JPH01230818A - Overspreading cover - Google Patents

Abstract

PURPOSE:To secure such a spreading cover that is excellent in anticorrosion, abrasion resistance and surface frictional property by forming a corrosion resisting metal spray layer in the whole irregularity surface of the spreading cover being set up on a road surface, and also a ceramic spray layer in at least each projecting part, as well as performing sealing over the whole body from the top with a resin sealing material. CONSTITUTION:A corrosion resisting metal spray layer 2 is formed on a surface of a cast iron base material 1 formed with irregularities on a top surface of a manhol cover body. A ceramic spray layer 3 is formed on top of this layer 2. In addition, sealing is applied over the whole body from the top with a transparent resin sealing material. The ceramic spray layer 3 is made up of monochrome or multicolored ceramics, and as the resin sealing material, the transparent resin sealing material is used, whereby such a multicolored spreading cover that is high in aestheticness is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to underground pipes 1. The present invention relates to a cover placed on a road surface, such as a cover for a manhole in a ditch or a cover for a drainage ditch.
Information regarding a colored cover lid that has excellent abrasion resistance, surface abrasion L, and high aesthetics.

be.

(Prior Art) Conventionally, manhole covers for underground pipelines such as water supply and sewerage, electrical wiring, gas piping, and telephone lines have been made of cast iron coated with black tar-epoxy resin paint, and concrete. Generally, those made of 6A board and those made of concrete are commonly used as the cover lid for U3 pipes (for drainage), but these covers Among them, Lonely
1'-made lids are complicated because they require a concrete hardening process during construction, and so-called iron lids such as cast iron or steel plates are the mainstream for ease of construction. There is. However, although iron lids have excellent properties in terms of ease of construction, strength, and wear resistance as described above, they have the disadvantage that their surfaces are slippery. To solve this problem, the surface of the iron lid usually has an uneven pattern to prevent slipping. This wear has become a problem, especially in rainy weather, where many passersby get tripped over or vehicles slip.

However, in recent years, due to the trend toward beautification and fashionization of urban environments, techniques for coloring such cover-ups have been considered. For example, currently the surface of the iron lid is painted with 1M epoxy.
Some products have been developed and commercialized, such as those painted with fat-based paints and those with colored resin filled in the recesses on the surface of the iron lid.

However, resin paint-coated products have low coating film hardness;
: Due to the weak adhesion between the paint film and the pig lid base, the paint film wears out or peels off in a short period of time due to the passing of people or vehicles, resulting in large maintenance costs for repainting. Even resin-filled products have the disadvantage of fading due to ultraviolet rays when exposed to sunlight for a long time, making it impossible to maintain the initial color for a long period of time. . Furthermore, with these painted iron lids, the above-mentioned functional requirements such as slipperiness are not taken into account at all, and products coated with TJJ resin paint in particular have very slippery surfaces and are not safe. There were also problems from this point of view.

In addition, an example of Japanese Utility Model Application Publication No. 16149/1983 discloses a manhole structure in which a ceramic spray coating is formed on the entire surface of a cast iron body for the purpose of improving corrosion resistance and wear resistance. It is thought that it is possible to apply coloring by, for example, constructing such a ceramic sprayed layer with colored ceramics. However, when ceramic sprayed JM was formed directly on the surface of the cast iron base material in this way, the adhesion between the ceramic film and the cast iron base material was not sufficient, and t-1J separation of the film was likely to occur. . Furthermore, the ceramic sprayed layer has a considerable number of pores, and rainwater enters through these pores, oxidizes the cast iron base material, and causes peeling from the skin H boundary, making it impossible to expect improvement in corrosion resistance. The red that occurs on the surface of the cast iron base material! h stands out on the surface of the ceramic sprayed layer, detracting from its aesthetic appearance.

(Problem M to be Solved by the Invention) Therefore, an object of the present invention is to provide a novel cover. Another object of the present invention is to provide a covering material that has excellent corrosion resistance, abrasion resistance, and high surface friction. A further object of the present invention is to provide cover moss that can maintain the color tone at the initial stage of construction for a long period of time when colored. The purpose of this invention is to provide a cover that can be used as a cover.

(Means for Solving the Problems) The above-mentioned objects are to provide a covering to be placed on a road surface with an uneven upper surface, in which a corrosion-resistant metal is applied over the entire surface of a ferrous base material on the upper surface. A thermal sprayed layer is formed, a ceramic thermal sprayed layer is formed on the corrosion-resistant metal thermal sprayed layer at least in the convex portions, and further a sealing treatment is performed over the entire surface with a resin-based sealing material. This is achieved through covert bribes.

(Function) In this way, in the cover moss of the present invention, a corrosion-resistant metal sprayed layer is formed over the entire surface of the iron-based base material on the top surface having irregularities, and i is formed with the corrosion-resistant metal at least in the convex portions. A ceramic sprayed layer is formed on the sprayed layer, and the entire structure is further sealed with a resin-based sealing material. That is, in the cover lid of the present invention,
The convex portion of the upper surface has a structure in which a corrosion-resistant metal sprayed layer and a ceramic sprayed layer sealed with a resin-based pore sealing material are successively scraped on an iron-based base material, and the four portions of the upper surface It may have a similar structure, or it may have a structure in which a corrosion-resistant metal sprayed layer sealed with a resin-based pore sealing material is formed on an iron-based base material.

In general, metal sprayed layers have a lower viscosity than ceramics when sprayed, so they have very few pores and can cover the surface of the base material closely. The corrosion-resistant metal sprayed layer formed on the surface of the iron-based base material has a high degree of bareness at the bonding interface with the iron-based base material (1,1"), and is exposed to impact force or vibration. In addition, when such a metal sprayed layer is sealed with 133 resin sealant, it is extremely difficult to cause peeling or other drop-off, which is present in the above-mentioned resistant, Il!-resistant metal sprayed debris. Since the pores would also be blocked, the pores were sealed with a resin-based sealant. Therefore, when a corrosion-resistant metal sprayed layer that can be sealed with a resin-based pore sealing material is formed, the iron-based base material is not exposed to the external environment, and extremely excellent corrosion resistance can be obtained.

Even on the upper surface of the cover, which becomes the road surface, there is a 1gf concave that is relatively thick and has little contact with vehicles and other traffic.
-Easy wear resistance due to hole sealing with t'lj oil sealer as shown below! fl metal spraying waste 1. Is it sufficient to form an IM from this? When placed on the road surface, the convex part that will be the main contact area with traffic such as L vehicles that do not enter, should have corrosion resistance as well as a suitable level. Surface friction and it abrasion properties are required.

Ceramics are highly wear-resistant materials, and as a result of extensive research, the present inventors have found that ceramic sprayed layers generally have a surface roughness of about 40 to 60μI11; It was found that this provides a suitable level of slip resistance on the road surface. Therefore, ceramic spraying f
Covering the surface of the iron-based base material with y3 is extremely effective in providing the appropriate surface friction properties required for the cover over a long period of time, but as mentioned above, ceramic spraying directly onto the iron-based base material is extremely effective. If No. 11 is formed, the adhesion is weak and defects such as peeling are likely to occur, and since the ceramic sprayed layer has narrow pores, FJJ corrosion resistance cannot be expected. However, as mentioned above (↓4) When the ceramic sprayed 7G is brought into close contact with the ferrous base material through the corrosive metal sprayed layer, the ceramic sprayed layer will be held firmly enough to the ferrous base material. Furthermore, when such a ceramic sprayed IG is sealed with a resin-based 14-pore material, the pores existing in the ceramic sprayed layer can be closed without changing the appropriate surface roughness as described above. Combined with the dense corrosion-resistant metal sprayed layer provided on the surface, it provides sufficient protection for the iron-based surface, prevents the iron-based base material from being exposed to the external environment, and seals the resin-based pores. As in the case of forming a corrosion-resistant metal sprayed layer sealed with a material I', extremely excellent first corrosion resistance is obtained, and the characteristics necessary for the upper surface convex portion are satisfied.

Furthermore, in the cover lid of the present invention, the external drum debris on the upper surface is sealed with resin-based sealing LN at all times, and is substantially non-porous, so rainwater, dust, etc. There is little risk of the generation of contamination due to the intrusion of metals, etc., and as mentioned above, the iron base material is completely covered with a film and has good corrosion resistance. No way. Furthermore, both ceramics and corrosion-resistant gold aj:i 1.
It is chemically extremely stable and fS, and as mentioned above, the ceramic sprayed layer in the convex parts has excellent wear resistance and is less likely to cause defects such as peeling, and the corrosion-resistant metal sprayed layer in the concave parts. It is also less prone to defects such as wear and peeling. For this reason, the resin-based pore sealing material is made of transparent material.
Corrosion-resistant metal spraying JΔ is applied to the color or color of the ceramic sprayed layer composed of colored ceramics of a single color or multiple colors.
If the color is added to the upper surface of the cover plate, it is possible to maintain the original color tone for a long period of time without changing even in a harsh road surface environment.

Hereinafter, the present invention will be carried out in more detail based on Embodiment 1. This J
2.

The covering lid of the present invention is a covering lid placed on a road surface,
Examples include manhole covers for underground conduits such as water and sewage systems, electrical wiring, waste piping, and telephone lines, and covers placed on road surfaces such as covers for drainage ditches and other ditches. .

FIG. 1 is a sectional view schematically showing the structure of a manhole cover body, which is an embodiment of the cover cover according to the present invention.

In the manhole cover body of this embodiment, a corrosion-resistant metal sprayed layer Jc2 is formed over the entire surface of the pig iron base material 1 having an uneven pattern on its upper surface 5, and the corrosion-resistant metal sprayed layer 2 is coated with a corrosion-resistant metal sprayed layer 2. Furthermore, a monochromatic ceramic sprayed layer 3 is formed over the entire surface, and resin coating scraps 4 made of a transparent resin-based pore sealing material are further formed over the entire surface for sealing treatment. Therefore, the lower surface 5 of this manhole cover has f
3 A corrosion-resistant metal sprayed layer 2, a ceramic sprayed layer 3, and resin coating waste 4 are sequentially coated on the surface of a pig iron base metal 1.

In addition, in this manhole cover body, a corrosion-resistant metal sprayed layer 2 is formed on the entire surface of the casting base material on the lower surface 6 and the peripheral side surface 7, and the entire surface 1. An IM fat coating layer 4 made of a resin-based pore sealing material is formed to protect the surface of the base material.

Moreover, FIG. 2 shows another embodiment of the cover lid of the present invention (
FIG. 3 is a plan view schematically showing the structure of the pH groove cover body, and FIG. 3 is a sectional view of the same embodiment.

In the gutter cover according to Example 71, on the upper surface 15, a corrosion-resistant metal sprayed layer 12 is formed over the entire surface of the cast iron base material 11 on which the uneven pattern is formed, and the convex portions 1
8, a white ceramic sprayed layer 13a and a gray ceramic sprayed layer 13b are formed on the corrosion-resistant metal sprayed JΔ12, and a black ceramic sprayed layer 13c is formed on the fourth part 19, and sealing is applied over the entire area. A resin coating JΔ14 made of transparent f#JJD sealing FIJj is formed for hole processing. In this gutter cover body, the corrosion-resistant metal sprayed layer is
2. Ceramic sprayed layers 13a, 13b, 13c made of three types of colored ceramics are formed on the entire surface, and a transparent resin-based sealing material is used in the sealing treatment performed thereon. Moreover, the upper surface is colored in the three colors of the ceramic sprayed layers 13a, 13b, and 13c, and has a great design effect.

In addition, when trying to impart a design effect by coloring in this way, in the lower surface concave portion 19, the h
For example, instead of the ceramic sprayed layer 13c in the above embodiment, a metallic sprayed layer or a resin-based paint with a good color may be used, since the slip resistance and abrasion resistance in contact with passing objects are not a particular problem. It is also possible to form a paint film on the corrosion-resistant metal spray layer, and if a metal spray layer or a resin paint film is applied to the lower surface recess 19 in this way, the variation in coloring will be further expanded. .

In addition, in FIGS. 1 to 3, the corrosion-resistant metal sprayed layer 2.12
, the thicknesses of the ceramic sprayed layers 3.13a, 13b, 13c and the resin coating layer 4.14 are exaggerated.

As in the embodiment shown in FIG. 1 and FIGS. 2 and 3, the cover of the present invention has an iron-based base material, which satisfies the mechanical strength etc. originally required for the cover. At the same time, it is also preferable from an economic standpoint.

More specifically, iron-based base materials include cast iron and steel plates. For example, cast iron is used for manhole cover moss, and cast iron is used for side cover covers, etc. It is selected as appropriate depending on its use.The upper surface of this iron-based base material is provided with an uneven pattern in order to provide an uneven upper surface in the final product.

In the lid of the present invention, the entire upper surface of the iron-based base material having such an uneven pattern is first covered with a corrosion-resistant metal sprayed layer. A corrosion-resistant metal spray layer can be formed on the surface of a ferrous material using a conventionally known metal spraying method, and if necessary, the surface of the ferrous base material is subjected to pretreatment such as degreasing or blasting. After that, it is formed by thermally spraying a corrosion-resistant metal in the form of a wire or powder using a thermal spray gun or the like. In addition, specific examples of the corrosion-resistant metal constituting the corrosion-resistant metal sprayed layer include AN, Ni, Cr,
Examples include Zn and alloys thereof, but from an economical point of view, 8 to Ω alloys, Ni- to ρ alloys, Ni- to
Cr alloys are preferred. When constructing a corrosion-resistant metal sprayed layer as an alloy system consisting of multiple metals, it is of course possible to spray a wire or powder that has been made into such an alloy in advance, but it is also possible to spray the wire rod or powder that has been made into such an alloy in advance, but it is not possible to mix the powders of each component metal. An alloy-based thermal spray coating may be formed by thermal spraying at the same time. The thickness of the corrosion-resistant metal sprayed layer is not particularly limited, but is preferably 50 to 300 μm, more preferably 100 to 20 μm.
It is desirable that the thickness be in the range of 0 μm. That is, if the layer thickness is less than 50 μm, there will be a large number of open pores, which will cause problems. There is a strong possibility that the effect will not be obtained, and on the other hand,
This is because if the layer thickness exceeds 300 um, the GH becomes large, which is disadvantageous in terms of cost.

Furthermore, in at least the convex portion of the upper surface of the cover lid of the present invention, a ceramic spray nozzle is formed on the corrosion-resistant metal spray layer as in the embodiments and embodiments shown in FIGS. 1 and 2 and 3. There is. In other words, even on the upper surface of the cover, it is not necessarily necessary to form ceramic spray JG on the road surface (and on the four parts where there is little contact with traffic during construction, as in the embodiment shown in Fig. 1). A ceramic sprayed layer is placed on the corrosion-resistant metal sprayed layer (for example,
Thermal spraying using a known ceramic spraying method such as plasma spraying or thermal spraying 1. However, if there is a part (recess) where the ceramic sprayed layer is not formed as in the embodiment shown in FIG. 1, the ceramic sprayed layer 1. All you have to do is mask the affected areas. Furthermore, when forming ceramic sprayed layers of multiple colors as shown in FIGS. 2 and 3, step 6 first begins with step 1 as described above. Ceramic spraying of one color may be performed by masking areas other than the predetermined portions, and then this operation is sequentially repeated for the ceramic spraying layers of the remaining colors to form ceramic spraying layers of a plurality of colors.

Note that various types of ceramics can be used to form the ceramic sprayed layer; for example, f! When trying to give a trichromatic dynamic effect, A[2o
3. A that exhibits black or gray color! Q203 TiO
2. Ceramics such as AJ) 203-CQ which exhibits a blue color and ZrO2-Y203 which exhibits a pale yellow color are preferably used. Further, the N thickness of the ceramic sprayed layer is not particularly limited, but is preferably in the range of 100 to 300 μm, more preferably 150 to 200 μm. In other words, if the layer thickness is less than 100 μm, the abrasion resistance will not be sufficient, and there is a risk that a suitable surface angle of 411 degrees cannot be obtained over the length of the long glue. This is because if it exceeds 300 μm, there is a strong possibility that it will be disadvantageous in terms of cost.

In the cover indigo of the present invention, the ceramic sprayed layer as described above, or the corrosion-resistant metal sprayed layer in areas where the ceramic sprayed layer is not formed, is sealed with a resin-based pore sealing material. This sealing treatment can be performed by applying a resin-based pore sealing material to the surface of the ceramic sprayed layer or the corrosion-resistant metal sprayed layer using a method such as brushing, spraying, or circular coating. ↓; When one-hole treatment is performed, a film of resin-based sealing material is formed on one ceramic sprayed layer or one corrosion-resistant metal sprayed layer, as in the embodiment shown in Fig. 1 or Figs. 2 and 3. However, as long as the pores in the ceramic sprayed layer or the corrosion-resistant metal sprayed layer are blocked by the resin-based pore-sealing material, a film of the resin-based pore-sealing material is not particularly necessary; for example, In the upper surface convex part,
There is no problem even if the sealing film is worn out due to contact with a passing body. Examples of such resin-based pore sealing materials include vinyl chloride resins, acrylic resins, polyester resins, polyurethane resins, melamine resins, epoxy resins, silicone resins, and polymer blends thereof. can be mentioned, but
As mentioned above, when attempting to color the cover by the color of the ceramic sprayed Jm or the ceramic sprayed layer and the corrosion-resistant metal sprayed layer, it is necessary to use a transparent resin sealant. . Furthermore, the resin coating layer formed on the ceramic sprayed layer or the corrosion-resistant metal sprayed layer in the embodiment shown in FIG. 1 or FIGS. As long as the pores in the ceramic sprayed layer or the corrosion-resistant metal sprayed layer are blocked by the resin-based sealing material, the M thickness is not particularly limited, but It is desirable that the thickness be about 5 to 100 μm, more preferably about 30 to 60 μm.

That is, if the N thickness is less than 5 μm, there is a risk that the pores in the ceramic sprayed layer or the corrosion-resistant metal sprayed layer may not be sufficiently closed.
If the surface roughness exceeds the above, the moderate surface roughness provided by the ceramic sprayed layer on the upper surface, especially on the convex portion of the upper surface, will be buried by the resin coating layer, and in the initial stage of construction, the cover lid will be relatively rough. It is a lick that may become slippery.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example J - After the surface of a cast iron test piece substrate was subjected to +I treatment, a nickel-aluminum powder was sprayed using a gas plasma gun to form a nickel-aluminum sprayed layer with a layer thickness of 200 μm. . Next, a gray ceramic (gray alumina) was thermally sprayed with a gas plasma gun.
．． , a layer thickness of 150 on the nickel-aluminum sprayed layer.
A ceramic sprayed layer with a μr opening was formed. Furthermore, sealed L
For treatment, a transparent epoxy resin prepolymer was applied, dried and cured to form an epoxy resin pore sealing film layer with a layer thickness of 60 μm. The abrasion resistance and slip resistance value (BPN) of the obtained test piece were measured under the conditions shown below.
The stain resistance and adhesion of the film were tested by yS. Results first
Shown in the table.

Comparative Example 1 For comparison, a cast iron test piece substrate whose surface was coated with epoxy resin (thickness: about 60 μm) was prepared. The resulting test piece was examined for abrasion resistance, slip resistance (BPN), stain resistance, and film adhesion in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2 For comparison, after blasting the surface of a cast iron test piece substrate, a gray ceramic (gray alumina) was heated using a gas plasma gun G? A ceramic sprayed layer with a thickness of 150 μm was directly formed on the surface of a cast iron substrate. Regarding the obtained test piece, Example 1
In the same manner as above, abrasion resistance, slip resistance (BPN), stain resistance, and film adhesion were investigated. The results are shown in Table 1.

Abrasion Test Using a ball-on-disc device, a steel ball was rotated on each of the obtained test specimens at a pressure of 3° OKg and a rotational speed of 7 rpm to measure the average wear depth.

Measuring test for slip resistance (BPN) The surface of the test piece was pre-wetted with water, and then the slip resistance was measured using a British porta-pull skid resistance tester.

Stain test Ink stain: black ink on the surface of the test piece per 1-cm2
The sample was applied at a rate of cc, washed with water after 5 minutes, and the degree of stain remaining on the surface of the test piece was visually evaluated. In addition, the evaluation is ◎ if it is in very good condition with almost no stains, ◎ if it is in good condition without stains, Δ if it is somewhat conspicuously contaminated.
The evaluation was carried out on a four-level scale, with "×" indicating extremely large amounts of dirt.

Rubber tire slip stains: Rub a rubber tire fragment on the surface of the test piece by applying a load of about 1 kg and rubbing it back and forth 10 times, then washing with water using a scrub brush, and then remove any remaining dirt on the surface of the test piece. The degree of 9 was evaluated visually. Note that the evaluation was performed using the same four-level evaluation as above.

Muddy water stain: Muddy water was poured onto the surface of the test piece, and the degree of stain remaining on the surface of the test piece after washing with water was visually evaluated. Note that the evaluation was performed using the same four-level evaluation as above.

A tensile test was conducted according to JIS H8666 to examine the adhesion of the film formed on the substrate surface.

Average wear depth (μm) Adhesion Example 1 0
0'OO104 Hishaaki120 0 5 15 86
Table 1 39 ◎ ◎ ◎ 12.5 ◎ ◎ ◎ 45× Δ Δ (Effect of the invention) As stated above, 1. This advantage of the present invention is that the upper surface of the road surface is uneven. The cover lid is arranged in this way, and on the upper surface, a corrosion-resistant metal sprayed layer is formed over the entire surface of the iron-based base material, and at least in the convex portions, a corrosion-resistant metal sprayed layer is formed on the corrosion-resistant metal sprayed layer. It is characterized by having a ceramic sprayed layer formed on it and then sealing the entire surface with a resin-based sealing material, so it has high surface friction and good wear resistance. Therefore, when placed on the road surface, it exhibits a high anti-slip effect over a long period of time, and furthermore, when it is painted, it can maintain the original color tone for a long period of time. It is a great cover both functionally and aesthetically.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view schematically showing the structure of one embodiment of the cover moss of the present invention, and FIG. 2 is a plan view schematically showing the structure of another embodiment of the cover lid of the present invention. FIG. 3 is a sectional view of the same implementation. 1...i iron base material, 2,12...corrosion-resistant metal sprayed layer,
3.13a, 13b, i3c...-ceramic sprayed layer, 4.14...resin coating layer, 5.15...upper surface,
6... Lower surface, 7... Peripheral side surface, 8, 18...
・Protrusion, 9.19-0. Recessed portion, 11... Steel plate base material. Patent applicant Nippon Steel Corporation, 1 as agent 1't-fill soil 8 1) Mikio (et al.)
1 person)

Claims (2)

[Claims] (1) A cover lid placed on a road surface with an uneven upper surface, in which a corrosion-resistant metal sprayed layer is formed over the entire surface of the iron base material on the upper surface, and at least on the convex portions. A cover lid characterized in that a ceramic sprayed layer is formed on the corrosion-resistant metal sprayed layer, and further, the entire surface is sealed with a resin-based pore sealing material. (2) The cover according to claim 1, wherein the ceramic sprayed layer is made of colored ceramics of a single color or a plurality of colors, and a transparent resin-based sealing material is used as the resin-based sealing material.