CN2204820Y - Manhole cover against theft - Google Patents

Abstract

The utility model relates to an anti-theft safety device for manhole covers of well mouths of underground fiber optic cables of post telephone and telegraph communication, urban underground water supply and discharge pipelines, gas pipelines, power cables, etc. The utility model is mainly formed by that a lock body with an anti-theft protection plate is arranged on the back face of a manhole cover, and a special opening key is provided. The lock body is composed of a lock seat, a locking pin, a connecting rod, a locking pin seat, etc. which are fixedly arranged at the inner side of the manhole cover. The key is mainly composed of a key rod which can rotate a key tongue, and a spring push rod in the key rod. Compared with the prior art, the utility model has the advantages of reasonable structure, fastness, reliability and easy use and fundamentally solves the problems of theft protection, rust protection, guard and blockage resistance of manhole covers of urban underground installations.

Description

Manhole cover against theft

The utility model relates to a kind of city underground water supply and drainage, the safe antitheft protective device of all trades and professions missile silo facilities such as post and telecommunications, power cable, well head well lid.

At present, all kinds of missile silo facilities in the urban construction, as communication, power cable, pipeline valves etc. are frequently taken place by the incident that the lawless person destroys, steals, cause communication, blackout, pipe leakage, the Pedestrians and vehicles serious accidents such as well injures and deaths that fall, become society's one big " public affairs " evil, bring massive losses for national economic development and people's lives and properties.The prior art that solves this class problem roughly has two kinds of forms: the firstth, well lid and wellhead receptacle are screwed; Second kind is to install various locksets on well lid additional, and its common shortcoming is that easy-to-rust, dirt easily stop up, and antitheft barrier propterty is poor, uses inconvenience, and practicality is not strong, thereby is difficult for promoting.

Goal of the invention of the present utility model is to overcome above-mentioned the deficiencies in the prior art part just and provides a kind of rational in infrastructure, easy to operate, has the well lid safe antitheft protective device of four anti-functions such as antitheft, antirust, protection, anti-clogging.

Goal of the invention of the present utility model can take following technical measures to be achieved: the anti-theft security manhole lid device of being made up of well lid, wellhead receptacle, pattern manhole cover lock three parts, central authorities at well lid are provided with keyhole, in wellhead receptacle,, and the well lid safety lock is housed in the back side and the same axle center of keyhole of well lid along the lockpin hole that is shaped on of diametric(al) symmetry; Be that lock (5) fixedly is loaded on the well lid inboard by screw (1), two locking pin seat (11) are installed on the diametric two ends of well lid respectively symmetrically; One rotatable baffle plate (2) and hollow shaft (4) are housed at the key port place of lock (5) simultaneously, and a pair of backing pin (3) is contained in the outside, bottom of hollow rotating shaft (4) again symmetrically; The two ends of two connecting rods (7) are connected with lock pin (9) in being contained in locking pin seat (11) with pin (6), (8) and hollow rotating shaft (4) respectively, and on two lock pins (9) spring (10) are housed all.

Open the utility model and be furnished with private key, its design feature is in the central authorities of handle (22) shroud (23) to be housed, one end of hollow key bar (17) is contained in the shroud (23), the other end links to each other with key tongue (21) by bearing pin (20), pressure cap (24) is contained in shroud (23) center of top, push rod (18) is housed in hollow key bar (17), spring (15) is equipped with in the upper end of push rod (18), and join by carriage (16) and pressure cap (24), the lower end of push rod (18) contacts with key tongue (21).

Accompanying drawing and drawing explanation:

Fig. 1 is the utility model locked state schematic diagram;

Fig. 2 is the BOB cross-sectional view of the utility model Fig. 1;

Fig. 3 is the A-A sectional structure schematic diagram of the utility model Fig. 1;

Fig. 4 is for opening private key structural representation of the present utility model;

Fig. 5 is the key tongue deadweight hang schematic diagram of the utility model private key;

Fig. 6 is that the A of the utility model private key Fig. 4 is to schematic diagram;

Wherein:

1-screw 2-plate washer

3-backing pin 4-hollow rotating shaft

5-lock 6-pin

7-connecting rod 8-pin

9-lock pin 10-spring

11-locking pin seat 12-wellhead receptacle

13-well lid 14-keeps off pad

15-spring 16-carriage

17-key bar 18-push rod

20-bearing pin 21-key tongue

22-handle 23-shroud

The 24-pressure cap

The utility model advantage compared to existing technology is apparent: owing to be provided with the lock body structure with anti-theft plate below well lid, lock pin is under the spring pressure effect, general improper instrument is difficult for touching plate washer, the shelves pin on the hollow rotating shaft, even stir, also be difficult for overcoming spring force and transfer to lock pin. And the key tongue vertically inserts in the keyhole by gravity, and horizontal inversion is upwards carried just can be affiliated to shelves pin, structure uniqueness; Experiment shows the utility model locking pin seat fixture under external force acts on by force, can bear 4.5 tons of pulling force, and lock pin can bear 4.8 tons of shearing forces. In sum, make to the utlity model has easy for operationly, solid and reliable, can play good antitheft, antirust, protection, anti-clogging four big functions.

Embodiment: this manual the 5th part is the clear the technical solution of the utility model of intactly having described of 1-6 in conjunction with the accompanying drawings.Here no longer repeat.What need supplementary notes is that private key is to open key of the present utility model.Its action principle is, the key tongue is pushed plate washer earlier aside by the vertical keyhole that inserts of deadweight, under the effect of stage clip mechanism, reverse 90 ° and be in a horizontal position, on carry key, " tongue " and hollow rotating shaft overside pin contacts, at this moment screw key, promote the hollow shaft pivot link, drive lock pin and stretch, realize that well lid opens and closes.

The utility model also can cover at the missile silo that uses that is completed, existing field boundary transformation is installed, and can avoid the stolen loss that causes of well lid equally.

Claims (2)

1, a kind of anti-theft security manhole lid device, form by well lid, wellhead receptacle, pattern manhole cover lock, it is characterized in that: the keyhole of establishing in the central authorities of well lid, along the lockpin hole that is provided with of diametric(al) symmetry, and be equipped with the well lid safety lock in the back side and the same axle center of keyhole of well lid in wellhead receptacle; That is: lock (5) fixedly is loaded in the well lid by screw (1) and surveys, and two locks (11) are installed on the diametric two ends of well lid respectively symmetrically; One rotatable baffle plate (2) and hollow rotating shaft (4) are housed at the key port place of lock (5) simultaneously, and a pair of backing pin (3) is contained in the outside, bottom of hollow rotating shaft (4) again symmetrically; The two ends of two connecting rods (7) are connected with lock pin (9) in being contained in locking pin seat (11) with pin (6), (8) and hollow rotating shaft (4) respectively, and on two lock pins (9) spring (10) are housed all.

2, a kind of special key of opening the described anti-theft security manhole lid device of claim 1 that is exclusively used in, it is characterized in that: shroud (23) is housed in the central authorities of handle (22), one end of hollow key bar (17) is contained in the shroud (23), the other end links to each other with key tongue (21) by bearing pin (20), pressure cap (24) is contained in shroud (23) center of top, push rod (18) is housed in hollow key bar (17), spring (15) is equipped with in the upper end of push rod (18), and join by carriage (16) and pressure cap (24), the lower end of push rod (18) contacts with key tongue (21).

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