KR101910415B1 - Shot blasting equipment for rehabilitating superannuated pipes - Google Patents

Abstract

The present invention relates to shot blasting equipment to regenerate a pipe, capable of effectively advancing a regeneration process. According to the present invention, the shot blasting equipment to regenerate a pipe comprises a shot ball tank (100) to store a fine shot ball and a blaster (200) using high pressure compressed air to shoot the shot ball supplied from the shot ball tank (100) to the inner circumferential surface of a pipe (P).

Description

{Shot blasting equipment for rehabilitating superannuated pipes}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a blasting apparatus for regenerating a pipeline, and more particularly, to a blasting apparatus for pipeline regeneration capable of easily performing a surface treatment on a pipeline before a coating process for regenerating the old pipe.

Generally, a large pipe such as a water pipe is formed of a cast iron pipe or a steel pipe, and a coating film is formed on the inner circumferential surface of the pipe to prevent the pipe from being corroded by the flowing fluid. The inner pipe is peeled by the change of the temperature and pressure after the pipe is buried. Once the peeling is progressed, the peeling is further promoted by the resistance according to the flow of the fluid. Then, the corrosion due to the oxidation occurs. In addition, after a long period of time, a water layer is formed on the film, resulting in deterioration of water quality.

In order to solve such a problem, there is a method of replacing the entire pipeline. However, since there is a great inconvenience to the passage as well as a lot of construction time while digging the ground and newly filling the land, recently, Has been proposed.

In order to regenerate the pipeline, it is necessary to first remove the old coating and the corrosion surface from the inner circumference of the pipe, and then form a new coating film. In order to achieve this, the blasting equipment is firstly inserted into the pipe, and a plurality of fine balls are sprayed on the inner circumferential surface of the pipe while moving along the pipe, thereby removing the old coating film and the corrosion surface. Recovered and reused to remove coatings and corrosion. Prior art related to this is disclosed in.

However, since the shot ball is fired by compressed air, a large amount of dust is generated in the process of removing the coating film and the corrosion surface, and the shot ball dropped on the floor is mixed with the dust. Therefore, The shot ball required a separate process to separate it, and thus the blasting process took a lot of time. Also, since the generated dust is very harmful to the operator, there was a problem that a separate dust collecting device was required to collect the dust.

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a blasting apparatus for a pipe rehabilitation device capable of effectively regenerating a dust- And to provide the above-mentioned objects.

In order to accomplish the above object, the present invention provides a blasting apparatus for regenerating a pipeline, which is used for regenerating a pipeline (P) provided with an air exhaust port (A) (B) for generating a one- And a blaster 200 for spraying a shot ball supplied from the short ball tank 100 and the shot ball supplied from the shot ball tank 100 to the inner circumferential surface of the pipe P using high-pressure compressed air; The blaster 200 is mounted on a bogie M running in the pipeline P and is connected to a short ball hose S1 for supplying the short ball and an air hose S2 for supplying compressed air A base body 210; A swivel joint 220 installed to be rotatable on the front side of the base body 210; A distributor 230 fastened to the swivel joint 220 and having first and second jetting ports 231 and 232 formed symmetrically with respect to the center of the conduit; A shaft 240 extending toward the front side of the distributor 230; First and second supports 250 and 250 'supported in a vertical direction to the shaft 240; First and second nozzles 260 and 260 'connected to the first and second injection ports 231 and 232 to inject the shot ball into the inner circumferential surface of the pipe P; A first and a second nozzle fastening bodies 270 and 270 'for fastening the first and second nozzles 260 and 260' to the first and second supports 250 and 250 '; And a second circular shape having an outer diameter D2 smaller than an inner diameter D1 of the pipe P and being supported by the shaft 240 on the front side of the first and second nozzles 260 and 260 ' And a shield (280).

The distributor 230 may include a main chamber 233 for communicating the flow path 221 of the swivel joint with the first and second injection ports 231 and 232, And a sub-chamber 234 which is biased toward the main chamber 233 with respect to an extension line connecting the main chamber 233.

The distributor 230 further includes a dispersion barrier 235 partitioning the main chamber 233 and the sub-chamber 234 in the longitudinal direction. At this time, the partition 235 has a shape in which the front end 235a and the rear end 235b are bent at an angle of 90 °, and the front end 235a side has the first and second ejection openings 231 and 232 1/2.

In the present invention, the first and second nozzle fastening bodies 270 and 270 ' The first and second nozzle heads 262 and 262 'constituting the first and second nozzles 260 and 260' are supported so as to face the opposite sides of the air flow direction.

In the present invention, the first and second nozzle assembling steps 270 and 270 'include a blade 271 installed at each end of the first and second supports 250 and 250' 271 and 272. The first and second nozzle heads 262 and 262 are rotatably coupled to the first and second nozzle heads 261 and 271 by a hinge shaft H and are rotatable about the hinge axis H. The rotation bracket 272 supports the first and second nozzle heads 262 and 262 ' And an angle fixing part 273 for fixing the rotation angle of the rotation bracket 272 so that the spray angle of the first and second nozzle heads 262 and 262 ' .

The first nozzle 260 may include a first nozzle 261 connected to the first injection port 231 and a first nozzle head 262 installed at an end of the first hose 261, ; The second nozzle 260 'includes a second hose 261' connected to the second injection port 232 and a second nozzle head 262 'installed at an end of the second hose 261' ; The first nozzle head 262 is installed at the second nozzle coupling end 270 'and the second nozzle head 262' is installed at the first nozzle coupling end 270.

In the present invention, the outer diameter D3 smaller than the inner diameter D1 of the pipe P, which is supported by the base body 210 on the rear side of the first and second nozzles 260 and 260 ' And a second circular shield (290) having a first end and a second end.

According to the present invention, in the blasting process for removing the aged coating film and the corrosive surface while moving inside the pipeline P, dust-containing dust can be prevented from mixing with the shot ball, and the process of separating the dust and the shot ball can be omitted Thus, the pipeline rehabilitation process can be performed quickly.

Also, since the short ball mainly falls in the space between the first and second circular shields 280 and 290, the recovery of the shot ball can be facilitated.

The subchamber 234 includes a sub-chamber 234 formed inside the distributor 230 so as to be opposed to the main chamber 233 with reference to an extension line connecting the first and second injection ports 231 and 232, Is prevented from moving to the inside of the sub-chamber 234, thereby preventing the front end side of the distributor from being damaged.

The first nozzle head 262 is attached to the second nozzle fastening end 270 'and the second nozzle head 262' is fastened to the first nozzle fastening end 270 The shot ball can be uniformly sprayed on the upper surface or the lower surface of the inner circumferential surface of the pipe P in spite of its own weight.

FIG. 1 is a view for explaining a blasting apparatus for regenerating a pipeline of the present invention,
FIG. 2 is a view for explaining the configuration of the blasting equipment of FIG. 1,
3 is a view for explaining the internal configuration of the distributor of FIG. 2,
FIG. 4 is a view for explaining the main chamber and the sub-chamber of FIG. 3,
FIG. 5 is a perspective view showing a dispersion barrier built in the main chamber and the sub-chamber of FIG. 4,
FIG. 6 is a view for explaining the first and second nozzle fastening stages for fixing the first and second nozzles of FIG. 2 in an angle-
Fig. 7 is a view for explaining that the first nozzle of Fig. 2 is installed at the second nozzle engagement end and the second nozzle is installed at the first nozzle engagement end,
8 is a view for explaining the configuration of the first and second circular shields of FIG. 2;

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In the following examples, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the following embodiments, terms such as inclusive or possessive are intended to mean that a feature, or element, described in the specification is present, and does not preclude the possibility that one or more other features or elements may be added.

In the following embodiments, when a part of a film, an area, a component or the like is on or on another part, not only the case where the part is directly on the other part but also another film, area, And the like.

In the drawings, components may be exaggerated or reduced in size for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

If certain embodiments are otherwise feasible, the particular process sequence may be performed differently from the sequence described. For example, two processes that are described in succession may be performed substantially concurrently, and may be performed in the reverse order of the order described.

FIG. 1 is a view for explaining a blast equipment for rehabilitating a pipeline according to the present invention, which is introduced into a pipeline for rehabilitation of a waste pipe. FIG. 2 is a view for explaining the configuration of the blast equipment of FIG. 3 is a view for explaining a main chamber and a subchamber of FIG. 3, and FIG. 5 is a cross-sectional view of the main chamber and the subchamber of FIG. And is a perspective view showing the dispersion barrier.

As shown in the drawings, the blast equipment for regenerating a pipe according to the present invention is for recovering the pipe P while moving inside a pipe P such as a water pipe, and is provided with a shot ball tank And a blaster 200 for removing aged coatings and corrosion surfaces on the inner circumferential surface of the pipe using compressed air supplied from a short ball tank 100 and high-pressure compressed air.

Generally, the rehabilitation of the pipeline (P) proceeds sequentially by dividing the pipeline of several tens of kilometers, and is divided into units of lengths of about 1 Km. At this time, a supply portion A for supplying air is provided in front of the regeneration conduit P and an exhaust port B for exhausting air is provided at the rear side to generate an air flow in one direction in the conduit P, Thus, fresh air that can be breathed by the worker working in the pipeline (P) is continuously supplied.

The short ball tank 100 is configured in the form of a double tank of an upper tank and a lower tank, so that the shot ball can be filled and projected. The short ball tank 100 supplies the short ball to the blaster 200 through the short ball hose S1.

As shown in FIG. 2, the blaster 200 is mounted on a carriage M that travels in the pipeline P, and includes a short ball hose S1 for supplying a short ball and an air hose S1 for supplying compressed air. A base body 210 connected to the base body 210; A swivel joint 220 rotatably installed on the front side of the base body 210; A distributor 230 coupled to the swivel joint 220 and having first and second injection ports 231 and 232 formed symmetrically with respect to a center of the pipe; A shaft 240 extending toward the front side of the distributor 230; First and second supports 250 and 250 'supported in a vertical direction to the shaft 240; First and second nozzles 260 and 260 'connected to the first and second ejection openings 231 and 232 of the distributor to eject the short ball S; First and second nozzle fastening bodies 270 and 270 'for fastening the first and second nozzles 260 and 260' to the first and second supports 250 and 250 '; The first circular shield 280 having an outer diameter D2 smaller than the inner diameter D1 of the duct P is supported on the front side shaft 240 of the first and second nozzles 260 and 260 ' Wow; A second circular shield (not shown) having an outer diameter D3 smaller than the inner diameter D1 of the pipe P, which is supported by the base body 210 on the rear side of the first and second nozzles 260 and 260 ' 290).

The inner diameter D1 of the conduit P is smaller than the first and second outer diameters D2 and D3 of the first and second circular shields 280 and 290. In this embodiment, ) Has an inner diameter of 2 m. The first and second outer diameters D2 and D3 of the first and second circular shields 280 and 290 are 1.6 m. The outer diameter D2 of the first circular shield 280 and the outer diameter D3 of the second circular shield 290 may be the same but may be different.

The base body 210 is mounted on a carriage C moving in the pipeline P and a first connector 211 for connecting the short ball hose S1 connected to the short ball tank 100 is formed, And a second connector 212 for connecting an air hose S2 connected to a compressor (not shown).

The swivel joint 220 rotatably supports the distributor 230 on the front side of the base body 210 while supplying the short ball S and the air hose S2 via the short ball hose S1 A flow path 221 for guiding the compressed air to the distributor 230 is formed. The swivel joint 220 is rotated by a gear assembly (not shown) installed inside the base body 210.

The distributor 230 is fastened to the swivel joint 220 and rotated with its swivel joint 220. 3 and 4, a main chamber 233 for communicating the flow path 221 of the swivel joint with the first and second injection ports 231 and 232, And a sub-chamber 234 biased toward the front side of the main chamber 233 with respect to an extension line connecting the first and second injection ports 231 and 232.

In the main chamber 233, the short ball S supplied through the flow path 221 and the compressed air are mixed and then injected into the first and second injection ports 231 and 232.

The sub-chamber 234 is formed to have a predetermined depth offset to the front side of the main chamber 233 with respect to the extension of the first and second ejection openings, and the predetermined depth is preferably 50 mm.

The front end of the sub-chamber 234 is closed and a large pressure is formed compared to the main chamber 233, so that the shot ball S transported by the compressed air is not transported to the inside of the sub-chamber 234 And quickly exits while turning toward the first and second injection ports 231 and 232. Therefore, the short ball S moving at a high speed does not move to the front end of the sub-chamber 234. It is possible to prevent the front end side of the distributor from being damaged.

For reference, the shot ball (S) has enough energy to remove not only the coating on the iron pipe but also the corrosion surface. Accordingly, when the front end wall is formed at the first and second injection ports 231 and 232 without employing the sub-chamber 234, the front end wall is punctured by the impact of the shot ball S within a short time.

3 and 5, the distributor 230 further includes a dispersion partition 235 partitioning the main chamber 233 and the sub-chamber 234 in the longitudinal direction. The partition 235 has a shape in which the front end 235a and the rear end 235b are bent at an angle of 90 ° and the space between the first and second ejection openings 231 and 232 is divided by 1 / 2, respectively. By means of this dispersion barrier 235. The shot ball S and the compressed air supplied through the flow path 221 are accurately dispersed and injected at the first and second injection ports 231 and 232.

For reference, the short ball S has a property of falling in the direction of gravity by having its own weight, whatever the material, and accordingly, as shown in FIG. 4, a plurality of shot balls S are arranged in the swivel joint flow path 221, the short ball is transported on the bottom of the flow path 221. Accordingly, the amount of the shot ball S injected into the first and second ejection openings 231 and 232 is not constant depending on the positions of the first and second ejection openings. As a result, the first and second nozzles 260 and 260 ' The amount of the shot ball S injected into the coating film is not constant, so that a certain quality is not obtained in removing the old coating film and the corrosion surface.

However, according to the present invention, by using the dispersion barrier rib 235, even if the short ball S flows into the bottom of the flow path 221 by its own weight as shown in FIG. 4, 231) 232 to distribute the shot ball S and the compressed air through the first and second injection ports 231, 232 by an accurate amount.

The shaft 240 is provided on the front side of the distributor 230 and is provided with first and second supports 270 and 270 for supporting the first and second nozzle fastening ends 270 and 270 ' (250) and (250 ').

The first and second nozzles 260 and 260 'are supported on the first and second supports 250 and 250' and are rotated about the center of the pipe by the rotation of the swivel joint 220. At this time, the rotation speed of the first and second nozzles 260 and 260 'may vary depending on the size and the number of channels, but it is preferably about 60 rpm.

FIG. 6 is a view for explaining the first and second nozzle fastening stages for fixing the first and second nozzles of FIG. 2 in an angle-changeable manner, and FIG. 7 is a sectional view of the first nozzle of FIG. And the second nozzle is installed at the first nozzle engagement end.

The first nozzle 260 includes a first nozzle 261 connected to the first injection port 231 and a first nozzle head 262 installed at an end of the first hose 261, The second nozzle 260 'includes a second nozzle 261' connected to the second injection port 232 and a second nozzle head 262 'installed at the end of the second hose 261'.

The first and second nozzle fastening bodies 270 and 270 'support the first and second nozzles 260 and 260' to the first and second supports 250 and 250 ' The fastening ends 270 and 270 'are formed at the injection angle of the first and second nozzle heads 262 and 262' constituting the first and second nozzles 260 and 260 ' The injection angle of the ball S is directed to the opposite side of the air flow direction, and the injection angle can be varied as required.

6, the first and second nozzle fastening ends 270 and 270 'may include a blade 271 installed at each end of the first and second supports 250 and 250' A rotating bracket 272 coupled to the blade 271 so as to rotate about the hinge axis H and supporting the first and second nozzle heads 262 and 262 ' And an angle fixing portion 273 for fixing the rotation angle of the rotation bracket 272 so that the spray angle of the first and second nozzle heads 262 and 262 'is opposite to the air flow direction.

For example, the angle fixing portion 273 may be formed in various ways. For example, the angle fixing portion 273 may include a circumferential guide groove 273a formed in the wing 271 with the same radius at the hinge axis H and an edge of the circumferential guide groove 273a And a fixing bolt 273c penetrating the circumferential guide groove 273a and fastened to the pivot bracket 272. [ As a result, the angle of rotation of the first and second nozzles 262 and 262 'can also be varied in the direction opposite to the airflow, because the rotation angle of the rotation bracket 272 can be varied by the angle fixing portion 273. [ .

By these first and second nozzle fastening ends 270 and 270 '. The injection angle of the shot ball S injected by the compressed air is varied depending on the material and size of the shot ball S to be used or the variables such as the flow rate of the airflow by the air supply ports A and B So that it is possible to effectively carry out the rehabilitation work by the old age pipe. For example, when the particle diameter of the shot ball S is large, the angle fixing portion 273 is formed so as to face the first and second nozzle heads 262 and 262 ' When the diameter of the shot ball S is small, the injection angle of the first and second nozzle heads 262 and 262 'is made smaller with respect to the vertical direction of the pipe.

7, the first nozzle head 262 is installed at the second nozzle fastening end 270 ', and the second nozzle head 262' is installed at the first nozzle fastening end 270 . In this case, even if the positions of the first and second ejection openings 231 and 232 are in the gravity direction or in the opposite gravity direction, the shot ball S having its own weight can be uniformly sprayed by the rotation of the distributor 230.

As described above, the short ball S has a property of falling in the gravity direction by having its own weight. 2, the gravity direction position of the first jetting port 231 and the first nozzle head 262 is the same, and the gravity direction position of the second jetting port 232 and the second nozzle head 262 ' The amount of the shot ball S injected according to the position of the first and second nozzle heads 262 and 262 'due to the rotation of the distributor 230 is not constant, In the removal of the corrosion surface, a certain quality may not be obtained.

However, in the present invention, the first nozzle head 262 is installed at the second nozzle coupling end 270 'and the second nozzle head 262' is installed at the first nozzle coupling end 270, The jetting direction of the first nozzle head 262 and the jetting direction of the second jetting port 231 are opposite to each other with respect to the center (shaft 240) of the second nozzle head 262 ' The injection direction of the one injection opening 231 is reversed so that the shot ball S having its own weight can be sprayed relatively evenly. Accordingly, the amount of the shot ball S injected to the first and second nozzle heads 262 and 262 'becomes constant irrespective of the positions of the first and second nozzle heads, .

The first circular shield 280 is supported on the front shaft 240 of the first and second nozzles 260 and 260 'and has an outer diameter D2 smaller than the inner diameter D1 of the duct P .

The second circular shield 290 is supported by the base body 210 on the rear side of the first and second nozzles 260 and 260 'and has an outer diameter D3 smaller than the inner diameter D1 of the duct P ). The second circular shield 290 is supported on the base body 210 to prevent the load of the second circular shield 290 from being applied to the rotating shaft 240, thereby facilitating long-time driving.

The first circular shield 280 may be configured such that the air of the first flow velocity V1 generated by the air supply ports A and B is supplied to the first circular shield 280 outside the first circular shield 280, 2 Accelerate with air at the flow velocity (V2). Dust containing dust generated in the process of removing the aged coating and the corrosion surface of the shot ball S is quickly exhausted toward the front side of the first circular shield 280 through the outside of the first circular shield 280, So that the heavy short ball S protrudes to the rear side of the first circular shield 280. As a result, the shot ball and the dust are separated from each other naturally, and the shot ball need not be separately air-cleaned.

The second circular shield 290 forms a space between the first circular shields 290 so that the shot ball ejected from the first and second nozzles 260 and 260 ' So that the shot ball S can be easily recovered.

The flow of air passing through the outside of the second circular shield 290 is accelerated to generate a swirling flow between the first and second circular shields 280 and 290. By this swirling flow, The effect can be enhanced and the dust can be effectively separated, and the separated dust escapes through the outside of the first circular shield 280.

8 is a view for explaining a configuration of the first and second circular shields shown in FIG.

The first circular shield 280 has an outer diameter D2 smaller than the inner diameter D1 of the duct P and includes a first inner shield 281 fixed to the shaft 240, And a first outer shield 282 made of a flexible material and provided on an outer circumferential surface of the first outer shield 281. The first circular shield 280 narrows the space between the ducts P and induces the venturi action so that the flow of air escaping between the first circular shield 280 and the duct P is accelerated. That is, the first circular shield 280 is configured such that the air flow of the first flow velocity V1 flowing through the duct P is transmitted to the outside of the first circular shield 280 at a second flow velocity V2 In the airflow direction.

The second circular shield 290 has an outer diameter D3 smaller than the inner diameter D1 of the duct P and includes a second inner shield 291 fixed to the base body 210, And an outer shield 292 made of a flexible material and provided on the outer circumferential surface of the shield 291. The first circular shield 290 forms a space separated from the first circular shield 280 with the first and second nozzles 260 and 260 'therebetween, The flow of air escaping between the second circular shield 290 and the duct P is accelerated and a strong whirl phenomenon occurs between the first circular shield 280 and the first circular shield 280. [ Accordingly, by separating the shot ball from the dust generated in the process of removing the old paint film and the corrosion surface, and further dropping the dropping space of the shot ball that protrudes after colliding with the inner circumferential surface of the pipe P, Thereby facilitating recovery.

The first and second inner shields 281 and 291 are circular in shape and the first and second outer shields 182 and 292 are formed in a ring shape The first and second outer shields 282 and 292 are made of a flexible material. Accordingly, the diameter of the first and second circular shields 280 and 290 may be changed when a pressure is externally applied for some reason.

A pipe (P) such as a water pipe is buried for more than several decades. If a geologic change occurs or a vehicle of a heavy weight travels to the upper side of the pipe (P), the diameter of the pipe (P) may be changed. For example, a pipe with a diameter of 2 m may have an inner diameter of 1,7 m in some sections after several decades. In this case, the first and second outer shields 282 and 292 can be deformed, and as a result, the outer diameters D2 and D3 of the first and second circular shields 280 and 290 can be varied, It is possible to pass through the duct of the inner diameter.

As described above, according to the present invention, in the blasting process for removing the aged coating film and the corrosive surface while moving inside the pipeline P, the dust-containing dust is not mixed with the shot ball, and the process of separating the dust and the shot ball is omitted And thus, the pipe rehabilitation process can be rapidly performed.

Also, since the short ball mainly falls in the space between the first and second circular shields 280 and 290, the recovery of the shot ball can be facilitated.

The subchamber 234 includes a sub-chamber 234 formed inside the distributor 230 so as to be opposed to the main chamber 233 with reference to an extension line connecting the first and second injection ports 231 and 232, Is prevented from moving to the inside of the sub-chamber 234, thereby preventing the front end side of the distributor from being damaged.

The first nozzle head 262 is attached to the second nozzle fastening end 270 'and the second nozzle head 262' is fastened to the first nozzle fastening end 270 The shot ball can be uniformly sprayed on the upper surface or the lower surface of the inner circumferential surface of the pipe P in spite of its own weight.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

100 ... short ball tank 200 ... blaster
210: base body 211, 212: first and second connectors
220 ... Swivel joint 221 ... Euro
230 ... Distributor 231, 232 ... First and second nozzles
233 ... main chamber 234 ... sub chamber
235 ... distributed barrier ribs 235a ... front end
235b ... rear end 240 ... shaft
250, 250 '... first and second supports 260, 260' ... first and second nozzles
261, 261 '... first and second hoses 262, 262' ... first and second nozzle heads
270, 270 '... first and second nozzle fastening ends 271 ... wing
272 ... rotation bracket 273, ..., angle fixing portion
273a ... circumferential guide groove 273b ... friction
273c ... fixing bolt 280 ... first circular shield
281 ... first inner shield 282 ... first outer shield
290 ... second circular shield 291 ... second inner shield
292 ... second outer shield

Claims (8)

A short ball tank 100 for accommodating fine ball balls and a short ball tank 100 for supplying a short ball supplied from the short ball tank 100. [ And a blaster (200) for spraying the ball to the inner circumferential surface of the pipe (P) by using high-pressure compressed air;
The blaster (200)
A base body 210 mounted on a carriage M that travels in the pipeline P and to which a short ball hose S1 for supplying the short ball and an air hose S2 for supplying compressed air are connected;
A swivel joint 220 installed to be rotatable on the front side of the base body 210;
A distributor 230 fastened to the swivel joint 220 and having first and second jetting ports 231 and 232 formed symmetrically with respect to the center of the conduit;
A shaft 240 extending toward the front side of the distributor 230;
First and second supports 250 and 250 'supported in a vertical direction to the shaft 240;
First and second nozzles 260 and 260 'connected to the first and second injection ports 231 and 232 to inject the shot ball into the inner circumferential surface of the pipe P;
A first and a second nozzle fastening bodies 270 and 270 'for fastening the first and second nozzles 260 and 260' to the first and second supports 250 and 250 '; And
And a second circular shield having an outer diameter D2 smaller than an inner diameter D1 of the pipe P supported by the shaft 240 on the front side of the first and second nozzles 260 and 260 '(280);
The distributor 230 includes a main chamber 233 for communicating the flow path 221 of the swivel joint with the first and second ejection ports 231 and 232 and the main chamber 233 for connecting the first and second ejection ports 231 and 232 And a partition wall 235 partitioning the main chamber 233 and the sub-chamber 234 in the longitudinal direction of the sub-chamber 234. The sub-chamber 234 is formed to be opposed to the main chamber 233, Include;
The front end 235a of the partition wall 235 has a shape in which the front end 235a and the rear end 235b are bent by 90 degrees. 2. The blasting apparatus according to claim 1, delete delete delete delete A short ball tank 100 for accommodating fine ball balls and a short ball tank 100 for supplying a short ball supplied from the short ball tank 100. [ And a blaster (200) for spraying the ball to the inner circumferential surface of the pipe (P) by using high-pressure compressed air;
The blaster (200)
A base body 210 mounted on a carriage M that travels in the pipeline P and to which a short ball hose S1 for supplying the short ball and an air hose S2 for supplying compressed air are connected;
A swivel joint 220 installed to be rotatable on the front side of the base body 210;
A distributor 230 fastened to the swivel joint 220 and having first and second jetting ports 231 and 232 formed symmetrically with respect to the center of the conduit;
A shaft 240 extending toward the front side of the distributor 230;
First and second supports 250 and 250 'supported in a vertical direction to the shaft 240;
First and second nozzles 260 and 260 'connected to the first and second injection ports 231 and 232 to inject the shot ball into the inner circumferential surface of the pipe P;
A first and a second nozzle fastening bodies 270 and 270 'for fastening the first and second nozzles 260 and 260' to the first and second supports 250 and 250 '; And
And a second circular shield having an outer diameter D2 smaller than an inner diameter D1 of the pipe P supported by the shaft 240 on the front side of the first and second nozzles 260 and 260 '(280);
The first and second nozzle fastening bodies 270 and 270 ' The first and second nozzle heads 262 and 262 'constituting the first and second nozzles 260 and 260' are supported so as to face the opposite sides of the air flow direction;
The first and second nozzle assembling steps 270 and 270 'include wings 271 provided at the ends of the first and second supports 250 and 250' A rotation bracket 272 which is coupled to be rotated about the rotation axis H and supports the first and second nozzle heads 262 and 262 'and a rotation bracket 272 which is installed between the blades 271 and the rotation bracket 272 And an angle fixing portion 273 for fixing the rotation angle of the rotation bracket 272 so that the spray angle of the first and second nozzle heads 262 and 262 'is opposite to the air flow direction Features blasting equipment for pipe rehabilitation. A short ball tank 100 for accommodating fine ball balls and a short ball tank 100 for supplying a short ball supplied from the short ball tank 100. [ And a blaster (200) for spraying the ball to the inner circumferential surface of the pipe (P) by using high-pressure compressed air;
The blaster (200)
A base body 210 mounted on a carriage M that travels in the pipeline P and to which a short ball hose S1 for supplying the short ball and an air hose S2 for supplying compressed air are connected;
A swivel joint 220 installed to be rotatable on the front side of the base body 210;
A distributor 230 fastened to the swivel joint 220 and having first and second jetting ports 231 and 232 formed symmetrically with respect to the center of the conduit;
A shaft 240 extending toward the front side of the distributor 230;
First and second supports 250 and 250 'supported in a vertical direction to the shaft 240;
First and second nozzles 260 and 260 'connected to the first and second injection ports 231 and 232 to inject the shot ball into the inner circumferential surface of the pipe P;
A first and a second nozzle fastening bodies 270 and 270 'for fastening the first and second nozzles 260 and 260' to the first and second supports 250 and 250 '; And
And a second circular shield having an outer diameter D2 smaller than an inner diameter D1 of the pipe P supported by the shaft 240 on the front side of the first and second nozzles 260 and 260 '(280);
The first nozzle 260 includes a first hose 261 connected to the first injection port 231 and a first nozzle head 262 installed at an end of the first hose 261;
The second nozzle 260 'includes a second hose 261' connected to the second injection port 232 and a second nozzle head 262 'installed at an end of the second hose 261'Include;
Characterized in that the first nozzle head (262) is installed at the second nozzle fastening end (270 ') and the second nozzle head (262') is installed at the first nozzle fastening end (270) Blasting equipment for pipeline rehabilitation. The method according to claim 1,
And a second circular shape having an outer diameter D3 smaller than the inner diameter D1 of the pipe P supported on the base body 210 on the rear side of the first and second nozzles 260 and 260 ' Further comprising a shield (290).

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