A split ball valve

Abstract

The utility model discloses a kind of bisecting formula ball valves, including valve body, valve stem and ball, and the valve body is also provided with stuffing box, the stuffing gland connected with the stuffing box is equipped, to the first packing compression in the stuffing box is equipped;The opposite face of the valve body and the stuffing box is connected by the tooth surface equipped. As described above, the contact place of the valve body and the stuffing box changes the traditional light surface design, utilizes the tooth surface contact, i.e. becomes the tooth-shaped sealing structure form contact, so as to ensure the machining precision, increase the contact area of the left and right valve body and the stuffing box, enhance the sealing performance, and as far as possible reduce the possibility of medium leakage from the stuffing box.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a split-type ball valve. Background Technology

[0002] Split-type ball valves function as open / close valves in pipelines, and the medium flow direction does not affect their operation. Common split-type ball valves, such as those with notification number CN204493780U, have a smooth surface design at the contact point between the valve body and the stuffing box. With repeated opening and closing, leakage frequently occurs at the stuffing box, and tightening the bolts on the packing gland does not solve the problem. Replacing the packing in-line is also very dangerous. To improve the leakage problem at the stuffing box, a split-type ball valve was developed. Utility Model Content

[0003] The purpose of this invention is to provide a split-type ball valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a split ball valve, comprising a valve body, a valve stem, and a ball, wherein the valve body is further provided with a stuffing box, which is connected to the stuffing box by a stuffing gland, so as to compact the provided first packing inside the stuffing box; the opposing surfaces of the valve body and the stuffing box are connected by provided toothed surfaces.

[0005] As a preferred technical solution of this utility model: the stuffing box is further provided with a second packing, and the first packing and the second packing are separated by an isolation ring provided on the stuffing box.

[0006] As a preferred technical solution of this utility model: the stuffing box is further provided with a gasket, and the gasket is located between the second packing and the isolation ring.

[0007] As a preferred technical solution of this utility model: the first filler includes a support portion, and both ends of the support portion are provided with sealing portions.

[0008] As a preferred technical solution of this utility model: the upper end of the sealing part is provided with a sharp corner, and the lower end of the sealing part is provided with a rounded corner.

[0009] As a preferred technical solution of this utility model: the valve body is further provided with a valve seat, one side of the valve seat is connected to the valve body through a supporting pad, and the other side of the valve seat is in contact with the outer wall surface of the ball through a sealing ring.

[0010] As a preferred technical solution of this utility model: the first packing and the second packing have the same structure, and the sharp corner of the first packing is installed facing upwards, while the sharp corner of the second packing is installed facing downwards.

[0011] As a preferred technical solution of this utility model, both the stuffing box and the gasket are made of stainless steel.

[0012] The beneficial effects of this utility model by adopting the above technical solution are as follows: the contact area between the valve body and the stuffing box changes the traditional smooth surface design and uses toothed contact, that is, it becomes a toothed sealing structure contact. Therefore, while ensuring the machining accuracy, it increases the contact area between the left and right valve bodies and the stuffing box, enhances the sealing performance, and minimizes the possibility of medium leakage from the stuffing box. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0015] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle;

[0016] Figure 4 This is a schematic diagram of the main structure of the first packing material of this utility model;

[0017] Figure 5 for Figure 4 A magnified view of a portion of point C.

[0018] In the diagram: 1. Valve body; 2. Stuffing gland; 3. Valve stem; 4. Ball; 5. Stuffing gland; 6. First packing; 60. Support; 61. Sealing part; 62. Sharp corner; 63. Rounded corner; 7. Toothed surface; 8. Gasket; 9. Second packing; 10. Isolation ring; 11. Sealing ring; 12. Valve seat; 13. Support pad. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0020] Please see Figure 1-5The present invention provides an embodiment of a split ball valve, comprising a valve body 1, a valve stem 3 and a ball 4, wherein the valve body 1 is further provided with a stuffing box 2, which is connected to the stuffing box 2 by a stuffing cap 5, so as to compact the provided first stuffing 6 into the stuffing box 2; the opposing surfaces of the valve body 1 and the stuffing box 2 are connected by a toothed surface 7.

[0021] In summary, the contact area between the valve body 1 and the stuffing box 2 has changed from the traditional smooth surface design to a toothed surface 7, which is a toothed sealing structure. Therefore, while ensuring machining accuracy, the contact area between the left and right valve bodies and the stuffing box 2 is increased, enhancing the sealing performance and minimizing the possibility of media leakage from the stuffing box.

[0022] Furthermore, since the stuffing box 2 is also provided with a second packing 9, and the first packing 6 and the second packing 9 are separated by the isolation ring 10 provided on the stuffing box 2, the sealing performance between the stuffing box 2 and the valve body 1 can be further improved because there are two packings in the stuffing box 2. At the same time, the two packings are separated, so that the first packing 6 and the second packing 9 adopt an upper and lower two-section installation structure in the stuffing box 2, which is beneficial to enhance the strength of the packing and maintain the resilience of the packing.

[0023] To improve the compaction capacity of the packing, a gasket 8 is provided inside the stuffing box 2, and the gasket 8 is located between the second packing 9 and the isolation ring 10. Therefore, the first packing 6 and the second packing 9 are isolated by the isolation ring 10 and the gasket 8, which can enhance the strength of the packing, maintain the resilience of the packing, and reduce the amount of packing used.

[0024] To enhance the strength and resilience of the packing material, the first packing 6 includes a support portion 60, with sealing portions 61 at both ends of the support portion 60. The upper end of the sealing portion 61 has a sharp corner 62, and the lower end of the sealing portion 61 has a rounded corner 63. Furthermore, the first packing 6 and the second packing 9 have identical structures, with the sharp corner 62 of the first packing 6 facing upwards and the sharp corner 62 of the second packing 9 facing downwards. This assembly method also helps to enhance the strength and maintain the resilience of the packing material. Both the stuffing box 2 and the gasket 8 are made of stainless steel, and the packing material is PTFE.

[0025] In summary, the stuffing box 2 is made of high-quality stainless steel with good corrosion resistance and toughness, while the first packing 6 and the second packing 9 are made of PTFE. The first packing 6 is installed above the stuffing box 2, and the second packing 9 is installed below. Using the isolation ring 10 and the gasket 8, the two packings are divided into upper and lower sections, thus enhancing the strength of the PTFE packing and more effectively maintaining its resilience. Simultaneously, this combination ensures the material performance while maximizing the stability of the PTFE seal under long-term operating conditions.

[0026] In addition, since the valve body 1 is also provided with a valve seat 12, one side of the valve seat 12 is connected to the valve body 1 through a support pad 13, and the other side of the valve seat 12 is in contact with the outer wall of the ball 4 through a sealing ring 11, the ball 4 can rotate stably and reliably inside the valve body 1.

[0027] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A split ball valve, characterized by: It includes a valve body (1), a valve stem (3) and a ball (4), and the valve body (1) is also provided with a stuffing box (2), which is connected to the stuffing box (2) by a stuffing cap (5) so as to compact the first packing (6) inside the stuffing box (2); The opposing surfaces of the valve body (1) and the stuffing box (2) are connected by toothed surfaces (7).

2. A split ball valve according to claim 1, characterized in that: The stuffing box (2) is also provided with a second packing (9), and the first packing (6) and the second packing (9) are separated by an isolation ring (10) provided on the stuffing box (2).

3. A split ball valve according to claim 2, characterized in that: The stuffing box (2) is also provided with a gasket (8), and the gasket (8) is located between the second packing (9) and the isolation ring (10).

4. A split ball valve according to claim 3, wherein: The first filler (6) includes a support (60), and both ends of the support (60) are provided with sealing portions (61).

5. A split ball valve according to claim 4, characterized in that: The upper end of the sealing part (61) is provided with a sharp corner (62), and the lower end of the sealing part (61) is provided with a rounded corner (63).

6. A split-type ball valve according to claim 5, characterized in that: The valve body (1) is also provided with a valve seat (12). One side of the valve seat (12) is connected to the valve body (1) through a support pad (13), and the other side of the valve seat (12) is in contact with the outer wall of the ball (4) through a sealing ring (11).

7. A split ball valve according to claim 6, characterized in that: The first packing (6) has the same structure as the second packing (9), and the sharp corner (62) of the first packing (6) is installed facing upwards, while the sharp corner (62) of the second packing (9) is installed facing downwards.

8. A split ball valve according to claim 7, characterized in that: Both the stuffing box (2) and the gasket (8) are made of stainless steel.

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