검색연산자 | 기능 | 검색시 예 |
---|---|---|
() | 우선순위가 가장 높은 연산자 | 예1) (나노 (기계 | machine)) |
공백 | 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 | 예1) (나노 기계) 예2) 나노 장영실 |
| | 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 | 예1) (줄기세포 | 면역) 예2) 줄기세포 | 장영실 |
! | NOT 이후에 있는 검색어가 포함된 문서는 제외 | 예1) (황금 !백금) 예2) !image |
* | 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 | 예) semi* |
"" | 따옴표 내의 구문과 완전히 일치하는 문서만 검색 | 예) "Transform and Quantization" |
국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | F16K-031/14 |
미국특허분류(USC) | 137/489 ; 137/490 ; 137/62564 ; 251/26 |
출원번호 | US-0174612 (1993-12-28) |
우선권정보 | CN-0104261 (1991-07-02) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 6 인용 특허 : 0 |
An isolation automatic control valve is formed by disposing an isolation valve of very simple structure in the inlet and outlet passages of a main valve or in the passage joining a main valve and its pilot valve, which not only controls normal operation during automatic controlling but also can isolate the main valve from the pilot valve for on-line maintenance while simultaneously controlling operation of the main valve manually or automatically. The isolation valve includes a throttling function to enable the main valve to acquire various control param...
An isolation automatic control valve comprising an automatic main valve and a pilot valve, characterized in that said isolation automatic control valve further comprises an isolation valve; said isolation valve is disposed on a passage connecting said main valve and said pilot valve; said isolation valve comprises a valve body and a valve core; the circumference of said valve core precisely fits a bore formed in said valve body and includes channels formed therein; said valve core is moveable within said bore of said valve body; said channels, when said ...