| 摘要 |
<p>1,065,633. Valves; pipe connections. 0. KRACHT, J. KRACHT, and L. KRACHT. April 10, 1964 [April 11, 1963]. No. 14857/64. Headings F2G and F2V. A valve assembly is formed by a number of multi-way spool-valves 2, 4, Fig. I, and an inlet member 6 which are physically connected by flattened tubes 18, 24, 26, 28, 30, 32, the tubes also comprising fluid passages between the valves; upper and lower tubes 18 serve as exhaust passages which tubes are joined by a pipe 19 with an outlet port 20. The tube 24 with an inlet port 22 serves as a supply means and four perpendicular tubes 34 are provided with enlarged ends 36 forming working ports. The inlet member 6 includes a pressure relief valve 42 and a check valve 44, whilst the lower end of each spool valve casing 8, 10 is closed by a detachable plate 47; connecting lugs 45 are provided. The entire assembly is soldered together in a vacuum after some initial spotwelding. The ends 36 may be flanged or threaded to receive a nut whereby the assembly may be secured in a sealed manner to a tank; the ends may form part of a plate having a further mounting plate. In a modification, the working ports are formed in tubes 62, 64, Fig. 6, which are disposed in the same direction as the other flat tubes 66, 68, 70, 80 and 84. One continuous but partitioned tube 82 may be used instead of the individual tubes, such as 62, 64. The upper end of the valve casings have caps 90 with seals 92; grooves 94 are provided to receive spring washers 100 whereby additional parts are secured, e.g. casings 96, 98, which may be of injection moulded plastic and house means for hydraulic actuation of the valve. A doubleacting check-valve 108 is provided below the relief valve 102. The structure may be strongthened by plates 112 and rings 114, 116. The enlarged ends have port fittings 128, Fig. 7, with a nut 120 housing a clamping ring 122, which fitting has a bore terminating in a conical part 130 within which extends a recess 132 parallel to lateral recesses 126; further recesses 134 form lugs 136 which latter together with recesses 126, 134 constitute soldering faces. One of the spool valves may supply a doubleacting hydraulic motor (180, Fig. 11, not shown), the line leading to the head-end of the motor including a pressure-relief valve (210) with an adjustable loading spring (196). The valve casing (186) which is soldered to an adaptor 119 of the spool valve (58) has a junction member (190) and an exhaust tube (204) soldered thereto. A similar valve may be inserted in the rod-end line.</p> |
