Bolt expansion type steel pipe end expanding device
By introducing a vibration device and a heating ring into the expansion device, the problem of low expansion efficiency of existing steel pipe end expansion devices is solved, achieving faster expansion speed and higher expansion efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-09
- Publication Date
- 2026-03-10
AI Technical Summary
Existing steel pipe end-expanding devices have low expansion efficiency and lack force-applying components, resulting in slow expansion speed.
A vibration device is used to connect the expansion bolt and the expansion motor. The expansion speed is increased by vibrating towards and away from the expansion bolt. During the expansion process, a heating ring is used to heat the end of the steel pipe to improve the expansion efficiency.
It achieves efficient diameter expansion at the end of the steel pipe, with faster expansion speed and significantly improved expansion efficiency.
Smart Images
Figure CN223981075U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of steel pipe processing equipment, specifically to a steel pipe end diameter expansion device. Background Technology
[0002] During the processing of steel pipes, sometimes the inner diameter of the pipe end does not meet the requirements. For example, if the inner diameter of the pipe end is a few millimeters smaller than required, a pipe expansion device is used.
[0003] The steel pipe end-expanding device includes a base plate with a support rod mounted on it. A clamping device for the steel pipe is mounted on the support rod. A movable vertical plate is mounted on the right side of the base plate, and an expanding motor is mounted on the right side of the vertical plate. An expanding bolt, which is a frustum-shaped structure, is connected to the left side of the expanding motor. The outer diameter of the rear part of the expanding bolt is larger than the inner diameter of the steel pipe end. The expanding bolt clamps the end of the steel pipe towards the clamping device. When the expanding motor operates, it drives the expanding bolt to rotate, and the vertical plate moves towards the end of the steel pipe, thus expanding the diameter of the steel pipe. In existing technology, steel pipe end-expanding devices lack other force-applying components, resulting in low expanding efficiency. Summary of the Invention
[0004] The purpose of this invention is to address the above-mentioned shortcomings by providing a bolt-expansion type steel pipe end-diameter expansion device with high expansion efficiency.
[0005] The technical solution of this utility model is implemented as follows: a bolt-type steel pipe end-expansion device includes a base plate, on which a support rod is installed. The support rod has a clamping device for holding the steel pipe. During expansion, the clamping device holds the steel pipe in place at a steel pipe placement station. A vertical plate that can move left and right is installed on the right side of the base plate. An expansion motor is installed on the right side of the vertical plate, and an expansion bolt is connected to the left side of the expansion motor. The expansion bolt has a frustum-shaped structure, and the diameter of its rear outer circumference is larger than the inner diameter of the steel pipe end. The expansion bolt moves towards the end of the steel pipe held by the clamping device. When the expansion motor operates, it drives the expansion bolt to rotate, and the vertical plate moves towards the end of the steel pipe, thus expanding the diameter of the steel pipe. The device is characterized in that the expansion bolt and the expansion motor are connected via a vibration device. The vibration direction of the vibration device is towards and away from the expansion bolt. The vibration device is connected to a control device.
[0006] Furthermore, the support rod and the upright plate are connected by a telescopic cylinder.
[0007] Furthermore, a heating ring is installed around the end of the steel pipe placement station.
[0008] Furthermore, the aforementioned upright plate, expansion motor, expansion bolt, and vibration device form a set of expansion components. There are two sets of expansion components, which are installed on the left and right sides of the base plate respectively, and can expand the diameter of both ends of the steel pipe.
[0009] The beneficial effect of this utility model is that such a steel pipe end expansion device has the advantage of high expansion efficiency. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the longitudinal section structure of this utility model in use.
[0011] The components include: 1. base plate; 2. support rod; 3. clamps; 4. steel pipe; 5. steel pipe placement station; 6. upright plate; 7. expansion motor; 8. expansion bolt; 9. vibration device; 10. telescopic cylinder; 11. heating ring; and 12. slide rail. Detailed Implementation
[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0013] like Figure 1 As shown, the bolt-type steel pipe end-expansion device includes a base plate 1, on which a support rod 2 is installed. The support rod has a clamping device 3 that holds the steel pipe in place. During expansion, the clamping device holds the steel pipe. The steel pipe 4 is positioned at a steel pipe placement station 5. A vertical plate 6, which can move left and right, is installed on the right side of the base plate. An expansion motor 7 is installed on the right side of the vertical plate. An expansion bolt 8 is connected to the left side of the expansion motor. The expansion bolt has a frustum-shaped structure, and the diameter of its rear outer circumference is larger than the inner diameter of the steel pipe end. The expansion bolt moves towards the end of the steel pipe held by the clamping device. When the expansion motor operates, it drives the expansion bolt to rotate, and the vertical plate moves towards the end of the steel pipe, thus expanding the diameter of the steel pipe. Its characteristic is that the expansion bolt and the expansion motor are connected via a vibration device 9. The vibration direction of the vibration device is towards and away from the expansion bolt, and the vibration direction emitted by the vibration device is left and right. The vibration device is connected to a control device.
[0014] In this invention, when expanding the diameter of a steel pipe, the steel pipe is placed on a steel pipe placement station and securely fixed with clamps. The expansion motor is started to rotate the expansion bolt, while the vertical plate moves towards the end of the steel pipe. For example, a left-right sliding track 12 is installed on the base plate, and the vertical plate is installed on the track and can slide left and right. The vertical plate is connected to components that allow it to move left and right. In short, anything that allows the vertical plate to move left and right is acceptable. The movement of the vertical plate towards the end of the steel pipe ensures that the expansion bolt enters the end of the steel pipe. Furthermore, since the outer diameter of the rear part of the expansion bolt is larger than the inner diameter of the end of the steel pipe, the expansion of the steel pipe can be achieved. During the expansion process, activating the first vibration device allows the expansion bolt to enter the end of the steel pipe through vibration, resulting in a faster entry speed and achieving the high expansion efficiency of this invention. For example, the vibration device includes a housing, inside which a vibration motor is installed. The vibration motor includes a motor body with a power output shaft. An eccentric wheel is mounted on the power output shaft. Running the motor causes the vibration device to vibrate. Another example is an electromagnetic vibration device. The structure of an electromagnetic vibration device mainly includes components such as an electromagnet, a spring, an armature, and a vibrating body. The working principle of the electromagnetic vibration device is that the electromagnet generates a magnetic field when energized, driving the armature to periodically attract and release, thereby generating vibration. Specifically, it includes the following components: an electromagnet: generates a magnetic field when energized, attracting the armature; a spring: provides elastic support, enabling the vibrating body to perform simple harmonic motion within a given frequency range; an armature: interacts with the electromagnet to generate vibration; and a vibrating body: directly participates in the vibration, usually in contact with the material, propelling the material. In short, any vibration device that can generate vibration is acceptable, and the vibration device itself is a component found in existing technology. The vibration direction of the vibration device is towards and away from the expanding bolt. In this way, when the vibration device vibrates towards the end of the steel pipe, the force on the steel pipe is greater than the force of the expanding bolt being inserted into the end of the steel pipe by the motor. This can achieve the expansion of the steel pipe diameter. After the end of the steel pipe is expanded, the expanding bolt can continue to move towards the steel pipe, achieving the effect of continuously expanding the diameter forward.
[0015] Simply put, the control device is a switch.
[0016] The portion of the expanding plug near the end of the steel pipe has an outer diameter smaller than the inner diameter of the steel pipe, ensuring that the expanding plug can be smoothly screwed into the inner diameter of the end of the steel pipe.
[0017] In one technical solution, the support rod and the upright plate are further connected by a telescopic cylinder 10. This ensures that the upright plate moves towards the end of the steel pipe under the action of the telescopic cylinder.
[0018] Furthermore, a heating ring 11 is installed around the end of the steel pipe placement station.
[0019] This invention is designed to heat the end of the steel pipe, thereby expanding the diameter of the end of the steel pipe at a higher temperature.
[0020] The heating ring is a ring-shaped object containing a heating element connected to a power source. It can heat objects.
[0021] Furthermore, the aforementioned upright plate, expansion motor, expansion bolt, and vibration device form a set of expansion components. There are two sets of expansion components, which are installed on the left and right sides of the base plate respectively, and can expand the diameter of both ends of the steel pipe.
[0022] This invention allows for simultaneous expansion of the diameter of the steel pipe at both ends.
[0023] In the description of the embodiments of this utility model, it should be noted that the orientations or positional relationships indicated by terms such as "up," "down," "horizontal," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships commonly used when the product is in use. These are merely for the convenience of describing the invention and simplifying the description, and do not 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 the invention. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0024] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.
Claims
1. A plug expansion device for the end of a steel pipe, comprising a base plate, a support rod mounted on the base plate, a clamping member on the support rod for clamping the steel pipe, the clamping member clamping the steel pipe in a position of a pipe placement station, a vertical plate mounted on the right side of the base plate and movable left and right, an expansion motor mounted on the right side of the vertical plate, an expansion plug connected to the left side of the expansion motor, the expansion plug being in a circular truncated cone shape, the diameter of the outer periphery of the rear part of the expansion plug being greater than the inner diameter of the end of the steel pipe, the expansion plug facing the end of the steel pipe clamped by the clamping member, the expansion motor operating to drive the expansion plug to rotate and the vertical plate moving toward the end of the steel pipe to achieve the expansion of the steel pipe; characterized in that: The expanding bolt and the expanding motor are connected through a vibrating device, the vibrating direction of the vibrating device is towards the expanding bolt and away from the expanding bolt, and the vibrating device is connected with a control device. 2. The device according to claim 1, characterized in that: The support rod and the vertical plate are also connected with a telescopic cylinder.
3. The device according to claim 1 or 2, characterized in that: A heating ring is also installed around the end of the steel pipe placement station.
4. The device according to claim 1 or 2, characterized in that: The vertical plate, the expanding motor, the expanding bolt and the vibrating device form an expanding assembly, and the expanding assembly is two sets, which are installed on the left side and the right side of the bottom plate respectively, and can expand the two ends of the steel pipe.