A coating device and coating method for special steel surface treatment

Abstract

The present invention discloses a coating device for surface treatment of special steel materials and a coating method thereof, and specifically relates to the field of coating processing technology. The device includes a processing chamber, a coating spray chamber, a conveying assembly, and a heating and curing chamber. The coating spray chamber is provided with an upper and lower spray assembly and a left and right spray assembly, and the upper and lower spray assembly and the left and right spray assembly are respectively used to spray protective materials on the upper and lower sides and the left and right sides of the steel materials; the processing chamber corresponds to the first conveying rack and the area of ​​the first conveying rack and is respectively provided with a first abutting assembly and a second abutting assembly. The present invention uses the pressure of the two groups of abutting racks on the steel materials, so that after the center of gravity of the steel materials leaves the first conveying rack, it can pass through the coating spray chamber smoothly without sagging or turning over. The distances of each surface of the steel materials relative to the upper and lower spraying assemblies and the left and right spraying assemblies are stable, the coating accuracy is higher, there is no need for subsequent flipping for secondary coating, and there is no need to reduce the conveying speed.

Description

Technical Field

[0001] The present invention relates to the technical field of coating processing, and more specifically, to a coating device and a coating method for surface treatment of special steel materials. Background Art

[0002] Bridge steel structure is one of the commonly used structural forms in modern bridge construction. It has the advantages of light weight, high strength, fast construction speed, and reusability. During the bridge construction process, it is necessary to select the structure and materials according to the relevant design of the bridge structure, and obtain the corresponding steel structure in advance. During the actual construction, the various components are connected by welding, riveting and bolting. In addition, since some structures of the bridge require extremely high safety requirements, the performance of the steel used is higher than that of ordinary steel, such as weathering steel, high-strength low-alloy steel, seamless steel pipes and other special steels for bridges, etc., to ensure that the steel structure has sufficient strength and service life.

[0003] Since bridges are designed to have a long service life, ordinary steel structures are exposed to the air all year round and are prone to oxidation. Therefore, bridge steel structures need to have good anti-oxidation functions, especially in areas near the ocean or in areas with severe industrial pollution. Even if special steel is used, it is necessary to coat (for example, spray) a layer or even multiple layers of protective material on the steel surface to form a coating layer to ensure effective protection of the steel.

[0004] Due to the poor environment at the bridge construction site, it is not easy to carry out full-range mechanized spray coating after the bridge structure is completed. Therefore, before the actual assembly of the steel, the corresponding steel structure needs to be prefabricated, that is, the steel is processed into the required shape at the processing site, the steel surface is polished and cleaned, and then the protective layer is sprayed and coated, and finally it is directly transported to the construction site for assembly.

[0005] Among them, the steel structure of the bridge is mainly composed of steel sections, that is, steel with a certain length. During actual processing, except for the assembly docking surface required for the subsequent assembly of the steel (this part needs to ensure the docking accuracy, so the surface needs to maintain the original surface structure), the remaining surfaces are coated. In order to facilitate the rapid and comprehensive spraying of the steel and to avoid multiple surface changes and spraying of the same coating layer, it is necessary to set up at least two groups of conveying structures to support and convey the steel in the prior art, and reserve a coating space between two adjacent groups of conveying structures, and set a coating device that can surround the steel in the coating space. Then, during the transportation of the steel, the full coating is directly carried out, thereby improving the coating efficiency.

[0006] Among them, due to design requirements, the coating layer required on the surface of some steel materials is thicker, that is, the coating amount of protective material is larger. After coating, the steel needs to have a suspended solidification space to ensure that the coating layer contacts the conveying structure behind it after solidification, thereby avoiding damage to the coating layer caused by the support of the conveying structure.

[0007] When the steel is transported from the first group of conveying structures to the second group of conveying structures, for steel with longer design requirements, when the front end of the steel leaves the first group of conveying structures and enters the coating space and passes through the suspended solidification space, the rear end part bears more steel on the first group of conveying structures and presses on the first group of conveying structures, thereby maintaining the front end of the steel in a stable suspended state in the coating space and the suspended solidification space. Until the front end of the steel reaches the second group of conveying structures, the center of gravity of the steel has not left the first group of conveying components. Therefore, the front end of the steel will not flip down and fall when passing through the coating space and the suspended solidification space. However, in bridge design, some special steels are also needed. Some special steels The steel structure is relatively short. When the short steel is transported into the coating space by the first set of conveying structures and passes through the suspended curing space, the center of gravity of the front end of the short steel has left the first set of conveying structures before reaching the second set of conveying structures. Therefore, the part of the rear of the steel that is supported by the first set of conveying structures is not sufficient to support the steel to maintain balance. As a result, the front end of the short steel is prone to downward deflection or even flipping and falling after leaving the conveying structure for a certain length, which causes the actual posture of the steel to be inconsistent with the coating design posture. The distribution of the coating material during actual coating is also different from the design requirements, which affects the coating quality. In addition, when passing through the coating space, steel that is too short is prone to falling downward, affecting the actual processing quality and processing safety. Summary of the invention

[0008] The present invention provides a coating device and a coating method for special steel surface treatment, and aims to solve the following problem: in the existing coating processing equipment, since some special steel structures are relatively short, the center of gravity of the front end of the short steel has left the first group of conveying structures before reaching the second group of conveying structures, which causes the front end of the short steel to easily deflect downward or even flip and fall after leaving the conveying structure for a certain length.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solutions: a coating device for surface treatment of special steel materials, comprising a treatment chamber, a coating spray chamber, a conveying assembly and a heating and curing chamber, the conveying assembly comprising a first conveying frame and a second conveying frame, the coating spray chamber is located in the area between the first conveying frame and the second conveying frame, and a suspended curing area is provided between the second conveying frame and the coating spray chamber;

[0010] The coating spraying room is provided with upper and lower spraying assemblies and left and right spraying assemblies for spraying protective materials on the upper and lower sides and the left and right sides of the steel respectively. The upper and lower spraying assemblies and the left and right spraying assemblies are both composed of a spraying movable seat and a spray head assembly, and the spray head assembly is installed on the spraying movable seat;

[0011] The first abutment assembly and the second abutment assembly are respectively arranged in the areas corresponding to the first conveyor rack and the second conveyor rack in the processing chamber. The first abutment assembly and the second abutment assembly are both composed of an abutment rack and a horizontal and vertical moving driver. Pressure racks are installed at the adjacent ends of the two groups of abutment racks, and a docking rack for abutting against the end of the steel is installed on the pressure rack.

[0012] In a preferred embodiment, the horizontal and vertical movement driver includes a translation guide and a lifting guide. The lifting guide is fixedly installed in the processing chamber, the translation guide is vertically slidably installed on the lifting guide, the abutment frame is laterally slidably installed on the translation guide, and the abutment frame slides on the translation guide along the conveying direction of the first conveying frame and the second conveying frame. A lifting driver for driving the translation guide and the abutment frame to lift and lower is provided in the processing chamber, and a translation driver for driving the abutment frame to move laterally is provided on the translation guide.

[0013] In a preferred embodiment, the upper and lower spraying assemblies also include a transverse guide rail, which is fixedly installed in the coating spraying chamber, and the spraying movable seats of the upper and lower spraying assemblies are laterally slidably installed on the transverse guide rail, and the transverse guide rail is provided with a driving device for driving the spraying movable seats of the upper and lower spraying assemblies to move laterally. The left and right spraying assemblies also include a vertical guide rail, which is fixedly installed in the coating spraying chamber, and the spraying movable seats of the left and right spraying assemblies are vertically slidably installed on the vertical guide rail, and the vertical guide rail is provided with a driving device for driving the spraying movable seats of the left and right spraying assemblies to move vertically. The nozzle assemblies on the spraying movable seats are arranged in at least two groups, and the two groups of nozzle assemblies are distributed in an "outward eight" shape in a plane perpendicular to the length of the steel.

[0014] In a preferred embodiment, the heating and curing chamber is arranged at the output end of the processing chamber, and the conveying assembly includes a third conveying frame located inside the heating and curing chamber. A heating assembly is arranged in the heating and curing chamber, and the heating assembly is used to heat the internal space of the heating and curing chamber. The third conveying frame is a belt conveying assembly, and the belt conveying assembly is distributed in a wave shape under the support of a belt roller.

[0015] In a preferred embodiment, the pressure frame is connected to the abutment frame through a pressure assembly, the pressure assembly is a hydraulic cylinder structure, the pressure assembly is fixedly mounted on the abutment frame, the pressure frame is fixedly mounted on the output end of the pressure assembly, and the docking frame and the abutment frame are detachably connected.

[0016] In a preferred embodiment, a strong magnetic electromagnet is embedded and installed on the docking frame, and a flexible pad and an extrusion nail are also provided at the position of the docking frame corresponding to the end face of the steel. The end of the extrusion nail corresponding to the steel is a sharp end, and the hardness of the extrusion nail is higher than the hardness of the steel. The extrusion nail is fixedly installed on the docking frame.

[0017] In a preferred embodiment, a pressure-blocking assembly is provided on the first abutting assembly and the second abutting assembly, the pressure-blocking assembly of the first abutting assembly includes a flat-pressure pressure-blocking plate, the pressure-blocking assembly of the second abutting assembly includes a pressure-blocking sheet structure, the pressure-blocking assembly also includes an ejection driver, the ejection driver is fixedly mounted on the pressure frame, the flat-pressure pressure-blocking plate and the pressure-blocking sheet structure are respectively mounted on the output ends of the corresponding ejection drivers, the flat-pressure pressure-blocking plate is slidably mounted on the docking frame of the first abutting assembly, the pressure-blocking sheet structure is composed of multiple groups of vertical thin plates, and the pressure-blocking sheet structure is slidably mounted on the docking frame of the second abutting assembly.

[0018] In a preferred embodiment, a liquid outlet is provided at the bottom of the pressure baffle plate structure corresponding to one end of the steel material, a protective material flow channel is provided inside the pressure baffle plate structure, a connecting pipe is provided on the pressure baffle plate structure, the protective material flow channel is used to connect the liquid outlet and the connecting pipe, the connecting pipe on the pressure baffle plate structure connects the protective material storage devices of the upper and lower spray assemblies and the left and right spray assemblies, and a pump structure is provided.

[0019] In a preferred embodiment, a precuring chamber is provided at the outlet of the coating spraying chamber, and horizontal air exhausts are installed on the upper and lower sides of the precuring chamber, and vertical air exhausts are installed on the left and right sides of the precuring chamber. The vertical air exhaust is a hollow structure, and the horizontal air exhaust and the vertical air exhaust are connected to an air supply source through an air pipe. The air supply source includes an air pump and an air heating device. The horizontal air exhaust and the vertical air exhaust are provided with air outlets on one side of the steel corresponding to the steel, wherein the air outlets on the horizontal air exhaust and the vertical air exhaust have an inclination toward the outside of the precuring chamber, and at the same time, the air outlets on the vertical air exhaust also have an upward inclination.

[0020] A coating method for surface treatment of special steel materials comprises the following steps:

[0021] Step 1: transport the steel material to the coating spraying room through the first conveyor rack;

[0022] Step 2: Turn on the spray head assembly and drive the spray moving seat to reciprocate to spray the protective material on the surface of the steel;

[0023] Step 3: before the center of gravity of the steel leaves the first conveying frame, drive the abutment frame of the second abutment assembly to move so that the docking frame of the second abutment assembly docks with the front end of the steel, and then drive the abutment frame of the first abutment assembly to move so that the docking frame of the first abutment assembly docks with the rear end of the steel;

[0024] Step 4: driving the abutment frames of the first abutment assembly and the second abutment assembly to move synchronously with the steel material, so that the coating layer on the surface of the steel material gradually passes through the suspended solidification zone;

[0025] Step 5: When the center of gravity of the steel reaches the second conveyor rack, the abutment racks of the first abutment assembly and the second abutment assembly are driven to reset, and the steel is waited for to be completely output by the second conveyor rack;

[0026] Step 6: The steel is conveyed to the heating and curing chamber by the second conveying rack, and is further conveyed by the third conveying rack, so that the coating layer of the steel is completely cured in the heating and curing chamber.

[0027] The beneficial effects of the present invention are as follows: with the help of the pressure exerted by the two sets of abutment frames on the steel, after the center of gravity of the steel leaves the first conveyor frame, it can pass through the coating spraying room smoothly without sagging or turning over, and the distances between each surface of the steel and the upper and lower spraying components and the left and right spraying components are stable. Under the condition that the initial parameters of the spraying operation are stable, the amount of protective material borne by each surface of the steel is relatively stable, so the coating accuracy is higher, and with the support and assistance of the first abutment component and the second abutment component, the steel can pass through the coating spraying room for one coating without the need for subsequent turning over for a second coating. The steel also has sufficient space and time to ensure the pre-curing of the coating layer on the surface of the steel, and there is no need to reduce the conveying speed, nor will the protective layer be sprayed due to the conveying speed being too slow, thereby ensuring the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the conveying direction of steel during processing according to the present invention.

[0030] Figure 3 Schematic diagram of the internal structure of the processing chamber of the present invention.

[0031] Figure 4 It is a top view of the steel material of the present invention when both ends thereof are in contact with the first abutting assembly and the second abutting assembly respectively.

[0032] Figure 5 It is a schematic diagram of the internal structure of the coating spray chamber of the present invention.

[0033] Figure 6 This is a distribution state diagram of the upper and lower spraying components and the left and right spraying components in the coating spraying room of the present invention.

[0034] Figure 7 The invention provides a first abutment component and a second abutment component adapted to steel materials with a slope structure at the end.

[0035] Figure 8It is a schematic diagram of the state in which the first abutting assembly and the second abutting assembly of the present invention abut against the steel material and cooperate to transport it to the second conveying rack.

[0036] Fig. 9 For the present invention Figure 7 A-section structure enlarged view.

[0037] Fig.10 For the present invention Figure 8 Enlarged view of the structure of part B.

[0038] Fig.11 It is a top view of the pressure retaining plate structure group of the present invention.

[0039] Fig.12 This is a diagram of the state of steel after being coated with protective material and passing through the pre-curing chamber.

[0040] Fig.13 It is a schematic diagram of the internal structure of the pre-curing chamber of the present invention.

[0041] Fig.14 The coating method of the present invention is a flow chart.

[0042] The figures are marked as follows: 1. treatment chamber; 101. first abutting assembly; 102. second abutting assembly; 11. abutting frame; 111. pressure assembly; 12. pressure frame; 13. docking frame; 131. strong magnetic electromagnet; 132. flexible pad; 133. extrusion pin; 14. translation guide; 141. translation driver; 15. lifting guide; 151. lifting driver; 2. coating spray chamber; 201. upper and lower spraying assembly; 202. left and right spraying assembly; 21. spraying shift Moving seat; 22, nozzle assembly; 23, horizontal guide rail; 24, vertical guide rail; 3, conveying assembly; 31, first conveying rack; 32, second conveying rack; 33, third conveying rack; 4, heating and curing chamber; 41, heating assembly; 5, steel; 6, pre-curing chamber; 61, horizontal air exhaust; 62, vertical air exhaust; 63, air outlet; 7, pressure blocking assembly; 71, flat pressure blocking plate; 72, pressure blocking plate structure; 721, liquid outlet; 722, protective material flow channel; 73, ejector drive. DETAILED DESCRIPTION

[0043] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0044] Refer to the instruction manual Figures 1 to 13A coating device for surface treatment of special steel materials comprises a treatment chamber 1, a coating spraying chamber 2, a conveying assembly 3 and a heating and curing chamber 4, wherein the coating spraying chamber 2 is arranged in the treatment chamber 1, the heating and curing chamber 4 is arranged at the output end of the treatment chamber 1, the conveying assembly 3 comprises a first conveying rack 31, a second conveying rack 32 and a third conveying rack 33, the first conveying rack 31 and the second conveying rack 32 are located inside the treatment chamber 1, and the coating spraying chamber 2 is located in the area between the first conveying rack 31 and the second conveying rack 32, and a suspended curing area is arranged between the second conveying rack 32 and the coating spraying chamber 2, so that the steel material 5 coated with the protective material has a certain amount of time to cure the coating layer on its surface when passing through.

[0045] The coating spraying room 2 is provided with an upper and lower spraying assembly 201 and a left and right spraying assembly 202, which are respectively used to spray protective materials (such as protective paint) on the upper and lower sides and the left and right sides of the steel 5, and the coating spraying room 2 is respectively provided with an inlet and outlet for the steel 5 to pass through. The first conveying frame 31 conveys the steel 5 into the coating spraying room 2. The steel 5 is sprayed when passing through the coating spraying room 2, and then moves to the second conveying frame 32 through the suspended curing area, and then is conveyed to the heating curing chamber 4 by the second conveying frame 32.

[0046] The first abutment assembly 101 and the second abutment assembly 102 are respectively provided in the abutment frame 11 corresponding to the first conveyor frame 31 and the first conveyor frame 31. The first abutment assembly 101 and the second abutment assembly 102 are both composed of the abutment frame 11, the translation guide 14 and the lifting guide 15. The lifting guide 15 is fixedly installed in the processing chamber 1, the translation guide 14 is vertically slidably installed on the lifting guide 15, the abutment frame 11 is horizontally slidably installed on the translation guide 14, and the abutment frame 11 is on the translation guide 14. Sliding along the conveying direction of the first conveying frame 31 and the second conveying frame 32, a lifting driver 151 (such as a hoisting mechanism or a hydraulic cylinder mechanism, etc.) is provided in the processing chamber 1 for driving the translation guide 14 and the abutment frame 11 to move up and down, and a translation driver 141 (such as a hydraulic cylinder, a screw motor and other structures) is provided on the translation guide 14 for driving the abutment frame 11 to move horizontally. Pressure frames 12 are installed at the adjacent ends of the two groups of abutment frames 11, and a docking frame 13 for abutting against the end of the steel 5 is installed on the pressure frame 12.

[0047] In actual use, for steel materials 5 with a longer length, that is, the actual length of the steel materials 5 is greater than three times the distance between the first conveyor frame 31 and the second conveyor frame 32, such steel materials 5 can maintain stable passage no matter how they pass through the space between the first conveyor frame 31 and the second conveyor frame 32, and will not bend or flip. Therefore, there is no need to use the first abutment assembly 101 and the second abutment assembly 102. However, for steel materials 5 with a length less than three times the distance between the first conveyor frame 31 and the second conveyor frame 32, after the front end of the steel materials 5 leaves the first conveyor frame 31 and the center of gravity moves out of the first conveyor frame 31, the front end of the steel materials 5 does not move to the second conveyor frame 32. Due to the lack of support, the steel materials 5 are prone to bend or flip due to gravity. At this time, the first abutment assembly 101 and the second abutment assembly 102 are needed. Specifically, in the case of steel materials 5, After the front end of the steel material 5 moves out of the first conveyor frame 31, its center of gravity moves out of the first conveyor frame 31, driving the abutting frame 11 of the second abutting assembly 102 to move toward the front end of the steel material 5, so that the docking frame 13 of the second abutting assembly 102 abuts against the front end of the steel material 5, and then driving the abutting frame 11 of the first abutting assembly 101 to approach the rear end of the steel material 5, so that the docking frame 13 of the first abutting assembly 101 abuts against the rear end of the steel material 5. At this time, under the drive of the two groups of translation drivers 141, the two groups of abutting frames 11 have pressure on the steel material 5, thereby causing the docking frame 13 to squeeze the end of the steel material 5, so that the docking frame 13 of the second abutting assembly 102 forms an upward friction on the front end of the steel material 5, so that after the center of gravity of the steel material 5 leaves the first conveyor frame 31, it can pass through the coating spraying chamber 2 smoothly without bending or turning over. For details, please refer to the attached manual Figure 3 and Figure 4, thereby ensuring that the steel material 5 can be stably sprayed and coated while ensuring that the movement posture of the steel material 5 during the coating operation is fixed, and the distances between each surface of the steel material 5 and the upper and lower spraying components 201 and the left and right spraying components 202 are stable. Based on the stability of the initial parameters of the spraying operation, the amount of protective material borne by each surface of the steel material 5 is relatively stable, so the coating accuracy is higher, and with the support and assistance of the first abutment component 101 and the second abutment component 102, the steel material 5 can be coated once through the coating spray chamber 2 without the need for subsequent flipping for secondary coating. The steel material 5 also has enough space and time to ensure the pre-curing of the coating layer on the surface of the steel material 5, and there is no need to reduce the conveying speed. The protective layer will not be sprayed due to slow conveying speed, and the coating quality is guaranteed. After the steel 5 passes through the coating spraying room 2 for coating, it continues to pass through the suspended solidification area. In this area, the coating layer on the surface of the steel 5 begins to solidify until the steel 5 reaches the second conveyor rack 32, which will not affect the coating layer. When the center of gravity of the steel 5 reaches the second conveyor rack 32, the steel 5 has the ability to be stably placed on the second conveyor rack 32. At this time, the first abutment assembly 101 and the second abutment assembly 102 can be driven to leave the steel 5 and reset to facilitate the coating process of the next group of steels 5, and the steel 5 is conveyed from the second conveyor rack 32 to the heating and curing chamber 4.

[0048] The third conveyor frame 33 is located inside the heating and curing chamber 4. A heating component 41 is provided inside the heating and curing chamber 4. The heating component 41 is used to heat the internal space of the heating and curing chamber 4, so that the coating layer on the surface of the steel material 5 coated with the protective material can be fully and completely cured when passing through the heating and curing chamber 4. The third conveyor frame 33 uses a belt conveyor component, and the belt conveyor component is distributed in a wave shape under the support of the belt roller. For details, please refer to the attached manual. Figure 2 , thereby ensuring that the coating layer on the outer surface of the steel material 5 can be fully cured.

[0049] It should be noted that the two ends of the steel 5 need to be docked with the corresponding structure during the subsequent bridge construction process. Therefore, the two ends of the steel 5 need to retain the original end faces. Therefore, the shape of the docking frame 13 provided in this embodiment is mutually compatible with the end faces of the steel 5, which can cover the end faces of the steel 5 and reduce the coverage of protective materials, thereby improving the quality of the end faces of the steel 5. Among them, since some steels 5 with a length value less than the distance value between the first conveyor frame 31 and the second conveyor frame 32 are small structures, they will be in a completely suspended state when passing through the area between the first conveyor frame 31 and the second conveyor frame 32, and due to their small size and small overall demand, they are not suitable for using automated spraying equipment and are more suitable for manual spraying operations.

[0050] In the above embodiment, in order to make the equipment adaptable to more steel materials 5 and to make the docking frame 13 have sufficient pressure to assist in supporting the steel materials 5, refer to the attached manual. Figure 3 The pressure frame 12 is connected to the abutting frame 11 through a pressure component 111. The pressure component 111 is a hydraulic cylinder structure. The pressure component 111 is fixedly mounted on the abutting frame 11. The pressure frame 12 is fixedly mounted on the output end of the pressure component 111. The docking frame 13 is detachably connected to the abutting frame 11 (for example, bolted). By using the pressure component 111 to drive the abutting frame 11, when the docking frame 13 docks the steel 5, more powerful pressure can be provided to ensure auxiliary support for the end of the steel 5. At the same time, with the help of the telescopic stroke of the pressure component 111, the moving stroke of the abutting frame 11 can also be increased, and the auxiliary following distance of the first abutting component 101 or the second abutting component 102 can be increased, so that the spraying operation of the steel 5 is more stable.

[0051] Further, in the above-mentioned embodiments, refer to the attached Figure 6 and Figure 7 In order to spray the steel material 5 comprehensively and evenly at one time, the present embodiment also provides the following technical solutions. The upper and lower spraying components 201 and the left and right spraying components 202 are both composed of a spraying movable seat 21 and a spray head assembly 22. The spray head assembly 22 is installed on the spraying movable seat 21. The upper and lower spraying components 201 also include a transverse guide rail 23, and the transverse guide rail 23 is fixedly installed in the coating spraying room 2. The spraying movable seat 21 of the upper and lower spraying components 201 is laterally slidably installed on the transverse guide rail 23. The transverse guide rail 23 is provided with a driving device for driving the spraying movable seat 21 of the upper and lower spraying components 201 to move laterally, such as a linear motor. The left and right spraying components 202 also include a vertical guide rail 24, which is fixedly installed in the coating spraying room 2. The spray movable seat 21 is vertically slidably installed on the vertical guide rail 24, and a driving device, such as a linear motor, is provided on the vertical guide rail 24 for driving the spray movable seat 21 of the left and right spray assemblies 202 to move vertically. During actual spraying, with the auxiliary support of the first abutment assembly 101 and the second abutment assembly 102, the front end of the steel 5 passes smoothly through the area of ​​the coating spray chamber 2. At this time, the protective material is sprayed outward by the nozzle assembly 22 to form a spray, and each group of driving equipment drives the spray movable seat 21 of the upper and lower spray assemblies 201 to move back and forth and drives the nozzle assembly 22 of the left and right spray assemblies 202 to move back and forth, so that the mist protective material sprayed by the nozzle assembly 22 can be evenly distributed in the coating spray chamber 2 and evenly coated on the surface of the steel 5 to ensure the coating quality.

[0052] For further information, please refer to the attached manual. Figure 6The nozzle assembly 22 on the spray moving seat 21 is arranged in at least two groups, and the two groups of nozzle assemblies 22 are distributed in an "outward eight" shape in a plane perpendicular to the length of the steel 5, that is, the two groups of nozzle assemblies 22 are arranged tilted respectively. For example, the nozzle assemblies 22 of the upper and lower spraying assemblies 201 are arranged tilted left and right respectively, and the nozzle assemblies 22 of the left and right spraying assemblies 202 are arranged tilted up and down respectively. Therefore, when facing the steel 5 with a more complex surface structure, such as I-beams, channel steels, etc., sprays in various directions can be formed. With the reciprocating motion of the spray moving seat 21, various surfaces of the steel 5 can be fully sprayed, thereby improving the spraying efficiency and ensuring the spraying quality.

[0053] In the above embodiment, due to the structural limitation of some steel materials 5, the ends thereof need to be set in a special shape, such as a step shape or a slope shape. In particular, due to the step shape and other structures, when designing the matching docking frame 13, an effective engagement can be formed, thereby helping to improve the abutment of the docking frame 13 to the steel material 5. As for the slope structure, it is itself in the shape of an inclined surface, and the corresponding docking frame 13 is also an inclined surface structure. Therefore, in the process of the first abutting component 101 and the second abutting component 102 applying pressure to the steel material 5, the ends of the steel material 5 have a component force in other directions, which is easy to cause the steel material 5 to move. Therefore, for the steel material 5 with a sloped structure at the end, when it is sprayed, the sloped structure at the front end is preferably facing downward, that is, when the front end of the steel material 5 is separated from the first conveying frame 31 and the docking frame 13 of the second abutting assembly 102 docks with its front end, with the help of the sloped structure, the docking frame 13 of the second abutting assembly 102 can directly provide an upward supporting force to the front end of the steel material 5. Therefore, the first abutting assembly 101 and the second abutting assembly 102 do not need to provide a large pressure on the docking frame 13, thereby making the steel material 5 more stable.

[0054] Among them, for the rear end of the steel 5, due to design requirements, its slope state is also different. When the slope structure of the rear end of the steel 5 is also facing downward, the docking frame 13 of the first abutment assembly 101 can also provide good vertical support for the steel 5, so that the rear end of the steel 5 will not swing downward during the process of detaching the first conveying frame 31 and moving toward the second conveying frame 32. However, when the slope structure of the rear end of the steel 5 is upward, refer to the attached manual Figure 8 When the rear end of the steel 5 is separated from the steel 5, the docking frame 13 of the first abutting assembly 101 cannot directly provide an upward supporting force to the rear end of the steel 5. In order to make the spraying process of the steel 5 more stable, the present embodiment also provides the following technical solutions. Specifically, a strong magnetic electromagnet 131 is embedded and installed on the docking frame 13. After the docking frame 13 docks with the end face of the steel 5, the strong magnetic electromagnet 131 can be energized to enable it to have the ability to magnetically adsorb the end face of the steel 5, thereby ensuring that the spraying process of the steel 5 is more stable.

[0055] For further information, please refer to the attached manual. Fig. 9 and Fig.10 A flexible pad 132 and an extrusion nail 133 are also provided at the position of the docking frame 13 corresponding to the end face of the steel 5. The end of the extrusion nail 133 corresponding to the steel 5 is a sharp end, and the hardness of the extrusion nail 133 is higher than the hardness of the steel 5. The extrusion nail 133 is fixedly installed on the docking frame 13. In actual use, the processing is magnetically adsorbed with the help of a strong magnetic electromagnet 131. The pressure component 111 can also be used to apply pressure to the docking frame 13 to compress the flexible pad 132, thereby increasing the friction between the end face of the steel 5 and the extrusion nail 133. At the same time, the extrusion nail 133 can also be pressed into the end surface of the steel 5, further increasing the support of the docking frame 13 for the steel 5 in the vertical direction, ensuring the stability of the posture of the steel 5 during spraying, and further improving the spraying quality of the steel 5 spraying operation.

[0056] For the heavy steel material 5, when its center of gravity leaves the first conveying frame 31 and before reaching the second conveying frame 32, when its front end or rear end is suspended in the air, due to the large gravity, the torque generated is large, and the reaction force on the docking frame 13 is also large. Figure 7 The reaction force of the rear end of the steel material 5 on the docking frame 13 of the first abutting assembly 101 and the attached Figure 8The reaction force of the front end of the steel material 5 on the docking frame 13 of the second abutting assembly 102, therefore, in order to improve the safety of the equipment and the stability of the steel material 5 during the spraying operation, the present embodiment also provides the following technical solutions, the first abutting assembly 101 and the second abutting assembly 102 are provided with a blocking pressure assembly 7, the blocking pressure assembly 7 of the first abutting assembly 101 includes a flat pressure blocking pressure plate 71, the blocking pressure assembly 7 of the second abutting assembly 102 includes a blocking pressure sheet structure 72, the blocking pressure assembly 7 also includes an ejection driver 73, the ejection driver 73 is fixedly installed on the pressure frame 12, the flat pressure blocking pressure plate 71 and the blocking pressure sheet structure 72 are respectively installed on the corresponding ejection driver The output end of the actuator 73, wherein, since the rear end of the steel material 5 is in an unsprayed state, there is no need to worry about obstruction. Therefore, the flat pressure baffle plate 71 can use a solid plate structure with higher strength. The flat pressure baffle plate 71 is slidably mounted on the docking frame 13 of the first abutment assembly 101. When the docking frame 13 of the first abutment assembly 101 contacts the rear end of the steel material 5, the ejection driver 73 controls the flat pressure baffle plate 71 to extend to the top of the rear end of the steel material 5, and cooperates with the first conveying frame 31 to form up and down pressing, providing strong support for the rear end of the steel material 5. When the front end of the steel material 5 moves out of the first conveying frame 31, it can provide effective rear end reverse support, reducing The pressure of the front end of the steel material 5 on the docking frame 13 of the second abutting assembly 102 is reduced, thereby reducing the slip of the slope structure caused by the large force, and improving the positioning accuracy of the steel material 5 during the spraying operation. Since the front end of the steel material 5 is in a sprayed state, it is not suitable for large obstructions. Therefore, a pressure-blocking sheet structure 72 is provided on the docking frame 13 of the second abutting assembly 102. Specifically, the pressure-blocking sheet structure 72 is composed of multiple groups of vertical thin plates. In actual use, after the front end of the steel material 5 enters the second conveying frame 32 (at this time, the rear end of the steel material 5 has not yet separated from the first conveying frame 31), the coating layer has passed through the suspended solidification zone, and the front of the steel material 5 is The coating layer at the end has been solidified, so the coating layer will not be affected after reaching the second conveyor frame 32. Therefore, before the rear end of the steel 5 separates from the first conveyor frame 31, the pressure-blocking plate structure 72 is controlled to extend toward the upper surface of the front end of the steel 5. When the rear end of the steel 5 separates from the first conveyor frame 31, and the slope of the rear end of the steel 5 faces upward, the docking frame 13 of the first abutment assembly 101 cannot provide complete vertical support for the rear end of the steel 5. With the help of the reverse pressing of the pressure-blocking plate structure 72 on the front end of the steel 5, the rear end of the steel 5 can be prevented from flipping downward, thereby further improving the stability and accuracy of the steel 5 during the spraying operation.

[0057] In addition, for steel materials 5 with thin surface coating, the reverse pressing of the vertical air discharge 62 may still cause damage to the coating. Fig.10, a liquid outlet 721 is provided at the bottom of the retaining and pressure plate structure 72 corresponding to one end of the steel material 5, a protective material flow channel 722 is provided inside the retaining and pressure plate structure 72, and a connecting pipe is provided on the retaining and pressure plate structure 72, the protective material flow channel 722 is used to connect the liquid outlet 721 and the connecting pipe, the connecting pipe on the retaining and pressure plate structure 72 connects the protective material storage devices of the upper and lower spraying components 201 and the left and right spraying components 202, and is provided with a pump structure, when the spraying of the steel material 5 is completed and the second abutting component 102 needs to be separated from the steel material 5, the ejection driver 73 controls the retaining and pressure plate structure 72 to leave the steel material 5, and at the same time of leaving the steel material 5, the liquid outlet 721 outputs the protective material to the outside, and the extrusion area of ​​the retaining and pressure plate structure 72 is supplemented with coating to ensure that the coating layer on the surface of the steel material 5 is complete, because there is no contact object in the top area during the subsequent processing of the steel material 5, so after entering the heating and curing chamber 4, the protective material supplemented with the liquid outlet 721 will not be separated, and will be cured accordingly, thereby ensuring the coating integrity of the steel material 5.

[0058] It should be noted that since the adopted pressure-blocking plate structure 72 is a vertically distributed thin plate structure, the vertical force-bearing strength of the structure is relatively high. Therefore, the pressure-blocking plate structure 72 only needs to extend a small distance above the steel 5 to provide strong support. Therefore, the pressure-blocking plate structure 72 has little effect on the coating layer on the surface of the steel 5, and after supplementary coating, it will not affect the overall coating quality of the steel 5, and can ensure the protection requirements of the steel 5.

[0059] In the above embodiment, since the protective material just after spraying is still liquid, it has a certain fluidity before it solidifies. When the coating layer on the surface of the steel material 5 is thicker, or the height of the steel material 5 is higher, the protective material on the left and right sides of the steel material 5 tends to flow downward due to gravity. Therefore, in order to reduce the downward flow of the coating layer on the surface of the steel material 5 and further increase the solidification speed of the coating layer on the surface of the steel material 5, so as to reduce the influence of the pressure on the coating layer when the steel material 5 enters the second conveyor frame 32 and cooperates with the pressure-blocking plate structure 72, refer to the attached manual. Figure 3 , Fig.12 and Fig.13, this embodiment also provides the following technical solutions, specifically, a pre-curing chamber 6 is provided at the outlet of the coating spraying chamber 2, and the steel 5 passes through the pre-curing chamber 6 after being sprayed by the upper and lower spraying components 201 and the left and right spraying components 202 in the coating spraying chamber 2, and the upper and lower sides of the pre-curing chamber 6 are both installed with horizontal air exhausts 61, and the left and right sides of the pre-curing chamber 6 are both installed with vertical air exhausts 62, and the vertical air exhausts 62 are hollow structures, and the horizontal air exhausts 61 and the vertical air exhausts 62 are both connected to an air supply source through an air pipe, and the air supply source includes an air pump and an air heating device, and then hot air is provided to the horizontal air exhausts 61 and the vertical air exhausts 62, and the horizontal air exhausts 61 and the vertical air exhausts 62 are both provided with air outlets 63 on one side of the steel 5, wherein the air outlets 63 on the horizontal air exhausts 61 and the vertical air exhausts 62 have an inclination toward the outside of the pre-curing chamber 6, and at the same time, refer to the attached manual Fig.13 The air outlet holes 63 on the vertical air discharge 62 also have an upward inclination.

[0060] In the above embodiment, when the coated steel 5 reaches the pre-curing chamber 6, the airflow blown out from the air outlets 63 of the vertical air exhaust 62 on the left and right sides tends to flow upward. When it contacts the protective materials on the left and right sides of the pre-curing chamber 6, it provides an upward blowing force to the protective materials, thereby offsetting the tendency of the protective materials to flow downward due to gravity, thereby further reducing the downward flow tendency of the protective materials on the surface of the steel 5, ensuring the uniformity of the coating layer after the protective material is sprayed on the surface of the steel 5, and ensuring the coating quality. At the same time, the flowing hot air in the pre-curing chamber 6 helps to solidify the coating layer, further reducing the fluidity of the protective material.

[0061] Refer to the instruction manual Fig.14 The present invention also provides a coating method for surface treatment of special steel materials, comprising the following steps:

[0062] Step 1: transport the steel material 5 to the coating spraying room 2 through the first conveying rack 31;

[0063] Step 2: Open the spray head assembly 22 and drive the spray moving seat 21 to reciprocate to spray the protective material on the surface of the steel material 5;

[0064] Step 3: before the center of gravity of the steel 5 leaves the first conveyor frame 31, the abutting frame 11 of the second abutting assembly 102 is driven to move, so that the docking frame 13 of the second abutting assembly 102 docks with the front end of the steel 5, and then the abutting frame 11 of the first abutting assembly 101 is driven to move, so that the docking frame 13 of the first abutting assembly 101 docks with the rear end of the steel 5, providing vertical support for the front end of the steel 5 in a suspended state to prevent the front end of the steel 5 from falling;

[0065] Step 4: drive the abutment frames 11 of the first abutment assembly 101 and the second abutment assembly 102 to move synchronously with the steel material 5, so that the coating layer on the surface of the steel material 5 gradually passes through the suspended solidification zone, so that the coating layer is initially solidified;

[0066] Step 5: When the center of gravity of the steel material 5 reaches the second conveying frame 32, the abutting frames 11 of the first abutting assembly 101 and the second abutting assembly 102 are driven to reset, and wait for the steel material 5 to be completely output by the second conveying frame 32;

[0067] Step 6: The steel material 5 is conveyed to the heating and curing chamber 4 by the second conveying rack 32 , and is further conveyed by the third conveying rack 33 , so that the coating layer of the steel material 5 is completely cured in the heating and curing chamber 4 .

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A coating device for special steel surface treatment, characterized in that: The invention comprises a processing chamber (1), a coating spray chamber (2), a conveying assembly (3) and a heating and curing chamber (4), wherein the conveying assembly (3) comprises a first conveying frame (31) and a second conveying frame (32), the coating spray chamber (2) is located in an area between the first conveying frame (31) and the second conveying frame (32), and a suspended curing area is provided between the second conveying frame (32) and the coating spray chamber (2); The coating spray chamber (2) is provided with an upper and lower spray assembly (201) and a left and right spray assembly (202) for spraying protective materials on the upper and lower sides and the left and right sides of the steel material (5), respectively. The upper and lower spray assembly (201) and the left and right spray assembly (202) are both composed of a spray movable seat (21) and a spray head assembly (22), and the spray head assembly (22) is installed on the spray movable seat (21); A first abutting assembly (101) and a second abutting assembly (102) are respectively arranged in the processing chamber (1) corresponding to the first conveying frame (31) and the area of ​​the first conveying frame (31); the first abutting assembly (101) and the second abutting assembly (102) are both composed of an abutting frame (11) and a horizontal and vertical moving driver; pressure frames (12) are installed at the adjacent ends of the two groups of the abutting frames (11); and a docking frame (13) for abutting against the end of the steel material (5) is installed on the pressure frame (12); The horizontal and vertical movement driver comprises a translation guide (14) and a lifting guide (15); the lifting guide (15) is fixedly mounted in the processing chamber (1); the translation guide (14) is vertically slidably mounted on the lifting guide (15); the abutment frame (11) is laterally slidably mounted on the translation guide (14); and the abutment frame (11) slides on the translation guide (14) along the conveying direction of the first conveying frame (31) and the second conveying frame (32); a lifting driver (151) for driving the translation guide (14) and the abutment frame (11) to move upward and downward is arranged in the processing chamber (1); and a translation driver (141) for driving the abutment frame (11) to move horizontally is arranged on the translation guide (14); The pressure frame (12) is connected to the abutment frame (11) via a pressure component (111); the pressure component (111) is a hydraulic cylinder structure; the pressure component (111) is fixedly mounted on the abutment frame (11); the pressure frame (12) is fixedly mounted on the output end of the pressure component (111); and the docking frame (13) is detachably connected to the abutment frame (11); The docking frame (13) of the second abutting assembly (102) is used to abut against the front end of the steel material (5), and the docking frame (13) of the first abutting assembly (101) is used to abut against the rear end of the steel material (5). Under the drive of the two groups of translation drivers (141), the two groups of abutting frames (11) exert pressure on the steel material (5), so that the docking frame (13) squeezes the end of the steel material (5), and the docking frame (13) of the second abutting assembly (102) generates an upward friction force on the front end of the steel material (5).

2. The coating device for special steel surface treatment according to claim 1, characterized in that: The upper and lower spraying assemblies (201) further include a transverse guide rail (23), the transverse guide rail (23) being fixedly mounted in the coating spraying chamber (2), the spraying movable seat (21) of the upper and lower spraying assemblies (201) being laterally slidably mounted on the transverse guide rail (23), the transverse guide rail (23) being provided with a driving device for driving the spraying movable seat (21) of the upper and lower spraying assemblies (201) to move laterally, the left and right spraying assemblies (202) further include a vertical guide rail (24), the vertical guide rail ( 24) is fixedly installed in the coating spraying room (2), the spraying movable seats (21) of the left and right spraying assemblies (202) are vertically slidably installed on the vertical guide rail (24), and the vertical guide rail (24) is provided with a driving device for driving the spraying movable seats (21) of the left and right spraying assemblies (202) to move vertically, and the spray head assemblies (22) on the spraying movable seats (21) are arranged in at least two groups, and the two groups of spray head assemblies (22) are distributed in an "outward eight" shape in a plane perpendicular to the length of the steel (5).

3. The coating device for special steel surface treatment according to claim 2 is characterized in that: The heating and curing chamber (4) is arranged at the output end of the processing chamber (1); the conveying assembly (3) comprises a third conveying frame (33); the third conveying frame (33) is located inside the heating and curing chamber (4); a heating assembly (41) is arranged inside the heating and curing chamber (4); the heating assembly (41) is used to heat the internal space of the heating and curing chamber (4); the third conveying frame (33) is a belt conveying assembly, and the belt conveying assembly is distributed in a wave shape under the support of a belt roller.

4. The coating device for special steel surface treatment according to claim 3 is characterized in that: A strong magnetic electromagnet (131) is embedded and installed on the docking frame (13). A flexible pad (132) and a pressing pin (133) are also provided at a position of the docking frame (13) corresponding to the end surface of the steel material (5). One end of the pressing pin (133) corresponding to the steel material (5) is a sharp end, and the hardness of the pressing pin (133) is higher than the hardness of the steel material (5). The pressing pin (133) is fixedly installed on the docking frame (13).

5. The coating device for surface treatment of special steel materials according to claim 4, characterized in that: The first abutting assembly (101) and the second abutting assembly (102) are provided with a pressure-blocking assembly (7); the pressure-blocking assembly (7) of the first abutting assembly (101) comprises a flat-pressure pressure-blocking plate (71); the pressure-blocking assembly (7) of the second abutting assembly (102) comprises a pressure-blocking sheet structure (72); the pressure-blocking assembly (7) further comprises an ejection driver (73); the ejection driver (73) is fixedly mounted on a pressure frame (12); the flat-pressure pressure-blocking plate (71) and the pressure-blocking sheet structure (72) are respectively mounted on the output ends of the corresponding ejection drivers (73); the flat-pressure pressure-blocking plate (71) is slidably mounted on a docking frame (13) of the first abutting assembly (101); the pressure-blocking sheet structure (72) is composed of a plurality of groups of vertical thin plates; and the pressure-blocking sheet structure (72) is slidably mounted on a docking frame (13) of the second abutting assembly (102).

6. The coating device for surface treatment of special steel materials according to claim 5, characterized in that: The bottom of the pressure-blocking plate structure (72) corresponding to one end of the steel material (5) is provided with a liquid outlet hole (721), the interior of the pressure-blocking plate structure (72) is provided with a protective material flow channel (722), the pressure-blocking plate structure (72) is provided with a connecting pipe, the protective material flow channel (722) is used to connect the liquid outlet hole (721) and the connecting pipe, the connecting pipe on the pressure-blocking plate structure (72) connects the protective material storage devices of the upper and lower spraying assemblies (201) and the left and right spraying assemblies (202), and is provided with a pump structure.

7. The coating device for surface treatment of special steel materials according to claim 6, characterized in that: A pre-curing chamber (6) is provided at the outlet of the coating spraying chamber (2), and transverse air exhausts (61) are installed on both the upper and lower sides of the pre-curing chamber (6), and vertical air exhausts (62) are installed on both the left and right sides of the pre-curing chamber (6), and the vertical air exhausts (62) are hollow structures. The transverse air exhausts (61) and the vertical air exhausts (62) are connected to an air supply source through air pipes, and the air supply source includes an air pump and an air heating device. The transverse air exhausts (61) and the vertical air exhausts (62) are provided with air outlets (63) on one side corresponding to the steel (5), wherein the air outlets (63) on the transverse air exhausts (61) and the vertical air exhausts (62) are inclined toward the outside of the pre-curing chamber (6), and at the same time, the air outlets (63) on the vertical air exhausts (62) are also inclined upward.

8. A coating method for treating the surface of a special steel material, using the coating device for treating the surface of a special steel material as claimed in claim 6, characterized in that: The following steps are involved: Step 1: transporting the steel material (5) to the coating spraying room (2) via a first transport rack (31); Step 2: opening the spray head assembly (22) and driving the spray moving seat (21) to reciprocate to spray the protective material on the surface of the steel material (5); Step 3: before the center of gravity of the steel (5) leaves the first conveying frame (31), the abutting frame (11) of the second abutting assembly (102) is driven to move so that the docking frame (13) of the second abutting assembly (102) docks with the front end of the steel (5), and then the abutting frame (11) of the first abutting assembly (101) is driven to move so that the docking frame (13) of the first abutting assembly (101) docks with the rear end of the steel (5); Step 4: driving the abutment frames (11) of the first abutment assembly (101) and the second abutment assembly (102) to move synchronously with the steel material (5), so that the coating layer on the surface of the steel material (5) gradually passes through the suspended solidification zone; Step 5: When the center of gravity of the steel (5) reaches the second conveying frame (32), the abutting frames (11) of the first abutting assembly (101) and the second abutting assembly (102) are driven to reset, and the steel (5) is waited for to be completely output by the second conveying frame (32); Step six: The steel material (5) is transported to the heating and curing chamber (4) by the second transport rack (32) and further transported by the third transport rack (33), so that the coating layer of the steel material (5) is completely cured in the heating and curing chamber (4).

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