KR102601528B1 - Nozzle device and method for street inlet of removing adulteration and odor elimination using the same - Google Patents

Abstract

The present invention includes a first nozzle connected to a washing water supply unit; a second nozzle symmetrically connected to the first nozzle to form a nozzle structure; and a support bar attachable and detachable to the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit. It provides a nozzle device including.

Description

Nozzle device and method of removing impurities and odor from rainwater gutter using the same {NOZZLE DEVICE AND METHOD FOR STREET INLET OF REMOVING ADULTERATION AND ODOR ELIMINATION USING THE SAME}

The present invention relates to a nozzle device and a method for removing rainwater contaminants and odor using the same.

Typically, rainwater gutters are installed at approximately 10 to 30 m intervals along the roadside. Rainwater drains are equipped with pipes that connect to nearby sewer pipes or rivers. For maintenance purposes, it is desirable for the internal angle of the longitudinal cross-sectional arrangement to be 120 degrees or more, and an inspection hole larger than the diameter of the connector pipe should be installed at bends, etc. where the extension of the horizontal arrangement of the connector is more than 20 m. The connection pipe is formed to slope downward from the rainwater drain to the sewer pipe to allow for natural drainage.

A rainwater gutter is a facility that is used only when it rains and is rarely used in normal times. In addition, during rainy seasons such as the rainy season, soil, leaves, or household waste accumulated on the side of the road or in alleys may flow in all at once with rainwater, clogging the connecting pipe, or the vomit flowing in with the rainwater may accumulate in the connecting pipe little by little, clogging the connecting pipe. there is.

The vomit that flows in with rainwater is mixed in a variety of ways, from large particles to fine particles, so small particles are filled between large particles, and as they are slowly dried in the cool underground, they can harden very hard. .

If the pipe connecting the rainwater drain and the sewer pipe becomes clogged, rainwater cannot drain smoothly, which may cause flooding damage to the surrounding area. Therefore, rainwater drains and connecting pipes must be inspected and cleaned periodically, and maintenance is required to prevent the connecting pipes from being blocked by contaminants such as vomit.

However, the conventional method of maintaining the rainwater gutter connector uses only high-pressure water without a detergent to clean the connector, and there is no separate procedure to remove odor. Instead, the high-pressure water hose is directly connected to the sprinkler device of the high-pressure suction dredger, thereby providing high-pressure water. Only water for water spray was supplied, and high-pressure water was sprayed using front and rear spray nozzles with a diameter of about 10 to 20 mm to remove contaminants. The connection pipe was cleaned by reciprocating the nozzle inside the connection pipe, and the nozzle was cleaned. There was a problem where position control was difficult.

In contrast, the present invention connects a negative pressure ejector capable of injecting a cleaning agent and an EM (Effective Microorganisms) agent to the hose of a dredge, and a nozzle device consisting of a dual nozzle connected to the negative pressure ejector and provided with a support is used to connect the inside of the connector. We would like to propose a mechanism that can effectively remove contaminants and odors from the connecting pipe while reciprocating.

Republic of Korea Patent Publication No. 10-2065939 (announced on January 14, 2020)

In order to solve the above-described problem, the present invention connects a negative pressure ejector capable of injecting a cleaning agent and an EM agent to the hose of a dredge, and a nozzle device consisting of a dual nozzle connected to the negative pressure ejector and provided with a support is installed inside the connector. The aim is to provide a nozzle device that can effectively remove contaminants and odors from the connection pipe while reciprocating, and a method for removing contaminants and odors from a rainwater gutter using the same.

In order to achieve the above-described object, the present invention includes: a first nozzle connected to a washing water supply unit; a second nozzle symmetrically connected to the first nozzle to form a nozzle structure; and a support bar attachable and detachable to the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit. It provides a nozzle device including.

In addition, the first nozzle has a first injection pipe configured radially along the outer circumference of the first flow path connected to the washing water supply unit inside.

In addition, the second nozzle is provided with a second flow path connected to the first flow path inside, and a second injection pipe is formed radially along the outer circumference of the second flow path.

In addition, the support includes a body portion detachable to the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit; a leg portion extending from the outer periphery of the body portion toward the inner periphery of the connector; and a guide roller rotatably provided at the end of the leg and movable in contact with the inside of the connector. Includes.

Additionally, the body portion is a band.

In addition, when the leg part enters or retreats into the interior of the connection pipe, the guide roller touches the inside of the connection pipe and is tilted around the connection portion with the body portion.

Additionally, the leg portion is elastically supported by an elastic support device.

In addition, the elastic support device includes a first coupling part detachable to the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit; a second coupling portion detachable from the leg portion; A bellows cover, one end of which is connected to the first coupling part and the other end of which is connected to the second coupling part, and which can be expanded and contracted in conjunction with the operation of the leg portion; And an elastic member inside the bellows cover, one end of which is connected to the first coupling part and the other end of which is connected to the second coupling part; Includes.

In addition, the support includes a body portion detachable to the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit; and two or more pairs of guide rollers along the outer circumference of the body. Includes.

The present invention includes the steps of connecting a washing water supply unit to one side of a negative pressure ejector; Injecting the nozzle device connected to the negative pressure ejector into the connector pipe; Supplying washing water from the washing water supply unit to the negative pressure ejector and injecting washing liquid into the negative pressure ejector; and spraying a spray liquid consisting of a mixture of washing water and washing liquid from the negative pressure ejector into the inside of the connection pipe through the nozzle device, while at the same time causing the nozzle device to reciprocate inside the connection pipe. Provides a method for removing rainwater contaminants and odors using a nozzle device including a.

Additionally, the nozzle device is connected to the negative pressure ejector by the washing water supply unit connected to the other side of the negative pressure ejector.

Additionally, the washing liquid is a detergent or EM.

In addition, the negative pressure ejector includes a main body into which the washing water and the washing liquid are introduced and mixed; and a cleaning liquid input unit provided at the upper part of the main body. Includes.

In addition, the main body part includes a first main body part connected to the washing water supply part and whose width becomes narrower in the direction of movement of the washing water; a second body part connected to the first main body part and having a width that widens in the direction in which the injection liquid moves from the first main body part; and a cross-sectional reduction portion provided between the first body and the second body, where washing water and washing liquid are mixed. Includes.

In addition, the washing water supply part is a hose, the washing water supply part connected to one side of the negative pressure ejector is connected to a washing water tank mounted on a dredge, the connection pipe is located between a rainwater gutter and a sewer main pipe, and the sewage main pipe is It has a larger inner diameter than the connector.

The present invention connects a negative pressure ejector capable of injecting a cleaning agent or EM agent to the hose of a dredging vehicle, and sprays high-pressure washing water into the inside of the connection pipe through the negative pressure ejector, thereby effectively cleaning impurities and bad odors in the connection pipe.

In addition, according to the present invention, a nozzle device consisting of a dual nozzle provided with a support can effectively remove contaminants and bad odors from the connecting pipe while reciprocating inside the connecting pipe.

1 is a diagram showing a nozzle device according to an embodiment of the present invention.
Figure 2 is a diagram showing the operation of the support when the nozzle device enters or retreats inside the connector according to an embodiment of the present invention.
Figure 3 is a diagram showing the operation of an elastic support device that elastically supports a support when a nozzle device enters or retreats inside a connection pipe according to another embodiment of the present invention.
Figure 4 is a diagram showing a support according to another embodiment of the present invention.
Figure 5 is a diagram showing a method for removing contaminants and bad odors from a rainwater gutter using a nozzle device according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. First, when adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or restricted thereto, and of course, it can be modified and implemented in various ways by those skilled in the art.

Figure 1 is a diagram showing a nozzle device according to an embodiment of the present invention, and Figure 2 is a diagram showing the operation of the support when the nozzle device according to an embodiment of the present invention enters or retreats inside the connector.

As shown in Figure 1, the nozzle device of the present invention includes a nozzle structure 100 of a double nozzle in which the first nozzle 110 and the second nozzle 120 form a symmetrical structure, and the outer periphery or washing water supply part of the nozzle structure 100. Includes a detachable support (1) on the outer periphery of (300).

Specifically, the first nozzle 110 may be connected to the washing water supply unit 300 for supplying washing water. The washing water supply unit 300 may be a hose.

The first nozzle 110 is provided with a first flow path 111 connected to the washing water supply unit 300 therein. The first nozzle 110 is provided with a first injection pipe 112 along the outer circumference of the first passage 111. The first injection pipe 112 is configured to be inclined and can spray the injection liquid L over a wide area. The first injection pipe 112 may be configured radially along the outer circumference of the first flow path 111. The end of the first injection pipe 112 may be exposed to the outside of the first nozzle 110 so that the injection liquid L can be sprayed outward.

The second nozzle 120 may be symmetrically connected to the first nozzle 110 to form the nozzle structure 100. When the second nozzle 120 enters the connector 500, it enters before the first nozzle 110.

The second nozzle 120 is provided with a second flow path 121 connected to the washing water supply unit 300 therein. The second flow path 121 is connected to the first flow path 111. The second nozzle 120 is provided with a second injection pipe 122 along the outer circumference of the second flow path 121. The second injection pipe 122 is configured to be inclined in the opposite direction of the first injection pipe 112 and can spray the injection liquid L over a wide area. The second injection pipe 122 may be configured radially along the outer circumference of the second flow path 121. The end of the second injection pipe 122 may be exposed to the outside of the second nozzle 120 so that the injection liquid L can be sprayed outward.

In this way, the injection liquid (L) can be sprayed over a large area through the first injection pipe 112 of the first nozzle 110 and the second injection pipe 122 of the second nozzle 120, so the connection pipe ( 500) Internal contaminants can be effectively removed.

The support 130 may be configured to be detachable from the outer periphery of the nozzle structure 100 or the outer periphery of the washing water supply unit 300. The support 130 ensures that the nozzle structure 100 is in a non-contact state with the inside of the connection pipe 500, so that the injection liquid (L) is easily sprayed from the first nozzle 110 and the second nozzle 120. can do.

The support 130 includes a body portion 131, a leg portion 132 provided on the outer periphery of the body portion 131, and a guide roller 133 provided at an end of the leg portion 132.

The body portion 131 may be configured to be attachable to or detachable from the outer periphery of the nozzle structure 100 or the outer periphery of the washing water supply unit 300. For example, the body portion 131 may be a metal band that surrounds the outer circumference of the nozzle structure 100 or the outer circumference of the washing water supply unit 300 and connects both ends with a coupling member such as a bolt or nut.

The leg portion 132 extends from the outer periphery of the body portion 131 toward the inner periphery of the connection pipe 500. The leg portion 132 is preferably configured to be longer than the inner diameter of the connecting pipe 500 so that it can be used regardless of the inner diameter of the connecting pipe 500.

The guide roller 133 may be rotatably provided at the end of the leg portion 132. The guide roller 133 may guide the stable movement of the nozzle structure 100 by contacting the inside of the connector 500.

Although not shown in detail in the drawings, the connection portion 134 of the leg portion 132 and the body portion 131 may be connected by a hinge shaft.

As shown in (a) of FIG. 2, the leg portion 132 may be caught on the connector 500 and tilted in a direction opposite to the entry direction with the connection portion 134 as the center. When the nozzle structure 100 enters the inside of the connection pipe 500, the guide roller 133 touches the inside of the connection pipe 500 and rolls to induce stable movement of the nozzle structure 100.

As shown in (b) of FIG. 2, when the leg portion 132 moves to the sewer main pipe 600, which has a larger inner diameter than the connection pipe 500, it is unfolded and then retreats to the connection pipe 500, the connection pipe ( 500), it may be tilted in a direction opposite to the retreat direction around the connection portion 134. When the nozzle structure 100 retracts, the guide roller 133 touches the inside of the connector 500 and rolls, thereby leading to stable movement of the nozzle structure 100.

Figure 3 is a diagram showing a support device according to another embodiment of the present invention.

As shown in FIG. 3, the leg portion 132 may be elastically supported by the elastic support device 140.

The elastic support device 140 includes a first coupling portion 141 detachable to the outer circumference of the nozzle structure 100 or the outer circumference of the washing water supply unit 300, a second coupling portion 142 detachable to the leg portion 132, and both ends. It includes a bellows cover 143 connected to the first coupling portion 141 and the second coupling portion 142, and an elastic member 144 provided inside the bellows cover 143.

For example, the first coupling portion 141 and the second coupling portion 142 may be a band that surrounds the outer circumference of the coupling object and connects both ends with coupling members such as bolts and nuts.

The bellows cover 143 can prevent impurities from getting on the elastic member 144 by surrounding the elastic member 144 provided therein. For example, if the elastic member 144 is dirty, the elastic member 144 may not operate smoothly. However, the nozzle device of the present invention can solve this problem by using the bellows cover 143 surrounding the elastic member 144.

The bellows cover 143 is composed of a corrugated pipe structure and can be extended or shortened in length in conjunction with the operation of the leg portion 132. One end of the bellows cover 143 may be connected to the first coupling portion 141 and the other end may be connected to the second coupling portion 142.

The elastic member 144 has one end connected to the first coupling portion 141 and the other end connected to the second coupling portion 142 inside the bellows cover 143. For example, the elastic member 144 may be a spring. The leg portion 132 can be elastically supported by the elastic member 144.

As shown in (a) of FIG. 3, when the leg portion 132 enters the interior of the connector 500 and the leg portion 132 is tilted in the direction opposite to entry, the elastic support device 140 is reduced and the leg portion 132 ) is elastically supported so that the guide roller 133 is in close contact with the inside of the connector 500. This allows the guide roller 133 to move smoothly along the inside of the connector 500.

As shown in (b) of FIG. 3, when the nozzle structure 100 moves to the sewer main pipe 600 larger than the inner diameter of the connection pipe 500 and retreats into the connection pipe 500, the leg portion 132 opposes the retreat. When tilted in this direction, the elastic support device 140 expands to elastically support the leg portion 132 so that the guide roller 133 comes into close contact with the inside of the connector 500. This allows the guide roller 133 to move smoothly along the inside of the connector 500.

Figure 4 is a diagram showing a support according to another embodiment of the present invention.

As shown in FIG. 4, the support 130 includes a body 131 and a guide roller 133 provided on the body 131. The body portion 131 may be configured to be attachable to or detachable from the outer periphery of the nozzle structure 100 or the outer periphery of the washing water supply unit 300. Guide rollers 133 may be provided in two or more pairs along the outer circumference of the body portion 131. For example, the guide roller 133 may be configured in the form of inline skates or carrier wheels. The guide roller 133 helps the nozzle structure 100 move and prevents the nozzle structure 100 from contacting the inside of the connector 500.

Figure 5 is a diagram showing a method for removing contaminants and bad odors from a rainwater gutter using a nozzle device according to a preferred embodiment of the present invention.

As shown in Figure 5, the method of removing contaminants and bad odors from a rainwater gutter using the nozzle device of the present invention can remove contaminants and bad odors from the connection pipe using the nozzle device described in Figures 1 to 4.

The washing water supply unit 300 is connected to one side of the negative pressure ejector 200. For example, the washing water supply unit 300 is a hose. The washing water supply unit 300 connected to one side of the negative pressure ejector 200 is connected to the washing water tank mounted on the dredge vehicle (V).

The nozzle device connected to the negative pressure ejector 200 is introduced into the connector 500.

Washing water is supplied from the washing water supply unit 300 to the negative pressure ejector 200, and washing liquid is injected into the negative pressure ejector 200.

The cleaning solution may be a detergent or EM (Effective Microorganisms). Any detergent that is suitable for removing contaminants can be used. For example, the detergent may be any one selected from citric acid, malic acid, oxalic acid, reducing agent, nonionic surfactant, and lactic acid, or a composition containing these. For example, the detergent may be any one selected from malic acid, citric acid, and sodium gluconate, or a composition containing these.

The negative pressure ejector 200 injects the spray liquid (L), which is a mixture of washing water and washing liquid, into the connection pipe 500 through a nozzle device.

The nozzle device may be connected to the negative pressure ejector 200 by the washing water supply unit 300 connected to the other side of the negative pressure ejector 200.

The negative pressure ejector 200 includes a main body 210 into which washing water and washing liquid are injected and mixed, and a washing liquid inlet 220 provided on the upper part of the main body 210.

The main body 210 is provided with a first main body 211, a second main body 212 connected to the first main body 211, and between the first main body 211 and the second main body 212. It includes a cross-section reduction portion 213.

The first main body 211 is connected to the washing water supply unit 300 and has a structure whose width becomes narrower in the direction of movement of the washing water.

The second body 212 is connected to the first body 211 and has a structure in which the width of the first body 211 increases in the direction in which the injection liquid L moves.

The cross-sectional reduction portion 213 is provided between the first body portion 211 and the second body portion 212 and mixes the washing water and the washing liquid.

The high-pressure washing water supplied from the washing water supply unit 300 into the first body unit 211 flows into the cross-section reduction unit 213 while sucking the washing liquid introduced into the washing liquid inlet unit 220. Washing water and washing liquid are mixed in the cross-section reduction section 213. The injection liquid L, which is a mixture of washing water and washing liquid, may be ejected while moving to the second body portion 212 whose cross-section is enlarged.

The principle of sucking the washing liquid is that when the washing water flows into the cross-section reduction part 213, the speed increases and the rear pressure decreases, thereby generating negative pressure, which causes the washing liquid to be sucked in.

When the washing water is supplied to the first main body 211 and passes through the cross-section reduction part 213, the speed increases and the pressure decreases, and when it passes through the second main body 212 with an enlarged cross-section, the speed decreases and the pressure increases. .

The connection pipe 500 is located between the rainwater gutter 400 and the sewer main pipe 600. For example, the connection pipe 500 may be configured to have an inclined structure that inclines toward the sewer main pipe 600 to enable natural drainage. The sewer main pipe 600 may be configured with a larger inner diameter than the connecting pipe.

The nozzle device inserted into the connection pipe 500 can effectively remove the object 501, such as contaminants, inside the connection pipe 500 by spraying the spray liquid L in both directions of entry and retreat.

As such, the present invention can maximize the cleaning and odor removal effects of the connection pipe 500 by using a nozzle device with a double nozzle structure, a negative pressure ejector 200, and a cleaning solution such as EM.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: nozzle structure 110: first nozzle
111: first flow path 112: first injection pipe
120: second nozzle 121: second flow path
122: second injection pipe 130: support
131: body part 132: leg part
133: Guide roller 134: Connection part
140: elastic support device 141: first coupling portion
142: second coupling portion 143: bellows cover
144: elastic member 200: negative pressure ejector
210: main body 211: first main body
212: second main body 213: cross-sectional reduction part
220: Washing liquid input unit 300: Washing water supply unit
400: Rainwater gutter 500: Connector
501: Target for removal 600: Sewage main pipe
L: Spray liquid V: Dredging vehicle

Claims (15)

A first nozzle connected to the washing water supply unit;
a second nozzle symmetrically connected to the first nozzle to form a nozzle structure; and
A support bar detachable from the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit;
Including,
The support is,
a body portion detachable to the outer circumference of the nozzle structure or the outer circumference of the washing water supply unit;
a leg portion extending from the outer periphery of the body portion toward the inner periphery of the connector; and
A guide roller rotatably provided at the end of the leg and movable in contact with the inside of the connector;
Includes,
The legs,
It is elastically supported by an elastic support device connecting the leg portion and the washing water supply portion, and when moving along the inside of the connector in the entry direction, it is caught by the connector and rotates around the connection portion of the body portion and the leg portion to support the elastic support. As the device is compressed, it tilts in the direction opposite to the entry direction, and when moving to a sewer main pipe with a larger inner diameter than the connection pipe, it is stretched to its original state by the extension of the compressed elastic support device and then moves in a retreating direction along the inside of the connection pipe. When hooked on the connector, it rotates around the connection portion and tilts in the direction opposite to the direction of retreat,
The elastic support device is,
A first coupling part attachable and detachable to the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit;
a second coupling portion detachable from the leg portion;
A bellows cover, one end of which is connected to the first coupling part and the other end of which is connected to the second coupling part, and which can be expanded and contracted in conjunction with the operation of the leg portion; and
An elastic member inside the bellows cover, one end of which is connected to the first coupling part and the other end of which is connected to the second coupling part;
A nozzle device including. According to claim 1,
The first nozzle is,
A nozzle device characterized in that the first injection pipe is configured radially along the outer circumference of the first flow path internally connected to the washing water supply unit. According to claim 2,
The second nozzle is,
A nozzle device characterized in that a second flow path connected to the first flow path is provided inside, and a second injection pipe is configured radially along the outer circumference of the second flow path. delete According to claim 1,
The body part,
A nozzle device characterized in that it is a band. delete delete delete According to claim 1,
The support is,
a body portion detachable to the outer circumference of the nozzle structure or the outer circumference of the washing water supply unit; and
Guide rollers provided in two or more pairs along the outer periphery of the body portion;
A nozzle device including. Connecting the washing water supply unit to one side of the negative pressure ejector;
Injecting the nozzle device connected to the negative pressure ejector into the connector pipe;
Supplying washing water from the washing water supply unit to the negative pressure ejector and injecting washing liquid into the negative pressure ejector; and
Spraying a spray liquid consisting of a mixture of washing water and washing liquid from the negative pressure ejector into the inside of the connection pipe through the nozzle device and simultaneously causing the nozzle device to reciprocate inside the connection pipe;
Including,
The nozzle device,
A first nozzle connected to the washing water supply unit;
a second nozzle symmetrically connected to the first nozzle to form a nozzle structure; and
A support bar detachable from the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit;
Including,
The support is,
a body portion detachable to the outer circumference of the nozzle structure or the outer circumference of the washing water supply unit;
a leg portion extending from the outer periphery of the body portion toward the inner periphery of the connector; and
A guide roller rotatably provided at the end of the leg and movable in contact with the inside of the connector;
Includes,
The legs,
It is elastically supported by an elastic support device connecting the leg portion and the washing water supply portion, and when moving along the inside of the connector in the entry direction, it is caught by the connector and rotates around the connection portion of the body portion and the leg portion to support the elastic support. As the device is compressed, it tilts in the direction opposite to the entry direction, and when moving to a sewer main pipe with a larger inner diameter than the connecting pipe, it is stretched to its original state by the extension of the compressed elastic support device and then moves in a retreating direction along the inside of the connecting pipe. When hooked on the connector, it rotates around the connection portion and tilts in the direction opposite to the direction of retreat,
The elastic support device is,
A first coupling part attachable and detachable to the outer periphery of the nozzle structure or the outer periphery of the washing water supply unit;
a second coupling portion detachable from the leg portion;
A bellows cover, one end of which is connected to the first coupling part and the other end of which is connected to the second coupling part, and which can be expanded and contracted in conjunction with the operation of the leg portion; and
An elastic member inside the bellows cover, one end of which is connected to the first coupling part and the other end of which is connected to the second coupling part;
A method of removing impurities and odor from a rainwater gutter using a nozzle device including. According to claim 10,
The nozzle device,
A method of removing contaminants and odors from a rain gutter using a nozzle device, characterized in that it is connected to the negative pressure ejector by the washing water supply unit connected to the other side of the negative pressure ejector. According to claim 10,
The washing liquid is,
A method of removing contaminants and odors from a rainwater drain using a nozzle device characterized as a detergent or EM. According to claim 12,
The negative pressure ejector,
a main body into which the washing water and the washing liquid are introduced and mixed; and
a cleaning liquid input unit provided at the upper part of the main body;
A method of removing impurities and odor from a rainwater gutter using a nozzle device including. According to claim 13,
The main body part,
a first body portion connected to the washing water supply unit and whose width becomes narrower in the direction of movement of the washing water;
a second body part connected to the first main body part and having a width that widens in the direction in which the injection liquid moves from the first main body part; and
a cross-sectional reduction portion provided between the first body and the second body, where washing water and washing liquid are mixed;
A method of removing impurities and odor from a rainwater gutter using a nozzle device including. According to claim 10,
The washing water supply part is a hose, the washing water supply part connected to one side of the negative pressure ejector is connected to a washing water tank mounted on a dredging vehicle, the connection pipe is located between the rainwater gutter and the sewage main pipe, and the sewage main pipe is connected to the above connection. A method of removing contaminants and odors from a rainwater drain using a nozzle device characterized by having an inner diameter larger than that of a pipe.

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