CN204828985U - Concrete duct for building - Google Patents

Abstract

The utility model is suitable for a technical field of the prefabricated tubular product of concrete cement, discloses a concrete duct for building, including the body chamber way inside with being located the body, be equipped with tenon and tongue -and -groove respectively at the both ends of body, the pipe diameter cross -section of body be square, the chamber pipe diameter cross -section of saying be circular, the body in be equipped with the reinforcing bar pipe support, the reinforcing bar pipe support be the cube, the reinforcing bar pipe support in pour into the fibre concrete that is used for making the body. The utility model provides a pair of concrete duct for building, it is rational in infrastructure, adopt the circular cavity way, square pipe and round pipe combine together, and not only make reinforced concrete pipe simple to operate, cost of transportation hang down, and the dough stability is high, the external pressure load ability improves, also adopt the framework of steel reinforcement and the main part of the straight reinforcing bar of distribution homogeneous as the body of square simultaneously to further improve reinforced concrete pipe's weight bearing power, improve result of use and market competition that the square was managed.

Description

A kind of concrete duct for building

[technical field]

The utility model relates to the prefabricated tubing of a kind of concrete cement, particularly one concrete duct for building.

[background technique]

Current concrete prefabricated materials used for cement pipes adopts the design of unique round tube, therefore from technique to equipment is to arrange according to the feature design of round structure, and as technique adopts, centrifuge method, roller-suspending, vertical vibrating extrude, core mould vibrating is shaping etc.But round tube also existing some drawbacks: 1, round tubing needs reinforcement when laying and install, occurring because of round characteristic and adding continuity cost; 2, space availability ratio is lower, and under identical spatial condition, round tube area is little, and the cross section flow passed through is relatively little.

In the prior art, square tube is generally the concrete prefabricated square pipe be made up by mouth of body, cone-shaped plug and taper, and in the middle of body, establish one section of slip joint, body section is square.Although square tube has good stability and the large characteristic of cross section flow, it is weak that square tube also also exists external pressure weight bearing power simultaneously, improves the drawback that external pressure load force cost is high; Owing to arranging slip joint in the middle of body, adopt again conventional concrete prefabricated, this weakens greatly by making the external pressure weight bearing power of body and the intensity of body own simultaneously.

[model utility content]

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of concrete duct for building, and it is intended to solve the not high and round technical problem little by cross section flow of the external pressure weight bearing power of concrete pipe square of the prior art.

For achieving the above object, the utility model proposes a kind of concrete duct for building, comprise body and the cavity being positioned at tubular body, tenon and tongue-and-groove is respectively equipped with at the two ends of body, the caliber cross section of described body is square, the caliber cross section of described cavity is circular, reinforcing bar pipe support is provided with in described body, described reinforcing bar pipe support is cube, the fiber concrete making body is perfused with in described reinforcing bar pipe support, described reinforcing bar pipe support comprises 7 straight reinforcing bars of vertically arrangement and to be wrapped on straight reinforcing bar and bar bending on screw, described straight reinforcing bar is located at four angles of body and the center of four edges respectively.

As preferably, fiber in described fiber concrete is selected from polyacrylonitril fiber, polypropylene fiber, polyamide fiber, its fiber addition is 0.5 ~ 2kg/m3 mixture, length of staple is 6 ~ 28mm, fiber number 1.5 ~ 1.9, diameter 10 ~ 15 μm, specific elongation 14 ~ 20%, density 1.1 ~ 1.3g/cm3, intensity > 910Mpa, Young's modulus 17 ~ 17.5Gpa.

As preferably, described straight reinforcing bar and bar bending all adopt Twisted Steel, and the diameter of described straight reinforcing bar is 0.5 ~ 1mm, and length is 10 ~ 20mm.

As preferably, described body by tubing string mould and centrifugal casting machine manufacture, and adopts steam curing.

The beneficial effects of the utility model: compared with prior art, the one that the utility model provides concrete duct for building, rational in infrastructure, adopt circular cavity, square tube and round tube are combined, not only make that concrete reinforced pipe is easy for installation, cost of transportation is low, and stability is high, external pressure weight bearing power improves, also adopt the Framework Of Steel Reinforcement of square and the main body of the straight reinforcing bar be evenly distributed as body simultaneously, thus improve the weight bearing power of concrete reinforced pipe further, improve using effect and the market competitiveness of square tube.

Feature of the present utility model and advantage will be described in detail by reference to the accompanying drawings by embodiment.

[accompanying drawing explanation]

Fig. 1 is the structural representation of the utility model embodiment.

[embodiment]

For making the purpose of this utility model, technological scheme and advantage clearly understand, below by accompanying drawing and embodiment, the utility model is further elaborated.But should be appreciated that, specific embodiment described herein, only in order to explain the utility model, is not limited to scope of the present utility model.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present utility model.

Consult Fig. 1, the utility model embodiment provides a kind of concrete duct for building, comprise body 1 and the cavity 2 being positioned at body 1 inside, be respectively equipped with tenon 3 and tongue-and-groove 4 at the two ends of body 1, namely adopt tongue-and-groove structure, the caliber cross section of body 1 is square, the caliber cross section of cavity 2 is circular, be provided with reinforcing bar pipe support in body 1, reinforcing bar pipe support is cube, is perfused with the fiber concrete making body 1 in reinforcing bar pipe support.

In the utility model embodiment, for the technical problem that square tube external pressure weight bearing power is not high, internal passage 2 is set to circular pipe, the thickness at the corner edge place easily impacted in body 1 is increased greatly, thus improve the external pressure weight bearing power of body 1.And, also adopt square Framework Of Steel Reinforcement as the main body of composition body 1, both improve the stability of body 1, make again body 1 shape after pouring into a mould more upright, improve the quality of square tube.

Wherein, reinforcing bar pipe support comprises 7 straight reinforcing bars 5 of vertically arrangement and to be wrapped on straight reinforcing bar 5 and bar bending on screw, and straight reinforcing bar 5 is located at four angles of body 1 and the center of four edges respectively.Straight reinforcing bar 5 in this kind of structure is evenly distributed on reinforcing bar pipe support, and compared with existing circular reinforcing bar pipe support, square reinforcing bar pipe support can ensure the intensity of Framework Of Steel Reinforcement when straight reinforcing bar 5 negligible amounts, thus reduces the fabricating cost of square tube.

In order to increase the intensity of square tube, fiber in the fiber concrete of cast is selected from polyacrylonitril fiber, polypropylene fiber, polyamide fiber, its fiber addition is 0.5 ~ 2kg/m3 mixture, length of staple is 6 ~ 28mm, fiber number 1.5 ~ 1.9, diameter 10 ~ 15 μm, specific elongation 14 ~ 20%, density 1.1 ~ 1.3g/cm3, intensity > 910Mpa, Young's modulus 17 ~ 17.5Gpa.From structural level, high strength fibre and rigid concrete collectively form fiber concrete, both made under the condition not adding reinforcement cage, add the concrete of fiber, same energy improves concrete anti-plasticity, cracking-proof, anti-deforming, stretching resistance, alleviates again pipe fitting weight, saves steel and reduces fabricating cost, that is, the square tube in the utility model embodiment is particularly useful for the square tubing of heavy caliber and super sized type bore.

Particularly, straight reinforcing bar 5 and bar bending all adopt Twisted Steel, and the diameter of straight reinforcing bar 5 is 0.5 ~ 1mm, and length is 10 ~ 20mm.

Further, body 1 by tubing string mould and centrifugal casting machine manufacture, and adopts steam curing.The manufacture method of the utility model embodiment is as follows: be placed on by Framework Of Steel Reinforcement in pipe pile die, cement slurry and combined aggregate are stirred and becomes concrete, concrete is filled in pipe pile die chamber by the sprue gate of pipe pile die, then, start centrifugal casting machine, make it to rotate, by the effect of centrifugal casting machine cantilever centrifugal force, pipe pile die makes pipe pile die progressively be transformed into level by plumbness by turning to connecting strand, under the influence of centrifugal force, cement concrete sold stowing is in die cavity, after reaching set time, take off pipe pile die, be encased in steaming kiln and carry out steam curing, under the pressure condition of 120 DEG C of temperature and 10kg/cm2, maintain 24 hours, after completing health, open pipe pile die, take out pile tube, enter constant heat storage, holding temperature, at 30-50 degree, is placed 28 days, is completed finished product manufacture.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within protection domain of the present utility model.

Claims (2)

1. a concrete duct for building, comprise body (1) and be positioned at the inner cavity (2) of body (1), the caliber cross section of described body (1) is square, the caliber cross section of described cavity (2) is circular, it is characterized in that: be respectively equipped with the mounting head (3) and fitting seat (4) that cooperatively interact at the two ends of described body (1), described mounting head (3) and the shape of fitting seat (4) match with body (1), the outer ring of described mounting head (3) is provided with protruding tenon (31), inner ring is provided with installs through hole (32), the aperture of described installation through hole (32) is greater than the caliber of cavity (2), the aperture of described installation through hole (32) and the difference of cavity (2) caliber are not less than the thickness of mounting head (3), the outer ring of described fitting seat (4) is provided with the tongue-and-groove matched with tenon (31), inner ring is provided with installs flange collar (41), the external diameter of described flange collar is not less than the aperture of installing through hole (32), internal diameter is equal with the caliber of cavity (2), described installation flange collar (41) matches with installation through hole (32), reinforcing bar pipe support is provided with in described body (1), described reinforcing bar pipe support is cube, the fiber concrete making body (1) is perfused with in described reinforcing bar pipe support, 7 straight reinforcing bars (5) that described reinforcing bar pipe support comprises vertically arrangement and the bar bending be wrapped on the upper also screw of straight reinforcing bar (5), described straight reinforcing bar (5) is located at four angles of body (1) and the center of four edges respectively, described mounting head (3) and bolt cushion cap fitting seat (4) is also provided with for being fixedly connected with and tightening nut.

2. a kind of concrete duct for building as claimed in claim 1, is characterized in that: described straight reinforcing bar (5) and bar bending all adopt Twisted Steel, and the diameter of described straight reinforcing bar (5) is 0.5 ~ 1mm, and length is 10 ~ 20mm.