Supporting device for hot expanding of steel pipe

Abstract

The utility model relates to the technical field of steel pipe plastic deformation, and discloses a supporting device for steel pipe hot expanding, which comprises a bottom frame and a supporting sliding seat arranged on the bottom frame, the supporting sliding seat comprises a support and a sliding plate, the support is provided with an arc cavity, the sliding plate is arranged along the surface of the arc cavity, and the inner diameter of the sliding plate is equal to the outer diameter of a hot expanding steel pipe. Water pipes are arranged on the two sides of the top of the arc cavity, a plurality of overflow holes are formed in the faces, facing the heat expansion steel pipe, of the water pipes, and water flowing out of the overflow holes flows between the sliding plate and the heat expansion steel pipe. According to the supporting device for steel pipe hot expanding, the sliding plate is designed according to the size of the steel pipe, the contact area of the sliding plate and the steel pipe is increased as much as possible, and therefore supporting force is evenly distributed on the outer surface of the steel pipe, and the situation that the wall thickness of the steel pipe is not uniform can be avoided; friction resistance between the steel pipe and the sliding plate can be reduced, cooling of the steel pipe can be accelerated, and therefore it is guaranteed that the size of the heat expansion steel pipe is stable and accurate.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe plastic deformation technology, and in particular to a support device for hot expansion of steel pipe. Background Technology

[0002] Medium-frequency hot expansion steel pipe process is the mainstream process for producing large-diameter seamless steel pipes. As the diameter of the steel pipe continues to increase, the size of the mandrel also becomes larger, and the weight of the mandrel also increases. The weight of the mandrel will be applied to the lower side of the hot expanded steel pipe.

[0003] In existing technologies, roller conveyors are typically used to support the lower side of the steel pipe. The contact area between the rollers on the conveyor and the lower side of the steel pipe is small, and the curvature of the rollers remains constant. For steel pipes of different diameters, they are usually only in line contact along the axial direction of the steel pipe. After thermal expansion deformation, the steel pipe is still at a relatively high temperature, and its yield strength is low at high temperatures. Due to the weight of the mandrel, the contact area with the rollers leaves deep roller conveyor marks, resulting in the wall thickness of the steel pipe at the contact area with the rollers being lower than the design requirement. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a support device for hot expansion of steel pipes, which provides reliable support for the steel pipes and ensures the dimensional accuracy of the steel pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A support device for hot expansion of steel pipe includes a base frame and a support slide mounted on the base frame. The support slide includes a bracket and a slide plate. The bracket is provided with an arc cavity. The slide plate is arranged along the surface of the arc cavity, and the inner diameter of the slide plate is equal to the outer diameter of the hot-expanded steel pipe. Water pipes are provided on both sides of the top of the arc cavity. Several overflow holes are opened on the surface of the water pipes facing the hot-expanded steel pipe. The water flowing out of the overflow holes flows between the slide plate and the hot-expanded steel pipe.

[0007] As an alternative, the support includes a base plate, with upright plates welded to both sides of the base plate, an arc-shaped plate welded between the tops of the two upright plates, the bottom of the arc-shaped plate welded to the base plate, and stiffening plates welded between the two sides of the base plate and the arc-shaped plate.

[0008] As an alternative, the arc angle of the curved plate is 120° to 160°.

[0009] As an alternative, the angle between the stiffening plate and the base plate is 45° to 60°.

[0010] As an optional solution, levels are installed on both sides of the base plate.

[0011] As an alternative, the skateboard is made of stainless steel mirror panel and the frame is made of carbon steel.

[0012] As an optional solution, a pad is provided between the base frame and the support slide. The height and number of the pads are adjustable, and the base frame, pads and support slide are fastened together with bolts.

[0013] The beneficial effects of this utility model are:

[0014] The support device for hot expansion of steel pipes is designed with a sliding plate to maximize the contact area between the sliding plate and the steel pipe, thereby distributing the support force evenly on the outer surface of the steel pipe. This avoids uneven wall thickness. Furthermore, adding cooling water to the contact surface between the sliding plate and the steel pipe reduces the frictional resistance between them and accelerates the cooling of the steel pipe, thus ensuring the dimensional stability and accuracy of the hot-expanded steel pipe. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the support device for hot expansion of steel pipe provided in this embodiment of the utility model.

[0016] In the attached image:

[0017] 1. Base frame; 2. Support slide; 21. Bracket; 211. Base plate; 212. Vertical plate; 213. Curved plate; 214. Rib plate; 22. Slide plate; 23. Water pipe; 24. Level; 3. Pad; 4. Bolt. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 utility model.

[0022] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0023] Please see Figure 1 As shown, this embodiment provides a support device for hot expansion of steel pipe, including a base frame 1 and a support slide 2 disposed on the base frame 1. The support slide 2 includes a bracket 21 and a slide plate 22. The bracket 21 is provided with an arc cavity. The slide plate 22 is disposed along the surface of the arc cavity, and the inner diameter of the slide plate 22 is equal to the outer diameter of the hot expanded steel pipe. Water pipes 23 are disposed on both sides of the top of the arc cavity. Several overflow holes are opened on the surface of the water pipes 23 facing the hot expanded steel pipe. The water flowing out of the overflow holes flows between the slide plate 22 and the hot expanded steel pipe.

[0024] Therefore, by maximizing the contact area between the slide plate 22 and the steel pipe, the supporting force is evenly distributed on the outer surface of the steel pipe, which can prevent uneven wall thickness of the steel pipe. Furthermore, adding cooling water to the contact surface between the slide plate 22 and the steel pipe can reduce the frictional resistance between the steel pipe and the slide plate 22 and accelerate the cooling of the steel pipe, thereby ensuring the dimensional stability and accuracy of the hot-expanded steel pipe.

[0025] Optionally, the support 21 includes a base plate 211, with upright plates 212 welded to both sides of the base plate 211, an arc plate 213 welded between the tops of the two upright plates 212, the bottom of the arc plate 213 welded to the base plate 211, and stiffening plates 214 welded between the two sides of the base plate 211 and the arc plate 213.

[0026] Thus, the base plate 211, the upright plate 212, and the arc plate 213 form a stable support structure, ensuring stable support for the steel pipe. Furthermore, the stiffening plate 214 enhances the overall rigidity and stability of the support 21, ensuring that the support 21 is not easily deformed during the thermal expansion process, thereby further improving the reliability and service life of the support 21.

[0027] Furthermore, the arc angle α of the arc plate 213 is 120° to 160°.

[0028] Therefore, by reasonably setting the arc angle α of the arc plate 213, the steel pipe is stably supported and the contact area is increased during the hot expansion process, avoiding local stress that would cause the wall thickness of the steel pipe to be reduced.

[0029] Furthermore, the included angle β between the stiffening plate 214 and the base plate 211 is 45° to 60°.

[0030] Therefore, the angle β between the stiffening plate 214 and the base plate 211 is designed within this range, which can effectively disperse the supporting force and enhance the overall stability of the support 21, ensuring that the steel pipe is subjected to uniform force during the hot expansion process.

[0031] Optionally, a level 24 is provided on both sides of the base plate 211 to determine the levelness of the support slide 2.

[0032] Optionally, the skateboard 22 is made of stainless steel mirror panel, and the support 21 is made of carbon steel.

[0033] Therefore, the skateboard 22 is made of stainless steel with a very low coefficient of friction, which can greatly reduce frictional resistance and power consumption; the bracket 21 is made of high-strength carbon steel, which ensures the durability and load-bearing capacity of the device, and further improves the stability and service life of the overall structure.

[0034] Optionally, a pad 3 is provided between the base frame 1 and the support slide 2. The height and number of pads 3 are adjustable. The base frame 1, pads 3 and support slide 2 are fastened together by bolts 4.

[0035] Therefore, the height of the support slide 2 can be adjusted by using the pads 3. Depending on the diameter of the steel pipe, different numbers and heights of pads 3 can be used. After the height adjustment is completed, the base plate 211 of the support slide 2, each pad 3 and the base frame 1 are fixed by bolts 4.

[0036] In summary, the above-mentioned support device for hot expansion of steel pipes has the following advantages:

[0037] 1) The increased contact area with the steel pipe and the even distribution of the supporting force on the outer surface of the hot-expanded steel pipe can prevent uneven wall thickness from occurring in the steel pipe.

[0038] 2) The friction coefficient between the slide plate 22 and the steel pipe is very small, and the frictional resistance between the slide plate 22 and the steel pipe is further reduced by cooling water during operation, thereby reducing power consumption;

[0039] 3) The height of the support slide 2 can be adjusted by adjusting the height or number of pads 3 to accommodate steel pipes of different diameters;

[0040] 4) The support structure 21 is stable, which enhances the overall rigidity and stability.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A support device for hot expansion of steel pipes, characterized in that, The utility model provides a hot expansion steel pipe cooling device, including chassis (1) and support slide (2) set up on chassis (1), support slide (2) includes support (21) and slide plate (22), be provided with circular cavity on support (21), slide plate (22) is arranged along the surface of circular cavity, and the inner diameter of slide plate (22) is equal to the outer diameter of hot expansion steel pipe, and the top of circular cavity is provided with water pipe (23) on both sides, a plurality of overflow holes are formed on the surface of water pipe (23) to hot expansion steel pipe, and the water flow of overflow hole flows to between slide plate (22) and hot expansion steel pipe.

2. The support device for a steel pipe hot expander according to claim 1, characterized by The support (21) includes a bottom plate (211), two side edges of the bottom plate (211) are respectively welded with a vertical plate (212), the top of the two vertical plates (212) is welded with an arc plate (213), the bottom of the arc plate (213) is welded with the bottom plate (211), and the two side edges of the bottom plate (211) and the arc plate (213) are further welded with a rib plate (214).

3. The support device for a steel pipe hot expander according to claim 2, characterized by The arc angle of the arc plate (213) is 120°-160°.

4. The support device for a steel pipe hot expander according to claim 2, characterized by The included angle between the rib plate (214) and the bottom plate (211) is 45°-60°.

5. The support device for a steel pipe hot expander according to claim 2, characterized by The two sides of the bottom plate (211) are provided with a level (24).

6. The support device for a steel pipe hot expander according to claim 1, characterized by The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material.

7. The support apparatus for a steel pipe hot expander according to claim 1, wherein The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of carbon steel material. The bottom plate (211) is provided with a level (24). The slide plate (22) is made of stainless steel mirror plate, and the support (21) is made of

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