CN2161725Y - Steel fibre concrete shaft screw fastener joint - Google Patents

Abstract

The utility model relates to a steel fibre concrete shaft screw fastener joint, which is a novel connecting means of concrete shafts in drilling engineering. The utility model is characterized in that steel hoops originally arranged on both ends of a concrete shaft for being welded are replaced by steel fibre concrete screw heads and steel fibre concrete screw sleeves. The screw fastener of the utility model is a trapezoidal thread with taper. When the utility model is installed, so long as the screw heads are screwed into the corresponding screw sleeves, automatic centering can be realized, and the operation is convenient and accurate. Because a proper amount of steel fibre is added in concrete, the shearing resistance of the screw fastener is greatly enhanced.

Description

Steel fibre concrete shaft screw fastener joint

The utility model relates to concrete prefabricated element in the fixed buildings, forms for primary raw material mechanism with cement and steel fibre for a kind of, and is easy for installation, is used for the steel fibrous concrete eye pipe threaded joint and the steel fibrous concrete wall pipe threaded joint of drilling engineering.

In drilling engineering, adopted patented product " steel fibrous concrete eye pipe " at present widely, (patent No.: 92212406 *) and supporting with it " steel fibrous concrete wall pipe ".This product has cheap, is difficult for advantages, very popular with users such as corrosion.Because this product has adopted the mounting method of pipe under the suspension method.Therefore respectively be provided with a stirrup used when installing at the two ends of concrete well, with electric welding stirrup welded when construction, following shaft bottom again saves land well casing one joint one.Electric welding welding stirrup is cumbersome, also is difficult to guarantee the axiality of whole well casing simultaneously.The cost of stirrup is very high in addition, and the cost of a long stirrup of 80mm is equivalent to the value of 1000mm long concrete well casing.Also have more priorly, the stirrup major part is exposed to outside the concrete, corrosion especially easily, and the corrosion in advance of stirrup will directly influence the application life of concrete well.Therefore many users advise that we manage to remove the stirrup at concrete well two, but keep adopting the job practices of pipe under the suspension method again.

It is a kind of cheap that the purpose of the utility model is to provide, and easy construction is difficult for corrosion, and screw joint for reinforced concrete well pipe accurately is installed, thereby must be with the stirrup joint of electric welding welding when replace installing.Save the engineering time to reach, improve installation quality, reduce construction costs, the purpose that increases the service life.

Description of drawings:

(Fig. 1) be the utility model structure sectional view.

(Fig. 2) be the utility model embodiment (1) structural representation.

(Fig. 3) be the utility model embodiment (2) structural representation.

The technical solution of the utility model is: be primary raw material with concrete and steel fibre, designed serial Special-purpose combined die, adopted centrifugally, the mechanical-moulded method such as roll extrusion is once watered complex-shaped screw joint for reinforced concrete well pipe and to be smash moulding. The utility model partly is made up of steel fiber reinforced concrete silk head (1) and guiding principle fiber concrete silk braid (2) two. (as shown in Figure 1) during construction and installation, as long as the steel fiber reinforced concrete silk head (1) at well casing two ends is screwed into respectively in the corresponding steel fiber reinforced concrete silk braid (2), just tens of reinforced concrete wells 3 meters long can be connected to become an integral body. Because threaded joint is the trapezoidal thread of band cone, after screw thread was tightened, the male and female silk just can accurately be located, and had not a particle of the swing gap, thereby had guaranteed the axiality of whole well casing. Because concrete has very high packing, in concrete, also added an amount of steel fibre simultaneously, so this screw thread has very high shear resistance, and tensile strength. Proof by experiment, its tensile strength of screw joint for reinforced concrete well pipe have surpassed the standard tension load of the wall casing of pipe under the suspension method of defined in the industry standard (JC448-91).

Owing to adopted technique scheme, the utlity model has cheaply, easy for installation, be difficult for advantages such as corrosion.It saves man-hour 50% than electric welding connection method, simultaneously can also self-centering, guaranteed construction quality.Cost of the present utility model has reduced by 70% than the cost of stirrup joint, also is difficult for corrosion simultaneously, is longer than the stirrup joint application life.

Owing to possess above-mentioned advantage, the regeneration product of the joint of stirrup really of the present utility model.

The utility model embodiment is as follows:

Embodiment 1:

With reference to accompanying drawing 2 present embodiments is the reinforced concrete well (comprising wall casing and eye pipe) that two ends have steel fibrous concrete silk head (1).Well casing length is 3 meters, and its tube wall adopts casting and compacting of concrete to form, and has also mixed the steel fibre of some in concrete.Simultaneously in the garden of tube wall in week, along the axis direction of well casing uniform several prestressing force indented bars (A), indented bar (A) has advantages of higher tensile strength, can satisfy the tension requirement of well casing.Spiral stirrup (B) is also being twined in garden at indented bar (A) on week.The steel fibrous concrete silk head (1) at well casing two ends is the taper shape, and the microcephaly is towards the end.Its screw thread is shaped as trapezoidal thread.There is higher axiality at the center of silk head (1) and the center of well casing, to guarantee to install the requirement of the whole well casing concentricity in back.

Embodiment 2

With reference to accompanying drawing 3, present embodiment is the steel fibrous concrete silk braid.Silk braid is the garden tube shape, at the Wai Yuan two ends of silk braid, the small stair (E) of place's projection is arranged respectively.The endoporus two ends of silk braid respectively are provided with one and are the conessi mother (C) of trapezoidal thread shape and (D).Conessi mother (C) and major part (D) outwardly, its axis has very high concentricity, thereby has guaranteed the installation accuracy of well casing.Conessi mother (C) and screw thread (D) have higher shear resistance, can satisfy the tension requirement of whole well casing.In the tube wall garden week of steel fibrous concrete silk braid, along the axis direction of silk braid, uniform several prestressing force indented bars (A).Indented bar (A) has enough tensile strength, can satisfy the tension requirement of silk braid.Spiral stirrup (B) is also being twined in garden at indented bar (A) on week.Owing to designed serial particular manufacturing craft and adopted advanced production technology, the conessi mother (C) of present embodiment and (D) geometry of its work plane higher precision is arranged, guarantee the reliability of well casing construction and installation.

Claims (3)

1, a kind of screw joint for reinforced concrete well pipe is a kind of novel connected mode of concrete well, and feature of the present utility model is that it is made up of steel fibrous concrete silk head (1) and steel fibrous concrete silk braid (2), and its screw thread is the trapezoidal thread of band awl.

2, according to the screw joint for reinforced concrete well pipe of claim 1, it is characterized in that to be made into the reinforced concrete well that two has steel fibrous concrete silk head (1), in the garden of its tube wall in week, along the well casing axis direction uniform several prestressing force indented bars (A), in the garden of indented bar (A) on week, twining spiral stirrup (8), silk head (1) for the trapezoidal thread of band awl and microcephaly towards the end, the axis of silk head (1) and the axis of well casing have higher concentricity.

3, according to the screw joint for reinforced concrete well pipe of claim 1, its feature also is to be made into the steel fibrous concrete silk braid, silk braid is the garden tube shape, in the garden of its tube wall in week, along its axis direction, uniform several prestressing force indented bars (A), twining spiral stirrup (B) on week in the garden of indented bar (A), endoporus two ends at the steel fibrous concrete silk braid, respectively be provided with one and be the trapezoidal thread shape, have certain taper, its major part outwardly, and mutual coaxial conessi mother (C), (D).

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