CN201007006Y

CN201007006Y - Anti-stealing manhole cover with pneumatic power lock

Info

Publication number: CN201007006Y
Application number: CNU2007201402854U
Authority: CN
Inventors: 张华�
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-16
Filing date: 2007-03-16
Publication date: 2008-01-16
Anticipated expiration: 2017-03-16

Abstract

Disclosed is an anti-theft manhole cover with a pneumatically operated lock, the manhole cover is connected fixedly with a barrel-shaped cylinder of equivalent radius, a plunger set is arranged in the cylinder, the plunger rod crosses left and right side wall of the cylinder and is hinge connected with a dagger-shaped deflector rod and a bolt respectively, the middle part of the deflector rod is connected fixedly with the manhole cover via a central shaft, the other end of the deflector rod is hinge connected with one end of the bolt. The manhole cover must be opened within pressure, ordinary non-professional personnel is hard to open thereby the manhole cover has the advantages of excellent anti-theft performance, anti-loss, ensuring safety of pedestrian and vehicle and wide spreading value.

Description

The anti-stealing manhole cover of band gas-operated lock

Technical field

The utility model relates to the inspection shaft lid on a kind of road, especially a kind of anti-stealing manhole cover with gas-operated lock.

Background technology

At present, the inspection shaft lid that uses on the road, all belong to metal inspection shaft lid, it is abundant firmly, and they cover on inspection shaft, can guarantee the safety of pedestrians and vehicles, but, because these inspection shaft lids are made by metal, they all have the economic worth of recycling, and mostly are being placed on the inspection shaft seat of being slidingly matched also, be easy to lay, also be easy to take out, therefore very easily lose, and hard to guard against, in a single day this lose just can bring very big insecurity to pedestrian and vehicle, even can cause very big injury accident, to this, also there is not good solution at present.

Summary of the invention

In order to overcome the shortcoming that present inspection shaft lid is easily lost, the utility model provides a kind of anti-stealing manhole cover with gas-operated lock, this inspection shaft lid must can be opened with the air pressure gas transmission, general layman is difficult to open again, therefore, it has good theftproof performance, is difficult for losing, can guarantee the safety of pedestrians and vehicles, have application value widely.

The technical scheme that its technical problem that solves the utility model adopts is: this anti-stealing manhole cover comprises latch (1), (4), (14), (17), piston group (6), (12), driving lever (2), (5), (13), (16), cylinder body (8) and obstruction (9) five parts; The isometrical cylinder body (8) of this anti-stealing manhole cover (18), (21) and round barrel shape is fixedlyed connected; In cylinder body (8), right each smart cooperation of one the first from left is installed a piston group (6), (12), its piston rod respectively passes the left and right sides sidewall of cylinder body (8), end with the driving lever (2) of rod-short, (5), (13), (16) is hinged respectively, the middle part of its driving lever, fixedly be hinged by jointed shaft (3), (15) and inspection shaft lid (18) respectively, the other end of its driving lever is hinged with an end of latch (1), (4), (14), (17) respectively; By piston group (6), (12) stretching motion to both sides, can drive the motion of driving lever (2), (5), (13), (16) and latch (1), (4), (14), (17) in proper order, thereby latch is stretched into or withdraw from the fixed frame (20) of inspection shaft lid (18), thereby finish the locked of this inspection shaft lid and open.

Its beneficial effect is: this inspection shaft lid must can be opened with air pressure, and general layman is difficult to open again, and therefore, it has good theftproof performance, is difficult for losing, and can guarantee the safety of pedestrians and vehicles, has application value widely.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and the embodiments;

Accompanying drawing is a structural principle schematic diagram of the present utility model;

Among the figure, 1 latch, 2 driving levers, 3 jointed shafts, 4 latches, 5 driving levers, 6 piston groups, 7 tension springs, 8 cylinder bodies, 9 stop up 10 transfer ports, 11 tension springs, 12 piston groups, 13 driving levers, 14 latches, 15 jointed shafts, 16 driving levers, 17 latches, 18 inspection shafts lid, 19 inspection shafts lid fixed frame, 20 inspection shafts lid fixed frame, 21 inspection shafts lid.

The specific embodiment

In the drawings, on the periphery of cylinder body (8), one side has a transfer port (10), the opposite side of this hole correspondence has the perforate of a band silking, one of the installation that this perforate cooperates has the obstruction (9) of silking structure, this obstruction (9) upper end has the groove that cooperates with screwdriver, by rotating this obstruction in the screwdriver insertion groove, this obstruction is rotated, stop up the purpose that reaches gas leakage and gas shutoff thereby reach, when when squeezing into gas, if obstruction (9) is unclamped having leaked gas, just this piston can not move from transfer port (10); On the contrary, blocked gas, when squeezing into gas, can make action about this piston group (6), (12), thereby reached the purpose of switch inspection shaft lid from transfer port (10) if stop up (9).

In the drawings, respectively be set with tension spring (7), (11) between the piston wall at piston group (6), (12) and two ends, the effect of this spring is that latch (1), (4), (14), (17) are locked all the time.

In the drawings, the relative position of latch (1), (4), (14), (17) is the position of having inserted inspection shaft lid fixed frame (19), (20), the latch position that two-dot chain line among the figure is drawn is the position of withdrawing from inspection shaft lid fixed frame (19), (20), that is to say the position of opening inspection shaft lid (18), (21).

In the drawings, in inspection shaft lid fixed frame (19), (20), each correspondence have a latch locked groove, it can be allowed that latch cooperates to stretch into and withdraw from.

Claims

1. be with the anti-stealing manhole cover of gas-operated lock, this anti-stealing manhole cover comprises latch (1), (4), (14), (17), left and right piston group (6), (12), driving lever (2), (5), (13), (16), cylinder body (8) and obstruction (9) five parts; It is characterized in that: the isometrical cylinder body (8) of this anti-stealing manhole cover (18), (21) and round barrel shape is fixedlyed connected; In cylinder body (8), right each smart cooperation of one the first from left is installed a piston group (6), (12), its piston rod respectively passes the left and right sides sidewall of cylinder body (8), end with the driving lever (2) of rod-short, (5), (13), (16) is hinged respectively, and the middle part of its driving lever fixedly is hinged with inspection shaft lid (18) by jointed shaft (3), (15) respectively; The other end of its driving lever is hinged with an end of latch (1), (4), (14), (17) respectively.

2. the anti-stealing manhole cover of band gas-operated lock according to claim 1, it is characterized in that: on the periphery of cylinder body (8), one side has a transfer port (10), and the opposite side of this hole correspondence has the perforate of a band silking, and one of the installation that this perforate cooperates has the obstruction (9) of silking structure.

3. the anti-stealing manhole cover of band gas-operated lock according to claim 1 is characterized in that: respectively be set with tension spring (7), (11) between the piston wall at piston group (6), (12) and two ends.