Stop valve

Abstract

The invention relates to a stop valve. The stop valve comprises a valve body, a valve chamber and a valve seat, wherein an opening arranged at the lateral part of the valve body, the valve chamber and a valve seat channel form a fluid channel; the stop valve is further provided with a valve rod, a connecting piece and a valve disk, the valve rod can extend in the inner cavity of the valve body and move along the longitudinal axis direction of the valve rod, and the valve rod is provided with a first end and a second end with a valve rod dent; the connecting piece is fixedly connected or combined with the second end of the valve rod, is provided with inner through holes and an upper end surface of the connecting piece and forms a valve rod chamber with the height of H1 with the top wall ofthe valve rod dent; the valve disk is provided with a valve head, a valve disk main body which passes through the inner through holes of the connecting piece and a valve disk connecting piece contained in the valve rod chamber; the lateral dimension of the valve disk connecting piece is larger than that of the inner through holes; and a first gap C1 is arranged between the valve disk main body and the inner through holes of the connecting piece and a second gap C2 is arranged between the valve disk connecting piece and the inner wall of the valve rod chamber. The stop valve features god sealing property, safety and reliability.

Description

technical field [0001] The invention relates to a cut-off valve, especially a high-temperature and high-pressure cut-off valve. Background technique [0002] Since the main fluid of the direct coal liquefaction unit is high-temperature, high-pressure solid-containing material, the requirements for equipment are very high, especially for valves on high-temperature and high-pressure pipelines. This type of wear-resistant high-temperature and high-pressure globe valve basically relies on imported products. Regardless of whether it is an industrial production device or a pilot and small test device, the wear-resistant high-temperature and high-pressure globe valves in key parts have material selection and structural design defects, which lead to short service life due to wear or seal failure during operation, and repairs need to replace the entire set Valves are time-consuming and labor-intensive, and also bring great economic losses to production and experiments. [0003] Chin...

AI Technical Summary

Problems solved by technology

Regardless of whether it is an industrial production device or a pilot and small test device, the wear-resistant high-temperature and high-pressure globe valves in key parts have material selection and structural design defects, which lead to short service life due to wear or seal failure during operation, and repairs need to replace the entire set Valves are time-consuming and labor-intensive, and also bring great economic losses to production and experiments

[0003] Chinese Patent Publication No. CN2623985 (Patent No. 03222636.5) discloses a high-temperature and high-pressure globe valve, which adopts a spherical seal and the valve ball and valve seat adopt a split structure, which is convenient for maintenance and replacement of the valve, but there is no exact data on the temperature and pressure resistance of the valve. , and it is also difficult to realize normal use under the condition of high-temperature solid-containing materials

[0004] Chinese Patent Publication No. CN2628818 (Patent No. 03256996.3) discloses a high-temperature and high-pressure angle valve, which does not need to replace the valve as a whole, only the wearing parts, and is also suitable for high-temperature (higher than 450°C) high-pressure (higher than 20MPa) solid-containing materials. It is applied under certain working conditions, but the centering structure is complicated, and the centering sealing performance is not good in practical applications, and it is easy to damage the valve stem seal

Images