JPH0663980U - Double pipe for wastewater drainage - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a double pipe for draining waste liquid having a simple structure, which can prevent the waste liquid discharged from a production facility from leaking out of the waste liquid drain pipe. [Structure] A double plate 2 is constructed by inserting a polygonal plate-shaped spacer 8 penetrating the inner pipe 7 into a center hole 8a to form a double pipe 2, and a side of the spacer 8 and an arc-shaped inner surface of the outer pipe 6 are formed. A double pipe for draining waste liquid, in which a bow-shaped gap formed between the two is used as a recovery passageway 9 for the waste liquid leaked from the inner pipe 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waste liquid drainage double pipe for safely sending waste liquid discharged from a production facility to a waste liquid storage tank without leaking to the outside.

[0002]

[Prior art]

 The waste liquid containing harmful substances such as acids, alkalis and heavy metals discharged from production facilities cannot be discharged directly to the sewers etc. according to the regulations of the Sewerage Act, and such waste liquid is temporarily stored in the waste liquid storage tank. It is stipulated by law that the harmful substances should be reduced to below the standard value before being released to sewers. By the way, since the waste liquid drain pipes sent from the above-mentioned production facilities to the waste liquid storage tank are generally single pipes, if waste liquid leaks from the drain pipes, it will permeate underground and pollute the environment, causing serious pollution. There was a problem that it might invite.

[0003]

[Problems to be solved by the present invention]

 The present invention has been made for the purpose of preventing environmental pollution due to the waste liquid discharged from the above conventional production facilities, and the waste liquid leaks out of the waste liquid drain pipe with a simple structure. It is an object of the present invention to provide a double pipe for drainage of waste liquid, which can prevent the occurrence of this.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention forms a double pipe by inserting a polygonal plate-shaped spacer, which penetrates the inner pipe into the center hole, into the outer pipe, and forms the double pipe by the side of the spacer and the inner surface of the outer pipe. It features a double-drain drainage pipe with an arc-shaped gap formed between them as a recovery channel for the waste liquid leaked from the inner pipe.

[0005]

[Action]

 As described above, in the present invention, since the waste liquid drainage pipe has the double structure of the inside and outside, even if a leak occurs in the inner pipe, the leaked liquid only flows into the outer pipe and does not leak outside the pipe, but into the outer pipe. The leaked liquid is guided to the waste liquid storage tank through the arc-shaped waste liquid recovery flow path formed between the side of the polygonal plate-shaped spacer and the inner surface of the outer pipe, and the harmful waste liquid enters the underground and rivers. Environmental pollution is prevented in advance.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. FIG. 1 is an overall conceptual view of a production facility for treating waste liquid, FIG. 2 is a partially cutaway side view of a double pipe for waste liquid drainage according to the present invention, and FIG. 3 is a sectional view taken along the line AA of FIG. FIG. 4 is a perspective exploded view of the joint portion of the double pipe. In the figure, the polygonal plate-shaped spacer, which is one of the requirements of the present invention, is selected as a square spacer as a preferred embodiment. In FIG. 1, 1 is a production plant that produces waste liquid, 2 is a double pipe for draining waste liquid according to the present invention, 3 is a water storage tank installed in various places in the production facility for storing water for other purposes than drinking, and 4 is The waste liquid storage tanks 5 are liquid barriers that prevent the waste liquid from flowing out over a wide range when the waste liquid overflows from the storage tank 4 due to a failure of the storage tank 4.

As shown in FIGS. 2 and 3, the double pipe 2 for draining the waste liquid has a square plate-like shape with a diagonal length equal to the inner diameter of the outer pipe 6 inside the large outer pipe 6 made of vinyl chloride. A small-diameter inner tube 7 that penetrates the center hole 8a of the spacer 8 is held concentrically with the outer tube 6 by the spacer 8, and at the location of the spacer 8 between the side 8b of the spacer 8 and the inner surface of the outer tube 6. An arc-shaped waste liquid recovery flow passage 9 is formed, and by installing the double pipe 2 so that one of the arc-shaped waste liquid recovery flow passages 9 is horizontal under the outer pipe 6, the waste liquid leaked from the inner pipe 7 Is guided to the waste liquid storage tank 4 without the flow down being hindered by the spacer 8 holding the inner pipe 7.

As shown in FIG. 4, the connecting portion of the outer pipe 6 is provided with half-divided portions 6a and 6a at the connecting end portion of the outer pipe 6 and stabs them to each other. A half-split seam of a joint material 10 obtained by splitting a pipe is connected to the seam of the half-split part 6a of the outer pipe 6 by bonding with an adhesive in the same direction. The piping work of the heavy pipe 2 is efficiently performed. The shape of the spacer 8 is the square shape shown in the embodiment because it has good workability, and the most practical shape is a triangular shape or a hexagonal shape. FIG. 5 shows an example of triangular and hexagonal spacers. FIG. 6 shows a liquid leakage detection unit provided at the end of the double pipe 2. This liquid leakage detection unit 11 connects the transparent acrylic pipe 12 to the end of the outer pipe 6 and connects the outer pipe to the outer pipe. In addition to making it possible to visually check the leaked liquid at No. 6, a leak sensor 13 connected to an alarm is installed so that an alarm can be automatically issued when a leak occurs.

[0009]

[Effect of device]

 As described above, according to the present invention, a polygonal plate-shaped spacer penetrating the inner tube through the center hole is inserted into the outer tube to form a double tube, and the double tube is formed between the side of the spacer and the inner surface of the outer tube. Since the arc-shaped gap is used as a recovery channel for the waste liquid that leaks from the inner pipe, even if a leak occurs in the inner pipe, the leaked liquid only flows into the outer pipe and does not leak to the outside of the pipe, but to the outer pipe. The leaked liquid is guided to the waste liquid storage tank through the arc-shaped waste liquid recovery channel formed between the side of the polygonal plate-shaped spacer and the inner surface of the outer pipe, and the harmful waste liquid enters the underground and rivers. In addition to the prevention of environmental pollution, the double pipe has a simple structure, so the facility cost is low, and the outer pipe can also be graded by checking only the drainage gradient of the inner pipe, which also improves workability. Are better. Furthermore, even if the waste liquid drainage pipe is passed over the water storage tank for storing water for another purpose in the production facility shown in Fig. 1, the waste liquid should be stored in the lower part of the waste liquid drainage pipe like the conventional single wastewater drainage pipe. It does not require extra cost to install a gutter for the case of leakage, and is very useful because it is easy to manufacture and construct.

[0010]

[Brief description of drawings]

FIG. 1 is an overall conceptual diagram of a production facility that performs waste liquid treatment.

FIG. 2 is a partially cutaway side view of a double pipe for draining waste liquid according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an exploded perspective view of a joint portion of the present double pipe.

FIG. 5 is a side view of a liquid leakage detector provided at the end of the double pipe.

FIG. 6 is a view showing another example of the shape of a polygonal plate-shaped spacer.

[0011]

[Explanation of symbols]

 1 Production Factory 2 Double Pipe 3 Water Reservoir 4 Waste Liquid Storage Tank 5 Levee Dike 6 Outer Pipe 7 Inner Pipe 8 Spacer 8a Spacer Center Hole 8b Spacer Side 9 Waste Liquid Recovery Channel 11 Leakage Detection Section

Claims (1)

[Scope of utility model registration request] 1. A double plate is formed by inserting a polygonal plate-shaped spacer, which penetrates an inner tube into a center hole, into an outer tube, and is formed between a side of the spacer and an arcuate inner surface of the outer tube. A double pipe for drainage of waste liquid, characterized in that an arcuate gap is used as a recovery passageway for the waste liquid leaked from the inner pipe.