◇ overview
Bellows seal valves used in the main flammable, explosive and toxic harsh conditions of the occasion by packing and bellows to achieve the dual role of the stem sealed to the outside world and the zero-valve leakage. As the bellows can only bear the tension and compression forces, can only be applied in the process of stem gate for take-off and landing in a straight line movement of the valve, the bellows valves generally limited to cut-off valve or valves. In order to seal the bellows to the principle of the wider use of research and development of the bellows seal ball.
◇ structure
Bellows sealed ball from the main body, the stem, the stem, bellows, under the stem off and composed. In the upper and lower stem are open on a pair of spiral groove track (spiral in the same direction), the two fixed sales in the stem and can be sold in the upper and lower stem the free movement of the track bed. Under the stem and ball control valves connected to the headstock.
◇ working principle
When the rotating stem, the stem is installed on the marketing of the rotation, but the lower part of the stem and the upper trough Spiral of the spiral groove to the same spin will be imposed - the reverse of the force has hindered its movement. According to the principle of balance of power on the analysis of the stem, the stem will be the role of the spiral groove up and down for only the next stretch of the fall campaign. Bellows is also due to welding in the stem, the stem off and landing to ensure the use of bellows security.
◇ Conclusion
Bellows sealed ball is a relatively new structure, which effectively solved the bellows sealed ball in the process of rotation, using two spin to the same spiral groove so that the force of the outside world in the process of passing through Three of the transformation. Two spiral groove to the same spin, and easy-to-processing, when the assembly does not need to configure, and effectively facilitate the processing of modern valve, easy assembly, reliable, safe operation of the requirements of
Bellows seal valves used in the main flammable, explosive and toxic harsh conditions of the occasion by packing and bellows to achieve the dual role of the stem sealed to the outside world and the zero-valve leakage. As the bellows can only bear the tension and compression forces, can only be applied in the process of stem gate for take-off and landing in a straight line movement of the valve, the bellows valves generally limited to cut-off valve or valves. In order to seal the bellows to the principle of the wider use of research and development of the bellows seal ball.
◇ structure
Bellows sealed ball from the main body, the stem, the stem, bellows, under the stem off and composed. In the upper and lower stem are open on a pair of spiral groove track (spiral in the same direction), the two fixed sales in the stem and can be sold in the upper and lower stem the free movement of the track bed. Under the stem and ball control valves connected to the headstock.
◇ working principle
When the rotating stem, the stem is installed on the marketing of the rotation, but the lower part of the stem and the upper trough Spiral of the spiral groove to the same spin will be imposed - the reverse of the force has hindered its movement. According to the principle of balance of power on the analysis of the stem, the stem will be the role of the spiral groove up and down for only the next stretch of the fall campaign. Bellows is also due to welding in the stem, the stem off and landing to ensure the use of bellows security.
◇ Conclusion
Bellows sealed ball is a relatively new structure, which effectively solved the bellows sealed ball in the process of rotation, using two spin to the same spiral groove so that the force of the outside world in the process of passing through Three of the transformation. Two spiral groove to the same spin, and easy-to-processing, when the assembly does not need to configure, and effectively facilitate the processing of modern valve, easy assembly, reliable, safe operation of the requirements of
