Pipe end expanding device for spiral steel pipe

Abstract

The utility model discloses a spiral steel pipe end expanding device, which belongs to the technical field of steel pipe expanding and is characterized in that the front end of a transmission device is connected with a limiting sliding frame through a stabilizing seat, a sliding seat is embedded in a sliding groove formed in the limiting sliding frame, the limiting sliding frame is connected with the sliding seat through an adjusting screw rod, and the adjusting screw rod is rotated to drive the sliding seat to move along the sliding groove. A replaceable expanding head is installed at the front end of the sliding seat, the transmission device drives the replaceable expanding head to rotate at the end opening of the steel pipe to be expanded, and expanding operation is achieved through the combined action of the replaceable expanding head and the heating assembly. A butt joint groove is formed in the stabilizing base, and a stabilizing inserting rod is inserted into the sliding base. And the use stability of the replaceable expanding head is ensured through the design of a stabilizing seat and a stabilizing inserting rod. And the replaceable expanding head can be replaced according to different requirements, so that the adaptability and flexibility of equipment are improved. The limiting insertion hole and the stable insertion rod are matched to ensure the installation and use stability of the replaceable expanding head, and the expanding operation accuracy and efficiency are further improved.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe diameter expansion technology, and in particular to a spiral steel pipe end diameter expansion device. Background Technology

[0002] The working principle of spiral welded steel pipe end expanding devices typically involves the expansion and contraction of modules or expanding heads. In a typical design, the expanding machine has a set of modules corresponding to the diameter of the steel pipe. These modules reciprocate axially under the drive of hydraulic cylinders. When the outer diameter of the module shrinks, the steel pipe is fitted onto the outer diameter of the module; when the module expands outward, the base material is stretched along the pipe wall, resulting in plastic deformation, thereby achieving the purpose of expanding the diameter. Another design uses an expanding head in conjunction with a hydrostatic testing machine for expanding the diameter. The expanding head enters the interior of the steel pipe through the moving end of the hydrostatic testing machine, and the expansion of the conical section is used to achieve the expansion of the pipe end.

[0003] In the practical application of the spiral steel pipe end expansion device, although the design of slide, spring and wedge block has achieved the shrinkage and expansion function of the expansion head to a certain extent, this structure does have the problem of insufficient adjustment stability.

[0004] This structure relies on the interaction of a slide, spring, and wedge to adjust the expanding head. However, due to factors such as the elasticity of the spring and the tilt angle of the wedge, achieving extremely high precision during adjustment may be difficult. This can lead to some deviation in the diameter and roundness of the expanded steel pipe end, affecting the overall quality of the product.

[0005] Over prolonged use, the spring may lose its original elasticity due to fatigue, affecting the expansion and contraction functions of the expanding head. Furthermore, friction between the wedge block and the slide block can also cause wear, thus affecting the stability of the adjustment. These factors can all lead to a decline in the performance of the expanding device during use. Utility Model Content

[0006] The main objective of this invention is to provide a spiral steel pipe end expansion device, which can effectively solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A spiral steel pipe end expansion device includes a base plate, a sliding device, a linear adjustment device, a support frame, a drive device, a transmission device, a heating component, a steel pipe to be expanded, and a positioning and clamping device. The sliding device and the linear adjustment device are mounted on the base plate. The sliding table of the sliding device achieves linear adjustment through the linear adjustment device. The support frame is mounted on the sliding table of the sliding device. The transmission device is mounted on the support frame. The drive device is mounted on the base plate and is connected to the transmission device on the support frame through a transmission belt. The positioning and clamping device is mounted on the base plate and clamps and fixes the steel pipe to be expanded. A heating component facing the transmission device is installed on the base plate.

[0009] The front end of the transmission device is connected to a limiting slide via a stabilizing seat, and a groove is formed inside the limiting slide. A slide seat is embedded in the groove and is connected to the slide seat via an adjusting screw. Rotating the adjusting screw drives the slide seat to move along the groove. A replaceable expansion head is installed at the front end of the slide seat. The transmission device drives the replaceable expansion head to rotate at the end of the steel pipe to be expanded, and works together with the heating component to achieve the expansion operation.

[0010] The stabilizing seat has a docking groove, and a stabilizing rod is inserted into the slide. The stabilizing rod passes through the opening and docking groove on the slide to achieve a stable connection between the stabilizing seat, the slide, and the replaceable expansion head.

[0011] As an optional solution of this application, the replaceable expanding head is provided with multiple limiting holes. The replaceable expanding head is divided into a frustum expanding head and a replacement rod. The replacement rod is located at the tail end of the frustum expanding head, and the limiting holes are evenly distributed on the replacement rod. The limiting holes are directly opposite the mating groove.

[0012] As an optional solution of this application, the adjusting screw and the limiting slide are connected by threads, and the adjusting screw is connected to the slide by a T-key and a T-ring. The T-ring is installed on the slide, and the T-key is embedded in the T-ring, so as to realize the movable connection between the adjusting screw and the slide.

[0013] As an optional solution of this application, the stabilizing insert includes a stabilizing round rod, a threaded portion and a limiting nut. The threaded portion is located at the two ends of the stabilizing round rod, and the limiting nut is sleeved on the threaded portion. The stabilizing insert is used to limit the adjustment of the slide distance.

[0014] As an optional solution of this application, the cross-section of the stabilizer is trapezoidal, the inclined surface of the stabilizer faces the slide, and the inclined surface of the stabilizer is provided with an anti-slip rubber pad.

[0015] As an optional solution of this application, the two sets of slides and adjusting screws are symmetrically distributed on the limiting slide, and the replaceable expansion heads are symmetrically arranged.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By restricting the cooperation between the carriage and the slide block, and by precisely adjusting the adjusting screw, accurate control of the position of the replaceable expanding head is achieved, thereby improving the accuracy and efficiency of the expanding operation. This ability to precisely adjust allows the device to adapt to the expanding needs of steel pipes of different specifications and sizes, enhancing the versatility and flexibility of the equipment.

[0018] The design of the stabilizing base and stabilizing rod effectively ensures the stability of the replaceable expansion head during use. The trapezoidal cross-section design of the stabilizing base and the anti-slip rubber pad increase the stability and service life of the device, while the stabilizing rod further ensures the stability of the device during operation by limiting the movement distance of the slide. This stability design helps improve the safety and reliability of the expansion operation, avoiding operational errors and safety hazards caused by equipment shaking or instability.

[0019] The replaceable expanding head design allows for easy replacement to meet different expanding requirements, thus improving the equipment's adaptability and flexibility. The combination of the limiting socket and stabilizing rod ensures the stability of the replaceable expanding head during installation and use, further enhancing the accuracy and efficiency of the expanding operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a side view of the overall structure of this utility model;

[0022] Figure 3 The diagram shows the transmission device, transmission belt, limiting carriage, and replaceable expansion head of this utility model.

[0023] Figure 4 This utility model includes a limiting carriage, adjusting screw, slide block, and replaceable expansion head.

[0024] Figure 5 for Figure 3 Enlarged diagram of point A in the middle.

[0025] In the diagram: 1. Base plate; 2. Sliding device; 3. Linear adjustment device; 4. Support frame; 5. Drive device; 6. Transmission device; 7. Limiting slide; 8. Slide groove; 9. Adjusting screw; 10. Slide seat; 11. Replaceable expansion head; 12. Limiting insertion hole; 13. Stabilizing rod; 14. Stabilizing seat; 15. Connecting groove; 16. Heating component; 17. Steel pipe to be expanded; 18. Positioning and clamping device. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 - Figure 5 As shown, a spiral steel pipe end-expanding device mainly consists of a base plate 1, a sliding device 2, a linear adjustment device 3, a support frame 4, a drive device 5, a transmission device 6, a heating component 16, a steel pipe 17 to be expanded, and a positioning and clamping device 18. The sliding device 2 and the linear adjustment device 3 are mounted on the base plate 1, with the sliding table of the sliding device 2 achieving precise linear adjustment via the linear adjustment device 3. The support frame 4 is mounted on the sliding table of the sliding device 2, while the transmission device 6 is mounted on the support frame 4. The drive device 5 is mounted on the base plate 1 and connected to the transmission device 6 on the support frame 4 via a transmission belt, thereby driving the operation of the entire device. The positioning and clamping device 18 is mounted on the base plate 1 and is used to clamp and fix the steel pipe 17 to be expanded. In addition, a heating component 16 is also installed on the base plate 1, facing the transmission device 6, for heating the steel pipe before the expansion operation.

[0028] The front end of the transmission device 6 is connected to a limiting slide 7 via a stabilizing seat 14. The limiting slide 7 has a sliding groove 8 inside, in which a slide block 10 is embedded, and is connected to the slide block 10 via an adjusting screw 9. By rotating the adjusting screw 9, the slide block 10 can be moved along the sliding groove 8, thereby achieving precise adjustment of the slide block 10's position. A replaceable expanding head 11 is installed at the front end of the slide block 10. Driven by the transmission device 6, the replaceable expanding head 11 rotates at the end of the steel pipe 17 to be expanded, and works in conjunction with the heating component 16 to achieve the expanding operation.

[0029] The stabilizing base 14 is provided with a docking groove 15, and a stabilizing rod 13 is inserted into the slide 10. The stabilizing rod 13 passes through the opening of the slide 10 and the docking groove 15, realizing a stable connection between the stabilizing base 14, the slide 10 and the replaceable expansion head 11. The replaceable expansion head 11 is provided with multiple limiting holes 12, which are divided into two parts: a frustum expansion head and a replacement rod. The replacement rod is located at the tail end of the frustum expansion head, and the limiting holes 12 are evenly distributed on the replacement rod, facing the docking groove 15, to ensure the stability of the replaceable expansion head 11 during use.

[0030] The adjusting screw 9 is connected to the limiting slide 7 by a thread, and is connected to the slide block 10 by a T-key and a T-ring. The T-ring is installed on the slide block 10, and the T-key is embedded in the T-ring, realizing the movable connection between the adjusting screw 9 and the slide block 10, thereby ensuring the flexible movement of the adjusting screw 9 on the slide block 10.

[0031] The stabilizing rod 13 includes a stabilizing round rod, a threaded portion, and a limiting nut. The threaded portion is located at both ends of the stabilizing round rod, and the limiting nut is sleeved on the threaded portion. The stabilizing rod 13 can limit the movement distance of the slide 10, ensuring the stability of the device during operation. The stabilizing rod 13 can both limit the adjustment of the slide 10 and ensure the stability of the replaceable expansion head 11 during adjustment.

[0032] The stabilizer 14 has a trapezoidal cross-section with its inclined surface facing the slide 10. Anti-slip rubber pads are provided on the inclined surface, which increases the stability and service life of the device.

[0033] Two sets of slide blocks 10 and adjusting screws 9 are symmetrically distributed on the limiting slide 7, and the replaceable expanding head 11 is also symmetrically arranged, making the device more balanced when performing the expanding operation, thereby improving the accuracy and efficiency of the expanding operation.

[0034] Prepare the steel pipe 17 to be expanded and place it on the positioning clamping device 18 for clamping and fixing. Start the heating component 16 to heat the steel pipe, softening the material and facilitating the expansion operation. Rotate the adjusting screw 9 to move the slide 10 along the slide groove 8, achieving precise adjustment of the slide 10's position. After confirming the slide 10's position is adjusted, install the replaceable expansion head 11 at the front end of the slide 10. Start the drive device 5; the transmission belt drives the transmission device 6, which in turn drives the replaceable expansion head 11 to rotate. The replaceable expansion head 11 rotates at the end of the steel pipe 17 to be expanded, working in conjunction with the heating component 16 to achieve the expansion operation.

[0035] The stability of the replaceable expanding head 11 during use is ensured by the stabilizing insert 13 and the limiting insert 12. The adjusting screw 9 is threadedly connected to the limiting slide 7 and connected to the slide block 10 via a T-key and a T-ring, ensuring flexible movement of the adjusting screw 9 on the slide block 10. The outer end of the adjusting screw 9 can be connected to a drive device to rotate the adjusting screw 9. This mechanism is existing technology and will not be described in detail. After confirming that the expanding operation is complete, turn off the heating assembly 16 and the drive device 5 to stop heating and rotation. Remove the expanded steel pipe and perform subsequent processing or inspection.

[0036] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spiral steel pipe end expanding device, comprising a base plate (1), a sliding device (2), a linear adjustment device (3), a support frame (4), a driving device (5), a transmission device (6), a heating assembly (16), a steel pipe to be expanded (17) and a positioning and clamping device (18), the sliding device (2) and the linear adjustment device (3) are installed on the base plate (1), the sliding table of the sliding device (2) is linearly adjusted through the linear adjustment device (3), the support frame (4) is installed on the sliding table of the sliding device (2), the transmission device (6) is installed on the support frame (4), the driving device (5) is installed on the base plate (1), the driving device (5) is connected with the transmission device (6) on the support frame (4) through a transmission belt, the positioning and clamping device (18) is installed on the base plate (1), and the steel pipe to be expanded (17) is clamped and fixed through the positioning and clamping device (18), the heating assembly (16) is installed on the base plate (1) and faces the transmission device (6), characterized in that: The front end of the transmission device (6) is connected to a limiting carriage (7) through a stabilizing seat (14), and the inside of the limiting carriage (7) is formed into a sliding groove (8). A sliding seat (10) is embedded in the groove of the sliding groove (8) and is connected with the sliding seat (10) through an adjusting screw (9). The rotating adjusting screw (9) drives the sliding seat (10) to move along the sliding groove (8). The front end of the sliding seat (10) is provided with a replaceable expanding head (11). The replaceable expanding head (11) is driven by the transmission device (6) to rotate at the port of the steel pipe to be expanded (17) and cooperates with a heating assembly (16) to realize the expanding operation. ​ The stabilizing seat (14) is provided with a butt joint groove (15), and the sliding seat (10) is provided with a stabilizing insertion rod (13). The stabilizing insertion rod (13) passes through the hole in the sliding seat (10) and the butt joint groove (15) to stably connect the stabilizing seat (14), the sliding seat (10) and the replaceable expanding head (11).

2. A device for expanding the ends of helical steel pipe according to claim 1, characterized in that: A plurality of limiting insertion holes (12) are formed in the replaceable expanding head (11). The replaceable expanding head (11) is divided into a circular truncated cone expanding head and a replacement rod. The replacement rod is located at the tail end of the circular truncated cone expanding head. The limiting insertion holes (12) are equidistantly distributed on the replacement rod. The limiting insertion holes (12) are opposite to the butt joint groove (15).

3. A device for expanding the ends of helical steel pipe according to claim 1 or 2, characterised in that: The adjusting screw (9) is connected with the limiting carriage (7) through threads. The adjusting screw (9) is connected with the sliding seat (10) through a T-shaped key and a T-shaped sleeve ring. The T-shaped sleeve ring is installed on the sliding seat (10), and the T-shaped key is embedded in the T-shaped sleeve ring to achieve the movable connection between the adjusting screw (9) and the sliding seat (10).

4. A device for expanding the ends of helical steel pipe according to claim 3, characterized in that: The stabilizing insertion rod (13) includes a stabilizing round rod, a threaded part and a limiting nut. The threaded part is located at the two rod heads of the stabilizing round rod. The limiting nut is sleeved on the threaded part to limit the distance adjustment of the sliding seat (10) through the stabilizing insertion rod (13).

5. A device for expanding the ends of helical steel pipe according to claim 4, characterised in that: The cross section of the stabilizing seat (14) is designed in a trapezoidal shape. The inclined surface of the stabilizing seat (14) is opposite to the sliding seat (10). The inclined surface of the stabilizing seat (14) is provided with an anti-skid rubber gasket.

6. A device for expanding the ends of helical steel pipe according to claim 5, characterized in that: Two groups of the sliding seat (10) and the adjusting screw (9) are symmetrically distributed on the limiting carriage (7), and the replaceable expanding head (11) is symmetrically arranged.

Images