CN200958678Y

CN200958678Y - Prefabricated elbow protecting case

Info

Publication number: CN200958678Y
Application number: CN 200620091839
Authority: CN
Inventors: 谭乐田; 王成敏; 李子亮
Original assignee: 王成敏
Priority date: 2006-06-27
Filing date: 2006-06-27
Publication date: 2007-10-10
Anticipated expiration: 2016-06-27

Abstract

This utility model discloses a pre-casting type elbow shell used for heating power pipeline, which is composed of an upper and lower symmetrical shell, a smooth connecting edge is provided at the connecting position of the upper and lower half shell, and the outer side of connecting edge is provided with a plurality of bolt sockets. This utility model can make the outer shell, the insulating layer and the steel tube to be one whole body, which is waterproof, anti-seeping, and the appearance is beautiful and durable. The engineering cost isn't enhanced obviously, which is only one thirds of processing by large equipment, the advantages are that the construction is convenient, safe and eco-friendly. This utility model not only solves the shell of insulating layer, but also solves the elbow thermal insulation, material injection on the spot and foaming in place.

Description

Prefabricated bend pipe outer protecting shell

(1) technical field

The utility model belongs to the heat enginnering technical field, is specifically related to the bend pipe insulation protective case in a kind of heating power pipeline.

(2) background technique

Since the eighties in last century, in Heat Supply Engineering, high density polyethylene (HDPE) outer protecting shell, urethane foam insulation have been used gradually.Because it has prefabricated direct-buried, easy construction, price is suitable and advantage such as high insulating effect, has been used widely at present, almost has no option so far.Although this heat preserving method is very superior, the insulation of its bend pipe (also claiming elbow) part is a blank with protecting outward always.Its reason is exactly that this part proportion in whole heat insulating work is very little, but the complete sets of equipment of purchasing this type of construction is then invested huge, the income of accumulative total several years also is difficult to regain, and causes construction producer to be hung back, and forms a kind of outstanding for a long time hard nut to crack of not determining for a long time.Present way is to take a kind of makeshift of the old and new's combination, and straight tube is incubated with new method, and bent tube section is with the thermal insulation layer that peels on the straight tube, be cut into the piece that differs in size, apply piecewise on bend pipe, twine with glass fibre cloth one then, carelessly scrubbing brush last layer resin or lead oil are just settled.This method was both non-moistureproof, and was also not impervious, because riddled with gaping wounds, let alone sturdy and durable.Both sides' dispute main cause when this problem has often become final acceptance of construction.

(3) summary of the invention

The purpose of this utility model provides and a kind ofly can be prefabricated in the factory, the prefabricated bend pipe outer protecting shell of material feeding foamed heat insulating at the construction field (site).The technical solution adopted in the utility model is: prefabricated bend pipe outer protecting shell is made of the two halves housing of upper and lower symmetry, have smooth to edge fit at the upper and lower two halves housing place of connecting, be provided with a plurality of bolt nests in the outside, be used for tap bolt upper and lower two jaws are connected edge fit.In the neutral position inboard of curved section a small column is arranged, the height of small column is identical with the thickness of thermal insulation layer, and small column withstands on the steel pipe during use, guarantees the interior thermal insulation layer of outer protecting shell under the position-limiting action of small column, and thickness everywhere can uniformity.

The utility model can make outer protecting shell, thermal insulation layer and steel pipe constitute an integrated entity, its waterproof, impervious, beautiful shape, sturdy and durable.Its engineering cost there is no obvious raising, with main equipment processing, still not enough its 1/3rd, more main advantage is its easy construction, safety and environmental protection.It has not only solved the outer of thermal insulation layer and has protected, and it has solved the problem that bend pipe is incubated on-the-spot material feeding, foam-in-place what is more important.

(4) description of drawings

Fig. 1 is the planimetric map of the utility model list jaw;

Fig. 2 is that Fig. 1 is along the sectional view of the direction of arrow and the outline drawing of single jaw;

Fig. 3 is the sectional view that two jaws connect bent intermediate place, back;

Fig. 4 fills schematic representation behind the insulation filler, the filler position when figure middle and lower part dash area is represented R=D, the filler position when the top dash area is represented R=1.5D for the utility model;

Fig. 5 is that Fig. 4 is along the sectional view of the direction of arrow and the outline drawing of single jaw;

Fig. 6 is the sectional drawing that Fig. 4 two jaws fasten the intermediate portion, back;

Fig. 7 is the bolted structural representations of upper and lower two jaws;

Fig. 8 is the left view of Fig. 7.

(5) embodiment

Prefabricated bend pipe outer protecting shell adopts high-density polyethylene material to make, and uses a compression moulding of mould, and the upper and lower two halves housing of bend pipe outer protecting shell is symmetry fully, owing to also be symmetrical about bend pipe, upper and lower two halves housing is actually congruence.Again because the utility model is applicable to the bend pipe of different curvature radius, so it can make die cost and quantity in stock greatly reduce.Reduced cost of production.

Bend pipe in the heat preservation construction has two kinds of radius of curvature, i.e. R=D and R=1.5D.Wherein R is the radius of curvature of bend pipe, and D is the external diameter of bend pipe.Make prefabricated bend pipe outer protecting shell be fit to the bend pipe of these two kinds of radius of curvature simultaneously, the cross section of outer protecting shell will form the sub-elliptical shape.The drawback of doing like this is the bend pipe that no matter is used for which kind of radius of curvature, and its thermal insulation layer materials all have slightly and increase, but this a spot of to pay with its conveniently comparing of bringing be very little.

Prefabricated bend pipe outer protecting shell is made of corresponding upper and lower two halves housing, and the two halves housing place of connecting has smooth to edge fit 2, the thickness of edge fit 2 has been thickeied many than other shell walls 1, has reached 13mm.This way is that the rigidity of outer protecting shell is strengthened, and is indeformable, non-warping, makes upper and lower two halves housing more identical in conjunction with getting.During site operation, coincide tighter tightlyer in order to make to edge fit, do not seep water, spillage (as yet not foaming polyurethane) not, on to edge fit, be coated with the last layer polyester resin earlier, when the resin ot-yet-hardened, screw 6-12 tap bolt 5 for 3 li at the bolt nest of reserving again, two jaw bend pipe outer protecting shells are finally united two into one.The small column 4 of inboard, outer protecting shell bent intermediate place withstands on the steel pipe, makes in the outer protecting shell thermal insulation layer 6 thickness everywhere even substantially.

On-the-spot material feeding foaming is more simple, only on outer protecting shell, bore the aperture of a φ 20, the polyurethane foam material for preparing is injected shell, when in the slit of the shell at housing two ends and pipe during little existing foam, the proof foam is full, after the solid shape foam that will overflow this moment is used the cutter equating, carefully coats resin on the slit, at last that material hole is stifled tight with resin, installment work is promptly accused and is finished.

Claims

1, a kind of prefabricated bend pipe outer protecting shell, it is characterized in that: it is made of the two halves housing of upper and lower symmetry, has smoothly to edge fit (2) at the upper and lower two halves housing place of connecting, and is provided with a plurality of bolt nests (3) in the outside to edge fit (2).

2, prefabricated bend pipe outer protecting shell according to claim 1 is characterized in that: in the neutral position inboard of bend pipe outer protecting shell a small column (4) is arranged.