CN204784825U - High temperature high pressure ball valve - Google Patents

Abstract

A high-temperature and high-pressure ball valve, including a valve body, a ball, an upper valve stem, and a lower valve stem. A ball is arranged in the valve body. The middle part of the upper end of the ball is fixedly connected with the upper valve stem. There is a bonnet at the lower end of the valve body, the bonnet is fixed on the valve body by fasteners, the lower valve stem runs through the bonnet and is fixedly installed on the bonnet by fasteners, the lower valve stem is T-shaped, and its "1"-shaped part There is a groove on the surface of the section, and a sealing element is provided in the groove for sealing with the valve cover; the "one"-shaped section of the lower valve stem is in contact with the surface of the valve cover, and there is a radial opening between the two C-shaped sealing ring, the opening direction of the C-shaped sealing ring points to the center, and the material of the C-shaped sealing ring is nickel-chromium-iron alloy. The beneficial effect of the utility model is that: the C-shaped sealing ring has the effect of energy storage, and can realize sealing and bonding with the valve cover in the vertical direction and radial direction, thereby better ensuring the sealing performance of the valve.

Description

A high temperature and high pressure ball valve

Technical field

The utility model relates to a valve, in particular to a ball valve.

Background technique

At present, in the ball valve of the prior art, the lower valve stem is usually sealed by a wound gasket. The disadvantage of this sealing method is that only the end face seal can be formed between the valve cover and the lower valve stem, and the seal cannot be realized in the radial direction. The medium is very easy to leak from the radial gap, especially under high temperature and high pressure conditions, it is more likely to cause leakage accidents.

Utility model content

In order to overcome the above-mentioned shortcomings of the existing ball valve, the utility model provides a safe, reliable, high-temperature and high-pressure ball valve with good sealing performance.

The technical solution adopted by the utility model to solve the technical problem is that a high-temperature and high-pressure ball valve includes a valve body, a sphere, an upper valve stem, and a lower valve stem. The middle part of the lower end of the ball is coaxially rotated and installed on the lower valve stem. The lower end of the valve body is provided with a valve cover. The valve cover is fixed on the valve body through fasteners. , the lower valve stem is T-shaped, with a groove on the surface of the "1"-shaped section, and a sealing element is provided in the groove for sealing with the bonnet; the "one"-shaped section of the lower valve stem is in contact with the bonnet The surfaces are in contact, and a C-shaped sealing ring with a radial opening is arranged between the two. The opening direction of the C-shaped sealing ring points to the center, and the material of the C-shaped sealing ring is nickel-chromium-iron alloy.

The beneficial effect of the utility model is: between the lower valve stem and the valve cover, there are sealing elements in the vertical section and the horizontal section, forming a double seal, and the self-structure of the C-shaped sealing ring has the effect of energy storage. When the medium enters, not only the upper and lower ends of the C-shaped sealing ring can be sealed and fitted to the valve cover, but also the radial direction can be sealed and fitted to the valve cover, which can better ensure the sealing performance of the valve; The sealing ring is made of nickel-chromium-iron alloy material, which can be applied to high temperature and high pressure working conditions.

Description of drawings

Fig. 1 is the structural representation of embodiment;

Fig. 2 is an enlarged view of A in Fig. 1 .

In the figure: 1. Upper valve stem; 2. Valve body; 3. Ball; 4. Lower valve stem; 5. Valve cover; 6. Sealing element; 7. C-shaped sealing ring.

Detailed ways

As shown in Figures 1 and 2, a high-temperature and high-pressure ball valve includes a valve body 2, a ball 3, an upper valve stem 1, and a lower valve stem 4. The valve body 2 is provided with a ball 3, and the middle part of the upper end of the ball 3 is connected to the upper valve stem 1. Fixed connection, the middle part of the lower end of the ball 3 rotates coaxially on the lower valve stem 4, the lower end of the valve body 2 is provided with a valve cover 5, the valve cover 5 is fixed on the valve body 2 by fasteners, and the lower valve stem 4 runs through the valve cover 5 It is fixedly installed on the valve cover 5 by fasteners, the lower valve stem 4 is T-shaped, and the surface of its "1"-shaped section is provided with a groove, and a sealing element 6 is arranged in the groove for connecting with the valve cover 5. Between the seal; the "one"-shaped part of the lower valve stem 4 is in contact with the surface of the valve cover 5, and a C-shaped sealing ring 7 with a radial opening is arranged between the two. The opening direction of the C-shaped sealing ring 7 points to the center, and the C The material of the shaped sealing ring 7 is nickel-chromium-iron alloy.

Claims (1)

1. A high-temperature and high-pressure ball valve, comprising a valve body, a sphere, an upper valve stem, and a lower valve stem. The valve body is provided with a sphere, the middle part of the upper end of the sphere is fixedly connected with the upper valve stem, and the middle part of the lower end of the sphere is coaxially rotated on the lower valve stem. The lower end of the valve body is provided with a bonnet, the bonnet is fixed on the valve body by fasteners, the lower valve stem passes through the bonnet and is fixedly installed on the bonnet by fasteners, it is characterized in that: The lower valve stem is T-shaped, with a groove on the surface of the "1"-shaped section, and a sealing element is arranged in the groove for sealing with the valve cover; the "one"-shaped section of the lower valve stem is in contact with the The surfaces of the valve cover are in contact with each other, and a C-shaped sealing ring with a radial opening is arranged between the two. The opening direction of the C-shaped sealing ring points to the center, and the material of the C-shaped sealing ring is nickel-chromium-iron alloy.