On-line oil scraper for inner hole of cold-rolled steel pipe

Abstract

The utility model discloses a cold -rolled steel pipe inner hole on -line oil scraper is provided in the end of core rod, including the oil scraping connecting rod and the oil scraping mounting rod who sets gradually in the steel pipe operation direction, the end face of core rod is fixed with the connecting screw rod, be equipped with the connecting screw hole for the connecting screw rod screw connection on the oil scraping connecting rod, the oil scraping mounting rod is fixedly installed with the oil scraping piece, and the proximal end between the oil scraping mounting rod and the oil scraping connecting rod is fixed with the pull -hold rope belt. The utility model with the oil scraping connecting rod forms the fixed connection with the core rod, and the oil scraping piece is installed with the oil scraping mounting rod, and the soft connection is formed between the both with the pull -hold rope belt, and the machining error of the connecting screw rod is avoided when being fixed on the core rod, and the self -adaptation steel pipe bending change is formed and is used, the machining precision influence is avoided, the steel pipe bending degree influence is reduced, the ability that the oil scraping piece keeps in the steel pipe inner hole center position carries out the comprehensive oil scraping all the time, and the oil scraping effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary facilities for cold rolling of steel pipes, and in particular to an online oil scraper for the inner hole of cold rolled steel pipes. Background Technology

[0002] During the cold rolling process of steel pipes, lubricating oil is used both inside and outside to promote smooth and uniform rolling. After rolling, a large amount of lubricating oil remains inside and outside the steel pipe, especially in the inner hole, which needs to be cleaned. The conventional method is to place the rolled steel pipe at an angle, allowing the lubricating oil to flow out from the lower end of the pipe. However, this method is time-consuming and leaves a large amount of residual lubricating oil. During the subsequent annealing process, the residual lubricating oil will generate fumes due to the high temperature, resulting in both resource waste and environmental pollution.

[0003] Currently, there are methods for scraping oil from the inner bore of steel pipes during the rolling process, performing real-time oil removal on the steel pipes passing through the rolls. Examples include the utility model patent "CN210386981U" entitled "An Inner Diameter Oil Remover for Cold-Rolled Steel Pipes" and the invention patent application "CN105057370A" entitled "An Inner Wall Oil Removal Device for Cold-Rolled Steel Pipes." These methods involve fixing a connecting rod at the end of a mandrel, with an oil scraper mounted on the connecting rod to scrape oil from the inner bore. However, in practical use, it has been found that the connecting rod and mandrel are generally connected by threads or direct welding. Achieving high precision in both threaded hole machining and welding is difficult, making it hard to achieve good coaxiality between the connecting rod and mandrel after fixing. This causes the oil scraper to become skewed. Combined with the potential bending of the steel pipe itself, this results in significant skewed scraping of the inner bore, leading to unsatisfactory oil scraping results. Therefore, further improvements to the oil scraping structure are needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an online oil scraper for the inner hole of cold-rolled steel pipe that avoids the influence of processing accuracy, reduces the influence of steel pipe bending, and improves the oil scraping effect.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an online oil scraper for the inner hole of a cold-rolled steel pipe, which is set at the end of a mandrel and includes an oil scraping connecting rod and an oil scraping mounting rod arranged sequentially along the running direction of the steel pipe. A connecting screw is fixedly provided on the end face of the mandrel, and a connecting screw hole for threaded connection of the connecting screw is provided on the oil scraping connecting rod. An oil scraping blade is fixedly installed on the oil scraping mounting rod, and a pulling rope is fixedly connected between the near end of the oil scraping mounting rod and the oil scraping connecting rod.

[0006] As a preferred technical solution, the near ends of the oil scraper connecting rod and the oil scraper mounting rod are respectively provided with rope connection holes for threading the corresponding ends of the pulling rope, and radial clamping screws for pressing the corresponding ends of the pulling rope are installed on the hole walls of the rope connection holes.

[0007] As a preferred technical solution, the end face of the oil scraper mounting rod away from the oil scraper connecting rod is provided with a mounting screw hole, a mounting bolt is fixedly installed in the mounting screw hole, the oil scraper blade is inserted through the mounting bolt, and the mounting bolt is configured to press the oil scraper blade tightly.

[0008] As a preferred technical solution, the connecting screw is welded to the mandrel.

[0009] As a preferred technical solution, the holding rope includes a steel wire rope.

[0010] By adopting the above technical solution, the online oil scraper for the inner hole of cold-rolled steel pipe, located at the end of the mandrel, includes an oil scraping connecting rod and an oil scraping mounting rod arranged sequentially along the running direction of the steel pipe. A connecting screw is fixedly provided on the end face of the mandrel, and a connecting screw hole for threaded connection of the connecting screw is provided on the oil scraping connecting rod. An oil scraping blade is fixedly installed on the oil scraping mounting rod, and a holding rope is fixedly connected between the near end of the oil scraping mounting rod and the oil scraping connecting rod. This utility model forms a fixed connection between the oil scraping connecting rod and the mandrel, and the oil scraping blade is installed on the oil scraping mounting rod. The two are connected by a holding rope to form a flexible connection. This flexible connection avoids the processing error when the connecting screw is fixed on the mandrel, and forms an adaptive system for use when the steel pipe bends, avoiding the influence of processing accuracy, reducing the influence of steel pipe bending, and ensuring that the oil scraping blade remains in the center position of the inner hole of the steel pipe throughout the process for comprehensive oil scraping, thus improving the oil scraping effect. Attached Figure Description

[0011] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0013] In the diagram: 1-Mandrel; 2-Oil scraper connecting rod; 21-Connecting screw hole; 3-Oil scraper mounting rod; 31-Mounting screw hole; 32-Mounting bolt; 4-Connecting screw; 5-Oil scraper blade; 6-Holding rope; 61-Rope connecting hole; 62-Radial clamping screw; 9-Steel pipe. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0015] like Figure 1 As shown, an online oil scraper for the inner bore of a cold-rolled steel pipe is located at the end of the mandrel 1. When the steel pipe 9 passes through, the oil scraper is inside the pipe 9. This oil scraper includes an oil scraping connecting rod 2 and an oil scraping mounting rod 3 arranged sequentially along the running direction of the steel pipe 9. A connecting screw 4 is fixedly provided on the end face of the mandrel 1. The oil scraping connecting rod 2 has a connecting screw hole 21 for threaded connection with the connecting screw 4, thus forming a fixed connection between the oil scraping connecting rod 2 and the mandrel 1. In actual installation, an elastic washer can be added between the oil scraping connecting rod 2 and the mandrel 1 to enhance the stability of the connection between the oil scraping connecting rod 2 and the connecting screw 4.

[0016] An oil scraper 5 is fixedly installed on the oil scraper mounting rod 3. The outer circumferential surface of the oil scraper 5 is in close contact with the inner wall of the steel pipe 9. During the movement of the steel pipe 9, the oil scraper 5 passively scrapes off the oil inside the inner hole of the steel pipe 9. Of course, the oil scraper 5 is made of a soft material, such as silicone, and its outer diameter is preferably slightly larger than the inner diameter of the steel pipe 9 to ensure a good oil scraping effect.

[0017] In this embodiment, the oil scraper mounting rod 3 has a mounting screw hole 31 on its end face away from the oil scraper connecting rod 2. A mounting bolt 32 is fixedly installed in the mounting screw hole 31, and the oil scraper blade 5 is threaded through the mounting bolt 32, with the mounting bolt 32 pressing against the oil scraper blade 5. This structure is simple to assemble and disassemble, facilitating the replacement of the oil scraper blade 5 with the required size. Of course, it is preferable to add flat washers between the oil scraper blade 5 and the oil scraper mounting rod 3, and between the oil scraper blade 5 and the head of the mounting bolt 32, to ensure the pressing effect of the mounting bolt 32.

[0018] A tension rope 6 is fixedly connected between the near end of the oil scraping mounting rod 3 and the oil scraping connecting rod 2. This tension rope 6 forms a flexible connection, allowing the oil scraper 5 to continuously and passively scrape oil from the inner hole of the steel pipe 9 during cold rolling. This avoids errors in the fixed connection processing at the connecting screw 4 and adapts to the bending changes of the steel pipe 9, avoiding the impact of processing accuracy and reducing the influence of the bending degree of the steel pipe 9. The oil scraper 5 maintains its position at the center of the inner hole of the steel pipe 9 throughout the process, improving the oil scraping effect. Furthermore, if the mandrel 1 is broken or damaged, the threaded connection between the oil scraping connecting rod 2 and the connecting screw 4 can be disconnected, and the mandrel 5 can be reinstalled on a new mandrel 1, resulting in high reusability. The tension rope 6 includes a steel wire rope, but other flexible shafts, tension straps, etc., can also be used with equivalent effects, all within the protection range of the tension rope 6.

[0019] Based on the aforementioned effect of the flexible connection in mitigating machining errors in fixing the connecting screw 4, the connecting screw 4 is preferably welded to the mandrel 1, making the fixing connection of the connecting screw 4 simple and easy to operate. In this case, the connecting screw 4 can be a full screw structure, or it can be a bolt head welded to the mandrel 1, with its threaded portion forming the connecting screw 4. This embodiment illustrates the latter. Of course, machining a threaded hole on the mandrel 1 and connecting the connecting screw 4 to it via the thread to form a fixed connection should also be within the protection range of the fixing method of the connecting screw 4.

[0020] In this embodiment, the oil scraper connecting rod 2 and the oil scraper mounting rod 3 are respectively provided with rope connection holes 61 on their proximal ends for threading the corresponding ends of the holding rope 6. Radial clamping screws 62 are installed on the wall of the rope connection holes 61 for pressing the corresponding ends of the holding rope 6. Through threading and tightening with the radial clamping screws 62, a fixed connection is formed between the holding rope 6 and the oil scraper connecting rod 2 and the oil scraper mounting rod 3. Based on this threading structure, and the fact that the oil scraper connecting rod 2 has a connecting screw hole 21 and the oil scraper mounting rod 3 has a mounting screw hole 31, both the oil scraper connecting rod 2 and the oil scraper mounting rod 3 are preferably made of tubular material. The inner wall of the end of the oil scraper connecting rod 2 closest to the mandrel 1 is threaded to form the connecting screw hole 21, and the inner wall of the section of the oil scraper mounting rod 3 furthest from the oil scraper connecting rod 2 is threaded to form the mounting screw hole 31.

[0021] In this embodiment, the oil scraping connecting rod 2 forms a fixed connection with the core rod 1, and the oil scraping blade 5 is installed by the oil scraping mounting rod 3. The two are connected by a tension rope 6 to form a flexible connection. This flexible connection avoids the influence of processing accuracy, reduces the influence of the bending of the steel pipe 9, and improves the oil scraping effect.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An online oil scraper for the inner bore of a cold-rolled steel pipe, disposed at the end of a mandrel, characterized in that: The device includes an oil scraping connecting rod and an oil scraping mounting rod arranged sequentially along the running direction of the steel pipe. A connecting screw is fixedly provided on the end face of the mandrel, and a connecting screw hole for threaded connection of the connecting screw is provided on the oil scraping connecting rod. An oil scraping blade is fixedly installed on the oil scraping mounting rod, and a pulling rope is fixedly connected between the near end of the oil scraping mounting rod and the oil scraping connecting rod.

2. The online oil scraper for the inner bore of cold-rolled steel pipe as described in claim 1, characterized in that: The oil scraper connecting rod and the oil scraper mounting rod are respectively provided with rope connection holes for the corresponding ends of the pulling rope to be inserted on their proximal ends, and radial clamping screws for clamping the corresponding ends of the pulling rope are installed on the hole walls of the rope connection holes.

3. The online oil scraper for the inner bore of cold-rolled steel pipe as described in claim 1, characterized in that: The oil scraper mounting rod has a mounting screw hole on its end face away from the oil scraper connecting rod. A mounting bolt is fixedly installed in the mounting screw hole, and the oil scraper blade is inserted through the mounting bolt. The mounting bolt is used to press the oil scraper blade tightly.

4. The online oil scraper for the inner bore of cold-rolled steel pipe as described in claim 1, characterized in that: The connecting screw is welded to the mandrel.

5. The online oil scraper for the inner bore of cold-rolled steel pipe as described in claim 1, characterized in that: The holding rope includes a steel wire rope.

Images