Valve device used when replacing horizontal drainage pipes, and the method for replacing horizontal drainage pipes.

Abstract

To provide a valve device used when renewing a drainage horizontal pipe and a renewal construction method of the drainage horizontal pipe, that prevent damage to downstream residences even in an event of accidental water discharge.SOLUTION: A valve device 100 for dividing a drainage horizontal pipe arranged to extend in a lateral direction into an upstream drainage horizontal pipe 210 arranged upstream and a downstream drainage horizontal pipe arranged downstream, and for renewing the downstream drainage horizontal pipe to a new downstream drainage horizontal pipe while storing drainage flowing into the upstream drainage horizontal pipe comprises: a valve part 50 that has a first joint 10 attached to a downstream end part of the upstream drainage horizontal pipe, an openable / closable valve 20 located downstream of the first joint, and a second joint 30 for attaching the downstream drainage horizontal pipe to an upstream end part of the new downstream drainage horizontal pipe; a hose part 80 that is detachably attached to the second joint in the valve part; and a tank part 90 that is attached to the hose part and stores drainage flowing into the upstream drainage horizontal pipe.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a valve device used when renewing a horizontal drain pipe and a method for renewing a horizontal drain pipe for renewing a horizontal drain pipe.

Background Art

[0002] In buildings such as buildings and condominiums, the wastewater discharged from each floor is collected in a so-called wastewater riser pipe, and is configured to be drained into the sewage through a horizontal drain pipe arranged on the lower floor of the building via the wastewater riser pipe. In recent years, as the construction years of such buildings have passed, not only the main body of the building but also the deterioration of the horizontal drain pipe has been regarded as a problem.

[0003] Therefore, a horizontal drain pipe renewal work for renewing a deteriorated horizontal drain pipe into a new horizontal drain pipe using joints and pipes is being carried out. As a joint used in such renewal work, for example, in Japanese Patent Laid-Open No. 2021-147921, a renewal joint used in a piping structure including a first joint, a second joint located downstream of the first joint, a first riser pipe extending downstream from the first joint, and a second riser pipe extending upstream from the second joint, the lower end of the first riser pipe is attached to the upper end, the upper end of the second riser pipe is attached to the lower end, a joint body, and a riser communication part provided between the lower end of the first riser pipe and the upper end of the second riser pipe, which is arranged in an intermediate part between the upper end and the lower end of the joint body, and an opening for taking out the riser communication part from the inside of the joint body to the outside is provided on the outer peripheral surface of the joint body.

[0004] Furthermore, a method for replacing piping in a piping structure is disclosed, comprising a first joint, a second joint located downstream of the first joint, a first riser extending downstream from the first joint, a second riser extending upstream from the second joint, and a replacement joint described in any one of claims 1 to 4 of the above publication, the method for replacing piping comprising a first step of bringing the riser connecting portion out from the inside to the outside of the joint body through the opening of the joint body.

[0005] When replacing horizontal drainage pipes using the above construction method, the resident is required to refrain from draining water before the work begins. However, there have been reports of residents forgetting that the work is being replaced despite these drainage restrictions, and accidentally draining water by using plumbing products. Such drainage is sometimes referred to as accidental drainage.

[0006] If water is accidentally discharged into a horizontal drainage pipe located on a lower floor of a building while replacement work is underway, the wastewater will leak out at the replacement work site, potentially causing damage not only to the building but also to the workers. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2021-147921 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0008] This invention was made in view of the aforementioned points, and its objective is to provide a valve device used to replace horizontal drainage pipes that will not cause damage to the building or workers even if water is accidentally discharged, and a method for replacing horizontal drainage pipes. [Means for solving the problem]

[0009] To solve the aforementioned problems, the valve device of the first aspect divides a horizontal drainage pipe, which is arranged to extend laterally, into an upstream horizontal drainage pipe located upstream and a downstream horizontal drainage pipe located downstream, and in order to store the wastewater flowing into the upstream horizontal drainage pipe and replace the downstream horizontal drainage pipe with a new downstream horizontal drainage pipe, the valve unit comprises a first joint attached to the downstream end of the upstream horizontal drainage pipe, an openable and closable valve located downstream of the first joint, and a second joint to be attached to the upstream end of the new downstream horizontal drainage pipe, a hose unit detachably attached to the second joint in the valve unit, and a tank unit attached to the hose unit for storing the wastewater flowing into the upstream horizontal drainage pipe, wherein the wastewater flowing into the upstream horizontal drainage pipe is stored in the tank unit via the valve unit and the hose unit.

[0010] Furthermore, the valve device in the second aspect is such that, in the first aspect, the valve section further comprises a transparent hollow tube between the first fitting and the valve, and a transparent hollow tube between the valve and the second fitting.

[0011] Furthermore, the valve device from the third perspective is one in which the valve is a ball valve in the first or second perspective.

[0012] To solve the aforementioned problems, the fourth method for replacing horizontal drainage pipes comprises: a horizontal drainage pipe division step, which divides a horizontal drainage pipe, which is arranged to extend laterally, into an upstream horizontal drainage pipe located upstream and a downstream horizontal drainage pipe located downstream; a valve section installation step, which involves attaching a valve section equipped with a second joint to the downstream end of the upstream horizontal drainage pipe, which is located upstream by the horizontal drainage pipe division step; a tank section installation step, which involves attaching a hose section that is detachably attached to the second joint in the valve section installed by the valve section installation step, and a tank section that is attached to the hose section and stores the wastewater that flows into the upstream horizontal drainage pipe; and a new downstream horizontal drainage pipe replacement step, which involves replacing the downstream horizontal drainage pipe with a new downstream horizontal drainage pipe.

[0013] Furthermore, the drainage horizontal pipe replacement method described in the fifth perspective is that, in the fourth perspective, the valve section further comprises a transparent hollow pipe between the first joint and the valve, and a transparent hollow pipe between the valve and the second joint.

[0014] Furthermore, the drainage horizontal pipe replacement method described in the sixth perspective is based on the premise that the valve is a ball valve, as stated in the fourth or fifth perspective. [Effects of the Invention]

[0015] As the present invention is configured and operates as described above, it is possible to provide a valve device used to replace horizontal drainage pipes that prevents damage to buildings and workers even if water is accidentally discharged, and a method for replacing horizontal drainage pipes. [Brief explanation of the drawing]

[0016] [Figure 1] This is a front view of the valve device of the first embodiment. [Figure 2] This is a front view of the valve section. [Figure 3] A is a conceptual diagram showing the horizontal drainage pipes on the lower floors of a building. B is a conceptual diagram showing an excerpt of the building illustrating the process of dividing the horizontal drainage pipes. [Figure 4] A is a conceptual diagram showing the valve unit installation process. B is a conceptual diagram showing the tank unit installation process. [Figure 5] A is a conceptual diagram showing the state where the downstream drainage lateral pipe 220 is removed. B is a conceptual diagram showing the process of installing a new downstream drainage lateral pipe. [Figure 6] A is a conceptual diagram showing the process of dividing the second drainage lateral pipe. B is a conceptual diagram showing the process of installing the second valve unit. [Figure 7] A is a conceptual diagram showing the lower floor of a high-rise building extracted to show the process S1 of dividing the second drainage lateral pipe. B is a conceptual diagram showing the state where the second downstream drainage lateral pipe, which was the upstream drainage lateral pipe, is removed. [Figure 8] A is a conceptual diagram showing the extracted lower floor in the state where the removal of the second downstream drainage lateral pipe has started. B is a conceptual diagram showing the extracted lower floor of a high-rise building to show the process of replacing the second downstream drainage lateral pipe. [Figure 9] It is a flowchart showing a method for updating a drainage lateral pipe that updates the drainage lateral pipe.

Best Mode for Carrying Out the Invention

[0017] Hereinafter, the valve device 100 of the first embodiment will be described with reference to the illustrated embodiments. The valve device 100 of the first embodiment divides a drainage lateral pipe 200 arranged to extend horizontally in the lower floor portion of a building T, for example, into an upstream drainage lateral pipe 210 and a downstream drainage lateral pipe 220 arranged at least upstream, stores the drainage flowing into the upstream drainage lateral pipe 210, and is attached to and used in the upstream drainage lateral pipe 210. Here, the upstream and downstream are based on the direction of the drainage flow with reference to the position where the valve device 100 of the first embodiment is attached, and in this embodiment, it flows in the direction of arrow X (see FIG. 3). Note that the lower floor refers to the floor where the drainage lateral pipe 200 for draining to the outside of the building T is arranged regardless of the first floor of the building T, and it may be arranged on the second floor or higher of the building T. It may also be arranged underground.

[0018] The valve device 100 of the first embodiment includes a first joint 10 attached to the downstream end 211 of the upstream drainage horizontal pipe 210 for storing the drainage flowing into the upstream drainage horizontal pipe 210, an openable and closable valve 20 disposed downstream of the first joint 10, and a second joint 30 for attaching to the upstream end 321 of a new downstream drainage horizontal pipe 320 obtained by renewing the downstream drainage horizontal pipe 220, a valve portion 50 having these components, a hose portion 80 having a tubular shape removably attached to the second joint 30 in the valve portion 50, and a tank portion 90 attached to the hose portion 80 for storing the drainage flowing into the upstream drainage horizontal pipe 210 from each floor.

[0019] Furthermore, the valve portion 50 may include a first hollow pipe 60 and a second hollow pipe 70. The first hollow pipe 60 and the second hollow pipe 70 are preferably hollow pipes made of transparent vinyl chloride, because the drainage can be visually observed. In particular, by applying a transparent vinyl chloride pipe, it is possible to visually observe the state of so-called inadvertent drainage flowing in from each floor into the valve device 100 by using plumbing products even during drainage regulation.

[0020] The first hollow pipe 60 is disposed between the first joint 10 and the valve 20 and is arranged to connect the first joint 10 and the valve 20. Also, the second hollow pipe 70 is disposed between the valve 20 and the second joint 30 and is arranged to connect the valve 20 and the second joint 30.

[0021] The valve 20 controls the flow of drainage by opening and closing. The valve 20 has a knob 21 for opening and closing. The knob 21 in the horizontal position is in the open state, and the knob 21' in the vertical position is in the closed state. The valve 20 is preferably a so-called ball valve.

[0022] The first joint 10 is used to connect to the downstream end 211 of the upstream drainage pipe 210, which is a division of the drainage pipe 200. The first joint 10 is preferably a so-called MD joint, which is called a Mechanical Drainage Joint, and is preferably a flexible joint for drainage steel pipes. Similarly, the second joint 30 is used to connect to the upstream end 221 of the downstream drainage pipe 220, which is a division of the drainage pipe 200. The second joint 30 is also preferably a so-called MD joint, which is sometimes called a Mechanical Drainage Joint, and is preferably a flexible joint for drainage steel pipes.

[0023] The hose section 80 is preferably a tubular, so-called hose-like structure, and a porosleeve can also be used. The tank section 90 is for storing wastewater.

[0024] Next, a method for replacing a horizontal drainage pipe using the valve section 50 and the valve device 100 of the first embodiment having the valve section 50 will be described.

[0025] This section describes the process of replacing a horizontal drainage pipe 200 that extends horizontally in the lower floors of building T. The horizontal drainage pipe 200 is positioned in the lower floors of the building to connect to a sewer system (not shown) (see Figure 3A).

[0026] Next, the drainage horizontal pipe 200 is separated and divided into an upstream drainage horizontal pipe 210 located upstream and a downstream drainage horizontal pipe 220 located downstream (drainage horizontal pipe division process S1, see Figure 3B).

[0027] Next, in the drainage horizontal pipe division process described above, the valve section 50 is attached to the downstream end 211, which is the end of the divided upstream drainage horizontal pipe 210 (valve section attachment process S2). At this time, the valve 20 is attached in a closed state (see Figure 4A).

[0028] Next, the drainpipe 200 is connected to the second joint 30 of the valve section 50 attached to the downstream end 211 of the divided upstream drainpipe 210. The hose section 80 and the tank section 90 attached to the hose section 80, which stores the wastewater that flows into the upstream drainpipe 210, are attached to the second joint 30 (see Figure 4B), and the valve 20 is opened (tank section attachment process S3). At this point, the valve device 100 of the first embodiment is configured. Furthermore, even if an upper-floor resident accidentally drains wastewater into the upstream drainpipe 210, the wastewater is stored in the tank section 90, so there is no damage to the lower floors of the building T where the drainpipe 200 is divided.

[0029] Next, with valve 20 open, the downstream drainage pipe 220 is removed (see Figure 5A), and the downstream drainage pipe 220 is replaced with a new downstream drainage pipe 320, which is connected to a drainage channel (not shown). At the same time, the hose section 80 and the tank section 90 are removed from valve section 50, and the new downstream drainage pipe 320 is connected to valve section 50. With valve section 50 attached to the downstream end 211 of the divided upstream drainage pipe 210, the second joint 30 of valve section 50 is attached to the upstream end 321 of the updated downstream drainage pipe 320 (new downstream drainage pipe installation process S4, see Figure 5B).

[0030] Next, it is determined whether or not there is a drainage horizontal pipe to be replaced (Drainage Horizontal Pipe Existence Determination Step S5). In this embodiment, since the drainage horizontal pipe is long, there is a drainage horizontal pipe to be replaced upstream of it. Therefore, the process returns to the Drainage Horizontal Pipe Division Step S1.

[0031] The subsequent steps are essentially a repetition of the steps described above. Each step will be explained by adding "second" to the description. Here, "second" refers to the second loop from S1 to S5 in the flowchart of Figure 9. Therefore, if the horizontal drainage pipes are long on the lower floors of building T, all of the horizontal drainage pipes 200 of building T can be replaced by repeating the process from the horizontal drainage pipe division step S1 to the replacement riser pipe existence determination step S5 as described above.

[0032] In building T, as shown in Figure 6A, for example, the second downstream drainage horizontal pipe 420 (which is downstream of the drainage horizontal pipe to be replaced next), which was the upstream drainage horizontal pipe 210 in building T, is separated from the second upstream drainage horizontal pipe 410 (second drainage horizontal pipe separation process S1, see Figure 6A).

[0033] Next, a valve section 50A is attached to the downstream end 411 of the divided second upstream drainage pipe 410 (second valve section attachment step S2). The valve section 50A is kept closed at this time. Then, a hose section 80A and a tank section 90A attached to the hose section 80A for storing the wastewater that flows into the upstream drainage pipe 410 are attached to the first fitting 30A of the valve section 50A, and the valve 20A is opened (second tank section attachment step S3). At this time, a second valve device 100A similar to the valve device 100 of the first embodiment is configured again (see Figure 7A). Also, at this time, even if an upstream resident accidentally drains wastewater into the second upstream drainage pipe 410, the wastewater is stored in the tank section 90A, so there is no damage to the lower floors where the second upstream drainage pipe 410 has been divided. Note that valve device 10 and valve device 10A are the same device, and in the flowchart of Figure 9, each component of valve device 10A used in the second loop from S1 to S5 (valve section 50A, its hose section 80A, tank section 90A, etc.) is indicated by the letter "A".

[0034] Next, with valve 20 open, the second downstream drainage horizontal pipe 420, which was the upstream drainage horizontal pipe 210, is removed (see Figure 7B). Then, the removed second downstream drainage horizontal pipe 420 is replaced with a new second downstream drainage horizontal pipe 500 (second new downstream drainage horizontal pipe replacement process S4. See Figure 8A).

[0035] Furthermore, it is determined whether or not there is a drainage horizontal pipe to be replaced (second drainage horizontal pipe replacement existence determination step S5). In this embodiment, there is no drainage horizontal pipe to be replaced, so the valve section 50 is then removed and the vertical pipe 600 is connected to the new second downstream drainage horizontal pipe 500. This completes the drainage horizontal pipe replacement work.

[0036] As described above, the valve device 100 of the first embodiment, which has a valve section 50 and a hose section 80 and a tank section 90, can replace a horizontal drainage pipe by performing the steps described above. Furthermore, the valve device 100 of the first embodiment having the valve section 50 configured above, and the horizontal drainage pipe replacement method using the valve device 100 of the first embodiment, can provide the effect that even if so-called accidental drainage occurs, damage will not be caused to the lower floors of the building T where the horizontal drainage pipe is located. [Explanation of Symbols]

[0037] 10 First joint 20 valves 30 Second joint 50 Valve section 60 1st hollow tube 70 Second hollow tube 80 Hose section 90 Tank section 100 Valve device 200 horizontal drainage pipe 210 Upstream drainage horizontal pipe 211 Downstream end 220 Downstream drainage horizontal pipe 320 New downstream drainage horizontal pipe 500 Second downstream drainage horizontal pipe S1 Drainage horizontal pipe splitting process S2 Valve section installation process S3 Tank installation process S4 Replacement process for the new downstream drainage horizontal pipe S5 Second update drainage horizontal pipe presence determination process T Building

Claims

1. A horizontal drainage pipe, which is arranged to extend laterally, is divided into an upstream horizontal drainage pipe located upstream and a downstream horizontal drainage pipe located downstream, and in order to store the wastewater flowing into the upstream horizontal drainage pipe and replace the downstream horizontal drainage pipe with a new downstream horizontal drainage pipe, a first joint is attached to the downstream end of the upstream horizontal drainage pipe, A valve section comprising an openable and closable valve located downstream of the first joint, and a second joint for attachment to the upstream end of the new downstream drainage horizontal pipe, The valve section includes a second fitting and a hose section that is detachably attached, It has a tank section attached to the hose section for storing wastewater that flows into the upstream horizontal drainage pipe, A valve device that stores wastewater flowing into the upstream horizontal drainage pipe in the tank section via the valve section and the hose section.

2. The valve section comprises a transparent hollow tube between the first fitting and the valve, The valve device according to claim 1, further comprising a transparent hollow tube between the valve and the second fitting.

3. The valve device according to claim 1 or 2, wherein the valve is a ball valve.

4. A drainage pipe division process involves dividing a horizontal drainage pipe, which is arranged to extend laterally, into an upstream drainage pipe located upstream and a downstream drainage pipe located downstream. The valve section installation step involves installing a valve section equipped with a second joint at the downstream end of the upstream drainage horizontal pipe, which is located upstream as a result of the drainage horizontal pipe division step, A tank section installation step involves installing a hose section which is detachably attached to the second fitting in the valve section installed by the valve section installation step, and a tank section which is attached to the hose section and stores the wastewater that flows into the upstream drainage horizontal pipe, A drainage pipe replacement method comprising a new downstream drainage pipe replacement step, in which the downstream drainage pipe located downstream is replaced with a new downstream drainage pipe.

5. The drainage horizontal pipe replacement method according to claim 4, further comprising a transparent hollow pipe between the valve portion and the second joint.

6. The valve section comprises a valve and The drainage horizontal pipe replacement method according to claim 4 or 5, wherein the valve is a ball valve.

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