CN2399491Y

CN2399491Y - Manhole cover locking mechanism and key thereof

Info

Publication number: CN2399491Y
Application number: CN 99250578
Authority: CN
Inventors: 曲兆升; 刘国岩
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-09
Filing date: 1999-12-09
Publication date: 2000-10-04
Anticipated expiration: 2009-12-09

Abstract

The utility model relates to a manhole cover locking mechanism and key thereof, wherein, the locking mechanism comprises a manhole with a via hole axially. A tumbler is equipped on the undersurface of the manhole and also the position of the via hole. An axial hole is arranged in the middle of the tumbler whose edge area is movably installed to a bolt which is composed of an elongated rod. The key comprises an elongated rod, one end of which is provided with a projection that can stretch radially along the rod. The manhole can be closed or opened when the key inserts into the appropriate position of the tumbler and rotates; thus, its structure is especially simple with very convenient operation.

Description

Well lid blocking device and key thereof

The utility model relates to a kind of key that is used for the blocking device on the well lid and opens this blocking device.

Usually for the body delivery pipeline of heating, air feed, water system in the section of being laid, all be provided with manhole shaft to a spacing at interval, and the necessaries that keeps this system normally to move be installed in well.Yet in the prior art, the well lid of this kind well just is placed in the top of well head, anyone can move it easily, so, often take place that well lid is lost or well in facility arbitrarily by the phenomenon of irrational transfer or destruction, cause countless artificial serious accidents.

For addressing the above problem, the general measure of being adopted is that a connecting ring is set in the bottom of well lid, with chain or rope pass this connecting ring and with well in affixed thing bolt is together by force, screw with key lock or with toggle then, with this well lid is fixed on the well head position, loses or arbitrarily moved by the people in order to prevent well lid.But at chain or with toggle in the fastening rope process, operating personnel must could finish it by the axially extending bore that well lid has, after operating process is finished, above-mentioned through hole can not be sealed, and lock and toggle are easily opened the veteran, and they can finish multi-pass operation by this method, so, this kind device except that operating process than the complexity, go back non insurance, be not suitable for large tracts of land and promote the use of.

Task of the present utility model provides a kind of blocking device that is used on the well lid, and it can lock and open well lid easily with specific mechanical device, in order to overcome above-mentioned weak point.

For finishing above-mentioned task, the utility model comprises a well lid that axially has through hole, a tumbler is installed at this well lid soffit and at the through hole position, this tumbler middle part is provided with the axial hole of aperture greater than above-mentioned through hole, and its limit portion regional activity the latch that is made of microscler rod member is installed.

Axial aperture on the described tumbler is to being outward extended with at least two grooves.

Latch on the described tumbler can be provided with two at least, and passes through pivotally connected between latch and the tumbler.

Described tumbler soffit or be provided with one with soffit with keeping at a certain distance away and be used to hinder the plate washer that key passes through.

A kind of key of opening described blocking device that is specifically designed to, this key comprises an elongated rod member, being equipped with in an end of rod member can be along the projection of the radial expansion of this rod member.

Described projection can be provided with two, and is provided with an elastomeric element between two projections.

Because the utility model adopts a tumbler that has axial hole, and this axial hole will never make tumbler rotate greater than the through hole on the well lid with conventional rod member or other parts, has only with specific key just can open it, so this blocking device quite insures; In addition, this blocking device only adopts a tumbler that has latch, so its structure is simple especially, and operation is also convenient especially.

Below in conjunction with drawings and Examples the utility model is elaborated.

Accompanying drawing 1 is the surface structure schematic diagram that has the well lid of blocking device;

Accompanying drawing 2 is surface structure schematic diagrames of opening the key of blocking device among Fig. 1.

Referring to Fig. 1, the middle part of well lid 1 is provided with a through hole 11, at the soffit 12 of well lid 1 and at through hole 11 positions a blocking device is installed, and this blocking device is made of tumbler 2 and the mortise lock 3 that is installed in versatilely on the tumbler 2.Tumbler 2 middle parts are provided with the axial hole 21 of an aperture greater than above-mentioned through hole 11, and this axial hole radially outward have two grooves 22, tumbler 2 can come back rotation along the plane at well lid 1 place; Latch 3 is made of elongated rod member, and its end is installed in the limit portion zone of tumbler 2 by the frame axle, and rotating diverting member 2 can make latch 3 extend radially outwardly or shrink.Axial hole 21 on the described tumbler and latch 3 can be provided with a plurality of, and are not limited only to this given a kind of structure of present embodiment.

Accompanying drawing 2 provides and is specifically designed to the key 4 of opening the described blocking device of Fig. 1, this key comprises an elongated rod member 41, being provided with at an end of rod member can be along the projection 42 of its radial expansion, this projection can be provided with two at least, they are made of leg-of-mutton plate, its leg-of-mutton limit extend in the groove of rod member 41, and between these two limits an elastomeric element 43 is installed, and makes two projections 42 remain the trend that rises to overhanging.

During use, key 4 is inserted by force from through hole 11, the effect that is subjected to the hole wall resistance because of projection 42 is inwardly shunk, till making it fall in the groove 22 on the above-mentioned tumbler 2, rotating rod member 41 then can make tumbler 2 rotate, thereby latch 3 extends radially outwardly or inwardly contraction, makes well lid 1 locking or unlatching.

Claims

1. well lid blocking device, comprise a well lid that axially has through hole, it is characterized in that: a described well lid soffit and tumbler is installed at the through hole position, this tumbler middle part is provided with the axial hole of aperture greater than above-mentioned through hole, and its limit portion regional activity the latch that is made of microscler rod member is installed.

2. device according to claim 1 is characterized in that: the axial aperture on the described tumbler is to being outward extended with at least two grooves.

3. device according to claim 1 is characterized in that: the latch on the described tumbler can be provided with two at least, and passes through pivotally connected between latch and the tumbler.

4. device according to claim 1 is characterized in that: described tumbler soffit or be provided with soffit with keeping at a certain distance away and be used to hinder the plate washer that key passes through.

5. one kind is specifically designed to the key of opening the described blocking device of claim 1, and it is characterized in that: this key comprises an elongated rod member, and being equipped with in an end of rod member can be along the projection of the radial expansion of this rod member.

6, key according to claim 5 is characterized in that: described projection can be provided with two, and is provided with an elastomeric element between two projections.