JP3011894U - Hose for chemical injection into concrete - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Improve the hose for chemical injection into concrete, injecting two different components at the same time and, if necessary, injecting another component later. You can At least two, preferably one, member having an injection material introduction part 1 and a compressible perforated material 4 fixed to the introduction part, said introduction part 1 extending two adjacently As including a conduit 2 cast in the form of a strip,
A microscopic hole 3 is formed in the outer wall of the conduit, and penetrates from the inside to the outside when a predetermined internal positive pressure is generated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hose for performing chemical injection into concrete, and relates to a hose having an injection material introducing portion and a compressible porous material fixed to the introducing portion.

As is well known, concrete structures that are subject to water pressure are generally subject to high demands, especially for seams of concrete, when performing concrete work.

Ideally, the seam formed between two concrete operations should be free of cracks, gaps, aggregates of stone, and the like. Especially when hitting a concrete wall on a concrete floor that has been previously poured concrete, there may be a leakage problem.

However, in practice, it is almost impossible to form an ideal seam due to the lack of uniformity of concrete and the inevitable shrinkage of concrete when it hardens.

[0005]

[Prior art]

 The subsequent filling of the created gaps and cracks has been studied and many technically proposed methods and devices have been proposed.

[0006] Many traditional methods for filling cracks in concrete have been to provide point-like injection at the joints of the concrete. However, this method is neither safe nor cheap.

Therefore, the method of filling concrete seams has been studied for some time and now injection systems are generally used. This method basically uses a hose, which is perforated in various ways and which is positioned in the longitudinal direction of the concrete seam, usually filled with a two-component polyurethane material. The material is injected into the hose and dispensed at the seam through holes provided in the hose, and the material is cured to fill. As alluded to earlier, this system is installed before any new concrete pouring, thus eliminating the time-consuming and costly drilling of concrete structures.

As a known technique in the field, reference may be made in particular to EP 0.125.696-A3, which comprises a regularly perforated central introduction hose and a hose around the hose. A filter layer of the shape is arranged, which is further surrounded by a hose-shaped, reticulated protective layer.

NO ----- (Japanese Patent Application P9111086) is an injection hose for performing chemical injection into concrete, which has a centrally introduced hose with regular holes. An injection hose is described that consists of a retractable sheath having a through hole with a coating disposed thereon, the coating disposed around the hose.

The purpose of providing the coating is to prevent holes in the distribution hose for the hardened material from being blocked by the concrete mass during concrete pouring. It has been found that textile fabrics are not suitable for this purpose. The reason is that the woven fabric itself is a smooth member, which is clogged when concrete is poured and prevents the jet for filling cracks and gaps from being emitted from the perforated layer.

Subsequent developments and research in this area have led to the development of systems sold under the trade name “FUKO” today. This system has a hose core made of a stiff, high-resistance material with a groove arranged in the longitudinal direction of the hose and a through hole arranged at the bottom of the groove. The groove is covered by a gently laid layer so that the entire contour of the hose is approximately circular.

The purpose of this layer is to prevent the concrete from blocking the holes in the hose when the concrete is poured. At the same time, this layer causes the propellant itself to be extruded at low pressure from the inlet hose into the surrounding cracks and crevices.

The “FUKO” system finally has a fabric surrounding it, that is to say an open plastic sock, for fixing the layers extending along its length.

Although this system is technically reliable and highly safe, it is more complex to manufacture than that described in said NO ---- and is therefore very high. Value.

This technically sophisticated product is inherently expensive and its use only when the concrete structure in question is under constant water pressure and therefore must be secured. Is approved.

[0016] In many structures, the danger of hydraulic pressure in the concrete structure portion is periodic, and is considered to occur only rarely. For example, some periodicity can be considered in the high tide area, but almost no periodicity in the flooded area. In such an area, a system that is technically simple and highly safe, that is, a system that is both easy to purchase and use, such as the above-mentioned NO ----, which has a simple structure and is easy to manufacture, is adopted. Is appropriate.

[0017]

[Problems to be solved by the device]

 The object of the present invention is to improve the conventional technology so that two different components can be injected simultaneously and, if deemed necessary, another component later.

The present invention is not suitable with only one introduction path, especially at the starting point, and the wider the area in which the propellant material is distributed, the more particularly with one member. It is based on the recognition that when it is done, the seal must be ensured.

[0019]

[Means for Solving the Problems]

 Accordingly, the present invention is a hose of the type described above, having at least two adjacently extending, preferably one member, conduits which are cast in the form of strips and which have a small hole in the outer wall of the conduit. Are formed, and when a predetermined internal positive pressure is generated, these holes penetrate from the inside to the outside.

The porous, compressible material described above is preferably spongy plastic, but can be any other material, such as small gauge steel wool, as long as it meets the needs.

[0021]

【Example】

 The present invention will be described with reference to FIG. In the case shown, the lead-in part 1 has three adjacently extending conduits 2, each containing a small hole 3, which in the inflated state of the hose is a positive pressure inside the conduit 2. Open for release by, but close when negative pressure is created in the line.

A mounted cover 4, preferably a cover made of spongy plastic with through-holes, ensures that the injection material is distributed as required and keeps the micro-holes free.

The product according to the invention is simpler to manufacture and is therefore significantly cheaper to manufacture than the known elaborate products. At the same time, required work safety can be maintained.

Therefore, the object of the present invention may completely prevent the intrusion of water in any case where safety against water is required, because water pressure may be applied to the concrete structure at some time. Needless to say, it can meet the market demand for cheap products with reasonable safety that can be used for the main purpose of blocking to a safe degree compared to conventional ones.

[Brief description of drawings]

FIG. 1 is a perspective view of a hose according to the present invention.

[Explanation of symbols]

 1 Introduction part 2 Pipeline 3 Small hole 4 Cover

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F16L 11/12

Claims (1)

[Scope of utility model registration request] 1. A hose for performing chemical injection into concrete, the hose having an injection material introduction portion (1) and a compressible porous material (4) fixed to the introduction portion. The portion (1) comprises at least two adjacently extending, preferably one piece and has a channel (2) cast in the form of a strip, the outer wall of which has a microscopic hole (3). A hose formed so as to penetrate from the inside toward the outside when receiving a predetermined internal positive pressure.