CN2481809Y - Antipick built-in lock for cover of manhole - Google Patents

Abstract

The utility model relates to an anti-pick built-in lock with safety for manhole covers. A safety pin channel is additionally arranged on a lock pin, a safety deflector rod provided with an arch slippery fellow and a safety pin is additionally arranged on the clock closure, the safety deflector rod is hidden in the clock closure by a restoring spring, the arch slippery fellow and the safety pin, and a lock pin positioning nylon sliding bush is additionally arranged. When a key is rotated in anticlockwise direction, an L-shaped push rod on the key rod motivates the arch slippery fellow to move and drives the safety pin to be pulled out from the lock pin channel, then the deflector rod of the lock pin toggles an eave tile, the lock pin returns to the clock closure, and the built-in lock is opened. When the key is rotated in clockwise direction, the deflector rod of the lock pin toggles the eave tile and makes the lock pin extend, the built-in lock is locked, and the safety pin all automatically resets under the action of the spring for taking the effect of safety and anti-pick.

Description

Manhole cover is with preventing dialling built-in lock

The utility model relates to underground installations such as a kind of municipal engineering, and maintenance test is with the built-in lock on the well lid, and the feature that it is different from other well lid built-in lock is to be provided with the anti-safeties of dialling, and can prevent that built-in lock from illegally being pushed aside and facility in the protection check well arranged effectively.

At present, manhole cover has all designed simple different structure form lock pin with built-in lock, from built-in lock structure and principle analysis, very easily pushes aside with the iron rod of band elbow, loses the built-in lock lock function, thereby can not effectively protect facility in the well.

The purpose of this utility model: a kind of manhole cover built-in lock is provided, and built-in lock is provided with the anti-safeties of dialling, and can prevent effectively that built-in lock from illegally being pushed aside, opens well lid, damages facility in the well.

The purpose of this utility model is achieved in that in the sliding sleeve in sealed, the lock pin of band insurance cotter way and eave tile is housed, sealed outer left side is provided with the boss with holes of installation insurance dead man, insurance driving lever one end is connected on the boss with pin bolt, the insurance driving lever other end hangs with the safety plug back-moving spring, the insurance dead man is provided with safety plug and passive arc slippery fellow, sealed external right side is provided with the ears or side handles of a utensil that the band key is lived the hole surely, the top of key bar is provided with alignment pin, makes progress again, and bar is provided with the lock pin poke rod, with " L " shape push rod that promotes arc slippery fellow, lock pin poke rod and " L " push rod, clear spacing is 1.5 times of well lid wall thickness, and becomes 25 ° of angles.When key is inserted in the key positioner hole from the well lid keyhole, when being rotated counterclockwise key, " L " shape push rod from sealed go up " L " shape notch change over to sealed in, the arc slippery fellow who promotes on the insurance driving lever moves, and after driving safety plug on the insurance driving lever and withdrawing from cotter way, lock pin poke rod on the key bar begins to stir the eave tile on the lock pin, is rotated further key, lock pin is return opened built-in lock in sealed; When clockwise rotating key bar, the lock pin poke rod is stirred the lock pin eave tile, and lock pin is stretched out in the sealed following seam of bearing surface that enters on the bearing.Safety plug automatically resets under action of reset spring, and promptly safety plug enters cotter way, built-in lock locking, the arc slippery fellow on the insurance driving lever be hidden in sealed in, have only private key screw in sealed in, open insurance after, just can open built-in lock, built-in lock is realized the anti-function of dialling thus.Sealed, lock pin and insurance driving lever all adopt the direct Foundry Production of QT450-10 material, minimum wall thickness (MINI W.) 5mm; adopt 2 M8 bolts built-in lock to be fixed on the linkage frame at the well lid back side; have enough bonding strengths, can protect built-in lock not pushed aside by force and damage, to reach the anti-function of dialling of built-in lock.

Owing to adopt such scheme, after the built-in lock locking, lock pin by anti-group of safety plug locking, therefore, has the double locking effect again.Have only the private key of use to open anti-dialling after the safety plug, just can open built-in lock, compare, can prevent effectively that built-in lock from illegally being pushed aside, effectively protect facility in the well with other built-in lock.

Below in conjunction with description of drawings structure of the present utility model and effect

Fig. 1 is a built-in lock structure sectional view

Fig. 2 is that the A of Fig. 1 is to view

Fig. 3 is that the B of Fig. 1 is to view

Fig. 4 is the schematic diagram of private key

Among the figure: 1, back-moving spring 2, insurance dead man 3, key 4, sealed 5, positioning sleeve 6, lock pin 7, pin bolt 8, packing ring 9, nut 10, foxy band bar bolt 11, nut 12, packing ring

As can be seen from Figure 1: sealed (4) upper left side is provided with the boss with holes of installation insurance dead man (2), installation insurance driving lever on the boss, insurance driving lever middle part is provided with safety plug and arc slippery fellow, one end is provided with installation axle hole, the other end is provided with back-moving spring (1) hanging hole, sealed rear end is provided with the ears or side handles of a utensil with holes that back-moving spring is installed, sealed (4) right side is provided with the ears or side handles of a utensil in band key positioner hole, the lock pin (6) of location nylon sliding sleeve (5) and band location cotter way and eave tile is housed in sealed (4), nylon sliding sleeve (5) is positioned on the well lid built-in lock fastening frame, establish the built-in lock fastening frame on the well lid, fastening frame is provided with two fastening bolt via holes of using, available screw (10) and nut (11) tighten together well lid (3) and built-in lock sealed (4).

Claims (1)

1. A kind of manhole cover built-in lock, lock body is fixed by bolts to the manhole cover back side, is provided with nylon sliding sleeve and slidingtype lock pin in sealed, it is characterized in that: lock pin is provided with insurance cotter way and eave tile; Sealed outer boss with holes and the insurance driving lever that is installed on the boss of being provided with, insurance driving lever middle part is provided with safety plug and passive arc slippery fellow, and driving lever one end tape spool hole is connected with boss; The insurance driving lever other end is with holes, and hanging with automatically resets uses back-moving spring; Be provided with the key of " L " shape push rod and lock pin poke rod.

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