CN201024428Y

CN201024428Y - Anti-theft manhole cover and its dedicated opening tool

Info

Publication number: CN201024428Y
Application number: CNU200720011693XU
Authority: CN
Inventors: 齐宝华
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-12
Filing date: 2007-04-12
Publication date: 2008-02-20
Anticipated expiration: 2017-04-12

Abstract

The utility model relates to a theft proof well lid and a special opening tool. The theft proof well lid consists of a well ring and a well lid that are mutually articulated. The special points of the utility model lie in that: a casing is arranged at the corresponding place far away from an articulated point between the well ring and the well lid and provided with a spring and a lockpin which is inserted into the well ring; the lower part of the place where the lockpin is inserted in the well ring takes the shape of steps, the lower surface of the well lid corresponding to the lockpin is provided with a standing plate, the lower part of which corresponding to the lockpin is provided with a locking crank piece, a corresponding surface of the locking crank piece to the lockpin is an inclined plane and a keyhole is arranged on the well lid close to the standing plate. The special opening tool for the well lid comprises an approach slab which is provided with an axle sleeve and a radar tube, the axle sleeve is provided with an L-shaped shift lever, the end of which is introduced by an approach slab and is provided with a handle and the other end protrudes upwards and pushes against a radar tube. The utility model has the advantages of good theft proof effect, greatly improving safety of the theft proof well lid, antihunt action, simple structure, convenient operation, low cost and high reliability.

Description

Anti-stealing manhole cover and special opening instrument thereof

Technical field

The utility model is particularly related to a kind of anti-stealing manhole cover and special opening instrument thereof.

Background technology

Existing well lid does not have anti-theft feature mostly, is easy to stolen.Though some well lid is provided with anti-theft device, anti-theft device is too simple, and anti-theft effect is poor, does not have antitheft effect at all.Though some antitheft good anti-theft effect, well lid structure are too complicated, cost height, inconvenient operation, and poor reliability.

Summary of the invention

The purpose of this utility model is to solve the problems referred to above that prior art exists, and a kind of good anti-theft effect is provided, and is safe in utilization, simple in structure, easy to operate, anti-stealing manhole cover that cost is low, reliability is high and special opening instrument thereof.

The utility model is achieved in that it has a walling crib and well lid, hinged therebetween, its special character is: installed sleeve pipe with the contraposition far away of well lid pin joint on walling crib, in sleeve pipe, be provided with spring and lock pin, described lock pin stretches in the walling crib, the bottom that lock pin inserts the inner position of walling crib is stepped, the place is provided with riser at the corresponding lock pin of well lid soffit, be provided with lock dog in riser bottom and lock pin opposite face, described lock dog and lock pin opposite face are the inclined-plane that cooperatively interacts, and are provided with lockhole near the riser place on well lid.

Above-mentioned anti-stealing manhole cover, described lockhole both sides are circular.

A kind of anti-stealing manhole cover special opening instrument, comprise attachment strap, its special character is: on attachment strap, be provided with axle sleeve and positioning pipe, L shaped driving lever be installed in axle sleeve, described driving lever one end by the attachment strap upper surface draw and be equipped with handle, the other end is to upper process and lean on positioning pipe.

Above-mentioned anti-stealing manhole cover special opening instrument, the cross section of the opposite position of described positioning pipe and driving lever are semicircle and coincide each other.

The utility model has the advantages that: owing to adopt L shaped driving lever to be provided with riser as unlocking tool and at the well lid soffit, after screwing, opener just can unblank, therefore, and good anti-theft effect, have only and use special-purpose opener just can unblank, improve the safety of anti-stealing manhole cover greatly.Because during locking, lock pin is stuck on the lock dog, closely overlap therebetween, can play antihunt action, and simple in structure, easy to operate, cost is low, reliability is high.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the opener structural representation;

Fig. 4 is the right view of Fig. 3;

Fig. 5 is the vertical view of Fig. 3;

Fig. 6 is a view behind the anti-stealing manhole cover insertion special opening instrument.

Among the figure: walling crib 1, riser 101, cover plate 102, well lid 2, lockhole 201, sleeve pipe 3, spring 4, lock pin 5, riser 6, lock dog 7, attachment strap 8, handle 9, driving lever 10, positioning pipe 11, axle sleeve 12.

The specific embodiment

As Fig. 1, shown in Figure 2, this anti-stealing manhole cover has a walling crib 1 and well lid 2, hinged therebetween, on walling crib 1 outer rim, installed riser 101 with the contraposition far away of well lid 2 pin joints, on riser 101, be provided with sleeve pipe 3, on two adjacent on riser 101 and the walling crib 1 muscle, be welded with cover plate 102 with riser 101, in sleeve pipe 3, be provided with spring 4 and lock pin 5, described lock pin 5 stretches in the walling crib 1, the bottom that lock pin 5 inserts position in the walling crib 1 is stepped and ladder is circular-arc, 5 places are welded with riser 6 at the corresponding lock pin of well lid 1 soffit, be provided with lock dog 7 in riser 6 bottoms and lock pin 5 opposite faces, described lock dog 7 is the inclined-plane that cooperatively interacts with lock pin 5 opposite faces, is provided with lockhole 201 near the riser place on well lid 2, and lockhole 201 both sides are circular.

As Fig. 3～shown in Figure 5, this anti-stealing manhole cover special opening instrument comprises strip attachment strap 8, on attachment strap 8, be welded with the axle sleeve 12 and the positioning pipe 11 of downward extension, described axle sleeve 12 and positioning pipe 11 are corresponding with lockhole 201 positions and shape on the well lid 2, L shaped driving lever 10 is installed in axle sleeve 12, described driving lever 10 1 ends by attachment strap 8 upper surfaces draw and be equipped with handle 9, the other end is to upper process and lean on positioning pipe 11, the cross section of the opposite position of positioning pipe 11 and driving lever 10 is respectively semicircle and coincide each other, so that driving lever 10 is close to, prevent displacement.

During locking, well lid 2 rotates around jointed shaft, when lock dog 7 with after inclined-plane on the lock pin 5 contact, lock dog 7 pushes up back lock pin 5, after well lid 2 covered completely, lock pin 5 ejections also were stuck on lock dog 7 upper edges, and well lid 2 is locked.When unblanking, as shown in Figure 6, opener is placed on the well lid 2, axle sleeve 12 and positioning pipe 11 aligned two mother rib lateral rotundums of lockhole 201 and be inserted into attachment strap 8 ride over well lid 2 upper surfaces, attachment strap 8 left sides lean out well lid 2, and clockwise 180 ° of turning handles 8, driving lever 10 lean and make its retraction and withdraw from lock dog 7 on the ladder of lock pin 5, lift attachment strap 8 left ends, well lid 2 is opened.

Claims

1. anti-stealing manhole cover, comprise walling crib (1) and well lid (2), hinged therebetween, it is characterized in that: go up and the contraposition far away of well lid (2) pin joint has installed sleeve pipe (3) in walling crib (1), in sleeve pipe (3), be provided with spring (4) and lock pin (5), described lock pin (5) stretches in the walling crib (1), the bottom that lock pin (5) inserts the interior position of walling crib (1) is stepped, locate to be provided with riser (6) at the corresponding lock pin of well lid (2) soffit (5), be provided with lock dog (7) in riser (6) bottom and lock pin (5) opposite face, described lock dog (7) is the inclined-plane that cooperatively interacts with lock pin (5) opposite face, goes up near riser (6) at well lid (2) and locates to be provided with lockhole (201).

2. anti-stealing manhole cover according to claim 1 is characterized in that: described lockhole (201) both sides are for circular.

3. anti-stealing manhole cover special opening instrument, comprise attachment strap (8), it is characterized in that: on attachment strap (8), be provided with axle sleeve (12) and positioning pipe (11), L shaped driving lever (10) is installed in axle sleeve (12), described driving lever (10) one ends by attachment strap (8) upper surface draw and be equipped with handle (9), the other end is to upper process and lean on positioning pipe (11).

4. anti-stealing manhole cover special opening instrument according to claim 3 is characterized in that: the cross section of the opposite position of described positioning pipe (11) and driving lever (10) is respectively semicircle and coincide each other.