CN208024964U - The embed-type Prestressed concrete cylinder pipe of full anti-corrosion - Google Patents

Abstract

The utility model relates to a steel cylinder concrete pipe, especially a fully anti-corrosion embedded prestressed steel cylinder concrete pipe, which comprises a cylinder body and socket steel rings and socket steel rings respectively located at both ends of the cylinder body. A PVC layer, an inner wall concrete pipe, a thin steel cylinder, an outer wall concrete pipe and a mortar protection layer are arranged coaxially on the outside in sequence; the mortar protection layer is provided with prestressed steel wires. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe provided by the utility model has a simple overall structure, scientific and reasonable design, good durability, corrosion resistance, high strength, and simple manufacturing process. The PVC layer of the inner lining and the outermost The solvent-free epoxy coal tar pitch coating layer effectively prolongs the service life of prestressed steel cylinder concrete pipes, prevents harmful substances in sewage from corroding concrete and thin steel cylinders, improves impermeability, effectively prevents sewage from seeping out, and protects the environment.

Description

Fully anti-corrosion embedded prestressed steel cylinder concrete pipe

technical field

The utility model relates to a steel cylinder concrete pipe, in particular to a fully anti-corrosion embedded prestressed steel cylinder concrete pipe.

Background technique

With the improvement of living standards in our country, sewage sewers are necessary public facilities in modern cities, and are also new indicators of urban culture and quality of life. Now the government is actively engaged in the construction of sewage treatment projects, so that household sewage and industrial wastewater can be treated to meet discharge standards. , and then improve the environment, purify rivers and oceans.

Now governments around the world are building large-scale sewage pipe networks. There are many types of sewage pipes, but the most economical and practical reinforced concrete drainage pipes are used. However, due to the structure and processing technology of reinforced concrete drainage pipes, the pipe body and joints are prone to leakage, which will cause secondary pollution to underground soil and water bodies.

Compared with reinforced concrete pipes, prestressed steel cylinder concrete pipes have been affirmed for their better interface sealing performance and pipe body impermeability. More and more owners and design units are considering using PCCP to replace traditional reinforced concrete pipes in municipal sewage projects. PCCP has good anti-corrosion performance relying on its own concrete structure, but considering the change of conveying medium, especially the sewage in sewage Hydrogen sulfide and sulfuric acid will penetrate into the concrete along with the water, corrode the concrete first, and then corrode the steel plate or steel bar, resulting in damage or even destruction of the pipeline.

Utility model content

In order to solve the above problems, the utility model provides a fully anti-corrosion embedded pre-corrosion pump with simple structure, resistance to the infiltration of corrosive media in sewage, acid resistance, alkali resistance, good anti-corrosion effect, preventing secondary pollution of soil and water bodies, and long service life. Stressed steel cylinder concrete pipe, the specific technical scheme is:

The fully anti-corrosion embedded prestressed steel cylinder concrete pipe includes a cylinder body and socket steel rings and socket steel rings respectively located at both ends of the cylinder body. , a thin steel cylinder, an outer wall concrete pipe and a mortar protection layer; the outer surface of the outer wall concrete pipe is also provided with prestressed steel wires.

By adopting the above technical scheme, PVC is polyvinyl chloride, and the polyvinyl chloride molecule contains chlorine atoms. Due to the dipole influence of the C-CL bond, it is a very polar material. PVC has good acid and alkali resistance. , wear resistance, flame resistance and insulation properties. The PVC layer can adopt the existing PVC layer or be processed from PVC sheets.

Preferably, the outer wall of the PVC layer is provided with fixing keys, and the fixing keys are embedded in the concrete pipe of the inner wall.

Preferably, the fixed key is a T-shaped key.

By adopting the above-mentioned technical scheme, the PVC layer is processed by a PVC sheet provided with T-shaped keys on the surface, the thickness of the inner PVC sheet is 1.5-2.0mm, and one side of the PVC sheet is provided with T-shaped keys. Before pouring, cut and melt on-site according to the nominal inner diameter of the pipe, insert the cylindrical PVC sheet into the inner mold of the pipe core and tighten the inner mold so that the PVC sheet is close to the inner mold, then place the steel cylinder and outer mold, and carry out Concrete pouring, the T-shaped key of the PVC sheet can be firmly wrapped by the concrete after demoulding.

Preferably, the socket steel ring and the socket steel ring are respectively welded to both ends of the thin steel cylinder.

Preferably, the socket steel ring is provided with a sealing groove.

Preferably, there are two sealing grooves.

Preferably, the socket steel ring is also provided with a pressure test hole, and the pressure test hole is located between the two sealing grooves.

Preferably, it also includes a solvent-free epoxy coal tar pitch coating layer, and the solvent-free epoxy coal tar pitch coating layer is located on the outer wall of the mortar protection layer.

By adopting the above technical scheme, the solvent-free epoxy coal tar pitch coating layer can effectively improve the anti-corrosion ability of the prestressed steel cylinder concrete pipe, and greatly increase the service life.

Preferably, the prestressed steel wire is wound on the outer surface of the outer wall concrete pipe, the two ends of the prestressed steel wire are fixed on the anchor block, the anchor block is fixed on the embedded part, the embedded part is embedded in the outer wall concrete pipe, and is located on the outer wall The ends of the concrete pipe.

By adopting the above technical scheme, the prestressed steel wire is tightly wound on the outer surface of the outer wall concrete pipe, and the prestressed steel wire bears internal water pressure and external load.

Compared with the prior art, the utility model has the following beneficial effects:

The fully anti-corrosion embedded prestressed steel cylinder concrete pipe provided by the utility model has a simple overall structure, scientific and reasonable design, good durability, corrosion resistance, high strength, and simple manufacturing process. The PVC layer of the inner lining and the outermost The solvent-free epoxy coal tar pitch coating layer effectively prolongs the service life of prestressed steel cylinder concrete pipes, prevents harmful substances in sewage from corroding concrete and thin steel cylinders, improves impermeability, effectively prevents sewage from seeping out, and protects the environment.

Description of drawings

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

Fig. 2 is a sectional view along line A-A in Fig. 1 .

Detailed ways

Now in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1 and Figure 2, the fully anti-corrosion embedded prestressed steel cylinder concrete pipe includes a cylinder body and a socket steel ring 7 and a socket steel ring 8 respectively located at both ends of the cylinder body. The PVC layer 1, the inner wall concrete pipe 2, the thin steel cylinder 3, the outer wall concrete pipe 4 and the mortar protection layer 6 are arranged on the line, the two ends of the PVC layer 1 are flush with the two ends of the inner wall concrete pipe 2; the prestressed steel wire 5 is wound on On the outer surface of the outer wall concrete pipe 4, the two ends of the prestressed steel wire 5 are fixed on the anchor block, the anchor block is fixed on the embedded part, the embedded part is embedded in the outer wall concrete pipe 4, and is located at the two ends of the outer wall concrete pipe 4 .

The outer wall of the PVC layer 1 is provided with a fixed key 11, and the fixed key 11 is embedded in the concrete pipe 2 on the inner wall. The fixed key 11 is a T-shaped key.

The socket steel ring 7 and the socket steel ring 8 are welded together with the two ends of the thin steel cylinder 3 respectively.

The socket steel ring 8 is provided with a sealing groove 81 . There are two sealing grooves 81 .

The socket steel ring 8 is also provided with a pressure test hole 82 , and the pressure test hole 82 is located between the two sealing grooves 81 .

It also includes a solvent-free epoxy coal tar pitch paint layer, and the solvent-free epoxy coal tar pitch paint layer is located on the outer wall of the mortar protection layer.

PVC is polyvinyl chloride. Polyvinyl chloride molecules contain chlorine atoms. Due to the dipole influence of the C-CL bond, it is a very polar material. PVC has good acid and alkali resistance, wear resistance, flame resistance and insulation properties. The PVC layer 1 is processed by PVC sheets with T-shaped keys on the surface, the thickness of the PVC sheet lining is 1.5-2.0mm, and one side of the PVC sheet is provided with T-shaped keys. Before pouring, cut and melt on-site according to the nominal inner diameter of the pipe, insert the cylindrical PVC sheet into the inner mold of the pipe core and tighten the inner mold so that the PVC sheet is close to the inner mold, then place the steel cylinder and outer mold, and carry out Concrete pouring, the T-shaped key of the PVC sheet can be firmly wrapped by the concrete after demoulding.

The solvent-free epoxy coal tar pitch coating layer is directly coated on the cement mortar protective layer, which adds an important barrier to the improvement of the anti-corrosion performance of the embedded prestressed steel cylinder concrete pipe, and is easy to process.

The fully anti-corrosion embedded prestressed steel cylinder concrete pipe realizes simultaneous anti-corrosion of the inner layer and outer layer, which greatly prolongs the service life. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe is poured vertically, with a diameter of 1200-4000mm.

Claims (9)

1. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe is characterized in that it includes a cylinder body and socket steel rings (7) and socket steel rings (8) respectively located at both ends of the cylinder body, and the cylinder body includes The PVC layer (1), the inner wall concrete pipe (2), the thin steel cylinder (3), the outer wall concrete pipe (4) and the mortar protection layer (6) arranged on the coaxial line in turn, the two ends of the PVC layer (1) and the inner wall Both ends of the concrete pipe (2) are flush; the outer surface of the outer wall concrete pipe (4) is also provided with prestressed steel wires (5). 2. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 1, characterized in that, the outer wall of the PVC layer (1) is provided with a fixed key (11), and the fixed key (11) is embedded in on the inner wall concrete pipe (2). 3. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 2, characterized in that the fixed key (11) is a T-shaped key. 4. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 1, characterized in that, the socket steel ring (7) and the socket steel ring (8) are respectively connected with the two sides of the thin steel cylinder (3). The ends are welded together. 5. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 1, characterized in that, the socket steel ring (8) is provided with a sealing groove (81). 6. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 5, characterized in that there are two sealing grooves (81). 7. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 6, characterized in that, the socket steel ring (8) is also provided with a pressure test hole (82), and the pressure test hole (82 ) between the two sealing grooves (81). 8. The full anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 1, is characterized in that, also comprises solvent-free epoxy coal tar pitch paint layer, and described solvent-free epoxy coal tar pitch paint layer is positioned at mortar protective layer ( 6) The outer wall. 9. The fully anti-corrosion embedded prestressed steel cylinder concrete pipe according to claim 1, wherein the prestressed steel wire (5) is wound on the outer surface of the outer wall concrete pipe (4), and the prestressed steel wire (5) The two ends are fixed on the anchor block, the anchor block is fixed on the embedded part, and the embedded part is embedded in the outer wall concrete pipe (4) and is located at the two ends of the outer wall concrete pipe (4).