A reaming device for machining a large-diameter steel pipe

Abstract

The utility model relates to steel pipe processing technical field especially relates to a reaming device for large -diameter steel pipe processing. Its technical scheme includes: mounting bracket, install the frame on the mounting bracket, the side end surface of frame installs the reaming mechanism, the reaming mechanism is used for reaming to steel pipe, be equipped with steel pipe body, first clamping mechanism and second clamping mechanism in the frame, first clamping mechanism and second clamping mechanism are all used for clamping limit to steel pipe body, be equipped with drive mechanism on the frame, drive mechanism is used for driving second clamping mechanism and clamping to steel pipe body, first clamping mechanism and second clamping mechanism all be equipped with heating mechanism on, heating mechanism is used for heating first clamping mechanism and second clamping mechanism. The utility model satisfies steel pipe processing reaming, can heat the steel pipe to assist while reaming, avoid the quality problem of steel pipe cracking caused by direct cold working.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing technology, specifically to a hole-expanding device for processing large-diameter steel pipes. Background Technology

[0002] In industrial production, steel pipes are a key basic component, characterized by a hollow cross-section and a length significantly greater than their diameter or circumference. Based on different classification dimensions, steel pipes can be divided into various types: by cross-sectional shape, mainly including round, square, rectangular, and irregularly shaped steel pipes; by material properties, encompassing carbon structural steel pipes, low-alloy structural steel pipes, alloy steel pipes, and composite steel pipes; and by application scenario, they can be categorized into steel pipes for transportation pipelines, engineering structures, thermal equipment, petrochemical industries, machinery manufacturing, geological drilling, and high-pressure equipment, widely serving multiple industrial sectors. In the actual processing and application of steel pipes, it is often necessary to use hole enlargement equipment to expand the hole diameter in order to meet the installation and use requirements under different working conditions.

[0003] A search revealed that patent CN217451855U discloses a steel pipe expanding device. While this device uses a rotating threaded rod to limit the tail end of the steel pipe with a limiting plate, and a second cylinder drives a push plate to expand the hole in the pipe with an expanding rod, current expanding devices generally employ a direct cold extrusion expanding process. This process does not involve pre- or simultaneous heat treatment of the steel pipe's working portion. This method easily leads to cracking or the formation of microcracks during cold working due to internal stress concentration and uneven plastic deformation. This not only severely affects the processing accuracy and product quality of the steel pipe but may also reduce its structural strength and service life, posing safety hazards for subsequent use. Therefore, existing steel pipe expanding devices still have significant shortcomings in their processing technology design and urgently require further optimization and improvement. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hole-expanding device for processing large-diameter steel pipes, which solves the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows: A hole-expanding device for processing large-diameter steel pipes includes a mounting frame, on which a frame is mounted, and a hole-expanding mechanism is mounted on the side end face of the frame. The hole-expanding mechanism is used to expand the hole of the steel pipe. The frame is provided with a steel pipe body, a first clamping mechanism and a second clamping mechanism. Both the first clamping mechanism and the second clamping mechanism are used to clamp and limit the steel pipe body. The frame is provided with a driving mechanism, which is used to drive the second clamping mechanism to clamp the steel pipe body. Both the first clamping mechanism and the second clamping mechanism are equipped with a heating mechanism, which is used to heat the first clamping mechanism and the second clamping mechanism, and the first clamping mechanism and the second clamping mechanism are heated to heat the steel pipe body.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, a limiting component is installed on the inner wall side end face of the frame, which limits the movement of the steel pipe body.

[0008] The beneficial effects of adopting the above-mentioned further solutions are: Installing a limiting component on the inner wall side face of the frame can provide axial limiting for the steel pipe body.

[0009] Furthermore, the hole-expanding mechanism includes a second hydraulic rod, which is mounted on the frame. A hole-expanding component is mounted on the output shaft of the second hydraulic rod via a bracket. A guide rod is mounted on the end of the bracket opposite to the hole-expanding component, and the guide rod is slidably sleeved within the frame.

[0010] The beneficial effects of adopting the above-mentioned further solutions are: The second hydraulic rod provides a stable axial driving force, which can drive the expanding part to move towards the steel pipe body at a uniform speed, ensuring uniform force during the expanding process, thereby carrying out the expanding operation; at the same time, the guide rod on the support slides with the frame, which can guide the movement direction of the expanding part, prevent the expanding part from deviating during the movement, ensure that the expanding hole diameter meets the processing requirements, and improve the expanding accuracy.

[0011] Furthermore, the drive mechanism includes a first hydraulic rod, which is mounted within the frame via a mounting plate.

[0012] The beneficial effects of adopting the above-mentioned further solutions are: The mounting plate can be used to securely fix the first hydraulic rod within the frame, ensuring the structural stability of the first hydraulic rod during operation.

[0013] Furthermore, the second clamping mechanism includes a second clamping frame, the top surface of which is connected to the output end of the first hydraulic rod, and a limit rod is installed on the second clamping frame, the limit rod being slidably sleeved within the mounting plate.

[0014] The beneficial effects of adopting the above-mentioned further solutions are: The first hydraulic rod can directly drive the second clamping frame to move up and down, thereby clamping the steel pipe body. At the same time, the sliding cooperation between the limiting rod and the mounting plate can restrict the movement trajectory of the second clamping frame, preventing the second clamping frame from tilting or deviating during movement, ensuring that the second clamping frame is precisely aligned with the first clamping frame, and guaranteeing the clamping and limiting effect on the steel pipe body.

[0015] Furthermore, the first clamping mechanism includes a first clamping frame, which is mounted on the mounting frame via a fixing frame.

[0016] The beneficial effects of adopting the above-mentioned further solutions are: The fixed frame can securely connect the first clamping frame to the mounting frame to form a fixed clamping end, which cooperates with the movable second clamping frame to clamp the steel pipe.

[0017] Furthermore, the heating mechanism includes a heating component and a liquid inlet component. The heating component is used to heat the second clamping frame and the first clamping frame. The liquid inlet component is used to heat the heat transfer oil inside the cavities of the second clamping frame and the first clamping frame. The heating component includes an electric heating tube installed inside the cavities of the second clamping frame and the first clamping frame. The liquid inlet component includes a liquid inlet pipe installed on the second clamping frame and the first clamping frame, and a sealing cap is installed on the liquid inlet pipe.

[0018] The beneficial effects of adopting the above-mentioned further solutions are: On the one hand, the heating element is directly installed in the cavity of the clamping frame, which can quickly heat the clamping frame. Then, heat is transferred through the contact between the clamping frame and the steel pipe body to preheat the part of the steel pipe to be enlarged, avoiding cold working cracking. On the other hand, heat transfer oil is injected into the cavity through the liquid inlet pipe. The heat transfer oil can make the clamping frame heated evenly and prevent local overheating from damaging the steel pipe. At the same time, the sealing cap can prevent heat transfer oil leakage and ensure the safety and stability of the heating process. The combination of the two heating methods can not only improve the heating efficiency, but also ensure the heating uniformity, effectively improving the quality of steel pipe enlargement processing.

[0019] This utility model provides a hole-reaming device for processing large-diameter steel pipes. It has the following beneficial effects: The cooperation of the first and second clamping mechanisms forms a stable and precise clamping and limiting of the steel pipe body, preventing displacement or shaking during the reaming process. Simultaneously, the heating mechanism, through a dual heating method of electric heating tubes and heat-conducting oil, can quickly and evenly preheat the part of the steel pipe to be reamed, effectively reducing the brittleness of the steel pipe during cold working and preventing cracking and deformation during reaming, laying the foundation for subsequent precise reaming. Driven by the second hydraulic rod, the reaming mechanism moves the reaming part towards the steel pipe at a uniform speed and stably, and with the guiding action of the guide rod, ensures that the reamed hole diameter accurately meets the processing requirements. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0021] In the attached diagram: Figure 1 This is a side view of the present invention; Figure 2 This is a front view schematic diagram of the present invention; Figure 3 This is an enlarged schematic diagram of the hole-expanding mechanism of this utility model; Figure 4 This is an enlarged schematic diagram of the drive mechanism of this utility model; Figure 5 This is a cross-sectional schematic diagram of the second clamping frame of this utility model.

[0022] The attached diagram lists the components represented by each number as follows: 1. Mounting bracket; 2. Steel pipe body; 3. Frame; 301. Limiting component; 4. Drive mechanism; 401. First hydraulic rod; 402. Mounting plate; 5. Hole reaming mechanism; 501. Bracket; 502. Hole reaming component; 503. Guide rod; 504. Second hydraulic rod; 6. First clamping mechanism; 601. First clamping frame; 602. Fixing frame; 7. Second clamping mechanism; 701. Second clamping frame; 702. Limiting rod; 8. Heating mechanism; 801. Electric heating element; 802. Liquid inlet pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 5 As shown, the embodiments provided by this utility model are as follows: Example

[0025] A hole-expanding device for processing large-diameter steel pipes includes a mounting frame 1, a frame 3 mounted on the mounting frame 1, and a hole-expanding mechanism 5 mounted on the side end face of the frame 3. The hole-expanding mechanism 5 is used to expand the hole of the steel pipe. The frame 3 is equipped with a steel pipe body 2, a first clamping mechanism 6 and a second clamping mechanism 7. Both the first clamping mechanism 6 and the second clamping mechanism 7 are used to clamp and limit the steel pipe body 2. The frame 3 is equipped with a driving mechanism 4, which is used to drive the second clamping mechanism 7 to clamp the steel pipe body 2. Heating mechanisms 8 are provided on both the first clamping mechanism 6 and the second clamping mechanism 7. The heating mechanisms 8 are used to heat the first clamping mechanism 6 and the second clamping mechanism 7. After the first clamping mechanism 6 and the second clamping mechanism 7 are heated, the steel pipe body 2 is heated. A limiting component 301 is installed on the inner wall side end face of the frame 3. The limiting component 301 limits the steel pipe body 2. The limiting component 301 installed on the inner wall side end face of the frame 3 can play an axial limiting role on the steel pipe body 2. The reaming mechanism 5 includes a second hydraulic rod 504, which is mounted on a frame 3. A reaming component 502 is mounted on the output shaft of the second hydraulic rod 504 via a bracket 501. A guide rod 503 is mounted on the end of the bracket 501 opposite to the reaming component 502. The guide rod 503 is slidably sleeved within the frame 3 and provides a stable axial driving force through the second hydraulic rod 504, which can drive the reaming component 502 to move uniformly toward the steel pipe body 2, ensuring uniform force during the reaming process, thereby performing the reaming operation. At the same time, the guide rod 503 on the bracket 501 slides with the frame 3, which can guide the movement direction of the reaming component 502, preventing the reaming component 502 from deviating during the movement, ensuring that the reamed hole diameter meets the processing requirements, and improving the reaming accuracy. The drive mechanism 4 includes a first hydraulic rod 401, which is installed in the frame 3 by a mounting plate 402. The mounting plate 402 can be used to firmly fix the first hydraulic rod 401 in the frame 3, ensuring the structural stability of the first hydraulic rod 401 when it is working. The second clamping mechanism 7 includes a second clamping frame 701. The top surface of the second clamping frame 701 is connected to the output end of the first hydraulic rod 401. A limit rod 702 is installed on the second clamping frame 701. The limit rod 702 is slidably sleeved in the mounting plate 402. The first hydraulic rod 401 can directly drive the second clamping frame 701 to move up and down, thereby clamping the steel pipe body 2. At the same time, the sliding cooperation between the limit rod 702 and the mounting plate 402 can limit the movement trajectory of the second clamping frame 701, preventing the second clamping frame 701 from tilting or deviating during movement, ensuring that the second clamping frame 701 is precisely aligned with the first clamping frame 601, and ensuring the clamping and limiting effect on the steel pipe body 2. The first clamping mechanism 6 includes a first clamping frame 601, which is mounted on the mounting frame 1 via a fixing frame 602. The fixing frame 602 can securely connect the first clamping frame 601 to the mounting frame 1 to form a fixed clamping end, which cooperates with the movable second clamping frame 701 to clamp the steel pipe. The heating mechanism 8 includes a heating component and a liquid inlet component. The heating component heats the second clamping frame 701 and the first clamping frame 601, and the liquid inlet component heats the heat transfer oil inside the cavities of the second clamping frame 701 and the first clamping frame 601. The heating component includes an electric heating tube 801 installed inside the cavities of the second clamping frame 701 and the first clamping frame 601. The liquid inlet component includes a liquid inlet pipe 802 installed on the second clamping frame 701 and the first clamping frame 601, and a sealing cap is installed on the liquid inlet pipe 802. The heat pipe 801 is directly installed inside the clamping frame cavity, which can quickly heat the clamping frame. Then, heat is transferred through the contact between the clamping frame and the steel pipe body 2 to preheat the part of the steel pipe to be enlarged, avoiding cold working cracking. On the other hand, heat transfer oil is injected into the cavity through the liquid inlet pipe 802. The heat transfer oil can make the clamping frame heated evenly and prevent local overheating from damaging the steel pipe. At the same time, the sealing cap can prevent heat transfer oil leakage and ensure the safety and stability of the heating process. The combination of the two heating methods can not only improve the heating efficiency but also ensure the heating uniformity, effectively improving the quality of steel pipe enlargement processing. Furthermore, the first hydraulic rod 401, the second hydraulic rod 504, and the heating element 801 of the hole-expanding device can be controlled by an external power supply and an external control switch. The power supply and control principles and circuit connection methods of the external power supply and external control switch are common functional module designs, which are common knowledge in the fields of electrical automation control and mechanical equipment. The relevant technologies are widely used and the principles are clear, so there is no need to elaborate further.

[0026] Working principle: Step 1: Placement and initial positioning of steel pipes The operator places the steel pipe body 2 to be processed onto the first clamping frame 601 of the first clamping mechanism 6; Push the steel pipe body 2 until its end contacts the limiting member 301 on the inner wall side face of the frame 3. The limiting member 301 achieves axial limiting of the steel pipe body 2, preventing axial movement of the steel pipe during subsequent processing. Step 2: Activate drive mechanism 4 to complete steel pipe clamping. The first hydraulic rod 401 of the drive mechanism 4 is activated, and the output axis of the first hydraulic rod 401 pushes the second clamping frame 701 of the second clamping mechanism 7 downward. During this process, the limiting rod 702 on the second clamping frame 701 slides along the preset hole of the mounting plate 402 to ensure that the second clamping frame 701 only moves vertically and does not tilt or deviate. The second clamping frame 701 and the first clamping frame 601 together clamp the steel pipe body 2, completing the stable clamping of the steel pipe and providing stable support for subsequent heating and hole expansion. Step 3: Activate the heating mechanism to preheat the steel pipe. The heating process of starting the heating mechanism 8 is as follows: First, heat transfer oil is injected into the internal cavity of the first clamping frame 601 and the second clamping frame 701 through the liquid inlet component of the heating mechanism 8. After the injection is completed, the sealing cap on the liquid inlet pipe 802 is tightened to prevent the heat transfer oil from leaking. The heating component of the heating mechanism 8 is activated, and the electric heating tube 801 directly heats the heat-conducting oil and the clamp body in the cavity of the first clamp 601 and the second clamp 701. The heat transfer oil quickly transfers heat to the clamping surfaces of the first clamping frame 601 and the second clamping frame 701. Heat is then transferred through the contact between the clamping surfaces and the steel pipe body 2, uniformly preheating the area of ​​the steel pipe to be enlarged, reducing the brittleness of the steel pipe and preventing cracking during subsequent enlargement. Fourth step: Activate the enlargement mechanism 5 to complete the enlargement of the steel pipe. After the steel pipe body 2 is preheated to the preset temperature, the hole expansion mechanism 5 is started: the second hydraulic rod 504 of the hole expansion mechanism 5 outputs axial driving force, pushing the bracket 501 to move towards the steel pipe body 2; The enlarging component 502 installed at one end of the bracket 501 moves synchronously with the bracket 501, while the guide rod 503 at the other end of the bracket 501 slides along the preset guide hole of the frame 3 to ensure that the enlarging component 502 always moves along the axis of the steel pipe and does not deviate. The expanding member 502 gradually extends into the part of the steel pipe body 2 to be expanded. Under the stable driving force of the second hydraulic rod 504, it expands the steel pipe at a uniform speed until the expanded hole diameter reaches the preset processing requirements.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hole-expanding device for processing large-diameter steel pipes, comprising a mounting frame (1), a frame (3) mounted on the mounting frame (1), and a hole-expanding mechanism (5) mounted on the side end face of the frame (3), the hole-expanding mechanism (5) being used to expand the hole of the steel pipe, characterized in that: The frame (3) is provided with a steel pipe body (2), a first clamping mechanism (6) and a second clamping mechanism (7). The first clamping mechanism (6) and the second clamping mechanism (7) are both used to clamp and limit the steel pipe body (2). The frame (3) is provided with a driving mechanism (4). The driving mechanism (4) is used to drive the second clamping mechanism (7) to clamp the steel pipe body (2). The first clamping mechanism (6) and the second clamping mechanism (7) are each provided with a heating mechanism (8). The heating mechanism (8) is used to heat the first clamping mechanism (6) and the second clamping mechanism (7). After the first clamping mechanism (6) and the second clamping mechanism (7) are heated, the steel pipe body (2) is heated.

2. The reaming device for processing large-diameter steel pipes according to claim 1, characterized in that: A limiting member (301) is installed on the inner wall side end face of the frame (3), and the limiting member (301) limits the steel pipe body (2).

3. The reaming device for processing large-diameter steel pipes according to claim 1, characterized in that: The hole-expanding mechanism (5) includes a second hydraulic rod (504), which is mounted on the frame (3). A hole-expanding component (502) is mounted on the output shaft of the second hydraulic rod (504) via a bracket (501). A guide rod (503) is mounted on one end of the bracket (501) away from the hole-expanding component (502). The guide rod (503) is slidably sleeved within the frame (3).

4. The reaming device for processing large-diameter steel pipes according to claim 1, characterized in that: The drive mechanism (4) includes a first hydraulic rod (401), which is mounted in the frame (3) via a mounting plate (402).

5. A hole-reaming device for processing large-diameter steel pipes according to claim 1 or 4, characterized in that: The second clamping mechanism (7) includes a second clamping frame (701), the top surface of the second clamping frame (701) is connected to the output end of the first hydraulic rod (401), and a limit rod (702) is installed on the second clamping frame (701), the limit rod (702) is slidably sleeved in the mounting plate (402).

6. The reaming device for processing large-diameter steel pipes according to claim 1, characterized in that: The first clamping mechanism (6) includes a first clamping frame (601), which is mounted on the mounting frame (1) by a fixing frame (602).

7. The reaming device for processing large-diameter steel pipes according to claim 1, characterized in that: The heating mechanism (8) includes a heating component and a liquid inlet component. The heating component is used to heat the second clamping frame (701) and the first clamping frame (601). The liquid inlet component is used to heat the heat transfer oil in the cavity of the second clamping frame (701) and the first clamping frame (601). The heating component includes an electric heating tube (801) installed in the cavity of the second clamping frame (701) and the first clamping frame (601). The liquid inlet component includes a liquid inlet pipe (802) installed on the second clamping frame (701) and the first clamping frame (601), and a sealing cap is installed on the liquid inlet pipe (802).

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