A scale removing device for hot rolling of steel pipes

Abstract

The application provides a scale removing device for hot rolling of a steel pipe, and relates to the technical field of steel pipe production; a set of symmetrical bases are arranged, a pair of impurity removing assemblies are arranged on the two bases, the two impurity removing assemblies are oppositely arranged, the impurity removing assembly comprises a base, an electric push rod, a connecting seat and a scraper, the electric push rod is fixedly arranged on the base, the connecting seat is fixedly arranged on the telescopic end of the electric push rod, one side of the scraper is connected with the connecting seat, and the side of the scraper away from the connecting seat is of an arc structure; the arc structures of the two impurity removing assemblies are adjusted through the telescopic adjustment of the electric push rods, so that the inner arc surfaces of the arc structures are attached to the outer surfaces of the steel pipes to be removed of the scale; the device can be directly integrated at the key node of a hot rolling production line, the scale can be removed in real time on line, the iron oxide is not easily embedded into the surface of the steel pipe to form defects such as depressions and pockmarks in the subsequent rolling process, the surface quality of the seamless steel pipe product is improved, and the product qualification rate is improved.

Description

Technical Field

[0001] This application relates to the field of steel pipe production technology, and more specifically, to a device for removing oxide scale from hot-rolled steel pipes. Background Technology

[0002] In the field of hot rolling production of seamless steel pipes, the billet needs to be heated to a plastic deformation state in a heating furnace, and then gradually rolled into shape through a piercing mill, rolling mill, sizing mill and cooling finishing mill, and finally obtain a seamless steel pipe that meets the specifications.

[0003] However, during the heating furnace and subsequent transport of the billet, the surface metal comes into full contact with air and oxidizing gases in the furnace, easily leading to an oxidation reaction that generates an oxide layer (commonly known as "oxide scale"). Especially after the piercing process, the surface of the blank will continue to generate new oxide scale due to secondary heating or contact with oxygen in the air. If this iron oxide is not removed in a timely and effective manner, it can easily embed into the surface of the steel pipe during subsequent rolling processes, forming defects such as pits and depressions, seriously affecting the surface quality of the seamless steel pipe and thus reducing the product qualification rate. Summary of the Invention

[0004] The purpose of this application is to provide a scale removal device for hot rolling of steel pipes, which can solve the technical problems mentioned in the background art.

[0005] This application provides a device for removing oxide scale from hot-rolled steel pipes, comprising a set of symmetrically arranged bases, each of which is equipped with a cleaning component. The two cleaning components are arranged opposite to each other. Each cleaning component includes a base, an electric push rod, a connecting seat, and a scraper. The electric push rod is fixed to the base, and the connecting seat is fixed to the telescopic end of the electric push rod. One side of the scraper is connected to the connecting seat, and the side of the scraper away from the connecting seat has an arc-shaped structure. The scrapers of the two cleaning components can be adjusted by the telescopic movement of the electric push rod so that the inner arc surface of the arc-shaped structure can fit against the outer surface of the steel pipe to which the oxide scale is to be removed.

[0006] Furthermore, the connecting seat is provided with a buffer assembly, and the scraper is connected to the connecting seat through the buffer assembly. The buffer assembly includes a connecting plate, two connecting rods symmetrically fixed on one side of the connecting plate, and a buffer spring sleeved on the connecting rod. The connecting seat is provided with a connecting through hole adapted to the connecting rod, and the connecting rod movably passes through the connecting through hole. The buffer spring is located between the connecting plate and the connecting seat. The end of the connecting rod away from the connecting plate is provided with an anti-detachment part, and the scraper is disposed on the connecting plate.

[0007] Furthermore, the scraper is detachably connected to the connecting plate.

[0008] Furthermore, a threaded mounting rod is fixedly provided on the side of the scraper away from the arc surface, and the connecting plate is provided with a mounting through hole adapted to the threaded mounting rod. The end of the threaded mounting rod away from the scraper passes through the mounting through hole and is threadedly connected to a mounting nut.

[0009] Furthermore, there are two threaded mounting rods, which are arranged symmetrically.

[0010] Furthermore, the base is provided with a guide rod, and the connecting seat is provided with a guide hole that matches the guide rod, and the guide rod moves through the guide hole.

[0011] Furthermore, the base is provided with a fixing through hole.

[0012] The beneficial effects of this utility model are:

[0013] This invention can be directly integrated into key nodes of a hot rolling production line to achieve online real-time removal of oxide scale, avoiding defects such as pits and depressions caused by iron oxide easily embedding into the surface of the steel pipe during subsequent rolling processes, thereby improving the surface quality of seamless steel pipe products and increasing the product qualification rate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0016] Figure 2 These are front views of some embodiments of this application;

[0017] The reference numerals in the attached figures are as follows:

[0018] 1. Base; 2. Impurity removal assembly; 21. Electric push rod; 22. Connecting seat; 23. Scraper; 3. Buffer assembly; 31. Connecting plate; 32. Connecting rod; 321. Anti-detachment part; 33. Buffer spring; 4. Threaded mounting rod; 5. Mounting nut; 6. Guide rod; 7. Receiving trough. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application 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 this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation

[0025] like Figure 1and Figure 2 As shown, this application provides a scale removal device for hot-rolled steel pipes, including a set of symmetrically arranged bases 1, each base 1 having a cleaning component 2. The two cleaning components 2 are arranged opposite to each other. Each cleaning component 2 includes a base, an electric push rod 21, a connecting seat 22, and a scraper 23. The electric push rod 21 is fixed on the base, and the connecting seat 22 is fixed to the telescopic end of the electric push rod 21. One side of the scraper 23 is connected to the connecting seat 22, and the side of the scraper 23 away from the connecting seat 22 has an arc-shaped structure. The scraper 23 of the two cleaning components 2 can be adjusted by the telescopic movement of the electric push rod 21 so that the inner arc surface of the arc-shaped structure can fit against the outer surface of the steel pipe to be descaled. In use, the two bases are symmetrically fixed on both sides of the steel pipe conveying roller. When the steel pipe to be descaled (such as hot-rolled steel pipe) is being cleaned, the scraper 23 is adjusted by the telescopic movement of the electric push rod 21. When the perforated rough tube is conveyed along the steel pipe conveying roller, the electric push rods 21 in the two sets of impurity removal components 2 are started synchronously. The telescopic end of the electric push rod 21 drives the connecting seat 22 to move towards the steel pipe, thereby bringing the scraper 23 close to the steel pipe and making the arc surface of the scraper 23 fit tightly and appropriately with the outer surface of the steel pipe. During the continuous conveying of the steel pipe, the fitted arc scraper 23 can form a continuous scraping force on the oxide scale on the outer surface of the steel pipe, thereby peeling off the oxide scale on the surface of the steel pipe and completing the oxide scale removal operation. This device can be directly integrated into the key nodes of the hot rolling production line to realize online real-time removal of oxide scale, avoid the easy embedding of iron oxide into the surface of the steel pipe in subsequent rolling processes to form defects such as pits and pits, improve the surface quality of seamless steel pipe products, and increase the product qualification rate.

[0026] like Figure 1 and Figure 2As shown, the connecting seat 22 is provided with a buffer assembly 3, and the scraper 23 is connected to the connecting seat 22 through the buffer assembly 3. The buffer assembly 3 includes a connecting plate 31, two connecting rods 32 symmetrically fixed on one side of the connecting plate 31, and a buffer spring 33 sleeved on the connecting rods 32. The connecting seat 22 is provided with a connecting through hole adapted to the connecting rods 32, and the connecting rods 32 move through the connecting through hole. The buffer spring 33 is located between the connecting plate 31 and the connecting seat 22. The end of the connecting rod 32 away from the connecting plate 31 is provided with an anti-detachment part 321, and the scraper 23 is provided on the connecting plate 31. Specifically, the electric push rod 21 is externally connected to a PLC controller, and the PLC controller controls the operation of the electric push rod 21. Initially, the buffer spring... Spring 33 is in a pre-compressed state, and anti-detachment part 321 abuts against connecting seat 22. When electric push rod 21 drives connecting seat 22 to move towards steel pipe, causing scraper 23 to contact the outer surface of steel pipe and generate scraping force, if there is oxide scale protrusion on the surface of steel pipe, scraper 23 will be subjected to reverse force and transmitted to connecting plate 31, causing connecting plate 31 to move closer to connecting seat 22. At this time, buffer spring 33 is compressed and generates reverse elastic force, which can offset part of the reverse impact force. At the same time, connecting plate 31 is allowed to drive scraper 23 to make a small displacement along the axis of connecting rod 32, realizing adaptive adjustment of the contact pressure between scraper 23 and steel pipe surface, which can effectively resolve the rigid impact between scraper 23 and steel pipe surface.

[0027] like Figure 1 and Figure 2 As shown, the scraper 23 and the connecting plate 31 are detachably connected. When the scraper 23 needs to be replaced due to wear or damage, it is not necessary to replace the entire assembly of the scraper 23 and the connecting plate 31. Only the scraper 23 needs to be replaced separately, which reduces the waste of parts. At the same time, scrapers 23 of different specifications and materials can be replaced according to different working conditions to meet the needs of steel pipes of different specifications.

[0028] like Figure 1 and Figure 2 As shown, a threaded mounting rod 4 is fixedly provided on the side of the scraper 23 away from the arc surface. The connecting plate 31 is provided with a mounting through hole adapted to the threaded mounting rod 4. The end of the threaded mounting rod 4 away from the scraper 23 passes through the mounting through hole and is threadedly connected to the mounting nut 5. During assembly, the threaded mounting rod 4 on the scraper 23 is inserted into the mounting through hole from one side of the connecting plate 31, so that the scraper 23 and the connecting plate 31 are fitted and aligned. Then, the mounting nut 5 is screwed on the end of the threaded mounting rod 4 that passes out of the connecting plate 31, so that the scraper 23 and the connecting plate 31 are tightly clamped together to form a stable fixed connection. When disassembly is required, simply rotate the mounting nut 5 in the opposite direction to disengage it from the threaded mounting rod 4, and the scraper 23 can be separated from the connecting plate 31 to complete the disassembly and assembly operation. The disassembly and assembly are simple.

[0029] like Figure 1 and Figure 2As shown, there are two threaded mounting rods 4, which are symmetrically arranged. The symmetrically arranged threaded mounting rods 4 and the mounting through holes can serve as clear alignment references. During assembly, precise alignment can be quickly achieved without repeatedly adjusting the position of the scraper 23, reducing the difficulty of operation and improving the reliability of the connection.

[0030] like Figure 1 and Figure 2 As shown, the base 1 is provided with a guide rod 6, and the connecting seat 22 is provided with a guide hole that matches the guide rod 6. The guide rod 6 moves through the guide hole. Through the cooperation between the guide rod 6 and the guide hole, the connecting seat 22 moves more stably when driven by the electric push rod 21.

[0031] like Figure 1 and Figure 2 As shown, the base 21 is provided with a fixing through hole; by cooperating with the existing ground anchor bolts through the fixing through hole, the base 21 can be stably fixed on the ground.

[0032] To further improve the surface quality of seamless steel pipes, this device can be combined with high-pressure water spraying treatment: a ring-shaped high-pressure spray pipe is installed in the subsequent production line, with multiple high-pressure nozzles evenly distributed on its inner side, and connected to a high-pressure water input source through a pipeline. The seamless steel pipes treated by this device are then reprocessed after high-pressure rinsing to further improve the surface quality of the finished product.

[0033] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for removing oxide scale from hot-rolled steel pipes, characterized in that: The device includes a set of symmetrically arranged bases, each of which is equipped with a cleaning component. The two cleaning components are arranged opposite to each other. Each cleaning component includes a base, an electric push rod, a connecting seat, and a scraper. The electric push rod is fixed to the base, and the connecting seat is fixed to the telescopic end of the electric push rod. One side of the scraper is connected to the connecting seat, and the side of the scraper away from the connecting seat has an arc-shaped structure. The scrapers of the two cleaning components can be adjusted by the telescopic movement of the electric push rod so that the inner arc surface of the arc-shaped structure can fit against the outer surface of the steel pipe to be descaled.

2. The oxide scale removal device for hot rolling of steel pipes according to claim 1, characterized in that: The connecting seat is provided with a buffer assembly. The scraper is connected to the connecting seat through the buffer assembly. The buffer assembly includes a connecting plate, two connecting rods symmetrically fixed on one side of the connecting plate, and a buffer spring sleeved on the connecting rod. The connecting seat is provided with a connecting through hole adapted to the connecting rod. The connecting rod moves through the connecting through hole. The buffer spring is located between the connecting plate and the connecting seat. The end of the connecting rod away from the connecting plate is provided with an anti-detachment part. The scraper is disposed on the connecting plate.

3. The oxide scale removal device for hot rolling of steel pipes according to claim 2, characterized in that: The scraper is detachably connected to the connecting plate.

4. The oxide scale removal device for hot rolling of steel pipes according to claim 3, characterized in that: A threaded mounting rod is fixed on the side of the scraper away from the arc surface. The connecting plate is provided with a mounting through hole adapted to the threaded mounting rod. The end of the threaded mounting rod away from the scraper passes through the mounting through hole and is threadedly connected to a mounting nut.

5. The oxide scale removal device for hot rolling of steel pipes according to claim 4, characterized in that: There are two threaded mounting rods, which are arranged symmetrically.

6. The oxide scale removal device for hot rolling of steel pipes according to claim 1, characterized in that: The base is provided with a guide rod, and the connecting seat is provided with a guide hole that matches the guide rod, and the guide rod moves through the guide hole.

7. The oxide scale removal device for hot rolling of steel pipes according to claim 1, characterized in that: The base is provided with a fixing through hole.

Images