KR20130001531U - Painting pretreatment device for a fixed pipeline - Google Patents

Abstract

The present invention relates to an internal surface pretreatment apparatus of a large fixed tube to treat the inner surface of the large fixed tube to the roughness suitable for painting.
The present invention is a machining tool (2, 2 ') for cutting the inner surface of the fixed pipe (P); A swing device (4) for pivoting the processing tool (2, 2 '); The turning device 4 equipped with the processing tools 2 and 2 'is installed and includes a moving trolley 3 which moves in the longitudinal direction of the tube in the fixed pipe P.
The present invention can easily perform pretreatment of the inner surface of a large fixed conduit by cutting the inner surface while turning the machining tool along the inner surface of the conduit. Advantages and excellence in pretreatment work can improve the paint quality and enhance economic efficiency by improving work efficiency.

Description

Internal pretreatment device for large stationary pipes {PAINTING PRETREATMENT DEVICE FOR A FIXED PIPELINE}

The present invention relates to an inner surface pretreatment apparatus for a large fixed conduit, and more particularly, to an inner surface pretreatment apparatus for a large fixed conduit for treating the inner surface of the large fixed conduit with roughness suitable for painting.

In general, pipes such as cast iron pipes and steel pipes, which are widely used as piping materials for water and sewage pipes, to prevent rusting of steels and to maintain their long-term lifespan, are protected from corrosion and provide safe drinking water. Hereinafter referred to as inner surface).

For such painting work, the pretreatment work (roughness work) to remove foreign substances on the surface and give roughness to the surface to make the film stick well before the painting work. There are short blast and sand blast that inject sand (sand) to make small and uniform scratches on the surface, and the roughness of the scratch is made into surface roughness.

Surface roughness suitable for painting requires a relatively rough surface treatment of 25 to 75 microns. If such roughness is not produced (too smooth and exceeding 20 microns), the coating will weaken its adhesion and eventually fall off.

Regarding the surface roughness of steel or tube, it is mentioned in Korean Unexamined Patent Publication No. 10-2004-0012520, Korean Unexamined Patent Publication No. 10-2006-0062129, and the like. See bibliography.

Reference 1 refers to the operation of blasting the inner surface of the cast iron pipe body portion to make the surface suitable for the roughness of the painted surface, and reference 2 refers to the operation of pre-processing (polishing) the inner surface of the cast iron pipe.

In addition, the Republic of Korea Patent Publication No. 10-2011-0021284 is a lining of the steel pipe and cast iron pipe consisting of a scraper that is unfolded in the outward direction by the centrifugal force by the rotation of the rotating plate and the scraper roller scrapes the scale by contacting the inner diameter of the steel pipe and cast iron pipe. Surface treatment apparatus is disclosed.

In the Republic of Korea Patent Application Publication No. 10-2010-0074133, by inhaling or spraying the fluid through the stroke portion provided in the middle of the flow path, the cavitation is generated to generate bubbles, and near the stroke portion by the impact force generated when the bubbles are pressed and broken. The surface treatment method and the apparatus which act on the to-be-processed surface of this invention are published.

Thus, pretreatment is performed to roughen the surface for painting the inner surface of the pipe, such as cast iron pipe, steel pipe used as the piping material of the water and sewage pipe.

This pretreatment operation is not easy to rotate, unlike large pipes, which are easy to rotate and surface-treated on the inner surface. Especially, buried large pipe fixed pipes cannot rotate the workpiece (large pipes) and general short. In the pretreatment method such as blasting, internal pretreatment is not easy.

In other words, in order to apply the shot blasting method, the nozzle that sprays the shotball at a certain distance has to be rotated along the inner surface of the large pipe fixing pipe, but a device has been developed to perform pretreatment work while turning along the inner surface of the fixed pipe. There is no situation.

In particular, in rehabilitation of large pipe fixed pipes that are rebuilt with the pipelines intact, there is no choice but to rely on the manual work of manpower directly in the large pipe fixed pipes embedded after customs. Environmental pollution and worker's pollution are caused by the occurrence and spraying of shotball.

On the other hand, in relation to the customs of the fixed pipelines in the Republic of Korea Patent Publication No. 10-0807803 buffered in response to the change in the pipe diameter of the pipeline to match the center of the pipeline by providing a uniform blow pressure of the high-pressure fluid to the pipeline surface This article is about a non-garden pipeline customs self-propelled vehicle that can smoothly remove the scale deposited on it.

In addition, the Republic of Korea Patent Publication No. 10-2008-0006224 of the water and sewage pipes to use the repulsive force when the high-pressure fluid ejected from the nozzle hit the inner surface of the pipe to remove the scale layer on the inner surface of the pipe while rotating the nozzle portion Pipe washing machines for non-rigged rehabilitation are listed.

(Reference 1) Republic of Korea Patent No. 10-0737344 2007.07.09. p8. (Reference 2) Korean Utility Model Publication No. 20-2011-02086 2011.03.04. p3.

In the present invention, several machining tools composed of helical milling cutters are pivoted inside the fixed pipe so that the processing tool pivoting along the inner surface of the fixed pipe can cut the inner surface of the fixed pipe to pretreat the work. It is intended to provide an internal pretreatment device.

In addition, the present invention enables the surface treatment work using air as a driving source, cutting work by the artificial diamond cutting tip of mill cut, and the economic speed is excellent with long working life, and the input / discharge of shot ball or sand compared to shot blast. It only has its own cutting chips and relatively little dust, so it is advantageous to prevent environmental pollution.

In addition, the present invention can increase the adhesive strength and strength in the longitudinal direction, the direction in which the fluid flows in the pipe after the completion of the painting work by forming a spiral directional roughness in the longitudinal direction and the perpendicular direction of the pipe body and urethane vulnerable to the relative adhesive strength of the paint in commercial use It is intended to provide an advantage to be suitable for urea coating and the like.

The present invention for solving the above problems;

According to the invention described in claim 1, Large fixed conduit consisting of a processing tool for cutting the inner surface of the fixed tube, a turning device for turning the processing tool, and a turning device equipped with the processing tool and moving in the longitudinal direction of the tube from the inside of the fixed tube. An inner surface pretreatment apparatus of claim 1, wherein the turning device comprises: a; The rotary tool is coupled to the rotary joint connected to the reduction gear of the driving motor, and the actuator is installed in all directions of the swivel, and the machining tool is mounted on the actuator of the swivel. The main gear is coupled to the drive shaft of the air motor, and the main gear is coupled to the driven gear, characterized in that configured by combining the mill cut to both sides of the driven gear.

According to the invention described in [claim 2]; According to claim 1, Mill cut constituting the processing tool; It is characterized by consisting of a helical milling cutter which is implanted artificial diamond into the cutting tip of the cutter blade and heat treated.

The present invention can easily perform the inner surface pretreatment of the large fixed pipe by cutting the inner surface while the machining tool is rotating along the inner surface of the fixed pipe.

In addition, the use of an air compressor used for painting work by driving the processing tool with air as a power source can maximize economic benefits with additional cost reduction and equipment compatibility.

In addition, the cutting speed by the artificial diamond cutting tip is fast and the economical effect is excellent with long life.The pretreatment of large fixed pipes buried underground, as well as the fixed pipes of curved pipes and shaped pipes, is also possible. By forming the spiral roughness in the longitudinal direction and the cross direction, it can be expected to increase the adhesive strength and strength in a specific direction (length direction) after completion of the painting work.

1 is an overall configuration showing an embodiment of the present invention.
Figure 2 is a cross-sectional view showing the configuration of the turning device and the processing tool of the present invention.
Figure 3 is a cross-sectional view showing the configuration of the mobile bogie during the present invention.
Figure 4 is a partial cross-sectional view showing the configuration of the processing tool of the present invention.
5 and 6 are perspective views showing an example of a mill cut of the processing tool of the present invention.
Figure 7 is a partial cross-sectional view schematically showing the structure of the rotary joint of the present invention.

The present invention is equipped with a diamond milling cutter (hereinafter referred to as a mill cut) on an air motor to form a processing tool, and the processing tool rotates the inside of the fixed pipe and cuts the inner surface of the fixed pipe to perform surface treatment. The internal pretreatment device of the large fixed pipe is constructed.

The present invention is a machining tool for cutting the inner surface of the fixed pipe, a turning device for rotating the machining tool is installed by the processing tool, and the moving bogie and the moving bogie moving in the longitudinal direction of the tube inside the fixed pipe passage It is installed on the mobile bogie and moves in the longitudinal direction of the tube to the mobile bogie consists of a machining tool for cutting the inner surface of the fixed pipe passage while pivoting along the inner surface of the tube.

The processing tool allows the mill cut to be driven by being connected to the air motor, and the processing tool is configured to pivot in combination with the swinging device of the moving trolley.

The processing tool combines a main gear composed of bevel gears to the drive shaft of the air motor, and combines a driven gear, which is also a bevel gear, to the main gear on both sides, thereby combining a mill cut to both sides of the driven gear to form a processing tool.

The processing tool is configured to install several pieces in the turning device of the moving trolley so that the processing tool rotating at high speed moves the longitudinal direction of the fixed pipe by the moving trolley together with the turning movement to cut the inner surface of the fixed pipe.

Looking at the specific embodiments of the present invention in detail as follows.

Figure 1 is an overall configuration showing an embodiment of the present invention, Figure 2 is a cross-sectional view showing the configuration of the turning device and the processing tool of the present invention, Figure 3 is a cross-sectional view showing the configuration of the mobile bogie of the present invention, Figure 4 5 and 6 are perspective views showing an example of the cutting tool mill cut during the present invention, and FIG. 7 is a partial sectional view schematically showing the structure of the rotary joint according to the present invention.

The machining tools 2 and 2 'enable the mill cuts 1 and 1' to be driven by the air motor 22, and the machining tools 2 and 2 'are provided with a turning device installed on the moving trolley 3. It can be combined with 4) to make it turn. The processing tools 2 and 2 'couple the main gear 24 composed of bevel gears to the drive shaft 23 of the air motor 22, and the main gear 24 is also driven gear 25, which is also a bevel gear. 25 ') is coupled to both sides to form a milling tool (1,1') on both sides of the driven gear (25,25 ') to form a processing tool (2,2').

The air motor 21, the main gear 24 and the driven gears 25 and 25 'of the processing tools 2 and 2' are installed in the housing 21, and several of them are pivoting devices 3 of the moving trolley 3. In addition to the pivoting movement, the inner surface of the fixed pipe (p) is cut while moving in the longitudinal direction of the fixed pipe (p) by the moving trolley (3).

The power transmission structure of the air motor 21 for driving the mill cuts 1, 1 'constituting the processing tool 2, 2' at high speed can be variously implemented as equivalent means in addition to the above-described bevel gear. Of course.

The mill cuts 1 and 1 'constituting the processing tool 2 and 2' are implanted artificial diamonds into the cutting tips 12 of the cutter blade 11 as helical milling cutters as shown in Figs. And heat treatment to form a cutter blade 11, the cutter blade 11 is configured to have a general 30 ° slope.

{Cutter blade 11 is to be selected differently in accordance with the machining (rotation) speed, to uniform the machining surface and evenly distribute the power to prevent vibration and bring a continuous machining surface.}

Although the mill cut 1 is briefly illustrated in the drawings, for example, it can be implemented in various forms in which artificial diamond is implanted and heat-treated to the cutting tip 12 of a cylindrical helical milling cutter having an outer diameter of 60 mm and a length of 45 mm.

In addition, the air motor 21 is configured to rotate the mounted mill cut (1) at 15000 ~ 2000rpm per minute to provide air as a drive source by using the air compressor used for painting work, further reducing the cost and equipment compatibility, etc. This will increase work efficiency and maximize economic benefits.

The processing tool (2, 2 ') is to be pivoted by mounting the housing (21) on the rotary table 41 of the turning device (4), coupled to the actuator (45, 45') in all directions of the rotary table 41 The housing 21 of the machining tools 2 and 2 'is connected thereto, and the machining tools 2 and 2' are moved as the actuators 45 and 45 'in the inner diameter direction of the fixed conduit P, thereby processing the machining tools 2 and 2'. 2 ') and the distance between the inner surface (working surface) of the fixed pipe (P). This will be further mentioned later.

As described above, the turning device 4 to which the milling tools 1 and 1 'are rotated at high speed and the processing tools 2 and 2' for cutting the inner surface of the fixed pipe P are coupled to the moving cart 3. Swivel device 4 is the rotary table 41 is connected to the rotary joint 42, the rotary joint 42 is connected to the reducer 44 of the drive motor 43, the rotary table 41 is connected to the rotary joint 42 Rotate).

The rotary joint 42 is connected to the two porter for driving the actuator for the rotation of the air motor, cutting distance and is connected to the reducer 44 of the drive motor 43.

The reducer 44 of the drive motor 43 reduces the rotational speed (for example, 1 to 2 revolutions per second) to transmit rotational force to the rotary joint 42.

On the other hand, the rotating table 41 forms guides 46 and 46 'in all directions, and combines the processing tools 2 and 2' to rotate the processing tool 2 and 2 'by the rotation of the rotating table 41. To make it possible.

Actuators 45 and 45 'are installed on the swivel 41 in all directions, and the guides 46 and 46' are coupled to the rotating rod 41 to the working rods of the actuators 45 and 45 '. To adjust the distance between the inner surface of the fixed pipe (P) by moving the machining tool (2, 2 ') as the actuator (45, 45') in the inner diameter direction in accordance with the inner diameter of the fixed pipe (P) by coupling the housing 21 of the To be set.

In the above, the actuators 45 and 45 'may be implemented in various shapes and structures, and the housings of the machining tools 2 and 2' connected in the actuators 45 and 45 'and the guides 46 and 46' 21) moves to the actuator (45, 45 ') to adjust the distance to the inner diameter of the fixed pipe (P).

In addition, a tension device, such as a spring, is added between the actuators 45 and 45 'and the processing tool 2 and 2' to give an appropriate tension to the distance between the mill cuts 1 and 1 'and the workpiece (inner diameter). The inner surface of the furnace P can be configured to be uniformly processed and maintained.

The rotary joint 42, the drive motor 43, and the speed reducer 44 constituting the turning device 4 are installed in the main body 31 of the moving cart 3 to move the moving device 3 by the movement of the moving cart 3. 4) and the machining tool (2, 2 ') mounted on the turning device (4).

And the moving cart 3 is coupled to the support wheels (5, 5 ') in three directions to the main body 31 to move in the longitudinal direction along the fixed pipe (P). The support wheels 5 and 5 'are coupled to the connection link 51 having the wheels 52 coupled to the same length in three equiangular directions so that the moving cart 3 is fixed to the fixed pipe by the support wheels 5 and 5'. (P) It is located in the center of the inside so that it can be stably supported along the inner diameter.

The connecting link 51 of the support wheels 5, 5 'is fixed or stretched so that its length is positioned in the center of the workpiece (fixed pipe) according to the size of the inner diameter of the fixed pipe (P) as shown. In this configuration, the support wheels 5 and 5 'coupled to the main body 31 of the mobile trolley 3 and having a stretch function are provided in the patent document (Korean Patent Publication No. 10-0807803, Korean Laid-Open Patent Publication). 10-2008-0006224 et al.). Naturally, the support wheels 5 and 5 'can be implemented by various known equivalent means.

On the other hand, by connecting the rope 6 to the main body 31 of the mobile trolley 3 to which the support wheels 5 and 5 'are coupled, the mobile trolley 3 is towed and moved at a constant speed as the rope 6. Work is done along the fixed pipe (P).

That is, the rope 6 is controlled by the traction of the moving cart 3 using the rope 6 without a separate mobile drive device by varying the pulling speed for the continuous operation of the long-distance working zone and the degree of work progress, etc. Move it.

In order to explain the embodiments of the present invention in detail, the reference numerals used in the accompanying drawings will be briefly described for each reference.
1,1 ': Milling Cutter 11: Cutter
12: cutting tip
2,2 ': Machining tool 21: Housing
22: air motor 23: drive shaft
24: Main gear 25,25 ': Follow gear
3: moving cart 31: main body
4: turning device 41: swivel
42: rotary joint 43: drive motor
44: Reducer 45,45 ': Actuator
5: support wheel 51: connecting link
52: wheel 6: rope
The terminology used in the description of the present invention and the description of the claims, including the description of the above signs, is intended to explain the present invention in the best way, including the entire contents including the purpose and configuration of the invention and the accompanying drawings. It should be understood and interpreted comprehensively and objectively, but it should not be limited to the dictionary meaning only to obscure the meaning and concept of the terms used.

Claims (2)

The processing tool (2,2 ') for cutting the inner surface of the fixed pipe (P), the turning device (4) for turning the processing tool (2,2') and the processing tool (2,2 ') In the internal pretreatment apparatus of a large fixed conduit consisting of a moving trolley (3) installed with a mounted turning device (4) and moving in the longitudinal direction of the tube in the fixed conduit (P),
The pivoting device (4); The rotary shaft 41 is coupled to the rotary joint 42 connected to the reduction gear 44 of the driving motor 43, and the actuators 45 and 45 'are installed on all sides of the rotary table 41, and the actuator 45 of the rotary table 41 is provided. And 45 ') on the machining tool (2,2')
The processing tool (2, 2 ') is; The main gear 24 is coupled to the drive shaft 23 of the air motor 22, and the driven gears 25 and 25 'are coupled to the main gear 24 to cut both sides of the driven gears 25 and 25'. Internal pre-treatment apparatus of a large fixed pipe, characterized in that by combining 1,1 '). The method of claim 1,
Mill cut (1) constituting the processing tool (2, 2 '); An internal pretreatment apparatus for a large fixed pipe passage, comprising a helical milling cutter which is implanted with an artificial diamond to a cutting tip 12 of a cutter blade 11 and heat treated.

Images