一种防结晶衬氟气控釜底放料阀

Abstract

本实用新型涉及一种防结晶衬氟气控釜底放料阀，属于阀门技术领域，包括阀体、阀盖、阀座、球体、阀杆、气动执行器，在阀体与阀杆之间设置填料箱，在阀盖、阀体、阀杆、填料箱与接触介质部位衬四氟层；在阀盖进口侧设置温度传感器，在阀门安装于反应釜底部后，传感器伸入反应釜内，监测、控制反应釜内介质温度，防止介质低温结晶，避免了在反应釜内独立安装温度传感器的麻烦，减少反应釜的设备安装数量；在球体与填料箱之间设置弹性密封装置，利用耐腐弹性密封环弹性压装在球体与填料箱的四氟层内，防止进口阀座发生泄漏时，介质从中腔沿阀杆外圆面泄漏到外界，产生安全隐患，提高产品的密封性能和使用安全性。

Claims

1. A fluoropolymer-lined gas-controlled bottom discharge valve for preventing crystallization, comprising a valve body (1), a valve cover (4), a valve seat, a ball (3), a valve stem (16), and a pneumatic actuator. The valve cover (4) is fixedly and sealed at the bottom of the reactor by a flange. The valve seat includes an inlet valve seat (5) and an outlet valve seat (2). The inlet valve seat (5) is installed on the inner wall of the lower end of the inlet channel (6) of the valve cover (4). The valve body (1) and the valve cover (4) are connected by bolts. The outlet valve seat (2) is installed on the radial step between the outlet channel (21) of the valve body (1) and the valve cavity. The ball (3) and the valve stem (16) adopt an integral structure. A stuffing box (14) is provided between the middle cavity of the valve body (1) and the valve stem (16). The valve cover (4), the valve body (1), the valve stem (16), the stuffing box (14), and the parts in contact with the medium are lined with PTFE. The application is characterized in that A temperature sensor (7) is installed in the inlet channel (6) of the valve cover (4). The temperature sensor (7) is installed above the inlet channel (6) of the valve cover (4) through a hollow tube (8). The hollow tube (8) is fixedly installed in the mounting hole made in the inner wall of the inlet channel (6) of the valve cover (4). A PTFE layer (9) is provided on the outer surface of the hollow tube (8). An annular platform concentric with the valve stem (16) is made at the connection between the ball (3) and the valve stem (16). An elastic sealing device is set between the annular platform and the stuffing box (14). The elastic sealing device is composed of a corrosion-resistant elastic sealing ring (15) with a V-shaped cross section set between the annular platform and the stuffing box (14). The outer rings on both sides of the V-shaped opening of the corrosion-resistant elastic sealing ring (15) are respectively pressed and installed on the PTFE layer on the end face of the annular platform and the stuffing box (14).

2. The anti-crystallization fluorine-lined air-controlled tank bottom discharge valve according to claim 1, characterized in that: There is a packing cavity between the packing box (14) and the valve stem (16). The outer circle of the packing box (14) is provided with an outer step in the middle. The outer step is pressed and sealed with the inner step of the valve body (1) cavity. The sealing packing (18) is pressed and installed in the packing cavity by the cylindrical end face of one end of the mounting frame (20). The mounting frame (20) and the packing box (14) are connected to each other by a connecting flange. A pneumatic actuator is installed in the plane of the other end of the mounting frame (20). There is an annular cavity between the inner hole of the mounting frame (20) and the outer circle of the valve stem (16). A positioning sleeve (17) is installed in the annular cavity. The positioning sleeve (17) is sealed in the annular cavity by a pressure plate (19). The pressure plate (19) is fixedly installed in the annular cavity made in the plane of the mounting frame (20).

3. The anti-crystallization fluorine-lined air-controlled tank bottom discharge valve according to claim 1 or 2, characterized in that: The mounting hole on the inner wall of the valve cover (4) inlet channel (6) consists of an axial mounting hole and a radial positioning hole. The hollow tube (8) is an L-shaped round tube. The vertical part of the L-shaped round tube extends along the axial mounting hole to the top of the valve cover (4) inlet channel (6), and the horizontal part extends through the radial positioning hole to the outside of the valve cover (4) inlet channel (6). The temperature sensor (7) is installed at the upper end of the vertical part of the hollow tube (8), and its signal line (10) passes through the inner hole of the hollow tube (8) and connects to the signal connector (13) at the end of the horizontal part of the hollow tube (8).

4. The anti-crystallization fluorine-lined air-controlled tank bottom discharge valve according to claim 1, characterized in that in A locking device is provided between the horizontal part of the L-shaped tube and the valve cover (4). The locking device consists of a boss (11) provided on the outside of the radial positioning hole of the valve cover (4) and a locking nut (12) installed between the outer circular surface of the horizontal part of the L-shaped tube. The locking nut (12) is threadedly engaged with the outer circular surface of the horizontal part of the L-shaped tube, and its end face is pressed against the platform of the boss (11).

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