Notch semi-ball valve

Abstract

The utility model discloses a notch semi-ball valve, and particularly relates to the field of ball valves, which is characterized in that hard alloy is overlaid on a sealing surface of a ball body and a valve seat, the ball body is connected with a valve rod through a transmission pin, the valve rod is hermetically connected with a valve cover through packing and a first O-shaped ring, and the valve cover is fixed on a valve body through a bolt nut and a spiral wound gasket. The bottom cover is located below the valve body, the spring is arranged between the bottom cover and the ball body, the cushion block is arranged between the valve body and the bottom cover, the thrust pad and the anti-attrition pad are arranged between the valve rod and the valve cover, and the support is fixed to the valve cover. By means of the hemispherical ball body with the special notch design, large flow control under the small opening degree is achieved, the flow speed of media is effectively reduced, scouring and abrasion to the ball body, the valve seat and the valve body are reduced, the sealing performance and durability of the valve are greatly improved, the service life is remarkably prolonged, and the service life of the valve is prolonged. The requirements of the industrial field for efficient, safe and long-service-life valves are met.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, and more specifically to a notched semi-ball valve. Background Art

[0002] As an important control component of the pipeline system, valves are widely used to change the cross-section of the passage and the flow direction of the medium. They have the functions of diversion, cut-off, throttling, check, diversion or overflow pressure relief. Ball valves are widely used in various industries, including petroleum, chemical industry, natural gas, water treatment, etc., due to their simple structure, convenient operation, good sealing performance, and small fluid resistance. In these industries, ball valves are key equipment for regulating and controlling the flow of media;

[0003] However, the existing common ball valves have some obvious defects in practical applications, which affect their use effect and reliability under complex working conditions. The opening force of the common ball valve is large, which makes the operation inconvenient. Its sealing performance is easy to fail under high pressure difference and high flow rate, resulting in medium leakage. When the common ball valve handles medium containing solid particles or two-phase mixed flow, it is easy to be affected by scaling obstacles, resulting in valve jamming or sealing surface damage. In addition, the high-speed medium scours and wears the ball and valve seat seriously, shortening the service life of the valve and increasing the cost of maintenance and replacement. These defects limit the application of common ball valves under complex and harsh working conditions, and cannot meet the industrial field's demand for high efficiency, safety and long life of valves.

[0004] In view of the practical application of hemispheric valves under various working conditions, the notched hemispheric valve can significantly improve the above problems through its special ball notch design. This design reduces the flow rate of high-speed media when passing through the valve, thereby reducing the wear on the ball and the valve seat and extending the service life of the valve. In addition, the notch design expands the flow channel, improves the flow control ability of the valve at a small opening, ensures the smooth flow of the medium, and reduces the operating force. At the same time, the notched hemispheric valve can also effectively prevent the formation of scaling obstacles and ensure the reliability and stability of the valve when handling two-phase mixed flow media. Therefore, there is an urgent need for a notched hemispheric valve to overcome the defects in the existing technology and meet the industrial field's demand for high efficiency, safety and long life of valves. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a notched hemispherical valve, which realizes a larger flow control at a small opening through a hemispherical ball with a special notch design, effectively reduces the medium flow rate, and reduces the erosion and wear of the ball, valve seat and valve body, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a notched hemispherical valve, comprising a valve body, a valve cover, a ball, a valve stem, a valve seat, a bottom cover, a transmission pin, a packing, a packing sleeve, a packing pressure plate, a bracket, a cushion block, a spring, a first O-ring, a spiral wound gasket, a thrust pad, a friction reducing pad, a bearing, a bolt, a key and four open rings, the sealing surfaces of the ball and the valve seat are overlaid with hard alloy, the ball is connected to the valve stem through a transmission pin, the valve stem is sealed to the valve cover through packing and a first O-ring, the valve cover is fixed to the valve body through bolts, nuts and gaskets, the bottom cover is located below the valve body, the spring is arranged between the bottom cover and the ball, the cushion block is arranged between the valve body and the bottom cover, the thrust pad and the friction reducing pad are arranged between the valve stem and the valve cover, and the bracket is fixed to the valve body.

[0007] As a further solution, a spiral wound gasket is provided between the valve cover and the valve body, and the spiral wound gasket is used for sealing.

[0008] As a further solution, a packing and a second O-ring multiple seal are provided between the valve stem and the valve cover.

[0009] As a further solution, a friction-reducing pad and a thrust pad are provided between the valve stem and the valve cover to reduce the friction between the valve stem and the contact surface of the valve cover during the opening and closing process.

[0010] As a further solution, a spring is provided at the bottom cover, and the spring is used to adjust the height of the sphere so that the center line of the sphere coincides with the center lines of the valve seat and the valve body.

[0011] As a further solution, four open rings are provided at the valve seat, and the four open rings are used to fix the position of the valve seat.

[0012] As a further solution, the sphere is designed to be hemispherical with a cutout, and the cutout is designed to increase the discharge channel area for medium material deposition.

[0013] Technical effects and advantages of the utility model:

[0014] 1. The utility model connects the ball and the valve stem through a transmission pin, so that the rotation of the valve stem is accurately transmitted to the ball, which greatly reduces the opening force and improves the convenience of operation.

[0015] 2. The utility model improves sealing performance and safety by arranging packing and a second O-ring for multiple seals between the valve stem and the valve cover, and effectively prevents leakage of media under high pressure difference and high flow rate.

[0016] 3. The utility model seals the valve cover and the valve body by means of a spiral wound gasket, and combines the fixing of bolts, nuts and gaskets to enhance the stability of the structure and effectively prevent leakage of the medium.

[0017] 4. The utility model realizes automatic adjustment of the height of the ball through the cooperation of the bottom cover and the spring, ensuring that the center line of the ball coincides with the center line of the valve seat and the valve body, thereby achieving automatic centering and good sealing, reducing wear and extending service life.

[0018] 5. The utility model reduces the friction of the valve stem during rotation, reduces the operating torque, protects the contact surface, and prolongs the service life of the valve by arranging a friction-reducing pad and a thrust pad between the valve stem and the valve cover.

[0019] 6. The utility model effectively fixes the position of the valve seat by arranging four open loops at the valve seat, thereby ensuring that the valve forms an effective seal in the closed state and preventing leakage of the medium.

[0020] 7. The utility model increases the medium discharge channel area through the hemispherical ball design with a cutout, prevents the material from being retained inside the valve cavity, and at the same time provides a larger flow rate at a small opening, reduces the medium flow rate, reduces wear, and improves valve durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall cross-sectional view of the semi-ball valve of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional overall structure of the semi-ball valve of the utility model;

[0023] Figure 3 This is a schematic diagram of the ball body of the semi-spherical valve of the utility model;

[0024] Figure 4 This is a schematic diagram of the valve stem of the hemispherical valve of the utility model;

[0025] Figure 5 This is a schematic diagram of the valve cover of the hemispherical valve of the utility model;

[0026] Figure 6 It is a schematic diagram of four open loops of the utility model.

[0027] The accompanying drawings are marked as follows: 1. valve body; 2. valve cover; 3. ball; 4. valve stem; 5. valve seat; 6. bottom cover; 7. transmission pin; 8. packing; 9. packing sleeve; 10. packing pressure plate; 11. bracket; 12. pad; 13. spring; 14. first O-ring; 15. spiral wound gasket; 16. thrust pad; 17. friction reducing pad; 18. bearing; 19. bolt; 20. key; 21. four open rings; 22. bolts and nuts; 23. second O-ring. DETAILED DESCRIPTION

[0028] 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.

[0029] Refer to the instruction manual Figure 1-6 The utility model is a kind of cut-out hemispherical valve of one embodiment, including valve body 1, valve cover 2, ball 3, valve stem 4, valve seat 5, bottom cover 6, transmission pin 7, packing 8, packing gland 9, packing plate 10, bracket 11, cushion block 12, spring 13, first O-ring 14, spiral wound gasket 15, thrust pad 16, friction reducing pad 17, bearing 18, bolt 19, key 20 and four open rings 21, and the sealing surface of ball 3 and valve seat 5 is surfacing welded. The valve body 1 is provided with a hard alloy, the ball 3 is connected to the valve stem 4 through a transmission pin 7, the valve stem 4 is sealed with the valve cover 2 through a packing 8 and a first O-ring 14, the valve cover 2 is fixed to the valve body 1 through bolts 19, the bottom cover 6 is located below the valve body 1, the spring 13 is arranged between the bottom cover 6 and the ball 3, the cushion block 12 is arranged between the valve body 1 and the bottom cover 2, the thrust pad 16 and the friction reducing pad 17 are arranged between the valve stem 4 and the valve cover 2, and the bracket 11 is fixed to the valve cover 2.

[0030] A spiral wound gasket 15 is provided between the valve cover 2 and the valve body 1 for sealing. A packing 8 and a second O-ring 23 are provided between the valve stem 4 and the valve cover 2 for multiple sealing to improve sealing and safety. A friction reducing pad 17 and a thrust pad 16 are provided between the valve stem 4 and the valve cover 2 to reduce the friction between the valve stem 4 and the contact surface of the valve cover 2 during opening and closing, and reduce the operating torque. A spring 13 is provided at the bottom cover 6, and the spring 13 is used to automatically adjust the height of the ball 3 so that the center line of the ball 3 coincides with the center line of the valve seat 5 and the valve body 1, which plays a role of automatic centering. A four-open ring 21 is provided at the valve seat 5, and the four-open ring 21 is used to fix the position of the valve seat 5 to ensure that the valve forms an effective seal in the closed state to prevent medium leakage. The ball 3 is a hemispherical design with a cutout, and its cutout design is used to increase the discharge channel area for medium material deposition to prevent materials from being retained in the valve cavity. At the same time, it has a large flow rate at a small opening, reduces the medium flow rate, and reduces the wear on the ball 3, the valve seat 5 and the valve body 1.

[0031] It should be noted that the notched hemispherical valve of the utility model achieves efficient and reliable working performance through a variety of innovative structures. The ball 3 is connected to the valve stem 4 through the transmission pin 7. The rotation of the valve stem 4 can be accurately transmitted to the ball 3, so that the valve operates smoothly during opening and closing. The packing 8 and the second O-ring 23 are arranged between the valve stem 4 and the valve cover 2, providing multiple seals to ensure the sealing of the valve and the safety of operation.

[0032] The valve cover 2 and the valve body 1 are sealed by a spiral wound gasket 15. This design effectively prevents leakage of the medium, and the valve cover 2 is firmly fixed to the valve body 1 by bolts, nuts and gaskets 19, which enhances the stability of the structure. The bottom cover 6 is located below the valve body 1. The spring 13 is arranged between the bottom cover 6 and the ball 3, which can automatically adjust the height of the ball 3 so that its center line coincides with the center line of the valve seat 5 and the valve body 1, ensuring automatic centering and good sealing of the valve during operation;

[0033] A friction-reducing pad 17 and a thrust pad 16 are arranged between the valve stem 4 and the valve cover 2. These pads can reduce the friction of the valve stem during rotation, reduce the torque required for operation, and protect the contact surface between the valve stem and the valve cover, thereby extending the service life of the valve. The bracket 11 is fixed on the valve body 1, providing the necessary support and stability for the valve. The pad 12 is arranged between the valve body 1 and the valve cover 2, further enhancing the stability of the overall structure.

[0034] The valve seat 5 is provided with four open rings 21, which are used to fix the position of the valve seat to ensure that the valve forms an effective seal when the valve is closed to prevent medium leakage. The ball 3 is designed as a hemispherical shape with a cutout. This unique cutout design increases the area of ​​the medium discharge channel, prevents the material from being retained inside the valve cavity, and provides a larger flow rate at a small opening, reduces the medium flow rate, reduces the wear on the ball 3, the valve seat 5 and the valve body 1, and improves the durability of the valve;

[0035] To sum up, the notched hemispheric valve of the utility model exhibits excellent sealing performance, wear resistance and ease of operation through the precise design and close cooperation of various components, ensuring its efficient and safe operation under various working conditions. Through the optimized structural design, the utility model not only improves the service life of the valve, but also significantly reduces maintenance costs, and is suitable for a wide range of industrial application scenarios.

[0036] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0037] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0038] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A notched hemispherical valve, comprising a valve body (1), a valve cover (2), a ball (3), a valve stem (4), a valve seat (5), a bottom cover (6), a transmission pin (7), a packing (8), a packing gland (9), a packing pressure plate (10), a bracket (11), a cushion block (12), a spring (13), a first O-ring (14), a spiral wound gasket (15), a thrust pad (16), a friction reducing pad (17), a bearing (18), a bolt (19), a key (20) and four open rings (21), characterized in that: The sealing surfaces of the ball (3) and the valve seat (5) are built-up with hard alloy, the ball (3) is connected to the valve stem (4) via a transmission pin (7), the valve stem (4) is sealed to the valve cover (2) via a packing (8) and a first O-ring (14), the valve cover (2) is fixed to the valve body (1) via bolts, nuts (22) and a spiral wound gasket (15), the bottom cover (6) is located below the valve body (1), the spring (13) is arranged between the bottom cover (6) and the ball (3), the cushion block (12) is arranged between the valve body (1) and the bottom cover (6), the thrust pad (16) and the friction reducing pad (17) are arranged between the valve stem (4) and the valve cover (2), and the bracket (11) is fixed to the valve body (1).

2. The notched hemispherical valve according to claim 1, characterized in that: Multiple seals of packing (8) and a second O-ring (23) are provided between the valve stem (4) and the valve cover (2).

3. The notched hemispherical valve according to claim 1, characterized in that: The bottom cover (6) is provided with a spring (13), and the spring (13) is used to adjust the height of the ball (3) so that the center line of the ball (3) coincides with the center lines of the valve seat (5) and the valve body (1).

4. The notched hemispherical valve according to claim 1, characterized in that: The valve seat (5) is provided with four open rings (21), and the four open rings (21) are used to fix the position of the valve seat (5).

5. The notched hemispherical valve according to claim 1, characterized in that: The sphere (3) is of hemispherical design with a cutout, and the cutout is designed to increase the discharge channel area for medium material deposition.

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