JP3860498B2 - Anti-corrosion treatment method and anti-corrosion treatment equipment for horizontal surfaces - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present inventionRailwaySteel girders in iron bridgesupperThe present invention relates to an anticorrosion treatment method for applying an anticorrosion treatment by applying a synthetic resin solution coating agent obtained by mixing a synthetic resin solution and a curing agent on a horizontal plane, and an anticorrosion treatment apparatus for applying this method.
[0002]
[Prior art]
  RailwayIn the iron bridgeBridge girderIn general, materials such as steel and concrete are used. However, these materials are subject to deterioration such as corrosion due to adhesion of moisture, erosion due to earth and sand, weathering, and wear over time. Therefore, as a countermeasure against corrosion and wear resistance on the steel and concrete surfaces described above, it has traditionally been possible to prevent corrosion by applying and curing a synthetic resin liquid coating agent that is a mixture of a synthetic resin liquid and a curing agent on the surface. There are anti-corrosion treatment methods that apply treatment.
[0003]
  When using a relatively slow resin with a curing speed of 10 minutes to several tens of hours as this construction method, a coating agent in which a synthetic resin liquid and a curing agent are mixed is poured on the horizontal surface of the structure, and a brush, a spatula, or a roller is applied. The method of spreading and applying by, for example, is adopted. In addition, when using a relatively fast resin with a curing time of 30 seconds to 1 minute, the method of applying by spreading with a brush, a spatula, or a roller is not applicable because the curing speed of the resin is fast. Using a spraying device equipped with a mixing unit that mixes the synthetic resin liquid and curing agent at the tip, the mixed coating agent is immediately sprayed with air and applied, or the synthetic resin solution and curing agent are mixed at the tip A construction method that employs a method in which a mixed coating agent is immediately sprayed at a high pressure by using a spraying device including a mixing unit is employed.
[0004]
[Problems to be solved by the invention]
  However, in the conventional anticorrosion treatment method, in the method of spreading and applying the coating agent with a brush, spatula, or roller, the coating thickness tends to be uneven depending on how the coating agent is spread. Since it takes a long time from application to curing, there is a problem that the coating agent flows under the influence of unevenness on the horizontal surface and the finished surface is not smooth. In addition, when forming a thick coating layer in order to further improve corrosion resistance and wear resistance, it is necessary to coat the coating layer in layers, increasing the number of coating and curing processes, and the construction time. There is a problem that becomes longer. In addition, in the air spray method in which the coating agent is sprayed and applied using air, and in the construction method using the airless spray method in which the coating agent is sprayed and applied at a high pressure, a resin having a relatively fast curing time is used. Although a thick coating layer can be formed at a time, there is a problem that the finished surface of the coating layer becomes rough due to uneven coating of coating agents or mixing of bubbles. Furthermore, because the coating agent is sprayed and sprayed around, the construction environment is bad,RailwayIf construction is performed on a horizontal plane on a steel girder in an iron bridge, there is a problem of adversely affecting surrounding houses.
[0005]
  The present invention solves the above-described problems, and the problem is thatSteel girders in railway bridgesAn anti-corrosion treatment method on the horizontal surface that can form an anti-corrosion coating layer with a smooth and uniform surface finish on the horizontal surface of the surface and ensure that the anti-corrosion treatment can be performed, the construction environment is good, and the construction time can be shortened. And providing an anticorrosion treatment apparatus.
[0006]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention is concerned.Anticorrosion treatment methodIsLift the sleepers and rails laid on the horizontal surface on the steel girders with the rails connected to the sleepers, and provide a narrow gap between the horizontal surfaces on the steel girders and the sleepers,A mixing tube for generating a synthetic resin liquid coating agent by internally mixing a synthetic resin solution and a curing agent having a high curing rate supplied from an external supply means, and a nozzle provided at the tip of the mixing tube, The coating unit withInsert it into the narrow gap,Apply unitSteel girdersAlong the horizontal planeWhile displacing in the longitudinal direction of the steel girder, Synthetic resin liquid coating agent from nozzleShedByOn steel girdersThe synthetic resin liquid coating agent is diffused in the horizontal plane to form a smooth and uniform anticorrosion coating layer.
[0007]
  By doing this,Horizontal plane on steel girderBecause the synthetic resin liquid coating agent that spilled on the surface spreads on the horizontal surface due to the viscosity of the resin, it becomes a uniform thickness and instantly cures.On the contact surface between the horizontal plane on the steel girder and the sleepers,It is possible to form a high-quality anti-corrosion coating layer having a large thickness and a smooth finished surface, and to reliably perform the anti-corrosion treatment. Moreover, since the curing time of the synthetic resin liquid coating agent to be used is fast, the construction time can be shortened.Furthermore, since the anticorrosion coating layer is formed without the synthetic resin liquid coating agent splashing, the construction environment can be improved.
[0008]
  Also,The anticorrosion treatment apparatus for carrying out the anticorrosion treatment method according to the present invention comprises (1) a synthetic resin liquid coating agent obtained by internally mixing a synthetic resin liquid and a curing agent supplied from an external supply means and having a high curing rate. A coating unit including a mixing tube that generates a nozzle and a nozzle provided at the tip of the mixing tube, (2) a support unit that supports the coating unit, (3) a main body unit that couples the support unit, and a main body unit And a wheel that travels on a guide rail attached to the side surface of a steel girder in a railway bridge and displaces the coating unit in the longitudinal direction of the steel girder.FromComposed.
[0009]
  The application unit is formed by lifting the sleepers and rails laid on the horizontal surface of the steel beam with the rails connected to the sleepers, and narrowing the space between the horizontal surface of the steel beam and the sleepers. The size can be inserted into the gap. The application unit inserted in this narrow gapIn the longitudinal direction of the steel girder by the carriage along the horizontal plane of the steel girderWhile displacingThen, the synthetic resin liquid coating agent is allowed to flow from the nozzle to diffuse the synthetic resin liquid coating agent on the horizontal surface of the steel girder, thereby forming a smooth and uniform anticorrosion coating layer.
[0010]
  By using such a device, depending on the range of the horizontal plane on the steel girder and the thickness of the anticorrosion coating layer to be formed, the amount of dripping of the synthetic resin liquid coating agent and the coating unitMoveThe dripping pitch can be adjusted, and a smooth and uniform anticorrosion coating layer that instantly cures on a horizontal surface can be formed, and the anticorrosion treatment can be reliably performed. Moreover, since the application unit has a size that can be inserted into a narrow gap formed between the steel beam and the sleepers, the amount of lifting of the sleepers and rails can be made small. For this reason, it is not necessary to correct the trajectory after the sleepers and rails are lowered onto the steel girders, and the construction time can be shortened.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1-4 is a figure which shows the anti-corrosion processing apparatus which concerns on this invention, lifts the sleeper currently laid on the steel girder of the railway bridge of a railway, a rail, and the narrow clearance gap provided between the steel girder and the sleeper The state where it is inserted is shown. 1 is a plan view of the anticorrosion treatment apparatus, FIG. 2 is a right side view thereof, FIG. 3 is a front view thereof, and FIG. 4 is a cross-sectional view taken along line AA in FIG.
[0012]
  In FIG. 1, K is a steel girder, Ka is a horizontal plane on the steel girder, and Kb is a connecting portion that connects steel materials constituting the steel girder. As shown in FIGS. 2 and 3, a sleeper W and a rail R connected to the sleeper W are laid on the upper surface of the steel beam K. Reference numeral 1 denotes an anticorrosion treatment apparatus. Reference numeral 2 denotes a coating unit, and a mixing tube 3 for mixing a synthetic resin liquid as a main agent and a curing agent for the synthetic resin liquid by a static mixer 4 included therein to generate a synthetic resin liquid coating agent La, and a mixing tube 3 provided at the front end of the nozzle 5 for discharging the generated synthetic resin liquid coating agent La onto the horizontal plane Ka, and at the rear end of the mixing tube 3, a mixing tube for the synthetic resin liquid and the curing agent of the synthetic resin liquid 3 and an introduction part 6 to be introduced into the system. Reference numeral 7 denotes a main agent supply source, which supplies a synthetic resin liquid, which is a main agent, to the coating unit 2 through a supply hose 9a by a connected pump Pa. A curing agent supply source 8 supplies a curing agent of a synthetic resin liquid to the coating unit 2 via a supply hose 9b by a pump Pb connected thereto.
[0013]
  Reference numeral 10 denotes a frame which is a support portion for supporting the coating unit 2. A slide member 12 connected to the coating unit 2 is attached to a slide guide 11 connected to the frame 10, so that the coating unit 2 has a width of the steel beam K. It is slidably supported in the left and right directions X1 and X2, which are directions. Further, as shown in FIG. 3, the thickness of the frame 10 in the height direction is thin. By reducing the thickness in this way, the amount of lifting of the sleepers W and the rails R from the steel girders K can be reduced and the anticorrosion treatment can be performed. Further, the frame 10 has a three-piece structure including a front end frame 10a, an intermediate frame 10b, and a rear end frame 10c. The front end frame 10a and the intermediate frame 10b are connected by a joint 10d, and the intermediate frame 10b and the rear end frame 10c are connected. The frame 10c is connected by a joint 10e so that the intermediate frame 10b can be removed. By adopting such a structure, if the intermediate frame 10b is removed, and the front end frame 10a and the rear end frame 10c are connected by joints 10d and 10e, two cartons 15 and guide rails 16 described later are left as they are. Any of the digits K can be subjected to anticorrosion treatment.
[0014]
  Reference numeral 14 denotes a slide cylinder which is a drive unit, and one end of a rod 13 is mounted. Since the other end of the rod 13 is connected to the slide member 12 connected to the coating unit 2, the slide cylinder 14 swings the coating unit 2 in the left and right directions X1 and X2 via the rod 13. The slide cylinder 14 can be pneumatic, hydraulic, or electrically driven by a ball screw or the like. Further, the rod 13 has a two-piece structure, and the front end rod 13a and the rear end rod 13b are connected by a joint 13c, and the front end rod 13a can be removed. By adopting such a structure, if the front end rod 13a is removed and the rear end rod 13b is connected to the slide member 12 in the same manner as the frame 10, two steel plates are left without changing the carriage 15 and the guide rail 16 described later. Any of the digits K can be subjected to anticorrosion treatment.
[0015]
  Reference numeral 15 denotes a carriage which is a moving body for connecting the frame 10, and includes a main body portion 15a, a connecting portion 15b for connecting the frame 10 on the main body portion 15a, and the frame 10 on the main body portion 15a in the longitudinal direction Y1 of the steel beam K. , Y2 is slidably supported by a slide bar 15c, a wheel 15d with a derailment prevention plate inside, and a motor 15e that rotates the wheel 15d and moves the carriage 15. The carriage 15 travels on the guide rails 16 arranged in parallel with the longitudinal directions Y1 and Y2 of the steel beam K by wheels 15d rotated by a motor 15e. Displacement in the Y2 direction among the longitudinal directions Y1 and Y2 is made possible. Further, since the frame 10 is connected by the connecting portion 15b on the main body portion 15a of the carriage 15 and is supported by the slide bar 15c, the position of the coating unit 2 is moved to the steel by moving the frame 10 on the main body portion 15a. Fine adjustment can be made in the longitudinal direction Y1, Y2 of the digit K. The guide rail 16 is supported by a bracket 17 that is fixed to a connecting portion Kb on the side surface of the steel beam K by a mounting member 17a. Reference numeral 18 denotes a guide wheel for preventing the frame 10 from being bent.
[0016]
  Next, the operation of each part when the anticorrosion treatment apparatus 1 configured as described above performs an anticorrosion treatment on a horizontal surface on a steel girder will be described. First, the anticorrosion treatment apparatus 1 receives the supply of the synthetic resin liquid and the curing agent, which are the main ingredients, to the coating unit 2. The synthetic resin liquid is supplied from the main agent supply source 7 to the introduction unit 6 by the pump Pa through the supply hose 9a. The curing agent is supplied from the curing agent supply source 8 to the introduction unit 6 via the supply hose 9b by the pump Pb. Then, the supplied synthetic resin liquid and the curing agent are merged in the introduction unit 6 and introduced into the mixing tube 3 from the introduction unit 6 by the supply pressure from each pump. The synthetic resin liquid and the mixing agent introduced into the mixing tube 3 are uniformly mixed by the static mixer 4 in which a large number of fixed dividing blades are provided in the axial direction inside the mixing tube 3 to generate a synthetic resin liquid coating agent La. . At this time, the synthetic resin liquid coating agent La is sequentially divided by the dividing blades in the static mixer 4, so that mixing proceeds and the synthetic resin liquid coating agent becomes a very fast curing time. As the synthetic resin liquid coating agent La, a polyurea resin or urea urethane resin having a fast curing time of about several tens of seconds to 1 minute, or a urethane resin having a slightly slow curing time is used.
[0017]
  Thereafter, the generated synthetic resin liquid coating agent La is sent to the nozzle 5 at the tip of the mixing tube 3 by the supply pressure from the pump, and directed from the opening 5a (shown in FIG. 2) of the nozzle 5 toward the horizontal plane Ka on the steel beam. And run down. Here, as shown in FIG. 6A, the opening 5a of the nozzle 5 is provided in the inclined surface 5b inclined with respect to the horizontal plane Ka on the steel beam, and is a vertically long slit opened toward the horizontal plane Ka. It has a shape. Thereby, since the synthetic resin liquid coating agent flows out over the entire length of the slit, the synthetic resin liquid coating material La can be dripped over a wide range on the horizontal plane Ka on the steel beam. And as a result of being able to apply the synthetic resin solution coating agent La widely, a more uniform anticorrosion coating layer can be efficiently formed in a short time. This is particularly effective when the anticorrosion coating layer is formed thin.
[0018]
  Simultaneously with the dripping of the synthetic resin liquid coating agent La, the slide cylinder 14 is driven, and the coating unit 2 is swung in the left and right directions X1 and X2 through the rod 13 with a predetermined number of swings. At the same time, the wheel 15d of the carriage 15 is driven, and the carriage 15 is moved and moved on the guide rails 16 arranged in parallel with the longitudinal directions Y1 and Y2 of the steel girders K. Is displaced in the longitudinal direction Y2 of the steel beam K at a moving speed of. Then, the synthetic resin liquid coating agent La is regularly dropped on the horizontal plane Ka on the steel beam at a predetermined drop pitch, and is diffused and cured by the viscosity of the resin over the entire horizontal plane Ka on the steel beam. As shown in FIG. 2, the anticorrosion coating layer Lb having a predetermined thickness is formed, and the anticorrosion treatment is performed on the horizontal plane Ka on the steel beam.
[0019]
  By doing in this way, according to the length and width of the horizontal surface Ka on the steel beam and the thickness of the anticorrosion coating layer Lb to be formed, the amount of dripping of the synthetic resin liquid coating agent La, and the swing and movement of the coating unit 2 By adjusting the dripping pitch, the synthetic resin liquid coating agent La can flow regularly onto the horizontal surface Ka on the steel beam, so that the anticorrosion coating layer Lb having a uniform thickness and a smooth finished surface can be formed. It can be formed and reliably subjected to anticorrosion treatment. Further, since the curing speed of the synthetic resin liquid coating agent La to be used is high, the construction time can be shortened. Furthermore, since the anticorrosion coating layer Lb is formed on the horizontal surface Ka on the steel beam without the synthetic resin liquid coating agent La splashing, the construction environment can be improved.
[0020]
  FIG. 5 is a diagram for explaining the anticorrosion treatment method according to the present invention. In FIG. 5, K is a steel girder in an iron bridge, Ka is a horizontal plane on the steel girder, and C is an abutment on which a steel girder K is constructed of a material made of concrete. W is a sleeper laid on the steel beam K, R is a rail connected to the sleeper, and G is a ballast part in which a ballast is placed. 2 is a coating unit of the above-described anticorrosion treatment apparatus 1, and 10 is a frame of the anticorrosion treatment apparatus 1 that supports the application unit 2. 20a and 20b are jacks for lifting the sleepers W and the rails R from the steel girders K.
[0021]
  FIG. 5A shows a state before the anticorrosion treatment is performed on the horizontal surface Ka on the steel beam. The plurality of sleepers W are in contact with the steel beam K without gaps. From this state, the jacks 20a and 20b are installed between the steel beam K and the rail R at a predetermined position. Here, the jack 20a is installed on the right abutment C, and the jack 20b is installed on the left abutment C. Then, raise the jacks 20a and 20b, as shown in FIG.With rail R connected to sleeper WLifting sleepers W and rails R from steel girders KUpper horizontal plane KaAnd a narrow space S between the sleepers W and the sleepers W. At this time, the lifting amount of the sleepers W and the rails R is set to a small amount (for example, 4 cm) such that the coating unit 2 and the frame 10 of the anticorrosion treatment apparatus 1 are inserted.
[0022]
  Then, as shown in FIG. 5 (c), the coating unit 2 and the frame 10 are inserted into the gap S from the other side with respect to the paper surface, and synthesized from the opening 5a of the nozzle 5 of the coating unit 2 (shown in FIG. 2). The resin liquid coating agent La is dripped down toward the horizontal plane Ka on the steel beam. At the same time, the slide cylinder 14 in FIG. 1 is driven to cause the coating unit 2 to swing in the width direction of the steel beam K through the rod 13 and to move the carriage 15 in the longitudinal direction of the steel beam K. The coating unit 2 is moved in the longitudinal direction Y2 on the guide rail 16 arranged in parallel with the directions Y1 and Y2, and as shown in FIG. Displace to Y2. Thereby, the synthetic resin liquid coating agent La can be regularly dropped at a predetermined dripping pitch on the horizontal plane Ka on the steel beam, and this is cured to form the anticorrosion coating layer Lb from the right end of the steel beam K. go.
[0023]
  Then, as shown in FIG. 5 (e), after applying the synthetic resin liquid coating agent La to the left end of the steel beam K by the coating unit 2, the narrow space S between the steel beam K and the sleepers W On the other side, the coating unit 2 and the frame 10 are removed, and the anticorrosion coating layer Lb having a smooth and uniform thickness is formed over the entire horizontal plane Ka on the steel beam to perform the anticorrosion treatment. Thereafter, the jacks 20a and 20b are lowered, and the rails R and sleepers W are returned to the original state as shown in FIG.
[0024]
  By doing in this way, on the contact surface with the sleeper W of the horizontal surface Ka on the steel girder, the thickness is uniform, the finished surface is smooth and the good anticorrosion coating layer Lb is formed, and the anticorrosion treatment is surely performed. Can do. Further, if the amount of lifting of the sleepers W and the rails R is increased, there is a problem that when the sleepers W and the rails R are lowered, the rails R do not return to the original state, and the track must be corrected. Then, the amount of lifting of the sleepers W and the rails R may be so small that the coating unit 2 and the frame 10 having a small thickness can be inserted, so that the trajectory is corrected after the sleepers W and the rails R are lowered onto the steel girders K. There is no need to do this, and construction time can be shortened.
[0025]
  In the embodiment described above, as shown in FIG. 6A, the nozzle 5 is provided with the inclined surface 5b inclined with respect to the horizontal plane Ka, and the opening 5a opened toward the horizontal plane Ka on the inclined surface 5b. Since the synthetic resin liquid coating agent La is easy to hang down on the horizontal surface Ka, and the opening 5a has a vertically long slit shape, the synthetic resin liquid coating material La hangs down over the horizontal surface Ka over a wide range at a time. Can do. Therefore, even when there is a projection Q such as a rivet on the horizontal plane Ka, it is possible to uniformly coat the entire projection with the synthetic resin liquid coating agent La to form an anticorrosion coating layer having a uniform thickness. . Moreover, since synthetic resin liquid coating agent La flows out from the opening part 5a over the full length of a slit, the displacement amount of the coating unit 2 can be enlarged and construction time can be shortened.
[0026]
  However, the present invention is not limited to this, and as shown in FIG. 6 (b), even if it is a porous type nozzle 5 in which a plurality of openings 5a are provided vertically on the inclined surface 5b. Good. Moreover, as shown in FIG.6 (c), the nozzle 5 by which the opening part 5a which consists of circular holes is provided in the surface 5c perpendicular | vertical with respect to the horizontal surface Ka may be sufficient. In addition, as the shape of the opening 5a, various shapes such as a horizontally long slit shape and an elliptical shape are conceivable. The place where the opening 5a is provided is not limited to the inclined surface 5b and the vertical surface 5c described above, and may be a surface facing the horizontal plane Ka. These can be appropriately selected according to the amount of dripping of the synthetic resin liquid coating agent, the direction of dripping, or the environmental conditions such as wind and temperature during construction.
[0027]
  Moreover, in the said embodiment, although the anticorrosion process is performed to the horizontal surface Ka on a steel girder immediately after raising the sleeper W and the rail R, as shown in FIG. A wall body 19 constituted by attaching a member such as a tape is provided along both sides of the horizontal plane Ka, and the synthetic resin liquid coating agent La dripping down on the horizontal plane Ka on the steel beam is removed from the horizontal plane Ka on the steel beam. You may give an anticorrosion process so that it may not droop. By doing in this way, while making a construction environment better, the synthetic resin liquid coating agent La can be used without waste, and material cost can be reduced.
[0028]
  Furthermore, the wall body 19 provided along the both sides of the horizontal plane Ka on the steel girder is a saucer-shaped wall body 19a as shown in FIG. 8 (a), and the synthetic resin liquid that drips down on the horizontal plane Ka on the steel girder. The coating agent La may be dropped on the dish-shaped wall body 19a and cured to form the anticorrosion coating layer Lb having a shape protruding from the horizontal plane Ka as shown in FIG. 8B. By doing in this way, when it rains, the projecting portion Lc of the anticorrosion coating layer Lb plays a role of draining water. Can be prevented from flowing to the side of the machine.
[0029]
  Further, in the above embodiment, the synthetic resin liquid coating agent La is regularly dropped on the horizontal surface Ka of the steel beam at a predetermined flow pitch and diffused throughout the horizontal surface Ka on the steel beam due to the viscosity of the resin itself. As shown in FIG. 9, an air nozzle 30 for blowing air is attached to the tip of the nozzle 5 in the Y1 direction (same as the Y1 direction in FIG. 1) via a fixture 31, and the synthetic resin is dripped from the opening 5a. Air may be weakly sprayed onto the liquid coating agent La from the opening 30a of the air nozzle 30 to promote diffusion of the synthetic resin liquid coating agent La to the horizontal plane Ka of the steel beam. In this case, it is preferable that the air to be blown is about a breeze or a gentle breeze and the surface of the synthetic resin liquid coating agent La is slightly waved. This is because if the air spray is too strong, ripples spread on the resin surface and the thickness of the anticorrosion coating layer Lb formed by curing the synthetic resin liquid coating agent La is not uniform.
[0030]
  The reason why air is blown onto the surface of the resin as described above is as follows. That is, when the resin is diffused only by the viscosity of the synthetic resin liquid coating agent La, the resin is dripped as shown in FIG. 10A when the viscosity of the resin is increased due to the influence of temperature and humidity. The synthetic resin liquid coating agent La entrains air at the swing-back position of the coating unit 2, and as shown in FIG. 10B, pinholes 22 caused by bubbles are generated in the formed anticorrosion coating layer Lb. It may become a state. In particular, it has been found that the pinhole 22 is likely to occur when the wide nozzle 5 is swung at a high speed. However, by providing the air nozzle 30 as described above and blowing air onto the resin surface, it is possible to promote the diffusion of the resin and prevent the pinhole 22 from being generated. A good anticorrosion coating layer Lb can be formed.
[0031]
  Further, in the above embodiment, the thickness of the anticorrosion coating layer Lb to be formed can be adjusted by the amount of dripping of the synthetic resin liquid coating agent La and the pitch of dripping by the oscillation and displacement of the coating unit 2, but in addition to this The thickness of the anticorrosion coating layer Lb can also be adjusted by adjusting the viscosity by changing the temperature of the synthetic resin liquid coating agent La.
[0032]
  Moreover, in the said embodiment, synthetic resin liquid and a hardening | curing agent are uniformly mixed by the static mixer 4 which provided many fixed division | segmentation blades in the axial direction inside the mixing pipe 3, and synthetic resin liquid coating agent La is produced | generated. However, the present invention is not limited to this, and a rotary blade mixer or the like may be used as long as it is a member that can uniformly mix the synthetic resin liquid and the curing agent.
[0033]
  Moreover, in the said embodiment, although the trolley | bogie 15 which drive | works automatically by the motor 15e is mentioned as an example as a moving body which moves the coating unit 2 to the front-back direction along a horizontal surface, this invention is not limited to this. Alternatively, a cart or the like that moves by a winch may be used as long as the coating unit 2 can be supported and moved on the horizontal plane.
[0034]
  Further, in the above embodiment, the application unit 2 is moved in the front-rear direction and is swung in the left-right direction so that the synthetic resin liquid coating agent flows down on the horizontal plane Ka of the steel beam K. The synthetic resin liquid coating agent may be dripped onto the horizontal surface Ka of the steel beam K while being moved only in the front-rear direction.
[0035]
【Example】
  The Example in the case of implementing the anticorrosion treatment method of this invention using the anticorrosion processing apparatus of FIGS. 1-3 is demonstrated. The horizontal plane on which the anticorrosion treatment is performed is a horizontal plane on the steel girder in the railway bridge, and has a steel girder length of 20 m and a steel girder width of 250 mm. The coating unit 2 is arranged on a horizontal plane on the steel beam, and the synthetic resin liquid coating agent mixed by the static mixer 4 in the mixing tube is allowed to flow from the nozzle 5. At this time, the resin temperature is 40 ° C., the resin viscosity is 1000 CPS, and the dripping amount is 0.5 liter / min. At the same time as the synthetic resin liquid coating agent is dripped, the coating unit 2 is swung in accordance with the width of the horizontal surface at a swing frequency of 50 times / minute, and is displaced in the longitudinal direction of the steel beam at a moving speed of 1 m / minute. The dripping pitch of the resin liquid coating agent is set to 20 mm. As a result of performing the anticorrosion treatment with the above settings, a uniform anticorrosion coating layer having a coating thickness of 2 mm was formed in the entire horizontal plane on the steel beam in a construction time of 20 minutes.
[0036]
【The invention's effect】
  According to the present invention, in an iron bridgeSteel girdersAn anticorrosion coating layer having a smooth finished surface and a uniform thickness can be formed on the horizontal surface, and the anticorrosion treatment can be reliably performed. In addition, the coating environment is not scattered and the construction environment can be improved, and the construction time can be shortened.
[Brief description of the drawings]
FIG. 1 is a plan view showing an anticorrosion treatment apparatus according to the present invention.
FIG. 2 is a right side view showing an anticorrosion treatment apparatus according to the present invention.
FIG. 3 is a front view showing an anticorrosion treatment apparatus according to the present invention.
4 is a cross-sectional view taken along the line AA in FIG.
FIG. 5 is a diagram for explaining the anticorrosion treatment method according to the present invention.
FIG. 6 is an example of a nozzle in the anticorrosion treatment apparatus according to the present invention.
FIG. 7 is a cross-sectional view of a main part in another example of the anticorrosion treatment apparatus according to the present invention.
FIG. 8 is a cross-sectional view of a main part in another example of the anticorrosion treatment apparatus according to the present invention.
FIG. 9 is a left side view showing another example of the anticorrosion treatment apparatus according to the present invention.
FIG. 10 is a diagram illustrating the generation of pinholes in the anticorrosion coating layer.
[Explanation of symbols]
      1 Anticorrosion treatment equipment
      2 Application unit
      3 Mixing tube
      5 nozzles
      5a opening
      7 Main agent supply source
      8 Hardener supply source
      10 frames
      13 Rod
      14 Slide cylinder
      15 trolleys
      15a body
      15d wheel
      16 Guide rail
      30 Air nozzle
      K steel girders
      Ka level
      La synthetic resin liquid coating agent
      Lb Anticorrosion coating layer
      P pump
      R rail
      W sleepers
      X1 left
      X2 right direction
      Y1 Longitudinal direction of steel beam
      Longitudinal direction of Y2 steel beam

Claims (2)

An anti-corrosion treatment method for applying an anti-corrosion treatment by applying a synthetic resin liquid coating agent obtained by mixing a synthetic resin liquid and a curing agent to a horizontal surface on a steel beam in a railway bridge ,
The sleepers and rails laid on the horizontal surface of the steel girders are lifted in a state where the rails are connected to the sleepers, and a narrow gap is provided between the horizontal surfaces of the steel girders and the sleepers, and external supply means A coating unit comprising: a mixing tube that generates a synthetic resin liquid coating agent by internally mixing a synthetic resin solution and a curing agent with a high curing speed supplied from the nozzle; and a nozzle provided at a tip of the mixing tube. and then inserted into the narrow gap, the while the coating unit along the horizontal plane of the steel girder is displaced in the longitudinal direction of the steel girder by drips the synthetic resin liquid coating material from said nozzle, said steel An anticorrosion treatment method for a horizontal surface, wherein the synthetic resin liquid coating agent is diffused on a horizontal surface on a girder to form an anticorrosion coating layer having a smooth and uniform thickness. An anticorrosion treatment apparatus used in the anticorrosion treatment method according to claim 1,
A mixing pipe for generating a synthetic resin liquid coating agent by internally mixing a synthetic resin liquid and a curing agent supplied from an external supply means and having a high curing speed, and a nozzle provided at the tip of the mixing pipe Coating unit,
A support portion for supporting the coating unit;
A main body part for connecting the support part, and a wheel provided on the main body part, and running on a guide rail attached to a side surface of a steel girder in a railway bridge, the application unit is moved in the longitudinal direction of the steel girder. And a carriage that is displaced to
The coating unit is formed by lifting a sleeper and a rail laid on a horizontal plane on the steel beam in a state where the rail is connected to the sleeper, and a narrow space between the horizontal surface on the steel beam and the sleeper. It is a size that can be inserted into a gap,
The synthetic resin liquid coating agent is dripped down from the nozzle while the coating unit inserted in the narrow gap is displaced in the longitudinal direction of the steel beam by the carriage along the horizontal plane of the steel beam. An anticorrosion treatment apparatus for a horizontal surface, wherein the synthetic resin liquid coating agent is diffused on a horizontal surface on a girder to form an anticorrosion coating layer having a smooth and uniform thickness.

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