CN101463608A

CN101463608A - Clip type anti-stealing manhole cover

Info

Publication number: CN101463608A
Application number: CNA200910064005XA
Authority: CN
Inventors: 郝杰锋; 买建军
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2009-01-05
Filing date: 2009-01-05
Publication date: 2009-06-24
Anticipated expiration: 2029-01-05
Also published as: CN101463608B

Abstract

The invention provides a jaw-locking-type theft-prevention inspection well lid, which comprises a well lid (1), a pawl axle (2), a pin (3) and a lid seat (4), both inner circle of the well lid (1) and the outer circle of the lid seat (4) are round, the positions close to the margins at the left and right sides of the central axis of the well lid (1) are respectively provided with a hole which is provided with an internal thread, the pawl axle (2) is arranged inside the hole, the left and right sides of the position which is close to the inner side of the central axis of the lid seat (4) and corresponds to the hole position of the well lid (1) are respectively provided with a through hole without a thread, the lower end surface of the hole is an inverted conical surface. After the well lid (1) is put into the inner circle of the lid seat (4), the jaws of the pawl axle (2) are pop out and are tightly locked on the conical surface at the lower end of the lid seat (4), the pin (3) in the pawl axle (2) can lock the jaws; the inspection well lid is simple in structure and low in manufacture cost, uses few components, the well lid and the lid seat are interlocked, therefore, the theft prevention effect is good, misplacement, overturn or falling are not caused, thus being applicable to various inspection wells.

Description

Clip type anti-stealing manhole cover

Affiliated technical field

The present invention relates to a kind of clip type anti-stealing manhole cover, belong to the manhole lid device that staple shafts such as pipeline, irrigation canals and ditches, circuit are used.

Background technology

Different at the various inspection shaft protective cover structures of usefulness at present, function, material also are not quite similar.But the profile of well lid does not change, and that generally adopts has two kinds: round or the band lug.The round inspection shaft lid that is placed on the fast traffic lane very easily breaks away from original position along with the impulse force of automobile, bring bigger hidden danger for vehicle and pedestrian.The inspection shaft that do not lock lid is stolen by the thief through regular meeting, and in a single day inspection shaft has lost the well lid that shields, will become trap at once, brings harm for vehicle and pedestrian.According to the patent gazette introduction, the inspection shaft protective cover application for a patent for invention of now domestic existing hundreds of different structure is authorized to, but that really on market, be used more widely, simple in structure, safe antitheft, be easy to make popularization seldom, therefore, propose and the inspection shaft protective cover that designs a kind of new construction has active operation significance.

Summary of the invention

Task of the present invention is that design is a kind of as at the clip type anti-stealing manhole cover described in the preamble of claim 1, the top of using this clip type anti-stealing manhole cover can solve existing inspection shaft protective cover is effectively turned over, is lost, a stolen difficult problem, for vehicle ' and pedestrian safety provide safeguard.

This task uses the scheme corresponding to the characteristic in claim 1, the

subordinate claim

1,2,3 to solve.

Here, the minimum quantity that is provided with of described jig is 2.

The invention has the beneficial effects as follows: well lid is simple in structure; appliance is few; low cost of manufacture; particularly with the well lid and the cage interlocking of jig; cooperation firmly, can not produce dislocation, dig and the phenomenon of falling; good anti-theft effect can play a very good protection to the person and property safety, is fit to various inspection shafts and promotes the use of.

Description of drawings

Below in conjunction with accompanying drawing the present invention is done introduction at length.

Fig. 1 is the clip type anti-stealing manhole cover structural representation.

Fig. 2 is the structural representation of pawl axle and pin.

Fig. 3 is the pawl axle among the embodiment 2 and the structural representation of pin.

Among the figure, 1, well lid, 2, the pawl axle, 3, pin, 4, cage.

The specific embodiment

Embodiment 1

As Fig. 1, shown in 2, clip type anti-stealing manhole cover comprises well lid (1), pawl axle (2), pin (3) and cage (4), well lid (1) outer ring and cage (4) inner ring all are circular, well lid (1) bottom is provided with reinforcing rib, the fabrication hole of anti-skidding projection that the quantity that has cap surface does not wait and confession mounting or dismounting carrying usefulness, a left side on well lid (1) central axis, respectively there is a tapped hole at submarginal position, right both sides, pawl axle (2) is housed in the hole, in the inner part with about the corresponding section, position, hole of well lid (1) through hole is arranged respectively also on cage (4) central axis, this hole is not threaded, the lower surface in hole is inverted taper seat.

Pawl axle (2) is cylindrical hollow shaft, the external diameter upper end is threaded, the lower end is the claw that has the five equilibrium open slot, claw has elasticity, open slot quantity 3-4, there are two of column ladder holes at pawl axle (2) center, between the big aperture circular cone transition face is arranged, pin (3) is to be with cone headed pin, there is the screwed hole of mounting or dismounting usefulness at the pin center, and two pawl axles of inspection shaft adapted (2) and two pins (3), pin (3) are used for locking pawl axle (2).

Specific implementation process is as follows: on-the-spot with cement etc. cage (4) outer ring base is fixed, upwards be tightened on screwed hole in from the bottom of well lid (1) threaded termination, pawl axle (2) upper end, pawl axle (2) screws the upper end, back and slightly exceeds well lid (1) 1-2 millimeter, pin (3) nose cone is put into pawl axle (2) endoporus down, knocked pawl axle (2) upper end, makes its some millimeters that inwardly close up with special-purpose anchoring instrument, because aperture, closing in rear solid end axle (2) endoporus exit has dwindled, pin (3) just can't withdraw from the endoporus of pawl axle (2) again, has avoided stolen and has torn open.Repeat same action, another pawl axle (2) also is fixed on the well lid (1), lift well lid (1) that pawl axle (2) are housed, align cage (4) and go up corresponding hole site, firmly the claw of pawl axle (2) is compressed into seat hole downwards at cage (4), claw inwardly bounces back earlier, treats that outwards ejection, claw sponson just were positioned at inverted circular cone end, cage (4) bottom again after integral body was passed a hole.The check man puts in special-purpose dismounting rod and withstands on pin (3) end in pawl axle (2) centre bore, knocks downwards with hammer, pin (3) in folding process, its circular cone cylinder props up the claw intrados of pawl axle (2) with its outside spreading, claw pawl face blocks the inverted circular cone end of jail at cage (4) fully behind the spreading, because the claw intrados is by locking, claw can not rebound voluntarily.For preventing that booties such as dust from falling into the aperture in the pawl axle (2), plastic sheet etc. can be able to be melted thing and melt and seal the aperture.When inspection shaft need overhaul or check, the maintainer will seal the aperture earlier can melt thing and remove, stretch into the aperture with the special tool that is threaded the termination again and be tightened in the center screw thread of pin (3), special tool firmly upwards revolved together with pin (3) after tightening and carry, pin (3) upwards leaves the claw intrados, the function that has been had inside resilience by the claw of locking again, well lid (1) upwards is lifted away from the seat (4) of uncapping, and the staff just can go into the well and overhaul.

Embodiment 2

See Fig. 3, embodiment 2 revises pawl axle (2) ladder endoporus, the outer gauge structure of pin (3) slightly, process supporting internal and external threads, the screwed hole at center, pin (3) termination, top is made into the trigonometric curve groove of indent, use specialist tools that pin (3) is rotated down, the circular cone cylinder of its end props up the claw intrados of pawl axle (2) with its outside spreading, claw pawl face blocks the inverted circular cone end of jail at cage (4) fully behind the spreading, because the claw intrados is by locking, claw can not rebound voluntarily, plays the antitheft effect of tearing open.

All the other steps are identical with embodiment 1.

This clip type anti-stealing manhole cover is simple in structure, and appliance is few, and low cost of manufacture, particularly well lid, cage interlocking can not produced Give birth to dislocation, dig and the phenomenon of falling, good anti-theft effect plays a very good protection to the person and property safety, is fit to each Planting the inspection shafts such as pipeline, irrigation canals and ditches, circuit uses.

Claims

1, a kind of clip type anti-stealing manhole cover, this inspection shaft lid comprises well lid (1), pawl axle (2), pin (3) and cage (4), it is characterized in that well lid (1) outer ring and cage (4) inner ring are for circular, well lid (1) bottom is provided with reinforcing rib, the fabrication hole of anti-skidding projection that the quantity that has cap surface does not wait and confession mounting or dismounting carrying usefulness, a left side on well lid (1) central axis, respectively there is a tapped hole at submarginal position, right both sides, pawl axle (2) is housed in the hole, in the inner part with about the corresponding section, position, hole of well lid (1) through hole is arranged respectively also on cage (4) central axis, this hole is not threaded, the lower surface in hole is inverted taper seat.

2, clip type anti-stealing manhole cover according to claim 1, it is characterized in that pawl axle (2) is cylindrical hollow shaft, the external diameter upper end is threaded, the lower end is the claw that has the five equilibrium open slot, claw has elasticity, open slot quantity 3-4, there are two of column ladder holes at pawl axle (2) center, between the big aperture circular cone transition face is arranged.

3, clip type anti-stealing manhole cover according to claim 1, it is characterized in that pin (3) is to be with cone headed pin, there is the screwed hole of mounting or dismounting usefulness at the pin center, and two pawl axles of inspection shaft adapted (2) and two pins (3), pin (3) are used for locking pawl axle (2).

4, clip type anti-stealing manhole cover according to claim 1, it is characterized in that pin (3) in folding process, its circular cone cylinder props up the claw intrados of pawl axle (2) with its outside spreading, claw pawl face blocks the inverted cone end of jail at cage (4) fully behind the spreading, because the claw intrados is by locking, claw can not rebound voluntarily.