Degreasing pretreatment device for metal pipes

Abstract

The utility model discloses a metal tubular product production equipment field's a kind of for metal tubular product's degreasing pretreatment device, including multiple roll supports and degreasing sheet supports being arranged at interval along the extension direction of discharging frame, the top of roll support is equipped with the support wheel for supporting and guiding pipe material movement, the top of degreasing sheet support is equipped with clamping plate, the middle part of clamping plate is equipped with through-hole, the axis of through-hole is coaxial with the axis of pipe material on support wheel, the degreasing sheet of being replaceable is arranged in the clamping plate, degreasing sheet center is aligned with the center of through-hole, and opening is provided at center for pipe material to pass through and closely adhere to pipe material surface. The device is arranged at pipe mill outlet, when pipe material passes through the opening of degreasing sheet, degreasing sheet can scrape most of the dirt adhered on pipe material surface, thereby reducing subsequent degreasing cleaning work, improve the cleaning efficiency of pipe material, and physical scraping does not use kerosene and other harmful substances to environment, also can not cause pollution to pipe material surface, safe and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of metal pipe production equipment, and in particular to a degreasing pretreatment device for metal pipes. Background Technology

[0002] In the cold rolling process of metal tubes, rolling lubricating oil is required to reduce wear and overheating between the rolls and the billet tube. Degreasing the outer surface of the finished tube is an essential and crucial step in the cold rolling of metal tubes. Currently, the mainstream degreasing technologies for metal tubes are immersion and injection. The immersion method uses a water-soluble alkaline degreasing agent to prepare a degreasing solution, which is then used to clean the tube by immersing it in the solution. Ultrasonic technology can be added to this process, using the instantaneous impact of shock waves to peel off the oil stains, thereby enhancing the dissolving and emulsifying effect of the degreasing agent. The injection method involves injecting the degreasing agent into the interior of the tube to degrease the inner wall.

[0003] For example, patent document CN104032322B discloses a degreasing and cleaning process for steel pipes, using kerosene as an organic solvent to clean cold-rolled lubricating oil. For small-diameter, thick-walled pipes, the compressed air purging method mentioned in this patent has poor cleaning effect and easily leaves kerosene residue. If too little kerosene is used, the cleaning effect is not obvious, and the cleaning efficiency is low. If too much kerosene is used, it becomes more difficult to clean the inner surface after cyclic rinsing, and the time required to purge the inner surface of the steel pipe with compressed air will be prolonged. Once kerosene residue appears, because kerosene is a mixture of hydrocarbons and does not contain oils or fatty acids, the alkaline water-soluble degreasing agent will not undergo a saponification reaction with the kerosene. At the same time, kerosene is insoluble in water, making kerosene removal difficult. The boiling point of kerosene is approximately 175-325℃, while the degreasing temperature in this patent does not exceed 60℃, therefore, kerosene cannot be removed by low-temperature heating. To remove kerosene, organic solvents or adsorbent materials are also required, further complicating the degreasing process and increasing processing costs. Kerosene leaks or improper handling pose significant risks to aquatic organisms and soil ecosystems, potentially causing long-term ecological damage. Patent document CN111589806B discloses a pipe degreasing device and its usage method based on ultrasonic cleaning technology, capable of ultrasonic degreasing of ultra-long pipes. However, the degreasing device is complex, with numerous intricate structures, resulting in high costs for mass production. Furthermore, existing methods for degreasing the outer surface of metal pipes require multiple degreasing tanks and clean water tanks, involving repeated, prolonged soaking and rinsing. This multi-stage, time-consuming process, coupled with the large footprint of the equipment and the time-consuming, labor-intensive repetitive cleaning, increases the risk of quality control issues related to the pipe surface. Utility Model Content

[0004] To overcome the above-mentioned shortcomings of existing degreasing and cleaning methods for metal pipes, the technical problem to be solved by this utility model is to provide a degreasing pretreatment device for metal pipes that can improve the efficiency of degreasing and cleaning.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A degreasing pretreatment device for metal pipes includes roller supports and degreasing plate supports mounted on the discharge rack of a pipe rolling mill. Multiple roller supports and degreasing plate supports are spaced apart along the extension direction of the discharge rack. The top of the roller support is provided with a support wheel for supporting and guiding the movement of the pipe. The top of the degreasing plate support is provided with a clamping plate. The clamping plate has a through hole in the middle, and the axis of the through hole is coaxial with the axis of the pipe on the support wheel. A replaceable degreasing plate is provided inside the clamping plate. The center of the degreasing plate is aligned with the center of the through hole, and an opening is provided at the center for the pipe to pass through and fit tightly against the surface of the pipe.

[0007] Furthermore, the degreasing tablet holder includes at least three, and the roller holder also includes at least three, two of which are respectively located in front of the foremost degreasing tablet holder and behind the last degreasing tablet holder, and the remaining roller holders are evenly spaced in the middle of the two roller holders.

[0008] Furthermore, the support wheel is a roller with an arc groove on its surface, the inner diameter of which matches the outer diameter of the pipe, and the pipe is placed on top of the roller and slides along the arc groove.

[0009] Furthermore, the roller bracket has two support wheels with their surfaces close together along the vertical direction, and the tube passes through the arc groove between the two support wheels.

[0010] Furthermore, the clamping plate includes a first clamping plate and a second clamping plate arranged opposite to each other, and the through holes in the middle of the two are stepped holes, with the ends of the stepped holes with larger inner diameters connected to each other to form a receiving cavity. The degreasing sheet is circular, and its periphery is clamped in the receiving cavity.

[0011] Furthermore, the first clamping plate has a base at its bottom, and the first clamping plate is fixed to the degreasing tablet bracket by bolts passing through the base. The first clamping plate and the second clamping plate are both provided with connecting holes around the through holes, and the first clamping plate and the second clamping plate are fixed together by bolts passing through the connecting holes.

[0012] Furthermore, the opening in the middle of the degreasing sheet is a cross-shaped cut, and along the extension direction of the discharge rack, the cross-shaped cuts of the degreasing sheets on each degreasing sheet support rotate 30~45° in the same direction in sequence.

[0013] The beneficial effects of this utility model are as follows: By setting multiple roller supports and degreasing plate supports on the discharge rack of the pipe rolling mill, the roller supports are used to support the pipe and guide the pipe through the opening of the degreasing plate on the degreasing plate support, thereby using the degreasing plate to scrape off most of the oil stains attached to the surface of the pipe, reducing the subsequent degreasing and cleaning work and improving the cleaning efficiency of the pipe; the entire degreasing pretreatment device has a simple structure and is easy to install, and its application is not limited by the type of pipe rolling mill. It can be used in various rolling mills that use mandrels. Moreover, the physical scraping does not use kerosene or other environmentally harmful substances, and will not cause pollution to the surface of the pipe, making it safe and environmentally friendly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is the front view of the roller bracket of this utility model;

[0016] Figure 3 This is a front view of the degreasing tablet holder of this utility model;

[0017] Figure 4 This is a cross-sectional view of the degreasing sheet holder of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the degreasing tablet of this utility model.

[0019] The markings in the diagram are as follows: 1-discharge rack, 2-roller bracket, 3-degreasing sheet bracket, 4-pipe, 5-support wheel, 6-clamping plate, 7-degreasing sheet, 51-arc groove, 61-first clamping plate, 62-second clamping plate, 63-through hole, 64-accommodating cavity, 65-base, 66-connecting hole, 71-opening. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] It should be noted that if this utility model contains directional indicators such as up, down, left, right, front, and back, these terms are used to describe the relative positional relationships between components and are not specific references to the absolute positions of the components or the relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. If this utility model contains terms related to quantity such as "many," "multiple," or "several," these terms specifically refer to two or more.

[0022] like Figure 1As shown, the present invention provides a degreasing pretreatment device for metal pipes, including roller supports 2 and degreasing plate supports 3 mounted on the discharge rack 1 of a pipe rolling mill. Multiple roller supports 2 and degreasing plate supports 3 are spaced apart along the extension direction of the discharge rack 1. The top of the roller supports 2 is provided with support wheels 5 for supporting and guiding the movement of the pipe 4. The top of the degreasing plate supports 3 is provided with a clamping plate 6, with a through hole 63 in the center of the clamping plate 6. The axis of the through hole 63 is coaxial with the axis of the pipe 4 on the support wheels 5. A replaceable degreasing plate 7 is provided inside the clamping plate 6, with its center aligned with the center of the through hole 63, and an opening 71 at its center for the pipe 4 to pass through and fit tightly against the surface of the pipe 4. The discharge rack 1 is a material rack equipped with an existing pipe rolling mill. The pipes exiting the pipe rolling mill are temporarily stored on the discharge rack 1 or conveyed along the discharge rack 1 to the next process. This application involves setting multiple roller supports 2 and degreasing plate supports 3 on the discharge rack 1. The support rollers 5 on the roller supports 2 are positioned according to the exit of the pipe mill, so that the pipe 4, after exiting the pipe mill, directly overlaps the support rollers 5 and passes through the openings on the degreasing plates 7 under the guidance of the support rollers 5. This allows the degreasing plates to scrape away most of the oil and dirt adhering to the surface of the pipe 4, reducing the subsequent degreasing and cleaning work and improving the cleaning efficiency of the pipe. The entire degreasing pretreatment device has a simple structure, is easy to install, and is applicable to various types of pipe mills that use mandrels. Furthermore, the physical scraping does not use kerosene or other environmentally harmful substances and will not pollute the surface of the pipe, making it safe and environmentally friendly.

[0023] The number of degreasing sheet supports 3 and roller supports 2 is mainly determined based on factors such as the length of the pipe 4, the amount of oil adhering to the surface of the pipe 4, and the scraping effect of the degreasing sheet 7. At least three of each should be included. The degreasing sheet supports 3 can be evenly spaced according to the length of the pipe 4. In the roller supports 2, two are respectively positioned in front of the foremost degreasing sheet support 3 and behind the last degreasing sheet support 3, with the remaining roller supports evenly spaced in the middle of these two roller supports 2. A preferred configuration for roller supports 2 is at least five, with two at each end, so that when the pipe 4 passes any degreasing sheet support 3, at least two roller supports 2 support the pipe 4, preventing damage to the degreasing sheet 7.

[0024] Regarding the support wheel 5, the preferred embodiment of this utility model is as follows: Figure 2As shown, the support wheel 5 is a roller with an arc groove 51 on its surface. The inner diameter of the arc groove 51 matches the outer diameter of the pipe 4. The pipe 4 is placed on top of the roller and slides along the arc groove 51. This structure of the support wheel 5 can prevent the pipe 4 from shaking during transportation, ensuring that the pipe 4 can stably pass through the opening 71 on the degreasing plate 7. Furthermore, the roller support 2 has two support wheels 5 with their surfaces close together in the vertical direction. The pipe 4 passes through the arc groove 51 between the two support wheels 5. Since the movement of the pipe 4 is mainly driven by the pipe rolling mill or manually pulled, using two support wheels 5 to restrict and guide the pipe 4 can prevent the pipe 4 from detaching from the support wheels 5 due to human factors, further improving the stability of the pipe 4 transportation.

[0025] like Figure 3 , Figure 4 As shown, to facilitate the installation of the degreasing sheet 7, the clamping plate 6 includes a first clamping plate 61 and a second clamping plate 62 arranged opposite each other. The through holes 63 in the middle of both plates are stepped holes, and the ends with the larger inner diameter of the stepped holes are connected to each other, forming a receiving cavity 64 in the middle of the clamping plate 6. The degreasing sheet 7 is circular, and its periphery is clamped in the receiving cavity 64. The degreasing sheet 7 can be made of degreasing cotton, silicone sheet, or degreasing cotton cloth, etc., and is arranged in a multi-layered manner. The thickness is sufficient to be clamped by the first clamping plate 61 and the second clamping plate 62.

[0026] Regarding the fixing method of the clamp 6, a base 65 can be set at the bottom of the first clamp 61. The first clamp 61 is fixed to the degreasing tablet bracket 3 by bolts passing through the base 65. Multiple connecting holes 66 are provided around the through holes 63 on the first clamp 61 and the second clamp 62. The first clamp 61 and the second clamp 62 are fixed together by bolts passing through the connecting holes 66.

[0027] like Figure 5 As shown, to ensure that the pipe 4 can make close contact with the degreasing plate 7 when passing through the opening 71, the opening 71 in the middle of the degreasing plate 7 can be set as a cross-shaped cut. The length of the cross-shaped cut is close to the outer diameter of the pipe 4, ensuring that the degreasing plate 7 around the opening 71 can make close contact with the surface of the pipe 4, increasing the contact area and improving the grease removal effect. In addition, since the periphery of the cross-shaped cut does not make uniform contact with the surface of the pipe 4, in order to ensure uniform grease removal, the cross-shaped cuts of the degreasing plates 7 on each degreasing plate support 3 can be rotated 30~45° in the same direction along the extension direction of the discharge rack 1 to ensure that the grease on the outer surface of the pipe can be uniformly removed.

Claims

1. A degreasing pretreatment device for metal pipes, characterized in that: The device includes a roller support (2) and a degreasing plate support (3) set on the discharge rack (1) of the pipe rolling mill. Multiple roller supports (2) and degreasing plate supports (3) are spaced apart along the extension direction of the discharge rack (1). The top of the roller support (2) is provided with a support wheel (5) for supporting and guiding the movement of the pipe (4). The top of the degreasing plate support (3) is provided with a clamping plate (6). The clamping plate (6) has a through hole (63) in the middle. The axis of the through hole (63) is coaxial with the axis of the pipe (4) on the support wheel (5). A replaceable degreasing plate (7) is provided in the clamping plate (6). The center of the degreasing plate (7) is aligned with the center of the through hole (63), and an opening (71) is provided at the center for the pipe (4) to pass through and to fit tightly against the surface of the pipe (4).

2. The degreasing pretreatment device for metal pipes as described in claim 1, characterized in that: The degreasing tablet holder (3) includes at least three, and the roller holder (2) also includes at least three, two of which are respectively located in front of the foremost degreasing tablet holder (3) and behind the last degreasing tablet holder (3), and the remaining roller holders are evenly spaced in the middle of the two roller holders (2).

3. The degreasing pretreatment device for metal pipes as described in claim 1, characterized in that: The support wheel (5) is a roller with an arc groove (51) on its surface. The inner diameter of the arc groove (51) matches the outer diameter of the pipe (4). The pipe (4) is placed on the top of the roller and slides along the arc groove (51).

4. The degreasing pretreatment device for metal pipes as described in claim 3, characterized in that: The roller bracket (2) has two support wheels (5) with their surfaces close together along the vertical direction, and the tube (4) passes through the arc groove (51) between the two support wheels (5).

5. The degreasing pretreatment apparatus for metal pipes as described in any one of claims 1-4, characterized in that: The clamping plate (6) includes a first clamping plate (61) and a second clamping plate (62) arranged opposite to each other. The through holes (63) in the middle of the two are stepped holes, and the ends with larger inner diameters of the stepped holes are connected to each other to form a receiving cavity (64). The degreasing sheet (7) is circular, and its periphery is clamped in the receiving cavity (64).

6. The degreasing pretreatment apparatus for metal pipes as described in claim 5, characterized in that: The first clamp (61) has a base (65) at its bottom. The first clamp (61) is fixed to the degreasing tablet bracket (3) by bolts passing through the base (65). Multiple connecting holes (66) are provided around the through holes (63) on the first clamp (61) and the second clamp (62). The first clamp (61) and the second clamp (62) are fixed together by bolts passing through the connecting holes (66).

7. The degreasing pretreatment device for metal pipes as described in claim 5, characterized in that: The opening (71) in the middle of the degreasing sheet (7) is a cross-shaped cut. Along the extension direction of the discharge rack (1), the cross-shaped cuts of the degreasing sheets (7) on each degreasing sheet support (3) rotate 30~45° in the same direction.

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