CN2571831Y

CN2571831Y - Anti-theft fastener for cover of mamhole

Info

Publication number: CN2571831Y
Application number: CN 02267187
Authority: CN
Inventors: 陆文俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-12
Filing date: 2002-09-12
Publication date: 2003-09-10
Anticipated expiration: 2012-09-12

Abstract

The utility model relates to a theftproof fastener for a manhole cover. More than two screw bolts are uniformly distributed and fixed on a manhole cover seat, shoulder stopping casing tubes matched with the screw bolts on the manhole cover seat are arranged on the manhole cover, and convex rings are arranged in the shoulder stopping casing tubes. Shaped screw nuts are screwed in the screw bolts via the shoulder stopping casing tubes and supported on the convex rings on the shoulder stopping casing tubes, protective screw caps are arranged at the shoulder stopping openings of the shoulder stopping casing tubes. The utility model having the advantages of simple structure, convenient installation and operation, high safety and favorable theftproof performance due to the adoption of the special shaped screw nuts and a matched impact wrench for fixation and opening, flexible use and long service life, and shoulder stopping casing tubes the fastener is not easy to rust since anticorrosion lubricant is filled in the shoulder stopping casing tubes.

Description

Inspection shaft covers thief-proof fastener

Technical field

The utility model relates to a kind of fastener of inspection shaft lid.

Background technology

At present, stolen in order to prevent steel inspection shaft lid, a kind of method is that steel inspection shaft lid is provided with the lockset locking, but the most structure of this class lock device is complicated, and corrosion resistance is poor, and application life is shorter; Another kind method is that steel inspection shaft lid is replaced as the not steel concrete inspection shaft lid of with locking mechanism, makes it lose the value that stealing is sold off, but it is moved by sled easily, thereby pipelines such as the communication cable of down-hole, cable are caused potential safety hazard.

Summary of the invention

The technical problem that the utility model quasi-solution is determined is, for overcoming the shortcoming that above-mentioned inspection shaft lid exists, and provides a kind of simple in structure, locking, opens all conveniently, and Corrosion Protection is good, long service life, and solid and reliable inspection shaft covers thief-proof fastener.

Technical design scheme of the present utility model is: at the uniform bolt of fixing more than two on the Seat for manhole cover, inspection shaft covers installs the shoulder stopping casing that matches with bolt on the Seat for manhole cover, be provided with protruding circle in the shoulder stopping casing, special-shaped nut screws in bolt by shoulder stopping casing and is pressed on the protruding circle of shoulder stopping casing, at the shoulder stopping port of shoulder stopping casing the protection blind nut is installed.

Technique effect of the present utility model: overall structure is simple, and is easy to install, and fix and open because of adopting special special-shaped nut and supporting box spanner, thereby safer reliable, theft-proof is good; In shoulder stopping casing, fill anti-corrosion grease simultaneously, be difficult for corrosion, long service life.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1.

Fig. 2 is the structural representation of the utility model embodiment 2.

The specific embodiment

Embodiment 1, Seat for manhole cover 2 is brick-work base or concreting seat, two upright openings of symmetrical ground auger on this Seat for manhole cover 2, two expansion bolts that constitute by expansion tube 3, bolt 4, plain washer 5, spring washer 6 and clamp nut 7 (bolt 4 also can be made right angle type or 135 ° of dihedrals and water in advance and be embedded in the Seat for manhole cover 3, and bolt head is got final product vertically upward) have been installed and fixed; Inspection shaft lid 1 is the coagulation earth mulch by angle steel 16 bound edges, offer on this inspection shaft lid 1 two with Seat for manhole cover 2 on bolt 4 corresponding holes, in two holes, insert shoulder stopping casing 8 respectively, be provided with protruding circle 15 in the shoulder stopping casing 8, be placed with packing ring 9 on the protruding circle, special-shaped nut 10 usefulness special sleeve spanners screw in bolt 4 by shoulder stopping casing 8, so inspection shaft lid 1 has just tightened together with Seat for manhole cover 2; Put packing ring 13 at the shoulder stopping port of shoulder stopping casing 8 again, the protection blind nut 12 of screwing on can prevent in rainwater, the dust intrusion shoulder stopping casing 8; If in the space of shoulder stopping casing 8, fill anti-corrosion grease 14, then can further prevent the securing member rust corrosion, in the application life of favourable prolongation securing member, help locking easily flexibly and opening the inspection shaft lid; Between protection blind nut 12 and bolt 4 tops, install stage clip 11 in addition, then can prevent becoming flexible because of inspection shaft lid pressurized vibration causing protection blind nut 12.

Embodiment 2, and Seat for manhole cover 2 is the steel seat, and then bolt 4 can be bent into right angle type, fixedly connected with the sidewall of steel Seat for manhole cover 2, and its end of thread vertically upward; Inspection shaft lid 1 also be thin steel lid, then shoulder stopping casing 8 insert offered on the inspection shafts lid 1 with bolt 4 corresponding holes after, preferably fixing in advance, for example at the shoulder stopping casing 8 system external screw thread of getting on the bus, promptly available packing ring 18, nut 17 cover 1 with inspection shaft and fix; All the other structures with

Embodiment 1 is identical.

Claims

1, a kind of inspection shaft covers thief-proof fastener, it is characterized in that the upward uniform bolt (4) that is fixed with more than 2 of Seat for manhole cover (2), the shoulder stopping casing (8) that matches with bolt (4) on the Seat for manhole cover (2) is installed on the inspection shaft lid (1), be provided with protruding circle (15) in the shoulder stopping casing (8), special-shaped nut (10) screws in bolt (4) by shoulder stopping casing (8) and is pressed on the protruding circle (15) of shoulder stopping casing, is equipped with at the shoulder stopping port of shoulder stopping casing (8) and protects blind nut (12)

2, cover thief-proof fastener by the described inspection shaft of claim 1, the bolt (4) that it is characterized in that being fixed on the Seat for manhole cover (2) is the expansion bolt that is made of expansion tube (3), bolt (4), plain washer (5), spring washer (6) and clamp nut (7).

3, cover thief-proof fastener by the described inspection shaft of claim 1, it is characterized in that between the protection blind nut (12) of shoulder stopping casing (8) and bolt (4) top stage clip (11) being installed.

4, cover thief-proof fastener by the described inspection shaft of claim 1, it is characterized in that being full of anti-corrosion grease (14) in the space of shoulder stopping casing (8).