Hot-dip galvanizing equipment and process for pipe processing

Abstract

The invention belongs to the technical field of hot-dip galvanizing, and in particular to a hot-dip galvanizing device and process for pipe processing. Aiming at the problems that the existing synchronous lifting of multiple pipes easily leads to failure of steel pipe galvanizing, the removal efficiency of galvanizing liquid by air gun is low, and zinc slag cannot be automatically removed, the following scheme is proposed, including a frame, and a cleaning box, a galvanizing box and an inclined material guide plate are arranged from left to right below the frame. The galvanizing box is used to galvanize the pipes, and the cleaning box is used to collect excess galvanizing liquid on the outer wall of the pipes. A convex strip is fixed on one side of the top of the inclined material guide plate. In the present invention, multiple pipes can be separated by driving the trapezoidal plate downward to ensure that the pipes can be galvanized smoothly in the later stage, and the guide inclined plate and the V-shaped plate can be knocked during galvanizing to accumulate and discharge the zinc slag into the U-shaped tube. In addition, while the nozzle sweeps the galvanizing liquid on the outer wall of the pipe at multiple angles, the pipe can also be driven to vibrate, so as to efficiently and comprehensively perform the galvanizing liquid removal operation.

Description

Technical Field

[0001] The invention relates to the technical field of hot-dip galvanizing, and in particular to hot-dip galvanizing equipment and a process for processing pipe fittings. Background Art

[0002] Hot-dip galvanizing, also known as hot-dip galvanizing and hot-dip galvanizing, is an effective way to prevent metal corrosion. The hot-dip galvanizing layer formation process is the process of forming an iron-zinc alloy between the iron matrix and the outermost galvanized layer. The iron-zinc alloy layer is formed on the surface of the workpiece during hot-dip plating, which makes the iron and pure zinc layers well combined, effectively preventing metal corrosion. Hot-dip galvanizing process: degreasing - pickling - washing - plating agent - preheating - hot-dip plating - finishing - passivation - cooling - drying - inspection - storage.

[0003] There are still some shortcomings in the prior art when hot-dip galvanizing pipe fittings:

[0004] 1. In the prior art, when hot-dip galvanizing pipe fittings, multiple pipe fittings need to be hoisted synchronously by ropes, and then the pipe fittings are placed in the galvanizing solution for galvanizing. However, during the galvanizing process, multiple pipe fittings touch each other, resulting in the inability to galvanize the touching positions of the pipe fittings, and the pipe fittings close to each other are easily adhered under the action of the galvanizing solution. The separation of the zinc layer after cooling and solidification will cause the zinc layer to tear off, resulting in failure of galvanizing on the surface of the steel pipe;

[0005] 2. In addition, at the end of galvanizing, the excess galvanizing liquid on the outer wall of the pipe is usually removed by an air gun, which has low cleaning efficiency and is not comprehensive enough;

[0006] 3. The lower layer of the galvanizing solution is precipitated zinc slag. When used for a long time, the thickness of the zinc slag gradually increases, which leads to zinc slag on the surface of the pipe when it is galvanized.

[0007] In view of the above problems, the present invention document proposes a hot-dip galvanizing equipment and process for pipe processing. Summary of the invention

[0008] The purpose of the present invention is to solve the shortcomings that the existing simultaneous lifting of multiple pipes easily leads to the failure of steel pipe galvanizing, the removal efficiency of galvanizing liquid by air gun is low, and the zinc slag cannot be automatically removed, and a hot-dip galvanizing equipment and process for pipe processing are proposed.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A hot-dip galvanizing device for pipe processing, comprising a frame, wherein a cleaning box, a galvanizing box and an inclined material guide plate are arranged from left to right in sequence below the frame, wherein the galvanizing box is used to galvanize the pipes, the cleaning box is used to collect excess galvanizing liquid on the outer wall of the pipes, and a convex strip is fixed on one side of the top of the inclined material guide plate to limit the arranged pipes;

[0011] A main board is arranged below the frame, and two L-shaped clamping plates are slidably connected to the bottom of the main board, and a plurality of electric push rods are fixed on the side of the two L-shaped clamping plates close to each other. The cooperation between the L-shaped clamping plates and the electric push rods is used to clamp a plurality of pipe fittings, and a plurality of plugs are provided on one side of the two L-shaped clamping plates for clamping the pipe fittings;

[0012] It also includes two arc-shaped plates that are sealed and slidably penetrate the galvanizing box. Two air pipes are rotatably connected in the cleaning box. Multiple nozzles are fixed on the sides of the two air pipes that are close to each other, which are used to remove excess galvanizing liquid from the outer wall of the pipe. One end of the two air pipes is connected to an external air pump through a hose.

[0013] A separation structure, arranged in the L-shaped clamping plate, is used to separate two adjacent pipe fittings;

[0014] A cleaning structure is arranged in the cleaning box and is used to vibrate the pipe fittings when the galvanizing liquid on the outer wall of the pipe fittings is purged;

[0015] The rotating structure is arranged in the L-shaped clamping plate and is used to drive the multiple plug posts to rotate back and forth. The rotating structure can not only make the pipes uniformly galvanized in the galvanizing box, but also drive the cleaning structure to operate.

[0016] In a possible design, the separation structure includes a plurality of movable grooves arranged in the L-shaped clamping plate, a plurality of movable grooves are slidably connected with guide blocks, a plurality of guide blocks are rotatably penetrated with rotating shafts, a plurality of rotating shafts are respectively fixedly connected to corresponding plug posts at one end close to the electric push rod, a fixing strip is fixed to a side of the L-shaped clamping plate away from the electric push rod, a trapezoidal plate is slidably connected to one side of the L-shaped clamping plate, a plurality of first springs are fixed to the bottom of the fixing strip and the top of the trapezoidal plate when the trapezoidal plate loses external force, the first springs are used to move the trapezoidal plate upward and reset, a plurality of rotating shafts are rotatably connected to a first connecting rod at one end away from the plug post, a plurality of top ends of the first connecting rods are rotatably connected to the bottom of the trapezoidal plate through a hinge shaft, and the trapezoidal plate moves downward to move the plurality of rotating shafts outward through the first connecting rod;

[0017] The inner walls of the galvanized box on both sides away from each other are slidably connected with pressure plates, and the bottom ends of the two pressure plates touch the bottom ends of the two arc-shaped plates respectively. The bottom fixed block of the pressure plate is used to limit the bottom end of the arc-shaped plate. The top of the arc-shaped plate cooperates with the inclined surface and the top of the trapezoidal plate to drive the trapezoidal plate to move downward. The two sides of the galvanized box away from each other are slidably connected with load-bearing blocks, and the arc-shaped plate penetrates the load-bearing blocks. The inner wall of the side of the load-bearing blocks away from each other is provided with a track groove, and the same pin is slidably matched between the two track grooves. The column is fixed through the arc plate, and the pin column is fixed through the arc plate. The cooperation between the load-bearing block and the arc plate is used to reset the arc plate when it loses pressure; when the L-shaped clamp plate moves downward, the L-shaped clamp plate pushes the pressure plate to move downward, and the pressure plate pushes the arc plate to rotate. The top of the arc plate cooperates with the trapezoidal plate to drive the trapezoidal plate to move downward, and the pressure plate moves down a short distance. Under the action of the arc plate, the trapezoidal plate can be driven to move down a larger distance. Therefore, the trapezoidal plate can drive the rotating shaft to move outward along the trajectory of the moving groove through the first connecting rod, and multiple pipe fittings are separated to avoid two adjacent pipe fittings from touching each other.

[0018] In a possible design, the rotating structure includes a first rack slidably arranged on the side of the L-shaped clamp plate away from the electric push rod, the outer walls of the plurality of rotating shafts are fixedly sleeved with a first gear, and the first gear is meshed with the first rack, a moving frame is fixed on the top side of the first rack, and the moving frame is slidably connected to one side of the L-shaped clamp plate, short racks are fixed on the top inner wall and the bottom inner wall of the moving frame, one side of the L-shaped clamp plate is rotatably connected to a broken gear located in the moving frame, and the broken gear is intermittently meshed with two short racks; the motor drives the broken gear to rotate, and the broken gear drives the moving frame and the first rack to move reciprocatingly in a straight line under the action of two broken racks in the moving frame, and the cooperation of the first rack and the first gear drives multiple pipe fittings to rotate, so that the pipe fittings are evenly galvanized in the galvanizing liquid, and when in the cleaning box, it can drive the cleaning structure to operate.

[0019] In a possible design, the cleaning structure includes a rotating rod that rotates in the cleaning box, and the rotating rod is located below the nozzle, the outer wall of the rotating rod is fixed with a plurality of arc-shaped convex strips, and the arc-shaped convex strips cooperate with the L-shaped clamping plate to drive the L-shaped clamping plate to vibrate up and down, the rotating rod and one end of the two air pipes are both rotated to extend to one side of the cleaning box and are connected through a sprocket and a chain transmission, the outer wall fixed sleeve of one of the air pipes is provided with two second gears, the two second gears are located on both sides of the plurality of nozzles, the outer wall sleeve of the air pipe is provided with two first torsion springs, the ends of the two first torsion springs that are close to each other are respectively fixedly connected to one side of the corresponding second gear, and the ends of the two first torsion springs that are away from each other are respectively fixedly connected to the inner wall of one side of the cleaning box, the first torsion spring is used to drive the air pipe to reset and rotate, one side of the cleaning box slides through two second racks, and the second racks are meshed with the corresponding second gears to drive the air pipe to reciprocate, the second racks cooperate with the moving frame, the moving frame is used to drive the second racks to move, the inner walls of the galvanized box that are away from each other are fixed There are multiple neodymium magnets, and the bottom of the trapezoidal plate is fixedly embedded with an iron layer, and a magnetic attraction is generated between the iron layer and the neodymium magnet, which is used to drive the trapezoidal plate to move downward to separate the multiple pipes; the L-shaped clamping plate moves downward until the pipe moves to the bottom of the nozzle, and the neodymium magnet generates a magnetic attraction on the trapezoidal plate, and the trapezoidal plate moves downward to drive the multiple pipes to separate, and then the air pump injects high-pressure gas into the air pipe, and the gas is sprayed to the pipe through the nozzle, and then the residual gear drives the multiple pipes to reciprocate, and the nozzle removes the galvanizing liquid on the surface of the pipe, and the moving frame moves when it reciprocates. The frame pushes the second rack to move outward, and the second rack drives the air pipe to reciprocate through the cooperation of the second gear and the first torsion spring. The nozzle swings to blow the pipe fittings, and the cleaning is multi-angle and more comprehensive. When the air pipe reciprocates, the sprocket and the chain are cooperated to drive the rotating rod to reciprocate, and the rotating rod drives the L-shaped clamping plate and the main board to reciprocate up and down through the cooperation of the arc convex strip and the L-shaped clamping plate, which is used to drive the pipe fitting to vibrate, so that the pipe fitting can also be vibrated during the high-pressure air blowing process, and the galvanizing liquid removal operation can be carried out efficiently and comprehensively.

[0020] In a possible design, the top of the frame is rotatably connected to a screw rod through a base, the outer wall of the screw rod is threadedly sleeved with a moving block, and the moving block is slidably arranged on the top of the frame, a multi-stage cylinder is fixed to the bottom of the moving block, a cylinder is fixed to the output shaft end of the multi-stage cylinder, a slide plate is slidably connected to the cylinder, a plurality of third springs are fixed between the top of the slide plate and the top inner wall of the cylinder, a limiting ring located below the slide plate is fixed to the inner wall of the cylinder for limiting the slide plate, a plurality of connecting blocks are fixed to the bottom of the slide plate, and the connecting blocks are fixed to the top of the main board, and the cooperation of the slide plate and the third spring is used to play a role of giving way when the main board vibrates up and down.

[0021] In one possible design, a conical platform is fixed on one side of the plug column close to the electric push rod to guide the plug column to be inserted into the pipe fitting. The outer diameter of the plug column matches the inner diameter of the pipe fitting. When multiple pipe fittings are hoisted, the friction between the plug column and the pipe fittings can enable the plug column to drive the pipe fittings to rotate. Two limit strips are fixed to the bottom of the main board to limit the L-shaped clamp.

[0022] In a possible design, the length of the plurality of movable grooves located in the middle is smaller than the length of the plurality of movable grooves located on both sides, so that two adjacent pipes can be separated when the plurality of rotating shafts move away from each other in a later stage.

[0023] In a possible design, the inner walls on both sides of the galvanizing box that are away from each other are fixed with a material guide inclined plate located below the pressure plate, and the bottom of the material guide inclined plate is fixedly connected to the bottom inner wall of the galvanizing box, and a V-shaped plate is fixed to the bottom inner wall of the galvanizing box. Two rotating shafts are penetrated in the galvanizing box in a transverse sealed rotation, and one end of the rotating shaft is sealed and rotated through the material guide inclined plate and the V-shaped plate, and a plurality of knocking rods are fixed to the outer walls of the two rotating shafts, and the plurality of knocking rods are respectively used to knock the material guide inclined plate and the V-shaped plate to shake off the zinc slag on the material guide inclined plate and the V-shaped plate, and the outer wall of the rotating shaft is sleeved with two second torsion springs, and the two second torsion springs are respectively located on both sides below the material guide inclined plate, and the ends of the two second torsion springs that are close to each other are both connected to the rotating shaft. The outer wall of the two second torsion springs is fixedly connected, and the ends of the two second torsion springs that are far away from each other are respectively fixedly connected to the inner walls of both sides of the galvanizing box, which are used to drive the rotating shaft to reset and rotate. The two ends of the rotating shaft extend to both sides of the galvanizing box and are fixed with winding wheels. The outer walls of the two winding wheels are wound with steel wire ropes, and the top of the steel wire ropes is fixedly connected to the bottom of the adjacent load-bearing blocks, and the arc plate drives the rotating shaft to rotate through the load-bearing blocks; the main board and the L-shaped clamping plate move down into the galvanizing box, and the arc plate drives the load-bearing blocks to move up through the cooperation of the track grooves and the pins, and the load-bearing blocks drive the winding wheels and the rotating shaft to rotate through the steel wire ropes, and the rotating shaft drives the knocking rod to rotate, and the knocking rod knocks the guide inclined plate and the V-shaped plate to shake off the zinc slag thereon, so as to facilitate the later removal of the zinc slag.

[0024] In a possible design, a material guide notch is formed between the V-shaped plate and the two material guide inclined plates, a plurality of U-shaped tubes are fixedly passed through the bottom of the galvanizing box, and the two ends of the U-shaped tubes respectively cooperate with the two material guide notches to discharge the vibrated zinc slag into the U-shaped tube, a conveying roller is rotatably connected inside the U-shaped tube, a discharge pipe is fixed on one side of the U-shaped tube, a valve is provided on the outer wall of the discharge pipe, and the conveying roller cooperates with the discharge pipe to discharge the zinc slag, and two closing plates for closing the two ports of the U-shaped tube are slidably connected to the inner wall of the bottom of the galvanizing box, the ends of the two closing plates away from each other are both sealed and slid through the V-shaped plate, and a plurality of tension springs are fixed on the sides of the two closing plates close to each other to reset the two closing plates, a pressure rod is sealed and slid through the V-shaped plate, and the top of the pressure rod is in contact with The bottom of the main board is matched, and a mounting plate is fixed to the bottom end of the pressure rod. A plurality of second connecting rods are rotatably connected to one side of the top of the two closing plates. The top ends of the plurality of second connecting rods are rotatably connected to the bottom of the mounting plate. The pressure rod moves downward to push the two closing plates to move to both sides to close the two ports of the U-shaped tube; the main board and the L-shaped clamping plate move downward into the galvanizing box, and the bottom of the main board pushes the pressure rod and the mounting plate to move downward. The mounting plate pushes the two closing plates to move to both sides through the second connecting rod, and the closing plates can close the two ends of the U-shaped tube; when the U-shaped tube is filled with zinc slag, the closing plate closes the two ports of the U-shaped tube. At this time, the valve on the discharge pipe is opened, and the conveying roller is driven to rotate by a motor. The conveying roller discharges the zinc slag in the U-shaped tube to the outside through the discharge pipe to avoid excessive zinc slag in the galvanizing box affecting the galvanizing of the pipe fittings.

[0025] A hot-dip galvanizing process for processing pipe fittings using the hot-dip galvanizing equipment for processing pipe fittings comprises the following steps:

[0026] S1. Degreasing: Through the shot blasting machine, the gray skin and core sand on the inner and outer surfaces of the pipe are completely removed;

[0027] S2. Pickling: Immerse the pipe fittings in a pickling tank to remove the oxide scale and rust on the surface (commonly used acids are hydrochloric acid and sulfuric acid). Pickle for 2 minutes. The pickling solution is a hydrochloric acid solution with a concentration of 15%-20%. The pipe fittings must be heated before pickling, and the water temperature must not be lower than 80°C. After pickling, use clean water to clean the acid on the surface;

[0028] S3, dipping in plating agent: immerse the pipe fittings in a plating agent tank. The plating agent is an aqueous solution of ammonium chloride and zinc chloride. The ratio of zinc chloride to ammonium chloride is strictly controlled at 1:0.8, and the pH value is between 5-6. This further cleans the surface of the pipe fittings and promotes the bonding of the zinc layer and the substrate. After the plating agent is immersed, it is dried;

[0029] S4. Hot-dip galvanizing: Multiple pipes are clamped at the same time by hot-dip galvanizing equipment, and the dried pipes are immersed in molten zinc liquid for a certain period of time to allow the zinc liquid to react with the pipe matrix to form a zinc-iron alloy layer. When the pipes are immersed in the galvanizing liquid, multiple pipes are moved outward to avoid contact between two adjacent pipes. During the hot-dip galvanizing process, the temperature of the zinc liquid needs to be controlled between 630℃-635℃;

[0030] S5. Removal: When hot-dip galvanizing is carried out through hot-dip galvanizing equipment, the zinc slag at the bottom of the galvanizing liquid can be pushed to both sides, which is convenient for removing the zinc slag later;

[0031] S6. Cleaning: After hot-dip galvanizing, high-pressure gas is introduced into the hot-dip galvanizing equipment to purge the outer wall of the pipe fittings. During the purge, the pipe fittings can be driven to vibrate, and the excess zinc liquid and zinc nodules are completely removed to make the coating more uniform.

[0032] S7, cooling: cooling the hot-dip galvanized pipes naturally;

[0033] S8, passivation: passivation treatment of the coating is performed by passivation solution;

[0034] S9, Rinse: Rinse the passivated pipes with clean water to remove the residual passivation liquid.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] In the present invention, multiple movable grooves are slidably connected with guide blocks, multiple guide blocks are rotatably penetrated with rotating shafts, one side of the L-shaped clamp is slidably connected with a trapezoidal plate, one end of multiple rotating shafts is rotatably connected with a first connecting rod, the top end of the first connecting rod is rotatably connected with the bottom of the trapezoidal plate, and two arc plates are sealed and slidably penetrated in the galvanized box; the L-shaped clamp pushes the pressure plate to move downward and drives the arc plate to rotate, and the top end of the arc plate cooperates with the trapezoidal plate to drive the trapezoidal plate to move downward, so the trapezoidal plate can drive the rotating shaft to move outward along the trajectory of the movable groove through the first connecting rod, and multiple pipe fittings are separated to avoid two adjacent pipe fittings from touching each other;

[0037] In the present invention, the cleaning structure includes a rotating rod rotating in the cleaning box, the outer wall of the rotating rod is fixed with a plurality of arc-shaped convex strips, the rotating rod is connected to one end of the two air pipes through a sprocket and a chain transmission, the outer wall of one of the air pipes is fixed with two second gears, and one side of the cleaning box is slidably penetrated with two second racks; the multi-stage cylinder drives the L-shaped clamping plate to move downward, and then the high-pressure gas is injected into the air pipe through the air pump, and sprayed to the pipe fittings through the nozzle, and then the residual gear drives the plurality of pipe fittings to reciprocate through the moving frame, and the moving frame drives the air pipe to reciprocate through the cooperation of the second rack and the second gear, and the multi-angle cleaning is carried out, and at the same time, the air pipe drives the rotating rod to rotate, and the cooperation of the arc-shaped convex strip and the L-shaped clamping plate drives the L-shaped clamping plate and the main board to reciprocate up and down, so as to drive the pipe fittings to vibrate, so as to efficiently and comprehensively carry out the cleaning operation of the galvanizing liquid;

[0038] In the present invention, two rotating shafts are sealed and rotated inside the galvanizing box, and multiple knocking rods are fixed on the outer walls of the two rotating shafts. The two ends of the rotating shaft extend to the two sides of the galvanizing box respectively and are fixed with winding wheels. The outer walls of the two winding wheels are wound with steel wire ropes, and the top of the steel wire ropes are fixedly connected to the bottom of the adjacent load-bearing blocks. When the L-shaped clamp drives the pressure plate to move downward, the arc plate drives the load-bearing block to move upward through the cooperation of the track groove and the pin column. The load-bearing block drives the winding wheel and the rotating shaft to rotate through the steel wire rope, and the rotating shaft drives the knocking rod to rotate. The knocking rod knocks the material guide inclined plate and the V-shaped plate to shake off the zinc slag thereon, which is convenient for removing the zinc slag in the later stage.

[0039] In the present invention, a plurality of U-shaped tubes are fixedly penetrated at the bottom of the galvanizing box, a conveying roller is rotatably connected inside the U-shaped tube, two closing plates are slidably connected to the inner wall of the bottom of the galvanizing box, a pressure rod is sealably slidably penetrated inside the V-shaped plate, a plurality of second connecting rods are rotatably connected to the tops of the two closing plates, and the tops of the plurality of second connecting rods are rotatably connected to the bottom of the mounting plate; the main board and the L-shaped clamping plate move downward into the galvanizing box, the bottom of the main board pushes the pressure rod and the mounting plate to move downward, and the mounting plate pushes the two closing plates to move to both sides through the second connecting rod to close the two ends of the U-shaped tube; at the same time, the motor drives the conveying roller to rotate, and the conveying roller discharges the zinc slag in the U-shaped tube to the outside through the discharge pipe, so as to avoid excessive zinc slag in the galvanizing box affecting the galvanizing of the pipe fittings;

[0040] In the present invention, a plurality of pipe fittings can be separated by driving the trapezoidal plate downward, thereby ensuring that the pipe fittings can be smoothly galvanized in the later stage. During galvanizing, the guide inclined plate and the V-shaped plate can be knocked to accumulate the zinc slag and discharge it into the U-shaped tube, so as to facilitate the removal of the zinc slag in the later stage. In addition, while the nozzle sweeps the galvanizing liquid on the outer wall of the pipe fitting at multiple angles, the pipe fitting can also be driven to vibrate, thereby efficiently and comprehensively removing the galvanizing liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1A schematic diagram of the three-dimensional structure of a hot-dip galvanizing device for pipe processing provided in Example 1 of the present invention;

[0042] Figure 2 This is a schematic diagram of a front cross-sectional structure of a hot-dip galvanizing device for pipe processing provided in Example 1 of the present invention;

[0043] Figure 3 A schematic diagram of a three-dimensional exploded structure of a cylinder, a slide plate and a third spring of a hot-dip galvanizing device for pipe processing provided in Example 1 of the present invention;

[0044] Figure 4 A schematic diagram of a three-dimensional exploded structure of a main board and an L-shaped clamping plate of a hot-dip galvanizing equipment for pipe processing provided in Example 1 of the present invention;

[0045] Figure 5 A schematic diagram of a three-dimensional exploded structure of an L-shaped clamping plate, a trapezoidal plate and a movable frame of a hot-dip galvanizing equipment for pipe processing provided by Example 1 of the present invention;

[0046] Figure 6 A schematic diagram of a three-dimensional cross-sectional structure of a galvanizing box of a hot-dip galvanizing equipment for pipe processing provided in Example 1 of the present invention;

[0047] Figure 7 A schematic diagram of a three-dimensional cross-sectional structure of a load-bearing block of a hot-dip galvanizing equipment for pipe processing provided in Example 1 of the present invention;

[0048] Figure 8 A schematic diagram of the three-dimensional structure of a cleaning box, an air pipe and a rotating rod of a hot-dip galvanizing equipment for pipe processing provided in Example 1 of the present invention;

[0049] Fig. 9 A schematic diagram of the three-dimensional structure of an air pipe, a second gear and a second rack of a hot-dip galvanizing equipment for pipe processing provided in Example 1 of the present invention;

[0050] Fig.10 This is a schematic diagram of a side cross-sectional structure of a galvanizing box of a hot-dip galvanizing equipment for pipe processing provided in Example 2 of the present invention.

[0051] Fig.11 A schematic diagram of the three-dimensional structure of a V-shaped plate, a material guide inclined plate, a closing plate and a rotating shaft of a hot-dip galvanizing equipment for pipe processing provided in Example 2 of the present invention;

[0052] Fig.12 This is a schematic diagram of the three-dimensional structure of a closing plate, a second connecting rod and a mounting plate of a hot-dip galvanizing equipment for pipe processing provided in Example 2 of the present invention.

[0053] In the figure: 1, frame; 2, screw rod; 3, moving block; 4, multi-stage cylinder; 5, main board; 6, inclined guide plate; 7, L-shaped clamping plate; 8, electric push rod; 9, limit bar; 10, moving groove; 11, guide block; 12, rotating shaft; 13, plug column; 14, conical table; 15, fixing bar; 16, first spring; 17, trapezoidal plate; 18, first connecting rod; 19, first gear; 20, first rack; 21, moving frame; 22, residual gear; 23, galvanized box; 24, pressure plate; 25, arc plate; 26, load-bearing block; 27, track groove; 28, pin column; 29, cleaning box ; 30. air pipe; 31. nozzle; 32. rotating rod; 33. neodymium magnet; 34. second gear; 35. second rack; 36. first torsion spring; 37. cylinder; 38. slide plate; 39. third spring; 40. connecting block; 41. limiting ring; 42. guide inclined plate; 43. V-shaped plate; 44. U-shaped tube; 45. conveying roller; 46. discharge pipe; 47. pressure rod; 48. mounting plate; 49. closing plate; 50. second connecting rod; 51. tension spring; 52. rotating shaft; 53. knocking rod; 54. second torsion spring; 55. winding wheel; 56. wire rope; 57. arc convex strip. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0055] Example 1: Reference Figure 1 and Figure 2 A hot dip galvanizing equipment for pipe processing, which is used in the field of hot dip galvanizing, includes a frame 1, and a cleaning box 29, a galvanizing box 23 and an inclined guide plate 6 are arranged from left to right below the frame 1. The galvanizing box 23 is used to galvanize the pipe, and the cleaning box 29 is used to collect excess galvanizing liquid on the outer wall of the pipe. A convex strip is fixed on one side of the top of the inclined guide plate 6 to limit the arranged pipes.

[0056] Reference Figure 2 and Figure 4 The main board 5 is arranged below the frame 1, and two L-shaped clamping plates 7 are slidably connected to the bottom of the main board 5. Multiple electric push rods 8 are fixed to the side of the two L-shaped clamping plates 7 close to each other, and the cooperation between the L-shaped clamping plates 7 and the electric push rods 8 is used to clamp multiple pipe fittings. Multiple plugs 13 are arranged on one side of the two L-shaped clamping plates 7 for clamping pipe fittings.

[0057] Reference Figure 6 and Figure 8The equipment also includes two arc-shaped plates 25 that are sealed and slidably penetrate the galvanizing box 23. Two air pipes 30 are rotatably connected in the cleaning box 29. Multiple nozzles 31 are fixed on the sides of the two air pipes 30 that are close to each other, which are used to remove excess galvanizing liquid from the outer wall of the pipe. One end of the two air pipes 30 is connected to an external air pump through a hose.

[0058] Reference Figure 4-Figure 7 The separation structure includes a plurality of movable grooves 10 arranged in the L-shaped clamping plate 7. A guide block 11 is slidably connected in each of the plurality of movable grooves 10, and a rotating shaft 12 is rotatably passed through each of the plurality of guide blocks 11. The ends of the plurality of rotating shafts 12 close to the electric push rod 8 are fixedly connected to the corresponding plug posts 13 respectively. A fixing bar 15 is fixed to the side of the L-shaped clamping plate 7 away from the electric push rod 8. A trapezoidal plate 17 is slidably connected to one side of the L-shaped clamping plate 7, and a plurality of first springs 16 are fixed to the bottom of the fixing bar 15 and the top of the trapezoidal plate 17. The first spring 16 is used to move the trapezoidal plate 17 upward and reset when the trapezoidal plate 17 loses external force. The ends of the plurality of rotating shafts 12 away from the plug posts 13 are rotatably connected to the first connecting rod 18, and the top ends of the plurality of first connecting rods 18 are rotatably connected to the bottom of the trapezoidal plate 17 through hinge shafts. The trapezoidal plate 17 moves downward to move the plurality of rotating shafts 12 outward through the first connecting rod 18. The inner walls of the galvanizing box 23 on both sides away from each other are slidably connected with pressure plates 24, and the bottom ends of the two pressure plates 24 touch the bottom ends of the two arc plates 25 respectively. The bottom fixed block of the pressure plate 24 is used to limit the bottom end of the arc plate 25. The top of the arc plate 25 cooperates with the inclined surface and the top of the trapezoidal plate 17 to drive the trapezoidal plate 17 to move downward. The two sides of the galvanizing box 23 away from each other are slidably connected with load-bearing blocks 26, and the arc plate 25 passes through the load-bearing blocks 26. The inner wall of the side of the load-bearing blocks 26 away from each other is provided with a track groove 27, and the same pin 28 is slidably matched between the two track grooves 27, and the pin 28 is fixedly passed through the arc plate 25. The cooperation between the load-bearing block 26 and the arc plate 25 is used to reset the arc plate 25 when the pressure is lost.

[0059] Specifically, when the L-shaped clamping plate 7 moves downward, the L-shaped clamping plate 7 pushes the pressing plate 24 to move downward, and the pressing plate 24 pushes the arc plate 25 to rotate. The top of the arc plate 25 cooperates with the trapezoidal plate 17 to drive the trapezoidal plate 17 to move downward. The pressing plate 24 moves downward a short distance, and under the action of the arc plate 25, the trapezoidal plate 17 can be driven to move downward a larger distance. Therefore, the trapezoidal plate 17 can drive the rotating shaft 12 to move outward along the track of the moving groove 10 through the first connecting rod 18, so that multiple pipe fittings are separated and two adjacent pipe fittings are prevented from touching each other.

[0060] Reference Figure 4 and Figure 5The rotating structure includes a first rack 20 slidably arranged on the side of the L-shaped clamp 7 away from the electric push rod 8. The outer walls of the multiple rotating shafts 12 are fixedly sleeved with first gears 19, and the first gears 19 are meshed with the first rack 20. A moving frame 21 is fixed to one side of the top of the first rack 20, and the moving frame 21 is slidably connected to one side of the L-shaped clamp 7. Short racks are fixed to the top inner wall and the bottom inner wall of the moving frame 21. A residual gear 22 located in the moving frame 21 is rotatably connected to one side of the L-shaped clamp 7, and the residual gear 22 is intermittently meshed with two short racks.

[0061] Specifically, the motor drives the residual gear 22 to rotate, and the residual gear 22 drives the moving frame 21 and the first rack 20 to move back and forth linearly under the action of the two broken racks in the moving frame 21. The cooperation between the first rack 20 and the first gear 19 drives multiple pipes to rotate, so that the pipes are uniformly galvanized in the galvanizing liquid. And when in the cleaning box 29, it can drive the cleaning structure to run to vibrate the pipes and remove excess galvanizing liquid.

[0062] Reference Figure 8 and Fig. 9 The cleaning structure includes a rotating rod 32 rotatably arranged in the cleaning box 29, and the rotating rod 32 is located below the nozzle 31. The outer wall of the rotating rod 32 is fixed with a plurality of arc-shaped convex strips 57, which cooperate with the L-shaped clamping plate 7 to drive the L-shaped clamping plate 7 to vibrate up and down. The rotating rod 32 and one end of the two air pipes 30 are both rotated and extended to one side of the cleaning box 29, and are connected through a sprocket and a chain transmission. The outer wall of one of the air pipes 30 is fixedly sleeved with two second gears 34, and the two second gears 34 are located on both sides of the plurality of nozzles 31. The outer wall of the air pipe 30 is sleeved with two first torsion springs 36, and the ends of the two first torsion springs 36 that are close to each other are respectively fixedly connected to one side of the corresponding second gear 34, while the ends of the two first torsion springs 36 that are far away from each other are respectively fixedly connected to one side of the inner wall of the cleaning box 29. The function of the first torsion spring 36 is to drive the air pipe 30 to reset and rotate. Two second racks 35 are slidably penetrated on one side of the cleaning box 29, and the two second racks 35 are meshed with the corresponding second gears 34 to drive the air pipe 30 to reciprocate. The second rack 35 cooperates with the moving frame 21, and the moving frame 21 pushes the second rack 35 to move when reciprocating. Multiple neodymium magnets 33 are fixed to the inner walls of the two sides of the galvanized box 23 that are away from each other, and an iron layer is fixedly embedded at the bottom of the trapezoidal plate 17. A magnetic attraction is generated between the iron layer and the neodymium magnet 33, and this magnetic attraction is used to drive the trapezoidal plate 17 to move downward, thereby separating multiple pipes.

[0063] Specifically, the L-shaped clamp 7 moves downward until the pipe moves to the bottom of the nozzle 31. The neodymium magnet 33 generates a magnetic attraction force on the trapezoidal plate 17, causing the trapezoidal plate 17 to move downward, thereby driving the multiple pipes to separate. High-pressure gas is injected into the air pipe 30 through an air pump, and the gas is sprayed toward the pipe through the nozzle 31. The residual gear 22 drives the multiple pipes to rotate reciprocatingly, and the nozzle 31 removes the galvanizing liquid on the surface of the pipe. When the moving frame 21 reciprocates, it pushes the second rack 35 to move outward. The second rack 35 drives the air pipe 30 to reciprocate through the cooperation of the second gear 34 and the first torsion spring 36, so that the nozzle 31 swings and purges the pipe, and the cleaning is carried out from multiple angles, making the cleaning more comprehensive. When the air pipe 30 reciprocates, the rotating rod 32 is driven to reciprocate through the cooperation of the sprocket and the chain. The rotating rod 32 drives the L-shaped clamping plate 7 and the main plate 5 to move up and down through the cooperation of the arc-shaped convex strip 57 and the L-shaped clamping plate 7, so that the pipe fittings vibrate. In this way, during the high-pressure air purging process, the galvanizing liquid can be removed efficiently and comprehensively through the vibration of the pipe fittings.

[0064] Reference Figure 2 and Figure 3 , the screw rod 2 is connected to the top of the frame 1 through the base rotation, and the outer wall of the screw rod 2 is threadedly sleeved with a moving block 3. The moving block 3 is slidably set on the top of the frame 1 and can move along the screw rod 2. A multi-stage cylinder 4 is fixed to the bottom of the moving block 3, and a cylinder 37 is fixed to the output shaft end of the multi-stage cylinder 4. A slide plate 38 is slidably connected in the cylinder 37, and a plurality of third springs 39 are fixed between the top of the slide plate 38 and the top inner wall of the cylinder 37. These third springs 39 are used to buffer and give way when the main board 5 vibrates up and down. A limiting ring 41 located below the slide plate 38 is fixed to the inner wall of the cylinder 37, which is used to limit the slide plate 38 and prevent it from slipping out of the cylinder 37. A plurality of connecting blocks 40 are fixed to the bottom of the slide plate 38, and these connecting blocks 40 are fixed to the top of the main board 5 to connect the slide plate 38 and the main board 5.

[0065] Specifically, when the mainboard 5 vibrates up and down, the cooperation between the slide plate 38 and the third spring 39 can play a role of buffering and giving way, thereby protecting the device from damage.

[0066] Reference Figure 4 A conical platform 14 is fixed on the side of the plug column 13 close to the electric push rod 8. The conical platform 14 is used to guide the plug column 13 to be inserted into the pipe. The outer diameter of the plug column 13 matches the inner diameter of the pipe, so that when multiple pipes are hoisted, the friction between the plug column 13 and the pipe can cause the plug column 13 to drive the pipe to rotate. Two limit bars 9 are fixed at the bottom of the main board 5. The two limit bars 9 are used to limit the L-shaped clamping plate 7 to prevent it from deviating from the predetermined trajectory during movement.

[0067] Reference Figure 5The length of the multiple moving grooves 10 in the middle is less than the length of the multiple moving grooves 10 on both sides. This design is to better separate the two adjacent pipes when the multiple rotating shafts 12 are away from each other in the later stage to avoid them from touching or interfering with each other.

[0068] Example 2: Reference Figure 10-12 , improved on the basis of Example 1: the hot-dip galvanizing equipment mainly includes a galvanizing box 23, and a pressing plate 24 for pressing the pipe fittings is provided in the galvanizing box 23. The inner walls of the galvanizing box 23 on both sides away from each other are fixed with a guide inclined plate 42 located below the pressing plate 24, and the bottom of the guide inclined plate 42 is fixedly connected to the bottom inner wall of the galvanizing box 23. A V-shaped plate 43 is also fixed to the bottom inner wall of the galvanizing box 23, and a guide notch is formed between the V-shaped plate 43 and the two guide inclined plates 42. Two rotating shafts 52 are transversely sealed and rotated in the galvanizing box 23, and one end of the rotating shaft 52 is sealed and rotated through the guide inclined plate 42 and the V-shaped plate 43. The outer walls of the two rotating shafts 52 are fixed with a plurality of knocking rods 53, and the knocking rods 53 are used to knock the guide inclined plate 42 and the V-shaped plate 43 respectively, so as to shake off the zinc slag on the guide inclined plate 42 and the V-shaped plate 43. The outer wall of the rotating shaft 52 is sleeved with two second torsion springs 54, and the two second torsion springs 54 are respectively located below the material guide inclined plate 42. The ends of the two second torsion springs 54 that are close to each other are fixedly connected to the outer wall of the rotating shaft 52, and the ends that are far away from each other are respectively fixedly connected to the inner walls of both sides of the galvanizing box 23, and are used to drive the rotating shaft 52 to reset and rotate. The two ends of the rotating shaft 52 extend to both sides of the galvanizing box 23 and are fixed with winding wheels 55, and the outer walls of the two winding wheels 55 are wound with steel wire ropes 56. The top of the steel wire rope 56 is fixedly connected to the bottom of the adjacent load-bearing block 26. When the arc plate 25 drives the rotating shaft 52 to rotate through the load-bearing block 26, the rotating shaft 52 will drive the knocking rod 53 to rotate, and the knocking rod 53 knocks the material guide inclined plate 42 and the V-shaped plate 43 to shake off the zinc slag thereon, which is convenient for removing the zinc slag in the later stage.

[0069] refer to Figure 10-12, a plurality of U-shaped tubes 44 are fixedly passed through the bottom of the galvanizing box 23, and the two ends of the U-shaped tube 44 are respectively matched with two guide slots to discharge the zinc slag that has been shaken off into the U-shaped tube 44. A conveying roller 45 is rotatably connected inside the U-shaped tube 44, and a discharge pipe 46 is fixed on one side of the U-shaped tube 44, and a valve is provided on the outer wall of the discharge pipe 46. The conveying roller 45 and the discharge pipe 46 are matched to discharge the zinc slag. Two closing plates 49 for closing the two ports of the U-shaped tube 44 are slidably connected to the inner wall of the bottom of the galvanizing box 23, and the ends of the two closing plates 49 that are away from each other are sealed and slid through the V-shaped plate 43. A plurality of tension springs 51 are fixed on the side where the two closing plates 49 are close to each other, which are used to reset the two closing plates 49. A pressure rod 47 is sealed and slidably passed through the V-shaped plate 43, and the top of the pressure rod 47 is matched with the bottom of the main board 5. A mounting plate 48 is fixed to the bottom end of the pressure rod 47 , and a plurality of second connecting rods 50 are rotatably connected to one side of the top of the two closing plates 49 , and the top ends of the plurality of second connecting rods 50 are rotatably connected to the bottom of the mounting plate 48 .

[0070] Specifically, when the main board 5 and the L-shaped clamping plate 7 move downward into the galvanizing box 23, the bottom of the main board 5 will push the pressure rod 47 and the mounting plate 48 downward. The mounting plate 48 pushes the two closing plates 49 to move to both sides through the second connecting rod 50 to close the two ports of the U-shaped tube 44. When the U-shaped tube 44 is filled with zinc slag, the closing plate 49 closes the two ports of the U-shaped tube 44. At this time, the valve on the discharge pipe 46 can be opened, and the conveying roller 45 can be driven to rotate by the motor. The conveying roller 45 discharges the zinc slag in the U-shaped tube 44 to the outside through the discharge pipe 46 to prevent the zinc slag in the galvanizing box 23 from affecting the galvanizing of the pipe fittings.

[0071] A hot-dip galvanizing process for processing pipe fittings using the hot-dip galvanizing equipment for processing pipe fittings comprises the following steps:

[0072] S1. Degreasing: Through the shot blasting machine, the gray skin and core sand on the inner and outer surfaces of the pipe are completely removed;

[0073] S2. Pickling: Immerse the pipe fittings in a pickling tank to remove the oxide scale and rust on the surface (commonly used acids are hydrochloric acid and sulfuric acid). Pickle for 2 minutes. The pickling solution is a hydrochloric acid solution with a hydrochloric acid concentration of 15%-20%. The pipe fittings must be heated before pickling, and the water temperature must not be lower than 80°C. After pickling, use clean water to clean the acid on the surface;

[0074] S3, dipping in plating agent: immerse the pipe fittings in a plating agent tank. The plating agent is an aqueous solution of ammonium chloride and zinc chloride. The ratio of zinc chloride to ammonium chloride is strictly controlled at 1:0.8, and the pH value is between 5-6. This further cleans the surface of the pipe fittings and promotes the bonding of the zinc layer and the substrate. After the plating agent is immersed, it is dried;

[0075] S4. Hot-dip galvanizing: Multiple pipes are clamped at the same time by hot-dip galvanizing equipment, and the dried pipes are immersed in molten zinc liquid for a certain period of time to allow the zinc liquid to react with the pipe matrix to form a zinc-iron alloy layer. When the pipes are immersed in the galvanizing liquid, multiple pipes are moved outward to avoid contact between two adjacent pipes. During the hot-dip galvanizing process, the temperature of the zinc liquid needs to be controlled between 630℃-635℃;

[0076] S5. Removal: When hot-dip galvanizing is carried out through hot-dip galvanizing equipment, the zinc slag at the bottom of the galvanizing liquid can be pushed to both sides, which is convenient for removing the zinc slag later;

[0077] S6. Cleaning: After hot-dip galvanizing, high-pressure gas is introduced into the hot-dip galvanizing equipment to purge the outer wall of the pipe fittings. During the purge, the pipe fittings can be driven to vibrate, and the excess zinc liquid and zinc nodules are completely removed to make the coating more uniform.

[0078] S7, cooling: cooling the hot-dip galvanized pipes naturally;

[0079] S8, passivation: passivation treatment of the coating is performed by passivation solution;

[0080] S9, Rinse: Rinse the passivated pipes with clean water to remove the residual passivation liquid.

[0081] A method for using hot-dip galvanizing equipment for pipe processing:

[0082] S1. Place the pipes after being dipped in the plating agent on the inclined guide plate 6. Under the action of the inclined guide plate 6, multiple pipes are arranged in the direction of the galvanizing box 23, and the pipes are limited under the action of the convex strips. The screw rod 2 and the moving block 3 cooperate to drive the main board 5 to move above the multiple pipes, and the multi-stage cylinder 4 drives the main board 5 to move downward until the two L-shaped clamps 7 cover the multiple pipes; then the electric push rod 8 contracts, and the two L-shaped clamps 7 drive the corresponding plugs 13 to move to the middle, and the corresponding two plugs 13 are inserted into the corresponding pipes, and the outer diameter of the plug 13 matches the inner diameter of the pipe. In the later stage, the friction between the outer wall of the plug 13 and the inner wall of the pipe can drive the pipe to rotate;

[0083] S2, then the L-shaped clamping plate 7 moves the multiple pipe fittings to the top of the galvanizing box 23, and the multi-stage cylinder 4 drives the L-shaped clamping plate 7 and the main plate 5 to move down into the galvanizing box 23 until the pipe fittings are immersed in the galvanizing solution, and when the L-shaped clamping plate 7 moves down, the L-shaped clamping plate 7 pushes the pressing plate 24 to move down, and the pressing plate 24 pushes the arc plate 25 to rotate, and the top of the arc plate 25 cooperates with the trapezoidal plate 17 to drive the trapezoidal plate 17 to move down, and the pressing plate 24 moves down a short distance, and the trapezoidal plate 17 can be driven to move down under the action of the arc plate 25. The larger distance, the trapezoidal plate 17 can drive the rotating shaft 12 to move outward along the track of the moving groove 10 through the first connecting rod 18, and the multiple pipes are separated to avoid the two adjacent pipes from touching each other; then the motor drives the residual gear 22 to rotate, and the residual gear 22 drives the moving frame 21 and the first rack 20 to move back and forth linearly under the action of the two broken racks in the moving frame 21, and the cooperation of the first rack 20 and the first gear 19 drives the multiple pipes to rotate, so that the pipes are evenly galvanized in the galvanizing solution;

[0084] S3. After the galvanizing is completed, the L-shaped clamping plate 7 is moved to the top of the cleaning box 29, and the multi-stage cylinder 4 drives the L-shaped clamping plate 7 to move downward until the pipe is moved to the bottom of the nozzle 31. At this time, the neodymium magnet 33 generates a magnetic attraction on the trapezoidal plate 17. The trapezoidal plate 17 moves downward to drive the multiple pipes to separate. At this time, the second rack 35 cooperates with the moving frame 21, and then the air pump injects high-pressure gas into the air pipe 30. The gas is sprayed to the pipe through the nozzle 31, and then the residual gear 22 drives the multiple pipes to reciprocate. The nozzle 31 removes the galvanizing liquid on the surface of the pipe, and the moving frame 21 pushes the moving frame 21 when it moves back and forth. The second rack 35 moves outward, and the second rack 35 drives the air pipe 30 to reciprocate through the cooperation of the second gear 34 and the first torsion spring 36. The nozzle 31 swings and purges the pipe fittings, and the cleaning is more comprehensive at multiple angles. When the air pipe 30 reciprocates, the sprocket and the chain drive the rotating rod 32 to reciprocate. The rotating rod 32 drives the L-shaped clamping plate 7 and the main board 5 to reciprocate up and down through the cooperation of the arc-shaped convex strip 57 and the L-shaped clamping plate 7, which is used to drive the pipe fittings to vibrate, so that the pipe fittings can also vibrate during the high-pressure air cleaning process, and the galvanizing liquid cleaning operation is carried out efficiently and comprehensively.

[0085] S4, when galvanizing in step S2, the main board 5 and the L-shaped clamping plate 7 move down into the galvanizing box 23, and when the L-shaped clamping plate 7 drives the pressing plate 24 to move down, the arc plate 25 drives the load-bearing block 26 to move up through the cooperation of the track groove 27 and the pin 28, and the load-bearing block 26 drives the winding wheel 55 and the rotating shaft 52 to rotate through the wire rope 56, and the rotating shaft 52 drives the knocking rod 53 to rotate, and the knocking rod 53 knocks the guide inclined plate 42 and the V-shaped plate 43 to shake off the zinc slag thereon, and at the same time, the bottom of the main board 5 pushes the pressing plate 24 to move upward ..., and the rotating shaft 52 drives the knocking rod 53 to rotate, and the knocking rod 53 knocks the guide inclined plate 42 and the V-shaped plate 43 to shake off the zinc slag thereon, and at the same time, the bottom of the main board 5 pushes the pressing plate 24 to move upward, and the load-bearing block 26 drives the winding wheel 55 and the rotating shaft 52 to rotate, and the rotating shaft 52 drives the knocking rod 53 to rotate, and the knocking rod 53 knocks the guide inclined plate 42 and the V-shaped plate The rod 47 and the mounting plate 48 move downward, and the mounting plate 48 pushes the two closing plates 49 to move to both sides through the second connecting rod 50, and the closing plates 49 can close the two ends of the U-shaped tube 44; when the U-shaped tube 44 is filled with zinc slag, the closing plates 49 close the two ports of the U-shaped tube 44, and at this time, the valve on the discharge pipe 46 is opened, and the conveying roller 45 is driven by the motor to rotate, and the conveying roller 45 discharges the zinc slag in the U-shaped tube 44 to the outside through the discharge pipe 46, so as to avoid excessive zinc slag in the galvanizing box 23 affecting the galvanizing of the pipe fittings.

[0086] However, as is well known to those skilled in the art, the working principle and wiring method of the multi-stage cylinder 4 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any selections according to their needs or convenience.

[0087] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hot dip galvanizing equipment for pipe processing, characterized in that: The machine comprises a frame (1), wherein a cleaning box (29), a galvanizing box (23) and an inclined material guide plate (6) are arranged in sequence from left to right below the frame (1), wherein the galvanizing box (23) is used to galvanize the pipe fittings, the cleaning box (29) is used to collect excess galvanizing liquid on the outer wall of the pipe fittings, and a convex strip is fixed on one side of the top of the inclined material guide plate (6) to limit the position of the arranged pipe fittings; A main board (5) is arranged below the frame (1); two L-shaped clamping plates (7) are slidably connected to the bottom of the main board (5); a plurality of electric push rods (8) are fixed to the sides of the two L-shaped clamping plates (7) close to each other; the L-shaped clamping plates (7) and the electric push rods (8) cooperate to clamp a plurality of pipe fittings; a plurality of plug posts (13) are provided on one side of the two L-shaped clamping plates (7) for clamping the pipe fittings; It also includes two arc-shaped plates (25) that are sealed and slidably penetrate the galvanizing box (23), and two air pipes (30) are rotatably connected in the cleaning box (29). A plurality of nozzles (31) are fixed on the sides of the two air pipes (30) that are close to each other, and are used to remove excess galvanizing liquid from the outer wall of the pipe. One end of the two air pipes (30) is connected to an external air pump through a hose; A separation structure, arranged in the L-shaped clamping plate (7), for separating two adjacent pipe fittings; A cleaning structure is arranged in the cleaning box (29) and is used to vibrate the pipe when purging the galvanizing liquid on the outer wall of the pipe; A rotating structure is arranged in the L-shaped clamping plate (7) and is used to drive the plurality of plug posts (13) to rotate back and forth. The rotating structure can not only make the pipes uniformly galvanized in the galvanizing box (23), but also drive the cleaning structure to operate; The separation structure comprises a plurality of movable grooves (10) arranged in the L-shaped clamping plate (7), a plurality of movable grooves (10) are slidably connected with guide blocks (11), a plurality of guide blocks (11) are rotatably penetrated with rotating shafts (12), a plurality of rotating shafts (12) are respectively fixedly connected to corresponding plug posts (13) at one end close to the electric push rod (8), a fixing strip (15) is fixedly provided on a side of the L-shaped clamping plate (7) away from the electric push rod (8), a trapezoidal plate (17) is slidably connected to one side of the L-shaped clamping plate (7), and the fixing strip (15) is fixedly provided on the side of the L-shaped clamping plate (7) away from the electric push rod (8), and the fixing strip (15) is fixedly provided on the one side of the L-shaped clamping plate (7). A plurality of first springs (16) are fixed to the bottom of the fixed bar (15) and the top of the trapezoidal plate (17). The first springs (16) are used to move the trapezoidal plate (17) upward and reset when the trapezoidal plate (17) loses external force factors. The ends of the plurality of rotating shafts (12) away from the plug column (13) are all rotatably connected to the first connecting rod (18). The top ends of the plurality of first connecting rods (18) are all rotatably connected to the bottom of the trapezoidal plate (17) through hinge shafts. When the trapezoidal plate (17) moves downward, the plurality of rotating shafts (12) are moved outward through the first connecting rod (18); The inner walls of the galvanizing box (23) on both sides away from each other are slidably connected with a pressure plate (24), the bottom ends of the two pressure plates (24) respectively touch the bottom ends of the two arc-shaped plates (25), the bottom fixed block of the pressure plate (24) is used to limit the bottom end of the arc-shaped plate (25), the top of the arc-shaped plate (25) cooperates with the inclined surface and the top of the trapezoidal plate (17) to drive the trapezoidal plate (17) to move downward, and the galvanizing box (23) is away from each other. The two sides of the arc plate (25) are slidably connected with a load-bearing block (26), and the arc plate (25) passes through the load-bearing block (26). The inner wall of the side of the load-bearing block (26) away from each other is provided with a track groove (27). The same pin (28) is slidably matched between the two track grooves (27), and the pin (28) is fixedly passed through the arc plate (25). The cooperation between the load-bearing block (26) and the arc plate (25) is used to reset the arc plate (25) when the pressure is lost; The rotating structure comprises a first rack (20) slidably arranged on a side of the L-shaped clamping plate (7) away from the electric push rod (8); the outer walls of the plurality of rotating shafts (12) are all fixedly sleeved with a first gear (19), and the first gear (19) is meshed with the first rack (20); a moving frame (21) is fixedly arranged on one side of the top of the first rack (20), and the moving frame (21) is slidably connected to one side of the L-shaped clamping plate (7); short racks are fixedly arranged on the top inner wall and the bottom inner wall of the moving frame (21); one side of the L-shaped clamping plate (7) is rotatably connected to a residual gear (22) located in the moving frame (21), and the residual gear (22) is intermittently meshed with two short racks; The cleaning structure comprises a rotating rod (32) rotating in the cleaning box (29), and the rotating rod (32) is located below the nozzle (31); a plurality of arc-shaped convex strips (57) are fixed to the outer wall of the rotating rod (32), and the arc-shaped convex strips (57) cooperate with the L-shaped clamping plate (7) to drive the L-shaped clamping plate (7) to vibrate up and down; the rotating rod (32) and one end of the two air pipes (30) are both rotated to extend to one side of the cleaning box (29) and are connected through a sprocket and a chain transmission; the outer wall of one of the air pipes (30) is fixedly sleeved with two second gears (34), and the two second gears (34) are located on both sides of the plurality of nozzles (31); the outer wall of the air pipe (30) is sleeved with two first torsion springs (36), and the ends of the two first torsion springs (36) close to each other are respectively connected to the ends of the corresponding second gears (34). One side is fixedly connected, and the ends of the two first torsion springs (36) that are away from each other are respectively fixedly connected to the inner wall of one side of the cleaning box (29), and the first torsion spring (36) is used to drive the air pipe (30) to reset and rotate. One side of the cleaning box (29) is slidably penetrated by two second racks (35), and the second racks (35) are meshed with corresponding second gears (34) to drive the air pipe (30) to reciprocate, and the second racks (35) are matched with the moving frame (21), and the moving frame (21) is used to drive the second racks (35) to move, and the inner walls of the two sides of the galvanized box (23) that are away from each other are fixed with a plurality of neodymium magnets (33), and the bottom of the trapezoidal plate (17) is fixedly embedded with an iron layer, and a magnetic attraction force is generated between the iron layer and the neodymium magnet (33), which is used to drive the trapezoidal plate (17) to move downward to separate the plurality of pipe fittings; The top of the frame (1) is rotatably connected to a screw rod (2) via a base, the outer wall of the screw rod (2) is threadedly sleeved with a moving block (3), and the moving block (3) is slidably arranged on the top of the frame (1), the bottom of the moving block (3) is fixed with a multi-stage cylinder (4), the output shaft end of the multi-stage cylinder (4) is fixed with a cylinder (37), a slide plate (38) is slidably connected inside the cylinder (37), a plurality of third springs (39) are fixed between the top of the slide plate (38) and the inner wall of the top of the cylinder (37), a limiting ring (41) located below the slide plate (38) is fixed on the inner wall of the cylinder (37) for limiting the position of the slide plate (38), a plurality of connecting blocks (40) are fixed to the bottom of the slide plate (38), and the connecting blocks (40) are fixed to the top of the main board (5), and the cooperation between the slide plate (38) and the third spring (39) is used to play a role of giving way when the main board (5) vibrates up and down.

2. The hot-dip galvanizing equipment for pipe processing according to claim 1, characterized in that: A conical platform (14) is fixed on one side of the plug post (13) close to the electric push rod (8) for guiding the plug post (13) to be inserted into the pipe fitting. The outer diameter of the plug post (13) matches the inner diameter of the pipe fitting. Two limit strips (9) are fixed on the bottom of the main board (5) for limiting the L-shaped clamping plate (7).

3. The hot-dip galvanizing equipment for pipe processing according to claim 2, characterized in that: The length of the plurality of movable grooves (10) located in the middle is shorter than the length of the plurality of movable grooves (10) located on both sides, so that two adjacent pipes can be separated when the plurality of rotating shafts (12) move away from each other in a later stage.

4. The hot-dip galvanizing equipment for pipe processing according to claim 3, characterized in that: The inner walls of the galvanizing box (23) on both sides away from each other are fixed with a material guide inclined plate (42) located below the pressure plate (24), and the bottom of the material guide inclined plate (42) is fixedly connected to the bottom inner wall of the galvanizing box (23), and the bottom inner wall of the galvanizing box (23) is fixed with a V-shaped plate (43), and the galvanizing box (23) has two rotating shafts (52) that are sealed and rotated transversely, and one end of the rotating shaft (52) is sealed and rotated through the material guide inclined plate (42) and the V-shaped plate (43), and the outer walls of the two rotating shafts (52) are fixed with a plurality of knocking rods (53), and the plurality of knocking rods (53) are respectively used to knock the material guide inclined plate (42) and the V-shaped plate (43) to shake off the zinc slag on the material guide inclined plate (42) and the V-shaped plate (43), and the outer wall of the rotating shaft (52) Two second torsion springs (54) are sleeved and the two second torsion springs (54) are respectively located at two sides below the material guiding inclined plate (42). The ends of the two second torsion springs (54) that are close to each other are fixedly connected to the outer wall of the rotating shaft (52), and the ends of the two second torsion springs (54) that are far away from each other are respectively fixedly connected to the inner walls of both sides of the galvanizing box (23) for driving the rotating shaft (52) to reset and rotate. The two ends of the rotating shaft (52) extend to the two sides of the galvanizing box (23) and are fixed with winding wheels (55). The outer walls of the two winding wheels (55) are wound with steel wire ropes (56). The top ends of the steel wire ropes (56) are fixedly connected to the bottoms of the adjacent bearing blocks (26). The arc plate (25) drives the rotating shaft (52) to rotate through the bearing blocks (26).

5. The hot-dip galvanizing equipment for pipe processing according to claim 4, characterized in that: A material guide slot is formed between the V-shaped plate (43) and the two material guide inclined plates (42). A plurality of U-shaped tubes (44) are fixedly passed through the bottom of the galvanizing box (23). The two ends of the U-shaped tubes (44) respectively cooperate with the two material guide slots to discharge the zinc slag that has been shaken off into the U-shaped tubes (44). A conveying roller (45) is rotatably connected inside the U-shaped tube (44). A discharge pipe (46) is fixed to one side of the U-shaped tube (44). A valve is provided on the outer wall of the discharge pipe (46). The conveying roller (45) cooperates with the discharge pipe (46) to discharge the zinc slag. Two closing plates (49) for closing two ports of the U-shaped tube (44) are slidably connected to the inner wall of the bottom of the galvanizing box (23). The two closing plates (49) ) are sealed and slidably penetrated through the V-shaped plate (43) at one end away from each other; a plurality of tension springs (51) are fixed on the side where the two closing plates (49) are close to each other, for resetting the two closing plates (49); a pressure rod (47) is sealed and slidably penetrated inside the V-shaped plate (43); the top end of the pressure rod (47) cooperates with the bottom of the main plate (5); a mounting plate (48) is fixed to the bottom end of the pressure rod (47); a plurality of second connecting rods (50) are rotatably connected to one side of the top of the two closing plates (49); the top ends of the plurality of second connecting rods (50) are rotatably connected to the bottom of the mounting plate (48); the pressure rod (47) moves downward to push the two closing plates (49) to move to both sides to close the two ports of the U-shaped tube (44).

6. A hot-dip galvanizing process for processing pipe fittings using the hot-dip galvanizing equipment for processing pipe fittings according to claim 5, characterized in that: The following steps are involved: S1. Degreasing: Through the shot blasting machine, the gray skin and core sand on the inner and outer surfaces of the pipe are completely removed; S2. Pickling: Immerse the pipe fittings in a pickling tank to remove the oxide scale and rust on the surface. Pickle for 2 minutes. The pickling solution is a hydrochloric acid solution with a concentration of 15%-20%. The pipe fittings must be heated before pickling, and the water temperature cannot be lower than 80°C. After pickling, use clean water to clean the acid on the surface; S3, dipping in plating agent: immerse the pipe fittings in a plating agent tank. The plating agent is an aqueous solution of ammonium chloride and zinc chloride. The ratio of zinc chloride to ammonium chloride is strictly controlled at 1:0.8, and the pH value is between 5-6. This further cleans the surface of the pipe fittings and promotes the bonding of the zinc layer and the substrate. After the plating agent is immersed, it is dried; S4. Hot-dip galvanizing: Multiple pipes are clamped at the same time by hot-dip galvanizing equipment, and the dried pipes are immersed in molten zinc liquid for a certain period of time to allow the zinc liquid to react with the pipe matrix to form a zinc-iron alloy layer. When the pipes are immersed in the galvanizing liquid, multiple pipes are moved outward to avoid contact between two adjacent pipes. During the hot-dip galvanizing process, the temperature of the zinc liquid needs to be controlled between 630℃-635℃; S5. Removal: When hot-dip galvanizing is carried out through hot-dip galvanizing equipment, the zinc slag at the bottom of the galvanizing liquid can be pushed to both sides, which is convenient for removing the zinc slag later; S6. Cleaning: After hot-dip galvanizing, high-pressure gas is introduced into the hot-dip galvanizing equipment to purge the outer wall of the pipe fittings. During the purge, the pipe fittings can be driven to vibrate, and the excess zinc liquid and zinc nodules are completely removed to make the coating more uniform. S7, cooling: cooling the hot-dip galvanized pipes naturally; S8, passivation: passivation treatment of the coating is performed by passivation solution; S9, Rinse: Rinse the passivated pipes with clean water to remove the residual passivation liquid.

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