JP7607273B2 - Odor Control Device - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies [Publication date and place of publication] February 11, 2022: Higashimachi, Iwakura City, Aichi Prefecture; May 10 to 26 days, 2022: Hiromi 1-chome, Kani City, Gifu Prefecture; June 16 to 13 days, 2022: Shimoedo and Imado, Kani City, Gifu Prefecture; July 11 to 6 days, 2022: Kawai, Shimoedo, Hironomioka, and Hasaki, Kani City, Gifu Prefecture; July 25, 2022: Bunkyo 1-chome, Ichinomiya City, Aichi Prefecture; July 28, 2022: Bunkyo 2-chome, Ichinomiya City, Aichi Prefecture [Publisher] LDS Co., Ltd. [Contents of the disclosed invention] LDS Co., Ltd. used the odor suppression device invented by Miyagawa Daisei and Noji Akifumi on the above publication date and at the above publication place.

The present invention relates to an odor suppression device that suppresses the odor of exhaust steam generated by the thermal hardening of a resin rehabilitation material when the resin rehabilitation material is applied to cover the inner surface of an existing pipe.

For example, existing pipes such as sewer systems can deteriorate and develop problems after many years of use.

As a technique for rehabilitating existing pipes through excavation, there is a method in which the inner surface of the existing pipe is covered with a resin rehabilitation material, as shown in Patent Document 1.

The outline of the process for covering the inner surface of an existing pipe with a resin rehabilitation material is as follows:

(1) A process of drawing a resin rehabilitation material, which is made of nonwoven fabric impregnated with thermosetting resin, into an existing pipe. (2) A process of applying water or air pressure to the inside of the resin rehabilitation material to expand the diameter of the resin rehabilitation material. (3) A process of circulating heated steam inside the resin rehabilitation material to harden it.

JP 2019-38128 A

During the process of hardening the resin rehabilitation material, the odor generated by the resin is contained in the exhaust steam.

This odor cannot be released into the air in the surrounding areas where rehabilitation work is taking place, as it would cause odor problems.

Conventionally, measures have been taken to suppress odors contained in exhaust steam using catalysts and activated carbon.

However, the problem with catalysts and activated carbon is that as their odor suppression performance deteriorates over time, it takes time and effort to replace them.

Therefore, in order to solve the above problems, the objective is to provide an odor suppression device that can maintain sufficient odor suppression performance for a long period of time for exhaust steam generated during the process of hardening the resin rehabilitation material in a method of covering the inner surface of an existing pipe with a resin rehabilitation material.

The odor suppression device of claim 1 is an odor suppression device that suppresses the odor of exhaust steam generated by the thermal hardening of a resin rehabilitation material when the resin rehabilitation material is installed to cover the inner surface of an existing pipe, and has a mixing tank that mixes smelly exhaust steam and sub-zero cold air, a cold air tank connected to the mixing tank, stores cold air, and is capable of supplying cold air to the mixing tank, and a cold air generation unit connected to the cold air tank and sends cold air generated from the supplied compressed air to the cold air tank .

The odor of exhaust steam can be reduced by cooling the exhaust steam.

According to the odor suppression device of claim 1, odors can be reliably suppressed by mixing exhaust steam with cold air in a mixing tank and cooling it.

In addition, by storing cold air in the mixing tank, the exhaust steam can be cooled sufficiently to provide sufficient odor suppression performance.

Furthermore, at the construction site of the resin rehabilitation material, there is a power source that generates compressed air, such as a compressor, which is used for expanding the diameter of the resin rehabilitation material before it is thermally hardened. This creates an environment in which compressed air can be supplied from this power source to the cold air generation section. Therefore, the cold air generated in the cold air generation section can be continuously sent to the cold air tank.

By temporarily storing the cold air generated in the cold air generating unit in the cold air tank, it is possible to prevent exhaust steam from flowing back from the mixing tank to the cold air generating unit, even if the volume of cold air sent from the cold air generating unit is small or the pressure of the cold air is low.

The odor suppression device described in claim 1 has the effect of being able to maintain sufficient odor suppression performance of exhaust steam for a long period of time by storing sufficient cold air in the mixing tank and continuously generating cold air in the cold air generating section.

1 is a schematic diagram of a resin rehabilitation material pulling-in process in a method of covering the inner surface of an existing pipe with a resin rehabilitation material. FIG. This is a schematic diagram of the process of expanding the diameter of a resin rehabilitation material in a method of covering the inner surface of an existing pipe with a resin rehabilitation material. 1 is a schematic diagram of a resin rehabilitation material hardening process in a method of covering the inner surface of an existing pipe with a resin rehabilitation material. FIG. FIG. 2 is a schematic diagram showing the state after construction in a method of covering the inner surface of an existing pipe with a resin rehabilitation material. 1 is a schematic perspective view of an odor control device according to one embodiment of the present invention;

One example of a method for covering the inner surface of an existing pipe with a resin rehabilitation material is explained using Figures 1 to 4.

The resin rehabilitation material 10 is a hose made of nonwoven fabric impregnated with thermosetting resin.

In the pulling process shown in FIG. 1, a wire rope 40 is passed through the existing pipe 20, which has been watertightly stopped by a watertight plug 30, to the area where the inner surface of the existing pipe 20 is to be covered with the resin rehabilitation material 10, and the resin rehabilitation material 10 is pulled from the refrigerated vehicle 60 by an electric winch 50.

Next, in the diameter expansion process shown in FIG. 2, a fluid such as water or air is supplied from a fluid supply vehicle 70 to the inside of the resin rehabilitating material 10, and the resin rehabilitating material 10 is expanded in diameter by the pressure of the fluid.

The resin rehabilitation material 10 is expanded in diameter so that it adheres to the inner surface of the existing pipe.

Next, in the hardening process shown in FIG. 3, steam is supplied from the steam supply vehicle 80 through the steam supply pipe 90 into the inside of the resin rehabilitating material 10, thereby heating and hardening the resin rehabilitating material 10.

Next, as shown in FIG. 4, unnecessary portions of the resin rehabilitation material 10 are removed, and the planned area of the inner surface of the existing pipe 20 is covered with the resin rehabilitation material 10.

In the curing process shown in Figure 3, when steam circulates, the exhaust steam returning from inside the resin rehabilitating material 10 to the steam supply truck 80 carries the odor of the resin rehabilitating material 10.

An odor suppression device 1 according to one embodiment of the present invention is used as a device for suppressing the odor of exhaust steam generated during this curing process.

The odor suppression device 1 has a mixing tank 2, a cold air tank 3, and a cold air generating unit 4.

The mixing tank 2 is connected to an exhaust steam pipe 5 through which smelly exhaust steam returns.

The mixing tank 2 and the cold air tank 3 are also connected by a cold air supply pipe 6.

The cold air generating unit 4 is connected to the cold air tank 3.

In addition, a compressed air pipe 7 is connected to the cold air generating unit 4 to supply compressed air.

The cold air generator 4 generates cold air from the supplied compressed air and sends it to the cold air tank 3.

The cold air tank 3 can temporarily store the cold air sent from the cold air generating unit 4.

In mixing tank 2, the smelly exhaust steam is mixed with the cold air supplied from the cold air tank.

When the exhaust steam is mixed with cold air, its temperature drops, suppressing odors.

Although one example of a method for covering the inner surface of an existing pipe with a resin rehabilitation material has been described above, the use of the odor suppression device of the present invention is not limited to that example. If it is necessary to cool odorous exhaust steam, the odor suppression device of the present invention can also be used in another example of a method for covering the inner surface of an existing pipe with a resin rehabilitation material.

In the above embodiment, the mixing tank 2 and the cold air tank 3 are connected by the cold air supply pipe 6, but this is not limited to the above. The mixing tank 2 and the cold air tank 3 may be connected via a means for increasing the flow rate of cold air from the cold air tank to the mixing tank.

Reference Signs List 1 Odor suppression device 2 Mixing tank 3 Cold air tank 4 Cold air generation unit 5 Exhaust steam pipe 6 Cold air supply pipe 7 Compressed air pipe 10 Resin rehabilitation material 20 Existing pipe 30 Water stop plug 40 Wire rope 50 Electric winch 60 Refrigerated vehicle 70 Fluid supply vehicle 80 Steam supply vehicle 90 Steam supply pipe

Claims (1)

An odor suppression device that suppresses the odor of exhaust steam generated by thermal hardening of a resin rehabilitation material in the construction of a resin rehabilitation material that covers the inner circumferential surface of an existing pipe,
a mixing tank for mixing the smelly exhaust steam with sub-zero cold air;
a cold air tank connected to the mixing tank, storing cold air, and capable of supplying cold air to the mixing tank;
and a cold air generating unit connected to the cold air tank for generating cold air from supplied compressed air and sending the cold air to the cold air tank .

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