CN2166158Y

CN2166158Y - Cover for blind drain

Info

Publication number: CN2166158Y
Application number: CN 93237551
Authority: CN
Inventors: 卫跃英
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-02
Filing date: 1993-09-02
Publication date: 1994-05-25
Anticipated expiration: 2003-09-02

Abstract

The utility model relates to a well cover for a blind drain, which belongs to a manhole checking well cover for underground structures. The utility model is characterized in that a key hole is arranged on the center of a cover body, and a locking pin mechanism which is inserted into the side wall of a well opening is arranged below the hole; the locking pin mechanism is a linkage device which is composed of a wedgy movable swallowing block, a cambered shifting fork, a transversal pull plate, a connecting screw bolt and a lock bolt, wherein the upper end of the shifting fork is meshed with a sliding track of the movable swallowing block and the lower end is connected with the lock bolt through the transversal pull plate and the screw bolt. The well cover uses a screw bolt-shaped key to control the ascent and the descent of the movable swallowing block to drive the linkage device, so linkage locking or unlocking of the well cover is realized. Therefore, the utility model has a theftproof function.

Description

Cover for blind drain

The utility model relates to a kind of Cover for blind drain, belongs to the hand-hole manhole cover of underground structure.

Because the development of urban construction, be distributed in the underground of big townlet as the spider webs such as water supply and sewerage pipeline, gaspipe line and cable circuit, form huge underground construction, for the hand-hole of opening of these underground installations of maintenance management is checked well head, the structure and material of its lid is different, but scarcely possess the safe antitheft function, thereby be unfavorable for management maintenance and personal safety guarantee.

The purpose of this utility model is the above-mentioned defective that overcomes existing hand-hole manhole cover, designs a kind of Cover for blind drain with lockmaking mechanism and anti-theft feature.

The purpose of this utility model is that the specific constructive form by a kind of Cover for blind drain that provides as accompanying drawing realizes:

Fig. 1 is that described covered conduit advances to cover overall structure schematic diagram (front view);

Fig. 2 is dead bolt and a connecting bolt structural representation thereof in the described overall structure;

Fig. 3 is described Cover for blind drain key schematic diagram;

Fig. 4 is described Cover for blind drain keyhole protecting cover schematic diagram.

As shown in FIG., of the present utility model being characterised in that: the center at described Cover for blind drain lid 3 has keyhole, the latch gear of inserting to well head sidewall 14 is housed below this keyhole, and this latch gear is swallowed sth. raw and whole the linkage that piece 5, arc shift fork 6, horizontal arm-tie 8, bolt 11 and connector 9 thereof and dead bolt 13 are formed by wedge shape; The upper end of described arc shift fork 6 is engaged in the sliding rail groove of swallowing sth. raw and whole piece 5, and the center of this arc shift fork 6 is hinged by means of pivot pin and the shift fork post 4 that is fixed on the lid 3; The lower end of arc shift fork 6 is hinged with horizontal arm-tie 8 one ends, and the other end of horizontal arm-tie 8 joins with dead bolt 13 through lintel 10 by means of bolt 11.

Cover for blind drain described in the utility model also is furnished with bolt shape key 1 and keyhole protecting cover 2, and screwed keyhole is complementary on they and the lid 3.Tension spring 7 is housed between arc shift fork 6, compression spring 12 is housed on bolt.When carrying out lockmaking between lid 3 and the well head sidewall 14, key 1 is not in keyhole, and as shown in Figure 1, dead bolt 13 passes the through hole of dead bolt pillar 15 and injects in the hole slot of well head sidewall 14 at this moment, and lid 3 can not be opened.In with key 1 precession keyhole, then promote to swallow sth. raw and whole piece 5 and move down, shift fork 6 upper ends separate to both sides, because of the central pivot point effect, its lower end is drawn in, thereby spur horizontal arm-tie 8 and bolt 11, dead bolt is drawn out of from the hole slot of well head sidewall 14, realizes the release between lid 3 and the well head sidewall 14.

Advantage of the present utility model and good effect are: it has simple and easy to do lockmaking mechanism and reliable anti-theft feature, thereby helps the maintenance management and the safety guarantee of underground installation.

Claims

A kind of Cover for blind drain, it is characterized in that: the center at its lid (3) has keyhole, the latch gear of inserting to well head sidewall (14) is housed below this keyhole, and this latch gear is swallowed sth. raw and whole piece (5), arc shift fork (6), the horizontal linkage formed of arm-tie (8), bolt (11) and connector (9) thereof and dead bolt (13) by wedge shape; The upper end of described arc shift fork (6) is engaged in the sliding rail groove of swallowing sth. raw and whole piece (5), the center of this arc shift fork (6) is hinged by means of pivot pin and the shift fork post (4) that is fixed on the lid (3), the lower end of arc shift fork 6 is hinged with horizontal arm-tie (8) one ends, and the other end of horizontal arm-tie (8) joins with dead bolt 13 through lintel 10 by means of bolt 11.