| 摘要 |
The invention relates to civil engineering. The technical result is the expansion of the range of means for continuous adjustment of level of heating of a heating appliance to allow the appliance connection to a single-pipe heating system with provision of a bypass section, characterised by reliability both in operation and at the stage of commissioning and providing precise adjustment with a minimum variation of adjustment parameters between appliances of the same series. The valve comprises a body 1 with an inlet pipe 2, an outlet pipe 3, a bypass pipe and a valve pipe 5, and a controlled valve assembly 6 with a bushing 7, a stem 8 and a valve disk 9. The inlet pipe 2 and the outlet pipe 3 are located on the same axis and are separated by a solid partition 10. The axis of the bypass pipe is transverse to the axis of the pipes 2, 3, and the bypass pipe is interconnected with the cavity 11 of the inlet pipe 2. The axis of the valve pipe 5 is transverse to the plane of the axes of the inlet pipe 2, outlet pipe 3 and bypass pipe, and the cavity 12 of the valve pipe 5 is in communication with the cavity 11 through the opening 13 located on the axis of the cavity 12, and interconnected with the cavity 15 through the channel 14. A valve seat 17 for fitting the valve disk 9 is made on the surface 16 of the inlet pipe 2 inside the cavity 12, around the opening 13. The stem 8 of the controlled valve assembly 6 is mounted in its bushing 7 and can move in reciprocate manner so that one (first) stem end 18 protrudes from one side of the bushing 7, and the other end 19 carrying the valve disk 9 protrudes from the other side. The stem 8 is spring-loaded in the bushing 7 towards pushing the first end 18 out of the bushing 7 that is rigidly fixed in the valve pipe 5 to provide contact of the valve disk 9 with the valve seat 17 as the stem 8 is moved inwards the body, and the bushing 7 has an outside threaded section for fastening the valve control member. The minimum cross-sectional area of the channel 14 and the cross-sectional area of the opening 21 are less than the cross-sectional area of the opening 13 that interconnects the cavity 11 of the inlet pipe 2 with the cavity 12 of the valve pipe 5. |
