CN2177750Y

CN2177750Y - Anti-theft well cover

Info

Publication number: CN2177750Y
Application number: CN 93246530
Authority: CN
Inventors: 武建波; 钱永录
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-27
Filing date: 1993-12-27
Publication date: 1994-09-21
Anticipated expiration: 2003-12-27

Abstract

The utility model discloses an anti-theft well cover composed of a well cover, a base, an anti-theft chain, etc. The anti-theft chain, the well cover, and the base are connected together by a disposable connection snap ring, which has an anti-theft function. The utility model adopts the disposable connection snap ring, which has the advantages of simple and practical connection, firm connection, and uneasy damage.

Description

Anti-theft well cover

The utility model relates to a kind of well lid, especially a kind of anti-stealing manhole cover.

In urban water supply and sewerage facility and various network of underground, often various manholes need be set, the manhole well lid is because of there being the value of recycling often stolen, bring inconvenience to Pedestrians and vehicles, people have designed various anti-stealing manhole covers for this reason, as with Chinese patent 91217256.8 disclosed " lock control anti-stealing manhole cover ", disclosed 91207810.3 " anti-theft security well lid " for representative with the antitheft well lid of lock control devices with Chinese patent 91214185.9 disclosed " anti-theft and turnover preventing formula well lid ", disclosed 90209856.X " can heighten antitheft manhole cover " for representative with chain constant connection well lid, the well lid that base is antitheft.

The well lid complex structure that lock control devices is antitheft, manufacturing cost height, and easily corrosion, obstruction etc. fail to promote the use of; With chain constant connection well lid, the antitheft well lid of base, the employing welding manner that has is fixed on chain on well lid or the base, needs to be unfavorable for site operation with special welding equipment, and what have utilizes the bolt arrangement constant connection, destroyed easily.

The purpose of this utility model is to provide a kind of and adopts disposable connection snap ring with chain constant connection well lid, the antitheft well lid of base mode, and door chain and well lid, base are linked together, and need not use Special Equipment, and be difficult for destroyed.

The purpose of this utility model can realize in the following manner:

A kind of anti-stealing manhole cover of forming by well lid, base, door chain etc., well lid and base link together by door chain and disposable connection snap ring, disposable connection snap ring is bent by round steel and forms, two ends are processed with dop and deck respectively, dop is made of head and neck, head outer diameter forms the shaft shoulder greater than neck, and is become four block tongues by symmetry division, and the dop head center is processed with circular hole; Hole shape is corresponding with dop in the deck, the shaft shoulder in forming; Steel ball is arranged in the deck, and its external diameter is greater than dop head center circular hole endoporus; When dop was squeezed in the deck, steel ball made dop stuck in deck the block tongue spreading, and door chain and well lid or base are bound up.

The utlity model has following advantage:

1, the utility model adopts disposable connection snap ring, and door chain and well lid, base are bound up, and connects firmly, safe and reliable, is difficult for destroyed.

2, the utility model connection operation is simple, need not use special equipment, only needs dop to be squeezed into deck get final product with disposable connection snap ring with door chain and well lid, base sheath together.

3, the utility model is simple in structure, easily manufactured.

The utility model accompanying drawing drawing is described as follows:

Fig. 1 is the utility model structural representation

The disposable connection snap ring of 1-well lid 2-base 3-door chain 4-

Fig. 2 is a disposable connection snap ring structural representation in the utility model

5-dop 6-deck 7-steel ball

Fig. 3 is a disposable connection snap ring dop structure chart in the utility model

Fig. 4 is that the A of Fig. 3 is to view

Fig. 5 is a disposable connection snap ring deck structure chart in the utility model

Below in conjunction with accompanying drawing the utility model embodiment is further described:

As shown in Figure 1, a kind of anti-stealing manhole cover of forming by well lid (1), base (2), door chain (3) etc., on the reinforcing rib of the well lid back side, offer the mooring hole, base (2) bottom also offers the mooring hole, by the disposable connection snap ring in mooring hole (4) well lid (1), base (2) is linked together with door chain (3); As shown in Figure 2, disposable connection snap ring (4) is bent by the 45# round steel and forms, two ends are processed with dop (5) and deck (6) respectively, in dop shown in Fig. 3,4 (5) structural representation, dop (5) is made of head and neck, head outer diameter forms the shaft shoulder that external diameter differs 3 millimeters greater than neck, and is become four block tongues by symmetry division, and dop (5) head center is processed with the circular hole of 3 millimeters of φ; The head end inside and outside circle is processed with chamfering, and in deck shown in Figure 5 (6) structural representation, the interior hole shape of deck (6) is corresponding with dop (5), forms the interior shaft shoulder of relevant 3 millimeters of internal diameter; The end inside and outside circle is processed with chamfering, deck (6) bottom centre is processed with the taper shrinkage pool, be convenient to steel ball (7) location, 6 millimeters of diameter of the steel ball, when dop (5) was driven into deck (6), steel ball (7) made dop (5) stuck in deck (6) the tongue spreading, door chain (3) and well lid (1) or base (2) are bound up, play antitheft effect.

Claims

1, a kind of anti-stealing manhole cover, form by well lid (1), base (2), door chain (3) etc., well lid (1) links together by door chain (3) and disposable connection snap ring (4) with base (2), it is characterized in that: described connection snap ring (4) is bent by round steel and forms, two ends are processed with dop (5) and deck (6) respectively, and dop (5) is made of head and neck, and head outer diameter forms the shaft shoulder greater than neck, and being become four block tongues by symmetry division, dop (5) head center is processed with circular hole; The interior hole shape of deck (6) is corresponding with dop (5), the shaft shoulder in forming; Steel ball (7) is arranged in the deck (6), and its external diameter is greater than dop (5) head center circular hole endoporus; Dop is squeezed into deck (6) when interior, and steel ball (7) makes dop (5) stuck in deck (6) the block tongue spreading, and door chain (3) and well lid (1) or base (2) are bound up.