Coating fixing device special for film-coated anti-corrosion steel strand

Abstract

The utility model relates to a coating fixing device special for a coated anti-corrosion steel strand. The utility model discloses a coating fixing device special for a film-coated anti-corrosion steel strand. The coating fixing device is a split barrel, and three positioning holes are formed in the coating fixing device. The first positioning hole and the second positioning hole are both provided with walking positioners, the walking positioners are made of nylon materials, the diameter of the walking positioners is the same as that of the steel strand body, and bearing bases are arranged outside the walking positioners. The film-coated anti-corrosion steel strand produced by the special coating fixing device for the film-coated anti-corrosion steel strand disclosed by the utility model is anti-corrosion in all directions, wear-resistant and good in ductility, and can change along with the change of the steel strand.

Description

Technical Field

[0001] The utility model relates to the technical field of steel strand anticorrosion, preparation and application, and in particular to a special coating and fixing device for film-coated anticorrosion steel strand. Background Art

[0002] Currently in coal mine support, there are many tunnels with harsh working and mining conditions, and there are often water immersion, moisture or corrosive gases. The oxygen in the air and the sulfur in the coal are elements that cause stress corrosion to metals, and the rust of anchor cables and anchors is very common.

[0003] Steel strand: In a humid and water-soaked environment, the surface of the anchor cable steel strand is very easy to combine with oxygen to form iron oxide FeO, Fe2O3, Fe3O4, FeS, FeSO2 and other molecules (red rust), which corrode the steel strand into pits and form a potential difference. The steel strand works under high stress, and stress corrosion and crack expansion occur rapidly, resulting in a rapid decrease in the ultimate load of the steel strand. When high ground pressure occurs, the steel strand will break, and even the entire bundle of steel strands will break.

[0004] In the prior art, the anti-corrosion steel strand is anti-corrosive by applying grease on the exposed parts of the steel strand and then covering it with a PE film. The anti-corrosion effect is poor, the ductility is poor, and it is easy to crack. With changes in temperature or humidity, the steel strand will produce a slight deformation, but the outer PE film will not extend or adjust accordingly, and will be damaged or worn, causing the steel strand to be partially exposed during use, making it impossible to prevent corrosion, corroding into pits, causing potential differences, or wire breakage and fracture, etc., which are serious hazards.

[0005] Therefore, a special coating and fixing device for coated anti-corrosion steel strands is designed to solve the above problems. Summary of the invention

[0006] In order to overcome the above disadvantages, the utility model provides a coating and fixing device specially used for coating anti-corrosion steel strands.

[0007] A coating fixture for coated anticorrosive steel strand is a split barrel with three positioning holes inside; the first two positioning holes, namely the first positioning hole and the second positioning hole, are both equipped with a travel positioner, the travel positioner is made of nylon and has the same diameter as the steel strand body, and a bearing base is installed outside the travel positioner;

[0008] The third positioning hole is a coating thickness positioning hole, and third positioning holes with different apertures can be set, and the third positioning hole is made of metal;

[0009] A closed bin body is located between the second positioning hole and the third positioning hole, and a feeding port is arranged on the closed bin body and is sealed with screws;

[0010] A movable baffle is arranged at the closed warehouse body.

[0011] A coated anti-corrosion steel strand, comprising a steel strand body, wherein the steel strand body is coated with an anti-corrosion coating;

[0012] The anti-corrosion coating is wrapped around the outer surface of the steel strand body at 360° without dead angles;

[0013] The anti-corrosion coating is seamlessly attached to the outer surface of the steel strand body;

[0014] The material of the anti-corrosion coating is polyurethane-modified epoxy resin composite alloy.

[0015] A mining anti-corrosion support mechanism for coated anti-corrosion steel strands includes the coated steel strands, one end of the coated steel strands is inserted into a supporting layer, the other end of the coated steel strands is covered with an anchor, the anchor includes an outer anchor ring and an inner clip, both ends of the anchor are covered with a first protective cover and a second protective cover, the other end of the coated steel strands passes through the second protective cover, the clip, the first protective cover and the supporting layer in sequence; the first protective cover is covered with a pad; the pad is pressed against the outer surface of the supporting layer.

[0016] The beneficial effects of the utility model are:

[0017] The utility model discloses a coated anti-corrosion steel strand, the anti-corrosion coating made of polyurethane modified epoxy resin composite alloy, which fully covers the steel strand without gaps, can be all-round anti-corrosion, wear-resistant, and has good ductility, and can change with the steel strand without cracking or breaking, thereby increasing the service life of the steel strand.

[0018] The preparation process of the film-coated anti-corrosion steel strand described in the utility model has simple, clear and reasonable manufacturing process steps.

[0019] A coated anti-corrosion steel strand is used in a mine anti-corrosion support mechanism.

[0020] The mining anti-corrosion support mechanism has the effects of firm support, corrosion resistance, durability and good ductility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a coated anti-corrosion steel strand;

[0022] Figure 2 It is a cross-sectional view of a coated anti-corrosion steel strand;

[0023] Figure 3 It is a structural diagram of the anti-corrosion support mechanism for mining;

[0024] in:

[0025] 1-Steel strand body; 2-Anti-corrosion coating;

[0026] 3-clip; 4-anchor ring; 5-lower protective cover; 6-upper protective cover; 7-base plate; 8-coated steel strand; 9-support layer. DETAILED DESCRIPTION

[0027] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings.

[0028] Example

[0029] A coated anti-corrosion steel strand, comprising a steel strand body 1, wherein the steel strand body 1 is coated with an anti-corrosion coating 2;

[0030] The anti-corrosion coating 2 is wrapped around the outer surface of the steel strand body 1 at 360° without dead angles;

[0031] The anti-corrosion coating 2 is seamlessly attached to the outer surface of the steel strand body 1;

[0032] The material of the anti-corrosion coating 2 is polyurethane-modified epoxy resin composite alloy.

[0033] A preparation process of a coated anti-corrosion steel strand comprises the following steps:

[0034] Step 1: Fix

[0035] A special coating fixture is used to fix the steel strand body 1 and wait for coating;

[0036] Step 2: Ingredients

[0037] 1. Preparation of polyurethane prepolymer:

[0038] Raw material components and ratios of polyurethane prepolymers:

[0039]

[0040]

[0041] Preparation method of polyurethane prepolymer: weigh the formula amount of polycaprolactone diol and halogen-free flame-retardant polyester polyol and dehydrate them under vacuum at 110°C for 2h. Then cool to 50°C, add toluene-2,4-diisocyanate under stirring, react at 70±5°C for 2.5h, then add liquefied diphenylmethane diisocyanate, react at 70±5°C for 2h, and then cool to obtain polyurethane prepolymer;

[0042] 2. Preparation of polyurethane modified epoxy resin polymer A:

[0043] Raw material components and proportions of polyurethane modified epoxy resin polymer A:

[0044] Polyurethane prepolymer 20-40 parts

[0045] Mix 60-80 parts of epoxy resin liquid

[0046] Preparation method of polyurethane modified epoxy resin polymer A:

[0047] Put the polyurethane prepolymer in the formula into the reaction kettle, add the mixed epoxy resin liquid under stirring, heat it to 80±5℃ and keep it warm for 3h. During the heat preservation period, turn on the condensing device to prevent the loss of volatile components. After the reaction and heat preservation are completed, cool it to 50℃ to obtain the high polymer polyurethane modified epoxy resin component A;

[0048] 3. Preparation of curing agent component B:

[0049] Raw material components and proportions of curing agent B component:

[0050]

[0051]

[0052] Preparation method of curing agent B component:

[0053] Nano magnesium hydroxide, nano aluminum oxide, graphene, titanium alloy polymer and dispersant are dispersed in proportion at a high speed of 1800 r / min for 60 minutes, and then put into a nano grinder for grinding, and aromatic amine curing agent and imidazole curing agent are mixed together to obtain curing agent component B;

[0054] 4. The high polymer polyurethane modified epoxy resin component A and the curing agent component B are mixed in a ratio of 10:1 and then cured at high temperature to obtain a coating.

[0055] Step 3: Painting

[0056] Polyurethane modified epoxy resin polymer is a two-component coating. When painting, the two components should be weighed and mixed according to the specified ratio and fully stirred before use.

[0057] After the coating obtained in the second step is fully stirred, it is poured into the closed bin through the feeding port on the special coating fixture described in the first step, and the screws are tightened to seal it; the bottom movable baffle is opened, and the device is pushed along the steel strand body 1 at a uniform speed using a manual or electric traction device, and the coating is evenly coated on the steel strand body 1 through the positioning hole to form an anti-corrosion coating 2;

[0058] Step 4: Disassembly and Cleaning

[0059] After coating, the coated steel strand 8 is obtained, the fixing screws on the special coating fixture are opened, the special coating fixture is removed from the coated steel strand 8, and the residual paint in the closed bin is cleaned.

[0060] Preferably, the special coating fixture is a split barrel, and is provided with three positioning holes; the first two positioning holes, namely the first positioning hole and the second positioning hole, are both equipped with a travel positioner, the travel positioner is made of nylon, and has the same diameter as the steel strand body 1, and the travel positioner is externally provided with a bearing base;

[0061] The third positioning hole is a paint thickness positioning hole, and third positioning holes with different apertures can be set. The third positioning hole is made of metal and is fixed to the overall bottom of the special coating fixture;

[0062] A closed bin body is located between the second positioning hole and the third positioning hole, and a feeding port is arranged on the closed bin body and is sealed with screws.

[0063] Preferably, a movable baffle is provided at the closed bin body of the special painting fixture to prevent leakage when paint is added.

[0064] When in use, the two separate parts of the special coating fixture are combined onto the steel strand body 1, so that the steel strand body 1 is correctly inserted between the three positioning holes, and the special coating fixture is fastened by screws.

[0065] The special coating fixture is customized according to the specifications of the steel cable to be processed, and the coating is even and dense. Pinholes, bubbles and other coating defects are avoided. The closed bin volume is customized according to the needs to avoid material waste.

[0066] Preferably, the mixed epoxy resin liquid is a 60% resin liquid of one or two mixed solid epoxy resins with an epoxy value of 0.03-0.2.

[0067] Preferably, the aromatic amine curing agent is a mixture of one or more of Aradur 5200, 3,3'-dichloro-4,4'-diaminodiphenylmethane, DDM, etc.

[0068] Preferably, the imidazole curing agent is a mixture of one or more of 2-ethyl-4-methylimidazole, 2-methylimidazole and propylene oxide butyl ether adduct.

[0069] A coated anti-corrosion steel strand is used in a mine anti-corrosion support mechanism.

[0070] The anti-corrosion support mechanism for mining includes a coated steel strand 8, one end of which is inserted into a supporting layer 9, and the other end of the coated steel strand 8 is covered with an anchor, and the anchor includes an outer anchor ring 4 and an inner clip 3, and both ends of the anchor are covered with a first protective cover 6 and a second protective cover 5, and the other end of the coated steel strand 8 passes through the second protective cover 5, the clip 3, the first protective cover 6 and the supporting layer 9 in sequence; the first protective cover 6 is covered with a pad 7; the pad 7 is pressed against the outer surface of the supporting layer 9.

[0071] Anchor: Under normal circumstances, the clips in the anchor can continue to follow up with the ground pressure to increase the holding force. However, in a humid environment, the anchor and the clips are easily corroded and adhered due to rust. When ground pressure occurs, the clips cannot follow up, resulting in anchoring and thread slippage, which brings great hidden dangers to the safety of support production and threatens the lives of miners at all times.

[0072] Anti-corrosion principle:

[0073] The utility model uses polyurethane prepolymer to toughen and modify epoxy resin, and uses polycaprolactone diol, halogen-free flame-retardant polyester polyol, toluene-2,4-diisocyanate, and liquefied diphenylmethane diisocyanate as raw materials for synthesizing polyurethane prepolymer. The isocyanate group in the polyurethane prepolymer can react with the hydroxyl group in the epoxy resin, and will not have a significant negative impact on the strength while toughening and modifying the epoxy resin. The polyurethane has a high polarity and a high bonding strength to the steel strand. The polymer A component is obtained.

[0074] The utility model uses aromatic amine medium- and high-temperature curing agents (such as Aradur 5200, 3,3'-dichloro-4,4'-diaminodiphenylmethane, DDM and other one or more mixtures) and imidazole curing agents as crosslinking agents, and uses nano magnesium hydroxide, nano aluminum oxide, graphene and titanium alloy polymer to prepare black alloy slurry through nano grinding technology, and mechanically mixes the prepared alloy slurry with imidazole curing agent and 3,3'-dichloro-4,4'-diaminodiphenylmethane to prepare component B, and finally mixes the modified polymer component A with the alloy component B in a certain proportion and then cures at high temperature to obtain a steel strand anticorrosive coating with a certain extension.

[0075] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0076] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A coating and fixing device for coated anti-corrosion steel strands, characterized in that: The special coating fixture is a split barrel and has three positioning holes inside; the first two positioning holes, namely the first positioning hole and the second positioning hole, are both equipped with a travel positioner, the travel positioner is made of nylon and has the same diameter as the steel strand body (1), and a bearing base is installed outside the travel positioner; The third positioning hole is a coating thickness positioning hole, and third positioning holes with different apertures can be set, and the third positioning hole is made of metal; A closed bin body is located between the second positioning hole and the third positioning hole, and a feeding port is arranged on the closed bin body and is sealed with screws; A movable baffle is arranged at the closed warehouse body.

2. A coating and fixing device for coated anti-corrosion steel strand according to claim 1, characterized in that: A coated anti-corrosion steel strand, comprising a steel strand body (1), the steel strand body (1) being coated with an anti-corrosion coating (2); The anti-corrosion coating (2) is wrapped around the outer surface of the steel strand body (1) at 360° without any dead angle; The anti-corrosion coating (2) is seamlessly attached to the outer surface of the steel strand body (1); The material of the anti-corrosion coating (2) is a polyurethane-modified epoxy resin composite alloy.

3. A coating and fixing device for coated anti-corrosion steel strand according to claim 2, characterized in that: A mine anti-corrosion support mechanism for use with a coated anti-corrosion steel strand, the mine anti-corrosion support mechanism comprising a coated steel strand (8), one end of the coated steel strand (8) being inserted into a support layer (9), the other end of the coated steel strand (8) being covered with an anchor, the anchor comprising an outer anchor ring (4) and an inner clip (3), both ends of the anchor being covered with a first protective sleeve (6) and a second protective sleeve (5), the other end of the coated steel strand (8) passing through the second protective sleeve (5), the clip (3), the first protective sleeve (6) and the support layer (9) in sequence; the first protective sleeve (6) being covered with a pad (7); the pad (7) being pressed against the outer surface of the support layer (9).

Images