Pressure pre-tightening type corrosion-resistant ball valve

Abstract

The utility model belongs to the technical field of ball valves, and particularly relates to a pressure pre-tightening type corrosion-resistant ball valve which comprises a valve body, a ball body arranged in the valve body, a valve rod arranged on the valve body, a gland arranged on the valve rod, padding arranged below the gland, a sealing ring arranged on the valve rod and a wear-resistant part arranged on the outer side of the ball body. A first cavity is formed between the inner wall and the outer wall of the ball body, corrosion-resistant blocks are arranged in the first cavity, a second cavity is formed in the wear-resistant part, first wear-resistant blocks are arranged in the second cavity, second wear-resistant blocks are arranged in the second cavity, a corrosion-resistant coating is arranged on the outer side of the ball body, and the number of the first wear-resistant blocks and the number of the second wear-resistant blocks are multiple. And the first wear-resistant blocks and the second wear-resistant blocks are staggered. Through the arrangement of the wear-resistant part, the first cavity, the corrosion-resistant block, the second cavity, the first wear-resistant block, the second wear-resistant block and the corrosion-resistant coating, the wear resistance and the corrosion resistance of the ball body of the ball valve can be greatly improved finally through the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a pressure pre-tightening type corrosion-resistant ball valve. Background Art

[0002] Ball valve, the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. The valve seat of the ball valve is mainly pressed against the ball under the pressure or preload of the fluid, and the valve seat material is plastically deformed to achieve sealing. The sealing effect depends on the degree to which the valve seat can compensate for the non-roundness and microscopic surface unevenness of the ball under the pressure of the fluid or the preload. There are many types of pressure preloaded ball valves, and floating ball valves are one of them. Floating ball valves are widely used due to their smooth fluid flow, good sealing, easy operation and simple maintenance.

[0003] During use, the existing pressure-preloaded ball valve will repeatedly rotate the ball and rub against the inner wall of the valve body, causing the ball to gradually wear out. In addition, the surface of the ball that is in contact with the fluid in the valve body for a long time will gradually be corroded. Long-term wear and corrosion of the ball will affect the sealing effect of the ball. The wear and corrosion resistance of the ball of the ball valve needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pressure-preloaded corrosion-resistant ball valve, which solves the problem that the existing pressure-preloaded ball valve, during use, the ball repeatedly rotates and rubs against the inner wall of the valve body, causing the ball to gradually wear out, and the surface of the ball that is in contact with the fluid in the valve body for a long time will gradually be corroded. The long-term wear and corrosion of the ball will affect the sealing effect of the ball, and the wear and corrosion resistance of the ball of the ball valve needs to be improved.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a pressure-preloaded corrosion-resistant ball valve, comprising a valve body, a ball arranged in the valve body, a valve stem arranged on the valve body, a pressure cover arranged on the valve stem, a packing arranged under the pressure cover, a sealing ring arranged on the valve stem, a wear-resistant part arranged on the outside of the ball, a first cavity is opened between the inner wall and the outer wall of the ball, a corrosion-resistant block is arranged in the first cavity, a second cavity is opened in the wear-resistant part, a first wear-resistant block is arranged in the second cavity, a second wear-resistant block is arranged in the second cavity, and a corrosion-resistant coating is arranged on the outside of the ball.

[0006] As a preferred technical solution of the utility model, two sides of the corrosion-resistant block are respectively fixedly mounted on two sides of the inner wall of the first cavity, and the corrosion-resistant block is semicircular as a whole.

[0007] As a preferred technical solution of the utility model, there are several groups of corrosion-resistant blocks, and the material of the corrosion-resistant blocks is consistent with that of the sphere.

[0008] As a preferred technical solution of the utility model, one side of the wear-resistant part is laid and fixed on the outside of the sphere, and the specific material of the wear-resistant part is soft silica gel.

[0009] As a preferred technical solution of the utility model, the two sides of the first wear-resistant block are fixedly installed on the inner walls of the second cavity, and the two sides of the second wear-resistant block are fixedly installed on the inner walls of the second cavity. The first wear-resistant block and the second wear-resistant block are both trapezoidal as a whole.

[0010] As a preferred technical solution of the utility model, the first wear-resistant blocks and the second wear-resistant blocks have several groups, the first wear-resistant blocks and the second wear-resistant blocks are staggered, and the specific materials of the first wear-resistant blocks and the second wear-resistant blocks are soft rubber.

[0011] As a preferred technical solution of the utility model, the inner side and the outer side of the sphere and the outer side of the corrosion-resistant block are coated with a corrosion-resistant coating, and the specific material of the corrosion-resistant coating is epoxy resin coating.

[0012] Compared with the prior art, the utility model provides a pressure pre-tightening corrosion-resistant ball valve, which has the following beneficial effects:

[0013] This kind of pressure pre-tightening corrosion-resistant ball valve is provided with a wear-resistant part, a first cavity, a corrosion-resistant block, a second cavity, a first wear-resistant block, a second wear-resistant block, and a corrosion-resistant coating. When the ball rotates repeatedly, the inner wall of the valve body will first contact one side of the wear-resistant part. Since the specific material of the wear-resistant part is soft silicone, the wear resistance of the outer side of the ball can be initially improved. After one side of the wear-resistant part is completely worn, the inner wall of the valve body will contact the first wear-resistant block and the second wear-resistant block. Since the first wear-resistant block and the second wear-resistant block themselves have good wear resistance, the wear resistance of the other side of the wear-resistant part can be increased. After the first wear-resistant block and the second wear-resistant block are completely worn, the wear resistance Wear only begins on the other side of the part, which can greatly improve the wear resistance of the outside of the sphere. When the wear-resistant part is completely worn, the fluid in the valve body will be in contact with the outside of the sphere for a long time when the ball valve is closed. When one side of the first cavity is damaged due to fluid corrosion, the corrosion-resistant block can increase the contact area between the other side of the second cavity and the fluid, thereby increasing the corrosion resistance of the other side of the inner wall of the first cavity. The corrosion-resistant coating can improve the corrosion resistance of the inside and outside of the sphere and the outside of the corrosion-resistant block, and ultimately increase the corrosion resistance of the entire valve body. This structure can ultimately greatly improve the wear resistance and corrosion resistance of the ball of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the sphere and wear-resistant parts of the utility model;

[0016] Figure 3 This is a three-dimensional schematic diagram of the appearance of the sphere of the utility model;

[0017] Figure 4 This is a schematic diagram of the corrosion-resistant coating of the utility model.

[0018] In the figure: 1. valve body; 2. ball; 3. valve stem; 4. gland; 5. packing; 6. sealing ring; 7. wear-resistant part; 8. first cavity; 9. corrosion-resistant block; 10. second cavity; 11. first wear-resistant block; 12. second wear-resistant block; 13. corrosion-resistant coating. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-4 In this embodiment: a pressure-preloaded corrosion-resistant ball valve comprises a valve body 1, a ball 2 is arranged in the valve body 1, a valve stem 3 is arranged on the valve body 1, a pressure cover 4 is arranged on the valve stem 3, a packing 5 is arranged under the pressure cover 4, a sealing ring 6 is arranged on the valve stem 3, a wear-resistant part 7 is arranged on the outside of the ball 2, a first cavity 8 is opened between the inner wall and the outer wall of the ball 2, a corrosion-resistant block 9 is arranged in the first cavity 8, a second cavity 10 is opened in the wear-resistant part 7, a first wear-resistant block 11 is arranged in the second cavity 10, a second wear-resistant block 12 is arranged in the second cavity 10, and a corrosion-resistant coating 13 is arranged on the outside of the ball 2.

[0021] In this embodiment, the two sides of the corrosion-resistant block 9 are respectively fixedly installed on the two sides of the inner wall of the first cavity 8. The corrosion-resistant block 9 is semicircular as a whole. When one side of the inner wall of the first cavity 8 is corroded and damaged, the corrosion-resistant block 9 can increase the contact area between the other side of the inner wall of the first cavity 8 and the fluid in the valve body 1, thereby increasing the overall corrosion resistance of the first cavity 8; there are several groups of corrosion-resistant blocks 9, and the material of the corrosion-resistant blocks 9 is consistent with the material of the sphere 2. The opening and closing of the ball valve can be controlled by rotating the sphere 2; one side of the wear-resistant part 7 is laid and fixed on the outside of the sphere 2. The specific material of the wear-resistant part 7 is soft silicone. Since the specific material of the wear-resistant part 7 is soft silicone, it has good wear resistance itself, which can preliminarily improve the wear resistance of the outside of the sphere 2; the two sides of the first wear-resistant block 11 are fixedly installed in the second cavity 10 On both sides of the inner wall, both sides of the second wear-resistant block 12 are fixedly installed on both sides of the inner wall of the second cavity 10, the first wear-resistant block 11 and the second wear-resistant block 12 are both trapezoidal as a whole, and the second cavity 10 can facilitate the installation of the first wear-resistant block 11 and the second wear-resistant block 12; the first wear-resistant block 11 and the second wear-resistant block 12 have a total of several groups, the first wear-resistant blocks 11 and the second wear-resistant blocks 12 are staggered, the specific materials of the first wear-resistant blocks 11 and the second wear-resistant blocks 12 are both soft rubber, and the first wear-resistant block 11 combined with the second wear-resistant block 12 can improve the overall wear-resistant effect of the wear-resistant part 7; the inner and outer sides of the sphere 2 and the outer side of the corrosion-resistant block 9 are coated with a corrosion-resistant coating 13, the specific material of the corrosion-resistant coating 13 is epoxy resin coating, and the corrosion-resistant coating 13 can improve the corrosion resistance of the sphere 2 and the corrosion-resistant block 9.

[0022] The working principle and use process of the utility model: the operator first checks whether the relevant components are installed in the correct position. At this time, the floating ball valve can be used normally. Since the floating ball valve is a mature equipment, its operating principle and related components are well known to professionals in the relevant technical field of this utility model, so they are not explained here. When the ball 2 rotates repeatedly, the inner wall of the valve body 1 will first contact one side of the wear-resistant part 7. Since the specific material of the wear-resistant part 7 is soft silicone, it has good wear resistance and can initially improve the wear resistance of the outer side of the ball 2. After one side of the wear-resistant part 7 is worn out, the inner wall of the valve body 1 will contact the first wear-resistant block 11 and the second wear-resistant block 12. Since the specific materials of the first wear-resistant block 11 and the second wear-resistant block 12 are both soft rubber, the first wear-resistant block 11 and the second wear-resistant block 12 themselves Both have good wear resistance and can increase the wear resistance of the other side of the wear-resistant part 7. The other side of the wear-resistant part 7 starts to wear only after the first wear-resistant block 11 and the second wear-resistant block 12 are completely worn out, thereby greatly improving the wear resistance of the outside of the ball 2. When the wear-resistant part 7 is completely worn out, in the closed state of the ball valve, the fluid in the valve body 1 will be in contact with the outside of the ball 2 for a long time. When one side of the first cavity 8 is damaged due to fluid corrosion, the corrosion-resistant block 9 can increase the contact area between the other side of the first cavity 8 and the fluid, thereby increasing the corrosion resistance of the other side of the inner wall of the first cavity 8. The corrosion-resistant coating 13 can improve the corrosion resistance of the inner and outer sides of the ball 2 and the outer side of the corrosion-resistant block 9, and ultimately increase the overall corrosion resistance of the valve body 1. This structure can ultimately greatly improve the wear and corrosion resistance of the ball 2 of the ball valve.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pressure preloaded corrosion-resistant ball valve, comprising a valve body (1), characterized in that: A sphere (2) is arranged in the valve body (1), a valve stem (3) is arranged on the valve body (1), a gland (4) is arranged on the valve stem (3), a packing (5) is arranged below the gland (4), a sealing ring (6) is arranged on the valve stem (3), a wear-resistant part (7) is arranged on the outer side of the sphere (2), a first cavity (8) is defined between the inner wall and the outer wall of the sphere (2), a corrosion-resistant block (9) is arranged in the first cavity (8), a second cavity (10) is defined in the wear-resistant part (7), a first wear-resistant block (11) is arranged in the second cavity (10), a second wear-resistant block (12) is arranged in the second cavity (10), and a corrosion-resistant coating (13) is provided on the outer side of the sphere (2).

2. The pressure preloaded corrosion resistant ball valve according to claim 1, characterized in that: The two sides of the corrosion-resistant block (9) are respectively fixedly mounted on the two sides of the inner wall of the first cavity (8), and the corrosion-resistant block (9) is semicircular in shape as a whole.

3. The pressure preloaded corrosion resistant ball valve according to claim 1 is characterized in that: There are a total of several groups of the corrosion-resistant blocks (9), and the material of the corrosion-resistant blocks (9) is consistent with the material of the sphere (2).

4. The pressure preloaded corrosion resistant ball valve according to claim 1 is characterized in that: One side of the wear-resistant part (7) is laid and fixed on the outside of the sphere (2), and the specific material of the wear-resistant part (7) is soft silica gel.

5. The pressure preloaded corrosion resistant ball valve according to claim 1 is characterized in that: The two sides of the first wear-resistant block (11) are fixedly mounted on the two sides of the inner wall of the second cavity (10), and the two sides of the second wear-resistant block (12) are fixedly mounted on the two sides of the inner wall of the second cavity (10), and the first wear-resistant block (11) and the second wear-resistant block (12) are both trapezoidal in shape as a whole.

6. The pressure preloaded corrosion resistant ball valve according to claim 1, characterized in that: The first wear-resistant blocks (11) and the second wear-resistant blocks (12) have a total of several groups, the first wear-resistant blocks (11) and the second wear-resistant blocks (12) are arranged in an alternating manner, and the specific material of the first wear-resistant blocks (11) and the second wear-resistant blocks (12) is soft rubber.

7. The pressure preloaded corrosion resistant ball valve according to claim 1, characterized in that: The inner side and the outer side of the sphere (2) and the outer side of the corrosion-resistant block (9) are coated with a corrosion-resistant coating (13), and the specific material of the corrosion-resistant coating (13) is epoxy resin paint.

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