| 摘要 |
PCT No. PCT/SE86/00224 Sec. 371 Date Jan. 7, 1987 Sec. 102(e) Date Jan. 7, 1987 PCT Filed May 14, 1986 PCT Pub. No. WO86/07418 PCT Pub. Date Dec. 18, 1986.A device for changing the number of part streams of a flowing medium comprises a tube (7) with a plurality of holes (11) through the tube wall and a piston (12) displaceable in the tube (7). By means of said piston (12) the interior of the tube can be divided such that a desirable number of holes (11) communicate with a first compartment (13) in the tube intended to be through-flowed by a medium. Through a second compartment (14) in the tube there is extending a piston rod (15) connected with the piston (12). For the change of the number of holes (7) communicating with said first compartment (13), at least one of a determined number of sleeve members (19-21), which are removably applied around the piston rod (15), is arranged to change place on the piston rod between a position within the tube (7) and a position axially outside the tube (7). In the latter position the member is placed between a first stop member (16), which abuts against an end surface of the tube (7), and a second stop member (17), which is arranged to keep the first stop member (16) axially pressed against said end surface. The remaining sleeve members are the same time clamped between the piston (12) and the first stop member (16). The device may be utilized, for instance, at the inlet of a plate evaporator. |
