JP2002188783A - Piping facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping facility allowing early detection of leakage of liquid chemicals at an initial state to treat waste liquid and capable of storing the leaked liquid without splashing it outside in the case of a serious breakdown accident. SOLUTION: This piping facility has the double pipe structure formed of the interior pipe 1 formed by connecting one end of each interior pipe 12, 13 and 14 to each pipe connection part of an interior branch joint 11 and the exterior pipe 2 arranged to cover the periphery of the interior pipe 1 and formed by connecting one end of each exterior pipe 22, 23 and 24 to each pipe connection part of an exterior branch joint 21 arranged in the periphery of the interior branch joint 11. The exterior branch joint 21 of the double pipe structure and the adjacent part thereof are arranged inside a box-like structure 3, and the other end of each exterior pipes 22 and 23 is led out of the box-like structure 3, passing through the box-like structure, and each exterior pipe 22 and 23 is engaged with the box-like structure 3 at passing through positions thereof in a water-cutting state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping system used for supplying or discharging liquid chemicals such as acids, alkalis, salts, and solvents and water.

[0002]

2. Description of the Related Art Conventionally, as a special piping facility for use in a chemical supply facility, for example, as described in Japanese Patent Publication No. 50640/1979, as shown in FIG. Only the inner pipe b of the pipeline having the double pipe structure is inserted, the outer pipe c is fixed at the pipe end, and the inner pipe b
Has been proposed in which a pipeline for supplying a liquid chemical is formed by being branched via a joint portion d inside a branching box a.

In this plumbing equipment, as a countermeasure against the leakage of the liquid chemical from the pipeline, the bottom of the branch box a is lower than the position of the outer pipe c, and a sensor e for detecting the leaked liquid chemical is provided. Is provided with a pipe f for guiding the leaked liquid medicine, a valve g, a liquid stopper h, and a check valve i. When the leaked liquid medicine is detected by the sensor e, the valve g is opened and the pipe f is opened. A structure that allows discharge via the air is adopted.

However, in such a conventional piping system, since the amount of leakage of the liquid chemical in the initial stage of leakage is small, it is absorbed in the space in the branching box a having a large space, and early detection cannot be performed. There is a problem. Further, even if the amount of leaked liquid is small, all of the leaked liquid accumulates in the branching box a, so that it is necessary to provide dedicated piping equipment for drain without fail, and there is a problem that the equipment becomes large. .

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and detects the leakage of liquid chemicals at an early stage at the early stage of leakage, and treats the leakage liquid through an external pipe to waste liquid treatment. If a large amount of liquid chemical leaks out of the exterior piping due to a serious damage accident that may also damage the branch part of the exterior pipeline, the leaked liquid should be scattered outside. Can be stored in a box-shaped structure without
An object of the present invention is to provide a piping system used for supplying or draining liquid chemicals such as acids, alkalis, salts, and solvents, and water.

[0006]

Means for Solving the Problems The invention according to claim 1 of the present application (the present invention 1) provides an interior pipe in which one end of an interior pipe is connected to each pipe connection part of an interior branch joint, and An outer pipe is laid so as to cover the outer circumference of the pipe, and has an outer pipe in which one end of an outer pipe is connected to each pipe connection portion of an outer branch joint disposed on the outer circumference of the inner branch joint. It has a piping structure, the outer branch joint of this double piping structure and its adjacent part are disposed in a box-shaped structure, and the other end side is the box so that each of the outer piping penetrates the box-shaped structure. A pipe facility which is led out of the tubular structure, and is engaged with the box-shaped structure in a water-blocking state at a location where the exterior piping passes therethrough.

The invention described in claim 2 of the present application (the present invention 2)
Is a piping facility of the present invention in which the exterior branch joint is a split type.

In the present invention, the material of the inner pipe and the inner branch joint must be a material capable of withstanding supply or drainage of liquid chemicals such as acids, alkalis, salts, and solvents, and water, such as polyethylene. Polyolefin and polyvinyl chloride.

In the present invention, an outer pipe, an outer branch joint,
As the material of the box-shaped structure, depending on its use, it can be used for a certain period of time.
It is only necessary to have chemical resistance (time until repair), and polyvinyl chloride, etc., which has a wide range of liquid chemicals such as solvents and has a certain degree of chemical resistance, is inexpensive, has many types, and is preferably used. Those having transparency are more preferable.

[0010]

The piping system according to the first aspect of the present invention comprises an inner pipe in which one end of an inner pipe is connected to each pipe connecting portion of the inner branch joint, and laid so as to cover an outer periphery of the inner pipe. The outer branch of the double pipe structure has a double pipe structure including an outer pipe in which one end of an outer pipe is connected to each pipe connection portion of the outer branch joint disposed around the outer circumference of the branch joint. The joint and its adjacent part are arranged in a box-shaped structure,
The other end side is led out of the box-shaped structure so that each of the exterior pipes penetrates the box-shaped structure. When a leak occurs outside the interior piping while the liquid chemical or the like is flowing down into the interior piping by being engaged, the gap between the interior pipeline and the exterior pipeline is small, so the amount of leakage at the initial stage of leakage is small. Even at the stage, it can be detected early by the sensor, the leaked liquid can be collected at one place through the exterior pipe 2 at an early stage, and the waste liquid can be treated. If a large amount of liquid chemicals etc. leaks out of the exterior piping due to a serious damage accident, the leaked liquid can be stored in the box-shaped structure without scattering to the outside,
When the line is stopped, the lid of the box-shaped structure is opened, and waste liquid treatment in the box-shaped structure can be performed.

In the piping system according to the second aspect of the present invention, since the outer branch joint is a split type, the upper half of the vertically split outer branch joint is opened, and the leakage liquid in the outer conduit is opened. Can be discharged, so that the load on the exterior piping can be reduced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view showing an example of the piping equipment of the present invention. As shown in FIG. 1, this piping facility includes an interior piping 1, an exterior piping 2, and a box-shaped structure 3.

The interior piping 1 includes an interior branch joint 11, interior main pipes 12 and 13, and an interior branch pipe 14. The interior branch joint 11 is a cheese-type branch joint, in which main pipe receiving ports 111 are provided at both ends, and a branch pipe receiving port 1 is provided at a central portion in an upward direction.
13 are provided.

The main pipes 12 and 13 and the internal branch pipe 14 are connected to the main pipe port 111 (only one is shown) and the branch pipe port 113 of the interior branch joint 11 via a packing (not shown) in a water-stop state. The interior piping 1 is provided.

The exterior pipe 2 comprises an exterior branch joint 21, exterior main pipes 22 and 23, and an exterior branch pipe 24. The exterior branch joint 21 is a cheese-type branch joint larger than the interior branch joint 11, and has main pipe receiving ports 211 and 212 at both ends, and a branch pipe receiving port 213 is provided upward at the center. . As shown in FIG. 2, the exterior branch joint 21 is of a split type that divides a substantially central portion of the main pipe receiving ports 211 and 212 into two in the horizontal direction in order to easily discharge the leakage liquid. .

An outer branch joint 21 disposed around the inner branch joint 11 so as to cover the outer circumference of the inner pipe 1.
The outer pipe 2 is laid by connecting the outer pipes 22, 23 and the outer branch pipe 24 to the main pipe receiving ports 211, 212 and the branch pipe receiving port 213 through the packing 15 in a water-stop state. A heavy pipe structure is formed. Exterior branch joint 21
The outer periphery of the main pipe receiving ports 211 and 212 is fastened by the locking band 7.

The box-shaped structure 3 includes a box-shaped main body 31 and a lid 3
2 The box-shaped main body 31 has side plates 312, 313, and 314 (side plates not shown in the drawing are not shown) standing upward from four sides of the rectangular bottom plate 311. It is made of a box-shaped member having an upper opening and provided with 316. The side plates 312 and 314 on the short side of the box-shaped structure 3 are provided with through holes through which the exterior main pipes 22 and 23 are inserted. Is engaged with the locking cylinder 317,
318 is extended. Male threads for fastening cap nuts are provided on the outer peripheral surface of the distal end portions of the locking cylinders 317 and 318.

The lid 32 is formed of a rectangular plate whose peripheral edge can be placed on the flange 316 of the box-shaped main body 31, and a through hole through which the outer branch pipe 24 is inserted is provided at a substantially central portion thereof. The outer branch pipe 2 is provided upward from the peripheral wall of the through hole.
4 is provided with a locking cylinder 319 to be engaged. A male screw for fastening a cap nut is provided on the outer peripheral surface of the distal end portion of the locking cylinder 319.

The box-shaped structure 3 may be configured such that not only the lid 32 but also a part of the side plate can be removed. Further, in the box-shaped structure 3, a waste liquid port for drain may be provided in the bottom plate 311.

In the box-shaped main body 31 of the box-shaped structure 3, an outer branch joint 21 having a double piping structure and its adjacent portion are disposed, and the outer main pipes 22 and 23 are connected to the locking cylinder 31 of the box-shaped main body 31.
The other end side is led out of the box-shaped structure 3 so as to penetrate through the inside of the box 7, 318. By tightening the cap nut 33 to the locking cylinders 317 and 318, each outer main pipe 2
2, 23 are locking cylinders 317, 31 via packing 15;
8 is engaged in a water stop state.

The lid 32 is placed on the box-shaped main body 31, and its outer peripheral edge is fastened to the flange 315 of the box-shaped main body 31 by a fastener (not shown). The other end is led out onto the box-shaped structure 3 so that the exterior branch pipe 24 passes through the inside of the locking tube 319 of the lid 31. By fastening the cap nut 33 to the locking cylinder 319, the exterior branch pipe 24 is engaged with the locking cylinder 319 via the packing 15 in a water-stop state.

As described above, in the piping equipment of this embodiment, the outer branch joint 21 having the double piping structure including the inner piping 1 and the outer piping 2 and the adjacent portion thereof are formed in the box-like structure 3.
This part is double protected. A sensor (not shown) for detecting a leaked liquid chemical or the like is mounted in the exterior main pipes 22 and 23. The mounting position of the sensor may be a portion corresponding to the inside of the box-shaped structure 3 or a portion corresponding to the outside.

If a leak occurs outside the interior piping 1 while a liquid chemical or the like flows down into the interior piping 1 of this piping facility, the gap between the interior piping 1 and the exterior piping 2 is small, Even at a stage where the amount of leakage is small, it can be detected early by the sensor, and the leakage liquid can be collected at one place through the exterior pipe 2 and waste liquid treatment can be performed at an early stage. Also, when a large amount of liquid chemicals or the like flows out of the exterior piping 2 due to a serious damage accident that also damages the branch portion of the exterior pipeline 2, the leaked liquid is not scattered to the outside and a box-shaped It can be stored in the structure 3. In this case, the line is stopped and the locking cylinder 319 of the cap nut 33 of the box-shaped structure 3 is stopped.
The lid 32 is opened by releasing the engagement state with the box-shaped structure 3.
Perform waste liquid treatment inside. At this time, it is preferable to open the upper half of the exterior branch joint 21 that is of the split type, and discharge the leakage liquid in the exterior pipeline 2. Thereby, the load on the exterior pipe 2 can be reduced.

FIGS. 3A and 3B are explanatory views showing an example of the piping equipment of the present invention. FIG. 3A is a partial sectional view in plan view showing a state where a cover is removed, and FIG. It is. As shown in FIG. 3, this piping facility includes an interior piping 4, an exterior piping 5, and a box-shaped structure 6.

The interior piping 4 comprises an interior branch joint 41, interior main pipes 42 and 43, and an interior branch pipe 44. The interior branch joint 41 is a cheese-type branch joint, and a main pipe receiving port 411 (only one is shown) is provided at both ends, and a branch pipe receiving port 413 is provided at a central portion toward the side.

The main main pipes 42, 43 and the internal branch pipe 44 are connected to the main pipe receiving port 411 and the branch pipe receiving port 413 of the internal branch joint 41 via a packing (not shown) in a water-stop state. Are arranged.

The exterior pipe 5 comprises an exterior branch joint 51, exterior main pipes 52 and 53, and an exterior branch pipe 54. The exterior branch joint 51 is a cheese-type branch joint larger than the interior branch joint 41, and has main pipe receiving ports 511 and 512 at both ends and a branch pipe receiving port 513 at the center portion toward the side. I have. As shown in FIG. 4, the exterior branch joint 51 divides a substantially central portion of the main pipe receiving ports 511, 512 and the branch pipe receiving port 513 into two parts in the horizontal direction in order to easily discharge the leakage liquid. It is a split type.

An outer branch joint 51 disposed around the outer periphery of the inner branch joint 41 so as to cover the outer periphery of the inner pipe 4.
The outer pipes 5 are laid by connecting the outer pipes 52, 53 and the outer branch pipe 54 to the main pipe receiving ports 511, 512 and the branch pipe receiving port 513 through the packing 45 in a watertight state. A heavy pipe structure is formed. Exterior branch joint 51
The outer periphery of the main pipe receiving ports 511 and 512 and the branch pipe receiving port 513 are fastened by the locking band 7.

The box-shaped structure 6 includes a box-shaped main body 61 and a lid 6.
2 The box-shaped main body 61 has side plates 612, 613, 614, 61 extending upward from four sides of the rectangular bottom plate 611.
5 are erected, and a flange 6 is directed outward from the upper edge thereof.
It has a box-like shape with an opening at the top where 16 is provided. The side plates 612 and 614 on the short side of the box-shaped structure 6 include
A through hole through which the exterior main pipes 52 and 53 are inserted is provided, and the exterior main pipes 52 and 53 extend outward from the peripheral wall of the through hole.
Locking cylinders 617 and 618 with which the 53 is engaged are extended. Male threads for fastening cap nuts are provided on the outer peripheral surface of the distal end portions of the locking cylinders 617 and 618.

The side plate 613 on one long side is provided with a through-hole through which the exterior branch pipe 54 is inserted, and the exterior branch pipe 54 engages from the peripheral wall of the through hole outward. A locking cylinder (not shown) is extended. A male screw for fastening a cap nut is provided on the outer peripheral surface of the distal end portion of the locking cylinder. The lid 62 is formed of a rectangular plate whose peripheral edge can be placed on the flange 616 of the box-shaped main body 61.

In the box-shaped main body 61 of the box-shaped structure 6, an exterior branch joint 61 having a double piping structure and an adjacent portion thereof are disposed, and the exterior main pipes 52 and 53 are connected to the locking cylinder 61 of the box-shaped main body 61.
7, 618 is drawn out of the box-shaped structure 6 at the other end so as to pass through the inside of the box-shaped main body 61. It is led out of the structure 6. By fastening the cap nut 63 to the locking cylinders 617 and 618, the outer main pipes 52 and 53 are connected to the locking cylinder 61 via packing (not shown).
7,618 are engaged in a water-stop state. Further, by tightening the cap nut 63 through the locking tube, the outer branch pipe 54 is engaged with the locking tube in a water-stop state via a packing (not shown).

The lid 62 is placed on the box-shaped main body 61, and its outer peripheral edge is fastened to the flange 615 of the box-shaped main body 61 by a fastener (not shown). Thus, in the piping equipment of this example, the exterior branch joint 51 having the double piping structure including the interior piping 4 and the exterior piping 5 and the adjacent portion thereof are:
Furthermore, it is arranged in the box-shaped structure 6, and this part is in a double protection state.

If a leak occurs outside the interior piping 4 while a liquid chemical or the like flows down into the interior piping 4 of the piping equipment, the gap between the interior piping 4 and the exterior piping 5 is small, Even when the amount of leakage is small, it can be detected at an early stage by the sensor, and the leakage liquid can be collected at one place through the exterior pipe 5 at an early stage to perform waste liquid treatment. Also, when a large amount of liquid chemical or the like flows out of the exterior pipe 5 due to a serious damage accident that also damages the branch portion of the exterior pipe line 5, the leaked liquid is not scattered to the outside and a box-shaped It can be stored in the structure 6. In this case, the line is stopped, the lid 62 of the box-shaped structure 6 is opened, and the waste liquid in the box-shaped structure 6 is treated. At this time, it is preferable to open the upper half of the exterior branch joint 51 that is of the vertical split type to discharge the leakage liquid in the exterior pipeline 5. Thereby, the load on the exterior pipe 5 can be reduced.

[0034]

Since the piping system of the present invention has the above-described configuration, it is possible to supply or drain water or liquid chemicals such as acids, alkalis, salts, and solvents at the initial stage of leakage of liquid chemicals. Can detect the leaked liquid at an early stage and treat the leaked liquid through the external piping, and a large amount of liquid chemical leaks due to a serious damage accident that also damages the branch part of the external piping When the liquid leaks out, the leaked liquid can be stored in the box-shaped structure without scattering to the outside.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an example of a piping system of the present invention.

FIG. 2 is a front view showing an example of an exterior branch joint used in the piping facility shown in FIG.

3A and 3B are explanatory views showing another example of the piping equipment of the present invention, wherein FIG. 3A is a partial cross-sectional view in plan view showing a state where a lid is removed, and FIG. It is.

4 is an explanatory view showing an example of an exterior branch joint used in the piping facility shown in FIG. 3, (a) is a front view thereof,
(B) is a side view thereof.

FIG. 5 is a schematic diagram showing an example of a conventional piping facility.

[Description of Signs] 1,4 Interior piping 2,5 Exterior piping 3,6 Box-shaped structure 11,41 Interior branch joint 12,13,42,43 Interior main pipe 14,44 Interior branch pipe 22,23,52,53 Exterior main pipe 24, 54 Exterior branch pipe 111, 411, 412 Main pipe receiving port (pipe connection part) 113, 413 Branch pipe receiving port (pipe connection part) 31, 61 Box-shaped main body 32, 62 Lid 317, 318, 319, 617,618 Locking cylinder

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J071 AA11 BB11 CC03 CC06 DD30 EE37 FF16 3J106 AB03 BA01 BB04 BC06 BD01 BE40 CA01

Claims (2)

[Claims] 1. An interior pipe in which one end of an interior pipe is connected to each pipe connection portion of the interior branch joint, and laying so as to cover an outer periphery of the interior pipe, and The external branch joint of the double piping structure and the adjacent portion thereof have a double piping structure including an external piping in which one end of the external pipe is connected to each pipe connection portion of the external branch joint provided. The other end side is led out of the box-shaped structure so that each of the exterior pipes penetrates the box-shaped structure, and the exterior pipes pass through the box-shaped structure. A pipe installation characterized in that it is engaged in a water-stop state at a location where the pipe is to be cut. 2. The piping system according to claim 1, wherein the exterior branch joint is a split type.