发明名称 |
Diaphragm valve actuator - has sleeve with coarse external and fine internal thread between hub and core |
摘要 |
The diaphragm valve has a threaded spindle working in a tapped bore in the housing. A sleeve-type hub (2) coupled to a drive (3) turns but cannot slide in the housing (1). The spindle (5) inside the hub comprises a sleeve (6), and a core (7) which cannot turn in the housing. The sleeve engages via a coarse-pitch external thread (8) with the hub, and via a fine-pitch internal one (9) with the core. In its end position retracted into the sleeve, a stop face (11) on the core bears against a mating one (12) in the sleeve, generating friction torque. By turning the hub, the sleeve is movable into an end position protruding from it, in which a threadless portion (13) of its outside surface bears against a similar inside one (14) in the hub, generating a coupling friction torque between the two. ADVANTAGE - Rapid closing combined with high closing pressure.
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申请公布号 |
DE4101075(A1) |
申请公布日期 |
1991.08.01 |
申请号 |
DE19914101075 |
申请日期 |
1991.01.16 |
申请人 |
HAAS, HARTMUT, 4971 HUELLHORST, DE |
发明人 |
HAAS, HARTMUT, 4971 HUELLHORST, DE |
分类号 |
F16K31/50 |
主分类号 |
F16K31/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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