KR820000831B1 - Apparatus of coating the inner surface of a pipe for renewing water- pipe - Google Patents

Abstract

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Description

Inner surface coating machine for existing water pipe rehabilitation

The figure shows an embodiment of the present invention pipe rehabilitation pipe coating machine,

1 to 5 is a process chart using the inner surface paint coater for facility water pipe rehabilitation of the present invention.

6 is a longitudinal cross-sectional view of a crushed body used in the process shown in FIG.

7 is a side cross-sectional view of the main part of the sofa used in the process shown in FIG.

8 is a perspective view showing another embodiment of the head when brushing.

9 is a longitudinal sectional view of principal parts of the apparatus used in the process shown in FIG.

10 is a cross-sectional view taken along the line (a)-(a) of FIG.

FIG. 11 is a plan view of a painting apparatus used for the process shown in FIG.

FIG. 12 is an enlarged plan view of main parts of the apparatus shown in FIG.

13 is a partially cutaway side view showing a partially cut away view.

FIG. 14 is a side view in which only the outer part of the sprayer, which is a major component of the coating device, is terminated.

Fig. 15 is a perspective view of the mixing apparatus of the sprayer.

16 is a longitudinal cross-sectional view of the connector.

17 is an enlarged cross-sectional view taken along the line (b)-(b) of FIG.

18 is a cross-sectional view taken along the line (c)-(c) of FIG.

FIG. 19 is a cross-sectional view taken along the line (d)-(d) of FIG. 17. FIG.

20 is a longitudinal sectional view showing an exploded state of the sprayer.

21 is a cross-sectional view taken along the line (e)-(e) of FIG.

FIG. 22 is a cross-sectional view taken along the line (f)-(f) of FIG. 20. FIG.

23 is a longitudinal sectional view in which the cowling bearing part of the sprayer is disassembled.

The present invention relates to an internal pipe coating machine for rehabilitation of existing water pipes.

The water pipe has rust, scale, and foreign matters attached to the inner surface of the pipe as the number of years of use increases, so that the inner diameter of the pipe is narrowed, resulting in a large flow resistance, and the disadvantages of reducing the amount of water flowing therethrough and various damages caused by this.

For this reason, it is necessary to replace water pipes regularly or to rehabilitate water pipes by removing rust, scale, and foreign matters attached to the inside of the water pipes. The former method requires large-scale construction for a long time and It is not easy and simple to implement because it requires huge fiscal expenditure.

Therefore, rehabilitation of existing water pipes, which can be carried out relatively simply and at a low cost, is often performed.

However, even in such a rehabilitation work, there is a restriction that the construction must be completed in a short time because it is necessary to stop the water supply to the construction area or to block traffic during construction.

Therefore, in addition to the short construction period and the complete rehabilitation of the water pipes, it is desirable to develop a means to prevent rust, scale, and foreign matter from adhering to the inner surface of the water pipe once it has been renovated. have.

The present invention fully satisfies these requirements, shortens the construction period, completely removes rust, scale, and foreign substances attached to the inner surface of the existing water pipes, and promotes complete rehabilitation of the water pipes. In order to prevent the rust, scale and the like from sticking to the water pipes again by lining the anti-rust synthetic resin paints for a long time, the water supply to the water pipes of the area is stopped and the water supply is stopped. The process of cutting water pipes buried in the area according to the standard for each length that is straightly piped as possible, and spraying high pressure water from the cutting opening end of the water pipe of each cut section to the other cutting opening end. A crushed body having an injection hole is used to drive the inside of the pipe by using reaction force of high pressure injection of water in the injection hole. The process of scraping and cleaning rust and dirt on the inner surface of the pipe by the pressure of the sprayed water and the crushed body, and by pulling the sofa body in the pipe, and by the high pressure water injection and injection in the pipe, Attaching to the inner surface of the tube The process of adjusting the surface of the inner surface of the pipe by adjusting the thickness of the rust or dirt remaining, and connecting the nozzle body to the opening of the first stage of the tube, Pressure water is injected, and the pressure water is ejected in the opposite direction to the connection portion with the water pipe as described above, and at that time, air or the other end of the water pipe is opened by the negative pressure generated in the flow passage in the nozzle body. Blowing a mixture of air and heating air, causing air flow in the water pipe, drying the water pipe inner wall against this air flow, air motor The coating base is pulled from the inside of the tube to move the inside of the tube in a floating state, and is composed of a main liquid and a curing liquid mainly composed of an anti-rust synthetic resin. Spray spray scattering using centrifugal force accompanying the operation of the bower to apply to the inner surface of the tube, drying the paint applied to the inner surface of the tube, and connecting again to allow the water to flow to the stopped water pipe. A refining machine for use in the process of lining rust-resistant synthetic resins on the inner surface of water pipes in rehabilitation of existing water pipes, characterized in that the two-component synthetic resins that are rapidly cured by mixing a main liquid and a curing liquid. The paint can be mixed immediately before application and spray applied quickly, And it can also be reliably formed by a thin coating layer. Mixing and stirring of two-liquid synthetic resin coating material and curing liquid can be performed without using power, and the structure is simple, compact, and after use of residual paint that is hardened and adhered to the coating machine by use. It is easy to remove, clean or inspect and replace the air motor on site. It can be bent or inserted into a curved pipe and moved, and it is easy to paint not only straight pipe but also the inside of the curved pipe. To provide a sprayer that can make it.

Hereinafter, with reference to the embodiments of the accompanying drawings in order to deepen the understanding of the present invention will be described.

In doing rehabilitation work of existing water pipe, we stop water supply to water pipe to try to rebuild of construction conduct area first. Work blood (B) is excavated at intervals of about 100 m on the ground where the water pipe (A) is embedded, and the water pipe (A) is exposed to the work blood (B) portion, and the water pipe (A) of the exposed portion Cut to a suitable length, for example 60 cm.

Therefore, the buried water pipe is cut to about 100 m in length. In addition, this length of 100 m is not limited, The length can be changed according to the piping situation of a water pipe, the road situation, etc.

As described above, a guide roller 100 is attached to one cutting opening end of the water pipe A cut to a length of 100 m, for example, and guided to the guide roller 100 to guide the crushed body 101 to the water pipe ( A) Insert it into.

The shredding body 101 is made from a continuous body portion 104 which is continuous through a hollow bullet head 102 and a hollow neck 103 cut behind, as shown in FIG. ), There is a suitable number of small diameter injection holes 105 inclined toward the outer rear at equal intervals in the circumferential direction.

The connector 107 fixed to the tip of the water supply pipe 106 is screwed into the trunk portion 104 of the crushing body 101, whereby the crushing body 101 is connected to the water supply pipe 106.

The fastening of the crush body 104 and the connector 107 is screwed into the inner circumference of the fuselage 104 and from the outer circumference of the connector 107 as shown in FIG. 6 when the lower body 101 is small. Although 108 may be provided and the two screws may be directly screwed together, the shredding body 101 may be different in size depending on the diameter of the pipe A to be regenerated, and of course, large and heavy for a large diameter pipe A. Shreds are used.

When the shredding body 101 is large in this way, water is not leaked to the fuselage part 104, and a nut is made of a rotating material, and the connector 107 at the tip of the nut and the water supply pipe 106 is rotated by the nut. Is designed to be screwed in to simplify the installation of the crushed body 101 to the water supply pipe 106.

In addition, the water supply pipe 106 uses a pipe having sufficient flexibility and sufficient strength, and the proximal end thereof is connected to the seizure c.

Then, when the ultra high pressure water is supplied to the shredding body 101 through the water supply pipe 106 through the water injector c, the shredding body 101 injects the door obliquely backwards from the injection hole 105 by the reaction force. It moves forward in the pipe (A), and the rust, scale, etc. attached to the inner surface of the pipe (A) by the forward pressure of the shredding body 101 and the strong jet water ejected from the injection hole 105 In addition to erecting foreign matters from the inner wall of the pipe, these peeled rust lumps are seized to the rear by the sprayed water and discharged to the outside of the pipe (A).

The condenser C is mounted on an automobile so as to be free to move, and the water supply pipe 106 is wound on the rotating drum 100 (FIG. 1) to be properly released in response to the advancement of the crushing body 101. .

The water to be supplied can be withdrawn from the water fountain closest to the construction site.

The washing step by the crushed body 101 can be appropriately repeated according to the degree of damage in the pipe A.

That is, by rotating the rotating drum 100 in the winding direction, the shredding body 101 can be retracted and simply returned to the original position, and the work can be started again at that position.

In this process, rust, scale, and foreign matter attached to the inner surface of the pipe are crushed and removed by the impact pressure of the crushed body and the injection of the high-pressure jetted water, and washed out of the pipe by the jetted water. There is no fear that the part will be damaged or the fountain will be blocked by the removed foreign object.

In addition, since the crushed body frequently moves inside the pipe due to the reaction force of the high pressure jet sprayed from the injection hole, it does not require any other means for moving it, for example, a rope for traction, and the like. Since it is not necessary, the effect of shortening construction time is great.

By this cleaning process, most of the rust, scale, foreign matter, etc. adhered to the inner wall of the pipe can be removed, but the special material or the very hardly adhered ones of the deposits are not removed but remain attached to the inner surface of the pipe.

It is necessary to completely remove this, since even if lining mentioned later with such a residue adhere | attached on the inside wall of a pipe | tube will cause peeling of a coating.

Therefore, following the cleaning process mentioned above, the sofa body 111 is tractionally moved in the pipe, the residue is knocked off, and the process of adjusting the possession of the inner surface of the pipe is performed.

The sofa body 111 is composed of a turbine 112 and the bushing head 113 rotated by the turbine 112, the turbine 112 is shown in Figure 7 to rotate the spinneret 130a The outer cylinder 131 integrally formed with the bearing portion 131 of the bearing and the pressure water guide ring 132 fixed to the inner circumference of the outer cylinder 131, and is located immediately before the guide ring 132, the key ( 134) and a cap 136 for fastening the guide ring 132 into the outer cylinder 131 by screwing the wing ring 135 fixed to the back of the outer cylinder 131, and the pressure water guide ring ( 132 has a plurality of guides 137 inclined inclined to give a direction to the pressure water introduced into the outer cylinder through the hose 106, and the guide 137 in the outer peripheral portion of the wing ring 135 A pressure water tool 138 is inclined to be inclined so as to be substantially orthogonal to the guide tool 137 so as to receive the pressure water guided by.

The rotating shaft 130 is rotatably supported in the above-mentioned hydraulic turbine 112, and also has a rotating shaft 130a having a vane ring 135 and a flexible shaft screwed to the tip of the rotating shaft 130a. The soluble side is formed by, for example, winding a steel wire to an appropriate length and welding and attaching nuts 139 and 139 to both ends thereof. 130c) attaches detachable head 113 freely.

The brush head 113 may be a steel wire brush as shown in FIG. 7, or may be a governor blade as shown in FIG. 8.

The outer diameter of the brush head 113 is about the same as the diameter or slightly smaller than the diameter.

In the sofa 111, in the preceding step, the turbine 112 is replaced with the shredding body 101 in the state where the shredding body 101 has advanced from the insertion side cutting opening end of the pipe A to the other end. It is connected to the connector 107 of the 106.

The rotary drum 100 is rotated in the rewinding direction of the water supply pipe while flowing the water, which has been increased to ultra high pressure by the hydraulic press (c), to the rewinding direction of the water supply pipe, thereby winding the water supply pipe 106 to pipe the sofa body 111. Towing in (A).

Then, the turbine 112 rotates by the ultra-high pressure water supplied to the sofa body 111 via the water supply pipe 106, and the bushing head 113 is rotated, and the inner surface of this bushing head 113 is rotated. Scrape off dirt and foreign matter remaining on the inner surface by strong contact rotation of the pipe, adjust the inner surface to smooth surface, and at the same time, wash foreign substances scraped and dropped by the water sprayed inside the tube to the outside. Throw it away.

After the end of this step, instead of the sofa body 111, the shredding body 101 is again mounted on the tip of the water supply pipe 106, and the shredding body 101 is frequently introduced into the pipe as described in the above-mentioned step, and the inside of the pipe is rebuilt. After cleaning, completely remove any foreign matters remaining in the pipe, and then clean the inside of the pipe if necessary according to the situation in the pipe.

Wiping of the inner surface of the tube is performed by using a suitable tool 114 such as a sponge, a mop, or the like.

That is, in the re-cleaning process in the pipe, instead of the crushed body 101 advanced to the tip of the pipe, the water pipe 10 is equipped with a mop 114, and the water pipe 101 is wound up without returning water. The mop 114 is moved in the tube to wipe the inner surface of the tube.

However, in the example shown in the figure, the mop 114 is not attached to the water supply pipe 106, and is attached to the wire-off off 115, and it is set as the structure which pulls this as retractor D. As shown in FIG.

The inner surface of the tube is completely clean by this process, and miscellaneous goods and the like are completely absent.

As described above, this wiping operation is a work performed as needed. The inner surface of the pipe is completely clean even if this operation is not performed, and it is not necessary to carry out the washing when no foreign matter or the like is present.

When the wiping operation is carried out, the wire low-off 115 is passed through the tube A as it is, and moved to the next drying step. When the wiping operation is not performed, the shredding body 101 advanced to the other end of the tube. The wire off is connected to the wire) and the pulverized body 101 is pulled back to pull the wire off and into the pipe A to move to the next step.

In other words, the inside of the pipe is dried as it is while the wire low-off is inserted into the pipe.

Next, this drying process is demonstrated from the apparatus E used here first (FIG. 4).

The apparatus E is a flexible hose 117 in which the high pressure water jet nozzle body 116 is opened in the middle portion, and a water presser C for supplying ultra high pressure water to the nozzle body 116 via the water supply pipe 106. The water supply pipe 106 and the water condenser C are used as they are.

The high-pressure water jet nozzle body 116 is screwed into the suction pipe 120 and the sorting pipe 121 made of metal on the trumpet-shaped flow passage 118, 119 extending outward as shown in FIG. And forming a constriction portion 122 in the inner center thereof, and forming an annular passage 123 on the outer periphery of the constriction portion 122, and spraying nozzles over the passage 123 and the branch pipe-side flow passage 119. (124) (124) ... at the right intervals.

In addition, the annular passage 123 protrudes from the outside of the speech tube 125, and detachably connects the water supply pipe 106 from the seizure C to the speech tube 125.

The spray nozzles 124 and 124 are inclined at a predetermined angle with respect to the center line of the flow passage 119 so that their extension lines do not cross at one point in front of the flow passage 119, and the nozzle At the time of spraying the pressure water in (124) (124) ..., the pressure water is sprayed by giving a certain rotational direction, and the flow rate at which the pressure water flows into the flow passage 119 is increased to increase the flow rate. The suction force of 120) is increased.

Moreover, the flexible hose 117 of suitable length is protruded to the opening end of the suction pipe 120 side and the dividing pipe 121 side of the said nozzle body 116, respectively.

Then, the tip of the flexible hose 117 attached to the high-pressure spray nozzle body 116 is connected to one end of the water pipe A which has been repaired into the working blood B ', and the opposite hose is connected. Guide the end to a road drain near the site (F) or other suitable drainage system.

Then, the tip of the water supply pipe of the condenser (C) used in the pipe cleaning operation is connected to the connecting pipe (125) of the nozzle body 116, and then the ultra high pressure water of about 250 Kg / cm 2 is returned from the condenser (C). This pressure water is pumped from the water supply pipe 106 to the annular passage 123 via the speech pipe 120.

The pressure water pumped into the annular passage 123 is given a rotational direction at an angle by the injection nozzles 124 and 124. It is discharged to the end of the flexible hose 117.

At this time, negative pressure is generated in the flow paths 118 and 119 in the nozzle body 116, and air is supplied from the other end of the water pipe through the flexible hose 117 and the water pipe A, which are addressed to the front end of the suction pipe 120. It strongly inhales and causes a flow of air in the water pipe A, and by this air flow, the moisture adhering to the inner wall surface of the water pipe A can be completely dried out.

At this time, as shown in FIG. 4, the tip of the hose 126 of the hot air generator G is connected to the other end opening A 'of the pipe A, whereby hot air is fed into the pipe A. In this case, the drying step can shorten the time extremely, but the hose 126 of the hot air generator (G) does not necessarily need to be connected to the pipe (A), but may only be inserted into the working blood (B). .

In the extreme, even if the hot air generator (G) is not used, the implementation of this process is not impossible at all.

In other words, it is possible to dry the inner surface of the tube quickly enough even with air only.

This step can significantly shorten the time required for drying the inner surface by adopting a method of causing air flow in the pipe as described above.

For example, when the tip of the hose 126 of the hot air generator (G) is inserted into the working blood (B) and the hot air is fed into the blood (B), the device (E) having the high-pressure water jetting nozzle body 116 is provided. By adopting a method of causing air flow in the pipe by force, and forcibly drawing a mixture with the heated air, if the drying time of the inner wall surface of the water pipe with a diameter of 50 to 100 mm is not adopted in such a manner, about 2 You can shorten it by about 10 to 15 minutes for what was taking time.

After completion of the drying process of the inner tube surface, in order to prevent the adhesion of rust, scale, foreign matters, etc. on the inner surface of the tube again, an anti-corrosive synthetic resin road is applied to the inner tube surface.

This rust-resistant synthetic resin is composed of a main liquid and an curing liquid made of an epoxy resin, and sprayed on the inner surface of the tube in a state in which the nutrient solution is mixed by a coating apparatus as described below.

That is, the coating device H is a coating machine (a) having an air motor 10 (FIG. 18) as shown in FIG. 11, and a paint supply device (b) for supplying paint to the coating machine (a). , Compressed air supply device (c) for supplying compressed air to the sprayer (a), the traction device (d) to pull the coating paper (a), the sprayer (a) is a casing (1) small diameter casing (1) ).

As shown in FIG. 20, the casing 1 has a built-in motor chamber 2 at the center thereof so as to open from the front of the casing. The motor chamber 2 opens the inlet and the outlet together with the casing 1 back. It is in contact with the compressed air passage 3 installed in the casing (1).

The casing 1 is provided with a paint passage 4 which penetrates it in the axial direction. Several passages are arranged in series in this passage 4, and the trailing edge and the leading edge of adjacent small pieces are alternately applied. The stirring element 5 joined in 10 shape at an angle is inserted and placed (Fig. 17).

In addition, the mixing case 36 is engaged with the casing 1 via the flexible wire 35 at the rear thereof, and the lid 6 is stuck with the screw 7 on the front surface thereof.

The lid 6 has a rotation shaft insertion hole 8 concentrically established with the motor chamber 2 and a nozzle connecting hole 9 concentrically symmetric with the paint material 4.

The mixing case 36 is provided with a mixing chamber 37 in which an inlet is opened at the rear of the case and an outlet is opened at the front, and the case 36 is axially penetrated separately from the mixing chamber 37. A compressed air passage 38 is installed, and the outlet of the mixing chamber 37 is at the inlet of the paint passage 4 of the casing 1, and the outlet of the compressed air passage 38 is the compressed air passage of the casing 1. The inlet of the furnace 3 is contacted as flexible tubing 39, 39 ′, respectively.

The mixing chamber 37 has a diameter larger than that of the inlet and the outlet, and the inlet and outlet have the same stirring element (not shown) as that provided in the paint passage 4 of the casing 1. Equip.

In addition, one opening of the connection port 70 formed in a tertiary tube shape is inserted into the mixing case 36 at the inlet of the mixing chamber 37, and the other two openings of the connection port 70 are behind the paint supply device. The inlet of the liquid supply pipe 48 and the curing liquid supply pipe 49 of (b) and the inlet of the compressed air passage 38 are attached to and detached from each other at the tip of the air hose 60 of the compressed air supply device c. It connects through the possible connection port e.

The connector e is made of a magnetic member 71 and a male member 72, as shown in FIG. 16, and is connected to the mixing case 36 in which the magnetic member 71 is electric. Two openings of the attached tertiary tubular connector 70 and the inlet of the compressed air passage 38 of the mixing case 36, and the male member 72 is hardened with the liquid supply pipe 48 of the paint supply device b. It is attached to the air supply 60 of the liquid supply pipe 49, and the compressed air supply device (c), respectively, the male member 72 is inserted into the magnetic member 71, the mixing case 36 and the paint supply device ( b) The compressed air supply device (c) is connected.

The magnetic member 71 and the male member 72 have a bowl 74 accommodated in a ball 73 formed on the main surface of the magnetic member 71 by being pressed by the pressing metal ball 75 to the inner surface of the magnetic member 71. It protrudes and engages by fitting to the request | requirement 76 provided in the outer periphery of the male member 72. As shown in FIG.

The pressing metal sphere (75) is formed in an annular shape, and is wound around the magnetic member (71) so as to move laterally, and at all times the bowl (74) is pressed by the spring (77) and the male member ( While retained in the position engaged with the request 76 of 72), the position can be made to simply slip slightly by circulating in the axial direction of the magnetic member against the force of the spring.

Accordingly, the engagement of the male members 71 and 72 via the bowl 74 is easily released as the position of the pressing metal sphere is slightly slipped. In the male members 71 and 72, the valves 78 and 80 configured to open the passage 78 penetrating in the axial direction in the male coupled state, and to close in the male separated state, respectively. It is built in.

Numeral 10 denotes an air motor housed in the motor chamber 2 of the casing 1 described above, numeral 11 denotes a cylinder case, numeral 12 a cylinder, numeral 13 a rotor, and numeral 14 a braid. The air motor 10 divides the compressed air passage 3 into an air supply shaft 3a in contact with the inlet and an exhaust shaft 3b in contact with the outlet by being equipped in the motor chamber 2. The compressed air entered into the compressed air passage 3 at the inlet is passed through the cylinder case 11 of the air motor 10 and the vent holes 15, 15 ', 16 and 16' of the cylinder 12. In this process, the compressed air is impinged on the braid 14 to rotate the rotor 13, and a high-speed rotational force is applied to the motor shaft 17 installed in the rotor.

Adopting the air motor 10 as a drive source as described above does not require a complicated structure such as electrical wiring, as compared to using an electric motor or the like as a drive source, it is less troublesome, and the size of the sprayer a can be reduced. As for the downsizing of the coating machine (a), as described above, the mixing device is provided on the outside of the casing separately from the casing, and is further embodied better.

In addition, the downsizing of the coating machine a has a very large effect in passing through the bent portion and the curved portion of the tube.

The motor shaft 17 extends into the rotation shaft insertion hole 8 of the lid 6 of the casing 1. The air motor 10 is attached to the lid 6 at the position 18 and to the bottom of the motor chamber at the position 19.

Therefore, the air motor 10 can be taken out of the motor room 2 by releasing the screw 7 and slowing down each screwing part 118,19.

Accordingly, when a malfunction of the modulator is found by trial operation before construction, it can be replaced on the spot in the field on the spot, and it is possible to take time to repair or replace the motor, or to malfunction of the motor during construction. It is possible to avoid construction failures, reconstructions, and the like, resulting in shortening of construction time and extremely convenient for maintenance after completion of construction.

Reference numeral 20 denotes a cowling, which is formed in a user cylindrical shape, an shaft mounting hole 21 is formed in the center of the bottom surface thereof, and the cowling shaft 22 is inserted into and fixed to the ball.

Moreover, the cowling 20 arranges and distributes many small holes 23 uniformly on the main surface.

The cowling shaft 22 has a screw 24 formed at its distal end, and the bottom surface of the cowling 20 is sandwiched from the front and the rear surface by two nuts 25 and 26 attached to the screw 24. (20).

The cowling shaft 22 is connected to the motor shaft 17 of the air motor 10 at the rear end thereof.

The shafts 17 and 22 are formed with clutches 27 engaged with each other.

In addition, the bearing 28 is press-fitted in the middle part of the cowling shaft 22, and the cowling shaft 22 is rotatably supported by the bearing 29 which serves as a cover via this bearing 28. As shown in FIG.

In addition, the nut 26 located inside the cowling 20 described above is fitted to the shaft hole 30 of the bearing 29.

The bearing 29 is screwed in at the position 31 in the lid 6.

Therefore, the cowling shaft 22 can be removed by releasing the nuts 25 and 26 to remove the cowling 20 and releasing the nut 29 between the bearing 29 and the lid 6Z.

Thereby, it is very easy to carry out removal and cleaning of the coating material which penetrates inside from the tip of the bearing 29 during use and is hardened and adhered to the part after use, and it is convenient.

32 is an injection nozzle, which is formed by laying several injection holes 33 arranged in a row in the axial direction on the main surface of the capillary which has the tip closed, and in the nozzle mounting hole 9 of the casing cover 6. The opening shaft mounting portion is mounted so as to protrude into the cowling 20, and the injection hole 33 faces the inner surface of the cowling 20 in the direction of rotation of the cowling 20.

34 consists of three to several elastic pieces attached to the outer circumferential surfaces of the casing 1 and the mixing case 36 at appropriate intervals along the circumferential direction as supporting angles, and each elastic piece has one casing at one end. (1) The back end is obliquely attached, and the other end is extended obliquely outward toward the front of the casing (1). The expansion angle of each elastic piece is the same.

This support angle 34 is detachable and can correspond to a pipe with a different diameter by replacing it with a different length.

The support angle 34 maintains the painter a at all times in the center of the pipe A, and maintains the paint in spite of the sway caused by the progress and traction caused by the drive of the air motor 10. It is very useful to apply uniformly on the inside of the tube at all times.

In addition, the sprayer (a) of the above-described embodiment holds a mixing device composed of a mixing case 36 in which a mixing chamber 37 is installed in order to facilitate mixing of the pouring liquid and the curing liquid. Instead of one mixing case, it is possible to use flexible tubing which has a certain length and is equipped with a stirring element inside.

In such a case, one end of this tubing is connected to the inlet of the paint passage of the casing, and a third tubular connection port is attached to the other end.

Of course, the wire-off for connecting the casing and the mixing device becomes unnecessary, and the air hose of the compressed air supply device is directly connected to the inlet of the compressed air passage of the casing.

Further, it is preferable to attach a purifier 81 such as a filter to the compressed air passages 3 and 38 of the casing 1 or the mixing case 36 to the coating machine a. The purifier 81 such as a filter removes fine dirt and dust contained in the compressed air, protects the air motor 10 from them, and contains the air in the exhaust air by rotating the motor 10. Dirt and dust are attached to the unpainted part of the inner surface of the pipe (A) to prevent paint peeling.

In addition, the purification apparatus 81 is provided in the compressed air path 38 exit part of the mixing case 36 in the example of drawing, but it is also installed in the supply side of the compressed air path 3 of the casing 1, or it is exhaust side. It may be installed in.

If it is installed on the exhaust side, even the grease blown by the air motor 10 can be removed, and the arrival of the paint on the inner surface of the pipe A can be more reliably expected.

Next, the paint supply device (b) and the compressed air supply device (c) will be described with reference to Figs.

The coating material is composed of a coating liquid and a curing liquid, and a two-component synthetic resin which is cured by mixing both is used, and the liquid and the curing liquid are stored in separate liquid tanks 42 and 43, respectively.

The liquid tanks 42 and 43 are equipped with the agitator 46 provided with the stirring blade 45 which rotates respectively with the drive of the motor 44, and is always stirring paint.

The pouring liquid and the hardening liquid in the liquid tanks 42 and 43 are respectively sent to the paint supply pipes 48 and 49 for pouring liquid and hardening liquid by the airless pump 47 and 47 ', respectively.

The paint supply pipes 48 and 49 are soluble hoses, one end of which is connected to the liquid tanks 42 and 43 via the airless pump 47 and the other end to the sprayer A. The rotating drum 50 is interposed.

The rotary drum 50 has two paint pipes 53 and 54 which have a shaft 51 hollowed out and open from the one end of the shaft 51 to the drum dynamic portion 52 through the shaft 51. One air pipe 55 is formed, and the middle portion of the paint supply pipes 48 and 49 is wound around the drum in the middle by contacting the pipes 53 and 54.

In addition, the rotating drum 50 is supported by the shaft 51 is supported on the bearing to rotate, and pull the front end of the paint conveying pipe (48, 49) can rotate to export the paint conveying pipe (48, 49) from time to time have.

In addition, the rotation shaft 51 is connected to the shaft 57 driven by the motor 56, and rotates by operating in accordance with the rotation of the shaft (57).

That is, the traction apparatus d of the coating machine a is comprised by these.

This rotation is a rotation in the direction in which the paint supply pipes 48 and 49 are wound, and the rotation with the shaft 57 released by the clutch mechanism 58 is released when the rotation of the coating supply pipes 48 and 49 is rotated.

The compressed air supply device (c) is composed of a compressor (59) and an air hose (60) connected thereto. The air hose (60) is the same as the paint supply pipe (48) (49). 50)

That is, the intermediate part of the air hose 60 interposes the air pipe 55 in the shaft 51 of the drum 50.

The paint supply device (b), the compressed air supply device (c), the traction device (d) is mounted on one car 61 as a whole can be transported and installed to the required site.

11 and 13, circumferences 62 and 63 are for circulating a liquid and a hardening liquid for always flowing even during paint spraying, that is, even when the paint is not supplied to the painting machine a. A magnetic member 71 which is a hose and is compatible with the male member 72 of the connection port e attached to the distal end of the paint supply pipes 48 and 49 connected to the sprayer a is attached to the distal end. After finishing the coating, the coating machine a is immediately removed from the paint supply pipes 48 and 49, and the circulation hoses 62 and 63 are connected instead.

Since the circulation hoses 62 and 63 are in contact with the liquid tanks 42 and 43, respectively, the pouring liquid and the hardening liquid can always circulate and flow.

Then, using the coating device (H), the coating on the inner surface of the pipe is constructed as follows.

That is, in the previous step, the sprayer (a) is connected to the distal end of the wire-rooff passing in the tube (A) and pulled back to the wire-off so that the coatinger (a) is cowled (20) to the multi-stage opening of the tube. Position toward the opening and release the wire to off in sprayer (a).

Next, when the pouring liquid and the hardening liquid are sent to the coating machine a by the paint supply device b, compressed air is supplied by the compressed air supply device c at the same time.

Then, the injection liquid and the curing liquid are mixed and injected from the injection nozzle 32, and at the same time, the cowling 20 rotates at a high speed according to the driving of the air motor 10.

Therefore, the paint sprayed from the injection nozzle 32 becomes a fine atomized state in the small hole 23 of the cowling 20 by the centrifugal force accompanying the rotation of the cowling 20, and scatters into the pipe A to the inner wall of the pipe. Arrives.

In this state, the sprayer (a) is pulled into the pipe via the towing device (D).

That is, the rotating drum 50 is rotated in the winding direction, and the coating machine a is pulled back to the insertion end portion by winding the paint supply pipes 48 and 49 and the air hose 60 back.

A coating film is formed on the inner surface of the tube A in accordance with the process of the pulling back.

In this way, as the coating machine (a) is moved from the end of the tube (A) to the end, the anticorrosive synthetic resin is coated on the entire surface of the tube (A), and the present process is completed.

In this process, the inner surface of the pipe is completely covered with anti-corrosive resin coating, so that rust, scale, foreign matter, etc. can be left on for a long time, and can be replaced with a new pipe or a period until rehabilitation works again. The period until it can be extended significantly.

This can be extremely helpful for authorities suffering from financial difficulties.

Next, the renovation of the existing water pipe by the method of the present invention is completed by drying the coating film, connecting the cut water pipe A, and filling and returning the working blood B. It carries out as a method similar to the method performed in the inner surface drying process after the tubing mentioned above.

In this way, when the paint is dried, it can be left for a natural time and the time required for the construction can be shortened as compared to waiting for the paint to dry.

As mentioned above, according to this invention, the above-mentioned object can be achieved reliably.

Claims (1)

A motor is built into the casing, and a passage of compressed air for rotating the motor and a paint passage penetrating the casing in the axial direction are formed, and a cowling shaft connected to the motor shaft is formed at the tip of the casing to rotate the cowling shaft. A cap-shaped cowling with a large number of small holes is installed on the main surface, and the injection nozzle is connected to the outlet of the paint passage to protrude into the cowling, and the injection hole is faced at an appropriate interval on the inner circumferential surface of the cowling. A mixing device is connected to the inlet of the paint passage and supplies and mixes the liquefied liquid and the curing liquid constituting the two-component synthetic resin paint in the passage. When the casing is inserted into the water pipe, it is suitable between this and the inner surface of the casing. Supported to maintain the gap, and the support angle to position the axis on the center line of the permanent tube Pipes for rehabilitation of existing water pipes.

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