CN2758330Y

CN2758330Y - Low cost antitheft manhole cover

Info

Publication number: CN2758330Y
Application number: CN 200420115015
Authority: CN
Inventors: 李新生
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-10-29
Filing date: 2004-10-29
Publication date: 2006-02-15
Anticipated expiration: 2014-10-29

Abstract

The utility model relates to an antitheft manhole cover for a drainage well. Because the existing cast iron cover is frequently stolen to sell by some lawbreakers, people and vehicles slump into some manholes without covers frequently to cause human bodies' casualty and the damage of the vehicles; the utility model is invented in order to prevent manhole covers from stealing aiming at the present state. The main starting point is on the basis of keeping former load bearing strength of the manhole cover: firstly, to make the lawbreakers is not interested in stealing the manhole cover; secondly, the cost of using iron for the manhole cover is decreased greatly. The main improved case is that the bearing strength is increased by making use of a reinforced concrete structure of a frame style; the edge is thick, and the center is thin; the utility model is arched upwards. The surface of the utility model is filled with stone materials of cement and sand after smeared with a thin steel plate, and otherwise the raising hole of the manhole cover is reshaped to a narrow hole and matched with a special tool. The specific frame of the utility model is characterized in that the main frame is arranged in the arch radial type outwards, and the arrangement of which takes the center of the manhole cover as a circle center. The outer ring has a frame, and a reinforcing frame is formed by combining a concentric hexagon frame and an extended outside auxiliary reinforcing frame. The manhole cover has the main characteristics of low cost, high strength and good antitheft effect.

Description

A kind of low-cost anti-stealing manhole cover

Technical field

The utility model relates to city municipal administration capital construction plumbing facility, particularly relates to the anti-stealing manhole cover that a kind of plumbing well is used.

Background technology

The well lid of the plumbing well in traditional municipal infrastructure generally all is the cast iron manufacturing, has brought into play important effect for these years.But because of being ironwork, often stolen that taking away disposes of stolen goods sells for money, so personnel and vehicle often take place and fall into accident in the well in some uncovered wells, cause the injures and deaths of the person and the damage of vehicle by some lawless persons.Stolen in order to prevent, improved theft-proof type well lid occurred, but improved basic way is just carried out certain reinforcing, wherein be that well lid and walling crib are added the rotating shaft integral production mostly, a spot of is to install iron chains additional, and the product that locks is also arranged.The improvement of these well lids is not stopped though stolen phenomenon reduces to some extent, still smashes, sticks up bad and whole pilferage of removing formula every now and then, and basic reason is still because cast iron can be sold the dirty money that becomes.And for antitheft, increase many reinforcement measure iron, in order to meet resistance to compression load-bearing standard, increased medial surface thickness simply again, its result, more than when making the cast iron of input non-anti-theft on the contrary, steal one with sold a little money than going back multipotency in the past, so, stolen phenomenon can not be eradicated always, simultaneously, with the increasing that the increase of iron amount has brought cost, this is again a conspicuous problem.

Summary of the invention

The purpose of this utility model is the radical change above-mentioned condition, and its total starting point is on the basis of not weakening the original load bearing stength of well lid, the one, and allow those lawless persons lose interest in to stealing well lid, the 2nd, reduce well lid iron cost significantly.

Concrete solution of the present utility model is:

Utilize tower structure to improve bearing strength, thick and center, edge is thin, upwards arches upward, and the surface utilizes cement sandstone material to fill after applying sheet iron plate, and to change shape be long and narrow hole and join special tool for the hole of mentioning of well lid in addition.In this way, for spiriting away and mischief-making stealer, can not go smoothly easily, for professional stealer, its iron-holder significantly reduces does not sell the dirty price value, can not use by oneself again, does not steal so can stop hand automatically.

Concrete structure of the present utility model comprises:

(1) main frame: is that radial arrangement is outwards done in the center of circle by 6 channel bars with the well lid center, and curved arching upward rolled into the frame of a loop section as well lid with the bigger width channel-section steel consistent with the well lid design thickness, again in downhand welding under the arched framework;

(2) reinforcement rack: in the appropriate position of main frame radius of circle, laterally become a concentric hexagon with little angle steel weld all around, should burn-on as auxiliary reinforcement frame with little angle steel and frame in midpoint on hexagonal each limit again, be used to strengthen main frame intensity and accept top steel plate or net sheet, can can do further complementary reinforcement with reinforcing bar for the gap of master, benefit framework according to using position difference and the size of selecting angle steel for use simultaneously;

(3) will roll and non-slip process be arranged and leave the anti-skidding well lid face of the supporting circle steel sheet that the hole is mentioned in two bar shapeds, tiling is welded on the main frame, perhaps adopt fritter rule steel plate, splicing on main frame to replace checkered plates, two bar shapeds are mentioned the hole along the discharging of diametric(al) symmetry, open at the distance edge about 1/5 diameter place;

(4) above-mentioned hollow typing main frame water silt stone is filled, the hole is mentioned in corresponding bar shaped, will leave down the big little smooth dovetail groove of in the obturator;

(5) supporting anti-stealing manhole cover, well circle also adopt similar structure fabrication, its cross section to be that " protruding " font, the inside be the filling concrete sandstone also; Mention well lid for convenience, lifting rod is one can inject the up-small and down-big trapezoidal head rod of mentioning the hole, respectively there is one can slide up and down and to be subjected to the arm of force along with bathrocephaly is open on the both sides of bar head, the arm of force expansible that is subjected to of both sides will cover pull-up when firmly lifting, the similar expansion bolt of its principle.

The utility model, can be directly used on the circle of existing well along improving a little lid.It changes method: the last plane of the annular ring on well lid limit is amplified outwards has one to move back platform, makes it can fall to being placed on the old well circle.

Main feature of the present utility model is:

(1) antitheft.The well lid edge is thicker, embeds during use in the circle of well, directly lid can not be levered up from the limit of well lid; The long and narrow special hole of mentioning on the well lid, up-narrow and down-wide and interface are not hook of chamfered transition, and general lancet can not stretch into and hook, and can only just can open with two supporting special-purpose lifting rods; Weight in the well lid is sandstone cement mostly, and pin dirty price value is not high, and using by oneself does not have the place yet.So, no matter be that class robber to interest little, all can stop hand automatically and not steal.

(2) cost is low.Reduce with the iron amount, add it is that normal temperature is made, as the high temperature casting, angle steel, channel-section steel and reinforcing bar and net sheet still can not select for use some leftover bits and pieces to weld system, so cost can descend greatly.

(3) intensity can guarantee.Owing to be special steel and concrete structure, area is little, the situation of loaded vehicle crushing generally can not occur.

Description of drawings

Accompanying drawing 1 is looked the combination signal for the master of the utility model well lid and supporting walling crib;

Accompanying drawing 2 is for overlooking the combination signal;

Accompanying drawing 3 is the main frame construction signal of looking;

Accompanying drawing 4 is for overlooking the frame construction signal;

Accompanying drawing 5 adds panel or the signal of net sheet for overlooking framework;

Accompanying drawing 6 is supporting special-purpose well lid lifting rod combination signal, and wherein, Fig. 6-1 is the main situation of folding of looking, and Fig. 6-2 arm of force when lifting opens situation, and Fig. 6-3 folds situation for side-looking;

Accompanying drawing 7 is the supporting structural representation of looking and overlooking the modified well lid master with walling crib.

Among above-mentioned each figure, 1 is well lid, and 2 is supporting convex walling crib, 3 is the well lid frame, and 4 are radiation arch form frame, and 5 are center welding disk, 6 is horizontal reinforced bulkhead, and 7 for mentioning the long and narrow hole that well lid is used, and 8 are auxiliary reinforcement frame, 9 is well lid face checkered plates, and 10 is the combinational network sheet, and the handle of bar is mentioned in 11 special uses, 12 is lifting rod, 13 are the expandable arm of force that is subjected to, and 14 is the pull bar bathrocephaly, and 15 for supporting at the table top that moves back with walling crib.

The specific embodiment

The utility model is from the antitheft and consideration that reduces cost, its well lid and walling crib all adopt the concrete steel shelf structure, contrast accompanying drawing 1, its well lid 1 be around the arch form frame construction of thick intermediate thin, and walling crib 2 is a steel plate convex compression-molded structures, all filling concrete sandstone moulding inside, compressive strength is higher, and anti-theft feature is better.For newly-built plumbing well, the well lid walling crib can be provided together, and for the transformation at usefulness plumbing well, just change well lid, this well lid that changes should be by the mode of Fig. 7, the last plane of the annular ring at well lid edge amplified outwards has one to move back platform, is used to fall to being placed on old well circle and goes up and get final product.

Contrast accompanying drawing 3, accompanying drawing 4 and accompanying drawing 5, the specific embodiment of the utility model well lid is as follows:

(1) section bar is prepared.To make the steel plate of grooved arch frame 4, the horizontal reinforced bulkhead 6 of angle type and grooved well lid frame 3, shape roll forming on request should also be pressed shape need with the convex material of making walling crib 2 simultaneously and make moulding.These section bars can entrust steel rolling mill rolling, also can be solved by the market supply of material.Certainly, also can select for use corner blanking segmentation splicing to use, different section bars prepares to have influence on the difference of cost.For the net sheet 10 of well lid face checkered plates 9 or splicing, also rolling by designing requirement.

(2) framework moulding.Weld system by Design Requirement Drawing, the outside of main frame is a circle frame 3, the inside is the circular-arc main structure frame 4 of center radiation to arch, reinforcement rack therebetween is made of with the auxiliary reinforcement frame 8 that the Ge Bian mid point is connected with frame the hexagon frame 6 of lateral arrangement, and all the other neutral gears can add some lacing wires according to stressing conditions makes it to reach producing balanced forces.

(3) concrete is filled.With above-mentioned setting framework and convex walling crib, under the shaping of filling mould, carry out the concrete vibrations and fill.

(4) maintenance check.Fill the back and do abundant maintenance by the maintenance criteria of reinforced concrete structure.

(5) design and produce by Fig. 6 and mention pull bar.

(6) the improvement repetition above-mentioned steps by Fig. 7 is produced on the replacement well lid of using well.

Embodiment 1:

With the combination signal of attached Fig. 1 and 2, the utility model well lid and walling crib is supporting, be installed in the aboveground use of newly-built plumbing.

Embodiment 2:

The well lid that having shown in the accompanying drawing 7 moved back platform directly is placed in to have now and is getting final product with on the walling crib of plumbing.

Claims

1, a kind of low-cost anti-stealing manhole cover, it is the steel concrete product, the concrete structure that it is characterized in that it comprises main frame, reinforcement rack, anti-skidding well lid face steel sheet and cement sandstone filler, wherein, main frame is curved to arch upward, frame is a loop section of being rolled by channel-section steel, and mid portion is that radial arrangement is outwards done in the center of circle with channel bar with the well lid center, and following downhand welding is dead; The reinforcement framework is to constitute with the concentric hexagon of main frame and with little angle steel bar that frame connects by one, described hexagon is welded in the appropriate position of arch main frame radius, laterally with little angle steel weld all around, described little angle steel bar is welded in the midpoint on hexagonal each limit; Anti-skidding well lid face and framework coupling, tiling is welded on the main frame, and rolling above has non-slip process, and leaves two symmetrical bar shapeds of discharging and mention the hole on diametric(al); The cement sandstone are filled in the whole framework by space that arch form contains.

2, by the described a kind of low-cost anti-stealing manhole cover of claim 1, it is characterized in that: further complementary weld reinforcement can be done with reinforcing bar in the gap for master, benefit framework.

3, by the described a kind of low-cost anti-stealing manhole cover of claim 1, it is characterized in that: the panel of anti-skidding well lid can be welded on the main frame by the splicing of fritter rule steel plate and replace.

4, by the described a kind of low-cost anti-stealing manhole cover of claim 1, it is characterized in that: supporting described anti-stealing manhole cover, the well circle also adopts the structure fabrication of filling concrete sandstone, and its cross section is " protruding " font.

5, by the described a kind of low-cost anti-stealing manhole cover of claim 1, it is characterized in that: the lifting rod of supporting well lid, be one and can insert the up-small and down-big trapezoidal head rod of mentioning the hole, respectively have one can slide up and down and can be subjected to the arm of force along with bathrocephaly is open on the both sides of bar head, this two is subjected to arm of force expansible will cover pull-up when firmly lifting.

6, by the described a kind of low-cost anti-stealing manhole cover of claim 1, it is characterized in that: amplify on the last plane of the annular ring on well lid limit outwards has one to move back platform, can directly fall to being placed on the old well circle.