CN2227691Y

CN2227691Y - Theft sewage manhole cover

Info

Publication number: CN2227691Y
Application number: CN 95206351
Authority: CN
Inventors: 朱海泉; 时建平
Original assignee: MACHINERY PLANT ZHUMADICN CITY HENAN PROV
Current assignee: MACHINERY PLANT ZHUMADICN CITY HENAN PROV
Priority date: 1995-03-16
Filing date: 1995-03-16
Publication date: 1996-05-22
Anticipated expiration: 2005-03-16

Abstract

The utility model relates to a manhole cover systematic facility which is used in city water feeding and draining channels or other underground pipeline engineering for checking or dredging. As convex helical slots which are mutually buckled by rotational energy, one or more triangular locking screws, and a special triangular spanner which is matched with one triangular locking screw are arranged at the connection of manhole covers, the manhole covers can not be levered after the manhole cover systematic facility is installed, and a general tool for criminal purposes can not disassemble the manhole covers; even if the locking screws are disassembled, the manhole covers are difficult to open if the method is impolitic. Thus, the utility model has a better theft protection function.

Description

A kind of antitheft cesspool cover

The utility model relates in city upper and lower water course or other underground pipeline, the official lineman's journey, for ease of checking or mediation and the well lid system facility of building.

The present open well convering system facility used of city, by manhole cover base, well lid and hinge-coupled combination, it is easy to be pried open, lay down, steal, and makes some well heads open, causes some pedestrians or cyclist to fall into accidentally in the well, causes casualty accident.

The purpose of this utility model provides and a kind ofly prevents to pry open well lid, is difficult for laying down the well lid system and device of stealing.

For reaching this purpose, the utility model is by at manhole cover base and well lid joint, and design has the protruding spiral groove detained mutually by energy of rotation and at least one triangle lock-screw and special-purpose triangle spanner that matches with the triangle lock-screw to realize.

The advantage of the utility model and existing open well convering system is to have anti-theft feature.And manhole cover base and well lid and the protruding spiral groove of wearing on it all form by casting, do not need machine tooling, so cost price is suitable with the open well convering system.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is the utility model combination schematic diagram.

Fig. 2 is the well lid schematic side view.

Fig. 3 is the well lid schematic side view.

Fig. 4 is the special-purpose triangle spanner schematic diagram that matches with the triangle lock-screw.

By shown in Figure 1, this utility model comprises well lid 2 and cage 3 and one or more triangle lock-screws, illustrate by Fig. 2, Fig. 3, on well lid 2, the manhole cover base 3 respectively design have the protruding spiral groove of detaining mutually by energy of rotation 4,5, the utility model also to comprise a special-purpose triangle spanner 6 that matches with triangle lock-screw 1 as shown in Figure 4.When closing well lid 2, well lid 2 epirelief spirals 4 are faced toward two protruding spirals 5 middle screw-ins on the manhole cover base 3, when being screwed into the end, return rotation again, make the crotch of well lid 2 epirelief spirals 4 buckle the protruding line 5 that revolves on the manhole cover base 3, utilize special-purpose triangle spanner 6 that triangle lock-screw 1 is tightened again, with well lid 2 lockings; When opening well lid 2, turn on triangle lock-screw 1 with special-purpose triangle spanner 6, rotary well cover 2 also opens it.

This anti-stealing manhole cover system, general stealer can't be pried open with crowbar, uses common tool as slow-witted spanner, adjustable spanner or screwdriver etc. also can't be laid down the triangle lock-screw, even lock-screw is laid down, be alone that crime also is difficult to the well lid of outwarding winding, so it have anti-theft feature preferably.

Claims

A kind of antitheft cesspool cover, it is the well lid system facility that the city sewage effluent is built with the maintenance underground pipeline, by well lid, manhole cover base combination, its technical characterictic is: design protruding spiral groove (4,5) and at least 1 the triangle lock-screw of detaining mutually by energy of rotation (1) respectively at well lid (2) and manhole cover base (3) joint, well lid (2) can be locked on the manhole cover base (3) by triangle lock-screw (1).