CN2232055Y - Double protective cover for manhole shaft - Google Patents

Abstract

The utility model discloses a double protective manhole cover which can prevent a manhole cover from missing or being stepped over by pedestrians and pressed over by cars. The double protective manhole cover is characterized in that a positioning card and a spring lock are arranged on the edges of two radial lines which are vertical with each other on the manhole cover; the positioning card and the spring lock interact with a concave port and a locking hole on the edge of a manhole mouth; the lock bolt of the spring lock is installed on the lower side of the manhole cover and is supported by two pressing plates; corresponding long holes are arranged on the lock bolt and the manhole cover; the lock bolt can be pulled by a special double L-shaped key to move along the manhole cover in the radial direction. When the key is pulled down, the lock bolt resets under the function of spring force. Thus, the manhole cover is locked firmly, and the utility model obtains antitheft and anti turn over functions.

Description

Double protective cover for manhole shaft

The utility model relates to a kind of well lid, in particular for communal facilitieies such as water, coal gas, cable can antitheft, the anti-Double protective cover for manhole shaft that turns over up and down.

Being used for up and down at present, the casting iron well lid of communal facilitieies such as water, coal gas, cable generally adopts well lid directly to cover at well head, there is not locked instrument between well lid and the well head, the stolen phenomenon of well lid often takes place, cause the national wealth loss and cause danger for pedestrian, vehicular traffic, in addition because well lid and well head combination are not tight, the pedestrian steps on and turns over or the phenomenon of vehicle pressure well lid also happens occasionally, and this causes danger for too pedestrian or vehicular traffic.

The purpose of this utility model provides a kind of Double protective cover for manhole shaft, and it can prevent that well lid is stolen and be stepped on by the pedestrian and to turn over or by the vehicle pressure.

For achieving the above object, the solution that the utility model adopts is, on the edge, two ends of orthogonal two diameters on the well lid, be provided with locator card and bullet lock, correspondence is provided with recess and lockhole on the shaft mouth side edge, the structure of bullet lock is: the straight slot that has of well lid upper edge radial line, two supporting plates are housed at the two ends in hole under the well lid, dead bolt is housed between supporting plate, have the same holes corresponding on the dead bolt with the oblong aperture on the well lid, by well lid along being respectively equipped with spring and mentioning on the supporting plate of an end and on the dead bolt, both ends of the spring is hung in to be mentioned, the dead bolt outer end exceeds the well lid edge under the elastic force effect of spring, and fill-in well reaches the purpose of locking well lid along last lockhole, need when uncapping well lid to hook well lid simultaneously with stirring dead bolt inwards in the double L-shaped key insertion hole of special use.

Owing to adopted locator card in the above-mentioned solution and played lock construction, can prevent from effectively that well lid from losing to step on the pedestrian to turn over or vehicle pressure well lid, both can guarantee the traffic safety of Pedestrians and vehicles, can reduce the national wealth loss again.

To closing drawings and Examples the utility model is described in further detail below.

Fig. 1 is the structural representation of the utility model Double protective cover for manhole shaft;

Fig. 2 is the structural representation of the bullet lock of the utility model Double protective cover for manhole shaft;

Fig. 3 is a Double protective cover for manhole shaft shown in Figure 1 sectional view along A-A line.

At Fig. 1---in the structural representation shown in Figure 3, be respectively equipped with on the edge, two ends of the radial line of well lid 1 and well lid 1 locator card 2 cast in block, well head is provided with corresponding recess 4 along 3, the straight oblong aperture 5 that has on the radial line of well lid 1 perpendicular to the line of two locator cards 2, the two ends of oblong aperture 5 are respectively equipped with pressing plate 6 and dead bolt 7 below the well lid 1, by on the pressing plate 6 of well lid 1 edge one side and dead bolt 7 be provided with and mention, the two ends of spring 8 are hung in mentions, have on the dead bolt 7 with well lid 1 on oblong aperture 5 corresponding identical holes, well head has lockhole 9 along corresponding dead bolt 7 on 3.

Need when uncapping well lid with stirring dead bolt 7 inwards in the oblong aperture 5 on the double L-shaped key insertion of the special use well lid 1, hook well lid when opening, pull up key during lid, dead bolt 7 inserts under the elastic force effect of spring 8 in the lockhole 9 of well head on along 3, with locator card 2 actings in conjunction in well head along 3 on, reach antitheft, the anti-effect of turning over.

Claims (1)

1, a kind of antitheft anti-Double protective cover for manhole shaft that turns over, it is characterized in that: the end of last orthogonal two radial lines of well lid (1) along on be respectively equipped with locator card (2) and bullet lock, the dead bolt (7) that well head is gone up corresponding locator card (2) and bullet lock along (3) is provided with recess (4) and lockhole (91), dead bolt (7) and the straight direction of well lid (1) upper edge radial line have corresponding oblong aperture (5), dead bolt (7) is held by pressing plate (6), can be along the moving radially of well lid 1, the two ends of spring (8) are hung in the spring of dead bolt (7) and pressing plate (6) and mention.

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