JP4915496B2 - Cleaning aid in drain pipe cleaning device - Google Patents

Description

  The present invention relates to a cleaning aid used in a cleaning device for removing deposits on the inner peripheral surface of a drain pipe in an apartment building such as an office building or a condominium.

Conventionally, the drain pipe gradually adheres and accumulates organic substances, oils and fats, etc. due to use over time, and the inside becomes constricted. If left as it is, the deposit progresses and remains in the drain pipe. The part that could pass water (drainage channel) was completely clogged, or the drainage pipe itself was corroded, and due to the progress of corrosion, the drainage pipe was perforated and leaked. The deposit was periodically peeled and removed, and then a lining treatment was performed to form a protective coating with a suitable thickness on the inner surface of the drain pipe.
As the peeling removal treatment of the above-mentioned deposits applied before this lining treatment, as disclosed in Patent Document 1, the cleaning method of removing the deposits on the inner peripheral surface by an abrasive that is air-conveyed in the drain pipe (So-called blasting method).
However, the above-mentioned cleaning method is inefficient because most of the abrasive material passes through the central portion of the drain pipe and does not collide with the deposit on the inner peripheral surface of the drain pipe. I could not do it.
In order to solve the above problems, as disclosed in Patent Document 2, a cleaning method has been developed in which an impeller that rotates by the force of a fluid passing through a drain pipe and an abrasive are used in combination.
In this method, the abrasive is made to collide with the impeller rotating in the drain pipe, so that the abrasive is randomly blown off and collides with the deposits on the inner peripheral surface of the drain pipe, and is attached to the impeller with an abrasive blade attached to the impeller. Remove the kimono.

JP-A-11-310953 Japanese Patent No. 3321153

  However, in general, drainage pipes that have been used for a long period of time have accumulated so much deposits that the effective space in which drainage can actually flow, that is, the diameter of the drainage channel, has become extremely thin. However, no matter how much suction from the downstream side of the drain pipe, the force applied to the impeller is insufficient due to insufficient fluid suction, and the rotational force is low, so the deposit cannot be scraped efficiently, and the blade is deep in the deposit. If it bites in, the rotation of the impeller stops and there is a problem that the deposit cannot be removed.

  In the present invention, an abrasive charging machine and a suction device are connected to the upstream end and the downstream end of the drain pipe, respectively, and the negative pressure in the drain pipe by the suction apparatus is sucked and conveyed from the abrasive charging machine into the drain pipe. In the drainage pipe cleaning device, the cleaning aid is introduced into the drainage pipe together with the polishing material, and the cleaning aid is connected to the fluid pressure feeding device via a flexible fluid flow pipe and is polished in the drainage pipe. Rotation that is not affected by the conveying airflow of abrasive material by comprising a drive unit with an impeller that rotates by fluid pressure in a casing isolated from the material conveying airflow and a rotating abrasive tool connected to the axle of the impeller The above-mentioned problem is solved by securing a conveyance route for the pressure fluid that is a power source of the polishing tool and independently driving the rotary polishing tool.

In short, according to the present invention, it is possible to secure the conveyance route of the pressure fluid, which is the power source of the rotary polishing tool, by the fluid circulation pipe and the casing so as not to be affected by the abrasive air current generated in the drain pipe by the suction device. Thus, the pressure fluid pumped from the fluid pumping device through the fluid flow pipe into the casing rotates the impeller in the casing without being influenced by the carrier airflow, and is connected to the axle of the impeller. Therefore, the rotary polishing tool can maintain a desired rotational force, and the rotational force can scrape off deposits on the inner peripheral surface of the drain pipe without difficulty.
Therefore, even if the deposit is thickly formed on the inner peripheral surface of the drain pipe and the effective space in the drain pipe is small, even if the suction force of the suction device is insufficient and the impact force against the deposit by the abrasive is weak, Since the effective space can be expanded by grinding the deposits and the suction amount can be increased, the impact force of the abrasive also increases with the progress of the rotary polishing tool in the drain pipe, and a sufficient blasting effect can be exerted, so that the inside of the drain pipe can be efficiently Its practical effects such as being able to be cleaned are enormous.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic view showing a drain pipe cleaning device, and FIG. 2 is an enlarged view showing an example of a usage state of a cleaning aid according to the present invention.
As shown in FIG. 1, the drainage pipe MP passes through each level in an apartment, etc., and branches horizontally extending branch pipes SP extending from the drainage pipe MP in the left-right direction for each level. A branch pipe TP connected to a drain outlet of a water place (kitchen, washroom, etc.) is branched.
And in installing the below-mentioned cleaning device in the drain pipe MP, the upper part of the drain pipe MP above the connecting portion with the uppermost horizontal branch pipe SP, the lowermost horizontal branch pipe SP, Cut each of the lower parts than the connecting part.
Hereinafter, in the drain pipe MP, the upper and lower cut portions are referred to as an upstream end portion PU and a downstream end portion PL.

  The cleaning device includes an abrasive charging machine 1 connected to the upstream end PU of the drain pipe MP, a suction device 2 connected to the downstream end PL of the drain pipe MP, and a negative pressure in the drain pipe MP by the suction apparatus 2. It is mainly composed of the cleaning aid 3 that is put into the drain pipe MP together with the abrasive G that is sucked into the drain pipe MP from the abrasive feeding machine 1.

As shown in FIGS. 3 and 4, the abrasive charging machine 1 is provided with a funnel-shaped abrasive accommodating portion 5 in a rectangular tube-shaped outer case 4.
The discharge port 6 for the abrasive G provided at the lower end of the abrasive container 5 connects the one end side of the discharge pipe 7 orthogonally, and the other end side of the discharge pipe 7 projects through the outer case 4 and is placed at the appropriate place on the other end side. The base end of the connection hose 8 is connected, and the tip of the connection hose 8 is connected to the connection port of the closing cover 9 covered with the upstream end PU of the drain pipe MP, whereby the abrasive container 5 and the drain pipe MP are connected. Are communicated with each other via a discharge pipe 7 and a connection hose 8.
Further, the other end of the discharge pipe 7 is branched so as to be close to the connection portion with the connection hose 8 so that the air introduction pipe 10 stands upright, and a suction force is applied to the upper end opening of the air introduction pipe 10. A suction air amount adjusting means (not shown) equipped with a pressure gauge for measurement is detachably mounted.
Further, the other end of the discharge pipe 7 is provided with a cleaning water supply port 11 connected to a cleaning water supply device (not shown). The supply port 11 is not used when the cleaning water is introduced into the drain pipe MP described later. It is normally sealed, but it can be opened and used as an air inlet other than during cleaning. In that case, the upper end opening of the empty inlet tube 10 is closed, and the amount of air sucked into the supply port 11 Wear the adjustment means.
For the abrasive G, the type and grain size of the abrasive grains are appropriately selected according to the diameter, material and other conditions of the drain pipe MP.

  The suction device 2 is a suction (vacuum) pump, and is connected to the downstream end PU of the drain pipe MP via a pressure hose 12 so as to suck air in the drain pipe MP by its operation.

The cleaning auxiliary tool 3 is connected to the fluid pumping device 13 via a flexible fluid flow pipe 14 and rotated at a fluid pressure in a casing 15 that is isolated from the conveying air current of the abrasive G generated in the drain pipe MP. It is mainly composed of a drive unit 17 in which an impeller 16 is mounted and a rotary polishing tool 19 connected to an axle 18 of the impeller 16.
The fluid pumping device 13 is an air compressor when the fluid to be pumped is air, and is a pump when the fluid is liquid such as water.
The fluid circulation pipe 14 is inserted into the closing cover 9 at the upstream end PU of the drain pipe MP, and the cleaning auxiliary tool 3 at the tip thereof is disposed in the drain pipe MP, and the cleaning auxiliary tool 3 is connected to the fluid circulation pipe 14. By adjusting the feed length, operations such as movement in the drain pipe MP and stationary at an arbitrary position are performed.

As shown in FIGS. 5 and 6, the casing 15 of the drive unit 17 is made of a metal having rigidity and is formed in a cylindrical shape closed at both ends in a watertight manner, and is one end of the casing 15 (upper end in the illustrated example). A plug 20 to be inserted into a socket 14a provided at the tip of the fluid circulation pipe 14 is projected at the center of the part, and an annular joint 18a for connection with the rotary polishing tool 19 is provided at the center of the other end. A plurality of pressure fluid discharge ports 21 are provided at appropriate locations around the center except for the center.
Inside the casing 15, one end side and the other end side are partitioned into a pressure chamber 22 and an impeller housing chamber 23 in a watertight manner via a partition wall 24, respectively.
The pressure chamber 22 communicates with the plug 20 so that the pressure fluid pumped from the fluid pumping device 13 is introduced by the connection between the casing 15 and the fluid circulation pipe 14.
The impeller 16 accommodated in the impeller accommodating chamber 23 has a plurality of blades 25 formed by bending a rectangular plate with a predetermined curvature radially projecting from the axle 18, and the base end of the axle 18 is recessed in the center of the partition wall 24. The front end side of the axle 18 passes through a substantially spherical collar 27 and is rotatably inserted and supported in the insertion hole at the center of the other end portion of the casing 15.
The partition wall 24 is provided with small diameter communication holes 28 between the pressure chamber 22 and the impeller housing chamber 23 on the circumference of a predetermined radius at equal intervals as the blades 25, and at the side of the impeller housing chamber 23 in the communication hole 28. A fluid ejection nozzle 29 that projects from the opening is directed to each pressure receiving surface 25a of each blade 25.

The rotary polishing tool 19 is a polishing wheel in which a grinding polishing portion 31 made of a metal fan-shaped cutting blade is disposed in a propeller shape around a circular base 30 as shown in FIGS. An example of this is a circular brush with a grinding / polishing part 31 made of a large number of wires such as piano wire and stainless steel wire on the peripheral surface of such a cylindrical base 30. If it is the structure which scrapes off the deposit | attachment X, it is not limited to the thing of the example of illustration.
Then, an inverted U-shaped latching portion 32 is erected at the center of the base 30 of the rotary polishing tool 19, and a coupling support 33 consisting of a chain of a predetermined length is coupled to the latching portion 32, At the tip of the connection support 33, a fastener 34 connected to the annular joint 18a of the axle 18 by a bolt and a nut is provided.
In this embodiment, the rotary polishing tool 19 is shown as connected to the axle 18 via the connection support 33. However, the hook 32 of the rotary polishing tool 19 is directly connected to the annular joint 18a of the axle 18. You may do it.

The cleaning process of the drain pipe MP by the cleaning device having the above configuration will be described.
First, the upper part and the lower part of the drain pipe MP are cut as described above, and the drain outlets of all the drain branches TP communicating with the drain pipe MP are closed.
Next, the suction device 2 is connected to the downstream end PL of the drainage pipe MP via the pressure hose 12, the suction device 2 is operated, air is circulated inside the drainage pipe MP, and the inner peripheral surface of the drainage pipe MP is The deposit X is dried, and the suction device 2 is temporarily stopped after drying.
Then, the upstream end PU of the drainage pipe MP is covered with the closing cover 9 and the tip of the connection hose 8 is connected to the closure cover 9, whereby the upstream end PU of the drainage pipe MP is connected via the connection hose 8. Connect the abrasive charging machine 1.
In addition, a driving unit 17 connected with a suitable rotary polishing tool 19 is connected to the tip of a fluid circulation pipe 14 extending from the fluid pressure feeding device 13, and the fluid circulation pipe 14 is inserted into the closing cover 9 so that the cleaning auxiliary tool 3 (drive) The part 17 and the rotating polishing tool 19) are arranged at the upstream end PU in the drain pipe MP.

Next, the suction device 2 and the fluid pressure feeding device 13 are operated.
When the suction device 2 is activated, outside air is sucked and pressed into the drain pipe MP from the air introduction pipe 10 through the discharge pipe 7 and the connection hose 8, and the abrasive material is accommodated from the discharge port 6 that leads to the discharge pipe 7 by the suction air flow generated thereby. The abrasive G in the section 5 is sucked and conveyed into the drain pipe MP.
The abrasive G is dispersed in the drain pipe MP in the process of being transported from the upstream to the downstream by the high-speed airflow generated in the drain pipe MP, and is blown away at a high speed in a random direction. Grind. In FIG. 2, the abrasive G is omitted.
In addition, when the fluid pumping device 13 is operated, the pressure fluid flowing from the fluid injection pipes 29 into the pressure chambers 22 in the casing 15 in the driving unit 17 through the fluid circulation pipes 14 is received by the blades 25 of the impeller 16 from the fluid jet nozzles 29. The impeller 16 is sprayed toward the surface 25a, whereby the impeller 16 rotates at a high speed, and the rotational force is transmitted from the axle 18 to the rotary polishing tool 19, and the surrounding deposits by the grinding and polishing portion 31 of the rotating rotary polishing tool 19 X is scraped off.
Then, the deposit X is sequentially scraped from the upstream side by gradually feeding the fluid circulation pipe 14 into the drain pipe MP and slowly moving the rotary polishing tool 19 to the downstream side.

As described above, the deposit X is efficiently removed by the polishing by the collision of the abrasive G and the grinding and polishing by the rotary polishing tool 19.
Since the rotary polishing tool 19 is driven by a dedicated power source (pressure fluid pumped by the fluid pumping device 13) without being affected by the air flow of the abrasive G, it is attached to the inner peripheral surface of the drain pipe MP. Even if the kimono X is formed thick and the effective space in the drain pipe MP is small, even if the suction force of the suction device 2 is insufficient and the impact force against the deposit X by the abrasive G is weak, the attachment by the rotary polishing tool 19 Since the effective space can be expanded by grinding the kimono X and the suction amount can be increased, the collision force of the abrasive G is also increased with the progress of the rotary polishing tool 19 in the drain pipe MP.

When the cleaning auxiliary tool 3 reaches the downstream end PL of the drain pipe MP, the abrasive G is used up, and the removal of the deposit X is completed, the suction device 2 and the fluid pumping device 13 are stopped, and the fluid The flow pipe 14 is pulled back and the cleaning aid 3 is recovered from the upstream end PU of the drain pipe MP.
The removed deposit X and the abrasive G on the inner peripheral surface of the drainage pipe MP are stored in a storage tank (not shown) of the suction device 2 through the pressure hose 12.
Next, when the cleaning water supply device is connected to the supply port 11 and the suction device 2 is operated, the cleaning water discharged from the cleaning water supply device is discharged from the discharge pipe 7 into the drain pipe MP through the connection hose 8. The polished inner peripheral surface of the drain pipe MP is washed by the high-speed air flow generated by the suction force of the suction device 2 through suction, and the washed suspension water is stored in the storage tank of the suction device 2 through the pressure hose 12. Is done.

  During the cleaning process, the rotary polishing tool 19 may be repeatedly moved to remove the deposit X from the upstream side to the downstream side of the drain pipe MP. In this case, the rotary polishing tool 19 having a different form is used. The degree of polishing may be changed, for example, rough polishing, medium polishing, finish polishing, etc., and the drainage pipe MP has a rotating polishing tool when the deposit X is formed thick on the inner peripheral surface thereof. In order to avoid this, a large load is applied to the grinding / polishing part 31 of the 19 so that the effective space is gradually expanded by scraping the deposit X little by little. You may select and use anything.

It is the schematic which shows the cleaning apparatus of a drain pipe. It is an enlarged view which shows an example of the use condition of the cleaning auxiliary tool which concerns on this invention. It is a top view of an abrasive charging machine. It is a longitudinal cross-sectional view of FIG. It is a longitudinal cross-sectional view which shows the inside of a drive part. It is AA sectional drawing of FIG. It is a front view which shows an example of a rotary polishing tool. It is BB sectional drawing of FIG. It is a front view which shows the other example of a rotary polishing tool. FIG. 10 is a cross-sectional view taken along the line CC in FIG. 9.

Explanation of symbols

1 Abrasive Filling Machine 2 Suction Device 3 Cleaning Aid
13 Fluid pressure feeder
14 Fluid distribution pipe
15 casing
16 impeller
17 Drive unit
18 axles
19 Rotary polishing tool G Abrasive material MP Drain pipe PU Upstream end PL Downstream end

Claims (2)

Along with the abrasive that is sucked and transported from the abrasive thrower into the drain pipe by connecting the abrasive thrower to the upstream end of the drain pipe and a suction device at the downstream end, and the negative pressure in the drain pipe by the suction device In a drain pipe cleaning device in which a cleaning auxiliary tool is put into the drain pipe, the cleaning auxiliary tool is connected to the fluid pressure feeding device via a flexible fluid flow pipe, and the carrier airflow generated in the drain pipe A pressure chamber that introduces a pressure fluid from a fluid circulation pipe into the casing, and an impeller housing chamber that is equipped with an impeller that is rotated by the fluid pressure, in the axial direction of the axle of the impeller A plurality of communication holes that are arranged in parallel with a partition wall and communicate with the pressure chamber and the impeller housing chamber are arranged circumferentially around the axle center of the impeller, and from the communication hole in the axial direction of the axle. Impeller with jet of fluid Arranged a drive unit for rotating the grinding and polishing part made of a metal fan cutting blade on the outer circumference of the axle freely swingably linked disc-shaped base via a connecting support the lower end of the impeller propeller cleaning aid in the cleaning apparatus of the drain pipe, characterized in that it consists of a rotary grinding tool formed by.   By providing the same number of communication holes as the impeller blades and projecting a fluid injection nozzle at the opening of the communication hole on the impeller housing chamber side, the pressure fluid is jetted toward the pressure receiving surface of each blade. The cleaning aid according to claim 1.

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