CN2178253Y - Theft-proof round cover for manhole shaft - Google Patents

Abstract

The utility model relates to a theft-proof cover of a round inspection well. The theft-proof cover of a round inspection well is principally used on the well mouths of various round inspection wells. The theft-proof cover of a round inspection well is composed of a curb (1) and a well cover (2). The theft-proof cover of a round inspection well is characterized in that a fixing fastening lock (8) is arranged at random point Z on the circumference of the well cover (2); a sawtooth tongue lock (13) is arranged at the other end Y of the same shaft line of the fixing fastening lock (8); a hook (11) on the fixing fastening lock (8) is hooked at an N point at the lower cornice of a supporting platform (10) on the curb (1); the lock tongue (4) of the sawtooth tongue lock is fastened on a G point at the lower cornice of the supporting platform (10) on the curb (1) in oblique. The theft-proof cover of a round inspection well makes use of the dead weight of the wall cover, so the sawtooth tongue lock can lock the wall cover. If someone lifts the wall cover upward or wheels impinge the wall cover, the mutual structure of two locks can lock tightly. Thus, the utility model must use a special key to open the wall cover.

Description

Theft-proof round cover for manhole shaft

The antitheft round manhole cover that the utility model relates to mainly is installed on the well head of manhole of municipal engineering feedwater pipe well, sewage pipe well, rainwater pipe well, heating power pipe well, coal gas pipe well, electric power pipe well, communication pipe well.

Present manhole cover is easily crushed by the vehicle of heavy duty, or is driven fast vehicle and hit from bearing, or is stolen by the people, and the personal injury or the traffic accident that cause therefrom constantly take place, and brings massive losses and harm for national wealth and personal safety.

The purpose of this utility model is to overcome above-mentioned disadvantage, provide a kind of on the basis of existing round manhole cover, increase a fixedly kayser and utilize sawtooth bolt lock cover the sagging power of dead weight and to lock lid, with the antitheft round manhole cover that can open private key.

In order to achieve the above object, the utility model is to realize like this, it is to be made of crib 1, well lid 2, be characterized in being provided with fixedly kayser 8 at any 1 Z place of well lid 2 circumferential edge, be provided with sawtooth bolt lock 13 at the fixing other end Y place of the same axis of kayser 8, fixedly two bolts 6 of kayser 8 usefulness are contained in the Z end below the well lid 2, become integral body with well lid 2, fixedly the grab on the kayser 11 colludes the N of 10 times cornice places of the support platform point (see figure 4) on crib 1, is difficult for proposing unlatching; Sawtooth bolt lock lock 3 also is contained in below the well lid 2 and the fixing other end of kayser 8 same axis (Y end) with two bolts 6, become integral body with well lid 2, sawtooth dead bolt 4 usefulness pins 5 are worn bolt (see figure 3) on sawtooth bolt lock lock 3, the diameter of pin 5 lacks 1～2 millimeter than lock pin hole and dead bolt pin hole, and dead bolt 4 can swing up and down around pin 5.The dead bolt back side (top) gone up pendulum and arrived lock 3 inner tank mouths CD lines to greatest extent like this, and the outside of belly (following) bottom arrives the preceding EF line place of lock 3 notches to greatest extent, makes dead bolt 4 remain heeling condition upward, is unlikely to make dead bolt 4 sagging.Fixedly kayser 8 is in place when the Z end, after grab 11 catches on 10 times cornice N points of crib 1 support platform, put down Y end well lid again, cornice G point must top dead bolt 4 sawtooth 12 under this moment Y end crib support platform, make upwards swing of lock tongue, because putting the distance of dead bolt M, the pin center P is less than the distance (lacking 4mm approximately) that P point G under the support platform is ordered, so sawtooth M point is easily by the G point, again because of the distance of PK distance (big approximately 4mm) greater than PG, so the K point is difficult for falling within the G point, when treating dead bolt 4 back sides also entirely near lock inside groove CD line, well lid is in place to be fallen on the crib support platform, simultaneously dead bolt 4 just by deadweight sagging around pin 5 to the lower swing free-falling, certain of sawtooth 12 a bit just tiltedly is stuck in the G point of 10 times cornice of crib support platform, promptly lock well lid, the big characteristics that this utility model that Here it is locks voluntarily; On will be without foundation, carry or meet express wheel bump, sawtooth dead bolt 4 has withstood the crib support platform, certainly will force well lid to move horizontally to fixing kayser direction, but fixedly kayser and well lid and crib gap seldom (about a 2mm), and grab catches on crib support platform N place, as long as well lid moves 1mm to fixing kayser end, the sawtooth dead bolt is by the sawtooth that just falls of conducting oneself with dignity, sawtooth card, top G point are tight more, and this is second characteristics of this utility model; Starting well lid must be with special-purpose cleek key 9, insert in the keyhole 7 and change 180 °, on carry the sawtooth dead bolt and can start well lid, as long as Y end well lid one leaves crib, the corresponding Z end fixedly grab of kayser also leaves N point under the support platform, whole well lid is all mentioned, and this is the 3rd characteristics of the present utility model.Cleek key and keyhole can set up on their own according to crib and each size of well lid.

The utility model is simple in structure, utilize the deadweight sawtooth bolt lock of well lid just can pin well lid, if any carrying on the people or the wheel bump, utilize fixedly the mutual design feature of kayser and sawtooth bolt lock to lock tighter and tighter, the necessary private key of using could be with the well lid breakdown, and the utility model is a kind of more satisfactory antitheft round manhole cover of using in the present municipal engineering.

Description of drawings:

Fig. 1 is a plane structure schematic diagram of the present utility model;

Fig. 2 is Figure 1A-A sectional view;

Fig. 3 is Fig. 2 Y end enlarged diagram;

Fig. 4 is Fig. 2 Z end enlarged diagram;

Fig. 5 is a cleek key front view.

The explanation of accompanying drawing drawing:

1 crib; 2 well lids; 3 sawtooth bolt lock locks; 4 sawtooth bolt lock dead bolts; 5 pins; 6 set bolts; 7 keyholes; 8 fixing kaysers; 9 cleek keys; 10 support platforms; 11 grabs; 12 sawtooth; 13 sawtooth bolt locks.

In order better to understand and to implement, it is as follows with the accompanying drawing to be that embodiment further specifies below: fixedly kayser 8 can adopt the kayser apart from the shape grab of prior art, the following eaves N place that grab 11 is made with support platform 10 matches, grab just withstands on down eaves N place like this, is fixed on well lid Z place with the set bolt 6 of two M12.Sawtooth bolt lock lock 3 can adopt QT33-15 to make, and bore two holes, sawtooth bolt lock dead bolt 4 can adopt QT33-15 to make, make the long in line 95～100mm in the back side (top), the outside of belly (following) length 65～70mm, end radius is the semicircle of 20mm, tongue lock Center Length average out to 90～95mm, wide 29mm, thick 26～28mm, the facewidth is 7mm, and tooth depth is 3～5mm, and pin 5 can adopt the threadless bolt of M12, on the lock 3 of the end that dead bolt 4 is installed, bore a hole than big 1～2 millimeter of pin with the adenticulate end of dead bolt, set up pin 5, dead bolt 4 can be swung up and down around pin, by two holes of boring on the lock sawtooth bolt lock is fixed on Y place under the well lid with the set bolt 6 of two M12.The utility model can come designs fix kayser and sawtooth bolt lock according to the size of well lid, no matter it is multiple that the weight of well lid has, the capital is sagging and pinning well lid by the weight of well lid itself, all can lock well lid no matter carry well lid or wheel bump on the people by the mutual structure of fixedly kayser and sawtooth bolt lock, have only with private key and well lid could be opened, cleek key 9 can adopt I grade reinforcing steel material, can be stamped to form, and the shape of making as shown in Figure 5 gets final product.

Claims (3)

1, a kind of antitheft round manhole cover is to be made of crib (1), well lid (2), it is characterized in that being provided with fixedly kayser (8) at any 1 Z place of well lid (2) circumferential edge, is provided with sawtooth bolt lock (13) at the fixing other end Y place of the same axis of kayser (8).

2,, it is characterized in that grab (11) on the fixing kayser (8) colludes support platform (10) time N of the cornice place point on crib (1) by the described antitheft round manhole cover of claim 1.

3,, it is characterized in that certain support platform (10) that a bit tiltedly is stuck on the crib (1) of the sawtooth (12) of sawtooth bolt lock dead bolt (4) is descended the G of cornice place point by the described antitheft round manhole cover of claim 1.

Images