JP6940430B2 - Block plug with drainage channel and branch pipe drainage method when cleaning sewer pipes using this - Google Patents

Description

The present invention joins the sewer pipe in the cleaning section in the cleaning step of the section where the sewer pipe is appropriately divided in the length direction before lining the rehabilitation pipe made of synthetic resin on the inner wall of the existing sewer pipe which has deteriorated. The present invention relates to an obstruction plug with a drainage channel used for discharging sewage from a branch pipe to the outside of the cleaning section of the sewage pipe, and a drainage method when cleaning the sewage pipe using the plug.

Generally, when a synthetic resin rehabilitation pipe is lined on the inner wall of an existing aging sewer pipe, the inside of the sewer pipe is cleaned in advance for each section of the sewer pipe lining.

Therefore, it is necessary to close the drain port of the drainage basin connected to the upstream of the branch pipe during the cleaning period of the sewer pipe so that the drainage does not flow in from the branch pipe connected to the sewer pipe (for example, patent). Reference 1).

Then, since the wastewater is stored in the drainage basin, it is necessary to periodically suck and collect the wastewater with a vacuum car and transport it to an appropriate treatment facility (for example,). , Patent Document 2).

Japanese Unexamined Patent Publication No. 9-287194 Japanese Unexamined Patent Publication No. 8-296271

Therefore, in the present invention, an obstruction plug with a drainage channel is used, in which the appropriate place in the branch pipe that joins the sewer pipe is filled in a watertight manner and the sewage from the branch pipe is drained to the outside of the cleaning section of the sewer pipe. The purpose is to provide a drainage method when cleaning the existing sewer pipe.

In view of the above problems, the obstruction plug with a drainage channel of the present invention has a rigid drainage conduit having an inflow port at the upper end and an outflow port at the lower end, and can expand and contract freely by the inflow and outflow of air around the drainage conduit. The provided interior bag, the exterior bag that covers the interior bag for expansion regulation and protection, the sleeve that is elastic in the thickness direction around the outer circumference of the exterior bag, and the outlet of the drainage conduit are connected. It is characterized by being composed of a long flexible tube.
Further, it is characterized in that one end opening of a drainage conduit corresponding to one end of an interior bag to which the air hose for air circulation is connected is formed as an inflow port or an outflow port.
Further, the exterior bag is detachably attached to the interior bag, and the sleeve is detachably attached to the exterior bag.
Then, in the branch pipe drainage method at the time of cleaning the sewage pipe according to the present invention, in the cleaning step of the section where the sewage pipe is appropriately divided in the length direction, the sewage from the branch pipe merging with the sewage pipe in the cleaning section is drained. This is a method of discharging water pipes to the outside of the cleaning section, in which air is supplied to the interior bag of the block plug with a drainage channel and the interior bag is expanded together with the exterior bag and sleeve on the outside to block the blockage with a drainage channel. A method for draining a branch pipe at the time of cleaning a sewer pipe, which comprises filling a plug in a suitable place in the branch pipe in a watertight manner and arranging the end port of the flexible pipe outside the cleaning section of the sewer pipe.

In short, the obstruction plug with a drainage channel (hereinafter, also referred to as an obstruction plug) according to the present invention is a sewer pipe before lining a rehabilitation pipe made of synthetic resin on the inner wall of an existing aging sewer pipe as appropriate in the length direction. An interior bag that can be expanded and contracted by the inflow and outflow of air is provided around a rigid drainage conduit with outlets at the upper and lower ends, and the interior bag is expanded. It is wrapped in an outer bag for regulation and protection, a sleeve having elasticity in the thickness direction is wrapped around the outer circumference of the outer bag, and a long flexible tube is connected to the outlet of the drainage conduit, and the flexible tube is connected. Since the end port of the sewage pipe is placed outside the cleaning section of the sewer pipe, air is supplied to the interior bag and the interior bag is inflated together with the exterior bag and sleeve on the outside to increase elasticity in the thickness direction provided on the outer circumference of the exterior bag. Even if the inner surface of the branch pipe is deformed into strain due to adhesion or deposits such as rust bumps, the sleeve has a sleeve that is deformed and crimped according to the shape of the inner surface, so that the appropriate place inside the branch pipe can be filled in a watertight manner without any gaps. As a result, the upstream of the branch pipe and the sewage pipe can be watertightly blocked to prevent the infiltration of sewage from the branch pipe to the sewage pipe, and the sewage can be drained through a series of drainage channels in which drainage conduits and flexible pipes are continuous. It is possible to continuously drain water from the end port to the outside of the cleaning section of the sewer pipe during the cleaning period.
Therefore, it is possible to reduce the labor and cost of pumping the sewage collected in the drainage basin with a vacuum car and transporting it to the treatment facility, which has been required in the past.

Further, when the flexible pipe is attached to the drainage conduit, one end of the drainage conduit corresponding to one end of the interior bag to which the air hose for air flow is connected is formed as an inflow port or an outflow port. The extension direction of the flexible pipe connected to the outlet of the drainage conduit and the air hose can be set in the same direction or in the opposite direction with the obstruction plug with a drainage channel.
As a result, for example, when the obstruction plug is to be filled in the appropriate place in the branch pipe through the confluence with the sewer pipe downstream of the branch pipe, the air hose extends in the same direction as the flexible pipe and is connected to the air pump placed in the appropriate place in the sewer pipe. In addition, when the block plug is to be filled in the appropriate place in the branch pipe through the communication port with the drainage basin upstream of the branch pipe, the air hose extends in the opposite direction to the flexible pipe and goes outdoors through the opening exposed above the ground in the drainage basin. It is convenient because the connection state between the air pump and the block plug (interior bag) can be set as appropriate according to the situation at the site, such as connecting to the air pump placed in.

Since the outer bag is detachably attached to the inner bag, it can be integrated with the inner bag and can follow the expansion and contraction of the inner bag together with the sleeve.
In particular, after the work has been completed, if the outer bag is removed together with the sleeve and a new outer bag is attached to the inner bag, the occlusion plug can be reused and is economical.

Since the sleeve is detachably attached to the outer bag, if the outer bag can be used again after collecting the obstruction plug, remove only the sleeve and attach a new sleeve to the outer bag to attach the obstruction plug. Its practical effect is enormous, such as being reusable and more economical.

It is a front view of the block plug with a drainage channel in an inflated state. It is a vertical sectional view of the same as above. It is an enlarged view of the main part of the same as above. It is a front view which shows the modification of the block plug with a drainage channel. It is a vertical cross-sectional view which shows the other modification of the block plug with a drainage channel. It is an enlarged view of the main part of the same as above. It is a schematic cross-sectional view which shows the state which inserted the block plug with a drainage channel in the state before expansion into a confluence. It is a schematic cross-sectional view which shows the state which filled the confluence with the block plug with a drainage channel. FIG. 5 is a schematic cross-sectional view showing a state in which the merging port is filled with the block plug with a drainage channel of FIG. It is a schematic cross-sectional view which shows the state which filled the communication port with the block plug with a drainage channel of FIG.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
The obstruction plug 1 with a drainage channel (hereinafter referred to as the obstruction plug 1) according to the present invention is before lining a rehabilitation pipe (not shown) made of synthetic resin on the inner wall of an existing large sewage pipe D that has deteriorated. It is used in the cleaning step of the section L in which the sewage pipe D is appropriately divided in the length direction, and the appropriate place in the branch pipe B joining the sewage pipe D is filled in a watertight manner from the branch pipe B. The sewage is discharged to the outside M of the cleaning section L of the sewage pipe D.

The obstruction plug 1 has a rigid drainage pipe 2 having an inflow port 2a at the upper end and an outflow port 2b at the lower end, and an interior bag 3 provided around the drainage pipe 2 so as to be expandable and contractible by the inflow and outflow of air. An exterior bag 4 that covers the interior bag 3 for expansion regulation and protection, and a sleeve 5 made of synthetic rubber such as urethane foam rubber that has elasticity in the thickness direction around the outer circumference of the exterior bag 4. It is mainly composed of a long flexible pipe 6 connected to the outlet 2b of the drainage conduit 2 in a watertight manner, and a series of continuous flow paths of the flexible pipe 6 and the drainage conduit 2 is formed as a drainage channel 1a. ing.

The drainage pipe 2 is made of a relatively lightweight synthetic resin pipe having a predetermined diameter and a predetermined length smaller than that of the branch pipe B and having rigidity such as hard vinyl chloride, and the upper end 2a and the lower end 2b of the drainage pipe 2 are formed. Slightly protrudes upward and downward from the upper and lower ends of the interior bag 3 and the exterior bag 4.

The interior bag 3 is formed by forming a rubber sheet having airtightness and flexibility in a barrel shape. It consists of a portion 3b and a long cylindrical body portion 3c continuous with a large diameter portion of each funnel portion 3b.

Then, a nylon thread 7 having a predetermined diameter is wound around the outer circumference of each cylinder mouth 3a and tightened to form an interior bag 3 whose airtightness is maintained on the outer circumference of the drainage conduit 2.
The cylinder mouth 3a and the drainage conduit 2 are not limited to the above, and the airtightness of the interior bag 3 may be maintained by other means such as adhesion.

Further, one end opening of the drainage pipe 2 corresponding to one end (funnel portion 3b) of the interior bag 3 to which the air hose 8 for air circulation is connected is inserted into the inflow port 2a (see FIG. 4) or the outflow port 2b (FIG. 1). 5), the extension directions of the flexible pipe 6 and the air hose 8 connected to the outlet 2b of the drainage conduit 2 by the obstruction plug 1 of one form can be set in the same direction or in the opposite direction.

That is, in the obstruction plug 1 shown in FIGS. The inner and outer surfaces of the interior bag 3 are airtightly sandwiched by a pair of screwed nuts 9a, which are fixed to the interior bag 3 and are flexible to the base end of the pipe joint 9 protruding outward from the interior bag 3. One end of an air hose 8 having a predetermined length is detachably and airtightly connected, and the air hose 8 forms an outlet 2b at the lower end opening of the drainage conduit 2 corresponding to the lower funnel portion 3b to which the air hose 8 is connected. It extends in the same direction as the flexible pipe 6 connected to the outlet 2b, and the other end of the air hose 8 is connected to an air pump (not shown).

Further, in the modified example of the obstruction plug 1 shown in FIG. 4, the pipe joint 9 is inserted into the funnel portion 3b above the interior bag 3 so that the tip of the pipe joint 9 rushes into the funnel portion 3b, and the pipe joint 9 is inserted into the interior bag 3 in the same manner as described above. One end of the air hose 8 is detachably and airtightly connected to the base end of the pipe joint 9 which is fixed and protrudes outward from the interior bag 3, and the air hose 8 is a drainage conduit corresponding to the upper funnel portion 3b to which the air hose 8 is connected. By forming the upper end opening of 2 with the inflow port 2a, it extends in the direction opposite to the flexible pipe 6 connected to the outflow port 2b on the opposite side of the inflow port 2a, and the other end of the air hose 8 is not shown. It is connected to the pump.

Since the obstruction plug 1 shown in FIG. 4 has the same configuration as the obstruction plug 1 shown in FIGS. The enlarged view of the part is omitted, and the same or corresponding parts as those of the obstruction plug 1 shown in FIGS. 1 to 3 are designated by the same reference numerals.

The outer bag 4 is made of a cloth such as a non-woven fabric containing glass fiber having a large tensile strength and a large coefficient of friction, a low water permeability, and flexibility, and accommodates the interior bag 3 so as to cover it, and is larger than the interior bag 3. A fastener 10 is attached to the base of the tube mouth 4a in the funnel portion 4b which is formed in a barrel shape (the shape is the same as above and therefore the description is omitted) and is continuously provided above and below the cylindrical body portion 4c. It is fitted externally and tied to the drainage conduit 2 via the base of the barrel mouth 3a of the interior bag 3 by crimping the fastener 10.

As a result, the exterior bag 4 regulates excessive expansion of the interior bag 3, maintains its shape when inflated, and protects the interior bag 3 from protrusions and the like that induce damage, rupture, and the like.
A through hole 4d through which the nut 9a can be inserted is formed in the corresponding portion of the pipe joint 9 in the exterior bag 4.

The fastener 10 is a hose band made of stainless steel, and has a band 11 in which diagonally lateral engaging grooves 11a are bored at a predetermined pitch over the entire length direction, and a band 11 having an axis above one end of the band 11. The housing so as to mesh with the cylindrical housing 12 fixed so as to match the direction and the engagement groove 11a on the other end side of the band 11 which is freely inserted and retracted between the housing 12 and one end of the band 11. From a worm gear (not shown) rotatably built into the worm gear 12 and an operation shaft 13 engraved with a cross hole that rotatably protrudes from one end of the worm gear to the outside of the housing 12 and inserts a screwdriver into the tip surface thereof. Become.

Then, by rolling the worm gear in the housing 12 by the rotation of the operation shaft 13, the band 11 (engagement groove 11a) that meshes with the worm gear is advanced and retracted to expand and contract the ring-shaped diameter of the band 11 formed by making a full circle. The outer bag 4 is tied to the drainage conduit 2 via the inner bag 3 by the crimping by the ring-shaped contraction of the band 11, and the drainage conduit 2 is released by the crimping by the ring-shaped diameter expansion of the band 11. It is possible to withdraw from.
The fastener 10 may be a binding band (not shown) made of synthetic resin.

Further, the inner surface of the outer bag 4 and the outer surface of the inner bag 3 are detachably attached via double-sided tape (not shown).
As a result, the outer bag 4 can be integrated with the inner bag 3 so as to follow the expansion and contraction of the inner bag 3 together with the sleeve 5, and when the outer bag 4 is removed, after the crimping by the fastener 10 is released. , It can be achieved by peeling it from the interior bag 3.

The sleeve 5 is detachably attached to the outer bag 4 via a double-sided tape (not shown).
The sleeve 5 has an exterior so that when the obstruction plug 1 arranged at an appropriate position in the branch pipe B is inflated, the branch pipe B is watertightly closed even if the inner surface shape of the branch pipe B is distorted. It is attached to the outer surface of the body 4c of the bag 4.

The flexible tube 6 is made of a long bellows hose made of synthetic resin, the tip port of the bellows hose 6 is fitted onto the outlet 2b, and the hose band or the binding band of the illustrated example is fastened in the same manner as described above. The drainage conduit 2 and the flexible pipe 6 are connected in a watertight manner by externally crimping with the tool 10 to form a drainage channel 1a.

Further, as shown in the illustrated example, the end port 6a of the flexible pipe 6 is fitted with the tip port of a short synthetic resin pipe made of the same material as the drainage conduit 2 and having the same diameter, and the outer periphery thereof is used as a fastener 10. By externally fitting and crimping, the synthetic resin pipe may be integrally connected to form a sturdy structure.

Next, another modified example of the obstruction plug 1 will be described with reference to FIGS. 5 and 6.
This block plug 1 is mainly obtained by changing the mounting position of the air hose 8, and has the same basic structure as the above except for the others. Is omitted.

Specifically, in the pipe wall of the drainage conduit 2 that divides the inside of the interior bag 3 in an airtight manner, the inside of the drainage conduit 2 is airtightly inserted so that the tip of the drainage conduit 2 rushes into the inside of the interior bag 3 below the pipe wall. An L-shaped pipe joint 9 whose base end points toward the outflow port 2b along the inner surface of the drainage conduit 2 is arranged, and one end of the air hose 8 is detachably and airtightly connected to the base end of the pipe joint 9. The other end of the air hose 8 extends outward from the end port 6a through the drainage channel 1a and is connected to an air pump (not shown).

The obstruction plug 1 shown in FIGS. 5 and 6 has an outlet 2b at one end of the drainage conduit 2 corresponding to the connection side of the air hose 8 with the interior bag 3, so that the outlet 2b of the drainage conduit 2 is formed. Although the extension direction of the flexible pipe 6 and the air hose 8 to be connected is set in the same direction, the drainage conduit corresponding to the connection side of the air hose 8 with the interior bag 3 is also shown for this type of obstruction plug 1. By forming the opening at one end of 2 as the inflow port 2a, the extension directions of the flexible pipe 6 and the air hose 8 connected to the outflow port 2b of the drainage conduit 2 can be set in opposite directions (not shown).

In the obstruction plug 1 configured as described above, in the case where the air hose 8 and the flexible pipe 6 extend in the same direction (see FIGS. 1 and 5), a plurality of obstruction plugs 1 mainly join the sewer pipe D of the cleaning section L. It is used for each of the merging ports C with the branch pipe B (see FIG. 10), but is not limited to this, and can be applied to appropriate locations in the branch pipe B.

At the time of this use, the obstruction plug 1 is connected to the air pump arranged at an appropriate position in the sewer pipe D via the air hose 8, but the air is not supplied to the interior bag 3 in the pre-expansion state, and the air is not supplied from the sewer pipe D. With the inflow port 2a facing up, it is pushed up toward the confluence C, and the obstruction plug 1 is inserted and arranged in the confluence C (see FIG. 7, in this illustrated example, the obstruction plug 1 of FIG. 1 is shown as a representative example). ..

Then, air is supplied from the air pump to the inner bag 3 through the air hose 8 and expanded together with the outer outer bag 4 and the sleeve 5.
Then, the sleeve 5 provided on the outer periphery of the outer bag 4 and having elasticity in the thickness direction is deformed according to the inner surface shape even if the inner surface of the branch pipe B is deformed into strain due to adhesion or deposits such as rust bumps. Since it is crimped, the confluence C can be filled in a watertight manner without any gaps (see FIGS. 8 and 9).

The end port 6a of the flexible pipe 6 is located outside the cleaning section L of the sewer pipe D, preferably the outside M on the downstream side of the cleaning section L, either before or after the watertight filling of the merging port C by the obstruction plug 1. Place it in.

Further, in the case where the air hose 8 and the flexible pipe 6 extend in opposite directions (see FIG. 4), the communication port with the drainage basin S upstream of the plurality of branch pipes B mainly merging with the sewer pipe D of the cleaning section L. It is used for each of U (see FIG. 10), but is not limited to this, and can be applied to appropriate locations in the branch pipe B.

At the time of this use, the obstruction plug 1 is connected to an air pump arranged on the ground near the drainage basin S via an air hose 8, and is in a pre-expansion state in which air is not supplied to the interior bag 3, and the flexible pipe 6 The end 6a is inserted from the opening H of the drainage basin S through the inside of the drainage basin S into the communication port U with the drainage basin S, the flexible pipe 6 is fed into and downstream of the branch pipe B, and the end 6a is inserted into the merging port C. Finally, through the inside of the sewage pipe D, it reaches the outside M of the cleaning section L of the sewage pipe D, preferably the outside M on the downstream side of the cleaning section L. 1 is arranged at an appropriate place in the branch pipe B (inside the communication port U in the illustrated example).

Next, air is supplied from the air pump on the ground to the inner bag 3 through the air hose 8 and expanded together with the outer outer bag 4 and the sleeve 5, so that the sleeve 5 having elasticity in the thickness direction provided on the outer periphery of the outer bag 4 is formed. As described above, since the communication port U is deformed and crimped according to the inner surface shape of the branch pipe B, the communication port U can be filled in a watertight manner without any gap (see FIG. 10).

As described above, the upstream side of the branch pipe B is sewage pipe by watertight filling of the appropriate place in the branch pipe B (confluence port C, communication port U in the illustrated example) with various obstruction plugs 1 (see FIGS. 1, 4 and 5). It is watertightly isolated from D to prevent the ingress of sewage from the branch pipe B into the sewage pipe D, and the sewage pipe D is connected to the branch pipe B by a series of drainage channels 1a in which the drainage pipe 2 and the flexible pipe 6 are continuous. The outside M of the cleaning section L of the sewage pipe D communicates with the outside M of the cleaning section L of the sewage pipe D to continue the sewage from the branch pipe B from the terminal port 6a of the flexible pipe 6 arranged in the outside M during the cleaning period. Can be drained.

Then, when the block plug 1 is collected after the work in which the cleaning is completed is completed, the air in the inner bag 3 is sucked and exhausted by the air pump.

At this time, since the exterior bag 4 is integrally attached to the interior bag 3 via double-sided tape, the shrinkage of the interior bag 3 can be followed together with the sleeve 5, so that the interior bag 3 and the like can be used as the drainage conduit 2 as the mandrel. It is contracted, and the obstruction plug 1 can be easily detached from the embedding portion (the confluence port C and the communication port U in the illustrated example) in the branch pipe B.

Then, after collecting the obstruction plug 1, the fasteners 10 used in various places are removed as needed.
That is, by rotating the operation shaft 13 using a screwdriver, the worm gear in the housing 12 is rolled, and the crimping to each part by the fastener 10 is released.

As a result, if the flexible pipe 6 is first separated from the drainage conduit 2, then the outer bag 4 is peeled off from the inner bag 3 together with the double-sided tape, and a new outer bag 4 is attached to the inner bag 3, the obstruction plug 1 can be reused. Is possible.

Further, when the outer bag 4 can be continuously used and the sleeve 5 is discarded, the sleeve 5 may be peeled off from the outer bag 4 together with the double-sided tape, and a new sleeve 5 may be attached to the outer bag 4.

As described above, each disassembled part of the obstruction plug 1 is inspected to confirm whether it can be continuously used or needs to be replaced, and then reassembled and reused.

1 Block plug with drainage channel 2 Drainage conduit
2a inlet
2b Outlet 3 Interior bag 4 Exterior bag 5 Sleeve 6 Flexible pipe
6a Terminal port 8 Air hose B Branch pipe D Sewage pipe L (cleaning) section M Outside

Claims (5)

A block plug with a drainage channel that is detachably provided on a branch pipe connected to a sewer pipe.
A drainage conduit with an inflow port at the upper end and an outflow port at the lower end to allow water to pass through the inside at all times and have rigidity, an interior bag provided around the drainage conduit so as to be able to expand and contract by the inflow and outflow of air, and the interior. An exterior bag that encloses the bag for regulation and protection of expansion, a sleeve that wraps around the outer bag and has elasticity in the thickness direction, and a long flexible pipe that is connected to the outlet of the drainage conduit. An obstruction plug with a drainage channel, which is characterized by consisting of. The obstruction plug with a drainage channel according to claim 1, wherein one end opening of a drainage conduit corresponding to one end of an interior bag to which an air hose for air circulation is connected is formed as an inflow port or an outflow port. The obstruction plug with a drainage channel according to claim 1 or 2, wherein the outer bag is detachably attached to the inner bag. The obstruction plug with a drainage channel according to claim 1, 2 or 3, wherein the sleeve is detachably attached to an outer bag. A drainage method for draining sewage from a branch pipe joining the sewage pipe of the sewage pipe to the outside of the sewage pipe cleaning section in the cleaning step of a section in which the sewage pipe is appropriately divided in the length direction. By supplying air to the internal bag of the sewerage plug according to 2, 3 or 4, and inflating the interior bag together with the outer outer bag and sleeve, the sewerage plug is placed in place in the branch pipe. A branch pipe drainage method at the time of sewage pipe cleaning, which comprises filling the sewage pipe in a watertight manner and arranging the end port of the flexible pipe outside the sewage pipe cleaning section.

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