Seat sealing structure of catalyst regulating cut-off ball valve in continuous reforming regeneration unit

Abstract

The invention relates to a valve seat seal structure for a catalyst adjusting and cutting ball valve of a continuous catalytic reforming and regenerating device. The valve seat seal structure comprises a valve body, a valve seat, a valve ball, a pressing ring, a supporting ring and a pressure ring; the valve seat is installed in the valve body; the pressing ring is arranged on the outer side of the valve seat and presses the valve seat on the valve body to form sealing; the supporting ring is arranged on the outer side of the pressing ring; the pressure ring is arranged on the outer side of the supporting ring; a valve seat sealing face is arranged on the edge of an inner hole of the valve seat; the valve seat sealing face and the valve ball are pressed to form sealing; and the side, facing the valve seat, of the pressing ring is sequentially provided with a first sealing flange, a second sealing flange and a limiting flange from bottom to top. The valve seat seal structure for the catalyst adjusting and cutting ball valve of the continuous catalytic reforming and regenerating device is simple in structure and compact in design and has the beneficial effects that material accumulation is prevented, blocking and obscuring are prevented, sealing is reliable, and the service life is long, and it can be guaranteed that the device stably and efficiently runs and the valve seat seal structure for the catalyst adjusting and cutting ball valve of the continuous catalytic reforming and regenerating device can be widely applied into a closed hopper discharging control valve of the continuous catalytic reforming and regenerating device in the oil refining industry.

Description

technical field [0001] The invention relates to a valve seat sealing structure of a catalyst regulating cut-off ball valve of a continuous reforming regeneration device, and belongs to the technical field of fluid control valves. Background technique [0002] In the lock hopper feeding unit of the continuous reforming regeneration unit in the modern crude oil refining industry, high-pressure nitrogen gas of about 0.89MPa is used to transport catalyst particles with a diameter of about 1.5 to 1.6mm to the downstream pipeline. The catalyst adjustment cut-off ball valve installed here is used as catalyst delivery The "throat" of the pipeline, its performance parameters and service life directly affect the production efficiency and maintenance cycle of the whole set of equipment. At the same time, the working conditions of the catalyst regulating cut-off ball valve are also very complicated: [0003] 1. Easy to accumulate material. After a large number of catalyst particles flo...

AI Technical Summary

Problems solved by technology

After a large number of catalyst particles flowing through the pipeline enter the valve, they are very easy to accumulate in various gaps. The long-term accumulated particles will block the spring cavity on the back of the valve seat, causing the valve seat to lose its elasticity, which will cause the valve to jam and seal. Severe failure sites such as increased wear and tear;

[0004] 2. Easy to get stuck

During the valve switching process, if high-hardness catalyst particles are mixed between the valve ball and the sealing surface of the valve seat, the sealing surface will be severely worn, which will lead to increased leakage of the valve and jamming of the action;

[0005] 3. Severe erosion

[0006] 4. High sealing requirements

[0007] 5. High action frequency

In the current existing technology, ordinary V-shaped ball valves are usually used as the blanking control valve for the locking hopper. Due to the existence of various gaps such as the compensation spring space and the assembly gap between the valve seat and the valve body, the valve is often accumulated and blocked by catalyst particles, causing the valve to move. Faults such as jamming and abnormal wear of the sealing surface, and because the sealing specific pressure between the valve seat and the valve ball is too high and the spherical surface hardness is insufficient, the service life of the valve rarely exceeds 2 to 3 months, and the use of the catalyst feeding control valve is too short Periodic and high maintenance frequency seriously limit the quality stability and production efficiency of the whole set of equipment

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