Self-adaptive anti-corrosion coating of underground coal mine metal anchor rod, preparation equipment and preparation method of self-adaptive anti-corrosion coating

Abstract

The invention discloses an underground coal mine metal anchor rod self-adaptive anti-corrosion coating, preparation equipment and a preparation method thereof.The self-adaptive anti-corrosion coating comprises an anti-corrosion layer, a first wear-resisting layer is formed on the anti-corrosion layer, and a functional layer is formed on the end face, away from the anti-corrosion layer, of the first wear-resisting layer; a second wear-resistant layer is formed on one end surface, far away from the first wear-resistant layer, of the functional layer, the second wear-resistant layer comprises a polymer and functional particles, the functional particles are uniformly distributed in the polymer, each functional particle comprises a shell, a slow-release layer is formed on the outer wall of each shell, and the shells are filled with a nutrient medium and flora. The nutrient medium is used for providing nutrients for the flora. Compared with the prior art, according to the self-adaptive anti-corrosion coating of the underground coal mine metal anchor rod, the preparation equipment and the preparation method of the self-adaptive anti-corrosion coating, the self-adaptive anti-corrosion coating induces calcium carbonate in concrete to precipitate through a medium in the functional layer, and the problem of chloride ion permeation can be solved.

Description

Technical Field

[0001] The invention belongs to the field of material science and technology, and in particular relates to an adaptive anti-corrosion coating for metal anchors in underground coal mines, a preparation device and a preparation method thereof. Background Art

[0002] In recent years, with the continuous advancement of coal mining technology, metal bolts have played an increasingly important role as an important means of reinforcing the surrounding rock of mining tunnels. Metal bolts are drilled into the surrounding rock, then installed in the metal bolt holes, and combined with physical fixatives such as concrete to consolidate with the surrounding rock walls, effectively preventing the deformation and collapse of the surrounding rock, thereby ensuring the safe operation of coal mines.

[0003] However, the complex production environment has put forward higher requirements on the corrosion problem of metal anchors. Although a layer of anti-corrosion coating is applied on the surface of the metal anchor, due to the inherent activity of the metal material and the influence of complex environmental conditions, especially after the metal anchor comes into contact with concrete, factors such as carbonization of concrete and chloride ion erosion will significantly aggravate the corrosion process of the metal anchor. These chemical and electrochemical corrosion reactions will continue to accumulate, resulting in a reduction in the cross-sectional area and strength of the metal anchor, and may eventually lead to complete failure of the metal anchor. Therefore, in the design and construction of metal anchors, effective protective measures must be taken to extend the service life of the metal anchor and ensure the safe operation of the coal mine.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide an adaptive anti-corrosion coating for metal anchors in underground coal mines, a preparation device and a preparation method thereof, which can solve the technical problems raised in the above-mentioned background technology.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0007] An adaptive anti-corrosion coating for metal anchors in underground coal mines, comprising an anti-corrosion layer, a first wear-resistant layer formed on the anti-corrosion layer, a functional layer formed on an end face of the first wear-resistant layer away from the anti-corrosion layer, a second wear-resistant layer formed on an end face of the functional layer away from the first wear-resistant layer, the second wear-resistant layer comprising a polymer and functional particles, the functional particles being uniformly distributed in the polymer, the functional particles comprising an outer shell, a sustained-release layer formed on an outer wall of the outer shell, the outer shell being filled with a nutrient medium and a bacterial community, the nutrient medium being used to provide nutrients to the bacterial community.

[0008] In one or more embodiments of the present invention, the bacterial community is Bacillus pasteurianus, and the nutrient medium is one or more combinations of a carbon source, a nitrogen source, a calcium source and trace elements.

[0009] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0010] A device for preparing an adaptive anti-corrosion coating for metal anchors in underground coal mines, comprising a grinding mechanism, the grinding mechanism comprising a grinding table, a pretreatment mechanism and a grinding assembly being installed on the grinding table, a shell matching the pretreatment mechanism and the grinding assembly being installed on the grinding table, a first conveying mechanism being installed at one end of the grinding table close to the pretreatment mechanism, the first conveying mechanism conveys the metal anchor to one end of the pretreatment mechanism in a rotating forward manner, a receiving mechanism being installed at one end of the grinding table close to the grinding assembly, the grinding assembly comprising an upper shell and a lower shell, the upper shell and the lower shell forming a grinding chamber, a shot blaster matching the first cavity being fixedly connected to the upper shell, a material recovery mechanism matching the second cavity being fixedly connected to the lower shell, a paint spraying mechanism for preparing an adaptive anti-corrosion coating on the surface of the metal anchor being installed between the receiving mechanism and the grinding mechanism.

[0011] In one or more embodiments of the present invention, the first conveying mechanism includes a front conveying frame, a pair of first slide grooves are opened on the front conveying frame, a first support frame matching the first slide grooves is slidably connected to the front conveying frame, a first connecting rod is rotatably connected between the pair of first support frames, a first rubber wheel is fixedly connected to the first connecting rod, and a first driven wheel matching the first rubber wheel is fixedly connected to the front conveying frame.

[0012] In one or more embodiments of the present invention, a pair of second slide grooves matching the pretreatment mechanism are provided on the grinding table, a second support frame is slidably connected in the second slide groove, a second bolt matching the bottom wall of the second slide groove is fixedly connected to the second support frame, a second connecting rod is rotatably connected between the pair of second support frames, a plurality of second rubber wheels are fixedly connected to the second connecting rod, a second driven wheel matching the second rubber wheel is fixedly connected to the grinding table, a clutch is installed between the second connecting rod and the first connecting rod, and a driving mechanism for driving the second driven wheel to rotate is fixedly connected to the grinding table.

[0013] In one or more embodiments of the present invention, the pretreatment mechanism includes a plurality of support rods, the support rods are fixedly connected to the shell, a mounting plate is slidably connected to the support rods, a first motor is mounted on the mounting plate, a cleaning brush is fixedly connected to the output shaft of the first motor, and a hydraulic cylinder is installed between the mounting plate and the inner wall of the shell.

[0014] In one or more embodiments of the present invention, the grinding assembly includes a shot box, a shot output pipe is fixedly connected between the shot box and the shot blaster, a first material pump is fixedly connected to the shot output pipe, a shot recovery pipe matching the first cavity is fixedly connected to the shot box, and a second material pump is installed on the shot recovery pipe.

[0015] In one or more embodiments of the present invention, the material recovery mechanism includes a third material pump, the inlet end of the third material pump is fixedly connected to a material recovery pipe, the end of the material recovery pipe away from the third material pump is communicated with the second cavity, a hot air recovery pipe is fixedly connected between the shell and the material recovery pipe, a first filter is installed on the hot air recovery pipe, the output end of the third material pump is fixedly connected to a first material output pipe, the end of the first material output pipe away from the third material pump is fixedly connected to a filtering mechanism, the filtering mechanism includes a box body, the box body is provided with a feed port, a first discharge port and a second discharge port, the first material output pipe is connected to the feed port, the second material output pipe is fixedly connected between the second discharge port and the paint spraying mechanism, the end of the paint spraying mechanism away from the polishing mechanism is fixedly connected to a first drying cylinder, a first hot air conveying pipe is installed between the first discharge port and the first drying cylinder, and a second filter matching the first discharge port is installed on the box body.

[0016] In one or more embodiments of the present invention, the paint spraying mechanism includes a paint spraying box, a plurality of paint spraying chambers are arranged on the paint spraying box, a plurality of nozzles matching the paint spraying chambers are fixedly connected to the paint spraying box, a second through hole matching the grinding mechanism is arranged on the paint spraying box, and the paint spraying mechanism also includes a plurality of paint supply systems matching the nozzles, and the paint supply systems provide paint matching the adaptive anti-corrosion coating to the plurality of nozzles.

[0017] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0018] A method for preparing an adaptive anti-corrosion coating for a metal anchor in an underground coal mine comprises the following steps:

[0019] S1. Preparation of functional particles:

[0020] S1.1, mixing the nutrient medium with the bacterial flora to form an aqueous phase;

[0021] S1.2, mixing the water phase and the oil phase to form a water-oil emulsion;

[0022] S1.3, adding sodium alginate solution to the water-oil emulsion, cross-linking and curing by calcium chloride to form a shell on the outer wall of the water-oil emulsion;

[0023] S1.4, coating a sustained-release medium on the outer surface of the shell to form a sustained-release layer;

[0024] S2. Preparation of functional layer:

[0025] S2.1, select one or more combinations of epoxy resin, polyurethane, and acrylic resin as the polymer;

[0026] S2.2, adding a dispersant to the polymer, and uniformly dispersing the functional particles in the polymer at a ratio of 5% to 20% to form a mixture of a functional layer;

[0027] S3. Preparation of anti-corrosion layer:

[0028] S3.1. Select epoxy resin or polyurethane as the anti-corrosion layer of the metal anchor;

[0029] S3.2, evenly coating the epoxy resin or polyurethane on the surface of the metal anchor to form an anti-corrosion layer;

[0030] S4, preparing the first wear-resistant layer:

[0031] S4.1. Select one or more combinations of metal, ceramic or polymer as the material of the first wear-resistant layer;

[0032] S4.2, uniformly coating a first wear-resistant layer on the anti-corrosion layer;

[0033] S5, coating the functional layer: uniformly coating the mixture of the functional layer on the first wear-resistant layer;

[0034] S6, preparing the second wear-resistant layer:

[0035] S6.1. Select one or more combinations of metal, ceramic or polymer as the material of the second wear-resistant layer;

[0036] S6.2, uniformly coating a second wear-resistant layer on the functional layer;

[0037] S7, curing and post-processing.

[0038] Compared with the prior art, the adaptive anti-corrosion coating, preparation equipment and preparation method of underground coal mine metal anchor of the present invention have the following advantages:

[0039] 1) The adaptive anti-corrosion coating can improve the problem of chloride ion penetration by inducing calcium carbonate precipitation in concrete using the medium in the functional layer. The calcium carbonate precipitation forms a dense protective layer in the concrete that can effectively block the penetration of chloride ions.

[0040] 2) The preparation equipment of the adaptive anti-corrosion coating can prepare the adaptive anti-corrosion coating of the metal anchor rod on the metal anchor rod. Before the preparation, the metal anchor rod is pre-treated so that the adaptive anti-corrosion coating of the metal anchor rod can better fit the metal anchor rod. In addition, the residue generated by the metal anchor rod treatment is used as the preparation material of the second wear-resistant layer, which can save costs. At the same time, the heat generated by the equipment for treating the metal anchor rod is used to dry the adaptive anti-corrosion coating of the metal anchor rod, which can also save preparation costs and be energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A cross-sectional view of an adaptive anti-corrosion coating for an underground coal mine metal anchor in one embodiment of the present invention;

[0043] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0044] Figure 3 is a cross-sectional view of a functional particle in one embodiment of the present invention;

[0045] Figure 4 The structure of an adaptive anti-corrosion coating preparation device for underground coal mine metal anchor in one embodiment of the present invention is schematically shown. Figure 1 ;

[0046] Figure 5 The structure of an adaptive anti-corrosion coating preparation device for underground coal mine metal anchor in one embodiment of the present invention is schematically shown. Figure 2 ;

[0047] Figure 6 A schematic diagram of the partial structure of an adaptive anti-corrosion coating preparation device for underground coal mine metal anchors in one embodiment of the present invention Figure 1 ;

[0048] Figure 7 A schematic diagram of the partial structure of an adaptive anti-corrosion coating preparation device for underground coal mine metal anchors in one embodiment of the present invention Figure 2 ;

[0049] Figure 8 for Figure 7 Schematic diagram of the structure at B in the middle;

[0050] Fig. 9 for Figure 7 Schematic diagram of the structure at C in the middle;

[0051] Fig.10 for Figure 7 Schematic diagram of the structure at D in the middle;

[0052] Fig.11 A schematic diagram of the partial structure of an adaptive anti-corrosion coating preparation device for underground coal mine metal anchors in one embodiment of the present invention Figure 3 ;

[0053] Fig.12 A partial cross-sectional view of a grinding mechanism in one embodiment of the present invention Figure 1 ;

[0054] Fig.13 A partial cross-sectional view of a grinding mechanism in one embodiment of the present invention Figure 2 ;

[0055] Fig.14 It is a structural schematic diagram of a grinding mechanism in one embodiment of the present invention;

[0056] Fig.15 It is a structural schematic diagram of a material recovery mechanism in one embodiment of the present invention;

[0057] Fig.16 It is a structural schematic diagram of a filtering mechanism in one embodiment of the present invention;

[0058] Fig.17 It is a partial cross-sectional view of an apparatus for preparing an adaptive anti-corrosion coating for metal anchor bolts in an underground coal mine according to an embodiment of the present invention;

[0059] Fig.18 It is a structural schematic diagram of a receiving mechanism in one embodiment of the present invention;

[0060] Fig.19 It is a schematic diagram of the use state of the receiving mechanism in one embodiment of the present invention;

[0061] Fig. 20 It is a partial cross-sectional view of a paint spraying mechanism in one embodiment of the present invention.

[0062] Description of main reference numerals:

[0063] 1. Anti-corrosion layer; 2. First wear-resistant layer; 3. Functional layer; 4. Second wear-resistant layer; 5. Polymer; 6. Functional particles; 601. Sustained release layer; 602. Shell; 603. Nutrient medium; 604. Bacteria;

[0064] 7. First conveying mechanism; 8. Front conveying frame; 801. First slide; 9. First support frame; 901. First support block; 902. Second support block; 903. First bolt; 904. Support part; 10. First connecting rod; 11. First rubber wheel; 12. First driven wheel; 13. Grinding mechanism; 14. Grinding table; 1401. Second slide; 1402. Third slide; 1403. Fourth slide; 15. Shell; 1501. Observation port; 16. Cover; 17. Second conveying mechanism; 18. Second support frame; 19. First 2. Second bolt; 20. Second connecting rod; 21. Second rubber wheel; 22. Second driven wheel; 23. Clutch; 24. Pretreatment mechanism; 25. Support rod; 26. Mounting plate; 27. Hydraulic cylinder; 28. First motor; 29. ​​Cleaning brush; 30. Grinding assembly; 31. Upper shell; 32. Lower shell; 33. Connecting ear; 34. Third bolt; 35. Stop block; 36. Filter plate; 37. Fourth bolt; 38. First cavity; 39. Second cavity; 40. First through hole; 41. Shot blaster; 42. Shot box; 43. Shot Output pipe; 44, first material pump; 45, projectile recovery pipe; 46, second material pump; 47, mounting platform; 48, fifth bolt; 49, screw; 4901, handle; 50, material recovery mechanism; 51, third material pump; 52, material recovery pipe; 53, first material output pipe; 54, hot air recovery pipe; 55, first filter; 56, filtering mechanism; 57, box; 58, feed port; 59, first discharge port; 60, second discharge port; 61, paint spraying mechanism; 62, paint spraying box; 63, paint spraying chamber; 64, paint spraying cover; 65. Nozzle; 66. Paint supply system; 67. Paint delivery pipe; 68. Second material output pipe; 69. First drying cylinder; 6901. Heat collecting chamber; 6902. Hot air output hole; 70. First hot air delivery pipe; 71. Second through hole; 72. Receiving mechanism; 73. Rear delivery rack; 7301. Material discharge port; 74. Slide; 75. Electric slider; 76. Robotic arm; 77. Memory metal arc plate; 78. Driving wheel; 79. Third driven wheel; 80. Second filter; 81. Second drying cylinder; 82. Second hot air delivery pipe. DETAILED DESCRIPTION

[0065] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0066] like Figure 1 to Figure 3As shown, an adaptive anti-corrosion coating for a metal anchor in an underground coal mine in one embodiment of the present invention includes an anti-corrosion layer 1, a first wear-resistant layer 2 is formed on the anti-corrosion layer 1, a functional layer 3 is formed on the first wear-resistant layer 2, and a second wear-resistant layer 4 is formed on the functional layer 3. The anti-corrosion layer 1 is an initial anti-corrosion coating, which plays an anti-corrosion role for the metal anchor. The first wear-resistant layer 2 is used to protect the anti-corrosion layer 1, so that the anti-corrosion layer 1 is not easily scratched, and the life of the anti-corrosion layer 1 is extended, thereby improving the service life of the metal anchor. The functional layer 3 can react with the concrete during use, and when pouring concrete, it can induce calcium carbonate precipitation and fill the pores in the concrete, thereby reducing water retention and accelerating drying. The second wear-resistant layer 4 can protect the functional layer 3, prevent the functional layer 3 from being bumped during transportation, and prevent the loss of the medium in the functional layer 3 due to bumps, thereby reducing the reaction between the functional layer 3 and the concrete, and reducing the drying effect of the functional layer 3 after contact with the concrete.

[0067] Among them, the problem of chloride ion penetration can be improved by using the medium in the functional layer 3 to induce calcium carbonate precipitation in concrete. Calcium carbonate precipitation forms a dense protective layer in concrete, which can effectively block the penetration of chloride ions. Specifically, calcium carbonate precipitation can fill the pores of concrete, reduce the permeability of concrete, and thus reduce the probability of chloride ions entering the interior of concrete. In addition, calcium carbonate precipitation can also reduce the penetration of carbon dioxide, capture carbon dioxide, reduce the impact of carbonization, delay the carbonization process, and effectively improve the carbonization problem of concrete. That is, calcium carbonate precipitation not only enhances the impermeability and chemical corrosion resistance of concrete, but also indirectly improves the durability of concrete. The calcium carbonate precipitation process can also neutralize some acidic substances, slow down the decline of pH value inside concrete, and protect steel bars from corrosion.

[0068] Specifically, Figure 1 to Figure 3 As shown, the functional layer 3 includes a polymer 5 and functional particles 6. The functional particles 6 are relatively evenly distributed in the polymer 5. The polymer 5 can be one or more combinations of epoxy resin, polyurethane, and acrylic resin. A dispersant, such as a silane coupling agent, is also added to the polymer 5, which can improve the dispersibility of the functional particles 6 in the polymer 5 and prevent the functional particles 6 from aggregating. The content of the functional particles 6 in the functional layer 3 is 5% to 20%, which can be specifically set according to the actual needs.

[0069] like Figure 1 to Figure 3 As shown, the functional particle 6 includes a shell 602, the outer wall of the shell 602 is formed with a slow-release layer 601, and the shell 602 is filled with a bacterial colony 604 and a nutrient medium 603. Among them, the bacterial colony 604 is Bacillus pasteurianus, and the nutrient medium 603 is one or more combinations of carbon sources, nitrogen sources, calcium sources and trace elements. The nutrient medium 603 provides nutrients for the survival of the bacterial colony 604.

[0070] The preparation method of the functional particles 6 is as follows: the nutrient medium 603 is mixed with the bacterial flora 604 to form an aqueous phase, the aqueous phase is mixed with an oil phase, the oil phase can be mineral oil, to form a water-oil emulsion, a sodium alginate solution is added to the water-oil emulsion, and the solution is cross-linked and solidified by calcium chloride to form a shell 602, and then a sustained-release medium is coated on the surface of the shell 602 to form a sustained-release layer 601.

[0071] A buffer may also be added into the shell 602 to maintain the stability of the pH value inside the functional particle 6 , thereby making the environment inside the functional particle 6 more suitable for the survival of the bacterial flora 604 .

[0072] The first wear-resistant layer 2 and the second wear-resistant layer 4 can be one or a combination of metal, ceramic, and polymer.

[0073] like Figure 4-5 As shown, an apparatus for preparing an adaptive anti-corrosion coating for a metal anchor in an underground coal mine in one embodiment of the present invention includes a grinding mechanism 13, which can process the metal anchor to form a rough surface on the surface of the metal anchor. A paint spraying mechanism 61 is fixedly connected to one end of the grinding mechanism 13. After the metal anchor passes through the grinding mechanism 13, it passes through the paint spraying mechanism 61. The paint spraying mechanism 61 can prepare an adaptive anti-corrosion coating on the rough surface of the metal anchor.

[0074] like Figures 4 to 8 As shown, the end of the grinding mechanism 13 away from the painting mechanism 61 is fixedly connected to the first conveying mechanism 7, and the metal anchor rod is fed to the end close to the grinding mechanism 13 in a rotating and forward manner through the first conveying mechanism 7. Among them, the first conveying mechanism 7 includes a front conveying frame 8, and the two ends of the front conveying frame 8 are respectively provided with a first slide groove 801, and the front conveying frame 8 is slidably connected to a first support frame 9 matching the first slide groove 801, and a first connecting rod 10 is rotatably connected between the two first support frames 9, and a plurality of first rubber wheels 11 are fixedly connected to the first connecting rod 10, and a first driven wheel 12 matching the first rubber wheel 11 is fixedly connected to the front conveying frame 8. The metal anchor rod is located between the first rubber wheel 11 and the first driven wheel 12, and is clamped by the first rubber wheel 11 and the first driven wheel 12. The first rubber wheel 11 is rotating. When the metal anchor rod is clamped between the first rubber wheel 11 and the first driven wheel 12, the first rubber wheel 11 rotates the metal anchor rod at high speed. At this time, the friction force will play a driving role, causing the metal anchor rod to have a forward tendency. At the same time, the centrifugal force generated by the high-speed rotation of the metal anchor rod will cause the metal anchor rod to try to move outward from the center. Under the combined action of these two forces, the metal anchor rod can move forward in a high-speed rotating state.

[0075] Specifically, Figures 4 to 8As shown, the first support frame 9 includes a first support block 901 and a second support block 902, the first support block 901 is located at the upper end of the front conveying frame 8, the second support block 902 is located at the lower end of the front conveying frame 8, and a first bolt 903 is installed between the first support block 901 and the second support block 902, that is, the first support block 901 and the second support block 902 are fixed by the first bolt 903. The upper end of the first support block 901 is fixedly connected with a support portion 904, and the first connecting rod 10 is rotatably connected between the two support portions 904. By loosening the first bolt 903, the first support frame 9 can be used to slide in the first slide groove 801, thereby changing the gap between the first rubber wheel 11 and the first driven wheel 12, so that the first conveying mechanism 7 can adapt to metal anchor rods of different specifications.

[0076] like Figure 6 to Figure 9 As shown, two second slide grooves 1401 are provided on the grinding table 14, and a second conveying mechanism 17 matching the second slide groove 1401 is slidably connected on the grinding table 14. The second conveying mechanism 17 includes a second support frame 18, and the second support frame 18 is slidably connected in the second slide groove 1401. The second support frame 18 is threadedly connected with a second bolt 19. When the second bolt 19 is tightened, the friction between the second support frame 18 and the inner wall of the second slide groove 1401 is increased, so that the second support frame 18 is fixed on the grinding table 14. A second connecting rod 20 is rotatably connected between the two second supporting frames 18, and a second rubber wheel 21 is fixedly connected to the second connecting rod 20. A second driven wheel 22 matching the second rubber wheel 21 is fixedly connected to the grinding table 14. A clutch 23 is fixedly connected between the second connecting rod 20 and the first connecting rod 10, and the clutch 23 can control whether the second connecting rod 20 and the first connecting rod 10 rotate synchronously.

[0077] Specifically, a driving mechanism (not shown in the figure) for driving the second connecting rod 20 to rotate is installed on the grinding table 14. The second connecting rod 20 rotates through the driving mechanism, and the second connecting rod 20 rotates with the first connecting rod 10 through the clutch 23. In the initial state, the second connecting rod 20 rotates, and the clutch 23 controls the first connecting rod 10 and the second connecting rod 20 to be disconnected, and the first connecting rod 10 does not rotate. After the metal anchor rod is placed, the clutch 23 is started to make the second connecting rod 20 rotate with the first connecting rod 10. That is, during the process of placing the metal anchor rod, the first connecting rod 10 does not rotate, which can ensure the safety of placing the metal anchor rod.

[0078] like Figure 6-7As shown, a pretreatment mechanism 24 is fixedly connected to the shell 15, and the pretreatment mechanism 24 can treat the surface of the metal anchor rod to make the surface of the metal anchor rod a clean surface, and avoid the problem of impurities mixing with the coating to affect the quality of the coating when the adaptive anti-corrosion coating is prepared later. The shell 15 is also provided with an observation port 1501, and a cover body 16 is rotatably connected to the shell 15. The cover body 16 is partially transparent and is connected to the shell 15 by a hinged manner, that is, the cover body 16 can be opened. After opening, it is convenient to explore the interior of the shell 15 from the observation port 1501, and the equipment in the shell 15 can be inspected and repaired in the shutdown state.

[0079] Specifically, Figure 6-7 As shown, the pretreatment mechanism 24 includes a plurality of support rods 25, and the plurality of support rods 25 are fixedly connected to the inner wall of the housing 15. A mounting plate 26 is slidably connected to the support rod 25, and a first motor 28 is mounted on the mounting plate 26. A cleaning brush 29 is rotatably connected to the output shaft of the first motor 28, and the cleaning brush 29 can specifically be a hair brush, a wire brush, etc. The cleaning brush 29, the second rubber wheel 21, and the second driven wheel 22 squeeze the metal anchor rod to form pressure on three surfaces. The second rubber wheel 21 and the cleaning brush 29 rotate at different speeds, and the friction of the metal anchor rod surface is achieved through the speed difference, thereby cleaning the metal anchor rod surface.

[0080] like Figure 6-7 As shown, a hydraulic cylinder 27 is installed between the mounting plate 26 and the housing 15. The hydraulic cylinder 27 can control the distance between the cleaning brush 29 and the metal anchor rod. The cleaning brush 29 can generate friction with the metal anchor rod through the hydraulic cylinder 27, which is beneficial to cleaning impurities on the surface of metal anchor rods with different outer diameters.

[0081] like Figures 4 to 14 As shown, the grinding assembly 30 includes an upper shell 31 and a lower shell 32, the upper shell 31 and the lower shell 32 form a grinding chamber, and a first through hole 40 is formed between the upper shell 31 and the lower shell 32. The metal anchor rod after passing through the pretreatment mechanism 24 enters the grinding chamber through the first through hole 40. A shot blaster 41 matching the grinding chamber is fixedly connected to the upper shell 31, and the shot blaster 41 is used to throw the projectiles into the grinding chamber at high speed, and the projectiles contact the surface of the metal anchor rod to achieve grinding of the surface of the metal anchor rod.

[0082] like Figure 12 to Figure 14As shown, the grinding assembly 30 also includes a shot box 42, a shot output pipe 43 is installed between the shot box 42 and the shot blaster 41, and a first material pump 44 is installed on the shot output pipe 43. The first material pump 44 cooperates with the shot output pipe 43 to deliver the shots in the shot box 42 to the shot blaster 41. The inner wall of the lower housing 32 is fixedly connected to a limit block 35, a filter plate 36 is placed on the limit block 35, and a fourth bolt 37 matching the limit block 35 is installed on the filter plate 36, and the limit block 35 and the filter plate 36 are detachably fixed by the fourth bolt 37. The filter plate 36 divides the grinding chamber into a first cavity 38 and a second cavity 39. A shot recovery pipe 45 matching the first cavity 38 is installed on the shot box 42. A second material pump 46 is fixedly connected to the shot recovery pipe 45. Through the cooperation of the second material pump 46 and the second material pump 46, the shots in the first cavity 38 can be collected into the shot box 42, and the shots are output to the shot blaster 41 through the first material pump 44 and the shot recovery pipe 45, thereby realizing the circulation of the shots.

[0083] Specifically, the filter plate 36 plays a filtering role. The mesh of the filter plate 36 is smaller than the outer diameter of the projectile. The polished residue will fall on the filter plate 36, and the projectile will also fall on the filter plate 36. The residue with a smaller aperture than the mesh of the filter plate 36 will enter the second cavity 39. The residue with a larger aperture than the mesh of the filter plate 36 will be collected by the shot box 42 and ejected from the shot blaster 41 at high speed. During this process, the projectile rubs against the residue, and the residue rubs against the metal anchor rod. The particle size of the residue will decrease until it meets the mesh aperture of the filter plate 36 and falls into the second cavity 39. That is, the metal anchor rod can be polished, and the surface of the metal anchor rod can be used to form a rough surface. The polished impurities can also be processed so that the impurities meet the corresponding regulations, which is convenient for the subsequent secondary use of the polished impurities.

[0084] like Fig.14 As shown, the upper shell 31 and the lower shell 32 are hinged, and a connecting ear 33 is provided at one end of the upper shell 31 and the lower shell 32 away from the hinged part, that is, the upper shell 31 and the lower shell 32 are fixedly connected with the connecting ear 33, and the third bolt 34 is installed on the connecting ear 33. The upper shell 31 and the lower shell 32 are locked by the cooperation of the third bolt 34 and the connecting ear 33. The upper shell 31 and the lower shell 32 are hingedly arranged, which is also convenient for replacing the filter plate 36 in the grinding chamber.

[0085] like Figures 4 to 10As shown, the grinding table 14 is provided with a third slide groove 1402, and a mounting table 47 matching the grinding assembly 30 is slidably connected in the third slide groove 1402. A fifth bolt 48 matching the mounting table 47 is installed on the grinding assembly 30, and the fifth bolt 48 realizes the locking and fixing of the mounting table 47 and the grinding assembly 30. A screw rod 49 matching the mounting table 47 is rotatably connected to the third slide groove 1402. When the screw rod 49 is rotated, the mounting table 47 can slide in the third slide groove 1402 to adjust the position of the grinding assembly 30 so that the first through hole 40 can correspond to the position of the metal anchor rod, that is, the metal anchor rod can enter the interior of the grinding assembly 30 through the first through hole 40. A handle 4901 is also fixedly connected to the screw rod 49, and the handle 4901 can facilitate the rotation of the screw rod 49.

[0086] Among them, a fourth slide groove 1403 is opened on 14, and the grinding component 30 can slide in the fourth slide groove 1403 to cooperate with the movement of the second conveying mechanism 17 and adapt to metal anchor rods with different outer diameters.

[0087] like Figure 12 to Figure 15 As shown, a material recovery mechanism 50 matching the second cavity 39 is installed on the lower shell 32, and the material recovery mechanism 50 can extract the residue in the second cavity 39. Specifically, the material recovery mechanism 50 includes a third material pump 51, and the inlet end of the third material pump 51 is fixedly connected to a material recovery pipe 52, and the material recovery pipe 52 is in communication with the second cavity 39. The output end of the third material pump 51 is fixedly connected to a first material output pipe 53, and a filter mechanism 56 is installed at one end of the first material output pipe 53 away from the third material pump 51, and the filter mechanism 56 can collect the residue. A hot air recovery pipe 54 matching the material recovery pipe 52 is installed on the shell 15, and a first filter 55 is fixedly connected to the hot air recovery pipe 54, and impurities and heat in the shell 15 are extracted by the hot air recovery pipe 54, and impurities in the shell 15 are filtered by the first filter 55. Similarly, the residue and heat in the grinding chamber are extracted by the material recovery pipe 52, and the heat and residue are transported to the filtering mechanism 56 through the third material pump 51. The filtering mechanism 56 can separate the hot air and the residue. The hot air can be used in the subsequent metal anchor drying process, and the residue can be used to prepare the second wear-resistant layer 4 in the adaptive anti-corrosion coating to reduce the cost of preparing the adaptive anti-corrosion coating.

[0088] like Figure 15 to Figure 17As shown, the paint spraying mechanism 61 includes a paint spraying box 62, and a plurality of paint spraying chambers 63 are arranged on the paint spraying box 62. In this embodiment, the number of the paint spraying chambers 63 is 4, and the 4 paint spraying chambers 63 are used to prepare the anti-corrosion layer 1, the first wear-resistant layer 2, the functional layer 3, and the second wear-resistant layer 4, respectively. The paint spraying box 62 is provided with a second through hole 71 matching the paint spraying chamber 63, and the paint spraying box 62 is fixedly connected with a plurality of nozzles 65 matching the paint spraying chamber 63, and the nozzles 65 are located above the second through hole 71. The metal anchor rod treated by the grinding assembly 30 passes through the paint spraying box 62 from the second through hole 71, and the nozzle 65 sprays the corresponding coating. Since the metal anchor rod is rotating and moving forward, the coating sprayed by the nozzle 65 can be evenly coated on the surface of the metal anchor rod. Since the paint spraying chamber 63 and the nozzle 65 are arranged in sequence, that is, the anti-corrosion layer 1, the first wear-resistant layer 2, the functional layer 3 and the second wear-resistant layer 4 can be coated on the surface of the metal anchor rod in sequence.

[0089] like Fig.15 As shown, the paint spraying mechanism 61 also includes a plurality of paint supply systems 66 matched with the nozzles 65, and a paint delivery pipe 67 is installed between the paint supply system 66 and the nozzles 65. The paint supply system 66 is used to receive the adaptive anti-corrosion coating raw materials and deliver the adaptive anti-corrosion coating raw materials to the nozzles 65, so that the nozzles 65 coat the adaptive anti-corrosion coating raw materials on the surface of the metal anchor rod.

[0090] A paint spray cover 64 matching with the plurality of paint spray chambers 63 is rotatably connected to the paint spray box 62 .

[0091] like Figure 15 to Figure 17 As shown, the filtering mechanism 56 includes a box body 57, on which a feed port 58, a first discharge port 59 and a second discharge port 60 are provided, and the feed port 58 is connected to the first material output pipe 53. The hot air and residue transported by the first material output pipe 53 enter the box body 57 through the feed port 58. A first hot air delivery pipe 70 is installed on the first discharge port 59, and a drying mechanism is installed at one end of the first hot air delivery pipe 70 away from the first discharge port 59, that is, hot air is delivered to the drying mechanism, and the coating on the metal anchor rod is dried by the drying mechanism. A second filter 80 matching the first discharge port 59 is installed on the inner wall of the box body 57, and the second filter 80 can filter out the residue to prevent the residue from being discharged from the first hot air delivery pipe 70.

[0092] like Figure 15 to Figure 17As shown, a second material output pipe 68 is installed on the second discharge port 60, and one end of the second material output pipe 68 away from the box 57 is connected to the coating supply system 66. The second material output pipe 68 conveys the residue to the coating supply system 66, and the residue is conveyed to the nozzle 65 for preparing the second wear-resistant layer 4. The second wear-resistant layer 4 is formed by mixing the residue and the wear-resistant medium, which can reduce the use of other wear-resistant media, is beneficial to energy conservation and environmental protection, and can also adapt to the preparation cost of the anti-corrosion coating. Moreover, during the use of the metal anchor rod, the outer wall of the metal anchor rod is in contact with the wall of the coal mine, and friction is generated with the wall, and the second wear-resistant layer 4 is consumed. When the metal anchor rod is drilled into the air, most of the second wear-resistant layer 4 is consumed, and the functional layer 3 is exposed to the air. In this way, it can avoid the premature rupture of the functional particles 6 due to the friction between the functional layer 3 and the wall, which affects the reaction effect of the functional layer 3 and the concrete. After adding concrete into the hole, the alkaline medium in the concrete reacts with the functional layer 3, the functional particles 6 in the functional layer 3 break, and the bacterial colony 604 reacts with the concrete, inducing calcium carbonate precipitation, filling the pores in the concrete, thereby reducing water retention and accelerating drying. In this way, the quality of the concrete can be improved, the service life of the metal anchor can be extended, and the corrosion of the metal anchor by the corrosive medium in the concrete can be reduced.

[0093] like Fig.17 As shown, in this embodiment, the drying mechanism includes a first drying cylinder 69, which is fixedly connected to the end of the paint spray box 62 away from the polishing table 14, and the first drying cylinder 69 is matched with the second through hole 71. The metal anchor rod passes through the second through hole 71 and enters the first drying cylinder 69. A heat collection cavity 6901 is provided on the first drying cylinder 69, and a hot air output hole 6902 matching the heat collection cavity 6901 is provided on the first drying cylinder 69. The hot air is discharged from the hot air output hole 6902, and the hot air directly contacts the metal anchor rod prepared with the adaptive anti-corrosion coating to achieve drying of the adaptive anti-corrosion coating.

[0094] like Figure 4-5 As shown, one end of the grinding mechanism 13 away from the first conveying mechanism 7 is fixedly connected to a receiving mechanism 72 that matches the drying mechanism. After the metal anchor rod comes out of the drying mechanism, the metal anchor rod is conveyed by the receiving mechanism 72.

[0095] like Figure 4-5 , Figure 18-19As shown, the receiving mechanism 72 includes a rear conveying frame 73, and the two ends of the rear conveying frame 73 are respectively fixedly connected with a slideway 74, and the slideway 74 is slidably connected with an electric slider 75, and the electric slider 75 is installed with a mechanical arm 76, and the mechanical arm 76 is installed with a memory metal arc plate 77. The memory metal arc plate 77 is provided with two third driven wheels 79 and a driving wheel 78, and the driving wheel 78 is located between the two third driven wheels 79. The driving wheel 78 and the third driven wheel 79 are both rubber wheels, and the driving wheel 78 is driven by the second motor.

[0096] like Fig.19 As shown, when clamping the metal anchor rod, the two memory metal arc plates 77 are close to the metal anchor rod, and the metal anchor rod is used to contact the driving wheel 78, and the third driven wheel 79 is respectively located at the upper and lower ends of the metal anchor rod to fix the metal anchor rod, and when the driving wheel 78 rotates, it rotates with the metal anchor rod. Generally, the driving wheel 78 will not start until one end of the metal anchor rod loses connection with the second rubber wheel 21, and the rotation relay is realized until one end of the metal anchor rod is completely separated from the drying mechanism.

[0097] like Figure 4-5 As shown, the number of electric sliders 75 is generally two groups, and the driving wheels 78 and the third driven wheels 79 on the two groups of electric sliders 75 are respectively fixed to the two ends of the metal anchor rod, and only one driving wheel 78 of the two groups of driving wheels 78 is driven by the second motor. A discharge port 7301 is provided on the rear conveying frame 73, and the two groups of electric sliders 75 convey the metal anchor rod to the discharge port 7301, and then release the metal anchor rod, and the metal anchor rod falls to the ground from the discharge port 7301. A collection box can be placed on the ground of the discharge port 7301 to realize the automatic collection of the metal anchor rod prepared with the adaptive anti-corrosion coating.

[0098] When the preparation device of the adaptive anti-corrosion coating of the metal anchor is used, first, the distance between the first rubber wheel 11 and the first driven wheel 12 needs to be adjusted according to the outer diameter of the metal anchor to ensure that the first rubber wheel 11 and the first driven wheel 12 can stably clamp the metal anchor. Then, the distance between the second rubber wheel 21 and the second driven wheel 22 is adjusted, which is similar to the distance between the first rubber wheel 11 and the first driven wheel 12. Then, the position of the grinding assembly 30 is adjusted so that the first through hole 40 and the advancing distance of the metal anchor are on the same straight line, and then the metal anchor is adjusted so that it can pass through the second through hole 71 and the first drying drum 69 during the advancing process.

[0099] Then, the metal anchor rod is placed between the first rubber wheel 11 and the first driven wheel 12 without the first rubber wheel 11 rotating, and the metal anchor rod is clamped by the first driven wheel 12 and the first rubber wheel 11. Then, the clutch 23 is started, and the second rubber wheel 21 drives the first connecting rod 10 to rotate. The metal anchor rod can rotate and move toward the direction close to the first drying drum 69 while rotating.

[0100] When the metal anchor rod moves forward, it will first contact the cleaning brush 29. The cleaning brush 29 is rotated by the first motor 28. The rotation frequencies of the cleaning brush 29 and the metal anchor rod are different. Friction is generated between the cleaning brush 29 and the metal anchor rod. The cleaning brush 29 can remove impurities on the surface of the metal anchor rod, such as rust spots and other impurities.

[0101] After the metal anchor rod passes through the cleaning brush 29, it will enter the grinding chamber, where the projectiles are circulated and sprayed. The projectiles contact the metal anchor rod, and the metal anchor rod is rotating and can contact multiple surfaces of the metal anchor rod, so that the surface of the metal anchor rod forms pits, which is conducive to the subsequent coating preparation. During the grinding process of the metal anchor rod, residues will fall off, and the residues will be sorted by the filter plate 36. The residues that meet the specifications will fall into the second cavity 39. The residues in the second cavity 39 will be transported to the subsequent paint supply system 66. The paint supply system 66 mixes the residues with the wear-resistant medium to prepare the second wear-resistant layer 4. The residues that do not meet the regulations are sucked into the shot box 42 through the shot recovery pipe 45 and the second material pump 46, and are output to the shot blaster 41 through the shot output pipe 43 and the first material pump 44, and the residues are ejected by the shot blaster 41 for a second time. During this process, the residue can also form smaller pits on the surface of the metal anchor rod, and the residue can also be crushed for the second time. The residue falls on the filter plate 36, and the projectiles also fall on the filter plate 36. The projectiles vibrate the filter plate 36, promoting the residue that meets the particle size specifications to pass through the filter plate 36 and enter the second cavity 39.

[0102] After the metal anchor rod passes through the grinding assembly 30, the metal anchor rod enters through the second through hole 71 and passes through multiple spray chambers 63 in sequence. The nozzle 65 in each spray chamber 63 sprays different media to form an anti-corrosion layer 1, a first wear-resistant layer 2, a functional layer 3, and a second wear-resistant layer 4 on the surface of the metal anchor rod, respectively, thereby completing the preparation of the metal anchor rod's adaptive anti-corrosion layer. The metal anchor rod then passes through the first drying drum 69, and the first drying drum 69 will spray out the hot air generated by the equipment in the shell 15 and the grinding assembly 30, that is, the heat of the equipment in the shell 15 and the heat generated by the grinding assembly 30 are recovered to dry the adaptive anti-corrosion layer of the metal anchor rod, which can save energy and reduce the production cost of the adaptive anti-corrosion layer of the metal anchor rod while being energy-saving and environmentally friendly.

[0103] After the metal anchor rod passes through the first drying drum 69, the metal anchor rod is clamped by the mechanical arm 76, the mechanical arm 76, the memory metal arc plate 77, the driving wheel 78, and the third driven wheel 79. In the clamped state, the metal anchor rod will still rotate. When the metal anchor rod is completely separated from the second rubber wheel 21 and the second driven wheel 22, the second motor on one of the driving wheels 78 will start, and the metal anchor rod will be carried at the same rotation speed and forward speed to realize the conveying relay of the metal anchor rod. The remaining metal anchor rods that have not passed through the grinding assembly 30 and the painting mechanism 61 are advanced. Multiple groups of mechanical arms 76, mechanical arms 76, memory metal arc plates 77, driving wheels 78, and third driven wheels 79 can stably clamp the metal anchor rod, and it is not easy to cause tilting and falling. After the adaptive corrosion-resistant layer of the metal anchor rod is prepared, the mechanical arm 76 conveys the metal anchor rod to the discharge port 7301, and loosens the metal anchor rod to make the metal anchor rod fall from the discharge port 7301.

[0104] The above-mentioned preparation equipment of the adaptive anti-corrosion coating of the metal anchor of the underground coal mine can prepare the adaptive anti-corrosion coating of the metal anchor on the metal anchor, and the metal anchor is pre-treated before preparation, so that the adaptive anti-corrosion coating of the metal anchor can be well attached to the metal anchor. In addition, the residue generated by the treatment of the metal anchor is used as the preparation material of the second wear-resistant layer 4, which can save costs. At the same time, the heat generated by the equipment for treating the metal anchor is used to dry the adaptive anti-corrosion coating of the metal anchor, which can also save preparation costs and save energy and protect the environment.

[0105] A method for preparing an adaptive anti-corrosion coating for an underground coal mine metal anchor in one embodiment of the present invention comprises the following steps:

[0106] S1. Preparation of functional particles 6:

[0107] S1.1. Mix the nutrient medium 603 including carbon source, nitrogen source, calcium source and trace elements with Bacillus pasteurianus to form an aqueous phase.

[0108] S1.2. Mix the water phase with an oil phase such as mineral oil to form a water-oil emulsion.

[0109] S1.3, adding sodium alginate solution to the water-oil emulsion, and cross-linking and curing with calcium chloride to form a shell 602.

[0110] S1.4. A sustained-release medium is coated on the outer surface of the shell 602 to form a sustained-release layer 601 .

[0111] S1.5. This step is optional. The specific operation is: adding a buffer into the shell 602 to maintain the stability of the pH value inside the functional particles 6 and ensure the living environment of the bacterial colony 604.

[0112] S2. Preparation of functional layer 3:

[0113] S2.1. Select one or more combinations of epoxy resin, polyurethane, and acrylic resin as polymer 5.

[0114] S2.2. Add a dispersant such as a silane coupling agent to the polymer 5 to improve the dispersibility of the functional particles 6 and prevent the functional particles 6 from aggregating.

[0115] S2.3, uniformly dispersing the functional particles 6 in the polymer 5 at a ratio of 5% to 20% to form a mixture of the functional layer 3.

[0116] S3. Preparation of anti-corrosion layer 1:

[0117] S3.1. Select epoxy resin, polyurethane, etc. as the anti-corrosion layer 1 of the metal anchor.

[0118] S3.2. Evenly coat the anti-corrosion material on the surface of the metal anchor rod to form an anti-corrosion layer 1.

[0119] S4, preparing the first wear-resistant layer 2:

[0120] S4.1. Select one or more combinations of metal, ceramic or polymer as the material of the first wear-resistant layer 2.

[0121] S4.2. The first wear-resistant layer 2 is evenly coated on the anti-corrosion layer 1 to protect the anti-corrosion layer 1 from being bumped during transportation and use.

[0122] S5 , coating the functional layer 3 : uniformly coating the mixture of the functional layer 3 on the first wear-resistant layer 2 .

[0123] S6, preparing the second wear-resistant layer 4:

[0124] S6.1. Select one or more combinations of metal, ceramic or polymer as the material of the second wear-resistant layer 4.

[0125] S6.2. The second wear-resistant layer 4 is evenly coated on the functional layer 3 to protect the functional layer 3 from being bumped during transportation and use.

[0126] S7, curing and post-processing:

[0127] S7.1. Place the coated metal anchor in a suitable environment for curing to ensure that each coating is tightly bonded.

[0128] S7.2. Perform quality inspection on the coating to ensure the uniformity and integrity of the anti-corrosion layer 1, the first wear-resistant layer 2, the functional layer 3 and the second wear-resistant layer 4.

[0129] Through the above steps, a metal anchor coating with adaptive anti-corrosion function is prepared, which can effectively extend the service life of the metal anchor and improve the durability and impermeability of concrete.

[0130] In another embodiment, different from the above embodiment, Fig. 20 As shown, a second drying cylinder 81 matching the second through hole 71 is installed between each spray chamber 63, the second drying cylinder 81 closest to one end of the grinding assembly 30 is connected to the first hot air delivery pipe 70, a second hot air delivery pipe 82 is installed between adjacent second drying cylinders 81, and a second hot air delivery pipe 82 is also installed between the second drying cylinder 81 farthest from one end of the grinding assembly 30 and the first drying cylinder 69. That is, the recovered hot air is sequentially delivered to multiple second drying cylinders 81, the second drying cylinder 81 exchanges heat with the hot air, and the heat on the second drying cylinder 81 is used to dry each coating. That is, drying is performed separately between the preparation of the anti-corrosion layer 1, the first wear-resistant layer 2, the functional layer 3 and the second wear-resistant layer 4, and then the preparation of the next coating is performed, and finally the first drying cylinder 69 sprays the hot air onto the surface of the metal anchor.

[0131] The heat of each second drying drum 81 is not too high, and it is not easy to cause the coating to crack due to high temperature, so that the coating can be better coated on the surface of the metal anchor.

[0132] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0133] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An adaptive anti-corrosion coating for metal anchor bolts in underground coal mines, characterized in that: It comprises an anti-corrosion layer, a first wear-resistant layer is formed on the anti-corrosion layer, a functional layer is formed on one end surface of the first wear-resistant layer away from the anti-corrosion layer, and a second wear-resistant layer is formed on one end surface of the functional layer away from the first wear-resistant layer; The second wear-resistant layer includes a polymer and functional particles, the functional particles are evenly distributed in the polymer, the functional particles include an outer shell, the outer wall of the outer shell is formed with a sustained-release layer, the outer shell is filled with a nutrient medium and a bacterial community, and the nutrient medium is used to provide nutrients to the bacterial community.

2. The adaptive anti-corrosion coating for metal bolts in underground coal mines according to claim 1, characterized in that: The bacterial community is Bacillus pasteurianus, and the nutrient medium is one or more combinations of carbon sources, nitrogen sources, calcium sources and trace elements.

3. A preparation device for an adaptive anti-corrosion coating for metal anchors in underground coal mines, used for preparing the adaptive anti-corrosion coating as claimed in any one of claims 1 to 2, characterized in that: include: A grinding mechanism, the grinding mechanism comprising a grinding table, a pretreatment mechanism and a grinding component are installed on the grinding table, and a shell matching the pretreatment mechanism and the grinding component is installed on the grinding table; A first conveying mechanism is installed at one end of the grinding table close to the pretreatment mechanism, and the first conveying mechanism conveys the metal anchor rod to one end of the pretreatment mechanism in a rotating forward manner. A receiving mechanism is installed at one end of the grinding table close to the grinding assembly; The grinding assembly includes an upper shell and a lower shell, the upper shell and the lower shell form a grinding chamber, the upper shell is fixedly connected to a shot blaster matching the first cavity, and the lower shell is fixedly connected to a material recovery mechanism matching the second cavity; A painting mechanism for preparing an adaptive anti-corrosion coating on the surface of the metal anchor rod is installed between the receiving mechanism and the grinding mechanism.

4. The preparation equipment of the adaptive anti-corrosion coating for metal anchor bolts in underground coal mines according to claim 3 is characterized in that: The first conveying mechanism includes a front conveying frame, a pair of first sliding grooves are opened on the front conveying frame, a first supporting frame matching the first sliding grooves is slidably connected to the front conveying frame, a first connecting rod is rotatably connected between the pair of first supporting frames, a first rubber wheel is fixedly connected to the first connecting rod, and a first driven wheel matching the first rubber wheel is fixedly connected to the front conveying frame.

5. The preparation equipment of the adaptive anti-corrosion coating for metal anchor bolts in underground coal mines according to claim 4, characterized in that: The polishing table is provided with a pair of second slide grooves matching the pretreatment mechanism, a second support frame is slidably connected in the second slide groove, a second bolt matching the bottom wall of the second slide groove is fixedly connected to the second support frame, a second connecting rod is rotatably connected between the pair of second support frames, a plurality of second rubber wheels are fixedly connected to the second connecting rod, and a second driven wheel matching the second rubber wheel is fixedly connected to the polishing table; A clutch is installed between the second connecting rod and the first connecting rod, and a driving mechanism for driving the second driven wheel to rotate is fixedly connected to the grinding table.

6. The preparation equipment of the adaptive anti-corrosion coating for metal anchor bolts in underground coal mines according to claim 3 is characterized in that: The pretreatment mechanism comprises a plurality of support rods, the support rods are fixedly connected to the housing, a mounting plate is slidably connected to the support rods, a first motor is mounted on the mounting plate, and a cleaning brush is fixedly connected to the output shaft of the first motor; A hydraulic cylinder is installed between the mounting plate and the inner wall of the shell.

7. The equipment for preparing the adaptive anti-corrosion coating for metal anchor bolts in underground coal mines according to claim 3 is characterized in that: The grinding assembly includes a shot box, a shot output pipe is fixedly connected between the shot box and the shot blaster, a first material pump is fixedly connected to the shot output pipe, a shot recovery pipe matching the first cavity is fixedly connected to the shot box, and a second material pump is installed on the shot recovery pipe.

8. The equipment for preparing the adaptive anti-corrosion coating for metal anchor bolts in underground coal mines according to claim 3 is characterized in that: The material recovery mechanism comprises a third material pump, an inlet end of the third material pump is fixedly connected to a material recovery pipe, an end of the material recovery pipe away from the third material pump is communicated with the second cavity, a hot gas recovery pipe is fixedly connected between the shell and the material recovery pipe, a first filter is installed on the hot gas recovery pipe, an output end of the third material pump is fixedly connected to a first material output pipe, and an end of the first material output pipe away from the third material pump is fixedly connected to a filter mechanism; The filtering mechanism comprises a box body, on which a feed port, a first discharge port and a second discharge port are arranged, the first material output pipe is connected to the feed port, and a second material output pipe is fixedly connected between the second discharge port and the paint spraying mechanism; One end of the paint spraying mechanism away from the polishing mechanism is fixedly connected to a first drying cylinder, and a first hot air conveying pipe is installed between the first discharge port and the first drying cylinder; The box body is provided with a second filter matching the first discharge port.

9. The equipment for preparing the adaptive anti-corrosion coating for metal anchor bolts in underground coal mines according to claim 3 is characterized in that: The paint spraying mechanism comprises a paint spraying box, a plurality of paint spraying chambers are arranged on the paint spraying box, a plurality of nozzles matching the paint spraying chambers are fixedly connected to the paint spraying box, and a second through hole matching the grinding mechanism is arranged on the paint spraying box; The paint spraying mechanism also includes a plurality of paint supply systems matched with the nozzles, and the paint supply systems provide paint matched with the adaptive anti-corrosion coating to the plurality of nozzles.

10. A method for preparing an adaptive anti-corrosion coating for metal anchors in underground coal mines, characterized in that: The following steps are involved: S1. Preparation of functional particles: S1.1, mixing the nutrient medium with the bacterial flora to form an aqueous phase; S1.2, mixing the water phase and the oil phase to form a water-oil emulsion; S1.3, adding sodium alginate solution to the water-oil emulsion, cross-linking and curing by calcium chloride to form a shell on the outer wall of the water-oil emulsion; S1.4, coating a sustained-release medium on the outer surface of the shell to form a sustained-release layer; S2. Preparation of functional layer: S2.1, select one or more combinations of epoxy resin, polyurethane, and acrylic resin as the polymer; S2.2, adding a dispersant to the polymer, and uniformly dispersing the functional particles in the polymer at a ratio of 5% to 20% to form a mixture of a functional layer; S3. Preparation of anti-corrosion layer: S3.

1. Select epoxy resin or polyurethane as the anti-corrosion layer of the metal anchor; S3.2, evenly coating the epoxy resin or polyurethane on the surface of the metal anchor to form an anti-corrosion layer; S4, preparing the first wear-resistant layer: S4.

1. Select one or more combinations of metal, ceramic or polymer as the material of the first wear-resistant layer; S4.2, uniformly coating a first wear-resistant layer on the anti-corrosion layer; S5, coating the functional layer: uniformly coating the mixture of the functional layer on the first wear-resistant layer; S6, preparing the second wear-resistant layer: S6.

1. Select one or more combinations of metal, ceramic or polymer as the material of the second wear-resistant layer; S6.2, uniformly coating a second wear-resistant layer on the functional layer; S7, curing and post-processing.

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