6.

[0030] As attached Figure 2 As shown, the end of the sphere 5 close to the spherical crown 6 is provided with a plurality of positioning protrusions 19, and the spherical crown 6 is provided with a plurality of positioning recesses 20 that fit with the positioning protrusions 19. Through the positioning structure between the sphere 5 and the spherical crown 6, when installing the spherical crown 6, the locking portion 13 of the locking block 9 can be accurately inserted into the locking groove 16 of the spherical crown 6, which is more conducive to the installation operation.

[0031] As attached Figure 2 As shown, the inner end of the gland 11 is provided with a first positioning groove 21, the end of the locking block 9 close to the gland 11 is provided with a second positioning groove 22, one end of the spring 10 is embedded in the first positioning groove 21, and the other end of the spring 10 is embedded in the second positioning groove 22. This design can position the two ends of the spring 10 to ensure the stability of the spring 10 during installation and movement.

[0032] As attached Figure 2 and attached Figure 3 As shown, a straight-shaped dial button 23 is provided at the outer end of the pressure cover 11. The pressure cover 11 can be rotated by the straight-shaped dial button 23, so that the pressure cover 11 can be easily disassembled and assembled.

[0033] As attached Figure 2 and attached Figure 3 As shown, the outer end of the gland 11 is provided with an inner hexagonal groove 24. When the straight-shaped knob 23 cannot be manually turned to rotate the gland 11, the gland 11 can be rotated by inserting a hexagonal wrench into the inner hexagonal groove 24, thereby ensuring that the gland 11 can be removed smoothly.

[0034] As attached Figure 2 As shown, the end of the spherical cap 6 close to the spherical body 5 is provided with a first sealing ring 25 for forming a sealing fit with the spherical body 5. This arrangement can ensure the sealing between the spherical cap 6 and the spherical body 5, and prevent the upstream medium from leaking to the downstream through the gap between the two when the valve is closed.

[0035] As attached Figure 2 As shown, an annular mounting groove 26 is provided on the inner wall of the valve body 1, the valve seat 7 is embedded in the annular mounting groove 26, and a second sealing ring 27 for sealing with the annular mounting groove 26 is installed on the outer periphery of the valve seat 7. This design is not only easy to install, but also has good sealing performance.

[0036] As attached Figure 2As shown, a hard sealing layer 28 is welded on the sealing surface of the valve seat 7, and the hard sealing layer 28 is made of D507 material. An annular groove 29 is also provided on the sealing surface of the valve seat 7, and a soft sealing ring 30 is embedded in the annular groove 29. The soft sealing ring 30 is made of RPTFEM material. When the valve is closed, the sealing surface of the ball crown 6 is tightly pressed against the hard sealing layer 28 and the soft sealing ring 30. The double-sealing valve seat 7 structure can significantly improve the sealing between the valve seat 7 and the ball crown 6 when the valve is closed.

[0037] In addition, a convex edge is provided at the outer edge of the soft sealing ring 30 extending in the axial direction, so as to facilitate the soft sealing ring 30 to be clamped and pulled out by a tool during the later replacement operation.

Claims

1. A full-diameter flat-bottom eccentric hemispherical valve, comprising a valve body (1), a valve cover (2), a driving device (3), a valve stem (4), a ball (5), a ball crown (6) and a valve seat (7), wherein the valve cover (2) is mounted on the upper part of the valve body (1), the valve stem (4) passes through the valve body (1), the output end of the driving device (3) is linked to the valve stem (4) for driving the valve stem (4) to rotate, the inner end of the valve stem (4) is linked to the ball (5) arranged in the valve body (1), the ball crown (6) is mounted on the ball (5), and the valve seat (7) is mounted inside the valve body (1) for forming a sealing fit with the ball crown (6) when the valve is closed; characterized in that: The end surface of the sphere (5) is provided with an annular protrusion (8), the spherical crown (6) is connected to the outer periphery of the annular protrusion (8) through a plurality of locking components, and the end surface of the spherical crown (6) is tightly abutted against the end surface of the sphere (5); the locking component comprises a locking block (9), a spring (10) and a pressure cover (11), the locking block (9) comprises a guide portion (12) with a circular cross section and a locking portion (13) with a square cross section, the inner periphery of the annular protrusion (8) is provided with a plurality of circular holes (14) whose number is equal to the number of the locking components, and the inner end of each circular hole (14) is provided with a square hole (15) extending to the outer periphery of the annular protrusion (8). ), the guide portion (12) of the locking block (9) is slidably arranged in the corresponding circular hole (14), the locking portion (13) of the locking block (9) is slidably arranged in the square hole (15), the pressure cover (11) is threadedly connected to the end of the circular hole (14) away from the square hole (15), and the spring (10) is clamped between the pressure cover (11) and the locking block (9), the inner periphery of the ball crown (6) is provided with a plurality of locking grooves (16) whose number is equivalent to that of the locking assembly, and when the ball crown (6) is mounted on the outer periphery of the annular flange, the locking portion (13) of the locking block (9) is inserted into the corresponding locking groove (16).

2. A full-diameter flat-bottom eccentric hemispherical valve according to claim 1, characterized in that: The locking portion (13) is provided with a guide slope (17) at one end away from the guide portion (12), and the spherical crown (6) is provided with a guide cone (18) matching the guide slope (17) at one end close to the spherical body (5).

3. A full-diameter flat-bottom eccentric hemispherical valve according to claim 2, characterized in that: A plurality of positioning protrusions (19) are provided at one end of the spherical body (5) close to the spherical crown (6), and a plurality of positioning recesses (20) matching with the positioning protrusions (19) are provided on the spherical crown (6).

4. A full-diameter flat-bottom eccentric hemispherical valve according to claim 1, characterized in that: The inner end of the pressure cover (11) is provided with a first positioning groove (21), the end of the locking block (9) close to the pressure cover (11) is provided with a second positioning groove (22), one end of the spring (10) is embedded in the first positioning groove (21), and the other end of the spring (10) is embedded in the second positioning groove (22).

5. The full-diameter flat-bottom eccentric hemispherical valve according to claim 1, characterized in that: The outer end of the pressure cover (11) is provided with a straight-shaped dial button (23).

6. A full-diameter flat-bottom eccentric hemispherical valve according to claim 5, characterized in that: The outer end of the gland (11) is provided with a hexagonal inner groove (24).

7. The full-diameter flat-bottom eccentric hemispherical valve according to claim 1, characterized in that: A first sealing ring (25) for forming a sealing fit with the spherical body (5) is installed at one end of the spherical cap (6) close to the spherical body (5).

8. The full-diameter flat-bottom eccentric hemispherical valve according to claim 1, characterized in that: An annular mounting groove (26) is provided on the inner wall of the valve body (1), the valve seat (7) is embedded in the annular mounting groove (26), and a second sealing ring (27) for forming a sealing fit with the annular mounting groove (26) is installed on the outer periphery of the valve seat (7).

9. The full-diameter flat-bottom eccentric hemispherical valve according to claim 1, characterized in that: A hard sealing layer (28) is welded on the sealing surface of the valve seat (7), and an annular groove (29) is also provided on the sealing surface of the valve seat (7). A soft sealing ring (30) is embedded in the annular groove (29). When the valve is closed, the sealing surface of the ball crown (6) is tightly pressed against the hard sealing layer (28) and the soft sealing ring (30) at the same time.

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