Water turbine water inlet ball valve with double soft and hard seals

Abstract

The utility model relates to the technical field of ball valves, and provides a double soft and hard seal water turbine water inlet ball valve which comprises a ball valve assembly, the ball valve assembly comprises a valve shell, through cavities and an installation cavity, the installation cavity is formed in the valve shell, the through cavities are formed in the positions, on the two sides of the installation cavity, in the valve shell, and a ball body is arranged in the installation cavity. By arranging the soft sealing structure, the spring is fixed in the adjusting groove and is in a compressed state, when a gap is formed between one side of the sealing ring and the ball body due to mutual abrasion, the spring rebounds and abuts against the sealing ring through the movable rod, so that one side of the sealing ring abuts against the ball body, and therefore the sealing ring is sealed. And one side of the sealing ring always abuts against the outer side of the ball body, the sealing performance of the outer side of the ball body is guaranteed, the automatic sealing function of the device is achieved, and the sealing performance of the water inlet ball valve in use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a double soft and hard sealing water turbine water inlet ball valve. Background Art

[0002] As a key control element in hydropower generation, ball valves are widely used in large and medium-sized hydropower stations. They are installed in front of the turbine and used as a turbine inlet valve to connect the upstream pressure steel pipe and the downstream volute inlet pipe. In order to meet the high requirements of hydropower generation on the sealing performance of ball valves, it is necessary to develop a new sealing structure. Therefore, it is necessary to design a double soft and hard sealing turbine inlet ball valve to improve the sealing performance and reliability of the ball valve.

[0003] In the prior art, the sealing of the ball valve mainly relies on the sealing between the spherical surface of the ball and the sealing ring. During long-term use, partial wear will occur between the two, affecting the sealing performance. Therefore, it is necessary to design a water inlet ball valve that can automatically tighten and increase the sealing performance. Utility Model Content

[0004] The utility model aims to provide a double soft and hard seal turbine water inlet ball valve, which is used to solve the defect that the sealing of the existing ball valve mainly depends on the sealing between the spherical surface of the sphere and the sealing ring. During long-term use, partial wear will occur between the two, affecting the sealing performance.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a double soft and hard seal water turbine water inlet ball valve, comprising a ball valve assembly;

[0006] The ball valve assembly comprises a valve housing, a through cavity and an installation cavity. The installation cavity is provided inside the valve housing, and through cavities are provided inside the valve housing on both sides of the installation cavity.

[0007] A sphere is arranged inside the installation cavity, and soft sealing structures are arranged on both sides of the installation cavity outside the sphere, and the soft sealing structures include sealing rings, moving rods, adjusting grooves, fixing plates and springs. The adjusting grooves are evenly arranged inside the valve housing on both sides of the installation cavity, and fixing plates are fixed on the inner wall of the valve housing inside the adjusting grooves. A spring is evenly fixed on one side of the fixing plate, and a moving rod is fixed on one end of the spring away from the fixing plate, and one end of the moving rod extends to the outside of the adjusting groove and is fixed with a sealing ring;

[0008] A mounting plate is fixed on one side of the valve housing, and a control structure is arranged on the top of the valve housing, wherein the control structure comprises a handle, a rotating rod, a reserved groove, a clamping groove and a clamping block;

[0009] A hard sealing structure is fixed on the outer wall of the bottom of the rotating rod.

[0010] Furthermore, the sealing rings are symmetrically distributed on both sides of the sphere, and one side of the sealing ring and the outer wall of the sphere are in contact with each other.

[0011] Furthermore, the moving rods form a telescopic structure through springs, and the moving rods are distributed at equal intervals on one side of the sealing ring.

[0012] Furthermore, the reserved groove is opened at the top of the valve housing, a rotating rod passes through the interior of the reserved groove, a handle is fixed to the top of the rotating rod, the clamping groove is opened at the top of the sphere, and a clamping block is arranged inside the clamping groove.

[0013] Furthermore, the top end of the clamping block is fixedly connected to the bottom end of the rotating rod, and the top view cross section of the clamping block is in a "cross" shape.

[0014] Furthermore, the hard sealing structure includes a first connecting ring, a first sealing ring, a second sealing ring and a second connecting ring. The first connecting ring is arranged inside the reserved groove, the first sealing ring is evenly fixed on the inner wall of the first connecting ring, the second sealing ring is arranged in the middle of the adjacent first sealing rings, and the second connecting ring is fixed on the side of the second sealing ring away from the first connecting ring.

[0015] Furthermore, the outer side wall of the first connecting ring is fixedly connected to the inner wall of the valve housing, and the inner side wall of the second connecting ring is fixedly connected to the outer side wall of the rotating rod.

[0016] The utility model provides a double soft and hard seal water turbine water inlet ball valve, which has the advantages of:

[0017] By providing a soft sealing structure, the spring is fixed inside the adjusting groove and is in a compressed state. When a gap appears between one side of the sealing ring and the ball due to mutual wear, the spring will rebound and contact the sealing ring through the moving rod, so that one side of the sealing ring and the ball contact each other, ensuring that one side of the sealing ring always contacts the outside of the ball, ensuring the sealing of the outside of the ball, realizing the automatic sealing function of the device, and improving the sealing of the water inlet ball valve when in use;

[0018] By providing a control structure, when the handle is turned, the handle will drive the block to rotate through the rotating rod, and the block and the ball are engaged through the slot. When the block rotates, the ball will be driven to rotate. After the ball rotates, its opening direction will change. When the opening direction of the ball is the same as the opening direction of the through cavity, the valve body is in an open state. When the ball is rotated so that the opening direction of the ball and the opening direction of the through cavity are perpendicular to each other, the valve body is in a closed state, so that the device has the function of conveniently controlling the opening and closing of the valve body, and improves the convenience of the water inlet ball valve when in use.

[0019] By providing a hard sealing structure, the first sealing ring and the second sealing ring are staggered, and the two sides of the first sealing ring and the second sealing ring are in contact with each other, which can prevent water from seeping out through the reserved groove, thereby realizing the sealing function of the device and improving the sealing performance of the water inlet ball valve when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0023] Figure 4 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 For the utility model Figure 3 The enlarged structural diagram at B in the middle;

[0025] Figure 6 It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0026] Explanation of the reference numerals in the figure: 1. ball valve assembly; 11. valve housing; 12. through cavity; 13. installation cavity; 2. sphere; 3. soft sealing structure; 31. sealing ring; 32. moving rod; 33. adjusting groove; 34. fixing plate; 35. spring; 4. installation plate; 5. control structure; 51. handle; 52. rotating rod; 53. reserved groove; 54. clamping groove; 55. clamping block; 6. hard sealing structure; 61. first connecting ring; 62. first sealing ring; 63. second sealing ring; 64. second connecting 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] See also Figure 1-Figure 6 The utility model provides a double soft and hard seal water turbine water inlet ball valve, comprising a ball valve assembly 1.

[0029] Reference Figure 3 , Figure 4 and Figure 6 The ball valve assembly 1 includes a valve housing 11, a through cavity 12 and an installation cavity 13. The installation cavity 13 is opened inside the valve housing 11. Through cavities 12 are opened inside the valve housing 11 on both sides of the installation cavity 13. A ball 2 is arranged inside the installation cavity 13. Soft sealing structures 3 are arranged on both sides of the installation cavity 13 outside the ball 2. The soft sealing structure 3 includes a sealing ring 31, a moving rod 32, an adjusting groove 33, a fixing plate 34 and a spring 35. The adjusting grooves 33 are evenly opened inside the valve housing 11 on both sides of the installation cavity 13. A fixing plate 34 is fixed on the inner wall of the valve housing 11 inside the groove 33, and a spring 35 is evenly fixed on one side of the fixing plate 34. A moving rod 32 is fixed to the end of the spring 35 away from the fixing plate 34. One end of the moving rod 32 extends to the outside of the adjusting groove 33 and is fixed with a sealing ring 31. The sealing rings 31 are symmetrically distributed on both sides of the sphere 2, and one side of the sealing ring 31 and the outer wall of the sphere 2 are in conflict with each other. The moving rod 32 forms a telescopic structure through the spring 35, and the moving rod 32 is evenly distributed on one side of the sealing ring 31.

[0030] The spring 35 is fixed inside the adjustment groove 33 and is in a compressed state. When a gap appears between one side of the sealing ring 31 and the sphere 2 due to mutual wear, the spring 35 will rebound and contact the sealing ring 31 through the moving rod 32, so that one side of the sealing ring 31 and the sphere 2 contact each other, ensuring that one side of the sealing ring 31 always contacts the outside of the sphere 2, thereby ensuring the sealing of the outside of the sphere 2.

[0031] Reference Figure 1-Figure 3 A mounting plate 4 is fixed to one side of the valve housing 11, and a control structure 5 is arranged on the top of the valve housing 11. The control structure 5 includes a handle 51, a rotating rod 52, a reserved groove 53, a clamping groove 54 and a clamping block 55. The reserved groove 53 is opened at the top of the valve housing 11, and the rotating rod 52 runs through the reserved groove 53. The top of the rotating rod 52 is fixed with the handle 51, the clamping groove 54 is opened at the top of the sphere 2, and the clamping block 55 is arranged inside the clamping groove 54. The top end of the clamping block 55 is fixedly connected to the bottom end of the rotating rod 52, and the top view cross section of the clamping block 55 is designed in a "cross" shape.

[0032] By turning the handle 51, the handle 51 will drive the block 55 to rotate through the rotating rod 52. The block 55 and the ball 2 are engaged with each other through the slot 54. When the block 55 rotates, the ball 2 is driven to rotate. After the ball 2 rotates, the direction of its opening will change. When the opening direction of the ball 2 is the same as the opening direction of the through cavity 12, the valve body is in an open state. When the ball 2 is rotated so that the opening direction of the ball 2 and the opening direction of the through cavity 12 are perpendicular to each other, the valve body is in a closed state.

[0033] Reference Figure 3 and Figure 5A hard sealing structure 6 is fixed on the outer wall at the bottom of the rotating rod 52, and the hard sealing structure 6 includes a first connecting ring 61, a first sealing ring 62, a second sealing ring 63 and a second connecting ring 64. The first connecting ring 61 is arranged inside the reserved groove 53, and the first sealing ring 62 is evenly fixed on the inner wall of the first connecting ring 61. A second sealing ring 63 is arranged in the middle of adjacent first sealing rings 62, and a second connecting ring 64 is fixed on the side of the second sealing ring 63 away from the first connecting ring 61. The outer wall of the first connecting ring 61 is fixedly connected to the inner wall of the valve housing 11, and the inner wall of the second connecting ring 64 is fixedly connected to the outer wall of the rotating rod 52.

[0034] The first sealing ring 62 and the second sealing ring 63 are staggered with each other, and both sides of the first sealing ring 62 and the second sealing ring 63 are in contact with each other, so as to prevent water from leaking out through the reserved groove 53 .

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double soft and hard seal water turbine water inlet ball valve, comprising a ball valve assembly (1); Features: The ball valve assembly (1) comprises a valve housing (11), a through cavity (12) and an installation cavity (13); the installation cavity (13) is provided inside the valve housing (11); and through cavities (12) are provided inside the valve housing (11) on both sides of the installation cavity (13); A ball (2) is arranged inside the installation cavity (13), and soft sealing structures (3) are arranged on both sides of the installation cavity (13) outside the ball (2). The soft sealing structure (3) comprises a sealing ring (31), a moving rod (32), an adjusting groove (33), a fixing plate (34) and a spring (35). The adjusting groove (33) is evenly arranged inside the valve housing (11) on both sides of the installation cavity (13), and a fixing plate (34) is fixed on the inner wall of the valve housing (11) inside the adjusting groove (33). A spring (35) is evenly fixed on one side of the fixing plate (34), and a moving rod (32) is fixed on one end of the spring (35) away from the fixing plate (34). One end of the moving rod (32) extends to the outside of the adjusting groove (33) and is fixed with a sealing ring (31). A mounting plate (4) is fixed to one side of the valve housing (11), and a control structure (5) is arranged on the top of the valve housing (11), wherein the control structure (5) comprises a handle (51), a rotating rod (52), a reserved groove (53), a clamping groove (54) and a clamping block (55); A hard sealing structure (6) is fixed on the outer wall of the bottom of the rotating rod (52).

2. A double soft and hard seal water turbine inlet ball valve according to claim 1, characterized in that: The sealing rings (31) are symmetrically distributed on both sides of the sphere (2), and one side of the sealing ring (31) and the outer wall of the sphere (2) are in contact with each other.

3. A double soft and hard seal water turbine water inlet ball valve according to claim 1, characterized in that: The moving rods (32) form a telescopic structure through springs (35), and the moving rods (32) are distributed at equal intervals on one side of the sealing ring (31).

4. A double soft and hard seal water turbine water inlet ball valve according to claim 1, characterized in that: The reserved groove (53) is formed at the top of the valve housing (11), a rotating rod (52) is passed through the reserved groove (53), a handle (51) is fixed to the top of the rotating rod (52), the clamping groove (54) is formed at the top of the sphere (2), and a clamping block (55) is arranged inside the clamping groove (54).

5. A double soft and hard seal water turbine water inlet ball valve according to claim 4, characterized in that: The top end of the clamping block (55) is fixedly connected to the bottom end of the rotating rod (52), and the top view cross section of the clamping block (55) is in a "cross" shape.

6. A double soft and hard seal water turbine water inlet ball valve according to claim 1, characterized in that: The hard sealing structure (6) comprises a first connecting ring (61), a first sealing ring (62), a second sealing ring (63) and a second connecting ring (64); the first connecting ring (61) is arranged inside the reserved groove (53); the first sealing ring (62) is evenly fixed on the inner side wall of the first connecting ring (61); the second sealing ring (63) is arranged in the middle of each adjacent first sealing ring (62); and the second connecting ring (64) is fixed on the side of the second sealing ring (63) away from the first connecting ring (61).

7. A double soft and hard seal water turbine water inlet ball valve according to claim 6, characterized in that: The outer wall of the first connecting ring (61) is fixedly connected to the inner wall of the valve housing (11), and the inner wall of the second connecting ring (64) is fixedly connected to the outer wall of the rotating rod (52).

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