CN201078134Y

CN201078134Y - Anti-theft device for manhole cover

Info

Publication number: CN201078134Y
Application number: CNU2007201250279U
Authority: CN
Inventors: 聂勋文
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-23
Filing date: 2007-08-23
Publication date: 2008-06-25
Anticipated expiration: 2017-08-23

Abstract

The utility model discloses an anti-theft device for catch pit cover, which comprises a catch pit catch pit cover (1), and is characterized in: a key insertion hole (1a) is arranged on the catch pit cover (1), an anti-theft lock (2) is mounted on the bottom of the catch pit cover (1) near the key insertion hole (1a), a key hole (2c) is arranged on the anti-theft lock (2), a journal stirrup (ad) extends upwards from the anti-theft lock (2), and the anti-theft lock (2) is fixed with bolts to the bottom center of the catch pit cover (1); an U-shaped brackets (3) is arranged in symmetry near the bottom edges of the catch pit cover (1), and the two legs of the U-shaped bracket (3) are connected to the bottom of the catch pit cover (1) with bolts; a lock pin (2a) extends from each end of the anti-theft lock (2), and the lock pin (2a) passes through the cavity of the U-shaped bracket (3).. The utility model has advantages such as simple structure, good anti-theft effect, easy operation, lower cost, and easier machining, etc.; in addition, the utility model has good waterproof and corrosion-resistant performance and is more durable in outdoor environments..

Description

The manhole cover anti-theft device

Technical field

The utility model belongs to anti-theft device, specifically, is a kind of manhole cover anti-theft device.

Background technology

Inspection shaft covers the inspection shaft mouth that is widely used in network of underground in urban construction, be the facility of convenient relevant industry to the essential indwelling of maintenance management institute of its pipe network, unlatching when the inspection shaft lid should conveniently need, prevent from again to damage and theft, to become the trap on the road after the inspection shaft lid is stolen, and bring danger for pedestrian and vehicle pass-through.Now domestic widely-used iron and steel class inspection shaft lid, various places cause the people to fall after often all having the inspection shaft lid stolen, and wheel is absorbed in waiting and causes the car incident of hindering of speaking sarcastically to report on newspaper, TV, causes heavy losses and injury to the country and people's lives and properties.Domesticly in recent years also occurred some manhole cover anti-theft devices in succession, but structure is too simple, can both open with hook-shaped little iron wire, anti-theft effect is very poor, and the stolen phenomenon of well lid is not solved at all.Some manhole cover anti-theft devices have also appearred in developed country in succession, and are high in technological content, exist cost too high, the domestic problem that can't promote.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of manhole cover anti-theft device of with low cost, good anti-theft effect.

The technical solution of the utility model is as follows: a kind of manhole cover anti-theft device, comprise the inspection shaft lid, its key is: described inspection shaft covers and is provided with key and stretches into the hole, the inspection shaft lid bottom surface of stretching into the hole by this key is provided with theftproof lock, described theftproof lock is provided with keyhole, this theftproof lock has extended upward journal stirrup, by bolt theftproof lock is fixed on inspection shaft lid bottom surface central authorities, be arranged with " U " type support near described inspection shaft lid bottom edge, should be connected with inspection shaft lid bottom surface bolt by " U " type support two legs, described theftproof lock two ends are extended with lock pin, and this lock pin passes the cavity of described " U " type support.Described lock pin extend into the below of inspection shaft inner chamber boss circle, with inspection shaft and the fixing pinning of inspection shaft lid, adopt the principle of rolling screen door lock in the usually said cylinder lock of people, open as rolling door, key rotates from interstitial hole, and two is flexible and open the inspection shaft lid, because the relevant industry in city is used inspection shaft lid quantity to have to have more and lacked, same key can be opened one group of lock when many production taked was locked, and avoided the too many inconvenience management of key to use.This device on original inspection shaft lid basis the cost increase seldom, relative cost is cheap, it is also convenient to open, lockset is that the key that cylinder lock is opened must be the key of coupling, or joins and get the higher key good anti-theft effect of ratio of precision, very practicality is beneficial to popularization.

In order to prevent to get rusty, lock pin makes with stainless steel material, and the cross section is circular, even " U " type support is not a stainless steel, the time has been grown corrosion, because of lock pin and " U " type support contact point are little, can easily open in the same old way.

The middle part of described theftproof lock upper surface is provided with the isosceles trapezoid boss, the side all is that the inclined-plane has dwindled to have and leaks or steam forms the contact surface of water droplet, make it the substantially anhydrous lock core that enters, keyhole is positioned at this boss center, and this keyhole stretches into centerline hole with described key and overlaps.It is the circular port of first half radius greater than the Lower Half radius that described key stretches into the hole, be milled with screw thread in its Lower Half, have and bolt that described key stretches into hole coupling screws in to clog and also is provided with the water-tight packing ring between the aperture, anti-sealing stretches into the hole by key and enters the corrosion lockset, and this bolt top has back-out and the screw-in that foursquare groove makes things convenient for bolt.

Other has the side horizontal direction of the described theftproof lock of a kind of scheme that keyhole is set, and the inspection shaft lid bottom surface that key stretches between hole and the theftproof lock is provided with the baffle plate that stretches into the hole inclination to key.Need the corner key handle when opening the inspection shaft lid, key is installed on the corner key handle, stretch into the hole from key and enter and unblank, the baffle plate of inclination also has well and keeps off the rain, and prevents the lock core corrosion.

The laterally inclined keyhole that is provided with downwards that also has the described theftproof lock of a kind of scheme, can ponding even be tilted to down lock core water inlet yet, this keyhole next door is positioned at and has key on the described inspection shaft lid bottom surface and stretch into the hole, and key stretches into inspection shaft lid bottom surface between hole and the theftproof lock and is provided with to key and stretches into the baffle plate that the hole tilts.It is key operated that this scheme inspection shaft lid needs the corner key handle to load onto equally, and the baffle plate of inclination rises and keeps off the rain, and prevents the lock core corrosion.

Simultaneously in order to reach the antirust effect of better waterproof, being locked in when producing with the stainless steel is shell, lock core must be made with rush-resisting materials such as stainless steels entirely, inject with senior lubricant in the lock core, can corrosion even have water or aqueous vapor to enter lock core at ordinary times yet, the lock pin that stretch out at relatively large well lid two ends can be made as two.

Beneficial effect: the utlity model has simple in structure, good anti-theft effect, unlatching convenient, implement easily, characteristics such as cost is lower, processing is more prone to, the good corrosion resistant effect of waterproof again is more durable in use under the environment out of doors simultaneously.

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 B-B sectional view of Fig. 1;

Fig. 4 is the structural representation of embodiment 2;

Fig. 5 is the structural representation of embodiment 3.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

Embodiment 1

As Fig. 1, Fig. 2, shown in Figure 3, the utility model manhole cover anti-theft device, inspection shaft lid 1 is provided with key and stretches into hole 1a, the inspection shaft that leans on this key to stretch into hole 1a covers 1 bottom surface theftproof lock 2 is housed, described theftproof lock 2 is provided with keyhole 2c, this theftproof lock 2 has extended upward journal stirrup 2d, by bolt theftproof lock 2 is fixed on inspection shaft and covers 1 bottom surface central authorities, described inspection shaft covers 1 bottom edge and is arranged with " U " type support 3, these 3 liang of legs of " U " type support cover 1 bottom surface bolt with inspection shaft and are connected, described theftproof lock 2 two ends are extended with lock pin 2a, and this lock pin 2a passes the cavity that described " U " type support 3 forms.Described lock pin 2a cross section is circular, and the middle part of described theftproof lock 2 upper surfaces in the middle part of described theftproof lock 2 upper surfaces is provided with isosceles trapezoid boss 2b, and keyhole 2c is positioned at this boss 2b center, and this keyhole 2c and described key stretch into hole 1a central lines.It is the circular port of first half radius greater than the Lower Half radius that described key stretches into hole 1a, be milled with screw thread in its Lower Half, there is the bolt 4 that stretches into hole 1a coupling with described key to screw in and clogs the aperture, these bolt 4 tops have foursquare groove, the lock pin that stretches out to two ends in the lock can be single, also can be two.

Inspection shaft lid 1 is placed on the inspection shaft inner convex platform circle, inspection shaft covers the lock pin 2a that theftproof lock 2 two ends that 1 bottom surface is provided with stretches out and passes the cavity that described " U " type support 3 and inspection shaft lid 1 form, its termination extend into inspection shaft inner convex platform circle below, whole inspection shaft lid 1 is fixed and is locked in the well, needing to open inspection shaft covered 1 o'clock, by key operated lock, the lock pin 2a at theftproof lock 2 two ends is to the withdrawal of lock core direction, and lock pin 2a no longer is positioned at boss circle below.

Embodiment 2

As shown in Figure 4, present embodiment is all identical with embodiment 1, the side horizontal direction of different is described theftproof lock 2 is provided with keyhole 2c, key stretches into inspection shaft between hole 1a and the theftproof lock 2 and covers 1 bottom surface and be provided with to key and stretch into the baffle plate 5 that hole 1a tilts, open and need corner key handle 6 when inspection shaft covers 1, key is installed on the corner key handle 6, stretches into hole 1a from key and enter and unblank.

Embodiment 3

As shown in Figure 5, present embodiment is all identical with embodiment 1, that different is the laterally inclined keyhole 2c that is provided with downwards of described theftproof lock 2, key stretches into inspection shaft between hole 1a and the theftproof lock 2 and covers 1 bottom surface and be provided with to key and stretch into the baffle plate 5 that hole 1a tilts, open and need corner key handle 6 when inspection shaft covers 1, key is installed on the corner key handle 6, stretches into hole 1a from key and enter and unblank.

Claims

1. manhole cover anti-theft device, comprise inspection shaft lid (1), it is characterized in that: described inspection shaft lid (1) is provided with key and stretches into hole (1a), theftproof lock (2) is equipped with in inspection shaft lid (1) bottom surface of stretching into hole (1a) by this key, described theftproof lock (2) is provided with keyhole (2c), this theftproof lock (2) has extended upward journal stirrup (2d), by bolt theftproof lock (2) is fixed on inspection shaft lid (1) bottom surface central authorities, be arranged with " U " type support (3) near described inspection shaft lid (1) bottom edge, should be connected with inspection shaft lid (1) bottom surface bolt by " U " type support (3) two legs, described theftproof lock (2) two ends are extended with lock pin (2a), and this lock pin (2a) passes the cavity of described " U " type support (3).

2. according to the described manhole cover anti-theft device of claim 1, it is characterized in that: described lock pin (2a) cross section is for circular.

3. according to the described manhole cover anti-theft device of claim 1, it is characterized in that: the middle part of described theftproof lock (2) upper surface is provided with isosceles trapezoid boss (2b), and described keyhole (2c) is positioned at this boss (2b) center and described key stretches into hole (1a) central lines.

4. according to claim 1 or 3 described manhole cover anti-theft devices, it is characterized in that: described key stretches into hole (1a) and is the circular port of first half radius greater than the Lower Half radius, be milled with screw thread in its Lower Half, have the bolt (4) that stretches into hole (1a) coupling with described key to screw in and clog the aperture, this bolt (4) top has foursquare groove.

5. according to the described manhole cover anti-theft device of claim 1, it is characterized in that: the side horizontal direction of described theftproof lock (2) is provided with keyhole (2c), and inspection shaft lid (1) bottom surface that key stretches between hole (1a) and the theftproof lock (2) is provided with the baffle plate (5) that stretches into hole (1a) inclination to key.

6. according to the described manhole cover anti-theft device of claim 1, it is characterized in that: inspection shaft lid (1) bottom surface that the laterally inclined keyhole (2c) that is provided with downwards of described theftproof lock (2), key stretch between hole (1a) and the theftproof lock (2) is provided with the baffle plate (5) that stretches into hole (1a) inclination to key.