CN2308639Y - Manhole cover anti-theft lock - Google Patents
Manhole cover anti-theft lock Download PDFInfo
- Publication number
- CN2308639Y CN2308639Y CN 96246182 CN96246182U CN2308639Y CN 2308639 Y CN2308639 Y CN 2308639Y CN 96246182 CN96246182 CN 96246182 CN 96246182 U CN96246182 U CN 96246182U CN 2308639 Y CN2308639 Y CN 2308639Y
- Authority
- CN
- China
- Prior art keywords
- nut
- screw rod
- hemisphere
- manhole cover
- groove
- 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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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model relates to a manhole cover anti-theft lock for a pipe, sewage, tap water or a cable pit. The utility model is composed of a hemisphere nut (1), a cylinder nut (3), a threaded rod (7), a baffle (5) and a wedge pin (6). When the nut is fastened with the threaded rod, the baffle is tightly clamped in a manhole base, and the fixing can be obtained. The cylinder nut can be opened only by a special tool. Simultaneously, one more protection is added on the cylinder nut by the hemisphere nut. When the hemisphere nut is opened, the cylinder nut arranged at the lower part can be seen, the abrasion of the cylinder nut can be reduced, and the threaded rod and the cylinder nut can not be loosened, slipped and dropped because of the external influence. The utility model has the advantages of simple structure, convenient construction and duplicate protection functions, and is the manhole cover anti-theft lock for preventing the lost of the manhole cover.
Description
The utility model relates to a kind of manhole antitheft lock that logical, sewage, tap water or cable shaft are used that is used to manage.
What generally use at present is not have the lock well lid, easily the wheel that is driven fast hit from or lose, casualties and traffic accident easily take place, bring loss and harm for national wealth and personal safety, even there are some to use anti-stealing manhole covers, but all because of its cost height, constructional difficulties and can't promoting.
The purpose of this utility model is to provide a kind of simple in structure, easy construction, plays double protection, prevents the manhole antitheft lock that well lid is lost.
The purpose of this utility model is achieved in that this manhole antitheft lock is made up of hemisphere nut (1), cylindrical nut (3), screw rod (7), plate washer (5), taper pin (6).Be a flower type groove on its hemisphere nut (1), inside is the hollow cone type, is the screw thread that matches with screw rod (7) outside near the awl mouth; Cylindrical nut (3) top is evenly equipped with the square projection, and in order to form the flower button, internal diameter is the screw thread that matches with screw rod (7); Screw rod (7) top is thick is partly with screw thread, and the bottom is a thin cylinder, has a groove at screw rod (7) near the bottom; Rectangle plate washer (5) inserts in the groove of screw rod (7) bottom, and taper pin (6) is squeezed into screw rod (7) plate washer (5) is fixed in the groove of screw rod (7) firmly.
Installation steps are: the appropriate location symmetry on existing well lid (2) is beaten the pair of lamina recess hole, penetrated rectangular channel at manhole cover base (4), to have the recess hole of the screw rod (7) of plate washer (5) by well lid (2), plate washer (5) is by the narrow groove of the rectangle at manhole cover base place, and screw rod (7) turned over certain angle, make plate washer (5) avoid the rectangular channel of manhole cover base (4), screw rod (7) top screws with cylindrical nut (3), plate washer (5) firmly is stuck on the well seat, use hemisphere nut (1) to tighten at last, make well lid pass through screw rod (7) and be fixed on the well seat at cylindrical nut (3).
Because after nut and screw rod are fastening, plate washer tightly snaps in the well seat, reach fixing, have only with special tool and cylindrical nut could be opened, simultaneously, the hemisphere nut has added protection together again on cylindrical nut, only open the hemisphere nut and can see following cylindrical nut, reduced the cylindrical nut wearing and tearing, made screw rod and cylindrical nut be unlikely to be subjected to ectocine and cause loosening, slippage and lose.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a hemisphere nut vertical view.
Fig. 3 is the cylindrical nut vertical view.
Below in conjunction with accompanying drawing the utility model being done one describes in detail.
In the utility model, hemisphere nut 1 integral diameter Φ 24mm, height is 12mm, the Φ 3mm shrinkage pool of dark 4mm is arranged in its surface, two pairs of tadpole grooves are arranged, afterbody upwards, the both sides groove respectively is SR5, SR8, inside is that M12 * 1.25mm screw cooperates with the screw top of screw rod 7, cylindrical nut 3 high 6mm, Φ 20mm, on the projection of six symmetries is arranged, wide 4mm, dark 2.5mm, inside is M12 * 1.25mm screw, above-mentioned two nuts are all handled through chromium plating, have strengthened antisepsis, and screw rod 1 top is M12 * 1.25mm screw thread, the bottom is the cylinder of Φ 8mm, under dark 7mm is arranged, wide 3mm, long 7mm groove, plate washer 5 is rectangles, is fixed on the screw rod 7 with taper pin 6.
Claims (3)
1. the utility model relates to a kind of manhole antitheft lock that logical, sewage, tap water or cable shaft are used that is used to manage, it is made up of hemisphere nut (1), cylindrical nut (3), screw rod (7), plate washer (5), taper pin (6), it is characterized in that having on the hemisphere nut (1) a flower type groove, inside is the hollow cone type, is the screw thread that matches with screw rod (7) outside near the awl mouth; Cylindrical nut (3) top is evenly equipped with projection, and internal diameter is the screw thread that matches with screw rod (7); Screw rod (7) top is thick is partly with screw thread, and the bottom is a thin cylinder, has a groove at screw rod (7) near the bottom; Rectangle plate washer (5) inserts in the groove of screw rod (7) bottom, and taper pin (6) is squeezed into screw rod (7) plate washer (5) is fixed in the groove of screw rod (7) firmly.
2. manhole antitheft lock according to claim 1 is characterized in that having on the cylindrical nut (3) the square projection of six symmetries.
3. manhole antitheft lock according to claim 1 is characterized in that hemisphere nut (1), cylindrical nut (3) all handle through chromium plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96246182 CN2308639Y (en) | 1996-12-25 | 1996-12-25 | Manhole cover anti-theft lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96246182 CN2308639Y (en) | 1996-12-25 | 1996-12-25 | Manhole cover anti-theft lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2308639Y true CN2308639Y (en) | 1999-02-24 |
Family
ID=33918952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96246182 Expired - Fee Related CN2308639Y (en) | 1996-12-25 | 1996-12-25 | Manhole cover anti-theft lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2308639Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527607A (en) * | 2013-10-24 | 2014-01-22 | 昆山市联昆热压板有限公司 | Nut |
| CN107476344A (en) * | 2017-08-30 | 2017-12-15 | 北京城市排水集团有限责任公司基建工程管理分公司 | A kind of multi-functional noiseproof manhole cover |
-
1996
- 1996-12-25 CN CN 96246182 patent/CN2308639Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527607A (en) * | 2013-10-24 | 2014-01-22 | 昆山市联昆热压板有限公司 | Nut |
| CN107476344A (en) * | 2017-08-30 | 2017-12-15 | 北京城市排水集团有限责任公司基建工程管理分公司 | A kind of multi-functional noiseproof manhole cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |