JP2022091060A - Inspection method of siphon drainage system and jig - Google Patents

Abstract

To improve efficiency of inspection of lateral pulling pipes in a siphon drainage system in a building for tenant use.SOLUTION: An inspection method of a siphon drainage system 20 comprising a lateral pulling pipe 28 that extends in a lateral direction and flows drain water from a water supply instrument, a vertical pipe 36 that is arranged on the downstream side of the lateral pulling pipe 28 and extends in the substantially vertical direction, and a connection part 50 that connects the lateral pulling pipe 28 and the vertical pipe 36, includes a lateral pulling pipe inspection step of injecting air into the lateral pulling pipe 28 from a cleaning port 54 for cleaning the inside of the pipe formed in the connection part 50 to inspect fluid leakage of the lateral pulling pipe 28.SELECTED DRAWING: Figure 9

Description

The present invention relates to an inspection method and a jig for a siphon drainage system.

In Patent Document 1, a horizontal pulling pipe extending in the lateral direction and flowing drainage from a water circulation device, a vertical pipe arranged on the downstream side of the horizontal pulling pipe and extending substantially in the vertical direction, and a horizontal pulling pipe are described. A siphon drainage system comprising a joint connecting to a vertical pipe is disclosed.

Japanese Unexamined Patent Publication No. 2020-6565

If the building in which the siphon drainage system described in Patent Document 1 is installed is for tenant use and the building is constructed in a state where the tenant is undecided, the horizontal pipe of the siphon drainage system is not constructed and the tenant After it is decided, it will be installed on the upstream side of the joint. On the other hand, the vertical pipe of the siphon drainage system will be constructed even if the tenant is undecided. When constructing a siphon drainage system, it is necessary to inspect the pipeline for fluid leaks. Since the vertical pipe will be constructed even if the tenant is undecided, the vertical pipe will be inspected for fluid leakage by injecting an inspection fluid at the time of construction. After that, when the horizontal pulling pipe is constructed after the tenant is decided, the horizontal pulling pipe is inspected for fluid leakage during the construction. As described above, the siphon drainage system installed in the building for tenant use needs to be inspected for fluid leakage twice at the time of construction. When the inspection fluid is injected from the vertical pipe in this inspection, the inspection fluid is injected into the horizontal pulling pipe via the vertical pipe, so that the vertical pipe is filled with the inspection fluid by the time the inspection fluid reaches the horizontal pulling pipe. It takes time to be done.

The present invention has been made in view of the above situation, and an object of the present invention is to improve the efficiency of inspection of a horizontal pipe of a siphon drainage system in a building for tenant use.

The inspection method of the siphon drainage system according to the first aspect extends laterally and is arranged in a horizontal pulling pipe for flowing drainage from a water supply device and a downstream side of the horizontal pulling pipe, and extends in a substantially vertical direction. It is an inspection method of a siphon drainage system including an existing vertical pipe and a connection portion for connecting the horizontal pulling pipe and the vertical pipe, and is a method of inspecting the siphon drainage system from the cleaning port for cleaning the inside of the pipe formed in the connection portion. It includes a horizontal pulling pipe inspection step of injecting an inspection fluid into the pulling pipe and inspecting the fluid leakage of the horizontal pulling pipe.

According to the inspection method of the siphon drainage system according to the first aspect, in a building for tenant use, when inspecting a fluid leak after the tenant is decided, only the horizontal pulling pipe can be inspected, so that the siphon drainage can be inspected. The efficiency of system inspection can be improved.

The method for inspecting a siphon drainage system according to a second aspect further includes a vertical pipe inspection step for inspecting a fluid leak in the vertical pipe in the method for inspecting a siphon drainage system according to the first aspect.

According to the inspection method of the siphon drainage system according to the second aspect, in the building for tenant use, the vertical pipe can be inspected before the tenant is decided, so that the efficiency of the inspection of the siphon drainage system can be improved.

The method for inspecting the siphon drainage system according to the third aspect is the inspection method for the siphon drainage system according to the second aspect. In the vertical pipe inspection step, the vertical pipe is inspected in a state where the horizontal pulling pipe is not connected. do.

According to the inspection method of the siphon drainage system described in the third aspect, in a building for tenant use, the vertical pipe can be inspected before the tenant is decided, and only the horizontal pulling pipe can be inspected after the tenant is decided. The efficiency of inspection of siphon drainage system can be improved.

The inspection method for the siphon drainage system according to the fourth aspect is the arrangement for arranging an inspection jig at the cleaning port in the inspection method for the siphon drainage system according to any one of the first to third aspects. Including the process.

According to the inspection method of the siphon drainage system according to the fourth aspect, in a building for tenant use, a worker who constructs the horizontal pulling pipe can inspect the fluid leakage of the horizontal pulling pipe by using the cleaning port. The efficiency of inspection of siphon drainage system can be improved.

The method for inspecting the siphon drainage system according to the fifth aspect is the method for inspecting the siphon drainage system according to the fourth aspect. Seal the gap.

According to the inspection method of the siphon drainage system according to the fifth aspect, since the inspection fluid is suppressed from flowing to the vertical pipe by the jig, the efficiency of inspection of the siphon drainage system can be improved.

The inspection method for the siphon drainage system according to the sixth aspect is the inspection method for the siphon drainage system according to any one of the first to fifth aspects, wherein the inspection fluid is air.

According to the inspection method of the siphon drainage system according to the sixth aspect, it is not necessary to bleed air in the pipe in the inspection as compared with the case where the inspection fluid is a liquid, so that the efficiency of the inspection of the siphon drainage system is improved. Can be done.

The jig according to the seventh aspect is a horizontal pulling pipe extending in the lateral direction and flowing drainage from a water supply device, and a vertical pipe arranged on the downstream side of the horizontal pulling pipe and extending substantially in the vertical direction. Is a jig placed at the cleaning port of the connection portion where the cleaning port for cleaning the inside of the pipe is formed, and is located on the upstream side in the drainage direction or the downstream side in the drainage direction from the cleaning port. A sealing portion that seals a gap with a pipeline, a protruding portion that protrudes from the sealing portion toward the cleaning port, and an inner protrusion of the protruding portion and the sealing portion of the protruding portion. It has a flow path that communicates from an end opposite to the sealing portion to an end on the upstream side in the drainage direction of the sealing portion and is open toward the horizontal pulling pipe.

According to the jig described in the seventh aspect, in a configuration having a flow path that opens toward the horizontal pulling pipe, the gap between the drainage direction upstream side or the drainage direction downstream side of the cleaning port is closed. Compared to the unstopped configuration, the fluid flowing from the flow path into the horizontal pipe is suppressed from flowing into the vertical pipe.

As described above, according to the inspection method of the siphon drainage system according to the present invention, it is possible to improve the efficiency of inspection of the horizontal pull pipe of the siphon drainage system in a building for tenant use.

It is a front view which shows the whole structure of the siphon drainage system which concerns on embodiment of this invention. It is a perspective view which made a part which shows the connection part which concerns on embodiment of this invention with a cross section. It is an exploded perspective view which made a part which shows the connection part which concerns on embodiment of this invention with a cross section. It is a top view of the connection part which concerns on embodiment of this invention. It is a front view which shows the drainage pipe and the vertical pipe which concerns on embodiment of this invention. It is a front view which shows the state which the horizontal pulling pipe is attached to the connection part which concerns on embodiment of this invention. It is a perspective view of the jig for inspection which concerns on embodiment of this invention. It is sectional drawing of the jig for inspection which concerns on embodiment of this invention. It is a front sectional view of the connection part which inserted the jig for inspection which concerns on embodiment of this invention. It is a perspective view of the modification of the jig for inspection which concerns on this invention. It is sectional drawing of the modification of the jig for inspection which concerns on this invention. It is a front sectional view which shows the modification of the jig for inspection which concerns on this invention, and the modification of the connection part which inserted the jig.

Hereinafter, the inspection method of the siphon drainage system 20 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 12.

(Outline of siphon drainage system)
As shown in FIG. 1, the siphon drainage system 20 is provided in a building 10 composed of a plurality of floors, and is provided from a water supply device provided on each floor of the building 10 by utilizing siphon force. It is a drainage system that efficiently discharges the wastewater from the building.

The building 10 is a building for tenants, and has a plurality of exclusive zones 10a for tenants partitioned by a floor slab 14 and a partition wall 16. Further, the building 10 is provided with a drainage pipe 12 for draining drainage downward. The drain pipe 12 extends in the vertical direction (vertical direction) of the building 10 and penetrates the floor slab 14 of each floor of the building 10. The drainage pipe 12 is arranged outside the partition wall 16 of each exclusive zone 10a, for example, in the meter box 18. A plurality of merging joints 40 are provided in the middle portion of the drainage pipe 12, and drainage from a plurality of floors flows into the drainage pipe 12 through the plurality of merging joints 40.

A water supply device 11 is provided in each of the plurality of exclusive zones 10a. The water supply device 11 is, for example, a kitchen sink, and includes a disposer 11a connected to the drainage direction downstream side of the water supply device 11 and a drain trap 11b connected to the drainage direction downstream side of the disposer 11a. Further, the water supply device 11 includes an L-shaped piping member 26 connected to the downstream side in the drainage direction of the drain trap 11b. The piping member 26 has a vertical portion 26a connected to the drain trap 11b and extending in the vertical direction, a horizontal portion 26b arranged on the floor slab 14 and extending in the horizontal direction, and a vertical portion 26a. It has a bent portion 26c that connects the horizontal portion 26b and the horizontal portion 26b. The bent portion 26c is connected to the horizontal pulling pipe 28 (details will be described later) of the siphon drainage system 20 via a joint 30.

(Siphon drainage system 20)
The siphon drainage system 20 includes a horizontal pulling pipe 28, a vertical pipe 36, and a connecting portion 50. The horizontal pulling pipe 28 is a tubular member arranged on the floor slab 14 and extending in the horizontal direction. One end of the horizontal pulling pipe 28 is connected to the bent portion 26c of the water circulation device 11 via the joint 30, and the other end is joined to the vertical pipe 36 arranged in the meter box 18. And are connected via the connecting portion 50. That is, the horizontal pulling pipe 28 is arranged so as to penetrate the partition wall 16 and extend over the exclusive section 10a and the meter box 18. The vertical pipe 36 is a tubular member extending in the vertical direction, and is arranged so as to penetrate the floor slab 14 in the meter box 18 in the vertical direction. The upper end of the vertical pipe 36 is connected to the end of the horizontal pulling pipe 28 opposite to the joint 30 via the connecting portion 50, and the lower end is connected to the drain pipe 12 via the merging joint 40. Is connected.

(Connection part 50)
As shown in FIGS. 2 and 3, the connection portion 50 includes a main body portion 52, a cleaning port 54, and a lid portion 56. The main body 52 is a tubular member formed in a substantially L shape. The connecting portion 50 includes a horizontal portion 52a extending along the axial direction of the horizontal pulling pipe 28, a vertical portion 52b extending downward along the axial direction of the vertical pipe 36, and a horizontal portion 52a. It has a bent portion 52c that connects the vertical portion 52b. The inner diameter of the horizontal portion 52a and the inner diameter of the vertical portion 52b are uniform with each other.

Further, a first connecting portion 60 is formed at an end portion of the horizontal portion 52a opposite to the bent portion 52c. Further, a second connecting portion 62 is formed at an end portion of the vertical portion 52b opposite to the bent portion 52c.

The first connection portion 60 is formed in a cylindrical shape having a diameter larger than that of the main body portion 52, and by inserting a joint 32 connected to the horizontal pull pipe 28 inside, the connection portion 50 and the horizontal pull pipe 28 are formed. Is connected. The second connection portion 62 is formed in a cylindrical shape having a diameter larger than that of the main body portion 52, and the connection portion 50 and the vertical pipe 36 are connected by inserting the upper end portion of the vertical pipe 36 inside. There is. In this way, the connecting portion 50 connects the horizontal pulling pipe 28 and the vertical pipe 36.

(Cleaning port 54)
The cleaning port 54 is a substantially cylindrical portion of the bent portion 52c that is formed on the outer wall 64 on the side opposite to the vertical portion 52b across the horizontal portion 52a and extends so as to project upward from the portion. be. The inner diameter of the cleaning port 54 is larger than the inner diameter of the horizontal portion 52a and the inner diameter of the vertical portion 52b. The upper end of the cleaning port 54 is an open end 54a.

The outer wall 64, which is the bottom of the cleaning port 54, is formed with an opening 66 for connecting the cleaning port 54 and the bent portion 52c. The opening 66 is formed in a substantially rectangular shape that is long in a plan view, and its longitudinal direction coincides with the axial direction of the horizontal pulling pipe 28. Further, the opening 66 is formed at a position overlapping the horizontal portion 52a and the vertical portion 52b of the main body portion 52 in a plan view. Specifically, as shown in FIG. 4, the opening 66 is formed to be one size larger than the inner diameters of the horizontal portion 52a and the vertical portion 52b in a plan view. As a result, the cleaning port 54 makes the inside of the horizontal portion 52a and the vertical portion 52b visible through the opening 66. Further, the cleaning port 54 allows a cleaning device (not shown) such as a cleaning nozzle to be inserted into the inside of the horizontal pulling pipe 28 from the opening 66 via the horizontal portion 52a so that the inside of the horizontal pulling pipe 28 can be cleaned. .. Further, the cleaning port 54 allows a cleaning tool such as a cleaning nozzle (not shown) to be inserted into the inside of the vertical pipe 36 from the opening 66 via the vertical portion 52b so that the inside of the vertical pipe 36 can be cleaned.

A male screw portion 72 is formed on the outer peripheral portion of the cleaning port 54 on the opening end 54a side. Further, an annular groove 74 to which the O-ring 76 can be mounted is formed on the outer peripheral portion of the cleaning port 54 below the male screw portion 72.

The lid portion 56 is a bottomed cylindrical member provided so as to cover the open end 54a of the cleaning port 54. A female screw portion 56a corresponding to the male screw portion 72 of the cleaning port 54 is formed on the inner peripheral portion of the lid portion 56. As a result, the lid portion 56 can be attached to and detached from the cleaning port 54. Further, the lid portion 56 has a contact portion 56b that comes into contact with the O-ring 76 mounted in the annular groove 74 of the cleaning port 54 when attached to the cleaning port 54. As a result, the lid portion 56 is attached to the cleaning port 54 and seals the gap between the cleaning port 54 and the lid portion 56 when the water supply device 11 is used.

The siphon drainage system 20 is detachably attached to an end portion of the first connection portion 60 opposite to the main body portion 52 in a state where the connection portion 50 is not connected to the horizontal pull pipe 28, and the end portion thereof. A closing member (not shown) such as a lid for sealing by closing the siphon is provided.

(Method of inspecting fluid leakage of siphon drainage system 20)
Next, the procedure of the inspection method for inspecting the fluid leakage of the siphon drainage system 20 of the present embodiment will be described below.

(1) First, at the time of construction of the building 10, as shown in FIG. 5, after the drain pipe 12 is constructed, the vertical pipe 36 of the siphon drainage system 20 connected to the drain pipe 12 via the merging joint 40. Is constructed, and the connection portion 50 is attached to the upper end of the vertical pipe 36.

(2) Next, the connection portion 50 is sealed by attaching a closing member (not shown) such as a lid portion 56 and a lid to each of the cleaning port 54 of the connection portion 50 and the first connection portion 60. In this state, the drain pipe 12 and the vertical pipe 36 are inspected for fluid leakage by injecting air into the drain pipe 12 and the vertical pipe 36 using an injection means (not shown) such as an air pump (first inspection step). .. In other words, in the first inspection step, the vertical pipe 36 is inspected in a state where the horizontal pulling pipe 28 is not connected. The first inspection step is an example of a vertical pipe inspection step. Air is also an example of an inspection fluid.

(3) When the result of the first inspection step is good and the tenant of the exclusive zone 10a is decided, as shown in FIG. 6, the closing member such as the lid from the first connecting portion 60 of the connecting portion 50 (Not shown) is removed, and the horizontal pulling pipe 28 is attached. After that, the end portion of the horizontal pull pipe 28 on the upstream side in the drainage direction is sealed by closing it with a closing member (not shown) such as a lid.

(4) Next, the lid portion 56 is removed from the cleaning port 54 of the connection portion 50 to open the opening 66. After that, as shown in FIG. 9, the inspection jig 80 is arranged in the cleaning port 54 of the connection portion 50 (arrangement step).

As shown in FIG. 9, the jig 80 is arranged in the main body 81 inserted into the pipe of the horizontal portion 52a from the cleaning port 54 of the connection portion 50, and in the cleaning port 54, and is arranged in the cleaning port 54. It is configured to include a positioning tool 90 for positioning the main body 81. Further, the jig 80 includes a main body portion 81 and a lid portion 92 that covers the cleaning port 54 in which the positioning tool 90 is arranged.

As shown in FIGS. 7 and 8, the main body 81 is a cylindrical member having a substantially L-shaped shape. The main body portion 81 extends upward along the axial direction of the vertical pipe 36 from the horizontal portion 82 extending along the axial direction of the horizontal plumb pipe 28 and the end portion of the horizontal portion 82 on the downstream side in the drainage direction. It is configured to include a vertical portion 84 and a vertical portion 84.

The horizontal portion 82 is a bottomed cylindrical member whose outer peripheral portion can be fitted to the inner peripheral portion of the horizontal portion 52a of the connecting portion 50. An annular groove 82a to which the O-ring 86 can be mounted is formed on the outer peripheral portion of the end portion of the horizontal portion 82 on the upstream side in the drainage direction. Further, a hole 82b penetrating from the outer peripheral portion to the inner peripheral portion of the horizontal portion 82 is formed in the upper outer peripheral portion at the end portion of the horizontal portion 82 on the downstream side in the drainage direction. Further, a female screw portion 82c is formed on the inner peripheral wall of the hole 82b.

The vertical portion 84 is a substantially cylindrical member that is attached to the hole 82b of the horizontal portion 82 and extends upward. A male screw portion 84a corresponding to the female screw portion 82c of the horizontal portion 82 is formed on the outer peripheral portion of the lower end portion of the vertical portion 84. Further, a substantially cylindrical coupling 84b that can be connected to an injection means (not shown) such as an air pump is attached to the upper end of the vertical portion 84. The vertical portion 84 is attached to the horizontal portion 82 in a state where the hole 82b is sealed by fastening the male screw portion 84a to the female screw portion 82c of the horizontal portion 82. When fastening the vertical portion 84 and the horizontal portion 82, it is preferable to use a sealing material (not shown) such as sealing tape for the male screw portion 84a or the female screw portion 82c which is the fastening portion. Further, the vertical portion 84 is attached to the horizontal portion 82 so that the lower end portion does not protrude from the inner peripheral portion of the horizontal portion 82. In this way, the main body portion 81 communicates from the upper end portion of the coupling 84b to the end portion of the horizontal portion 82 on the annular groove 82a side via the vertical portion 84, and the flow path through which air can flow in. Has 88.

As shown in FIG. 9, the main body portion 81 has a horizontal portion of the connecting portion 50 from the end portion of the horizontal portion 82 on the annular groove 82a side in a state where the O-ring 86 is mounted on the annular groove 82a of the horizontal portion 82. It is inserted inside 52a. At this time, the horizontal portion 82 to which the O-ring 86 is mounted seals the gap between the horizontal portion 82 and the horizontal portion 52a of the connecting portion 50. In other words, the horizontal portion 82 of the jig 80 seals the gap with the pipeline on the upstream side in the drainage direction from the cleaning port 54. The horizontal portion 82 is an example of a sealing portion. Further, at this time, the main body portion 81 is inserted so that a part of the vertical portion 84 protrudes from the opening 66. In other words, the vertical portion 84 projects from the horizontal portion 82 toward the cleaning port 54. The vertical portion 84 is an example of a protruding portion. Further, at this time, in the flow path 88 of the main body portion 81, the portion on the horizontal portion 82 side is opened toward the horizontal pulling pipe 28.

The positioning tool 90 is a substantially disk-shaped member having a thickness in which the outer peripheral portion thereof fits with the inner peripheral portion of the cleaning port 54. A through hole 90a is formed in the central portion of the positioning tool 90 to fit the outer peripheral portion of the vertical portion 84 of the main body portion 81. The positioning tool 90 positions the position of the main body 81 around the vertical direction by fitting the outer peripheral portion with the inner peripheral portion of the cleaning port 54 and the through hole 90a with the outer peripheral portion of the vertical portion 84. ..

The lid portion 92 is a bottomed cylindrical member provided so as to cover the open end 54a of the cleaning port 54 in which the main body portion 81 is arranged. A female screw portion 92a corresponding to the male screw portion 72 of the cleaning port 54 is formed on the inner peripheral portion of the lid portion 92. As a result, the lid portion 92 can be attached to and detached from the cleaning port 54. Further, the lid portion 92 has a contact portion 92b that comes into contact with the O-ring 76 mounted in the annular groove 74 of the cleaning port 54 when attached to the cleaning port 54. As a result, the lid portion 92 is attached to the cleaning port 54 and seals the gap between the cleaning port 54 and the lid portion 92 when the water supply device 11 is used. Further, the lid portion 92 is formed with a through hole 92c in which the outer peripheral portion of the vertical portion 84 protruding from the cleaning port 54 is fitted in the central portion of the end surface. As a result, the jig 80 is arranged in the cleaning port 54 with the vertical portion 84 and the coupling 84b of the main body portion 81 protruding from the cleaning port 54 and sealing the cleaning port 54. It is preferable that a sealing member such as an oil seal is provided around the through hole 92c.

(5) After the jig 80 is arranged at the cleaning port 54 of the connection portion 50, an injection means (not shown) such as an air pump is connected to the coupling 84b, and the inside of the horizontal pulling pipe 28 is connected via the jig 80. Inject air. In other words, air is injected into the horizontal pulling pipe 28 from the cleaning port 54 formed in the connecting portion 50. In this way, by injecting air into the horizontal pulling pipe 28 from the cleaning port 54 of the connecting portion 50, the fluid leakage of the horizontal pulling pipe 28 is inspected (second inspection step). The second inspection step is an example of the horizontal pull pipe inspection step.

(6) When the result of the second inspection step is good, the jig 80 is removed from the cleaning port 54 of the connection portion 50, the lid portion 56 is attached to the cleaning port 54, and the cleaning port 54 is sealed. After that, as shown in FIG. 1, a water supply device 11 is installed in the exclusive zone 10a and connected to the horizontal pulling pipe 28.

The above is the procedure of the inspection method of the siphon drainage system 20 of the present embodiment.

(Action and effect)
Next, the operation and effect of the inspection method of the siphon drainage system 20 of the present embodiment will be described. In this description, when a component or the like similar to the siphon drainage system 20 is used when describing the comparative embodiment with respect to the embodiment, the reference numeral and the name of the component or the like will be used as they are.

The building 10 on which the siphon drainage system 20 is constructed is a building for tenants having a plurality of exclusive zones 10a. The building 10, which is a building for tenants, will be constructed even if the exclusive zone 10a is undecided. If the exclusive zone 10a is undecided, the horizontal pulling pipe 28 of the siphon drainage system 20 is not constructed, and is constructed after the exclusive zone 10a is determined. On the other hand, the vertical pipe 36 of the siphon drainage system 20 is constructed together with the drainage pipe 12 even when the tenant is undecided. When constructing the siphon drainage system 20, it is necessary to inspect for fluid leakage in the pipeline. Since the vertical pipe 36 is constructed even when the tenant is undecided, the vertical pipe 36 is inspected for fluid leakage by injecting an inspection fluid at the time of construction. After that, when the horizontal pulling pipe 28 is constructed after the tenant is determined, the horizontal pulling pipe 28 is inspected for fluid leakage during the construction. As described above, the siphon drainage system 20 constructed in the building 10 for tenant use needs to be inspected for fluid leakage twice at the time of construction. When the inspection fluid is injected from the vertical pipe 36 in this inspection, the inspection fluid is injected into the horizontal pulling pipe 28 via the vertical pipe 36, so that the inspection fluid reaches the horizontal pulling pipe 28 by the time the inspection fluid reaches the vertical pipe 36. Requires time to be filled with the test fluid.

On the other hand, the inspection method of the siphon drainage system 20 of the embodiment is a second inspection in which air is injected into the horizontal pulling pipe 28 from the cleaning port 54 formed in the connection portion 50 to inspect the fluid leakage of the horizontal pulling pipe 28. Including the process. Therefore, the inspection method of the siphon drainage system 20 of the embodiment can inspect only the horizontal pulling pipe 28 when inspecting the fluid leakage after the tenant is determined in the building 10 for tenant use, so that the siphon drainage can be inspected. The efficiency of inspection of the system 20 can be improved.

Further, the inspection method of the siphon drainage system 20 of the embodiment includes a first inspection step of inspecting the fluid leakage of the vertical pipe 36. Therefore, the inspection method of the siphon drainage system 20 of the embodiment can improve the efficiency of the inspection of the siphon drainage system 20 because the vertical pipe 36 can be inspected before the tenant is determined in the building 10 for tenant use.

Further, in the inspection method of the siphon drainage system 20 of the embodiment, in the first inspection step, the vertical pipe 36 is inspected in a state where the horizontal pulling pipe 28 is not connected. Therefore, in the inspection method of the siphon drainage system 20 of the embodiment, in the building 10 for tenant use, the vertical pipe 36 can be inspected before the tenant is decided, and only the horizontal pulling pipe 28 can be inspected after the tenant is decided. Therefore, the inspection method of the siphon drainage system 20 of the embodiment can improve the efficiency of the inspection of the siphon drainage system 20 in the building 10 for tenant use.

Further, the inspection method of the siphon drainage system 20 of the embodiment includes an arrangement step of arranging the inspection jig 80 in the cleaning port 54. Therefore, in the inspection method of the siphon drainage system 20 of the embodiment, the worker who constructs the horizontal pull pipe 28 arranges the jig 80 at the cleaning port 54 of the connection portion 50 arranged in the same layer as the horizontal pull pipe 28. Then, the fluid leakage of the horizontal pulling pipe 28 can be inspected. Therefore, the inspection method of the siphon drainage system 20 of the embodiment can improve the efficiency of the inspection of the siphon drainage system 20 in the building 10 for tenant use.

Further, in the inspection method of the siphon drainage system 20 of the embodiment, the jig 80 seals the gap with the pipeline on the upstream side of the cleaning port 54. Therefore, in the inspection method of the siphon drainage system 20 of the embodiment, since the inspection fluid is suppressed from flowing to the vertical pipe 36 by the jig 80, the inspection efficiency of the siphon drainage system 20 can be improved.

Further, in the inspection method of the siphon drainage system 20 of the embodiment, the inspection fluid is air. Therefore, the inspection method of the siphon drainage system 20 of the embodiment does not require air bleeding in the pipe in the inspection as compared with the case where the inspection fluid is a liquid, so that the inspection efficiency of the siphon drainage system 20 can be improved. can.

Further, the jig 80 of the embodiment includes a horizontal portion 82 that seals a gap with a pipeline on the upstream side in the drainage direction from the cleaning port 54, a flow path 88 that opens toward the horizontal pull pipe 28, and a flow path 88. Has. Therefore, in the first inspection step, the jig 80 of the embodiment is connected to the flow path 88 from the flow path 88 as compared with the configuration in which the gap with the pipeline on the upstream side or the downstream side in the drainage direction from the cleaning port 54 is not sealed. The air flowing into (injecting) into the horizontal pulling pipe is suppressed from flowing into the vertical pipe 36. That is, in the inspection method of the siphon drainage system 20 of the embodiment, the efficiency of the inspection of the siphon drainage system 20 can be improved by using the jig 80.

As described above, the embodiments of the present invention have been described in detail, but the present invention is not limited to the above-described embodiments, and various modifications, changes, and improvements can be made within the scope of the technical idea of the present invention. It is possible.

For example, the siphon drainage system 20 of the embodiment is configured to include a main body portion 52 in which the connecting portion 50 is formed in a substantially L shape. However, the connection portion according to the present invention is not limited to the one in which the shape of the main body portion 52 is substantially L-shaped as long as the cleaning port 54 is formed. For example, as shown in FIG. 12, the connecting portion 150 according to the present invention is a tubular member in which the main body portion 152 extends along the axial direction of the horizontal pulling pipe 28, and is the outer periphery of the main body portion 152. The cleaning port 154 may be formed so as to project from above the portion. In the siphon drainage system 120 including the connection portion 150, the vertical pipe 36 is connected to the connection portion 150 via a joint 140 that is bent in an L shape.

Further, in the inspection method of the siphon drainage system 20 of the embodiment, air is used as the inspection fluid. However, in the inspection method of the siphon drainage system 20 according to the present invention, a liquid such as water may be used as the inspection fluid.

Further, the jig 80 of the embodiment is configured to include a substantially L-shaped main body portion 81, and seals a gap with a pipeline on the upstream side in the drainage direction from the connection portion 50. However, the main body 81 of the jig according to the present invention is not limited to a substantially L-shaped one, and seals a gap with a pipeline on the downstream side in the drainage direction from the connection portion 50 according to the shape of the connection portion 150. It may have a structure to stop. For example, the main body 81 of the jig according to the present invention extends along the axial direction of the vertical pipe 36 in the connection portion 50 of the embodiment, and extends from the vertical portion 52b of the connection portion 50, that is, from the connection portion 50. It may also have a structure for sealing the gap with the pipeline on the downstream side in the drainage direction. Further, the jig according to the present invention may have a configuration in the above-mentioned connection portion 150 to seal a gap between the connection portion 150 and the pipeline on the downstream side in the drainage direction. Another embodiment of the jig according to the present invention is an inspection method of a siphon drainage system 120 using a jig 180 having a configuration for sealing a gap with a pipeline on the downstream side in the drainage direction from the connection portion 150. This will be described below. In this description, when the same parts and the like as those of the siphon drainage system 20 of the embodiment are used, the reference numerals and names of the parts and the like will be used as they are.

As shown in FIG. 12, the siphon drainage system 120 includes a connection portion 150 in which the above-mentioned cleaning port 154 is formed, instead of the connection portion 50 of the siphon drainage system 20 of the embodiment. Further, the siphon drainage system 120 arranges the inspection jig 180 at the cleaning port 154 in the arrangement process in the inspection of fluid leakage.

As shown in FIG. 12, the jig 180 is a main body inserted into a pipe on the downstream side of the main body 152 in the drainage direction from the cleaning port 154 of the connection portion 150 instead of the main body 81 of the jig 80 of the embodiment. It is configured to include a part 181.

As shown in FIGS. 10 and 11, the main body portion 181 is configured to include the horizontal portion 182 instead of the horizontal portion 82 of the main body portion 81 of the embodiment. The horizontal portion 182 extends along the axial direction of the main body portion 152 of the connection portion 150, and the outer peripheral portion of the end portion on the downstream side in the drainage direction is the inner peripheral portion of the main body portion 152 of the connection portion 150 on the downstream side in the drainage direction. It is a columnar member that can be fitted. An annular groove 182a to which the O-ring 86 can be mounted is formed on the outer peripheral portion of the horizontal portion 182 on the downstream side in the drainage direction. Further, a hole 182b to which the vertical portion 84 can be attached is formed in the upper outer peripheral portion of the horizontal portion 182 at the upstream end in the drainage direction. Further, a hole 182d that communicates with the hole 182b is formed on the end surface of the horizontal portion 182 on the upstream side in the drainage direction. As described above, the main body portion 181 communicates from the opening of the upper end portion of the coupling 84b to the hole 182d of the horizontal portion 182 via the vertical portion 84, and has a flow path 188 through which air can flow. There is.

As shown in FIG. 12, the main body portion 181 has an O-ring 86 mounted on the annular groove 182a of the horizontal portion 182, and the drainage direction of the connection portion 150 from the end portion of the horizontal portion 182 on the annular groove 182a side. It is inserted into the pipe on the downstream side. At this time, the horizontal portion 182 to which the O-ring 86 is mounted seals the gap between the horizontal portion 182 and the main body portion 152 of the connecting portion 150. In other words, the jig 180 seals the gap with the pipeline on the downstream side in the drainage direction from the cleaning port 154. The horizontal portion 182 is an example of a sealing portion. Further, at this time, the hole 182d of the horizontal portion 182 faces the upstream side in the drainage direction. In other words, the flow path 188 is open toward the horizontal pulling pipe 28. Except for the above points, the jig 180 has the same configuration as the jig 80. The jig 180 suppresses the flow of the inspection fluid into the vertical pipe 36 by sealing the gap with the pipeline on the downstream side in the drainage direction from the cleaning port 154. The jig 180 is connected to an injection means (not shown) such as an air pump in a state where the gap with the pipeline on the downstream side in the drainage direction from the cleaning port 154 is sealed, and the air injected from the injection means (not shown). Is injected into the horizontal pulling pipe 28 through the hole 182d. As a result, the air injected from the injection means (not shown) is suppressed from flowing to the vertical pipe 36.

11 ... Water supply equipment, 20 ... Siphon drainage system, 28 ... Horizontal plumb pipe, 36 ... Vertical pipe, 50 ... Connection part, 54 ... Cleaning port, 80 ... Jig, 82 ... Horizontal part (example of sealing part), 84 ... Vertical part (example of protruding part), 88 ... Flow path

Claims (7)

A horizontal pulling pipe extending in the lateral direction and flowing drainage from the water supply device, a vertical pipe arranged on the downstream side of the horizontal pulling pipe and extending substantially in the vertical direction, the horizontal pulling pipe and the vertical pipe. It is an inspection method of a siphon drainage system equipped with a connection part for connecting to and.
A method for inspecting a siphon drainage system including a horizontal pulling pipe inspection step of injecting an inspection fluid into the horizontal pulling pipe from a cleaning port for cleaning the inside of the pipe formed in the connection portion and inspecting a fluid leak in the horizontal pulling pipe. .. The method for inspecting a siphon drainage system according to claim 1, further comprising a vertical pipe inspection step for inspecting a fluid leak in the vertical pipe. The method for inspecting a siphon drainage system according to claim 2, wherein the vertical pipe inspection step inspects the vertical pipe in a state where the horizontal pulling pipe is not connected. The method for inspecting a siphon drainage system according to any one of claims 1 to 3, further comprising an arrangement step of arranging an inspection jig in the cleaning port. The method for inspecting a siphon drainage system according to claim 4, wherein the jig seals a gap between the jig and the pipeline on the upstream side in the drainage direction or the downstream side in the drainage direction from the cleaning port. The method for inspecting a siphon drainage system according to any one of claims 1 to 5, wherein the inspection fluid is air. A horizontal pulling pipe that extends in the horizontal direction and flows drainage from the water supply device and a vertical pipe that is located on the downstream side of the horizontal pulling pipe and extends in the substantially vertical direction are connected to clean the inside of the pipe. A jig placed at the cleaning port of the connection portion where the cleaning port for cleaning is formed.
A sealing portion that seals a gap between the pipe line on the upstream side in the drainage direction or the downstream side in the drainage direction from the cleaning port, and a sealing portion.
A protruding portion protruding from the sealing portion toward the cleaning port, and a protruding portion.
It is formed inside the protruding portion and the sealing portion, and communicates from the end portion of the protruding portion opposite to the sealing portion to the end portion of the sealing portion on the upstream side in the drainage direction. The flow path that opens toward the pipe and
Jig with.

Images