Pickling apparatus for seamless pipe

Abstract

The utility model relates to a pickling device for seamless tube, including pickling pool, the stirring member of rotation installation in pickling pool, pipe body and the support of pipe body loading and adjusting support carry out up and down movement to realize the adjusting module of pipe body pickling, the support includes fixed plate, the front mounting plate of being located fixed plate front and back two sides, rear mounting plate and with front mounting plate fixed a plurality of front fixed ring, with rear mounting plate fixed a plurality of rear fixed ring, each front fixed ring is along the length direction interval arrangement of front mounting plate and rear fixed ring is along the length interval arrangement of rear mounting plate, and the height of each front fixed ring is higher than rear fixed ring to make the pipe body present from front to back and from top to bottom and the inclined shape. Adopt above -mentioned scheme, provide a kind of pickling device for seamless tube by making the pipe fitting loaded in support present inclined and from pickling pool inside exit after gravity makes its internal acid liquor flow out.

Description

Technical Field

[0001] This utility model relates to a pickling device for seamless tubes. Background Technology

[0002] Seamless pipes are widely used in petroleum, chemical, power, and machinery manufacturing industries due to their high strength, high pressure resistance, and good sealing performance. However, during the production process, a layer of iron oxide scale (such as Fe2O3 or Fe3O4) often forms on the surface of the pipe after hot rolling or heat treatment. This iron oxide scale not only affects the quality of subsequent processing but may also reduce the corrosion resistance and appearance of the product. Therefore, pickling can effectively remove this iron scale.

[0003] However, since the seamless tube itself is a hollow elongated cylinder, in traditional pickling equipment, even after pickling is completed, a large amount of pickling liquid will still remain inside the tube cavity and be difficult to drain. This residual pickling liquid will not only waste acid resources but may also cause cross-contamination in subsequent water washing or drying processes. In addition, relying on purging and manual dumping to drain the liquid requires additional equipment or reduces efficiency.

[0004] Therefore, how to simultaneously pour out the pickling solution during the process of seamless pipe leaving the pickling tank, thereby facilitating the removal of the pickling solution and improving cleaning efficiency, has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pickling device for seamless pipes, which causes the acid inside the pipe to flow out by gravity after the pipe installed in the support is tilted and leaves the pickling tank.

[0006] To achieve the above objectives, this utility model provides the following technical solution: including an acid pickling tank, a stirring component rotatably installed in the acid pickling tank, a pipe body, and a support and adjusting support for loading the pipe body, which move up and down to achieve the acid pickling of the pipe body. The support includes a fixed plate, a front mounting plate and a rear mounting plate located on the front and rear sides of the fixed plate, and a plurality of front fixing rings fixed to the front mounting plate and a plurality of rear fixing rings fixed to the rear mounting plate. The front fixing rings are arranged at intervals along the length direction of the front mounting plate, and the rear fixing rings are arranged at intervals along the length direction of the rear mounting plate. The height of each front fixing ring is higher than that of the rear fixing ring so that the pipe body is inclined from front to back and from top to bottom.

[0007] The present invention is further configured to include a front mating ring connected to each front fixing ring and located below the corresponding front fixing ring, and a rear mating ring connected to each rear fixing ring and located below the corresponding rear fixing ring.

[0008] The present invention is further configured to include a synchronization module, wherein the front mounting plate and the rear mounting plate are slidably mounted in the fixed plate, and the synchronization module is used to make the front mounting plate and the rear mounting plate move closer to or further away from each other.

[0009] The present invention is further configured such that: the synchronization module includes a left screw, a right screw, and a timing belt rotatably mounted in a fixed plate; the left screw includes a positive thread section and a negative thread section; the positive thread section engages with the left thread of the front mounting plate, while the negative thread section engages with the rear thread of the rear mounting plate; the right screw has the same shape as the left screw; a left drive wheel is mounted on the left screw, and a right drive wheel is mounted on the right screw; the timing belt transmission is located between the left drive wheel and the right drive wheel.

[0010] The present invention is further configured such that: the adjustment module includes a hydraulic cylinder, a left adjustment rod on the left side of the bracket and a right adjustment rod on the right side, the fixing plate is fixedly connected to the bracket, and the number of hydraulic cylinders is two, so that the left adjustment rod and the right adjustment rod can move up and down synchronously.

[0011] The present invention is further configured to include a partition frame that can be detachably installed in the pickling tank. The pickling tank includes a reaction chamber located above the partition frame and an isolation chamber located below the partition frame. The stirring element includes a stirring blade located in the reaction chamber and the bottom of the stirring blade located in the isolation chamber.

[0012] The present invention is further configured such that: the partition frame includes each positioning plate, each positioning plate is attached to the inner wall of the pickling tank, and the partition frame also includes positioning blocks located on each positioning plate, each positioning block being inserted into the top of the pickling tank and bolted to the pickling tank.

[0013] By adopting the above technical solution, the placement of the pipe body can be achieved by setting a front fixed ring and a rear fixed ring. The pipe body located on the support can be moved down for pickling or moved up to separate from the pickling tank by adjusting the support. Since the front fixed ring is higher than the rear fixed ring, the pickling solution in the pipe cavity can flow naturally to the rear end under the action of gravity during the pickling process and be discharged after pickling. This effectively avoids the accumulation of acid in the pipe and significantly reduces the residual acid in the pipe, which facilitates subsequent manual drainage or purging. Furthermore, the reduction of residual acid can reduce the corrosion of the pipeline caused by acid retention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an assembly drawing illustrating a specific embodiment of the present utility model; Figure 2 This is a cross-sectional view of the present invention from right to left; Figure 3 This is an exploded view of the present invention; Figure 4 This is a cross-sectional view of the present invention from front to back.

[0016] In the diagram: 1-Acid washing tank, 11-Reaction chamber, 12-Isolation chamber; 2-Agitator component, 21-Agitator blade, 22-Shaft; 3-Bracket, 31-Fixing plate, 32-Front mounting plate, 321-Front retaining ring, 33-Rear mounting plate, 331-Rear retaining ring; 4-Adjustment module, 41-Hydraulic cylinder, 42-Left adjusting rod, 43-Right adjusting rod; 5- Front mating ring; 6-Rear mating ring; 7-Synchronous module, 71-Left screw, 711-Front drive pulley, 712-Positive thread section, 713-Negative thread section, 72-Right screw, 721-Right drive pulley, 73-Synchronous belt; 8-Separator frame, 81-Positioning plate, 811-Positioning insert. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-4As shown, this utility model discloses an acid pickling device for seamless tubes, including an acid pickling tank 1, a stirring component 2 rotatably installed in the acid pickling tank 1, a tube body (not shown in the figure), a support 3 for loading the tube body, and an adjustment module 4 for adjusting the support 3 to move up and down to achieve tube body acid pickling. By placing the tube body to be acid-picked into the support 3, the adjustment module 4 drives the support 3 to move down into the acid pickling tank 1, thereby converting oxides into soluble salts and peeling them off from the tube body surface. The support 3 includes a fixed plate 31, a front mounting plate 32 located on the front and rear sides of the fixed plate 31, a rear mounting plate 33, and a plurality of front fixing rings 321 fixed to the front mounting plate 32 and a plurality of rear fixing rings 331 fixed to the rear mounting plate 33. The front fixing rings 321 are arranged at intervals along the length direction of the front mounting plate 32 and then fixed. The fixed rings 331 are arranged at intervals along the length of the rear mounting plate 33. The height of each front fixed ring 321 is higher than that of the rear fixed ring 331 so that the pipe body is inclined from front to back and from top to bottom. By setting the front fixed rings 321 and the rear fixed rings 331, the pipe body can be placed so that the pipe body located on the support 3 can be moved down for pickling or moved up to separate from the pickling tank 1 by adjusting the support 3. Since the front fixed rings 321 are higher than the rear fixed rings 331, the pickling liquid in the pipe cavity during the pickling process can flow naturally to the rear end under the action of gravity and be discharged after the pickling is completed, which effectively avoids the accumulation of acid in the pipe and significantly reduces the residual acid in the pipe, so as to facilitate subsequent manual drainage or purging. Furthermore, the reduction of residual acid can reduce the corrosion of the pipeline caused by acid retention.

[0019] It is worth noting that in this scheme, after the seamless tube is installed with the front and rear fixing rings, although the whole body is tilted from front to back, preferably, the angle between the tube axis and the horizontal plane is 3° to 15°. If the angle is too small, the drainage will be obstructed, and if it is too large, it will affect the clamping stability or cause acid to overflow. However, since the inner diameter of the fixing ring is slightly larger than the outer diameter of the tube and forms a ring-shaped covering structure, the tube only slightly abuts against the rear mating ring along the axial direction under its own weight, and will not detach radially or roll off. In addition, it is preferable to provide a rubber pad or V-groove in the fixing ring, or to provide an acid-resistant elastic lining or positioning groove on the inner wall of the fixing ring to enhance the clamping and anti-slip effect of the tube.

[0020] It also includes a front mating ring 5 connected to each front fixing ring 321 and located below the corresponding front fixing ring 321, and a rear mating ring 6 connected to each rear fixing ring 331 and located below the corresponding rear fixing ring 331. Due to the presence of the front mating ring 5 and the rear mating ring 6, the positions for pipe fittings to be installed on the front mounting plate 32 and the rear mounting plate 33 can be effectively increased, thereby enabling more pipe fittings to be installed in the bracket 3 for pickling, thereby improving pickling efficiency.

[0021] The system also includes a synchronization module 7. The front mounting plate 32 and the rear mounting plate 33 are slidably installed in the fixed plate 31. The synchronization module 7 allows the front mounting plate 32 and the rear mounting plate 33 to move closer or further apart from each other. The synchronization module 7 can drive the front mounting plate 32 and the rear mounting plate 33 to slide relative to each other in the fixed plate 31, thereby adjusting the distance between them to adapt to various specifications of pipe fittings. This ensures that the front fixing ring 321 and the rear fixing ring 331 are stably located on the front and rear sides of the pipe fitting circumferentially, thereby achieving the clamping of the pipe fitting.

[0022] The synchronization module 7 includes a left screw 71, a right screw 72, and a timing belt 73, all rotatably mounted within a fixed plate 31. The left screw 71 includes a positive thread section 712 and a negative thread section 713. The positive thread section 712 engages with the left thread of the front mounting plate 32, while the negative thread section 713 engages with the rear thread of the rear mounting plate 33. The right screw 72 has the same shape as the left screw 71. A left drive wheel is mounted on the left screw 71, and a right drive wheel 721 is mounted on the right screw 72. The timing belt 73 is positioned between the left and right drive wheels 721. The motor's output shaft is fixed to either the left or right drive wheel 721 (this is prior art). The rotating left or right drive wheel 721 (not shown in the figure) can transmit torque to the synchronous belt 73, causing the other drive wheel to rotate. As the left and right drive wheels 721 rotate, the left screw 71 and the right screw 72 can rotate. Since the left screw 71 and the right screw 72 are respectively inserted on the left and right sides of each mounting plate, they cannot drive the mounting plates to rotate, causing the mounting plates to move back and forth along the axial direction of the left screw 71 and the right screw 72. Since the left screw 71 includes a positive thread section 712 and a negative thread section 713, and the right screw 72 is the same as the left screw 71, the front mounting plate 32 and the rear mounting plate 33 can achieve synchronous movement of approaching or moving away.

[0023] The adjustment module 4 includes a hydraulic cylinder 41, a left adjustment rod 42 on the left side of the support 3, and a right adjustment rod 43 on the right side. The fixing plate 31 is fixedly connected to the support 3. The hydraulic cylinder 41 consists of two cylinders, which allows the left adjustment rod 42 and the right adjustment rod 43 to move up and down synchronously. Therefore, by using a diversion valve or servo control to start the hydraulic cylinder 41, a large thrust can be provided to smoothly realize the lifting and lowering of the support 3 and drive the movement of the pipe. Specifically, the extension and retraction of the hydraulic cylinder 41 can drive the left adjustment rod 42 and the right adjustment rod 43 to move up and down, thereby realizing the lifting and lowering of the support 3.

[0024] In addition, it includes a partition frame 8 that can be detachably installed in the pickling tank 1 by means of bolts, clips, etc. The pickling tank 1 includes a reaction chamber 11 located above the partition frame 8 and an isolation chamber 12 located below the partition frame. The stirring component 2 includes a stirring blade 21 located in the reaction chamber 11 and a rotating shaft 22. The rotating shaft 22 is inserted into the partition frame 8 and its bottom is located in the isolation chamber 12. By starting the motor (not shown in the figure) fixed to the rotating shaft 22, the output shaft of the motor drives the stirring blade 21 to rotate, thereby agitating the acid solution to promote the reaction and improve the pickling efficiency. The detachability of the partition frame 8 makes it easy to pour out the acid solution located in the partition frame 8 and the substances that fall into the acid solution.

[0025] Preferably, within the lifting and lowering adjustment range of the bracket 3, when the bracket 3 moves to the bottom, the bottom of the pipe will not contact the stirring blade 21, thereby preventing the stirring blade 21 from contacting the pipe circumferentially and causing wear.

[0026] The partition frame 8 includes positioning plates 81, each of which is attached to the inner wall of the pickling tank 1. The partition frame 8 also includes positioning blocks 811 located on each positioning plate 81. Each positioning block 811 is inserted into the top of the pickling tank 1 and bolted to it. Since each positioning plate 81 of the partition frame 8 is attached to the inner wall of the pickling tank 1, after the mounting plates are fixed in the pickling tank 1, the partition frame 8 will not loosen during use and will stably play the role of separating the reaction chamber 11 and the isolation chamber 12.

[0027] The stirring element 2 passes through the partition frame 8 via a drive shaft, and its penetration part is equipped with a mechanical sealing device (such as an acid-resistant mechanical seal ring or a packing seal structure) to ensure that the pickling liquid in the reaction chamber 11 does not leak into the drive mechanism area below the isolation chamber 12. At the same time, the partition frame 8 is tightly fitted to the inner wall of the pickling tank 1 and is sealed by the positioning insert 811 and bolts. A sealing ring can be set between the partition frame 8 and the pickling tank 1 to reduce the flow of acid liquid from the gap between the partition frame 8 and the pickling tank 1, so that the reaction chamber 11 and the isolation chamber 12 are effectively isolated. This ensures that the stirring blade 21 can fully agitate the acid liquid in the reaction chamber 11, and prevents the sediment from rising or acid mist from entering the isolation chamber 12.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pickling device for seamless tubes, comprising a pickling tank, a stirring element rotatably mounted in the pickling tank, a tube body, and a support for loading the tube body and an adjusting support that can move up and down to achieve pickling of the tube body, characterized in that: The bracket includes a fixed plate, a front mounting plate located on the front and rear sides of the fixed plate, a rear mounting plate, and a plurality of front fixing rings fixed to the front mounting plate and a plurality of rear fixing rings fixed to the rear mounting plate. The front fixing rings are arranged at intervals along the length of the front mounting plate, and the rear fixing rings are arranged at intervals along the length of the rear mounting plate. The height of each front fixing ring is higher than that of the rear fixing rings so that the tube body is inclined from front to back and from top to bottom.

2. The pickling apparatus for seamless tubes according to claim 1, characterized in that: It also includes a front mating ring connected to each front fixing ring and located below the corresponding front fixing ring, and a rear mating ring connected to each rear fixing ring and located below the corresponding rear fixing ring.

3. A pickling apparatus for seamless tubes according to claim 1 or 2, characterized in that: It also includes a synchronization module, in which the front mounting plate and the rear mounting plate are slidably installed in the fixed plate, and the synchronization module makes the front mounting plate and the rear mounting plate move closer or further apart.

4. The pickling apparatus for seamless tubes according to claim 3, characterized in that: The synchronization module includes a left screw, a right screw, and a timing belt rotatably mounted in a fixed plate. The left screw includes a positive thread section and a negative thread section. The positive thread section engages with the left thread of the front mounting plate, while the negative thread section engages with the rear thread of the rear mounting plate. The right screw has the same shape as the left screw. A left drive wheel is mounted on the left screw, and a right drive wheel is mounted on the right screw. The timing belt transmission is located between the left drive wheel and the right drive wheel.

5. A pickling apparatus for seamless tubes according to claim 3, characterized in that: The adjustment module includes hydraulic cylinders, a left adjustment rod on the left side of the bracket, and a right adjustment rod on the right side. The fixing plate is fixedly connected to the bracket. There are two hydraulic cylinders so that the left adjustment rod and the right adjustment rod can move up and down synchronously.

6. The pickling apparatus for seamless tubes according to claim 1, characterized in that: It also includes a partition frame that can be detachably installed in the pickling tank, the pickling tank including a reaction chamber located above the partition frame and an isolation chamber located below the partition frame, the agitator including a stirring blade located in the reaction chamber and the bottom of the stirring blade located in the isolation chamber.

7. A pickling apparatus for seamless tubes according to claim 6, characterized in that: The partition frame includes positioning plates, each of which is attached to the inner wall of the pickling tank. The partition frame also includes positioning blocks located on each positioning plate, each of which is inserted into the top of the pickling tank and bolted to the pickling tank.

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