A metal pipe surface corrosion resistance protection integrated equipment

Abstract

This invention proposes an integrated device for corrosion protection of metal pipe surfaces, comprising an immersion-type anti-corrosion tank. A horizontally positioned main drive shaft is located in the center of the tank's inner cavity, and several sets of metal pipe feeding assemblies are mounted on the main drive shaft. Two horizontally positioned guide shafts are located at the bottom of the tank's inner cavity, and several pipe retainers corresponding to the metal pipe feeding assemblies are mounted on the guide shafts. This invention uses a pair of pipe support rollers and pipe retainers to constrain the metal pipes. During the rotation of the support rings, the metal pipes are guided from top to bottom. During the immersion process in the anti-corrosion liquid, the metal pipes contact the retainers and rotate, effectively preventing air bubbles from remaining in fixed positions within the metal pipes. This ensures effective contact between the inner wall of the metal pipes and the anti-corrosion liquid, and allows for continuous feeding of the metal pipes during the immersion process, facilitating batch processing.

Description

Technical Field

[0001] This invention relates to the field of metal corrosion protection technology, and in particular to an integrated device for corrosion-resistant protection of metal pipe surfaces. Background Technology

[0002] During the processing and manufacturing of metal pipe fittings, it is necessary to perform anti-corrosion treatment on their surface. Metal rust prevention and blackening treatment is a surface treatment process that involves immersing the metal pipe fittings in a room temperature blackening agent, which generates a dense black oxide film of iron tetroxide on the surface of the metal pipe fittings, thereby achieving rust prevention, corrosion prevention, decoration, and partial elimination of residual stress.

[0003] When a long metal tube is horizontally immersed in an anti-corrosion solution, air inside the tube cannot be completely expelled due to liquid surface tension, tube diameter limitations, and the horizontal orientation, easily forming trapped air bubbles at the top of the tube. These bubbles adhere to the inner wall, blocking the contact between the anti-corrosion solution and the metal substrate, preventing the formation of an effective anti-corrosion film or coating in that area, resulting in "galvanization gaps" or "passivation blind spots." Some solutions propose tilting the workpiece during immersion to facilitate liquid inflow and gas expulsion. This method is effective for single-piece and small-batch production, but for automated production lines and large-scale processing, achieving precise and continuous orientation adjustments increases equipment complexity and cost. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an integrated corrosion-resistant protection device for metal pipe surfaces, which more accurately solves the problems described above.

[0005] This invention is achieved through the following technical solution:

[0006] This invention proposes an integrated device for corrosion protection of metal pipe surfaces, including an immersion-type anti-corrosion box. The immersion-type anti-corrosion box has a horizontally positioned main drive shaft in the middle of its inner cavity. The main drive shaft is equipped with several sets of metal pipe feeding assemblies. The bottom of the immersion-type anti-corrosion box has two horizontally positioned guide shafts, and the guide shafts are equipped with several pipe retainers corresponding to the metal pipe feeding assemblies. The top of the pipe retainer is equipped with a material inlet.

[0007] The metal tube feeding assembly includes a connecting slide block slidably connected to the main drive shaft. The connecting slide block is connected to a support ring frame via several connecting rods. Several telescopic shafts are slidably inserted on the support ring frame. The outer end of each telescopic shaft is provided with a roller seat. The roller seat is provided with a pair of tube support rollers for rolling support of the metal tube. One end of the connecting slide block is rotatably connected to a transmission disc. The transmission disc is connected with a number of traction rods that are the same as the number of telescopic shafts. Several traction rods are respectively connected to the inner end of the corresponding telescopic shaft.

[0008] The immersion-type corrosion-resistant box has a liquid inlet hood at the bottom of one side wall along its length. The outer port of the liquid inlet hood is connected to the liquid outlet of the liquid supply pump. The bottom of the side wall away from the liquid inlet hood of the immersion-type corrosion-resistant box has a liquid collection hood, and the liquid collection hood is connected to the liquid pumping port of the liquid supply pump through a return liquid conduit.

[0009] The immersion-type corrosion-resistant box has an air blowing window on one side along its length. Several blowers are installed in the air blowing window, and an electric heating box is connected to the outer port of the air blowing window. The electric heating box fully covers the blowers.

[0010] Furthermore, the support ring frame is coaxial with the main drive shaft, and several telescopic shafts are arranged in a circular array along the axial direction of the main drive shaft, with the axial direction of the telescopic shafts pointing towards the center of the support ring frame. The axial direction of the tube support roller is parallel to the axial direction of the support ring frame.

[0011] Furthermore, a worm gear is integrally formed on the outer side of the transmission disc, and a worm support is fixed to the end of the connecting slide by bolts. A worm is connected to the worm support, and the worm meshes with the worm gear.

[0012] Furthermore, the main drive shaft is a splined shaft body, and the connecting slide and the worm gear are provided with a splined shaft hole that mates with the main drive shaft.

[0013] Furthermore, the bottom two sides of the pipe fitting retainer are integrally formed with sliding feet, and the two sliding feet at the bottom of the pipe fitting retainer are respectively engaged with two guide shafts for sliding.

[0014] Furthermore, the tube retainer is integrally formed with guide angle seats at both ends of the inlet, and the inner ring wall of the tube retainer is provided with a rough surface liner.

[0015] Furthermore, the liquid inlet hood and liquid collection hood are located at the position of the metal pipe's rotation stroke, and the liquid guiding direction of the liquid supply pump is horizontal and transverse.

[0016] Furthermore, the liquid-immersion corrosion-resistant box is equipped with a gas collection hood on the side away from the air blowing window, and the gas collection hood is connected to the air inlet of the electric heating box through a warm air return pipe.

[0017] Furthermore, the air blowing window is waist-shaped, and the arrangement of several air blowers corresponds to the rotation stroke position of the metal tube.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention uses a pair of tube support rollers and a tube holder to restrict the metal tube. During the rotation of the support ring, the metal tube is guided from top to bottom. During the process of being immersed in the anti-corrosion liquid, the metal tube contacts the tube holder and rotates, which effectively prevents air bubbles inside the metal tube from being stuck in a fixed position. This ensures that the inner wall of the metal tube is in effective contact with the anti-corrosion liquid. At the same time, the immersion process of the metal tube can be continuously fed, which is convenient for batch processing.

[0020] 2. This invention can adjust the distance between the pipe support roller and the inner ring wall of the pipe fitting holder, thereby meeting the processing needs of metal pipe fittings of different diameters. It can also adjust the distance between each group of metal pipe feeding components and the pipe fitting holder to match the length of the metal pipe fitting, making it more suitable for processing metal pipe fittings of different diameters and lengths.

[0021] 3. Under the operation of the liquid supply pump, the anti-corrosion liquid at the bottom of the immersion anti-corrosion box forms a horizontal flow, which can guide the anti-corrosion liquid into the metal pipe and remove air bubbles inside the metal pipe, effectively preventing air bubbles from remaining in the metal pipe.

[0022] 4. After the metal pipe is immersed in the liquid, the present invention can blow air axially on the metal pipe after it has been removed from the anti-corrosion liquid, thereby accelerating the dehydration of the anti-corrosion liquid on the surface of the metal pipe. Furthermore, the heating of the airflow blown in by the blower by the electric heating box accelerates the drying of the anti-corrosion liquid on the pipe wall of the metal pipe. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0025] Figure 3 This is a partial cross-sectional view of the three-dimensional structure of the present invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the assembly of the metal tube feeding assembly and the tube retainer in this invention;

[0027] Figure 5 This is a first three-dimensional structural diagram of the metal tube feeding assembly in this invention;

[0028] Figure 6 This is a schematic diagram of the second three-dimensional structure of the metal tube feeding assembly in this invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the pipe fitting retainer in this invention;

[0030] Figure 8 This is a front sectional view of the structure of the present invention;

[0031] Figure 9 This is a side sectional view of the structure of the present invention.

[0032] In the diagram: 1. Immersion corrosion-resistant box; 101. Main drive shaft; 1011. Motor; 102. Guide slide shaft; 103. Liquid inlet hood; 1031. Liquid collection hood; 104. Air blowing window; 1041. Air collection hood; 1042. Warm air return pipe; 2. Metal pipe feeding assembly; 201. Support ring frame; 202. Telescopic shaft; 2021. Roller seat; 2022. Pipe support roller; 203. Connecting slide; 2 031. Connecting support rod; 204. Transmission disc; 2041. Worm gear; 2042. Worm support; 2043. Worm; 2044. Splined shaft hole; 205. Pull rod; 3. Pipe retainer; 301. Sliding foot; 302. Feed inlet; 3021. Guide angle seat; 303. Rough surface liner; 4. Liquid supply pump; 401. Return liquid conduit; 5. Blower; 6. Electric heating box; 7. Metal pipe fittings. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] An integrated corrosion protection device for metal pipe surfaces includes an immersion-type anti-corrosion box 1, combined with... Figure 1 and Figure 4 As shown, the immersion corrosion-resistant box 1 has a horizontally positioned main drive shaft 101 in the middle of its inner cavity. Several sets of metal pipe feeding assemblies 2 are mounted on the main drive shaft 101. Two horizontally positioned guide shafts 102 are located at the bottom of the inner cavity of the immersion corrosion-resistant box 1, and several pipe retainers 3 corresponding to the metal pipe feeding assemblies 2 are mounted on the guide shafts 102. Figure 4 , Figure 5 and Figure 6As shown, the metal tube feeding assembly 2 includes a connecting slide 203 slidably connected to the main drive shaft 101. The connecting slide 203 is connected to a support ring frame 201 via several connecting support rods 2031. The support ring frame 201 is coaxial with the main drive shaft 101. Several telescopic shafts 202 are slidably inserted into the support ring frame 201. The telescopic shafts 202 are arranged in a circular array along the axial direction of the main drive shaft 101, and the axial direction of the telescopic shafts 202 points to the center of the support ring frame 201. The outer end of the telescopic shaft 202 is provided with a roller seat 2021. The roller seat 2021 is provided with a pair of tube support rollers 2022 for rolling support of the metal tube 7. The axial direction of the tube support rollers 2022 is parallel to the axial direction of the support ring frame 201. The telescopic shaft 202 is a splined shaft body, which maintains the rolling direction of the tube support rollers 2022. Specific operation is as follows: Figure 9 As shown, the metal pipe 7 is restricted by a pair of pipe support rollers 2022 and a pipe retainer 3. During the rotation of the support ring 201, the metal pipe 7 is guided from top to bottom. During the process of being guided into the anti-corrosion liquid, the metal pipe 7 contacts the pipe retainer 3 and rotates, effectively preventing air bubbles inside the metal pipe 7 from being stuck in a fixed position.

[0036] The top of the pipe retainer 3 is provided with an inlet 302 for inserting the metal pipe 7. The pipe retainer 3 has guide angle seats 3021 integrally formed at both ends of the inlet 302 to facilitate the insertion of the metal pipe 7. The inner wall of the pipe retainer 3 is provided with a rough surface liner 303. The rough surface liner 303 can increase the friction with the outer wall of the metal pipe 7, thereby causing the metal pipe 7 to rotate.

[0037] The level of the anti-corrosion liquid stored in the immersion anti-corrosion box 1 is lower than the height of components such as the connecting slide 203, so that the inner cavity of the immersion anti-corrosion box 1 is divided into areas for immersion and dehydration.

[0038] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: The present invention restricts the metal pipe 7 by a pair of pipe support rollers 2022 and a pipe retainer 3. During the rotation of the support ring 201, the metal pipe 7 is guided from top to bottom. During the process of being guided into the anti-corrosion liquid, the metal pipe 7 contacts the pipe retainer 3 and rotates, which effectively avoids air bubbles inside the metal pipe 7 from being stuck in a fixed position, and makes the inner wall of the metal pipe 7 effectively contact the anti-corrosion liquid. At the same time, the immersion process of the metal pipe 7 can be continuously fed, which is convenient for batch processing.

[0039] Example 2

[0040] Combination Figure 5 and Figure 6As shown, a transmission disc 204 is rotatably connected to one end of the connecting slide 203. The transmission disc 204 is connected to a number of traction rods 205 that are the same as the number of telescopic shafts 202. Several traction rods 205 are respectively connected to the inner ends of the corresponding telescopic shafts 202. A worm gear 2041 is integrally formed on the outer side of the transmission disc 204. A worm support 2042 is fixed to the end of the connecting slide 203 by bolts. A worm 2043 is connected to the worm support 2042, and the worm 2043 is engaged with the worm gear 2041. By twisting the worm 2043 with tools such as a wrench, the worm 2043 meshes with the worm wheel 2041, thereby driving the transmission disc 204 to rotate. When the transmission disc 204 rotates, it pulls the telescopic shaft 202 to extend and retract through various traction rods 205, adjusting the distance between the tube support roller 2022 and the inner wall of the tube holder 3, thus meeting the processing and use of metal tubes 7 of different diameters.

[0041] The main drive shaft 101 is a spline shaft. The connecting slide 203 and the worm gear 2043 are provided with a spline shaft hole 2044 that mates with the main drive shaft 101. Under the drive of the motor 1011 to the main drive shaft 101, the main drive shaft 101 transmits torque to the connecting slide 203. At the same time, the connecting slide 203 can slide on the main drive shaft 101 to adjust the spacing between each group of metal tube feeding assemblies 2 to match the length of the metal tube 7.

[0042] The bottom sides of the pipe retainer 3 are integrally formed with sliding support feet 301. The two sliding support feet 301 at the bottom of the pipe retainer 3 are respectively engaged with two guide shafts 102 to slide and adjust the spacing of each pipe retainer 3 to match the length of the metal pipe 7.

[0043] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: the present invention can adjust the distance between the pipe support roller 2022 and the inner ring wall of the pipe retainer 3, thereby meeting the processing and use of metal pipes 7 of different diameters. It can also adjust the distance between each group of metal pipe feeding components 2 and the pipe retainer 3 to match the length of the metal pipe 7, and has higher applicability to the processing of metal pipes 7 of different diameters and lengths.

[0044] Example 3

[0045] Combination Figure 1 , Figure 2 , Figure 3 and Figure 8As shown, the immersion-type corrosion protection tank 1 has a liquid inlet hood 103 at the bottom of one side wall along its length. The outer port of the liquid inlet hood 103 is connected to the outlet port of the liquid supply pump 4. The bottom of the side wall away from the liquid inlet hood 103 has a liquid collection hood 1031, which is connected to the suction port of the liquid supply pump 4 via a return pipe 401. The liquid inlet hood 103 and the liquid collection hood 1031 are positioned at the rotation stroke of the metal pipe 7. The liquid supply pump 4 guides the liquid horizontally. After the metal pipe 7 is completely immersed in the corrosion protection liquid, the corrosion protection liquid at the bottom of the inner cavity of the immersion-type corrosion protection tank 1 flows horizontally under the operation of the liquid supply pump 4. This allows the corrosion protection liquid to be horizontally introduced into the metal pipe 7, expelling air bubbles from inside the metal pipe 7 and effectively preventing air bubbles from remaining inside the metal pipe 7.

[0046] Combination Figure 1 , Figure 2 , Figure 3 and Figure 9 As shown, the immersion-type anti-corrosion box 1 has an air blowing window 104 located above one side along its length. Several blowers 5 are installed in the air blowing window 104. An electric heating box 6 is connected to the outer port of the air blowing window 104. The electric heating box 6 fully covers the blowers 5. Under the operation of the blowers 5, axial air can be blown onto the metal pipe 7 that has been detached from the anti-corrosion liquid, which can accelerate the dehydration of the anti-corrosion liquid on the surface of the metal pipe 7. Furthermore, under the heating of the airflow blown in by the blowers 5 by the electric heating box 6, the drying of the anti-corrosion liquid on the pipe wall of the metal pipe 7 is accelerated. On the side of the immersion-type anti-corrosion box 1 away from the air blowing window 104, there is a gas collecting hood 1041. The gas collecting hood 1041 is connected to the air inlet of the electric heating box 6 through a warm air return pipe 1042, which can recover the hot air and recycle it, making it more energy-efficient.

[0047] The air blowing window 104 is waist-shaped, and the arrangement of several blowers 5 corresponds to the rotation stroke position of the metal tube 7, so that the blowers 5 can maintain effective air blowing on the metal tube 7 during the guiding process of the metal tube 7.

[0048] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: When the liquid supply pump 4 is working, the anti-corrosion liquid at the bottom of the immersion anti-corrosion box 1 forms a horizontal flow, which can guide the anti-corrosion liquid horizontally into the metal pipe 7, and remove the air bubbles inside the metal pipe 7, effectively avoiding the air bubbles remaining in the metal pipe 7.

[0049] After the metal pipe 7 is immersed in the anti-corrosion liquid, the blower 5 can blow air axially on the metal pipe 7 that has been removed from the anti-corrosion liquid, thereby accelerating the dehydration of the anti-corrosion liquid on the surface of the metal pipe 7. Furthermore, the heating of the airflow blown in by the blower 5 by the electric heating box 6 accelerates the drying of the anti-corrosion liquid on the pipe wall of the metal pipe 7.

[0050] Of course, the present invention may have many other embodiments. Based on this embodiment, other embodiments obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention.

Claims

1. An integrated corrosion-resistant protection device for metal pipe surfaces, comprising an immersion-type anti-corrosion box (1), characterized in that, The immersion corrosion-resistant box (1) has a horizontally positioned main drive shaft (101) in the middle of its inner cavity. The main drive shaft (101) is equipped with several sets of metal pipe feeding assemblies (2). The bottom of the inner cavity of the immersion corrosion-resistant box (1) is equipped with two horizontally positioned guide slide shafts (102). The guide slide shafts (102) are equipped with several pipe retainers (3) corresponding to the metal pipe feeding assemblies (2). The top of the pipe retainer (3) is equipped with a feed inlet (302). The metal tube feeding assembly (2) includes a connecting slide (203) slidably connected to the main drive shaft (101). The connecting slide (203) is connected to a support ring frame (201) through several connecting support rods (2031). Several telescopic shafts (202) are slidably inserted on the support ring frame (201). The outer end of the telescopic shaft (202) is provided with a roller seat (2021). The roller seat (2021) is provided with a pair of tube support rollers (2022) for rolling support of the metal tube (7). One end of the connecting slide (203) is rotatably connected to a transmission disk (204). The transmission disk (204) is connected with a number of traction rods (205) that are the same as the number of telescopic shafts (202). Several traction rods (205) are respectively connected to the inner end of the corresponding telescopic shafts (202). The immersion corrosion-resistant box (1) has a liquid inlet cover (103) at the bottom of one side wall along its length. The outer port of the liquid inlet cover (103) is connected to the liquid outlet of the liquid supply pump (4). The immersion corrosion-resistant box (1) has a liquid collection cover (1031) at the bottom of one side wall away from the liquid inlet cover (103). The liquid collection cover (1031) is connected to the liquid pump (4) through a return pipe (401). The immersion anti-corrosion box (1) is provided with an air blowing window (104) on one side of the length direction. Several blowers (5) are provided in the air blowing window (104). An electric heating box (6) is connected to the outer port of the air blowing window (104). The electric heating box (6) fully covers the several blowers (5).

2. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The support ring frame (201) is coaxial with the main drive shaft (101), and several telescopic shafts (202) are arranged in a ring array along the axial direction of the main drive shaft (101), with the axial direction of the telescopic shafts (202) pointing towards the center of the support ring frame (201). The axial direction of the tube support roller (2022) is parallel to the axial direction of the support ring frame (201).

3. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The outer side of the transmission disc (204) is integrally formed with a worm gear (2041), and the end of the connecting slide (203) is fixed with a worm support (2042) by bolts. A worm (2043) is connected to the worm support (2042), and the worm (2043) is engaged with the worm gear (2041) in transmission.

4. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The main drive shaft (101) is a spline shaft body, and the connecting slide (203) and the worm (2043) are provided with a spline shaft hole (2044) that mates with the main drive shaft (101).

5. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The bottom sides of the pipe retainer (3) are integrally formed with sliding feet (301), and the two sliding feet (301) at the bottom of the pipe retainer (3) are respectively engaged with two guide shafts (102) for sliding.

6. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The pipe retainer (3) is integrally formed with guide angle seats (3021) at both ends of the feed inlet (302), and the inner ring wall of the pipe retainer (3) is provided with a rough surface liner (303).

7. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The liquid inlet hood (103) and liquid collection hood (1031) are located at the position of the rotation stroke of the metal pipe fitting (7), and the liquid guiding direction of the liquid supply pump (4) is horizontal.

8. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The immersion corrosion-resistant box (1) is provided with a gas collection hood (1041) on the side away from the air blowing window (104). The gas collection hood (1041) is connected to the air inlet of the electric heating box (6) through the warm air return pipe (1042).

9. The integrated corrosion-resistant protection device for metal pipe surfaces according to claim 1, characterized in that, The air blowing window (104) is waist-shaped, and the arrangement of several air blowers (5) corresponds to the rotation stroke position of the metal pipe (7).

Images