Elbow pipe wall carbon steel rust-proof treatment equipment and treatment method

Abstract

The invention discloses bend pipe wall carbon steel anti-rust treatment equipment and method, and relates to the technical field of bend pipe machining treatment.The bend pipe wall carbon steel anti-rust treatment equipment comprises a three-axis driving mechanism built beside a zinc liquid pool, a workpiece frame is installed above the zinc liquid pool and used for containing a carbon steel bend pipe, and a plurality of grid holes are evenly formed in the peripheral side of the workpiece frame; through the arrangement of the movable switching structure, the vibration motor and the disturbance assembly, bubbles possibly existing in the carbon steel pipe fitting are discharged under the vibration effect and the disturbance effect, the bubbles are eliminated, the bent part in the carbon steel bent pipe makes contact with zinc liquid more evenly, the carbon steel bent pipe fitting is more stable, and the zinc liquid in the carbon steel bent pipe fitting is more stable. Meanwhile, a zinc-iron alloy layer formed by zinc liquid attached to the carbon steel bent pipe can be more uniform; in addition, when the carbon steel pipe fitting is disturbed, the contact dead angle of the carbon steel pipe fitting and the workpiece frame can be eliminated, galvanizing operation is completed at a time, the defect rate of finished products is reduced, and compared with the prior art, the quality of the treated carbon steel bent pipe finished products is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe bending processing, and in particular to a device and method for rust prevention of carbon steel for the wall of a pipe bending. Background Art

[0002] Carbon steel is a common metal material. It is widely used in machinery, construction, automobiles and other fields due to its affordable price, high strength and wear resistance. However, carbon steel is prone to rust in a humid environment, which affects its service life and appearance. Therefore, it is particularly important to carry out rust prevention treatment on carbon steel.

[0003] At present, the main rust prevention methods for carbon steel include chemical rust prevention, physical rust prevention and coating rust prevention. Among them, the physical rust prevention method is to achieve the purpose of rust prevention by changing the physical properties of the carbon steel surface; the commonly used physical rust prevention methods include electroplating, electrophoresis, hot-dip galvanizing, etc.; among them, hot-dip galvanizing is a commonly used rust prevention method. Its principle is to immerse the steel surface in molten zinc to form a layer of zinc-iron alloy protective film to achieve the effect of rust prevention. The physical rust prevention method has the advantages of good rust prevention effect and long service life.

[0004] In the prior art, the hot-dip galvanizing process usually involves directly immersing the workpiece to be processed (such as profiles, pipes) into zinc liquid after pretreatment, and taking out the profiles after a certain period of reaction to obtain a finished product. Since it is difficult to ensure the posture of the bent pipe when it is placed in the zinc liquid (whether it is rope hoisting or frame placement, it cannot ensure that the bend is completely exhausted when it is placed, and the posture of the workpiece (i.e., the bent pipe) is not adjusted when placed in most processes), it is easy to form internal bubbles at the bend when it is placed, and the equipment is mostly stationary during immersion galvanizing, making it difficult to eliminate the internal bubbles, ultimately making the internal galvanizing of the bent pipe not comprehensive enough and poorly uniform, forming a zinc-iron alloy layer of varying thickness, affecting the quality of the finished product and reducing the qualified rate of the finished product. Therefore, a carbon steel anti-rust treatment device and treatment method for the wall of the bent pipe are needed. Summary of the invention

[0005] The purpose of the present application is to provide a device and method for treating carbon steel rust in a curved pipe wall, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a device for treating carbon steel rust in a bent pipe wall, comprising a three-axis driving mechanism built beside a zinc liquid pool, a workpiece frame installed above the zinc liquid pool, the workpiece frame is used to place the carbon steel bent pipe, a plurality of grid holes are evenly opened on the periphery of the workpiece frame, and the bottom surface of the workpiece frame adopts a grid bottom;

[0007] The upper end of the workpiece frame is connected to the movable end of the three-axis driving mechanism through a movable transfer structure, and the connecting part of the movable transfer structure and the workpiece frame can be displaced and moved with the movable end of the three-axis driving mechanism in the horizontal direction;

[0008] A vibration motor is fixed at the lower end of the movable transfer structure, and a disturbance component is installed at the lower end of the workpiece frame, which moves with the workpiece frame after it is immersed in the bottom of the zinc liquid pool and disturbs the carbon steel bent pipe.

[0009] As a further supplement to this solution, the activity transfer structure includes:

[0010] A fixed plate, the fixed plate being fixed to the lower end of the movable end of the three-axis driving mechanism;

[0011] A movable disk, the movable disk is movably connected to the fixed disk through an elastic connection structure, the movable disk and the fixed disk are coaxially arranged, and the movable direction of the movable disk is horizontal sliding along the radial direction of the fixed disk;

[0012] A fixed rod, the upper end of which is fixed to the lower end of the movable plate, and the lower end of which is fixed to the upper end of the workpiece frame;

[0013] There are multiple fixed rods and they are distributed along the circumference of the lower end of the movable plate, and the vibration motor is located between the upper ends of the multiple fixed rods.

[0014] As a further supplement to this solution, a first slide groove is provided at the lower end of the fixed plate, and a second slide groove is provided at the upper end of the movable plate, and the extension direction of the second slide groove is consistent with the extension direction of the first slide groove;

[0015] The elastic connection structure includes a sliding link and a first return spring, the upper and lower ends of the sliding link extend into the first slide groove and the second slide groove respectively, the upper end of the sliding link is integrally formed with a first limiting slider, and the lower end of the sliding link is integrally formed with a second limiting slider, and the first limiting slider and the second limiting slider are respectively adapted to the first slide groove and the second slide groove;

[0016] Two first return springs are provided and are respectively fixed to opposite sides of the sliding connecting rod, and ends of the two first return springs away from the sliding connecting rod are respectively fixed to the inner side wall of the first sliding groove and the inner side wall of the second sliding groove;

[0017] Wherein, the first sliding groove and the second sliding groove are both T-shaped grooves, and the openings of the first sliding groove and the second sliding groove are arranged opposite to each other.

[0018] As a further supplement to this solution, the diameter of the movable disk is greater than the diameter of the fixed disk, and the length of the second slide groove is greater than the length of the first slide groove;

[0019] There are multiple groups of first sliding grooves, second sliding grooves, sliding connecting rods and first return springs, and the multiple first sliding grooves, second sliding grooves, sliding connecting rods and first return springs are distributed in a circular array along the axis of the fixed disk.

[0020] As a further complement to this solution, the perturbation components include:

[0021] A movable plate, the movable plate is located below the workpiece frame;

[0022] A connecting rod, the lower end of which is fixed to the upper surface of the movable plate, and the upper end of which is elastically connected to the workpiece frame through an elastic member;

[0023] A plurality of jacking columns are provided and evenly distributed on the movable plate, and the plurality of jacking columns can penetrate the mesh holes at the bottom of the grid;

[0024] When the bottom surface of the movable plate contacts the bottom of the zinc liquid pool and the workpiece frame continues to descend, the jacking column passes through the mesh holes at the bottom of the grid and jacks the carbon steel bent pipe in the workpiece frame.

[0025] As a further supplement to this solution, a mounting cavity with an opening facing downward is provided at the corner of the workpiece frame;

[0026] The elastic member comprises a second return spring, the upper end of which is fixed to the top wall in the installation cavity, the lower end of which is fixed to the upper end of the connecting rod, and the upper end of the connecting rod is slidably connected to the installation cavity.

[0027] As a further supplement to this solution, the jacking column includes:

[0028] A fixed top column, the lower end of which is fixed to the upper surface of the movable plate, the upper end of which is provided with a sliding cavity, the opening diameter of which is smaller than the diameter of the sliding cavity and the opening is arranged upward;

[0029] A movable jack, which is located above the fixed jack column, has a sliding rod integrally formed at the lower end of the movable jack, and the lower end of the sliding rod slides through the sliding cavity;

[0030] A third return spring, wherein the upper and lower ends of the third return spring are respectively fixed to the lower end of the slide rod and the bottom wall of the slide cavity;

[0031] Wherein, the upper end of the movable top head forms a hemispherical end head.

[0032] As a further supplement to this solution, the three-axis drive mechanism includes an X-axis slide rail, a Y-axis guide rail and a Z-axis slide rail, the Y-axis guide rail is slidably mounted on the X-axis slide rail, and the Z-axis slide rail is slidably mounted on the Y-axis guide rail;

[0033] The movable end of the three-axis driving mechanism comprises a sliding seat, which is slidably mounted on the lower end of the Z-axis slide rail, and the upper end of the movable disk is fixed to the lower end of the sliding seat.

[0034] The present application also provides a method for rust prevention of carbon steel on the wall of a bent pipe, which is applied to the above-mentioned device for rust prevention of carbon steel on the wall of a bent pipe, and comprises the following steps:

[0035] Step 1: Preparation: Heat the zinc liquid in the zinc liquid pool to a predetermined temperature, and place the pre-treated carbon steel bent pipe into the workpiece frame;

[0036] Step 2: Start hot-dip galvanizing. The workpiece frame is sunk into the zinc liquid in the zinc liquid pool by controlling the operation of the three-axis driving mechanism, and the temperature of the zinc liquid is maintained to perform hot-dip galvanizing on the carbon steel elbow.

[0037] Step 3: Hot-dip galvanizing deep treatment: start the vibration motor and control the three-axis drive mechanism to drive the workpiece frame to reciprocate and lift, and cooperate with the disturbance component to vibrate and disturb the carbon steel pipe fittings;

[0038] Step 4: Hot dip galvanizing completed

[0039] As a further supplement to this solution, in step 3, the disturbance component below the workpiece frame repeatedly contacts the bottom of the zinc liquid pool, thereby disturbing the carbon steel pipe fittings in the workpiece frame and changing the posture of the carbon steel pipe fittings;

[0040] The vibration motor generates an exciting force and causes the workpiece frame to vibrate. When the workpiece frame vibrates, it drives the carbon steel pipe fittings to vibrate synchronously, so that the bubbles that may exist in the carbon steel pipe fittings are discharged under the vibration and disturbance, and the bubbles are eliminated, so that the bending part in the carbon steel elbow pipe is in contact with the zinc liquid more evenly, and at the same time, the zinc-iron alloy layer formed by the zinc liquid attached to the carbon steel elbow pipe can be more evenly formed;

[0041] In addition, when the carbon steel pipe fittings are disturbed, the contact dead angle between the carbon steel pipe fittings and the workpiece frame can be eliminated, so that the galvanizing operation can be completed in one time and the defect rate of the finished product can be reduced.

[0042] In summary, the technical effects and advantages of the present invention are as follows:

[0043] 1. In the present invention, through the arrangement of the movable switching structure, the vibration motor and the disturbance component, when the carbon steel bent pipe is subjected to hot-dip galvanizing treatment, the staff first heats the zinc liquid in the zinc liquid pool to a predetermined temperature, and puts the pre-treated carbon steel bent pipe into the workpiece frame; then, the workpiece frame is sunk into the zinc liquid in the zinc liquid pool by controlling the operation of the three-axis driving mechanism, and the temperature of the zinc liquid is maintained to perform hot-dip galvanizing on the carbon steel bent pipe; at the same time, the vibration motor is started and the three-axis driving mechanism is controlled to drive the workpiece frame to reciprocate and rise and fall, and the disturbance component is used to vibrate and disturb the carbon steel pipe fittings, so that the bubbles that may exist in the carbon steel pipe fittings are discharged under the vibration and disturbance, and the bubbles are eliminated, so that the bending part in the carbon steel bent pipe is in contact with the zinc liquid more evenly, and at the same time, the zinc-iron alloy layer formed by the zinc liquid attached to the carbon steel bent pipe can be made more uniform;

[0044] In addition, when the carbon steel pipe fittings are disturbed, the contact dead angle between the carbon steel pipe fittings and the workpiece frame can be eliminated, so that the galvanizing operation can be completed in one time, reducing the defect rate of the finished product. Compared with the existing technology, the quality of the processed carbon steel bent pipe products is greatly improved.

[0045] 2. In the present invention, by setting the jacking column, after the movable plate abuts against the bottom of the zinc liquid pool, when the workpiece frame continues to descend, the movable jack first passes through the mesh holes at the bottom of the grid and contacts the carbon steel bent pipe. At this time, the pressure of the carbon steel bent pipe causes the movable jack to press down and compress the third reset spring, so that the movable jack is not in a hard collision when contacting the carbon steel bent pipe, thereby avoiding damage to the pipe wall of the carbon steel bent pipe by the movable jack and ensuring that the zinc-iron alloy formed on the surface of the carbon steel bent pipe is intact. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 It is a schematic diagram of the three-dimensional structure of the rust prevention treatment equipment in the embodiment;

[0048] Figure 2 It is a schematic structural diagram of the workpiece frame, the movable transfer structure and the movable plate from a first perspective in the embodiment;

[0049] Figure 3 A schematic diagram of the workpiece frame, the movable transfer structure and the movable plate in the embodiment from a second viewing angle;

[0050] Figure 4 A cross-sectional view of the movable switching structure in the embodiment;

[0051] Figure 5 It is a partial cross-sectional view of the workpiece frame in the embodiment;

[0052] Figure 6 is a schematic diagram of the cross-sectional structure of the jacking column in the embodiment;

[0053] Figure 7 Schematic diagram of the structure of the three-axis driving mechanism in the embodiment.

[0054] In the figure: 1. zinc liquid pool; 2. three-axis driving mechanism; 21. X-axis slide rail; 22. Y-axis guide rail; 23. Z-axis slide rail; 24. sliding seat; 3. workpiece frame; 31. grid hole; 32. grid bottom; 33. installation cavity; 4. movable transfer structure; 41. fixed plate; 411. first slide groove; 42. movable plate; 421. second slide groove; 43. fixed rod; 44. sliding connecting rod; 441. first limit slider; 442. second limit slider; 45. first return spring; 5. movable plate; 51. connecting rod; 52. jacking column; 521. fixed top column; 522. movable top head; 523. sliding rod; 524. third return spring; 525. sliding cavity; 53. second return spring; 6. vibration motor. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Example:

[0057] refer to Figure 1-Figure 7 The device for treating the carbon steel rust of the pipe wall of a bent pipe shown in the figure comprises a three-axis driving mechanism 2 built beside a zinc liquid pool 1, a workpiece frame 3 is installed above the zinc liquid pool 1, the workpiece frame 3 is used to place the carbon steel bent pipe, a plurality of grid holes 31 are evenly opened on the side of the workpiece frame 3, and the bottom surface of the workpiece frame 3 adopts a grid bottom 32;

[0058] The upper end of the workpiece frame 3 is connected to the movable end of the three-axis driving mechanism 2 through the movable transfer structure 4, and the connection part between the movable transfer structure 4 and the workpiece frame 3 can be displaced and moved with the movable end of the three-axis driving mechanism 2 in the horizontal direction;

[0059] A vibration motor 6 is fixed at the lower end of the movable switching structure 4, and a disturbance component is installed at the lower end of the workpiece frame 3, which moves with the workpiece frame 3 after being immersed in the bottom of the zinc liquid pool 1 and disturbs the carbon steel bent pipe.

[0060] Based on the above structure, when hot-dip galvanizing the carbon steel bent pipe, the staff first heats the zinc liquid in the zinc liquid pool 1 to a predetermined temperature, and puts the pre-treated carbon steel bent pipe into the workpiece frame 3; then, the workpiece frame 3 is sunk into the zinc liquid in the zinc liquid pool 1 by controlling the operation of the three-axis driving mechanism 2, and the temperature of the zinc liquid is maintained to hot-dip galvanize the carbon steel bent pipe; at the same time, the vibration motor 6 is started and the three-axis driving mechanism 2 is controlled to drive the workpiece frame 3 to reciprocate and rise and fall, and the disturbance component is used to vibrate and disturb the carbon steel pipe fittings;

[0061] Specifically, the disturbance component below the workpiece frame 3 repeatedly contacts the bottom of the zinc liquid pool 1, thereby disturbing the carbon steel pipe fittings in the workpiece frame 3 and changing the posture of the carbon steel pipe fittings; the vibration motor 6 generates an exciting force and causes the workpiece frame 3 to vibrate, and the workpiece frame 3 drives the carbon steel pipe fittings to vibrate synchronously when vibrating, so that bubbles that may exist in the carbon steel pipe fittings are discharged under the vibration and disturbance effects, and the bubbles are eliminated, so that the bending part in the carbon steel elbow pipe is in contact with the zinc liquid more evenly, and at the same time, the zinc-iron alloy layer formed by the zinc liquid attached to the carbon steel elbow pipe can be made more uniform;

[0062] In addition, when the carbon steel pipe fittings are disturbed, the contact dead angle between the carbon steel pipe fittings and the workpiece frame 3 can be eliminated, so that the galvanizing operation can be completed in one time, reducing the defect rate of the finished product. Compared with the existing technology, the quality of the processed carbon steel bent pipe products is greatly improved.

[0063] Furthermore, the active switching structure 4 includes:

[0064] A fixed plate 41, the fixed plate 41 is fixed to the lower end of the movable end of the three-axis driving mechanism 2, and a first sliding groove 411 is formed at the lower end of the fixed plate 41;

[0065] The movable disk 42 is movably connected to the fixed disk 41 through an elastic connection structure. The movable disk 42 is coaxially arranged with the fixed disk 41. The movable direction of the movable disk 42 is horizontal sliding along the radial direction of the fixed disk 41. A second slide groove 421 is provided at the upper end of the movable disk 42. The extension direction of the second slide groove 421 is consistent with the extension direction of the first slide groove 411.

[0066] The elastic connection structure includes a sliding link 44 and a first return spring 45. The upper and lower ends of the sliding link 44 extend into the first slide groove 411 and the second slide groove 421 respectively. The upper end of the sliding link 44 is integrally formed with a first limiting slider 441, and the lower end of the sliding link 44 is integrally formed with a second limiting slider 442. The first limiting slider 441 and the second limiting slider 442 are respectively adapted to the first slide groove 411 and the second slide groove 421.

[0067] Two first return springs 45 are provided and are respectively fixed to opposite sides of the sliding link 44, and one end of the two first return springs 45 away from the sliding link 44 is respectively fixed to the inner side wall of the first sliding groove 411 and the inner side wall of the second sliding groove 421;

[0068] The first slide groove 411 and the second slide groove 421 are both T-shaped grooves, and the openings of the first slide groove 411 and the second slide groove 421 are arranged opposite to each other;

[0069] A fixed rod 43, the upper end of the fixed rod 43 is fixed to the lower end of the movable plate 42, and the lower end of the fixed rod 43 is fixed to the upper end of the workpiece frame 3;

[0070] There are multiple fixed rods 43 distributed along the circumference of the lower end of the movable plate 42 , and the vibration motor 6 is located between the upper ends of the multiple fixed rods 43 .

[0071] When the vibration motor 6 is started, the vibration motor 6 generates an exciting force and drives the movable disk 42 to vibrate synchronously. Since the movable disk 42 and the fixed disk 41 are elastically slidably connected, the movable disk 42 makes a horizontal movement along the first slide groove 411 and the second slide groove 421 on the horizontal plane when vibrating. During this process, the sliding connecting rod 44 always stably connects the fixed disk 41 and the movable disk 42, and the first return spring 45 is repeatedly compressed and released under the action of the vibration force, so that the movable disk 42 can vibrate back and forth in the horizontal direction; and the fixed rod 43 drives the workpiece frame 3 to vibrate, so that the carbon steel pipe fittings placed in the workpiece frame 3 also vibrate, thereby achieving the effect of removing bubbles in the carbon steel bent pipe.

[0072] Furthermore, the diameter of the movable plate 42 is greater than the diameter of the fixed plate 41, and the length of the second slide groove 421 is greater than the length of the first slide groove 411;

[0073] There are multiple groups of first slide grooves 411, second slide grooves 421, sliding links 44 and first return springs 45, and multiple first slide grooves 411, second slide grooves 421, sliding links 44 and first return springs 45 are distributed in a circular array along the axis of the fixed disk 41; thereby, the movable disk 42 can vibrate in multiple directions on a horizontal plane, which is more beneficial for eliminating bubbles in the carbon steel bent pipe.

[0074] Furthermore, a mounting cavity 33 opening downward is provided at the corner of the workpiece frame 3, and the disturbance assembly includes a movable plate 5, a connecting rod 51 and a push column 52;

[0075] The movable plate 5 is located below the workpiece frame 3, the lower end of the connecting rod 51 is fixed to the upper surface of the movable plate 5, and the upper end of the connecting rod 51 is elastically connected to the workpiece frame 3 through an elastic member;

[0076] The elastic member includes a second return spring 53, the upper end of the second return spring 53 is fixed to the top wall of the installation cavity 33, the lower end of the second return spring 53 is fixed to the upper end of the connecting rod 51, and the upper end of the connecting rod 51 is slidably connected to the installation cavity 33;

[0077] There are multiple push-up columns 52 evenly distributed on the movable plate 5, and the multiple push-up columns 52 can all penetrate the meshes of the grid bottom 32;

[0078] When the bottom surface of the movable plate 5 contacts the bottom of the zinc liquid pool 1 and the workpiece frame 3 continues to descend, the pushing column 52 passes through the mesh of the grid bottom 32 and pushes the carbon steel bent pipe in the workpiece frame 3 .

[0079] By setting the movable plate 5, the connecting rod 51 and the pushing column 52, when the workpiece frame 3 moves downward, the movable plate 5 first contacts the bottom of the zinc liquid pool 1, and then the workpiece frame 3 continues to descend, so that the second return spring 53 is compressed, and the pushing column 52 passes through the mesh of the grid bottom 32 and pushes the carbon steel bent pipe in the workpiece frame 3, so that the carbon steel bent pipe undergoes a certain posture change, and at the same time, the portion of the carbon steel bent pipe that originally contacts the grid bottom 32 of the workpiece frame 3 is separated from the grid bottom 32 and fully contacts the zinc liquid; this is conducive to disturbing the carbon steel bent pipe, and cooperates with the movable switching structure 4 to achieve the purpose of quickly eliminating bubbles in the carbon steel bent pipe, and at the same time, it can also enable all parts of the inner and outer pipe walls of the carbon steel bent pipe to fully contact and react with the zinc liquid during the disturbance process, ensuring that the formed zinc-iron alloy is fully covered and has a uniform thickness under the action of vibration, which greatly improves the quality of the finished carbon steel bent pipe after treatment.

[0080] Further, the jacking column 52 includes:

[0081] A fixed top column 521, the lower end of which is fixed to the upper surface of the movable plate 5, and the upper end of which is provided with a sliding cavity 525, the opening diameter of which is smaller than the diameter of the sliding cavity 525 and the opening is arranged upward;

[0082] A movable jack 522 is located above the fixed jack 521. A slide bar 523 is integrally formed at the lower end of the movable jack 522. The lower end of the slide bar 523 slides through the slide cavity 525.

[0083] A third return spring 524, wherein the upper and lower ends of the third return spring 524 are respectively fixed to the lower end of the slide rod 523 and the inner bottom wall of the slide cavity 525;

[0084] The upper end of the movable top head 522 forms a hemispherical end.

[0085] After the movable plate 5 abuts against the bottom of the zinc liquid pool 1, when the workpiece frame 3 continues to descend, the movable top head 522 first passes through the mesh holes of the grid bottom 32 and contacts the carbon steel bent pipe. At this time, the pressure of the carbon steel bent pipe causes the movable top head 522 to press down and compress the third return spring 524, so that the movable top head 522 does not cause a hard collision when contacting the carbon steel bent pipe, thereby avoiding the movable top head 522 from causing damage to the pipe wall of the carbon steel bent pipe and ensuring that the zinc-iron alloy formed on the surface of the carbon steel bent pipe is intact.

[0086] Further, the three-axis driving mechanism 2 includes an X-axis slide rail 21, a Y-axis guide rail 22 and a Z-axis slide rail 23, the Y-axis guide rail 22 is slidably mounted on the X-axis slide rail 21, and the Z-axis slide rail 23 is slidably mounted on the Y-axis guide rail 22;

[0087] The movable end of the three-axis driving mechanism 2 includes a sliding seat 24, which is slidably mounted on the lower end of the Z-axis slide rail 23, and the upper end of the movable plate 42 is fixed to the lower end of the sliding seat 24;

[0088] The three-axis driving mechanism 2 also includes a driving member for driving the Y-axis guide rail 22 to slide along the X-axis slide rail 21, driving the Z-axis slide rail 23 to slide along the Y-axis guide rail 22, and driving the sliding seat 24 to slide along the Z-axis slide rail 23. Figure 1 and Figure 7 It can be known that the driving member includes a motor, a lead screw or other commonly used driving structures, and it is best to be able to drive the above structure to move.

[0089] A method for anti-rust treatment of carbon steel on the wall of a bent pipe, which is applied to an anti-rust treatment device for carbon steel on the wall of a bent pipe, comprises the following steps:

[0090] Step 1: Preparation: Heat the zinc liquid in the zinc liquid pool 1 to a predetermined temperature, and place the pre-treated carbon steel bent pipe into the workpiece frame 3. The staff can use a variety of loading methods such as manual loading and mechanical loading according to actual use requirements;

[0091] Step 2: hot-dip galvanizing is started. The workpiece frame 3 is sunk into the zinc liquid in the zinc liquid pool 1 by controlling the operation of the three-axis driving mechanism 2, and the temperature of the zinc liquid is maintained to perform hot-dip galvanizing on the carbon steel elbow.

[0092] Step 3: Hot-dip galvanizing deep treatment: start the vibration motor 6 and control the three-axis drive mechanism 2 to drive the workpiece frame 3 to reciprocate and lift, and cooperate with the disturbance component to vibrate and disturb the carbon steel pipe fittings;

[0093] The disturbance component below the workpiece frame 3 repeatedly contacts the bottom of the zinc liquid pool 1, thereby disturbing the carbon steel pipe fittings in the workpiece frame 3 and changing the posture of the carbon steel pipe fittings;

[0094] The vibration motor 6 generates an exciting force and causes the workpiece frame 3 to vibrate. When the workpiece frame 3 vibrates, it drives the carbon steel pipe fitting to vibrate synchronously, so that bubbles that may exist in the carbon steel pipe fitting are discharged under the vibration and disturbance, and the bubbles are eliminated, so that the bending part in the carbon steel elbow pipe is in contact with the zinc liquid more evenly, and at the same time, the zinc-iron alloy layer formed by the zinc liquid attached to the carbon steel elbow pipe can be made more uniform;

[0095] In addition, when the carbon steel pipe is disturbed, the contact dead angle between the carbon steel pipe and the workpiece frame 3 can be eliminated, so that the galvanizing operation can be completed in one time, reducing the defect rate of the finished product;

[0096] Step 4: After hot-dip galvanizing is completed, the three-axis drive mechanism 2 is controlled to start and the workpiece frame 3 is raised to take out the finished carbon steel bent pipe product.

[0097] It should be noted that step one of the pretreatment of carbon steel bent pipes includes: rust removal - cleaning - pickling - cleaning - coating with additives and other pretreatment process steps commonly used in the prior art. The specific process steps of the pretreatment are well known to those skilled in the art and will not be repeated here.

[0098] It should be further explained that in the initial stage of immersing the carbon steel bent pipe in zinc liquid, the lifting movement of the three-axis drive mechanism 2 can be controlled to be frequent movement, and the vibration motor 6 is continuously turned on, so as to quickly eliminate the bubbles in the carbon steel bent pipe. After the bubbles are eliminated, the lifting movement of the three-axis drive mechanism 2 or the opening and closing of the vibration motor 6 can be changed to intermittent, so as to ensure that a uniform zinc-iron alloy protective layer can be formed on the surface of the carbon steel bent pipe, thereby ensuring the quality of the finished product.

[0099] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for treating carbon steel for rust prevention of curved pipe walls, comprising a three-axis drive mechanism (2) constructed beside a zinc liquid pool (1), characterized in that: A workpiece frame (3) is installed above the zinc liquid pool (1), and the workpiece frame (3) is used to place the carbon steel bent pipe. A plurality of grid holes (31) are evenly opened on the circumference of the workpiece frame (3), and the bottom surface of the workpiece frame (3) adopts a grid bottom (32); The upper end of the workpiece frame (3) is connected to the movable end of the three-axis drive mechanism (2) via a movable switching structure (4); the connecting portion of the movable switching structure (4) and the workpiece frame (3) can be displaced and moved with respect to the movable end of the three-axis drive mechanism (2) in the horizontal direction; A vibration motor (6) is fixed at the lower end of the movable switching structure (4), and a disturbance component is installed at the lower end of the workpiece frame (3) for moving and disturbing the carbon steel bent pipe after the workpiece frame (3) is immersed in the bottom of the zinc liquid pool (1).

2. The device for treating carbon steel rust in curved pipe wall according to claim 1, characterized in that: The active switching structure (4) comprises: A fixed disk (41), wherein the fixed disk (41) is fixed to the lower end of the movable end of the three-axis driving mechanism (2); A movable disk (42), wherein the movable disk (42) is movably connected to the fixed disk (41) via an elastic connection structure, the movable disk (42) and the fixed disk (41) are coaxially arranged, and the movable direction of the movable disk (42) is horizontal sliding along the radial direction of the fixed disk (41); A fixed rod (43), the upper end of the fixed rod (43) is fixed to the lower end of the movable plate (42), and the lower end of the fixed rod (43) is fixed to the upper end of the workpiece frame (3); There are a plurality of fixed rods (43) distributed along the circumference of the lower end of the movable disk (42), and the vibration motor (6) is located between the upper ends of the plurality of fixed rods (43).

3. The device for treating carbon steel rust in curved pipe wall according to claim 2, characterized in that: A first slide groove (411) is provided at the lower end of the fixed plate (41), and a second slide groove (421) is provided at the upper end of the movable plate (42), wherein the extension direction of the second slide groove (421) is consistent with the extension direction of the first slide groove (411); The elastic connection structure comprises a sliding link (44) and a first return spring (45); the upper and lower ends of the sliding link (44) extend into the first slide groove (411) and the second slide groove (421) respectively; the upper end of the sliding link (44) is integrally formed with a first limiting slider (441); the lower end of the sliding link (44) is integrally formed with a second limiting slider (442); the first limiting slider (441) and the second limiting slider (442) are respectively adapted to the first slide groove (411) and the second slide groove (421); Two first return springs (45) are provided and are respectively fixed to opposite sides of the sliding connecting rod (44); one end of the two first return springs (45) away from the sliding connecting rod (44) is respectively fixed to the inner side wall of the first sliding groove (411) and the inner side wall of the second sliding groove (421); Wherein, the first sliding groove (411) and the second sliding groove (421) are both T-shaped grooves, and the openings of the first sliding groove (411) and the second sliding groove (421) are arranged opposite to each other.

4. The device for treating carbon steel rust in curved pipe wall according to claim 3, characterized in that: The diameter of the movable plate (42) is greater than the diameter of the fixed plate (41), and the length of the second slide groove (421) is greater than the length of the first slide groove (411); The first slide groove (411), the second slide groove (421), the sliding link (44) and the first return spring (45) are provided in multiple groups, and the multiple first slide grooves (411), the second slide grooves (421), the sliding link (44) and the first return spring (45) are distributed in a circular array along the axis of the fixed disk (41).

5. The device for treating carbon steel rust in curved pipe wall according to claim 1, characterized in that: The disturbance component comprises: A movable plate (5), wherein the movable plate (5) is located below the workpiece frame (3); A connecting rod (51), the lower end of the connecting rod (51) is fixed to the upper surface of the movable plate (5), and the upper end of the connecting rod (51) is elastically connected to the workpiece frame (3) via an elastic member; A plurality of jacking columns (52) are provided and evenly distributed on the movable plate (5), and the plurality of jacking columns (52) are capable of penetrating the meshes of the mesh bottom (32); When the bottom surface of the movable plate (5) contacts the bottom of the zinc liquid pool (1), and the workpiece frame (3) continues to descend, the pushing column (52) passes through the mesh holes of the grid bottom (32) and pushes the carbon steel bent pipe in the workpiece frame (3).

6. The device for anti-rusting carbon steel on the wall of a bent pipe according to claim 5, characterized in that: The workpiece frame (3) is provided with a mounting cavity (33) opening downward at the corners; The elastic member comprises a second return spring (53), the upper end of the second return spring (53) is fixed to the top wall of the mounting cavity (33), the lower end of the second return spring (53) is fixed to the upper end of the connecting rod (51), and the upper end of the connecting rod (51) is slidably connected to the mounting cavity (33).

7. The device for treating carbon steel rust in curved pipe wall according to claim 6, characterized in that: The jacking column (52) comprises: A fixed top column (521), the lower end of the fixed top column (521) is fixed to the upper surface of the movable plate (5), the upper end of the fixed top column (521) is provided with a sliding cavity (525), the opening diameter of the sliding cavity (525) is smaller than the diameter of the sliding cavity (525) and the opening is arranged upward; A movable top head (522), the movable top head (522) is located above the fixed top column (521), a sliding rod (523) is integrally formed at the lower end of the movable top head (522), and the lower end of the sliding rod (523) slides through the sliding cavity (525); A third return spring (524), wherein the upper and lower ends of the third return spring (524) are respectively fixed to the lower end of the slide rod (523) and the inner bottom wall of the slide cavity (525); Wherein, the upper end of the movable top head (522) forms a hemispherical end head.

8. The device for treating carbon steel rust in curved pipe wall according to claim 2, characterized in that: The three-axis driving mechanism (2) comprises an X-axis slide rail (21), a Y-axis guide rail (22) and a Z-axis slide rail (23), wherein the Y-axis guide rail (22) is slidably mounted on the X-axis slide rail (21), and the Z-axis slide rail (23) is slidably mounted on the Y-axis guide rail (22); The movable end of the three-axis driving mechanism (2) comprises a sliding seat (24), the sliding seat (24) is slidably mounted on the lower end of the Z-axis slide rail (23), and the upper end of the movable disk (42) is fixed to the lower end of the sliding seat (24).

9. A method for anti-rust treatment of carbon steel on the wall of a curved pipe, applied to an anti-rust treatment device for carbon steel on the wall of a curved pipe as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Preparation: heating the zinc liquid in the zinc liquid pool (1) to a predetermined temperature, and placing the pre-treated carbon steel bent pipe into the workpiece frame (3); Step 2: hot-dip galvanizing is started by controlling the operation of the three-axis driving mechanism (2) to sink the workpiece frame (3) into the zinc liquid in the zinc liquid pool (1), and maintaining the temperature of the zinc liquid to hot-dip galvanize the carbon steel bent pipe; Step 3: Hot-dip galvanizing deep treatment, start the vibration motor (6) and control the three-axis drive mechanism (2) to drive the workpiece frame (3) to move up and down, and cooperate with the disturbance component to vibrate and disturb the carbon steel pipe fittings; Step 4: Hot dip galvanizing is completed.

10. A method for rust prevention of carbon steel on the wall of a bent pipe according to claim 9, characterized in that: In the step 3, the disturbance component below the workpiece frame (3) repeatedly contacts the bottom of the zinc liquid pool (1), thereby disturbing the carbon steel pipe fittings in the workpiece frame (3) and changing the posture of the carbon steel pipe fittings; The vibration motor (6) generates an exciting force and causes the workpiece frame (3) to vibrate. When the workpiece frame (3) vibrates, it drives the carbon steel pipe fitting to vibrate synchronously, so that bubbles that may exist in the carbon steel pipe fitting are discharged under the action of vibration and disturbance, and the bubbles are eliminated, so that the bending part in the carbon steel bent pipe is in contact with the zinc liquid more evenly, and at the same time, the zinc-iron alloy layer formed by the zinc liquid attached to the carbon steel bent pipe can be made more even. In addition, when the carbon steel pipe is disturbed, the contact dead angle between the carbon steel pipe and the workpiece frame (3) can be eliminated, so that the galvanizing operation can be completed at one time, reducing the defect rate of the finished product.

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