KR102538590B1 - Water push type pig assembly and pipe cleaning method using the same - Google Patents

Abstract

A water jet push-type pig assembly and a pipe cleaning method using the same are disclosed.
The water jet push-type pig assembly according to one aspect of the present invention is a pig assembly that scratches and removes the scale attached to the inner surface of the conduit while moving in one direction along the inside of the conduit, by entering the conduit in advance of the conduit. A body whose inner and outer surfaces are in elastic contact; It is connected to the jet water supply pipe inside the body to form an internal passage through which jet water is supplied, and a plurality of nozzle holes branching outward from the internal passage to inject jet water toward the inner surface of the conduit are provided to follow the inside of the conduit. Entering water jet nozzle body; and a connection transmission body which transmits an external force by making surface contact between the rear end of the pig body and the front end of the water jet nozzle body while connecting the rear end of the pig body. Including, while the jets injected from the plurality of nozzle holes hit the inner surface of the conduit, an external force that pushes the pig body through the connection transmission body is generated, and the outer surface of the pig body forcedly moved by the external force and the It is possible to generate a friction force to scrape off the scale between the inner surface of the conduit.

Description

Water jet push type pig assembly and pipe cleaning method using the same {Water push type pig assembly and pipe cleaning method using the same }

The present invention relates to a pig assembly that is pushed forward and propelled by a water jet and a method for cleaning a pipe line using the same, and more particularly, to a pig assembly that moves the inside of a pipe by jet water discharged at high pressure from a water jet nozzle body. It relates to a water jet push-type pig assembly that can scratch and remove scale attached to the inside of the pipe while passing through without clogging and reduce the total amount of water used when the pig body is moved and a pipe cleaning method using the same.

In general, when pipes such as water and sewage pipes, vacuum waste collection pipes, and oil and gas pipes are used for a long time, the inner surface of the pipes is oxidized and corrosion occurs, and the water passing capacity due to scale is reduced, while sediments are accumulated and fixed on the inner walls of the pipes. As a result, it becomes impossible to exert 100% of its function as a conduit.

In particular, in the case of conduits such as water supply pipes, deterioration of water quality and corrosion of water pipes due to the chemical action of the water body due to chlorine used as a tap water disinfectant and the interaction between the water body and the surface of the conduit accelerate the deterioration of the water supply network.

The interior of these conduits is not only mineral deposits formed over time, but also biofilms and sediments from the inflow of other foreign substances, which cause water pollution. Therefore, the water supply network is periodically managed to secure tap water safety and relieve public anxiety related to water quality. As one way to do this, a customs process of cleaning the inside of the pipe is performed to maintain the water supply pipe network.

Sediment, foreign matter, and scale contaminate the fluid, develop odors and bacterial growth, and may adversely affect health when leaked to the outside.

Accordingly, as a method of cleaning the inside of a conventional conduit, various methods are disclosed, such as a cleaning method using high-pressure water, a cleaning method using a pig, and a cleaning method using a scraper.

Among these various cleaning methods, the pig cleaning method is to wash the inside of a conduit, which is a water supply pipe, using a poly pig, such as a pig coated with epoxy paint on urethane foam or urethane foam.

However, the known pig cleaning method is a method of washing the inside of the conduit while propelling the pig forward by forcibly supplying high-pressure pumped water to the rear of the pig entering the conduit, and cleaning the inside of the conduit. The scale attached to the inside of the conduit is removed and cleaned by the frictional force generated while the inner surface and the outer surface of the pig come into contact with each other.

In this washing process, the amount of water such as pumped water that is forcibly supplied to the inside of the conduit increases to obtain a driving force for moving the pig along the inside of the conduit, and the amount of water used as pumped water is proportional to the size of the inner diameter of the conduit. It has a lot of downsides.

In addition, in the method of cleaning the inside of the conduit using only the water jet method using high-pressure water, the nozzle spraying the water jet high-pressure water moves straight forward smoothly without jamming in the straight section, and the cleaning process can be performed. In the curved section formed in , there was a fatal problem that it was impossible to proceed through the curved section because it was only a straight movement.

In addition, it is difficult to completely remove the scale, such as iron oxide, which is firmly adhered to the inner surface of the aged conduit by the high-pressure water jet sprayed from the nozzle, and only the scale or biofilm lightly attached to the inside of the conduit is removed singly, thereby repeating two or more times. It was accompanied by customs cleaning and acted as a major cause of deterioration in cleaning efficiency and work productivity.

(Patent Document 1) KR10-1886572 B1

(Patent Document 2) KR10-2344736 B1

The present invention is to solve the above problems, an object of the present invention is to increase the removal efficiency of the scale adhered to the inner surface of the conduit while the pig body passes through the inside of the conduit without clogging by water jet water, It is intended to provide a water jet push-type pig assembly that can reduce the total amount of high-pressure water used to move a pig body that removes scale by external contact and a pipe cleaning method using the same.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

According to one aspect of the present invention, in the pig assembly for scraping and removing the scale attached to the inner surface of the conduit while moving in one direction along the inside of the conduit, it enters the inside of the conduit in advance so that the inner and outer surfaces of the conduit are elastic. Pig bodies that are in contact with; It is connected to the jet water supply pipe inside the body to form an internal passage through which jet water is supplied, and a plurality of nozzle holes branching outward from the internal passage to inject jet water toward the inner surface of the conduit are provided to follow the inside of the conduit. Entering water jet nozzle body; and a connection transmission body which transmits an external force by making surface contact between the rear end of the pig body and the front end of the water jet nozzle body while connecting the rear end of the pig body. Including, while the jets injected from the plurality of nozzle holes hit the inner surface of the conduit, an external force that pushes the pig body through the connection transmission body is generated, and the outer surface of the pig body forcedly moved by the external force and the It includes a water jet push-type pig assembly that generates a frictional force to scrape off the scale between the inner surface of the conduit.

At this time, the pig body includes a cylindrical body in which the inner surface and the outer surface of the conduit are in elastic contact, and a protrusion of a cone end surface formed so that the outer diameter gradually decreases at the tip of the cylindrical body, so that the tip of the connection transmission body is the cylindrical body. It may be made of an integral resin structure provided by being inserted corresponding to the.

At this time, the connection transmission body includes a first contact plate fixedly installed to be exposed on the rear surface of the pig body corresponding to the water jet nozzle, and a first contact plate provided at the front end of the water jet nozzle corresponding to the pig body to face the first contact plate. It may include 2 contact plates.

In this case, the first contact plate may be inserted and disposed inside the body of the pig body and provided integrally with or replaceably provided at an end of the insert facing the water jet nozzle.

In this case, the insert may be formed of a hollow pipe member, and the first contact plate may be provided at an end of an insertion bar inserted into an open end of the hollow pipe member facing the water jet nozzle body.

At this time, the insert may be made of a hollow pipe member and installed at least one position tracking sensor in the internal space.

At this time, the second contact plate may be integrally provided at the front end of the water jet nozzle facing the pig body or may be assembled to be replaceable.

At this time, the connection transmission body includes a positioning protrusion protruding from the outer surface of one of the first contact plate and the second contact plate, and is recessed so that the positioning protrusion is inserted into the other contact plate correspondingly. It may include a groove for positioning.

At this time, the connection transmission body includes a conical groove or a truncated cone groove recessed on the outer surface of one of the first contact plate and the second contact plate, and corresponds to the conical groove or the truncated cone groove on the outer surface of the other contact plate. It may include a conical protrusion or a truncated conical protrusion that is protruded to be inserted into surface contact.

At this time, the connection transmission body includes a magnet member and a pizza magnet member so that the first contact plate and the second contact plate face each other with different polarities and make surface contact by magnetic force, or the first contact plate and the second contact plate. A magnet member may be included on one of the contact plates to make surface contact with the other contact plates by magnetic force.

At this time, the pig body has a first body having a first connection hole into which the connection transmission body is correspondingly inserted, and has a plurality of first elastic plates protruding from the outer rim of the first body to the inside of the conduit. A front body to which the plurality of first elastic plates are in elastic contact with a surface, and a second body having a second connection hole through which the connection transmission body is inserted correspondingly, and a plurality of protrusions formed on the outer edge of the second body. Two second elastic plates are provided to form a rear body through which the plurality of second elastic plates are in elastic contact with the inner surface of the conduit and a third connection hole into which the connection transmission body is inserted correspondingly, and the front body and the rear body It may include an intermediate body disposed between the front body and the rear body having an outer diameter smaller than the outer diameter.

At this time, the first elastic plate includes a first extension plate extending a predetermined length outward from the outer circumferential surface of the first body, and a first bending plate bent from an end of the first extension plate toward the rear body, The second elastic plate may include a second extension plate extending a certain length outward from an outer circumferential surface of the second body, and a second bending plate bent from an end of the second extension plate in a direction opposite to entry.

At this time, the intermediate body includes a plurality of independent discs disposed between the front body and the rear body, and the front and rear surfaces of the plurality of independent discs adjacent to each other are disposed between the plurality of independent discs adjacent to each other. An inclined surface inclined at a certain angle may be included to form a space in which a gap is widened toward the outside.

At this time, the intermediate body includes an integrated disc body disposed between the front body and the rear body, and the integrated disc body is formed on the outer circumferential surface of the third body through which the third connecting hole into which the connection transmission body is inserted is formed. Peaks and valleys may be repeatedly provided to form a space in which the gap widens toward the outside.

At this time, at least one spacer is disposed between the front body and the intermediate body, at least one is disposed between the rear body and the intermediate body, or at least one is disposed between a plurality of independent discs provided in the intermediate body. can do.

According to another aspect of the present invention, arranging the water jet push-type pig assembly inside the inlet of the conduit; High-pressure water is supplied to the inner flow path of the water jet nozzle through the jet water supply pipe, and the jet water sprayed to the inner surface of the conduit through the plurality of nozzle holes collides with the inner surface of the conduit. Transmitting an external force to the pig body; Scratching and removing the scale attached to the inner surface of the conduit while forcibly moving in one direction a pig body elastically in contact with the inner surface of the conduit by an external force transmitted through the connection transmission body; When exposed and disposed on the open outlet side of the conduit, the supply of high-pressure water through the jet water supply pipe is blocked to stop the jet water jetting through the plurality of nozzle holes, and the water jet push-type pig assembly to the outside It provides a conduit cleaning method using a water jet push-type pig assembly, including the step of withdrawing.

According to the above configuration, the water jet push-type pig assembly according to the present invention passes through the inside of the passage of the conduit having different inner diameters, curved or T-shaped, without being clogged by the water jet, so that the conduit It is possible to increase the removal efficiency of the scale adhered to the inner surface of the scale, and to reduce the amount of wastewater generation while significantly reducing the total amount of high-pressure jet water used to move the pig body to remove the scale, thereby reducing management and maintenance costs.

In addition, through location tracking, it can be optimized for pipeline exploration and cleaning work of waterworks pipe network management, and it is possible to reduce maintenance costs by quickly and easily replacing parts in accordance with the reduction of the inner diameter of the pipe, which is the object of cleaning, and the change in pipe diameter. can

The scale removal efficiency can be increased by scraping and removing the scale attached to the inside of the conduit while smoothly passing through the inside of the conduit having a curved part without clogging, and the cleaning process can be tracked while checking the position of the pig body entering the conduit in real time. On the other hand, since the pigment body can be reused according to the internal conditions of the conduit, the washing construction can be operated efficiently and the customs cleaning cost can be reduced.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the configuration of the invention described in the claims.

Figures 1a and 1b is an external perspective view showing a water jet push-type pig assembly according to an embodiment of the present invention.
Figures 2a and 2b is an exploded perspective view showing a water jet push-type pig assembly according to an embodiment of the present invention.
Figure 3 is a cross-sectional perspective view showing a water jet push-type pig assembly according to an embodiment of the present invention.
Figures 4a and 4b is a configuration diagram showing another pig body applied to the water jet push-type pig assembly according to an embodiment of the present invention.
5 is a perspective view showing another embodiment of an intermediate body and first and second elastic plates applied to a pig body of a water jet push-type pig assembly according to an embodiment of the present invention.
6 is a perspective view showing another embodiment of first and second elastic plates applied to a pig body of a water jet push-type pig assembly according to an embodiment of the present invention.
7a and 7b are exploded perspective views and cross-sectional perspective views in which a spacer is applied to a pig body of a water jet push-type pig assembly according to an embodiment of the present invention.
8a to 8e are configuration diagrams showing an embodiment of a connection transmission body applied to a water jet push-type pig assembly according to an embodiment of the present invention.
9a, 9b, and 9c are work process diagrams for removing scales attached to inner surfaces of horizontal pipes, curved pipes, and vertical pipes using a water jet push-type pig assembly according to an embodiment of the present invention.
10A to 10D are work process diagrams for removing scale attached to the inner surface of a conduit using a water jet push-type pig assembly according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein. In order to clearly describe the present invention, parts irrelevant to the description are omitted in the drawings, and the same reference numerals are assigned to the same or similar components throughout the specification.

Words and terms used in this specification and claims are not construed as limited in their ordinary or dictionary meanings, but in accordance with the principle that the inventors can define terms and concepts in order to best describe their inventions. It should be interpreted as a meaning and concept that corresponds to the technical idea.

Therefore, the embodiments described in this specification and the configurations shown in the drawings correspond to a preferred embodiment of the present invention, and do not represent all the technical ideas of the present invention, so that the corresponding configurations are various to replace them at the time of filing of the present invention. There may be equivalents and variations.

In this specification, terms such as "include" or "have" are intended to describe the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

A component being in the "front", "rear", "above" or "below" of another component means that it is in direct contact with another component, unless there are special circumstances, and is "in front", "rear", "above" or "below". It includes not only those disposed at the lower part, but also cases in which another component is disposed in the middle. In addition, the fact that certain components are “connected” to other components includes cases where they are not only directly connected to each other but also indirectly connected to each other unless there are special circumstances.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1A and 1B are external perspective views showing a water jet push-type pig assembly according to an embodiment of the present invention, and FIGS. 2A and 2B are exploded perspective views showing a water jet push-type pig assembly according to an embodiment of the present invention. And, Figure 3 is a cross-sectional perspective view showing a water jet push-type pig assembly according to an embodiment of the present invention.

The water jet push-type pig assembly 1 according to a preferred embodiment of the present invention is forcibly moved in one direction by jet water forcibly injected at high pressure into the inner surface of a conduit P such as an upper and lower sewer pipe buried under the ground. It may include a pig body 100, a water jet nozzle body 200, and a connection transmission body 300 to generate frictional force for scraping and removing foreign substances such as scale attached to the inner surface of the conduit.

As shown in FIGS. 1a, 1b, 2a, 2b and 3, the pig body 100 is attached to the inner surface of the conduit P by frictional force generated while moving in one direction in contact with the inner surface of the conduit P. It may include a front body 10, a rear body 20, and an intermediate body 30 to scrape and remove foreign substances such as scale.

The front body 10 is formed on the outer circumferential surface of the first body 11 having a substantially cylindrical shape so that the inner surface and the end of the conduit P, which is an object to be cleaned, are elastically contacted to generate frictional force for scraping and removing scale. It is a front structure that enters the inside of the conduit in advance, including a plurality of first elastic plates 12 protruding outward at a predetermined height.

The front body 10 includes a first body 11 having a substantially circular cross-section in which the first connection hole 15 in which the front end of the connection transmission body 300 is inserted and positioned is recessed or penetrated in the center of the body. And, the outer circumferential surface of the first body 11 may include a plurality of first elastic plates 12 that protrude outward and are elastically deformed by contacting the inner surface of the conduit elastically.

The first elastic plate 12 includes a first extension plate 12a extending a certain length outward from the outer circumferential surface of the first body 11, and the rear body 20 extends from an end of the first extension plate. It may include a first bending plate (12b) that is bent toward the side.

The front body 10 forms a gap between the plurality of first elastic plates adjacent to each other, thereby forming the elastic deformation of the plurality of first elastic plates elastically contacting the inner surface of the conduit (P) of the conduit. According to the size of the inner diameter, the maximum outer diameter of the front body may be contracted and deformed.

At this time, the gap formed between the plurality of first elastic plates 12 adjacent to each other is the first gap formed by cutting in a substantially V shape between the first extension plates 12a adjacent to each other, and the gap formed between the first extension plates 12a adjacent to each other. It may include a second gap formed by cutting into a substantially quadrangular shape between the first bending plates.

It is preferable that the boundary line between the first extension plate 12a and the first bending plate 12b is substantially curved so as to evenly contact the inner surface of the conduit made of a substantially circular pipe and generate a scratching frictional force. .

At this time, the rear surface of the first body 11 facing the intermediate body 30 enters the inside of the conduit and bends the first end of the first elastic plate elastically deformed so as to shrink and deform the outer diameter of the front body. It is preferable to be provided in a truncated conical shape including an inclined surface inclined at a certain angle so that a separate avoidance space in which the end of the plate is located can be formed between the intermediate body and the intermediate body.

In addition, the front surface of the intermediate body 30 corresponding to the rear surface of the first body 11 is an avoidance space in which the end of the first bending plate, which is the end of the first elastic plate elastically deformed when the outer diameter of the front body is contracted, is located. It is preferable to be provided in a truncated conical shape including an inclined surface inclined at a certain angle so as to sufficiently secure and increase.

In this case, as shown in FIGS. 9A and 9B, when the front body having an outer diameter larger than the inner diameter of the conduit enters the inside of the conduit in advance, the first elastic plate composed of the first extension plate and the first bending plate Since is elastically deformed toward the outer surface of the first body, the front body is contraction-deformed to have a smaller outer diameter, and the plurality of elastically deformed first elastic plates can be elastically in contact with the inner surface of the conduit.

At this time, according to the condition of the inner diameter of the conduit having a smaller inner diameter than the outer diameter of the front body, the outer surface of the first bending plate provided in the front body that has entered the inside of the conduit in advance is in elastic contact with the inner surface of the conduit, so that the pig body A frictional force is generated during the forward movement of the first extension plate or the boundary region between the first extension plate and the first bending plate elastically contacts the inner surface of the conduit to generate a frictional force during the forward movement of the pig body or the outer surface of the first extension plate. It is elastically in contact with the inner surface of the conduit to generate frictional force when the pig body moves forward.

As shown in FIGS. 1a, 1b, 2a, 2b and 3, the rear body 20 provided in the pig body elastically contacts the inner surface and end of the conduit P, which is an object to be washed. It includes a plurality of second elastic plates 22 protruding outward at a predetermined height on the outer circumferential surface of the second main body 21 made of a substantially cylindrical shape so as to generate frictional force for scraping and removing the scale. It is a rear structure that trails into the inside of the conduit.

Like the front body, the rear body 20 includes a second main body 21 having a substantially circular cross-section in which a second connection hole 25 is inserted through the center of the body into which the rear end of the connection transmission body 300 is inserted. And, the outer circumferential surface of the second body 21 may include a plurality of second elastic plates 22 formed to protrude outward and elastically deformed in contact with the conduit.

The second elastic plate 22 includes a second extension plate 22a extending a predetermined length outward from the outer circumferential surface of the second body 21, and in a direction opposite to the entry of the pig body from the end of the second extension plate. It may include a second bending plate (22b) that is bent toward the rear side.

The rear body 20 forms a gap between the plurality of second elastic plates adjacent to each other, similarly to the first elastic plates, so that the plurality of second elastic plates elastically contact the inner surface of the conduit P. The maximum outer diameter of the rear body may be contracted and deformed according to the size of the inner diameter of the conduit by elastic deformation.

At this time, the gap formed between the plurality of second elastic plates 22 adjacent to each other is different from the other first gap formed by cutting in a substantially V shape between the adjacent second extension plates 22a, and adjacent to each other. It may include another second interval formed by being cut in an approximate quadrangle between the second bending plates.

It is preferable that the boundary line between the second extension plate 22a and the second bending plate 22b is substantially curved so as to evenly contact the inner surface of the conduit made of a substantially circular pipe and generate a scratching frictional force. .

The rear surface of the second main body 21 enters into the inside of the conduit and avoids the space where the end of the second bending plate, which is the end of the second elastic plate elastically deformed to shrink and deform the outer diameter of the rear body, is located. It is preferable to be provided in a truncated conical shape including an inclined surface inclined at a certain angle so as to be formed.

In this case, as shown in FIGS. 9A and 9B, when the rear body having an outer diameter larger than the inner diameter of the conduit enters the inside of the conduit along the front body through which the conduit is pre-entered, the second extension plate and the second bend Since the second elastic plate made of a plate is elastically deformed toward the outer surface of the second body, the rear body is shrink-deformed so that the total outer diameter becomes smaller according to the size of the inner diameter of the conduit, and the plurality of second elastic plates elastically deformed It can be resiliently brought into contact with the inner surface of the conduit.

At this time, according to the condition of the inner diameter of the conduit having a smaller inner diameter than the outer diameter of the rear body, the outer surface of the second bending plate provided in the rear body that has entered the inside of the conduit in advance is elastically in contact with the inner surface of the conduit to form a pig body. When moving forward, frictional force is generated along with the front body, or when the boundary area between the second extension plate and the second bending plate is elastically in contact with the inner surface of the conduit, frictional force is generated along with the front body when the pig body moves forward. Or, the outer surface of the second extension plate may be elastically in contact with the inner surface of the conduit to generate frictional force with the front body when the pig body moves forward.

As shown in Figs. 1a, 1b, 2a, 2b and 3, the intermediate body 30 connects the first connection hole 15 of the first body 11 and the second body of the second body. A third connection hole 35 is formed through the center of the body corresponding to the ball 25 and the middle of the length of the connection transmission body 300 is inserted and positioned, and the front body 10 and the rear body 20 It is an intermediate structure that has an outer diameter smaller than the outer diameter and is disposed between the front body 10 and the rear body 20 and enters the inside of the conduit together with the front and rear bodies.

The intermediate body 30 includes a plurality of independent disk bodies 31 disposed between the front body 10 and the rear body 20, and the plurality of independent disk bodies 31 are adjacent to each other. The front and rear surfaces of the independent disc 31 are provided in a truncated conical shape including an inclined surface inclined at a predetermined angle, and a space with a gap widening toward the outside can be formed between a plurality of independent discs 31 adjacent to each other. there is.

In this case, as shown in FIG. 9C, in the course of passing along the curved part of a curved fitting pipe such as an elbow pipe or the curved part of a conduit, a plurality of independent discs corresponding to the inner curved part of the curved part While (31) is gathered without generating compressive force by the space formed by the gap that widens toward the outside, a plurality of independent discs corresponding to the outer curved part of the curved fitting tube opposite the inner curved part will naturally open. can

In addition, although the plurality of disk bodies 31 constituting the intermediate body 30 have been shown and described as being disposed between the front body and the rear body, it is not limited thereto, and the relationship between the front body and the rear body is not limited thereto. By increasing or decreasing the number of installations disposed therebetween, the total length of the pig body 100 including the front, rear and intermediate bodies can be extended or shortened according to the working conditions of the cleaning process of the conduit.

At this time, the intermediate body 30 is composed of a plurality of disk bodies 31 having different thicknesses according to the length of the pig body passing through the conduit or a plurality of disk bodies 31 having the same thickness as each other can be made with

The intermediate body 30 is larger than the maximum outer diameter of the first and second bodies provided in the front and rear bodies and smaller than the inner diameter of the inner tube so that the outer rim does not come into contact with the inner surface of the conduit and stably maintains a predetermined interval. It is preferable to be provided with an outer diameter size.

In addition, the outer diameter of the front body 10 is the same as that of the rear body 20, and the outer diameter of the first body 11 provided on the front body is the second body provided on the rear body ( 21) is preferably set to be the same as the outer diameter.

In addition, when the front body 10 and the rear body 20 enter the inside of the conduit, the elastic deformation of the first and second elastic plates is more smoothly performed, and the molding process can be more easily performed. It is preferable to be made of a resin material so as to be.

The intermediate body 30 is also preferably made of a resin material so that it can be elastically deformed when contacting an adjacent member between the front body and the rear body.

In addition, the front body, the intermediate body and the rear body integrally connected to each other by the insert 330 of the connection transmission body 300 have been shown and described as being composed of independent structures, but are not limited thereto, and the front body The plurality of discs may be formed of an integral resin structure having an intermediate body formed integrally on the rear surface thereof, and the rear body may be formed of an integrated resin structure having an intermediate body integrally formed of a plurality of disc bodies integrally formed on the front surface thereof.

Here, the pig body 100 has been shown and described as being made of an assembly-type resin structure in which the front body 10, the intermediate body 30 and the rear body 20 are integrally assembled by the connection transmission body 300, but this It is not limited, and the pig body may be made of an integral resin structure having the connection transmission body in the center of the body.

Figures 4a and 4b is a configuration diagram showing another pig body applied to the water jet push-type pig assembly according to an embodiment of the present invention.

As shown in FIGS. 4A and 4B, the pig body 100a includes a cylindrical body 101 in which an inner surface and an outer surface of the conduit are in elastic contact, and the outer diameter is gradually reduced at the tip of the cylindrical body. Including the protrusion 102 of the formed cone cross section, and the tip of the connection transmission body is correspondingly inserted into the center of the body of the cylindrical body to form an insertion hole 105 in which the connection transmission body 300 is disposed. It may be made of a resin structure.

On the outer surface of the cylindrical body elastically contacting the inner surface of the conduit (P), a plurality of spiral grooves (103) formed in a spiral shape to generate frictional force when the pig body moves forward to scrape off scale attached to the inner surface of the conduit (103). ) may be included.

5 is a perspective view showing another embodiment of an intermediate body and first and second elastic plates applied to a pig body of a water jet push-type pig assembly according to an embodiment of the present invention.

The intermediate body 30 may be formed of an integral structure in which a plurality of discs are integrally formed, and as shown in FIG. ) on the outer circumferential surface of the third body 32 through which peaks and valleys are repeatedly formed to form a space with a gap widening toward the outside, and wrinkles forming a space between adjacent mountains with a gap widening toward the outside ( 33).

In this case, the integral intermediate body 30 having the wrinkles 33 in which peaks and valleys are repeatedly formed corresponds to the inner curved portion of the curved fitting pipe in the process of passing along the curved portion of the curved fitting pipe such as an elbow pipe. The peaks and valleys of the creases are gathered without generating compressive force due to the space formed by the gap that widens toward the outside, while the peaks and valleys of the corrugation corresponding to the outer curve of the curved fitting pipe opposite the inner curvature will naturally widen. can

Accordingly, by providing an intermediate body that is easily bent and deformed between the front body and the rear body, the curve provided in the middle of the length of the conduit by the external force generated by the jet water injected at high pressure into the inner surface of the conduit In the process of passing through the curved fitting pipe connected to the section or conduit, the middle of the length of the pig body is smoothly bent into a curved shape to prevent the pig body from being blocked and stopped in the curved section, while ensuring smooth one-way forward movement of the pig body. can

In addition, as shown in FIG. 5, the first and second elastic plates 12 and 22 of the front and rear bodies 10 and 20 increase the frictional force when contacting the inner surface of the conduit, thereby increasing the efficiency of scraping and removing scale. It is preferable to include first and second protrusions 12c and 22c protruding to increase the height.

The first and second protrusions 12c and 22c are illustrated as protruding from the first and second bending plates of the first and second elastic plates, but are not limited thereto, and the first and second projections corresponding to the inner surface of the conduit are not limited thereto. It may also be protruded and provided on the outer surface of the extension plate.

At this time, it is preferable that the first and second protrusions 12c and 22c are provided as linear or embossed portions of mountain cross-section.

6 is a perspective view showing another embodiment of first and second elastic plates applied to a pig body of a water jet push-type pig assembly according to an embodiment of the present invention.

In addition, the first and second extension plates 12a and 22a of the first and second elastic plates 12 and 22 provided on the first and second bodies 11 and 21 of the front and rear bodies 10 and 20 are shown in FIG. As shown in 6, by being provided with a wing-type inclined plate having a twisted inclined surface inclined at a predetermined angle with respect to the traveling direction of the front and rear bodies, the pig While the body 100 moves forward along the inner surface of the conduit, the pig body having the front body and the rear body rotates as a whole, resulting in frictional force generated between the first and second elastic plates and the inner surface of the conduit in contact with the first and second elastic plates. It is possible to further increase the efficiency of scraping and removing scale.

7a and 7b are exploded perspective views and cross-sectional perspective views in which a spacer is applied to a pig body of a water jet push-type pig assembly according to an embodiment of the present invention.

As shown in FIGS. 7A and 7B, the intermediate body 30 including a plurality of independent disk bodies 31 is selectively disposed between at least one independent disk body adjacent to each other, or the front body and the independent disk body It may include at least one spacer 36 selectively disposed between the rear body and at least one spacer 36 selectively disposed between the independent disc body.

The spacer 36 may be formed of a disc member in which a connection hole through which the connection transmission body passes is disposed in the center of the body.

Accordingly, the total length of the pig body 100 including the front and rear bodies 10 and 20 and the intermediate body 30 is extended or shortened according to the working conditions of the conduit cleaning process according to the number of spacers installed. can be reduced

In addition, the space is secured by increasing the distance between the spacers interposed between the independent discs adjacent to each other and the spacer interposed between the front and rear bodies and the independent discs, thereby securing space. And in the process of passing the intermediate along the curved part of the curved fitting tube, such as an elbow tube, the contact pressure between adjacent members can be minimized to smoothly move the body in one direction inside the conduit without obstruction.

As shown in FIGS. 1A, 1B, 2A, 2B and 3, the water jet nozzle body 200 is located immediately behind the pig body 100 entering the conduit P in advance, It is a nozzle structure that enters the inside of the conduit along with the pig body and is disposed in the center of the conduit to spray the water jet.

The water jet nozzle body 200 is connected in communication with the jet water supply pipe 230 through which high-pressure supply water is supplied from the outside to form an internal passage 215 in the center of the body so that the jet water is supplied, and from the internal passage to the outside at a certain angle It may include a plurality of nozzle holes 210 that branch obliquely and inject high-pressure jet water toward the inner surface of the conduit P.

The plurality of nozzle holes 210 are branched from the inner passage at a predetermined angle in an opposite direction to the forward movement direction of the pig body, and are provided to be exposed on the outer surface of the water jet nozzle body 200, thereby forming a constant inner surface of the conduit. It is to spray high-pressure jet water in an angled direction.

Accordingly, when the high-pressure jet water injected from the plurality of nozzle holes 210 provided in the water jet nozzle body 200 is sprayed at an angle and collided with the inner surface of the conduit, the water jet nozzle body disposed inside the conduit 200 generates an external force that pushes the water jet nozzle body toward the pig body due to the repulsive force generated by the jet water hitting the inner surface of the conduit at high pressure.

At the same time, the remaining scale that is not removed by the pig body entering the conduit in advance is removed by the high-pressure jet water sprayed from the plurality of nozzle holes, thereby increasing the cleaning efficiency.

As shown in Figs. 1a, 1b, 2a, 2b and 3, the connection transmission body 300 enters the rear end of the pig body 100 that enters the inside of the conduit in advance and enters the inside of the conduit later. The external force that pushes the water jet nozzle body toward the pig body due to the repulsive force generated by the jet water hitting the inner surface of the conduit at high pressure while the front ends of the water jet nozzle body 200 are in surface contact with each other. The pig body and the water jet It connects the nozzle bodies to each other.

The connection transmission body 300 includes a first contact plate 310 provided at an end of the insert and fixedly installed on the rear surface of the pig body 100 corresponding to the water jet nozzle and exposed, and corresponding to the pig body. It may include a second contact plate 320 which is provided at the front end of the water jet nozzle body 200 and interviews the first contact plate 310.

At this time, the first contact plate 310 is made of a substantially circular disk body integrally provided at the end of the insert 330 having a certain length inserted into the body of the pig body 100, or is connected to the water jet nozzle. It may be made of a substantially circular disc body that is fixedly installed in a disposition groove formed in a depression on the rear surface of the corresponding pig body 100 and exposed to the outside.

The insert 330 is formed through the first connection hole 15 formed through the first body 11 of the front body 10 and the second connection formed through the second body 21 of the rear body 20. It may be inserted and disposed through the ball 25 and the third connection hole 35 formed through the intermediate body 30 to be provided as a connecting member of a certain length that integrally connects the front body, the rear body and the intermediate body.

The insert 330 may be formed of a hollow pipe member having an internal space and having a predetermined length or a circular bar having a circular cross section and a predetermined length.

When the insertion body is made of a hollow pipe member having a certain length, the first contact plate 310 is inserted into the open end of the hollow pipe member facing the water jet nozzle body to replace the assembly of the insertion bar 315. It is provided at the end and may be externally exposed to the rear surface of the pig body.

At this time, the front end of the insert 330 corresponding to the front body 10 has been shown and described as being located at the closed end of the first connection hole recessed in a blind shape in the center of the body of the front body, but limited thereto. It is not, and the front end of the insert is exposed to the outside through a second connection hole formed through the center of the body of the front body, and the open end can be covered by a separate cap member to be sealed.

The cap member is formed of a cylindrical body formed on an outer circumferential surface of a female screw part formed on the inner circumferential surface of the open end of the insert 330 and a male screw part screwed together, or a cylindrical body whose outer circumferential surface is press-fitted to the inner circumferential surface of the open end of the insert 330. It can be made of a sieve.

The insertion body 330), together with the front and rear bodies 10 and 20 and the intermediate body 30, is made of plastic so that it can be naturally bent while passing along the curved part of a curved fitting pipe such as an elbow pipe. It may be made of a resin material.

And, in the inner space of the insert 330 made of the hollow pipe member, at least one location tracking sensor 50 such as a GPS is installed so that the position of the pig body moving in one direction after entering the inside of the conduit can be confirmed from the outside in real time. It is preferable to install built-in.

When the pig body is stopped by the scale attached to the inside of the conduit, the position of the pig body that has entered the conduit can be accurately identified and confirmed in real time by receiving the transmission signal transmitted to the position tracking sensor from the outside, and Since the collection time can be reduced by accurately confirming the location of the temporarily stopped pig body, the time during which the duct cleaning process is stopped can be minimized, and the productivity of the customs work for cleaning the duct can be increased by reducing the operator's workload.

Accordingly, the insert connecting the front, rear body and the intermediate body integrally is made of a hollow pipe member or a solid member made of a resin material capable of bending deformation, so that in the middle of the length of the conduit by the forced water flowing into the conduit In the process of passing through a curved section or a curved fitting pipe connected to a conduit, it is provided in the middle of the length of the pig body and is bent into a curved shape along with an intermediate body that is bent and deformed to prevent the pig body from being blocked and stopped in the curved section. Smooth one-way movement of the sieve can be guaranteed.

On the other hand, the second contact plate 320 is provided integrally with the front end of the water jet nozzle body 200 facing the pig body 100 so as to make surface contact with the first contact plate, or has a substantially circular shape assembled to be replaceable. It may be provided as a disc body.

8a to 8e are configuration diagrams showing an embodiment of a connection transmission body applied to a water jet push-type pig assembly according to an embodiment of the present invention.

As shown in FIG. 8A, the first contact plate 310 and the second contact plate 320 have been shown and described as being composed of approximately circular disks having the same outer diameter, but are not limited thereto. The first contact plate and the second contact plate may be formed of a circular disk body having a different outer diameter or a polygonal plate body such as a square, and may be in surface contact.

When the second contact plate 320 is made of a disk body having an outer diameter larger than the outer diameter of the first contact plate 310 and contacts, the external force pushing the pig body can be evenly distributed and transmitted to the rear surface of the pig body, When the second contact plate 320 is made of a disc having an outer diameter smaller than that of the first contact plate and contacts, the external force pushing the pig body can be concentrated and transmitted to the center of the first contact plate 310. .

As shown in FIG. 8B, the connection transmission body 300 protrudes a protrusion 311 for positioning on the outer surface of the first contact plate on one side of the first contact plate 310 and the second contact plate 320, and , It is possible to include a positioning groove 321 by forming a depression on the outer surface of the second contact plate, which is the remaining contact plate, into which the positioning protrusion is correspondingly inserted.

When the first contact plate 310 and the second contact plate 320 make surface contact, the coupling between the positioning protrusion 311 and the positioning groove 321 provided on the outer surface at the center of the first and second contact plates As a result, it is possible to more accurately perform the operation of surface contacting the first contact plate 310 and the second contact plate 320 by facing each other, and to prevent the surface contact portion from slipping and twisting when an external force is transmitted.

As shown in FIGS. 8C and 8D, the connection transmission body 300 has a conical groove 312 or a truncated cone on the outer surface of the first contact plate on one side of the first contact plate 310 and the second contact plate 320. The conical protrusion 322 or the truncated conical protrusion 322 formed by recessing the concave groove 312a and correspondingly inserted into the conical concave groove 312 or the truncated conical concave groove 312a on the outer surface of the second contact plate, which is the remaining contact plate, makes surface contact. ) may be included by protruding formation.

When the first contact plate 310 and the second contact plate 320 make surface contact, the conical groove 312 or the truncated cone groove 312a provided on the outer surfaces of the first and second contact plates and the conical protrusion 322 ) Or the connection between the truncated conical protrusions 322 makes the first contact plate 310 and the second contact plate 320 face each other in surface contact to more accurately connect the pig body and the water jet nozzle body to each other. In addition, the surface contact area between the first contact plate 310 and the second contact plate 320 may be increased to increase the efficiency of transmitting the external force.

As shown in FIG. 8E, the connection transmission body 300 includes a magnet member 313 integrally provided on one side of the first contact plate among the first contact plate 310 and the second contact plate 320, and , It is provided on the outer surface of the second contact plate, which is the remaining contact plate, and may include a magnet member 323 that faces the magnet member with a different polarity to generate magnetic force, which is an attractive force.

At this time, the magnet member 313 and the magnet member 323 face each other on the outer surfaces of the first contact plate and the second contact plate, and are in surface contact by magnetic force due to different polarities, and are connected in surface contact. Although it has been shown and described as being provided as a permanent magnet member for holding, it is not limited thereto, and any one of the magnet member and the pizza stone member is selectively attached to any one of the contact plates of the first contact plate and the second contact plate. It may be provided as a permanent magnet that makes surface contact with the remaining contact plate made of a metal material by magnetic force and maintains a surface contact connection state.

When the first contact plate 310 and the second contact plate 320 make surface contact, the first contact plate 310 is moved by the magnetic force between the magnet member provided on the outer surfaces of the first and second contact plates and the magnet member. And the second contact plate 320 face each other to make surface contact, and at the same time, the pig body and the water jet nozzle body can be connected to each other, separated from each other, and disassembly can be performed more accurately and conveniently.

10A to 10D are work process diagrams for removing scale attached to the inner surface of a conduit using a water jet push-type pig assembly according to an embodiment of the present invention.

The process of cleaning by scraping and removing the scale attached to the inner surface of the conduit P using the water jet push-type pig assembly 1 having the above configuration, first, as shown in FIG. 10A, the conduit to be cleaned A water jet push type pig assembly 1 consisting of a pig body 100, a water jet nozzle body 200 and a connection transmission body 300 is prepared and placed at the entrance of the inlet connector 4 connected in communication with one side of the Next, the water jet push-type pig assembly 1 is placed inside the inlet of the conduit to be cleaned.

At this time, the water valves 7 provided at both ends of the conduit, which is the object to be cleaned, are switched to a closed state to temporarily block the flow of water inside the conduit to the outside during the cleaning process.

When the water jet push-type pig assembly 1 is at one side of the conduit, as shown in FIG. 10C, a high pressure is applied to the internal passage 215 of the water jet nozzle body 200 through the jet water supply pipe 230. When water is supplied, high-pressure jet water is sprayed toward the inner surface of the conduit through a plurality of nozzle holes 210 branching outward from the internal passage, so that the water jet nozzle body has a plurality of nozzle holes An external force that pushes the pig body 100 entering the inside of the conduit in advance is generated by the reaction force generated when the jet water injected from the conduit collides with the inner surface of the conduit.

Continuously, as shown in FIG. 10C, when the pig body 100 is moved forward in one direction along the inside of the conduit by an external force transmitted through the connection transmission body 300, the front and rear bodies provided Since the front and rear bodies having the first and second elastic plates are forcibly moved in one direction by the jet water in a state where the first and second elastic plates are in elastic contact with the inner surface of the conduit, the ends of the first and second elastic plates Frictional force is generated between the and the inner surface of the conduit, and the scale attached to the inner surface of the conduit can be scratched and removed by the frictional force generated at this time.

At this time, the water jet push-type pig assembly, which is moved in one direction by the jet water inside the conduit, can check the moving position in real time by the transmission signal of the position tracking sensor provided in the connection transmission body.

Finally, as shown in FIG. 10D, when the pig body of the water jet push-type pig assembly passes through the inside of the conduit to be cleaned and is exposed to the outlet connection pipe communicating with the other side of the conduit, the jet water supply pipe After stopping the supply of high-pressure water that is forcibly injected through the outlet connection pipe, the pig body exposed in advance through the outlet connector and the water jet nozzle body connected to the pig body and the connection transmission body are pulled out and collected to the inside of the conduit. The custom washing process to remove the attached scale is finished.

Although the embodiments of the present invention have been described, the spirit of the present invention is not limited by the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention may add or change components within the scope of the same spirit. Other embodiments can be easily proposed by adding, deleting, adding, etc., but this will also be said to be within the scope of the present invention.

10: front body 11: first body
12: first elastic plate 15: first connecting hole
20: front body 21: second body
22: second elastic plate 25: second connecting hole
30: intermediate body 31: disc body
32: second body 33: wrinkles
35: third connection hole 36: spacer
100: Pig body 200: Water jet nozzle body
210: nozzle hole 215: internal flow path
300: connection transmission body 310: first contact plate
320: second contact plate 330: insert

Claims (16)

In the pig assembly for scraping and removing the scale attached to the inner surface of the conduit while moving in one direction along the inside of the conduit,
A pig body that enters the inside of the conduit in advance and elastically contacts the inner surface and the outer surface of the conduit;
It is connected to the jet water supply pipe inside the body to form an internal passage through which jet water is supplied, and a plurality of nozzle holes branching outward from the internal passage to inject jet water toward the inner surface of the conduit are provided to follow the inside of the conduit. Entering water jet nozzle body;
a connection transmission body that transmits an external force by making surface contact while connecting the rear end of the pig body and the front end of the water jet nozzle body; including,
The pig body has a first body having a first connection hole into which the connection transmission body is correspondingly inserted, and has a plurality of first elastic plates protruding from the outer rim of the first body to the inner surface of the conduit. A front body to which the plurality of first elastic plates are elastically contacted;
The connection transmission body has a second body through which the second connection hole is inserted, and a plurality of second elastic plates protruding from the outer rim of the second body are provided on the inner surface of the conduit. 2The posterior body to which the elastic plate is elastically contacted and
Including an intermediate body disposed between the front body and the rear body having an outer diameter smaller than the outer diameter of the front body and the rear body, wherein the connection transmission body penetrates the third connection hole into which the corresponding connection is inserted,
The jets injected from the plurality of nozzle holes collide with the inner surface of the conduit to generate an external force that pushes the pig body through the connection transmission body, and the outer surface of the pig body forcedly moved by the external force and the inner surface of the conduit A water jet push-type pig assembly that generates frictional force to scrape off the scale between. According to claim 1,
The pig body includes a cylindrical body in which the inner surface and the outer surface of the conduit are elastically contacted, and a protrusion of a cone end surface formed so that the outer diameter gradually decreases at the tip of the cylindrical body, so that the tip of the connection transmission body is connected to the cylindrical body. A water jet push-type pig assembly made of an integral resin structure provided with a corresponding insertion. According to claim 1,
The connection transmission body includes a first contact plate fixedly installed to be exposed on the rear surface of the pig body corresponding to the water jet nozzle, and a second contact plate provided at the front end of the water jet nozzle corresponding to the pig body and interviewing the first contact plate. A water jet push-type pig assembly comprising a plate. According to claim 3,
The first contact plate is inserted into the body of the pig body and is provided integrally with or replaceably provided at an end of the insert facing the water jet nozzle. According to claim 4,
The insert is made of a hollow pipe member, and the first contact plate is provided at an end of an insertion bar inserted into an open end of the hollow pipe member facing the water jet nozzle body. According to claim 4,
The insert is made of a hollow pipe member and at least one position tracking sensor is embedded in the inner space, a water jet push-type pig assembly. According to claim 3,
The second contact plate is provided integrally with or replaceably assembled at the front end of the water jet nozzle facing the pig body, the water jet push-type pig assembly. According to claim 4,
The connection transmission body includes a positioning protrusion that protrudes from the outer surface of one of the first contact plate and the second contact plate, and is recessed so that the positioning protrusion is inserted into the other contact plate in correspondence with the other contact plate. A water jet push-type pig assembly comprising a groove for use. According to claim 4,
The connection transmission body includes a conical groove or a truncated cone groove recessed on the outer surface of one of the first contact plate and the second contact plate, and is inserted into the conical groove or the truncated cone groove on the outer surface of the remaining contact plate. A water jet push-type pig assembly comprising a conical protrusion or a truncated conical protrusion protruding to be in surface contact. According to claim 4,
The connection transmission body includes a magnet member and a pizza magnet member so that the first contact plate and the second contact plate face each other with different polarities and make surface contact by magnetic force, or one of the first contact plate and the second contact plate. A water jet push-type pig assembly comprising a magnet member to make surface contact with the contact plate of the other contact plate by magnetic force. delete According to claim 1,
The first elastic plate includes a first extension plate extending a predetermined length outward from the outer circumferential surface of the first body and a first bending plate bent toward the rear body from an end of the first extension plate, or The second elastic plate includes a second extension plate extending a predetermined length outward from the outer circumferential surface of the second body, and a second bending plate bent from an end of the second extension plate in an opposite direction to entry, a water jet push type Pig assembly. According to claim 1,
The intermediate body includes a plurality of independent disc bodies disposed between the front body and the rear body,
The front and rear surfaces of the plurality of independent discs adjacent to each other include inclined surfaces inclined at a predetermined angle so as to form a space that is spaced outwardly between the plurality of independent discs adjacent to each other. Water jet push-type pig assembly. According to claim 1,
The intermediate body includes an integral disc disposed between the front body and the rear body,
The integrated disk body is a water jet push-type pig assembly in which ridges and valleys are repeatedly provided to form a space with a gap widening toward the outside on the outer circumferential surface of the third body through which the third connection hole into which the connection transmission body is correspondingly inserted is formed. . According to claim 1,
At least one spacer disposed between the front body and the intermediate body, at least one disposed between the rear body and the intermediate body, or at least one disposed between a plurality of independent discs provided in the intermediate body, Water jet push-type pig assembly. Disposing the water jet push-type pig assembly of any one of claims 1 to 10 and 12 to 15 inside the inlet of the conduit;
High-pressure water is supplied to the inner flow path of the water jet nozzle through the jet water supply pipe, and the jet water sprayed to the inner surface of the conduit through the plurality of nozzle holes collides with the inner surface of the conduit. Transmitting an external force to the pig body;
Scratching and removing the scale attached to the inner surface of the conduit while forcibly moving in one direction a pig body elastically in contact with the inner surface of the conduit by an external force transmitted through the connection transmission body;
When exposed and disposed on the open outlet side of the conduit, the supply of high-pressure water through the jet water supply pipe is blocked to stop the jet water jetting through the plurality of nozzle holes, and the water jet push-type pig assembly to the outside withdrawing; Containing, pipe cleaning method using a water jet push-type pig assembly.

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