CN105857983A

CN105857983A - Manhole cover

Info

Publication number: CN105857983A
Application number: CN201610291333.3A
Authority: CN
Inventors: 刘亚夫; 王朋涛; 李俊青
Original assignee: GRANDE-TEK FLOW CONTROL Co Ltd
Current assignee: GRANDE-TEK FLOW CONTROL Co Ltd
Priority date: 2016-05-05
Filing date: 2016-05-05
Publication date: 2016-08-17

Abstract

A manhole cover comprises an upper cover body, a lower stamping cover body and a cover bush ring. A first turned edge extending upwards is formed at the rim of the lower stamping cover body in a stamping manner. The outer rim of the first turned edge is provided with the cover bush ring in a matched manner. An annular sealing groove with a downward opening is formed in the bottom of the cover bush ring in a turning manner. The bottom of the first turned edge and the lower portion of the inner rim of the cover bush ring are fixed through welding. The upper cover body is arranged above the lower cover body. According to the manhole cover, the first turned edge is arranged on the lower cover body and plays the function of a reinforcing rib, and the strength of the whole manhole cover can be improved through fixing of the first turned edge and the cover bush ring; and meanwhile the upper cover body is additionally arranged, compared with a manhole cover of a single layer structure, the manhole cover of a double-layer structure is higher in strength and longer in service life, meanwhile the double-layer structure can be subjected to heat preservation treatment, high-strength plastic can be selected as the material of the upper cover body of the manhole cover, and due to the fact that the plastic material is light, the mass of the manhole cover is reduced effectively without lowering the strength of the manhole cover.

Description

Manhole cover

Technical field

The present invention relates to a kind of seal member, particularly relate to a kind of manhole cover.

Background technology

At present bulk bin and tank container all can be equipped with one or more manhole, this manhole be generally used for bulk bin and Cleaning within tank container, safeguard and check, and for bulk bin and the sealing of tank container, manhole typically sets There is manhole cover.Existing manhole cover typically has monolayer and double-deck two kinds of patterns.And monolayer manhole cover is simply by single-layer cover and lid grommet Between simply weld, intensity is relatively low, thus service life is shorter, easily there is potential safety hazard.Separately there is double-deck manhole cover It is to weld together after the two direct punch formings of block plate, the straight forming in punching course of the seal groove on manhole cover, although Production technology is simple, but owing to the fillet of punching press causes the sealing ring in seal groove easily to come off, and sealing ring is by welding shadow Ring and deform thus affect sealing.

Summary of the invention

It is an object of the invention to provide a kind of intensity height, the manhole cover of favorable sealing property.

For solving above-mentioned technical problem, the present invention provides a kind of manhole cover, including upper cover, punching press lower cover and lid grommet, punching The edge punch forming of pressure lid has upwardly extending first flange, the first flange outer rim to be fitted with a lid grommet, and described lid serves as a contrast Turning molding one annular seal groove that Open Side Down bottom ring, bottom the first flange with between bottom, lid grommet inner edge by welding Fixing, described upper cover is arranged on above lower cover.

Preferably, the edge of described upper cover is provided with in the second flange downwardly extended, the second flange outer rim and the first flange Edge matches.

Preferably, it is fixed-link between described second flange and the first flange.

The dismounting and change of upper cover for convenience, is removable link between described second flange and the first flange.

Preferably, the edge of described upper cover is arranged on lid grommet end face.

Preferably, described first flange height flushes with lid grommet.

Preferably, described upper cover is nonmetallic materials.

In order to improve the heat-blocking action of whole man's port lid, also include that thermal insulation layer, described thermal insulation layer are arranged on upper cover and punching Between pressure lid.

The invention have the benefit that to cover under this manhole cover and be provided with the first flange, the first flange serves reinforcement Effect, by the fixing intensity that can improve whole man's port lid with lid grommet；Add upper cover, this double-decker and monolayer simultaneously The manhole cover of structure compares that its intensity is high, service life is longer, and double-decker can do isothermal holding simultaneously, and its upper cover is chosen as The plastics of high intensity, owing to plastic material is relatively light, effective its quality of reduction on the premise of not reducing manhole cover intensity.

Accompanying drawing explanation

Accompanying drawing 1 is the domatic figure of manhole cover of embodiment 1；

Accompanying drawing 2 is the domatic figure of manhole cover of embodiment 2；

Label declaration: 1-lower cover；11-the first flange；2-lid grommet；21-annular seal groove；3-upper cover；31-the second flange；

Detailed description of the invention

By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with embodiment And coordinate accompanying drawing to be explained in detail.

Embodiment 1

Referring to the drawings 1, the present invention provides a kind of manhole cover, including lower cover 1 and lid grommet 2, lower cover 1 punch forming, the limit of lower cover 1 Edge punch forming has upwardly extending first flange 11, the first flange 11 outer rim to be fitted with a lid grommet 2, described lid grommet 2 end Portion's turning molding one annular seal groove 21 that Open Side Down, uses weldering between the first flange 11 bottom and bottom, lid grommet 2 inner edge Connect fixing.

The lower cover 1 of this manhole cover is positioned at lid grommet 2 inner underside, reserves the space being positioned at manhole cover upper end, increases people The operable space of port lid, lower cover 1 adds the first flange 11, adds the contact surface between the first flange 11 and lid grommet 2 Long-pending, the pad of flange and lid grommet can be increased, it is ensured that both fixedly secure, and increase frictional force, and flange also increases simultaneously The intensity of manhole cover.

In the present embodiment, described first flange 11 height flushes with lid grommet 2, so can guarantee that the attractive in appearance of appearance, this Bright not limiting the first flange 11 height, the height of the first flange 11 can also be lid grommet 2 half highly, as long as can reach The purpose of the contact area between increase lower cover 1 and lid grommet 2, certainly, further, flange can bypass whole lid lining Ring, further promotes firmness.

This manhole cover also includes that upper cover 3, the edge of described upper cover 3 are provided with the second flange 31 downwardly extended, the second flange 31 outer rims match with the first flange inner edge.

In the present embodiment, using and be welded and fixed between described second flange 31 and the first flange 11, the present invention does not limit Connected mode between second flange 31 and the first flange 11, can also be bonding between the two, can be again riveting, screw thread chain Connecing or buckle link etc., as long as playing, both being connected fixing purpose.

In the present embodiment, after upper cover is fixing, the end face of upper cover flushes with the end face of lid grommet, by the setting of upper cover, Improve the heat-blocking action of whole man's port lid, some heat-barrier materials can be added between upper cover and lower cover and promote heat insulation effect further Really, the present invention being not particularly limited.Owing to upper cover is not one-body molded with lower cover, in this enforcement the material of upper cover can with under Lid difference, lower cover primarily serves the effect of framed intensity, the most convenient operation of upper cover, heat-blocking action, therefore in the present embodiment, The material of described upper cover 3 can be the nonmetallic materials of high intensity, and these nonmetallic materials can be plastics, and these plastics can be poly- Formaldehyde, polyformaldehyde has heat resistanceheat resistant intensity, bending strength, the equal advantages of higher of endurance life, has the title of " plastics steel ", Ke Yi Not reducing the effective weight reducing manhole cover on the premise of intensity, meanwhile, upper cover divides at outer surface and blows Exposure to Sunlight, and the life-span can be less than Lower cover, can simply be replaced, and promotes the life-span of whole manhole cover.

Embodiment 2

Referring to the drawings 2, the present invention provides a kind of manhole cover, including lower cover 1 and lid grommet 2, lower cover 1 punch forming, lower cover 1 Edge punch forming has upwardly extending first flange 11, the first flange 11 outer rim to be fitted with a lid grommet 2, described lid grommet 2 Bottom turning molding one annular seal groove that Open Side Down 21, uses between the first flange 11 bottom and bottom, lid grommet 2 inner edge It is welded and fixed.

This manhole cover also includes that upper cover 3, the edge of described upper cover 3 are arranged on lid grommet 2 end face.

In the present embodiment, using and be welded and fixed between described upper cover 3 and lid grommet 2, the present invention does not limit upper cover 3 and lid Connected mode between grommet 2, can also be bonding between the two, can be again riveting, screw thread link or buckle link etc., only Play and both are connected fixing purpose.

In the present embodiment, by the setting of upper cover, improve the heat-blocking action of whole man's port lid, can upper cover and lower cover it Between add some heat-barrier materials and promote effect of heat insulation further, the present invention is also not particularly limited.Owing to upper cover with lower cover is not One-body molded, in this enforcement, the material of upper cover can be different from lower cover, and lower cover primarily serves the effect of framed intensity, and upper cover is main Being convenient operation, heat-blocking action, therefore in the present embodiment, the plastics that material is high intensity of described upper cover 3, these plastics can be Polyformaldehyde, polyformaldehyde has heat resistanceheat resistant intensity, bending strength, the equal advantages of higher of endurance life, has the title of " plastics steel ", permissible The effective weight reducing manhole cover on the premise of not reducing intensity, meanwhile, upper cover divides at outer surface and blows Exposure to Sunlight, and the life-span can be little In lower cover, can simply be replaced, promote the life-span of whole manhole cover.

The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this Equivalent structure or equivalence flow process that bright description and accompanying drawing content are made convert, or are directly or indirectly used in other relevant skills Art field, is the most in like manner included in the scope of patent protection of the present invention.

Claims

1. a manhole cover, it is characterised in that include upper cover, punching press lower cover and lid grommet, the edge punch forming of punching press lower cover Upwardly extending first flange, the first flange outer rim is had to be fitted with a lid grommet, turning molding one opening bottom described lid grommet Downward annular seal groove, passes through to be welded and fixed bottom the first flange and between bottom, lid grommet inner edge, and described upper cover is arranged on Above lower cover.

Manhole cover the most according to claim 1, it is characterised in that the edge of described upper cover is provided with second downwardly extended and turns over Limit, the second flange outer rim matches with the first flange inner edge.

Manhole cover the most according to claim 2, it is characterised in that for fixing chain between described second flange and the first flange Connect.

Manhole cover the most according to claim 2, it is characterised in that be knockdown chain between described second flange and the first flange Connect.

Manhole cover the most according to claim 1, it is characterised in that the edge of described upper cover is arranged on lid grommet end face.

6. according to the manhole cover described in claim 1 to 5 any one, it is characterised in that described first flange height and lid lining Ring flushes.

7. according to the manhole cover described in claim 1 to 5 any one, it is characterised in that described upper cover is nonmetallic materials.

Manhole cover the most according to claim 6, it is characterised in that described upper cover is nonmetallic materials.

9. according to the manhole cover described in claim 1 to 5 any one, it is characterised in that also include thermal insulation layer, described thermal insulation layer It is arranged between upper cover and punching press lower cover.

Manhole cover the most according to claim 6, it is characterised in that also include that thermal insulation layer, described thermal insulation layer are arranged on upper cover And between punching press lower cover.