CN2883494Y

CN2883494Y - Rotary-opening antitheft well cover and special opening tool

Info

Publication number: CN2883494Y
Application number: CN 200620050604
Authority: CN
Inventors: 沈友良
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-08
Filing date: 2006-04-08
Publication date: 2007-03-28
Anticipated expiration: 2016-04-08

Abstract

The utility model discloses an unscrewing burglarproof well cover and dedicated tool, which comprises a well frame and a cover, and is characterized in that two to six convex chutes of well frame are arranged on the inner edge and two to six convex chutes of well cover on the outer edge of the well cover, the convex chutes of well frame match with the convex chutes of well cover, and two holes for opening the cover are arranged in the well cover. The utility model is also characterized in that a driven-in pin for opening the cover is arranged at one end of the pole support and an opening handle is arranged at the other end of the pole support. The utility model has the advantages that: by being built in cast iron, matching chutes are arranged on the well frame and cover; the well cover is arranged on the well frame, which can be tightened via the matching chutes and is hard to be opened without the dedicated opening tool; therefore, good burglarproof efficiency, simple structure and low cost and convenience for popularization are all guaranteed.

Description

The type of outwarding winding anti-stealing manhole cover and special opening instrument

Technical field

The utility model relates to a kind of anti-stealing manhole cover.

Background technology

Use at present is stolen easily at sewer well lid and network of underground maintenance and inspection mouth well lid, and pedestrian and the vehicle of passing by this place are fallen in the well, causes personnel's injury and property loss, though some anti-stealing manhole covers also appearred in market, but since complex structure, the cost height, and do not obtain promoting.

The utility model content

The purpose of this utility model provides a kind of simple in structure, the anti-stealing manhole cover that cost is low.

The purpose of this utility model realizes in the following way: a kind of type anti-stealing manhole cover of outwarding winding, comprise walling crib and well lid, the walling crib projection skewed slot that the 2-6 bar is arranged on the face of the inside edge of walling crib, 2-6 bar well lid projection skewed slot is also arranged on the outer edge surface of well lid, walling crib projection skewed slot matches with well lid projection skewed slot, at well lid two well lid open holes is arranged.

A kind of type anti-stealing manhole cover special opening tool of outwarding winding has two well lid open holes to insert pin at an end of pole, at the other end of pole the unlatching handle is arranged.

The utlity model has following beneficial effect, owing to adopt Cast Iron Production, be provided with the skewed slot that matches on walling crib and well lid, well lid is installed on the walling crib, can screw by the skewed slot that matches, if do not use the special opening instrument, be difficult to open, so good anti-theft effect, because the utility model is simple in structure, cost is low, is promoted the use of easily.

Description of drawings

Fig. 1 is a vertical view of the present utility model;

Fig. 2 is the utility model cross section view;

Fig. 3 is the cross section view of the utility model walling crib;

Fig. 4 is the vertical view of the utility model walling crib;

Fig. 5 is the vertical view of the utility model well lid;

Fig. 6 is the lateral view of the utility model well lid;

Fig. 7 is a special tool of opening well lid;

Below in conjunction with accompanying drawing the utility model is described further:

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6: a kind of type anti-stealing manhole cover of outwarding winding, comprise walling crib 1 and well lid 2, the walling crib projection skewed slot 4 that the 2-6 bar is arranged on the face of the inside edge of walling crib 1,2-6 bar well lid projection skewed slot 5 is also arranged on the outer edge surface of well lid 2, walling crib projection skewed slot 4 matches with well lid projection skewed slot 5, at well lid 2 two well lid open holes 3 is arranged.

Shown in Fig. 7 institute, a kind of type anti-stealing manhole cover special opening tool of outwarding winding has two well lid open holes to insert pin 6 at an end of pole 7, at the other end of pole 7 handle 8 of unlatching is arranged.

Using method of the present utility model is, after being installed to well lid 2 on the walling crib 1, by special tool with the well lid that matches projection skewed slot 5 and walling crib projection skewed slot 4 well lid 2 being installed on the walling crib 1 tightly, because the utility model is to adopt Cast Iron Production, weight is bigger, do not having under the situation of special tool, be difficult to open well lid, so good anti-theft effect.

Claims

1, a kind of type anti-stealing manhole cover of outwarding winding, comprise walling crib [1] and well lid [2], it is characterized in that: the walling crib projection skewed slot [4] that the 2-6 bar is arranged on the inside edge face of walling crib [1], 2-6 bar well lid projection skewed slot [5] is also arranged on the outer edge surface of well lid [2], walling crib projection skewed slot [4] matches with well lid projection skewed slot [5], at well lid [2] two well lid open holes [3] is arranged.

2, a kind of type anti-stealing manhole cover special opening tool of outwarding winding is characterized in that: have two well lid open holes to insert pin [6] at an end of pole [7], at the other end of pole [7] unlatching handle [8] is arranged.