Ball body of two-way double-seal ball valve

Abstract

The utility model relates to the technical field of valves, and discloses a two-way double-sealing ball body of a ball valve, which comprises a ball body, a medium channel is arranged in the ball body, a spline groove is arranged at the upper end of the ball body, a shaft groove is arranged at the lower end of the ball body, mounting grooves are arranged on the ball body on two sides of the spline groove, and sealing rings are fixedly arranged in the mounting grooves. A limiting groove is formed in the outer side of the sealing ring, a plurality of limiting pieces are fixedly mounted in the limiting groove, a plurality of positioning grooves are formed in the bottom in the mounting groove, and spiral grooves are formed in the bottoms in the positioning grooves. The two installation grooves are formed in the outer side of the ball body, the sealing rings are installed in the installation grooves in a limited mode through the multiple limiting pieces, the air cavities are formed in the sealing rings, long-term pressure applying on the sealing rings can be achieved in cooperation with the multiple sets of positioning bases and the compression springs, and therefore certain pressure can be kept in the air cavities in the sealing rings for a long time; therefore, tightness of the sealing ring and a sealing structure in the valve can be improved, sealing effect is improved, and service life is prolonged.

Description

Technical Field

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

[0002] The ball in the ball valve is the core component, usually a solid structure, made of metal or engineering plastics, with a precision-machined surface. The ball is provided with a through hole that matches the inner diameter of the pipe. The valve can be opened, closed and the flow rate can be adjusted by rotating the ball.

[0003] In industrial piping systems, ball valves are key components. The sealing structure between the ball and the valve seat of an ordinary ball valve is often affected by medium erosion and pressure fluctuations for a long time, resulting in a gradual decrease in the sealing effect and leakage. For example, the Chinese utility model patent disclosed by publication number CN204628624U: Ball valve ball, its conventional sealing method mostly relies on the elasticity of the sealing ring itself to achieve sealing. When facing complex working conditions, it is difficult to maintain a tight fit for a long time. Once the sealing ring is worn or aged, the risk of sealing failure will increase significantly. In addition, under the dual effects of frequent opening and closing and medium erosion, the ball and sealing ring of ordinary materials may experience surface wear, corrosion pits and other conditions in a short period of time, which seriously shortens the overall service life of the ball valve and increases the equipment maintenance cost and the risk of production suspension. Utility Model Content

[0004] The utility model aims to provide a bidirectional double-sealed ball valve ball body, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A two-way double-sealed ball valve ball comprises a ball, a medium channel is provided in the ball, a spline groove is provided at the upper end of the ball, an axis groove is provided at the lower end of the ball, and mounting grooves are provided on both sides of the spline groove, a sealing ring is fixedly installed in the mounting groove, a limiting groove is provided on the outer side of the sealing ring, and a plurality of limiting plates are fixedly installed in the limiting groove.

[0007] As a further preferred embodiment of the present invention, a plurality of positioning grooves are provided at the bottom of the installation groove, and a screw groove is provided at the bottom of the installation groove. The setting of the installation groove can provide basic conditions for the installation of the sealing ring, and cooperate with the positioning groove and the screw groove to provide conditions for limiting and fixing the installation groove.

[0008] As a further preferred solution of the utility model, an air cavity is provided in the sealing ring.

[0009] As a further preferred solution of the utility model, a plurality of positioning seats are fixedly installed on the inner side of the sealing ring, the sealing ring is clamped in one of the installation grooves, and the positioning seat is inserted and installed in one of the positioning grooves.

[0010] As a further preferred solution of the utility model, a plurality of fixing screws are inserted and installed in the limiting plate, and one end of the fixing screw passes through the channel in the sealing ring and is threadedly connected in one of the screw grooves.

[0011] As a further preferred scheme of the utility model, a compression spring is sleeved on the outside of the fixing screw, and one side of the compression spring is in contact with one side of the positioning seat, and the other side of the compression spring is in contact with the inner side of the positioning groove. The sealing ring with an air cavity is clamped in the installation groove, and can be limited and fixed in the installation groove in cooperation with a limiting plate and a fixing screw to prevent the sealing ring from falling off. At the same time, multiple compression springs perform multi-point extrusion and support on the sealing ring through the positioning seat, so that a certain pressure can be maintained in the air cavity for a long time, thereby improving the sealing effect and service life of the sealing ring.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, two installation grooves are opened on the outside of the sphere, and a sealing ring is installed in the installation groove by means of a plurality of limit plates, and an air cavity is opened in the sealing ring, which can cooperate with a plurality of sets of positioning seats and compression springs to realize long-term pressure on the sealing ring, so that the air cavity in the sealing ring can maintain a certain pressure for a long time, thereby improving the tightness between the sealing ring and the internal sealing structure of the valve, thereby improving the sealing effect and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0017] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0018] Figure 5 It is a partial cross-sectional view of the sealing ring of the utility model;

[0019] Figure 6 It is a cross-sectional view of the main structure installation structure of the utility model.

[0020] In the figure: 1. sphere; 2. medium channel; 3. spline groove; 4. shaft groove; 5. mounting groove; 6. sealing ring; 7. limit plate; 8. positioning groove; 9. screw groove; 10. air cavity; 11. positioning seat; 12. fixing screw; 13. compression spring; 14. limit groove. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-Figure 6 As shown, the utility model provides a bidirectional double-sealed ball valve ball, including a ball 1, a medium channel 2 is opened in the ball 1, a spline groove 3 is opened at the upper end of the ball 1, an axis groove 4 is opened at the lower end of the ball 1, and the ball 1 located on both sides of the spline groove 3 is also opened with installation grooves 5, a sealing ring 6 is fixedly installed in the installation groove 5, a limiting groove 14 is opened on the outer side of the sealing ring 6, and a plurality of limiting plates 7 are fixedly installed in the limiting groove 14.

[0023] like Figure 1-Figure 5 As shown, a plurality of positioning grooves 8 are provided at the bottom of the mounting groove 5, and a screw groove 9 is provided at the bottom of the positioning groove 8. The setting of the mounting groove 5 can provide basic conditions for the installation of the sealing ring 6, and cooperate with the positioning groove 8 and the screw groove 9 to provide conditions for the limiting fixation of the mounting groove 5. An air cavity 10 is provided in the sealing ring 6, and a plurality of positioning seats 11 are fixedly installed on the inner side of the sealing ring 6. The sealing ring 6 is clamped in one of the mounting grooves 5, and the positioning seat 11 is inserted and installed in one of the positioning grooves 8. A plurality of fixing screws 12 are inserted and installed in the limiting sheet 7, and one end of the fixing screw 12 passes through the channel in the sealing ring 6 and is threadedly connected therein. In a screw groove 9, a compression spring 13 is sleeved on the outside of the fixing screw 12, and one side of the compression spring 13 abuts against one side of the positioning seat 11, and the other side of the compression spring 13 abuts against the inner side of the positioning groove 8. The sealing ring 6 with the air cavity 10 is clamped in the installation groove 5, and can be limited and fixed in the installation groove 5 in cooperation with the limiting piece 7 and the fixing screw 12 to prevent the sealing ring 6 from falling off. At the same time, multiple compression springs 13 perform multi-point extrusion support on the sealing ring 6 through the positioning seat 11, which can maintain a certain pressure in the air cavity 10 for a long time, thereby improving the sealing effect and service life of the sealing ring 6.

[0024] It should be noted that the utility model is a two-way double-sealed ball valve ball. When the sealing ring 6 is assembled into the mounting groove 5, a plurality of compression springs 13 are first pre-placed into the corresponding positioning groove 8. Then, the sealing ring 6 can be clamped into the mounting groove 5 by the ductility of the material of the sealing ring 6 itself, and a plurality of positioning seats 11 on the inner side of the mounting groove 5 are clamped into the corresponding positioning groove 8. Then, the two limiting pieces 7 are respectively inserted into the limiting groove 14. Then, the plurality of positioning seats 11 can be sequentially passed through the limiting pieces 7 and the sealing ring 6. And it can be threadedly connected in the corresponding screw groove 9, so that the final assembly action of the sealing ring 6 is realized by two limit plates 7 and multiple fixing screws 12. At this time, one end of multiple compression springs 13 always supports the positioning seat 11 and provides it with a certain pressure, so that the air cavity 10 in the sealing ring 6 always maintains a certain pressure, and then when the ball 1 rotates and closes in the valve body, the outer surfaces of the sealing ring 6 located on both sides of the limit groove 14 can tightly contact the sealing mechanism in the valve body, thereby improving the sealing effect.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A two-way double-sealed ball valve ball, characterized by: The invention comprises a sphere (1), wherein a medium channel (2) is provided in the sphere (1), a spline groove (3) is provided at the upper end of the sphere (1), an axis groove (4) is provided at the lower end of the sphere (1), and mounting grooves (5) are provided on both sides of the spline groove (3). A sealing ring (6) is fixedly installed in the mounting groove (5), a limiting groove (14) is provided on the outer side of the sealing ring (6), and a plurality of limiting plates (7) are fixedly installed in the limiting groove (14).

2. A two-way double-sealed ball valve ball according to claim 1, characterized in that: A plurality of positioning grooves (8) are provided at the bottom of the installation groove (5), and a screw groove (9) is provided at the bottom of the positioning groove (8).

3. A two-way double-sealed ball valve ball according to claim 2, characterized in that: An air cavity (10) is provided in the sealing ring (6).

4. A two-way double-sealed ball valve ball according to claim 2, characterized in that: A plurality of positioning seats (11) are fixedly mounted on the inner side of the sealing ring (6); the sealing ring (6) is clamped in one of the mounting grooves (5), and the positioning seat (11) is inserted and mounted in one of the positioning grooves (8).

5. A two-way double-sealed ball valve ball according to claim 4, characterized in that: A plurality of fixing screws (12) are inserted and installed in the limiting plate (7), and one end of the fixing screw (12) passes through a channel in the sealing ring (6) and is threadedly connected in one of the screw grooves (9).

6. A two-way double-sealed ball valve ball according to claim 5, characterized in that: A compression spring (13) is sleeved on the outside of the fixing screw (12), and one side of the compression spring (13) abuts against one side of the positioning seat (11), while the other side of the compression spring (13) abuts against the inside of the positioning groove (8).

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