Structure of a cold and hot water mixing valve of a balance valve

An improved structure of the cold and hot water mixing valve of a balance valve comprising a gate cap, a joystick control device formed by a set of a joystick, a joystick seat, a hat, and a sealing, a movable disk, a fixing disk, a disk sealing, a balance valve cover plat, a balance valve sealing, a balance valve body and a gate body, a concave portion being installed on the lower wall of the mixing gate, which is exactly covered by a balance valve cover plate, the concave portion and the bottom surface of the balance valve cover plate near the cold and hot water inlets being installed with a balance valve upper seat and a balance valve lower seat, respectively;

• characterized in that:
• a first sealing trench is installed on the concave portion of the lower wall of the gate body along the water through holes and with a proper distance to the periphery around the balance valve lower seat, a second sealing trench is installed on the lower surface of the balance valve cover plate and with a proper distance with the periphery around the balance valve upper seat, a third sealing trench is installed on the upper surface of the balance valve cover plate along the periphery of the water through holes and with a proper distance to the periphery of the hole;
• a fourth sealing trench is installed on the lower surface of the fixing disk along the periphery of the water through holes and with a proper distance to the periphery of the holes, wherein the sealing trench on the concave portion has a shape symmetric to that of the sealing trench on the lower surface of the balance valve cover plate, and the sealing trench on the upper surface of the balance valve cover plate has a shape symmetric to that of sealing trench on the lower surface of the fixing disk, the depths of the sealing trenches are smaller than that of the radii of the cross sections of the sealing ring strips for sealing;
• the sealing of the balance valve is located between the sealing trenches of the concave portion and the lower surface of the balance valve cover plate, and disk sealing is located between the sealing trenches of the upper surface of the balance valve cover plate and the lower surface of the fixing disk.