A pipe rolling set and pipe production line thereof

Abstract

The utility model relates to metal rolling equipment technical field, specifically disclose a pipeline rolling set and its pipeline production line. In the set piece along the processing path of pipeline is sequentially provided with entry chuck, preheating equipment, rolling equipment and exit chuck, the above-mentioned component is installed on the base, wherein at least preheating equipment is fixedly installed on the base, and rolling equipment is movably installed on the base through the drive part, the heating part, the rolling part and the heat preservation part are sequentially arranged in the rolling equipment along the processing path, wherein the reciprocating interval between the heating part and the preheating equipment is 100~400mm. The set piece realizes the rapid heating to the pipe blank through the arrangement preheating equipment and heating part, makes it when participating in the rolling work to have already warmed up to the temperature of easy deformation, is favorable to the rolling part to carry out the radial compression and axial extension to the pipe blank and processes the required pipeline fastly, simultaneously through the arrangement heat preservation part, the probability that the pipe material is cracked after rolling because of rapid cooling and so on happens is reduced.

Description

Technical Field

[0001] This utility model relates to the field of metal rolling equipment technology, specifically to a device for rolling metal pipes and a metal pipe production line equipped with the device. Background Technology

[0002] Pipe rolling equipment is mainly used to plastically deform tube blanks to obtain the required pipes. It mainly utilizes components such as rolls to cause radial compression and axial extension of the tube blank, thereby achieving the purposes of wall reduction, sizing, and improving roundness and straightness.

[0003] Patent application number 201510949068.9 discloses a cold rolling mill, which includes a frame, rolls, bearing housings, and bearings disposed between the rolls and bearing housings. The rolls include an upper roll and a lower roll; the bearing housings include an upper bearing housing and a lower bearing housing. The frame has a straight groove, the lower bearing housing is fixed to the bottom of the straight groove, and the upper bearing housing is connected to the frame via an adjusting mechanism, allowing it to slide within the straight groove. The upper and lower rolls are connected to the frame via the upper and lower bearing housings, respectively. The wheelbase between the upper and lower rolls is adjustable by sliding the upper bearing housing. Both the upper and lower bearing housings have oiling holes, one end of which is connected to an oiling pipe for lubricating the bearings, and the other end of the oiling pipe is connected to an oiling distributor. This cold rolling mill can perform cold rolling processing on tube blanks to obtain pipes of the required specifications.

[0004] However, in the processing of certain metal pipes, the physical properties of the metal materials themselves limit the ability of cold rolling mills to produce pipes of the required specifications. For example, in the manufacturing process of titanium pipes, the high strength and difficulty in stretching and deforming of titanium make it difficult for cold rolling mills to efficiently complete the production of titanium pipes. Therefore, there is an urgent need for a rolling mill capable of efficiently processing various types of metal pipes. Utility Model Content

[0005] One of the objectives of this invention is to provide a pipe rolling equipment capable of processing pipe blanks made of high-strength metal materials. The second objective of this utility model is to provide a pipeline production line equipped with the aforementioned pipeline rolling equipment, which enables the manufacturing of pipelines made of high-strength metal materials.

[0006] This utility model is achieved through the following technical solution: In a first aspect, this utility model provides a pipe rolling assembly, wherein an inlet chuck, a preheating device, a rolling device, and an outlet chuck are sequentially arranged along the processing path of the pipe; the above components are mounted on a base, wherein at least the preheating device is fixedly mounted on the base, and the rolling device is movably mounted on the base via a drive unit, so that the drive unit drives the rolling device to reciprocate along the processing path, away from or near the preheating device; a heating unit, a rolling unit, and a heat preservation unit are sequentially arranged inside the rolling device along the processing path; wherein the reciprocating distance between the heating unit and the preheating device is 100~400mm.

[0007] As a further improvement of this utility model, the preheating equipment and / or heating section and / or insulation section include a temperature detection device, a heating chamber that allows pipes to pass through, and several sets of heat output sections are evenly distributed on the inner wall surface of the heating chamber.

[0008] As a further improvement of this utility model, several rows of heat output sections are evenly distributed on the inner wall surface, and three sets of heat output sections are evenly distributed along the circumference in each row.

[0009] As a further improvement of this utility model, in the preheating equipment and / or heating section and / or heat preservation section, the heat output section is a flame nozzle, and it also includes an ignition section, a gas delivery section, a flame detection section and a gas control valve, wherein the gas delivery section is connected to an external gas supply device and the flame nozzle, and the gas control valve is used to control the output of gas.

[0010] As a further improvement of this utility model, the diameter of the flame nozzle is 12~18mm.

[0011] As a further improvement of this utility model, the temperature detection device adopts an infrared temperature measuring device, which is set at the feed inlet of the preheating equipment and / or the heating section and / or the heat preservation section respectively.

[0012] As a further improvement of this utility model, the preheating equipment and / or heating section and / or insulation section also include a water-cooling kit, which is connected to an external water circulation device; the water-cooling kit is used at least to cool the inner wall surface.

[0013] As a further improvement of this utility model, both the inlet chuck and the outlet chuck include at least a rotary drum for accommodating the pipe and a drive device for driving the rotary drum to rotate in a circular motion.

[0014] As a further improvement of this utility model, the distance between the exit chuck and the inlet chuck is 1700~1800mm.

[0015] Secondly, this utility model provides a pipeline production line in which any of the above-mentioned pipeline rolling kits are arranged.

[0016] The beneficial effects of this utility model include: In the pipe rolling equipment, the preheating equipment and heating section are arranged to achieve rapid heating of the tube blank, so that it has been heated to a temperature that is easy to deform when participating in the rolling process. This facilitates the rapid radial compression and axial extension of the tube blank by the rolling section. At the same time, the insulation section is arranged after the rolling section to reduce the probability of rapid cooling and cracking of the rolled pipe. In this way, high-strength pipes are processed with high efficiency while ensuring that the performance of the processed pipes meets the requirements.

[0017] The rolling equipment is movably mounted on the base and can reciprocate between the preheating equipment and the outlet chuck. The inlet and outlet chucks continuously deliver tube blanks to the rolling section. With this structure, the pipe rolling equipment has the ability to continuously process ultra-long pipes. Furthermore, when the rolling section reciprocates to roll the pipe, it can reduce the deformation of a single rolling operation and avoid pipe cracking. At the same time, by repeatedly rolling multiple times to obtain the required specifications, the pipe rolling equipment can achieve precise control of the deformation of the pipe wall, thereby improving the pipe processing qualification rate.

[0018] By controlling the reciprocating distance between the heating section and the preheating equipment, the rolling process is ensured to proceed smoothly. This avoids the mutual interference caused by the preheating equipment and the heating section being too close, which could lead to uneven heating of the tube blank. It also avoids the rapid cooling of the pipe placed between the preheating equipment and the heating section due to the distance being too far, which could result in the pipe material not being heated to the required temperature during subsequent rolling. In other words, by controlling the reciprocating distance, this invention ensures that the heating work of the preheating equipment and the heating section on the tube blank is coordinated while avoiding uneven heating and mutual interference. Attached Figure Description

[0019] The following figures are provided in conjunction with preferred embodiments of the present invention to aid in understanding the purpose and advantages of the present invention, wherein: Figure 1 This is a cross-sectional view of the pipe rolling assembly structure; Figure 2 This is a schematic diagram of the heating working part in a preheating device, heating section, or insulation section.

[0020] Appendix Figure 1 To clearly show the internal structure of each component and the positional relationship between them, the base and drive unit are omitted, which does not affect the scope of protection of the claims. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Example 1:

[0023] This embodiment provides a pipe rolling kit, such as Figure 1 As shown, an inlet chuck 1, a preheating device 2, a rolling device 3, and an outlet chuck 4 are sequentially arranged along the processing path of the pipeline. Within the rolling device 3, a heating section 301, a rolling section 302, and a heat preservation section 303 are also sequentially arranged along the processing path. For example, in this embodiment, the rolling section 302 is equipped with two sets of rollers. The tube blank to be processed is rolled by the two sets of rollers to form a pipeline of the required specifications. Any other pipeline rolling assembly is applicable. All the above components are mounted on a base. In this embodiment, the inlet chuck 1, the outlet chuck 4, and the preheating device 2 are fixedly mounted on the base, while the rolling device 3 is movably mounted on the base via a drive unit. For example, the drive unit can be composed of components such as a hydraulic cylinder; any other common rolling device drive unit is applicable. This drive unit can drive the rolling device 3 to reciprocate along the processing path, away from or near the preheating device 2, to achieve the desired shape. Figure 1 Taking the display perspective as an example, the rolling mill 3 reciprocates in the left-right direction between the preheating equipment 2 and the exit chuck 4. The reciprocating distance L1 between the heating unit 301 and the preheating equipment 2 is 100~400mm. That is, when the rolling mill 3 carrying the heating unit 301 moves to the closest point to the preheating equipment 2, the distance between the two is 100mm, and when the rolling mill 3 carrying the heating unit 301 moves to the closest point to the exit chuck 4, the distance between the heating unit 301 and the preheating equipment 2 is 400mm. Within this distance range, when the heating unit 301 is close to the preheating equipment 2, the mutual interference of the heating work on the tube blank is avoided, thus preventing uneven heating of the tube blank. At the same time, when the heating unit 301 is close to the exit chuck 4, the rapid cooling of the pipe placed between the preheating equipment 2 and the heating unit 301, and the weakening of the preheating effect on the tube blank, are avoided due to the excessive distance between the preheating equipment 2 and the heating unit 301.

[0024] In summary, this pipe rolling kit enables efficient processing of pipes made of high-strength metal materials. In this embodiment, it is exemplarily used for processing titanium pipes. In actual use, the titanium billet temperature is typically raised to approximately 300°C in the preheating equipment 2 before being advanced. Then, the titanium billet temperature is raised to 550°C in the heating section 301 before rolling begins. After rolling, the pipe temperature is maintained at approximately 250°C in the insulation section 303 to prevent rapid temperature drop and cracking of the titanium pipe, thus achieving the processing of high-strength pipes.

[0025] Preferably, in this embodiment, the preheating device 2, the heating section 301, and the heat preservation section 303 all include temperature detection devices, and as shown in the figure... Figures 1-2 Each of the shown structures has a heating chamber 5 that allows pipes to pass through, and several sets of heat output sections 6 are evenly distributed on the inner wall surface of the heating chamber 5. For example, in this embodiment, a total of sixty sets of heat output sections 6 are distributed on the inner wall surface.

[0026] More preferably, the sixty heat output sections are evenly arranged in twenty rows on the inner wall surface, and within each row, as shown... Figures 1-2 As shown, three sets of heat output sections 6 are evenly arranged along the circumference to ensure that the heat output sections 6 can heat the entire wall surface of the tube blank or pipe from all directions simultaneously within the heating chamber 5, thereby ensuring uniform heating of the tube blank or pipe.

[0027] More preferably, in the preheating device 2, the heating section 301, and the heat preservation section 303, the heat output section 6 is a flame nozzle, and each section also includes an ignition section, a gas delivery section, a flame detection section, and a gas control valve. The gas delivery section connects to an external gas supply device and the flame nozzle to provide the required gas to the heat output section 6; the ignition section ignites the heating flame upon startup; the flame detection section detects the ignition status of the heating flame to determine whether ignition was successful and the size of the flame; the gas control valve controls the output of the gas, thereby controlling the flame size. For example, in this embodiment, the gas used is propane gas, and the gas control valve mainly controls the input flow rate of the propane gas to control the flame size.

[0028] More preferably, the diameter of the flame nozzle is 15mm. At this diameter, the flame kinetic energy and heat conduction are balanced, which can heat both the inside and outside of the pipe wall and avoid defects such as thermal stress cracks on the pipe wall.

[0029] Preferably, the temperature detection equipment adopts an infrared temperature measuring device, which is set at the feed inlet of each of the preheating equipment 2, the heating section 301 and the insulation section 303. This enables relatively accurate detection of the temperature of the heating chamber 5 of each heating section 301, helps the user understand the progress of preheating, heating and insulation work, and facilitates the smooth progress of pipeline processing work.

[0030] Preferably, the preheating device 2, the heating part 301 and the heat preservation part 303 also include a water cooling kit, which is connected to an external water circulation device. The water cooling kit is used at least to cool the inner wall surface to avoid damage to each heating part 301 due to excessive heating temperature. At the same time, the user can indirectly understand the heating status of each heating part 301 by the water temperature of the water cooling kit, and assist in judging the heating temperature of the tube blank or tube.

[0031] Preferably, both the inlet chuck 1 and the outlet chuck 4 include at least a rotating drum for accommodating the pipe and a drive device for driving the rotating drum to rotate in a circular motion. This allows both the inlet chuck 1 and the outlet chuck 4 to actively drive the pipe blank or pipe to rotate. With this structure, when rotating pipe mandrels of long dimensions and specifications, each chuck can provide the necessary driving force, effectively preventing the pipe mandrel from twisting, slipping, or vibrating between the chucks, thus ensuring high overall precision in pipe processing.

[0032] More preferably, the distance between the outlet chuck 4 and the inlet chuck 1 is 1750 mm. At this distance, the outlet and inlet chucks 1 can provide sufficient driving torque to the tube blank or pipe fixed between them, so as to ensure that the part of the tube blank or pipe placed on the rolling equipment 3 can rotate into position and thus complete the required rolling work. Example 2:

[0033] This embodiment provides a pipeline production line, which includes the pipeline rolling kit of Embodiment 1. In this production line, the pipe blank obtained from upstream processing is delivered to the pipeline rolling kit for processing to obtain a primary pipeline product. The primary pipeline product is then provided to downstream processes such as heat treatment and straightening.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pipe rolling kit, characterized in that, The following are arranged sequentially along the processing path of the pipeline: Inlet chuck (1), preheating equipment (2), rolling equipment (3) and outlet chuck (4); Each component is mounted on a base, wherein at least the preheating device (2) is fixedly mounted on the base, and the rolling device (3) is movably mounted on the base via a drive unit, such that the drive unit drives the rolling device (3) to reciprocate along the processing path, away from or near the preheating device (2); the rolling device (3) is provided with a heating unit (301), a rolling unit (302) and a heat preservation unit (303) arranged sequentially along the processing path; wherein the reciprocating distance (L1) between the heating unit (301) and the preheating device (2) is 100~400mm.

2. The pipe rolling kit according to claim 1, characterized in that, The preheating device (2) and / or heating section (301) and / or heat preservation section (303) include a temperature detection device and a heating chamber (5) that allows the pipe to pass through. Several sets of heat output sections (6) are evenly distributed on the inner wall surface of the heating chamber (5).

3. A pipe rolling kit according to claim 2, characterized in that, Several rows of heat output sections (6) are evenly distributed on the inner wall surface, and three sets of heat output sections (6) are evenly distributed in each row along the circumference.

4. A pipe rolling kit according to any one of claims 2 to 3, characterized in that, In the preheating device (2) and / or heating section (301) and / or heat preservation section (303), the heat output section (6) is a flame nozzle, and also includes an ignition section, a gas delivery section, a flame detection section and a gas control valve, wherein the gas delivery section is connected to an external gas supply device and the flame nozzle, and the gas control valve is used to control the output of gas.

5. A pipe rolling kit according to claim 4, characterized in that, The diameter of the flame nozzle is 12~18mm.

6. A pipe rolling kit according to claim 2, characterized in that, The temperature detection device is an infrared temperature measuring device, which is installed at the feed inlet of the preheating device (2) and / or the heating part (301) and / or the heat preservation part (303).

7. A pipe rolling kit according to claim 2, characterized in that, The preheating device (2) and / or heating section (301) and / or insulation section (303) further include a water-cooling kit, which is connected to an external water circulation device; the water-cooling kit is used at least to cool the inner wall surface.

8. A pipe rolling kit according to claim 1, characterized in that, Both the inlet chuck (1) and the outlet chuck (4) contain at least a rotary drum for accommodating the pipe and a drive device for driving the rotary drum to rotate in a circular motion.

9. A pipe rolling kit according to any one of claims 1 or 8, characterized in that, The distance between the outlet chuck (4) and the inlet chuck (1) is 1700~1800mm.

10. A pipeline production line, characterized in that, The assembly includes a pipe rolling kit as described in any one of claims 1 to 9.

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