JP2020026618A - Piping structure and protection means used therefor - Google Patents

Abstract

To provide a piping structure having a part needing maintenance work allowing remarkable improvement of maintenance work efficiency by easily exposing the part to the outside.SOLUTION: A piping structure 1 is formed to be freely and selectively changeable in a state between a service state α surrounding an indirect water discharge joint 10 due to extension of a bellows pipe 30 and a maintenance state β exposing a part of the indirect water discharge joint 10 due to shrinking of the bellows pipe 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a piping structure mainly having a part requiring maintenance and a drainage path including the part being covered by a protection means, and a protection means used for the piping structure.

  Conventionally, for example, it is used in a drainage path for discharging drainage such as drainage of equipment such as a water heater, in which drainage flows backward from a drainage pipe section on the downstream side and adversely affects the equipment such as failure. An indirect drainage structure for preventing the occurrence of a drainage is already well known (for example, see Patent Documents 1 and 2).

  Further, for example, in a cold region, in order to prevent the drainage flowing through the drainage pipe from freezing, a long cylindrical protection member having a heat retaining function is attached to the drainage pipe, or a sheet-like protection member is attached to the drainage pipe. It is also common to wrap it around a tube.

JP 2011-162947 A JP 2016 211166 A

  However, for example, in the above-described indirect drainage structure, there is a problem in that if the above-described protection member or the like is attached so as to be in close contact with the pipeline, the indirect drainage cannot be performed properly. In addition, it is necessary to appropriately perform maintenance work in order to properly perform indirect drainage, and it is necessary to remove the protection member from the pipe every time the maintenance work is performed. was there. In addition, such a problem is not limited to the indirect drainage structure, but is a problem that the entire piping structure having a maintenance target member that requires periodic maintenance work is present.

  The present invention has been made in view of such a situation, and has as its object to provide a piping structure in which the efficiency of maintenance work is dramatically improved.

  Further, the present invention provides a protection means which is used in a piping structure having a part requiring a maintenance work, and which can easily expose the part to the outside to dramatically improve the efficiency of the maintenance work. With the goal.

  Another object of the present invention is to provide a protection means capable of appropriately preventing the drainage flowing in the piping structure from freezing.

  In the present invention, a maintenance target member requiring maintenance work is interposed in a pipe structure in which drainage flows from upstream to downstream, and the maintenance target member, an upstream drain pipe portion located upstream of the maintenance target member. And a downstream drainage pipe portion located downstream of the maintenance target member, a piping structure provided with a protection means surrounding a required portion, and between the maintenance target member and the protection means. A use state in which a gap is formed and the protection unit surrounds the maintenance target member, and a maintenance state in which at least a part of the maintenance target member is exposed by moving at least a part of the protection unit. And a state where the state can be selectively changed in each state.

  Here, in the use state, which is a normal state, the maintenance target member is surrounded by the protection means, so that the protection of the piping structure by the protection means is appropriately performed. Then, when performing the maintenance work, at least a part of the protection means is moved to expose the maintenance target member. In addition, the member to be maintained includes a free-flowing means such as a joint for indirect drainage, a valve, and the like. By forming a gap between the member to be maintained and the protection means, drainage such as backflow water is performed. Can be properly performed, and it is possible to prevent a movable part such as a valve from moving unintentionally. Note that moving at least a part of the protection means means that at least a part of the protection means moves to another position different from a normal position. Further, the upstream drain pipe section and the downstream drain pipe section do not need to be always exposed to the outside air. For example, the upstream drain pipe section may be located in a device such as a water heater.

  Here, in addition to the above-described configuration, the protection unit includes a maintenance target member surrounding protection pipe portion surrounding the maintenance target member, and the maintenance target member surrounding protection pipe portion is disposed in a downward flow direction of drainage in the maintenance target member. The use state is a state in which the maintenance target member surrounding protective tube portion is extended to surround the maintenance target member, and the maintenance state is the maintenance target member. There is proposed a configuration in which the surrounding protective tube is contracted so that at least a part of the maintenance target member is exposed.

  With this configuration, it is possible to change the state of the protection unit between the use state and the maintenance state only by the operation of expanding and contracting the maintenance target member surrounding protection tube. For this reason, the efficiency of maintenance work is dramatically improved. In this configuration, since it is not necessary to perform an operation of expanding and contracting a portion of the protection means other than the maintenance target member surrounding protection tube portion, for example, the portion may be a robust structure. is there.

  Further, instead of the above-described configuration, the protection unit may be arranged such that the protection unit is adjacent to the maintenance target member surrounding protection tube portion surrounding the maintenance target member and the maintenance target member surrounding protection tube portion. Drain pipe section surrounding protective pipe section, wherein the drain pipe section surrounding protective pipe section is detachably attached to a surrounding drain pipe section, and the use state is the drain pipe section surrounding The protection pipe portion is in a state adjacent to the maintenance target member surrounding protection pipe portion, and the maintenance state is such that the drainage pipe portion surrounding protection pipe portion is removed from the surrounding drainage pipe portion, and the maintenance target member is A configuration in which at least a part of the maintenance target member is exposed by the surrounding protective tube moving in a direction in which the removed drainage tube surrounding protective tube is located. It proposed.

  With this configuration, the efficiency of maintenance work can be dramatically improved. In the present configuration, the whole of the maintenance target member surrounding protection tube portion can be a robust structure.

  Further, in addition to the above-described configurations, the member to be maintained is an indirect drainage joint for indirectly draining drainage flowing from an upstream drainage pipe toward a downstream drainage pipe. The gap formed between the drainage joint and the protection means is a backflow water gap through which drainage flowing from the inside of the indirect drainage joint to the outside can flow, and the use state is such that the protection means is A state surrounding the joint for indirect drainage, wherein the maintenance state is such that at least a part of the protection means moves along a pipe axis of the joint for indirect drainage and at least a part of the joint for indirect drainage. A configuration that is partially exposed is proposed.

  In such a configuration, since a water channel for drainage discharged from the joint for indirect drainage to the outside is secured, the function of the joint for indirect drainage can be reliably exhibited.

  Further, a configuration is proposed in which a waterproof layer having a waterproof function is formed on at least a part of the inner peripheral surface facing the joint for indirect drainage in the protection means.

  With this configuration, even if the backflow water is discharged from the joint for indirect drainage, it is possible to prevent the protection unit from being flooded with water. As the waterproof layer, a waterproof sheet may be provided on the inner peripheral surface of the protective means, or the protective means itself may be composed of a material having a waterproof function. In addition, it is preferable that the waterproof layer is disposed particularly below the joint for indirect drainage.

  Further, the present invention is a protection means used for the piping structure, wherein the protection means has a heat retaining function of preventing at least freezing of the member to be maintained.

  In such a configuration, it is possible to appropriately prevent the drainage flowing in the piping structure from freezing.

  The piping structure of the present invention has the effect of dramatically improving the efficiency of maintenance work.

  Further, the protection means of the present invention has an effect that the freezing of the drainage flowing in the piping structure can be appropriately prevented.

FIG. 3 is an explanatory diagram illustrating a piping structure in which the protection unit according to the first embodiment is in use. FIG. 4 is an explanatory diagram illustrating a piping structure in which the protection unit according to the first embodiment is in a maintenance state. FIG. 10 is an explanatory diagram illustrating a piping structure in which a protection unit according to a second embodiment is in use. FIG. 10 is an explanatory diagram illustrating a piping structure in which a protection unit according to the second embodiment is in a maintenance state.

  An embodiment in which the piping structure and the protection means of the present invention are used in a drainage path for draining drainage such as a drain of a water heater will be described in detail. The present invention is not limited to the embodiments described below, and design changes can be made as appropriate.

[Example 1]
As shown in FIG. 1, the joint 10 for indirect drainage as a member to be maintained is disposed between a device 70 such as a water heater disposed on the upstream side and a drain main line 75 disposed on the downstream side. used. Specifically, the downstream end of the upstream drainage pipe 71 that discharges drainage such as drainage of equipment 70 (hereinafter referred to as drainage drainage) is connected to the indirect drainage joint 10, and the drainage main pipe 75 is also connected to the drainage main pipe 75. The upstream end of the downstream drain pipe portion 73 communicating with the basin 74 connected to the basin 74 is connected. The joint 10 for indirect drainage has a function of indirectly draining drainage or the like flowing from the upstream toward the drain main pipe 75.

The joint 10 for indirect drainage will be described in more detail.
The joint 10 for indirect drainage is formed of a cylindrical body through which drainage flows, and a water passage portion 11 formed of a through hole communicating between the inside and the outside is formed in a cylindrical wall of the joint 10 for indirect drainage. That is, the drainage water or the like that has flowed into the joint 10 for indirect drainage from the upstream drain pipe section 71 flows down to the downstream drain pipe section 73 during normal times. On the other hand, when the wastewater flows backward from the downstream side, it is possible to prevent the backflow water from being discharged to the outside through the water passage section 11 and prevent the wastewater that has flown back to reach the device 70 and damage the device 70. .

  The joint 10 for indirect drainage is provided with a check valve (not shown) so that corrosive gas and the like do not flow backward from the drainage main pipe 75 through the downstream drainage pipe 73 even in the normal state. The check valve needs to be replaced periodically and is detachably attached to the joint 10 for indirect drainage.

Next, the main part of the present invention will be described.
In this embodiment, for the purpose of preventing freezing, the downstream drain pipe surrounding member 20 is attached to a portion of the downstream drain pipe 73 exposed above the ground. Specifically, the downstream drainage pipe surrounding member 20 is formed of a rigid sheath 21 made of a hard plastic material and a heat retaining cover 22, and surrounds the outer periphery of the downstream drainage pipe 73. A tube 21 is mounted, and a heat insulating cover 22 having a heat insulating function is mounted on the outer periphery of the sheath 21.

  A cylindrical bellows pipe 30 is attached directly above the downstream drain pipe surrounding member 20 so as to be able to expand and contract in the direction in which drain such as drain flows (in this embodiment, the vertical direction). Further, a packing 31 is detachably attached to the upper end of the bellows tube 30, and the bellows tube 30 is fixed to the joint 10 for indirect drainage in an extended state by the packing 31. The state in which the bellows pipe 30 extends and the bellows pipe 30 surrounds the joint 10 for indirect drainage is referred to as a use state α.

  Here, in the use state α, a gap is formed between the bellows pipe 30 and the joint 10 for indirect drainage, and the gap forms the gap S for backflow water. With this configuration, the indirect drainage function of the indirect drainage joint 10 is appropriately secured. Further, since the backwater gap S is formed, even if the indirect drainage joint 10 overflows, the overflow water can be appropriately discharged to the backwater gap S.

  On the other hand, when performing the maintenance work of the joint 10 for indirect drainage, as shown in FIG. 2, the packing 31 is first removed, and then the upper part of the bellows tube 30 is pushed down to lower a part of the bellows tube 30 downward. Move to As a result, the entire bellows tube 30 is contracted, and the joint 10 for indirect drainage is exposed to the outside, so that a maintenance state β in which maintenance work can be performed.

  The bellows tube 30 constitutes the maintenance target member surrounding protection tube portion according to the present invention. Further, the downstream drainage pipe surrounding member 20 and the bellows pipe 30 constitute the protection means in the present invention. Further, the piping structure according to the present invention is configured by the piping structure 1 including the device 70, the upstream drain pipe 71, the joint 10 for indirect drainage, the downstream drain pipe 73, the square 74, and the drain main pipe 75. .

  By the way, in consideration of the case where the backflow water may be discharged from the joint 10 for indirect drainage, the surface of the inner peripheral surface of the bellows pipe 30 or the downstream side drain pipe surrounding member 20 is provided with a waterproof having a waterproof function. A configuration in which a layer is formed is desirable. Specifically, a means in which the bellows pipe 30 and the downstream drain pipe surrounding member 20 are made of a waterproof material can be adopted.

[Example 2]
The piping structure of the second embodiment will be described with reference to FIGS. Components having the same configuration as in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 3, a long maintenance target member surrounding protection pipe 40 is attached to the joint 10 for indirect drainage and the portion of the downstream drain pipe 73 exposed above the ground. Here, the maintenance target member surrounding protective pipe portion 40 is provided on the outer sheath of the sheath tube 41 and the sheath tube 41 surrounding the joint 10 for indirect drainage and the portion of the downstream drain tube portion 73 exposed above the ground. And a heat insulating cover 42 having a heat insulating function. Then, by installing the packing 43, the upper ends of the sheath pipe 41 and the heat retaining cover 42 are fixed to the upstream drain pipe 71.

  In addition, a gap S for backflow water is formed between the maintenance target member surrounding protection tube portion 40 and the joint 10 for indirect drainage.

  Further, immediately above the packing 43, a drain pipe surrounding protective pipe 50 surrounding the upstream drain pipe 71 is detachably attached to the upstream drain pipe 71.

  Here, in the use state α shown in FIG. 3, the drain pipe surrounding protection pipe section 50 is disposed adjacent to and above the maintenance target member surrounding protection pipe section 40 to prevent freezing. .

  Then, when performing the maintenance work of the joint 10 for indirect drainage, as shown in FIG. 4, the drainage pipe surrounding protection pipe part 50 is once removed, and the maintenance target member surrounding protection pipe part 40 is moved toward the empty space. To the upstream drain pipe 71 side. With this configuration, the joint 10 for indirect drainage is exposed to the outside, and the maintenance state β is set. In addition, the maintenance target member surrounding protection tube part 40 may be formed of a cylindrical body made of a robust material.

  Here, the protection means in the present invention is configured by the maintenance target member surrounding protection tube portion 40 and the drainage tube surrounding protection tube portion 50. The piping structure of the present invention is constituted by the piping structure 2 including the device 70, the upstream drain pipe 71, the joint 10 for indirect drainage, the downstream drain pipe 73, the square 74, and the drain main pipe 75.

  The size and shape of each part in the first and second embodiments can be freely selected as appropriate. In addition, for example, the sheath tubes 21 and 41 and the heat retaining covers 22 and 42 can suitably use a conventionally known configuration. The member to be maintained according to the present invention is not limited to the joint 10 for indirect drainage, but may be a check valve, a valve, or the like.

  Further, in the first embodiment, for example, a protection pipe section surrounding the upstream drain pipe section 71 may be separately provided. Further, the downstream drain pipe surrounding member 20 may be in close contact with the downstream drain pipe 73. Further, a configuration may be adopted in which the bellows tube 30 is pressed and shrunk toward the upstream side to enter the maintenance state β.

  In the second embodiment, the length of the drain pipe surrounding protection pipe section 50 may be such that maintenance work can be performed on the joint 10 for indirect drainage in the maintenance state β. May be fixedly provided. Further, the maintenance target member surrounding protection tube portion 40 may be moved toward the downstream side to enter the maintenance state β.

1, 2 Piping structure 10 Joint for indirect drainage (maintenance target member)
20 Downstream drain pipe surrounding member (protection means)
30 bellows tube (maintenance member surrounding protection tube part)
40 Maintenance target member surrounding protection tube (protection means)
50 Drainage pipe surrounding protection pipe (protection means)
71 Upstream drainage pipe section 73 Downstream drainage pipe section S Gap for backflow water (gap)
α Usage status β Maintenance status

Claims (6)

In the piping structure in which drainage flows from upstream to downstream, a maintenance target member that requires maintenance work is interposed, and the maintenance target member, an upstream drain pipe portion located upstream of the maintenance target member, and the maintenance A piping structure provided with a protection means surrounding a required portion in a downstream drain pipe portion located downstream of the target member,
A gap is formed between the maintenance target member and the protection unit,
A use state in which the protection means surrounds the maintenance target member,
A maintenance state in which at least a part of the maintenance target member is exposed by moving at least a part of the protection unit,
Characterized in that the state can be selectively changed in each state. The protection means includes a maintenance target member surrounding protection tube portion surrounding the maintenance target member,
The maintenance target member surrounding protection tube portion is formed of a tubular member that can be stretched and contracted in a direction along a downflow direction of drainage in the maintenance target member,
The use state is a state in which the maintenance target member surrounding protection tube portion is extended to surround the maintenance target member,
The piping structure according to claim 1, wherein the maintenance state is a state in which the maintenance target member surrounding protection tube portion is contracted to expose at least a part of the maintenance target member. The protection means,
A maintenance target member surrounding protection tube portion surrounding the maintenance target member,
A drain pipe surrounding protective tube disposed adjacent to the maintenance target member surrounding protective tube,
With
The drain pipe surrounding protection pipe is detachable from the surrounding drain pipe,
The use state is a state in which the drainage pipe surrounding protection pipe section is adjacent to the maintenance target member surrounding protection pipe section,
In the maintenance state, the drain pipe surrounding protective pipe is removed from the drain pipe surrounding the drain pipe, and the drain pipe surrounding protective pipe is removed from the maintenance target member surrounding protective pipe. 2. The piping structure according to claim 1, wherein at least a part of the maintenance target member is exposed by moving in the direction of the inclination. The member to be maintained is an indirect drainage joint for indirectly draining drainage flowing from an upstream drainage pipe toward a downstream drainage pipe,
The gap formed between the indirect drainage joint and the protection means is a backflow water gap through which drainage flowing from the inside of the indirect drainage joint to the outside can flow,
The use state is a state in which the protection means surrounds the joint for indirect drainage,
The maintenance state is a state in which at least a part of the protection means moves along a pipe axis of the joint for indirect drainage and exposes at least a part of the joint for indirect drainage. 4. The piping structure according to any one of 3. The piping structure according to claim 4, wherein a waterproof layer having a waterproof function is formed on at least a part of a surface of an inner peripheral surface facing the joint for indirect drainage in the protection means. It is protection means used for the piping structure according to any one of claims 1 to 5,
Protecting means having a heat retaining function of at least preventing freezing of the maintenance target member.

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