Energy-saving and environment-friendly intelligent pickling tank for seamless stainless steel pipe

Abstract

The utility model provides a kind of seamless stainless steel pipe is with energy -conserving and environment -protective intelligent pickling tank, including drive conveying outer box, drive conveying outer box and pickling treatment inner box inside are rotationally installed with transmission shaft, the one end of transmission shaft is fixed with the drive part output end fixedly installed outside drive conveying outer box, transmission shaft both ends are fixedly installed with sprocket, conveying chain is respectively assembled on the sprocket of transmission shaft installation, conveying chain between installation has steel pipe rack;Drive conveying outer box is fixedly installed with pickling treatment inner box in its inside, pickling treatment inner box is fixedly installed with the baffle of transverse equidistance arrangement in its inside;The utility model realizes steel pipe continuous transfer with automatic conveying system, wave path reduces residual liquid cross-contamination, guarantees soaking time uniform, each pool body collaborative work, reduce cost energy -conserving, improve efficiency and security.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe pickling technology, and in particular relates to an energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes. Background Technology

[0002] In the production and processing of seamless stainless steel pipes, pickling is a crucial step in removing oxide scale, oil, and impurities from the pipe surface, directly affecting the surface quality and subsequent performance of the steel pipe. Currently, the commonly used pickling methods in the industry often involve manual handling or simple conveying devices to sequentially feed the steel pipes into independent degreasing tanks, pickling tanks, and washing tanks for treatment. This presents the following technical problems:

[0003] Low level of automation and high labor intensity: In traditional processes, the transfer of steel pipes between different pools relies on manual operation, which is not only inefficient, but also requires operators to frequently come into contact with corrosive substances such as acids and degreasing agents, posing safety hazards.

[0004] Cross-contamination is severe and reagent consumption is high: When steel pipes are transferred from one pool to another, the large amount of liquid carried on the surface (such as acid carried into the washing pool and degreasing agent carried into the pickling pool) will cause cross-contamination of the treatment solutions in different pools. Frequent replacement of reagents is required to ensure the treatment effect, resulting in resource waste and environmental pressure.

[0005] Poor processing consistency and unstable quality: Manual operation makes it difficult to accurately control the soaking time and processing rhythm of steel pipes in each pool, which can easily lead to incomplete pickling or excessive corrosion of some steel pipes, affecting the uniformity of product quality.

[0006] Therefore, it is essential to invent an energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model provides an energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes. The tank includes a drive conveyor outer casing, drive shafts, sprockets, conveyor chains, steel pipe racks, an inner pickling tank, partitions, and a drive component. Several drive shafts are rotatably mounted inside both the drive conveyor outer casing and the inner pickling tank. One end of one drive shaft is fixed to the output end of a drive component fixedly mounted outside the drive conveyor outer casing. Sprockets are fixedly mounted at both ends of each drive shaft. Two conveyor chains are respectively mounted on the sprockets mounted on the drive shafts. Several steel pipe racks are installed between the two conveyor chains. The inner pickling tank is fixedly mounted inside the drive conveyor outer casing, and partitions are horizontally and equidistantly arranged inside the inner pickling tank.

[0008] Preferably, the inner wall of the drive conveyor outer box is fixedly connected to the outer wall of the pickling treatment inner box, and there is a gap at both ends, i.e. below, which provides space for the operation of the two conveyor chains and the steel pipe placement rack; a stationary storage groove is provided above one end of the drive conveyor outer box.

[0009] Preferably, the front and rear ends of the two conveyor chains are horizontal paths, with the front end being a steel pipe placement area and the rear end being a steel pipe unloading area. The steel pipe unloading area is located above the stationary storage trough. The middle section of the conveyor chain is a wavy path, with the wave crest located above the pickling treatment inner box and the wave trough located inside the pickling treatment inner box.

[0010] Preferably, the interior of the pickling treatment chamber is divided into different pool cavities by the partition. From the front end to the rear end of the conveyor chain, the cavities are degreasing pool, washing pool, pickling pool, and washing pool, respectively. The troughs of the middle section of the conveyor chain are located in different pool cavities inside the pickling treatment chamber.

[0011] Preferably, the partition has an inclined surface, and the peak of the middle section of the conveyor chain is located above the middle of the inclined surface; a corresponding drive shaft is rotatably installed in the middle of the lower part of each pool cavity of the pickling treatment inner tank, and the sprocket on the drive shaft is used to form the trough of the middle section of the conveyor chain.

[0012] Preferably, the steel pipe placement frame installed on the conveyor chain includes a side support plate, a bottom support shaft, and a binding rope. The two side support plates are respectively installed together with the inner side of the corresponding conveyor chain. A plurality of bottom support shafts are rotatably installed between the two side support plates, wherein the outer bottom support shaft is fixedly connected to one end of the bottom support shaft, and the other end of the bottom support shaft is wound and connected to another bottom support shaft.

[0013] Preferably, the two conveyor chains can drive the steel pipe placement rack into each chamber of the pickling treatment tank in sequence, and bring it out in sequence; the binding rope of the steel pipe placement rack is used to bind and restrict the steel pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention utilizes an automated conveying system composed of a drive component, a transmission shaft, a sprocket, and a conveying chain to achieve continuous transfer of steel pipes between various pools without the need for manual handling. This not only improves production efficiency but also avoids direct contact between operators and corrosive substances, thus enhancing production safety.

[0016] This invention employs a wave-path design in the middle section of the conveyor chain. The troughs ensure the steel pipe is fully immersed in the treatment liquid of the corresponding tank, while the crests are located above the inclined surface of the partition between tanks. The crests allow for natural stillness, reducing residual liquid on the steel pipe surface and significantly minimizing cross-contamination between different tanks. This design reduces reagent replacement frequency, saves on degreasing agents, acid, and clean water consumption, and indirectly reduces wastewater treatment costs.

[0017] The stable operation of the conveyor chain in this invention ensures that the immersion time of the steel pipe in each pool is uniform and controllable, avoiding the differences in processing rhythm caused by manual operation, effectively improving the consistency of surface treatment of seamless stainless steel pipes, and reducing the problems of incomplete pickling or excessive corrosion.

[0018] This utility model's pickling treatment inner chamber is divided into independent degreasing tank, washing tank, and pickling tank by partitions. Each tank has a clear function and works collaboratively. The structural cooperation between the drive conveyor outer chamber and the pickling treatment inner chamber provides a stable operating space for the conveyor chain, reducing the evaporation and waste of the treatment liquid. At the same time, the continuous processing flow reduces the energy consumption during equipment downtime, meeting the industry's demand for energy conservation and environmental protection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the drive conveyor outer box of this utility model before it is installed.

[0021] Figure 3 This is a structural schematic diagram of the conveyor chain and steel pipe placement rack of this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the drive conveyor outer box of this utility model.

[0023] Figure 5 This is a structural schematic diagram of the steel pipe placement rack of this utility model.

[0024] In the picture:

[0025] 1. Drive conveyor outer box; 2. Drive shaft; 3. Sprocket; 4. Conveyor chain; 5. Steel pipe placement rack; 51. Side support plate; 52. Bottom support shaft; 53. Binding rope; 6. Pickling treatment inner box; 7. Partition; 8. Drive components; 9. Static storage tank. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. 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 should fall within the protection scope of the present invention.

[0027] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0028] As attached Figure 1 To be continued Figure 5 As shown:

[0029] This utility model provides an energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes, comprising a drive conveying outer box 1, a drive shaft 2, a sprocket 3, a conveying chain 4, a steel pipe placement rack 5, a pickling treatment inner box 6, partitions 7, and a drive component 8. Several drive shafts 2 are rotatably mounted inside both the drive conveying outer box 1 and the pickling treatment inner box 6. One end of one drive shaft 2 is fixed to the output end of the drive component 8 fixedly mounted outside the drive conveying outer box 1. Sprockets 3 are fixedly mounted at both ends of each drive shaft 2. Two conveying chains 4 are respectively mounted on the sprockets 3 mounted on the drive shafts 2. Several steel pipe placement racks 5 are installed between the two conveying chains 4. The pickling treatment inner box 6 is fixedly installed inside the drive conveying outer box 1, and partitions 7 are arranged laterally at equal intervals inside the pickling treatment inner box 6.

[0030] Furthermore, the drive conveyor outer casing 1 is welded from 304 stainless steel, and its inner wall is fixedly connected to the outer wall of the pickling inner casing 6 by bolts. Spacing is reserved at the front, rear, and bottom of both. This spacing forms a closed operating channel, providing ample space for the cyclical movement of the two conveyor chains 4 and the steel pipe placement rack 5, avoiding frictional interference between moving parts and the casing wall. A stationary storage trough 9 is welded to the upper rear of the drive conveyor outer casing 1. This trough is made of PP material (resistant to acid and alkali corrosion), its length is adapted to the width of the drive conveyor outer casing 1, and its depth is 300mm. The bottom of the trough is designed with a 5° inclination, facilitating the natural sliding of the processed steel pipes to the end of the trough for centralized storage.

[0031] Furthermore, the two conveyor chains 4 are industrial-grade stainless steel roller chains. Both their front end (near the operator) and rear end (near the stationary collection tank 9) maintain a horizontal path, with the height of the horizontal section 1.2m above the bottom of the drive conveyor outer casing 1. The front horizontal section is the steel pipe placement area, where the conveyor chain 4's operating speed can be adjusted to 0.5m / min via the drive component 8 (for easy loading). The rear horizontal section is the steel pipe unloading area, directly below the entrance of the stationary collection tank 9, ensuring the steel pipes fall accurately into the tank. The middle section of the conveyor chain 4 has a continuous wavy path, with the peak of the wave 200mm from the top of the pickling inner casing 6 and the lowest point of the wave 300mm below the liquid surface of the pickling inner casing 6 (ensuring the steel pipes are completely submerged). The radius of curvature of the wavy path is 800mm to reduce stress concentration during chain operation.

[0032] Furthermore, the pickling treatment inner chamber 6 is integrally molded from fiberglass, and its interior is divided into four independent pool cavities by partitions 7. The length of each pool cavity is adapted to the steel pipe placement rack 5 (100mm longer than the steel pipe). From the front end to the rear end of the conveyor chain 4, the pool cavities are sequentially a degreasing tank, a primary water washing tank, an pickling tank, and a secondary water washing tank, with each pool cavity having a depth of 1.5m. The four troughs in the middle section of the conveyor chain 4 are respectively immersed in the above four pool cavities, with the troughs in the degreasing tank and the pickling tank being 30mm deeper than those in the water washing tank (due to the need for a higher concentration of treatment solution and more thorough immersion).

[0033] Furthermore, the partition 7 is made of PVC material, with its top inclined at a 30° angle towards the direction of the conveyor chain 4. The highest point of the slope is flush with the top of the tank cavity, and the lowest point smoothly transitions to the side wall of the tank cavity. The crest of the middle section of the conveyor chain 4 is located 50mm directly above the middle of the slope. This position allows residual liquid on the surface of the steel pipe to flow back to the original tank along the slope when the steel pipe is detached from the previous tank or stationary above the tank (the steel pipes in front and behind are immersed in the tank, so the steel pipe in between is above the tank, i.e., at the crest position), reducing cross-contamination. In the pickling treatment inner tank 6, a drive shaft 2 is rotatably mounted at the middle position of each tank cavity below through a bearing seat. The drive shaft 2 is made of 45# steel and heat-treated. The sprockets 3 fixed at both ends of the drive shaft 2 mesh with the conveyor chain 4. The height difference of the sprockets 3 (200mm lower than the sprockets 3 of the drive shafts 2 at both ends) forms the trough in the middle section of the conveyor chain 4, ensuring the stability of the chain's running trajectory.

[0034] Furthermore, the steel pipe placement rack 5 installed on the conveyor chain 4 includes side support plates 51, bottom support shafts 52, and binding ropes 53. The two side support plates 51 are made of Q235 steel plate, bent and formed, and are fixedly connected to the corresponding chain links on the inner side of the conveyor chain 4 by bolts. The spacing between the support plates is 50mm longer than the maximum diameter steel pipe. Five bottom support shafts 52 are rotatably mounted between the two side support plates 51 via bearings. The bottom support shafts 52 are made of stainless steel round tubes with rubber anti-slip sleeves (friction coefficient ≥0.8) on the surface. One end of the two outer bottom support shafts 52 is fixedly connected to a synchronous gear, and the other end is wound with a steel wire rope to the middle bottom support shaft 52, enabling synchronous rotation of the bottom support shafts 52 (speed matching the chain running speed) and preventing relative slippage between the steel pipe and the bottom support shaft 52.

[0035] Furthermore, the two conveyor chains 4, driven by sprockets 3, propel the steel pipe placement rack 5 at a speed of 0.8-1.2 m / min, sequentially entering the degreasing tank, primary washing tank, pickling tank, and secondary washing tank of the pickling treatment inner chamber 6. The immersion time in each tank cavity can be adjusted by the drive component 8 (range 5-15 min), and the pipes are drained at the crest position before being sequentially carried out. The binding rope 53 of the steel pipe placement rack 5 is made of acid and alkali resistant nylon rope, with both ends connected to the side support plate 51 by spring buckles. The binding tightness can be adjusted according to the diameter of the steel pipe (maximum tension 500 N), effectively limiting the radial displacement of the steel pipe during the conveying process (displacement ≤ 10 mm) and ensuring operational safety.

[0036] The working principle is as follows: First, the operator places the seamless stainless steel pipe to be processed in the steel pipe placement area at the front end of the conveyor chain 4. The steel pipe is supported by the bottom shaft 52 of the steel pipe placement frame 5, and the steel pipe is fixed by the binding rope 53 to prevent shaking or falling during the conveying process.

[0037] Subsequently, the drive unit 8 starts, driving the sprocket 3 to rotate via the drive shaft 2, which in turn drives the two conveyor chains 4 to run synchronously. The steel pipe placement rack 5 moves forward with the conveyor chains 4 and first enters the degreasing tank of the pickling treatment inner box 6. At this time, the trough in the middle section of the conveyor chain 4 completely immerses the steel pipe in the degreasing tank, where the degreasing agent removes oil and impurities from the surface of the steel pipe.

[0038] Next, the conveyor chain 4 continues to move the steel pipe placement rack 5. When it reaches the crest position between the degreasing tank and the primary washing tank, the steel pipe detaches from the degreasing tank, and the excess degreasing agent carried on its surface flows back to the degreasing tank along the slope of the baffle 7, reducing cross-contamination. Subsequently, the steel pipe enters the primary washing tank with the trough, where it is rinsed with clean water to remove any residual degreasing agent from its surface.

[0039] Afterwards, the steel pipe rack 5 passes through the corrugated drain and enters the pickling tank. In the pickling tank, the steel pipe is completely immersed in the acid solution, which reacts with the oxide scale on the surface of the steel pipe, thus peeling off the oxide scale. After the treatment is completed, the steel pipe passes through the corrugated drain to remove the acid solution and enters the secondary water washing tank for a second rinse to neutralize and remove any residual acid solution from the surface.

[0040] Finally, the conveyor chain 4 moves the processed steel pipe to the horizontal unloading area at the rear. The operator loosens the binding rope 53, removes the steel pipe, and as it sits above the static collection tank 9, the liquid on its surface falls into the static collection tank 9 below, sliding down the inclined bottom to the end of the tank for collection. Throughout the process, the speed of the conveyor chain 4 can be adjusted via the drive component 8 to control the immersion time of the steel pipe in each tank, ensuring a stable pickling effect.

[0041] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. An energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes, characterized in that, The system includes a drive conveyor outer box (1), a drive shaft (2), a sprocket (3), a conveyor chain (4), a steel pipe rack (5), a pickling treatment inner box (6), a partition (7), and a drive component (8). Several drive shafts (2) are rotatably installed inside the drive conveyor outer box (1) and the pickling treatment inner box (6). One end of one of the drive shafts (2) is fixed to the output end of the drive component (8) fixedly installed outside the drive conveyor outer box (1). Sprockets (3) are fixedly installed at both ends of each drive shaft (2). Two conveyor chains (4) are respectively mounted on the sprockets (3) installed on the drive shafts (2). Several steel pipe racks (5) are installed between the two conveyor chains (4). The pickling treatment inner box (6) is fixedly installed inside the drive conveyor outer box (1). The partitions (7) are arranged horizontally at equal intervals inside the pickling treatment inner box (6).

2. The energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes as described in claim 1, characterized in that: The inner wall of the drive conveyor outer box (1) is fixedly connected to the outer wall of the pickling treatment inner box (6), and there is a gap at both ends of the two boxes, which provides space for the operation of the two conveyor chains (4) and the steel pipe placement rack (5); a stationary storage trough (9) is provided above one end of the drive conveyor outer box (1).

3. The energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes as described in claim 2, characterized in that: The front and rear ends of the two conveyor chains (4) are horizontal paths. The front end is the steel pipe placement area and the rear end is the steel pipe unloading area. The steel pipe unloading area is located above the stationary storage tank (9). The middle section of the conveyor chain (4) is a wave path. Its wave crest is located above the pickling treatment inner box (6) and its wave trough is located inside the pickling treatment inner box (6).

4. The energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes as described in claim 3, characterized in that: The interior of the pickling treatment inner box (6) is divided into different pool cavities by the partition (7). From the front end to the rear end of the conveyor chain (4), the pool cavities are degreasing pool, water washing pool, pickling pool, and water washing pool respectively. The troughs of the middle section of the conveyor chain (4) are located in different pool cavities inside the pickling treatment inner box (6).

5. The energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes as described in claim 4, characterized in that: The partition (7) has an inclined surface, and the peak of the middle section of the conveying chain (4) is located above the middle of its inclined surface; each tank cavity of the pickling treatment inner box (6) is rotatably installed with a corresponding drive shaft (2) in the middle, and the sprocket (3) on the drive shaft (2) is used to form the trough of the middle section of the conveying chain (4).

6. The energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes as described in claim 5, characterized in that: The steel pipe placement rack (5) installed on the conveyor chain (4) includes a side support plate (51), a bottom support shaft (52) and a binding rope (53). The two side support plates (51) are respectively installed together with the inner side of the corresponding conveyor chain (4). A number of bottom support shafts (52) are rotatably installed between the two side support plates (51). The outer bottom support shaft (52) is fixedly connected to one end of the bottom support shaft (52), and the other end of the bottom support shaft (52) is wound and connected to another bottom support shaft (52).

7. The energy-saving, environmentally friendly, and intelligent pickling tank for seamless stainless steel pipes as described in claim 6, characterized in that: The two conveyor chains (4) can drive the steel pipe placement rack (5) into each pool cavity of the pickling treatment inner box (6) in sequence, and bring it out in sequence; the binding rope (53) of the steel pipe placement rack (5) is used to bind and restrict its steel pipe.

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