CN200964594Y

CN200964594Y - Anti-theft cover for manhole

Info

Publication number: CN200964594Y
Application number: CN 200620109162
Authority: CN
Inventors: 厉惠良
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2007-10-24
Anticipated expiration: 2016-10-26

Abstract

The utility model relates to a theft-proof manhole cover, consisting of a cover body and a cover base, wherein, the inner wall of the cover base is provided with a convex ring shield ring, the reverse side of the center hole on the cover body is provided with an expanding and blocking device which is composed of a detachment and combination ring, a spring connecting the detachment and combination ring, a swivel, a swivel fixing catch, an expansion stay bar and a return spring, wherein, one end of every ring of the detachment and combination ring is articulated with the cover body while the other end is connected with the articulating head of another ring by the link spring, the swivel is blocked on the reverse side of the cover body by the swivel fixing catch, the inner wall has a pin hole in the radial direction, on end of the expansion stay bar is articulated with the detachment and combination ring section and the swivel; the matched unlock item consists of a prismatical body with a tongue hole cut on the wall surface of the lower end, an extraction and tension spanner which is connected with the upper part, a rotating thumb screw which is passed and sleeved with the prismatical body from the center, a matched smooth tongue, a return spring of the smooth tongue and a close cover which is on the lower part. The theft-proof manhole cover has the advantages of simple structure, ingenious conception, good theft-proof effect, convenient locking and opening and difficult vulnerableness.

Description

Anti-stealing manhole cover

Technical field

The utility model belongs to road underground structure supporting facility, specifically a kind of anti-stealing manhole cover.

Background technology

As everyone knows, on different kinds of roads such as city, all be equipped with water supply, steam supply, sewage, communication, cable pipeline, these pipelines are equipped with the maintenance and the cleaning manhole of logical upper ground surface at a distance of a segment distance, be commonly called as and be inspection shaft, the lid of inspection shaft generally is with metal, because many inspection shafts are positioned on the road.If the impact force that lid is lost or cross because of vehicle causes it and jumps out, is shifted, very easily endanger vehicle and pedestrian's safety.

The utility model content

The purpose of this utility model is to provide a kind of anti-stealing manhole cover that bloated card device is arranged.

The concrete mode that realizes the technical solution of the utility model is such: at original lid, on the inspection shaft basis that cage is formed, the back-up ring of a bulge loop formula is set at the cage inwall, open a centre bore in the lid center, reverse side is provided with the bloated card device of a cover, should expand card device by separating and joining ring, separating and joining ring connects spring, change, the fixing card of change, strut expands, return spring is formed, separating and joining ring is at least two sections, one end of every section ring is articulated on the lid, the other end is a free end, the free end that encircles the last period is by the hinged end of back one section ring, each encircles intersegmental by connecting the spring connection, change is concentric with centre bore, be located at the lid reverse side, the inwall upper edge diametric(al) symmetry of change has a pair of pin-and-hole, and expand strut one end and the separating and joining ring section hinge other end and change are hinged; Also having this bloated card device also to mate has special-purpose opening tool, this opening tool is by the cylindrical body that has two symmetrical tongue holes on the wall of lower end, be connected in the spanner that lifts on top, be set in the rotation pin in the cylindrical body from the center, the sliding-tongue that is complementary, the capping of sliding-tongue return spring and bottom constitutes, sliding-tongue is opposingly to have groove to two that are provided with towards this face of rotation pin, corresponding return spring also is two, the cylindrical body bottom matches with the lid centre bore, pin-and-hole is complementary on sliding-tongue piece and the lid reverse side change inwall, rotation pin end is arranged with two projections at the diameter place, this two projection is stretched in the groove on the sliding-tongue, capping is connected with the rotation pin, also have on its flange with cylindrical body on corresponding tongue hole.

Anti-stealing manhole cover of the present utility model, simple in structure, be skillfully constructed, good anti-theft effect, pintle hook lock is convenient, not fragile with unlatching.

Description of drawings

Fig. 1 is the front view of embodiment well lid of the present utility model when covering

Fig. 2 is the sectional view of embodiment well lid of the present utility model when covering

Fig. 3 is that embodiment well lid of the present utility model covers the sectional view of opening tool when inserting

Fig. 4 is the front view of embodiment opening tool of the present utility model

Fig. 5 is the A-A sectional view of embodiment opening tool of the present utility model

The specific embodiment

Below in conjunction with embodiment the utility model is further described, following embodiment only is used to illustrate the technical solution of the utility model, but to not restriction of the utility model.

Embodiment

As shown in Fig. 1 to 5, anti-stealing manhole cover of the present utility model, comprise manhole cover base 1, well lid 2, card device 3 expands, the inwall of manhole cover base 1 is provided with the bulge loop 11 of back-up ring formula, the center of well lid 2 has centre bore 21, reverse side is connecting bloated card device 3, should expand card device 3 by separating and joining ring 31, separating and joining ring connects spring 32, change 33, the fixing card 34 of change, the strut 35 that expands is formed, separating and joining ring 31 is two

sections

31a and 31b, the last end of ring section 31a is articulated on the lid 2, the other end is a free end, the last end of ring section 31b also is articulated on the lid 2, the other end is a free end, form the spread pattern that the free end that encircles 31a the last period is close to the hinged end of back one section ring 31b like this, and respectively encircle and intersegmentally link together by connecting spring 32, change 33 is concentric with centre bore 21, be located at lid 2 reverse side, the ring wall upper edge diametric(al) symmetry of change 33 has a pair of pin-and-hole 33a, the fixing card 34 of change is " U " shape, be connected on the lid 2 across change 33, bloated strut 35a one end and the separating and joining ring section 31a hinge other end and change 33 are hinged, and expand strut 35b one end and the separating and joining ring section 31b hinge other end and change 33 are hinged; From figure, also can find out, bloated card device also mates special-purpose opening tool 4, this opening tool 4 is by the cylindrical body 41 that has two symmetrical tongue hole 41a on the wall of lower end, what be connected in cylindrical body 41 tops lifts spanner 42, be set in the rotation pin 43 in the cylindrical body 41 from the center, the sliding-tongue 44 that is complementary, the capping 46 of sliding-tongue return spring 45 and bottom constitutes, sliding-tongue 44 is opposing to two that are provided with, sliding-tongue 44 has groove 441 towards rotation pin 41 these faces, corresponding return spring 45 also is two, cylindrical body 41 bottoms match with lid centre bore 21, pin-and-hole 33a is complementary on sliding-tongue 44 and lid 2 reverse side changes 33 inwalls, rotation pin 41 ends are arranged with two projection 41a at the diameter place, this two projection 41a is stretched among the groove 441 on the sliding-tongue, capping 46 is connected with rotation pin 41, and the pin-and-hole 33a and the projection 41a that are offered in the change 33 that the reverse side of well lid 2 is connecting are complementary.

When covering, the sliding-tongue 44 of opening tool 4 is threaded to the state of retraction cylindrical body 41, hold then and lift spanner 42 in the centre bore 21 of cylindrical body 41 bottoms insertion well lid 2, rotate rotation pin 43, sliding-tongue 44 is stretched out enter among the pin-and-hole 33a that the ring wall upper edge diametric(al) symmetry of the change 33 of well lid 2 reverse side offers, at this moment, carry and just well lid 2 is mentioned in the lump when carrying opening tool 4 and move in the manhole cover base 1, rotate then and lift spanner 42, driving change 33 rotates, the bloated strut 35 that is hinged like this in change 33 is released separating and joining ring 31 by interlock toward the circle outside, make it embed the position of bulge loop 11 belows of the back-up ring formula of manhole cover base 1, promptly well lid 2 has been stuck with manhole cover base 1.Rotate the rotation pin 43 on the opening tool 4, sliding-tongue 44 is threaded in the withdrawal cylindrical body 41, extract opening tool 4 and get final product.

When uncapping, sliding-tongue 44 has been in the opening tool 4 of retraction state, insert in the centre bore 21 of well lid 2, rotate rotation pin 43, sliding-tongue 44 is stretched out enter among the pin-and-hole 33a that the ring wall upper edge diametric(al) symmetry of the change 33 of well lid 2 reverse side offers, rotate then and lift spanner 42, driving change 33 rotates, the bloated strut 35 that is hinged like this in change 33 is got back to the original place by interlock with separating and joining ring 31, do not had obstacle between well lid 2 and the manhole cover base 1 this moment, carries to lift and carry on the spanner 42 and can shift out well lid 2.

Claims

1, a kind of anti-stealing manhole cover, comprise lid, cage, it is characterized in that: described cage inwall is provided with bulge loop, the lid center has centre bore, reverse side is provided with bloated card device, described bloated card device is by separating and joining ring, separating and joining ring connects spring, change, the fixing card of change, strut expands, return spring is formed, separating and joining ring is at least two sections, one end of every section ring is articulated on the lid, the other end is a free end, the free end that encircles the last period is by the hinged end of back one section ring, each encircles intersegmental by connecting the spring connection, and change is concentric with centre bore, is located at the lid reverse side, the inwall upper edge diametric(al) symmetry of change has a pair of pin-and-hole, and the strut two ends of expanding connect separating and joining ring section and change respectively.

2, anti-stealing manhole cover as claimed in claim 1, it is characterized in that: described bloated card device also mates opening tool, this opening tool is by the cylindrical body that has two symmetrical tongue holes on the wall of lower end, be connected in the spanner that lifts on top, be set in the rotation pin in the cylindrical body from the center, the sliding-tongue that is complementary, the capping of sliding-tongue return spring and bottom constitutes, sliding-tongue is opposingly to have groove to two that are provided with towards this face of rotation pin, corresponding return spring also is two, the cylindrical body bottom matches with the lid centre bore, pin-and-hole is complementary on sliding-tongue piece and the lid reverse side change inwall, rotation pin end is arranged with two projections at the diameter place, this two projection is stretched in the groove on the sliding-tongue, capping is connected with the rotation pin, also have on its flange with cylindrical body on corresponding tongue hole.