CN203782752U - Manhole cover lifting arm structure with safety lock - Google Patents
Manhole cover lifting arm structure with safety lock Download PDFInfo
- Publication number
- CN203782752U CN203782752U CN201420028474.2U CN201420028474U CN203782752U CN 203782752 U CN203782752 U CN 203782752U CN 201420028474 U CN201420028474 U CN 201420028474U CN 203782752 U CN203782752 U CN 203782752U
- Authority
- CN
- China
- Prior art keywords
- manhole cover
- mounting plate
- lifting arm
- latch
- manhole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model relates to a manhole cover lifting arm structure with a safety lock. The manhole cover lifting arm structure comprises a vertical-axis casing fixed to one side of a manhole, wherein an L-shaped lifting arm is inserted into the casing; a manhole cover is hung on the L-shaped lifting arm; an upper mounting plate and a lower mounting plate are arranged on the casing; a vertical-axis bolt is inserted into the upper mounting plate and the lower mounting plate; a limiting part is arranged on the bolt and between the upper mounting plate and the lower mounting plate; the bolt is sleeved with a spring; the spring is arranged between the limiting part and the lower mounting plate; a lock plate is arranged close to the casing on the L-shaped lifting arm; a lock hole into which the bolt can be inserted is formed in the lock plate. The manhole cover lifting arm structure has the advantages that the safety lock can be used for preventing the manhole cover from swinging in an open state, so that the open state of the manhole cover is more stable, convenience is brought to operation of workers, and the workers are protected from being injured.
Description
Technical field
The utility model belongs to pressure vessel auxiliary equipment technical field, particularly relates to a kind of manhole cover arm cap-opening mechanism.
Background technology
Manhole is a kind of often with the duct of lid, and people thus hole passes in and out the light current well of arranging road, boiler, sewer pipe, comprising in addition telecommunications, cable television use, the inner passage of large bridge maintenance use etc.In prior art, the mounting structure of the port lid of manhole is: the side at manhole is provided with sleeve pipe, the axis of sleeve pipe vertically arranges, on sleeve pipe, be set with L shaped arm, on L shaped arm, lift manhole cover, manhole cover utilizes securing member to be fixed on manhole, in the time that manhole unloads, by the mode that manually pulls pivoted arm rotation, manhole cover is removed.
There is following technical problem in the manhole cover of said structure: state that manhole cover is opened in use, manhole cover is without fixed structure, and manhole cover is easily subject to external force and accidental movement, and the heavier manhole cover of weight moves can affect workman's work, use inconvenience, staff also can damage.
Summary of the invention
The utility model provides a kind of simple in structure, easy to use, the position that can fix the manhole cover under open mode for solving the technical problem existing in known technology, so that the manhole cover arm cap-opening mechanism that workman uses.
The technical scheme that the utility model is taked for the technical problem existing in solution known technology is: a kind of manhole cover boom structure with safety lock, comprise the vertical sleeve pipe of axis that is fixed on manhole one side, in described sleeve pipe, be fitted with L shaped arm, on described L shaped arm, mount manhole cover, it is characterized in that: described sleeve pipe is provided with upper mounting plate and lower installation board, on described upper mounting plate and lower installation board, be fitted with the vertical latch of axis, described latch is provided with limiting section, described limiting section is located between described upper mounting plate and lower installation board, on described latch, be set with spring, described spring is located between described limiting section and lower installation board, on described L shaped arm, be provided with jam plate near described sleeve pipe, described jam plate is provided with the lockhole that can make described latch insert.
The utility model can also adopt following technical scheme:
Described latch is L shaped latch.
Advantage and the good effect that the utlity model has are: because the utility model adopts as above technical scheme, design a kind of manhole cover boom structure with safety lock, safety lock can prevent that manhole cover from rocking under the state of opening, thereby it is more stable to make us port lid open mode, facilitate workman to operate, and the workman that can not damage.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure: 1, sleeve pipe; 2, manhole cover; 3, L shaped arm; 4, upper mounting plate; 5, lower installation board; 6, latch; 7, limiting section; 8, spring; 9, jam plate; 10, lockhole.
Detailed description of the invention
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows
Refer to Fig. 1, a kind of manhole cover boom structure with safety lock, comprise the vertical sleeve pipe 1 of axis that is fixed on manhole one side, it is manhole one side that sleeve pipe 1 is fixed on the body such as boiler that manhole cover 2 is installed, in the present embodiment, the manhole cover that manhole cover 2 is boiler, sleeve pipe 1 is welded on boiler body.In described sleeve pipe 1, be fitted with L shaped arm 3, one end of L shaped arm 3 is inserted on sleeve pipe 1, and L shaped arm 3 can rotate.On described L shaped arm 3, mounted manhole cover 2, manhole cover 2 is for capping manhole.Described sleeve pipe 1 is provided with upper mounting plate 4 and lower installation board 5, on described upper mounting plate 4 and lower installation board 5, be fitted with the vertical latch of axis 6, described latch 6 is provided with limiting section 7, described limiting section 7 is located between described upper mounting plate 4 and lower installation board 5, on described latch 6, be set with spring 8, described spring 8 is located between described limiting section 7 and lower installation board 5, on described L shaped arm 3, is provided with jam plate 9 near described sleeve pipe 1, and described jam plate 9 is provided with the lockhole 10 that can make described latch 6 insert.
Manhole cover 2 buckle closures are on manhole, the upper end of latch 6 is pushed up and is pressed on jam plate 9 under the effect of spring 8, open manhole cover 2, rotate L shaped arm 3, the upper end of latch 6 is relative with the lockhole 10 on jam plate 9, latch 6 upper end under the effect of spring 8 is inserted in the lockhole 10 of jam plate 9, completes the fixing of sleeve pipe 1 and L shaped arm 3 relative positions with this, realizes the locked of manhole cover 2.
In the present embodiment, described latch 6 is L shaped latch, is convenient to workman latch is extracted in lockhole.
Above-mentioned embodiment is only to functional descriptions of the present utility model; not design of the present utility model and scope are limited; do not departing under the prerequisite of the utility model design philosophy; various distortion and improvement that those skilled in the art make the technical solution of the utility model, within all dropping on protection domain of the present utility model.
Claims (2)
1. one kind has the manhole cover boom structure of safety lock, comprise the vertical sleeve pipe of axis that is fixed on manhole one side, in described sleeve pipe, be fitted with L shaped arm, on described L shaped arm, mount manhole cover, it is characterized in that: described sleeve pipe is provided with upper mounting plate and lower installation board, on described upper mounting plate and lower installation board, be fitted with the vertical latch of axis, described latch is provided with limiting section, described limiting section is located between described upper mounting plate and lower installation board, on described latch, be set with spring, described spring is located between described limiting section and lower installation board, on described L shaped arm, be provided with jam plate near described sleeve pipe, described jam plate is provided with the lockhole that can make described latch insert.
2. the manhole cover boom structure with safety lock according to claim 1, is characterized in that: described latch is L shaped latch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420028474.2U CN203782752U (en) | 2014-01-17 | 2014-01-17 | Manhole cover lifting arm structure with safety lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420028474.2U CN203782752U (en) | 2014-01-17 | 2014-01-17 | Manhole cover lifting arm structure with safety lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203782752U true CN203782752U (en) | 2014-08-20 |
Family
ID=51318954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420028474.2U Expired - Fee Related CN203782752U (en) | 2014-01-17 | 2014-01-17 | Manhole cover lifting arm structure with safety lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203782752U (en) |
-
2014
- 2014-01-17 CN CN201420028474.2U patent/CN203782752U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20160117 |
|
| EXPY | Termination of patent right or utility model |