The invention provides a self-locking manhole cover. The self-locking manhole cover comprises a cover plate, a sealing piece, a protection device and a first locking piece, wherein the cover plate isused for covering a manhole in a tank car; the sealing piece is annularly arranged in the manhole and used for sealing the cover plate and the tank car; the protection device is provided with a firstconnecting part and a protection part which are sequentially connected, the first connecting part is rotationally connected to the tank car, and the protection part is arranged above the tank car at an interval; a mounting hole is formed in the protection part, penetrates through the protection part and extends in the axial diameter direction of the manhole; the first locking piece is mounted in the mounting hole; the first locking piece has a pressing position and a loosening position, and the first locking piece is propped against the cover plate in the pressing position; and the first locking piece and the cover plate are arranged at an interval in the loosening position. The protection device is arranged, so that the technical problem of poor safety performance of a traditional self-locking manhole cover is solved.

    本发明提供了一种自锁式人孔盖,包括:盖板,用于盖合罐车上的人孔;密封件,环设于人孔,用于密封所述盖板与罐车;防护装置,具有依次连接的第一连接部、防护部,所述第一连接部可旋转连接于罐车,所述防护部间隔设于罐车的上方;所述防护部上设有安装孔,所述安装孔贯穿所述防护部且沿人孔的轴径方向延伸;第一紧锁件,安装于所述安装孔;所述第一紧锁件具有压紧位置和松开位置,在所述压紧位置时,所述第一紧锁件抵接所述盖板;在所述松开位置时,所述第一紧锁件与所述盖板间隔设置。本发明通过设置防护装置,解决了传统自锁式人孔盖安全性能差的技术问题。


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    Title :

    Self-locking manhole cover


    Additional title:

    自锁式人孔盖


    Contributors:
    LU WENQUAN (author) / ZOU BIN (author) / WU ZULUN (author) / CHEN JIARUI (author) / GAO YANG (author) / XU CHENYUE (author)

    Publication date :

    2020-11-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B65D Behältnisse zur Lagerung oder zum Transport von Gegenständen oder Materialien [Container], z.B. Säcke, Beutel, Fässer, Flaschen, Dosen, Kästen, Büchsen, Schachteln, Packkörbe, Tonnen, Gläser, Flüssigkeitsbehälter, Trichtersilos, Transportbehälter , CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS / B60P Fahrzeuge zum Transport von Lasten oder zum Befördern, Tragen oder Aufnehmen besonderer Lasten oder Gegenstände , VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS



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