Flange pipe fixing tool
By designing a fixed sleeve and clamp assembly, and using a driving component and trapezoidal pins to fix the flange pipe, the problem of inaccurate positioning of the flange pipe during bending is solved, achieving a high-precision and stable flange pipe fixing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JIANGNAN SHIPBUILDING PIPE SYST CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing technology, during the bending process of flange pipes, the clamps are not stable, which causes the axis of the flange pipes to be not on the same horizontal line, affecting the positioning accuracy and the accuracy of the bending angle.
The system employs a fixed sleeve and clamp assembly. A drive component drives the clamp blocks to slide within the fixed sleeve, causing multiple clamp blocks to converge and clamp the flange pipe through a locking groove. Combined with trapezoidal pins and locking components, the flange pipe is secured, ensuring that the axis of the flange pipe is coaxial with the axis of the sleeve, thus improving positioning accuracy.
This achieves high-precision positioning of flange pipes, reduces displacement and tilting of flange pipes during bending, improves the accuracy and stability of bending angles, and reduces maintenance costs.
Smart Images
Figure CN224497843U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of pipe fixing, and in particular to a flange pipe fixing tool. Background Technology
[0002] Flanges are typically circular metal discs with multiple bolt holes evenly distributed around their circumference. Bolts are used to connect two flanges, ensuring their sealing surfaces are in contact to form a sealed connection. Flange connections are a common method of pipe connection in piping engineering. Currently, in practical applications, pipes often need to be bent to change their routing according to usage requirements.
[0003] In related technologies, one end of the pipe is usually fixed with a clamp before bending. However, when bending a pipe with a flange at the end, the flange is prone to tilting when fixed with a clamp due to the thin wall thickness of the flange. This causes the flange axis to be misaligned, affecting the positioning accuracy of the flange and resulting in an inaccurate bending angle. Summary of the Invention
[0004] To improve the positioning accuracy of flange pipes, this application provides a flange pipe fixing fixture, which has the effect of improving the positioning accuracy of flange pipes.
[0005] The flange pipe fixing fixture provided in this application adopts the following technical solution:
[0006] A flange pipe fixing fixture includes a fixing sleeve and a clamp assembly fitted inside the fixing sleeve. The fixing sleeve is provided with a driving member for driving the clamp assembly to slide within the fixing sleeve. The diameter of the fixing sleeve gradually decreases from the end away from the driving member to the end closer to the driving member. The clamp assembly includes multiple separately arranged clamp blocks with gaps between adjacent clamp blocks. Each clamp block has a locking groove for accommodating the flange pipe at the end away from the driving member. The locking grooves converge into a ring. Under the action of the driving member, the clamp blocks converge within the fixing sleeve and clamp the flange pipe through the locking grooves on their surfaces.
[0007] By adopting the above technical solution, the inner wall of the fixed sleeve is provided with a sloped surface, which can convert the axial tensile force of the driving component into the radial contraction force of multiple clamping blocks, enabling the multiple clamping blocks to clamp the flange pipe. When the driving component is not working, there is a gap between the multiple adjacent clamping blocks. When fixing the flange pipe, the outer peripheral wall of the flange pipe is first aligned with the inner wall of the clamping groove. The driving component drives the multiple clamping blocks to move in a straight line within the fixed sleeve. Since the outer walls of the multiple clamping blocks abut against the inner wall of the fixed sleeve, the multiple clamping blocks gradually move towards the center until the flange pipe is tightly clamped in the clamping groove, thus achieving the fixing of the flange pipe. Moreover, the axis of the flange pipe and the axis of the fixed sleeve are on the same horizontal line, that is, this application can improve the positioning accuracy of the flange pipe.
[0008] Optionally, both of the opposing clamp blocks have trapezoidal grooves on their surfaces. The depth of the trapezoidal groove is the same as the length of the clamp block. A trapezoidal pin that is adapted to the trapezoidal groove is slidably fitted inside the trapezoidal groove. The end of the trapezoidal pin away from the trapezoidal groove is located in the locking groove.
[0009] By adopting the above technical solution, the trapezoidal pin is slidably installed in the trapezoidal groove, allowing for adjustment of its position within the groove. Multiple bolt holes are provided on the flange, and the trapezoidal pin, protruding from the inner wall of the locking groove, can be inserted into these bolt holes, thus fixing the flange pipe and reducing its displacement, further improving the positioning accuracy of the flange pipe.
[0010] Optionally, the trapezoidal pin includes a sliding seat and a screw, one end of which passes through the sliding seat and is threadedly connected to the sliding seat.
[0011] By adopting the above technical solution, the screw and the sliding seat are detachably connected, allowing for the replacement of screws of different diameters to fit different flanges, which helps to improve the adaptability of the screw.
[0012] Optionally, the end of the screw away from the sliding seat is fitted with a locking device to fix the flange tube onto the screw.
[0013] By adopting the above technical solution, when the end of the screw away from the sliding seat is inserted into the bolt hole on the flange, the flange pipe can be fixed on the screw by the locking part and the screw thread, reducing the displacement of the flange pipe and effectively improving the stability of the flange pipe.
[0014] Optionally, the diameter of the end of the fixing sleeve away from the driving component is smaller than the diameter formed by the multiple clamping blocks before they converge inside the fixing sleeve.
[0015] By adopting the above technical solution, when the driving component drives multiple clamping blocks to move linearly within the fixed sleeve, the outer walls of the multiple clamping blocks slide against the inner wall of the fixed sleeve until the flange pipe is clamped. At this time, the multiple clamping blocks form a stable clamping force on the flange pipe, which can reduce the clamping blocks from continuing to clamp the flange pipe and improve the stability of the multiple clamping blocks clamping the flange pipe.
[0016] Optionally, each of the multiple clamp blocks has a weight-reducing hole along its length.
[0017] By adopting the above technical solution, the weight of multiple clamping blocks can be reduced by opening weight-reducing holes on the multiple clamping blocks, which is beneficial to improving the stability of the multiple clamping blocks in linear motion on the fixed sleeve.
[0018] Optionally, a disc is connected to one end of the clamp assembly composed of multiple clamp blocks near the drive component. The disc is nested inside a fixed sleeve, and the output end of the drive component passes through the end of the fixed sleeve and is fixed to the disc.
[0019] By adopting the above technical solution, multiple clamping blocks are fixedly connected to the side wall of the disc near the end of the drive component, which facilitates the disassembly and replacement of multiple clamping blocks and reduces maintenance costs.
[0020] Optionally, the bottom of the fixed sleeve is provided with a support frame to support the fixed sleeve.
[0021] By adopting the above technical solution, the support frame can bear the weight of the fixed sleeve and multiple clamping blocks, which can reduce the deformation of the fixed sleeve and improve the stability of the multiple clamping blocks clamping the flange pipe.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. In the initial state, there is a gap between adjacent clamping blocks. First, align the outer peripheral wall of the flange with the inner wall of the clamping groove. The driving component drives multiple clamping blocks to move linearly in the fixed sleeve. The outer walls of the multiple clamping blocks slide and abut against the inner wall of the fixed sleeve, so that the multiple clamping blocks move centripetally and gradually clamp the flange pipe, thereby fixing the flange pipe. The axis of the flange pipe and the axis of the fixed sleeve are on the same horizontal line, which effectively improves the positioning accuracy of the flange pipe.
[0024] 2. By inserting the end of the trapezoidal pin into the bolt hole of the flange, the flange pipe can be fixed, reducing the displacement of the flange pipe and improving the positioning accuracy of the flange pipe.
[0025] 3. By fixing multiple clamping blocks near the end of the drive component to the disc, the multiple clamping blocks move linearly in sync with the disc within the fixed sleeve, making it easy to disassemble and replace multiple clamping blocks and reducing maintenance costs. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of the flange pipe fixing fixture in this application;
[0027] Figure 2 This is a cross-sectional structural diagram of the flange pipe fixing fixture of this application.
[0028] Reference numerals: 1. Fixing sleeve; 2. Clamp assembly; 201. Clamp block; 3. Driving component; 4. Engraving groove; 5. Trapezoidal groove; 6. Trapezoidal pin; 601. Sliding seat; 602. Screw; 7. Locking component; 8. Weight reduction hole; 9. Disc; 10. Support frame. Detailed Implementation
[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.
[0030] This application discloses a flange pipe fixing fixture, referring to... Figure 1 and Figure 2 The system includes a fixed sleeve 1 and a support frame 10, with the fixed sleeve 1 fixed to the top of the support frame 10. One end of the fixed sleeve 1 is open, and the diameter of the fixed sleeve 1 gradually decreases from the open end to the closed end. A clamping assembly 2 is slidably disposed inside the fixed sleeve 1, and a driving member 3 is disposed at the closed end of the fixed sleeve 1. In this embodiment, the driving member 3 is a linear drive motor, the output end of which passes through the closed end of the fixed sleeve 1 and is fixedly connected to the end of the clamping assembly 2. The driving member 3 drives the clamping assembly 2 to slide and engage within the fixed sleeve 1. The clamping assembly 2 consists of four clamping blocks 201 spaced apart circumferentially. Each of the four clamping blocks 201 has an arc-shaped locking groove 4 at the end away from the linear drive motor. When the linear drive motor drives the four clamping blocks 201 to close radially, the four locking grooves 4 combine to form an annular clamping area, achieving circumferential wrapping fixation of the flange pipe.
[0031] First, align the outer circumferential wall of the flange pipe with the clamping groove 4, then start the linear drive to drive the four clamping blocks 201 to move axially along the fixed sleeve 1. The outer walls of the four clamping blocks 201 abut against the inner wall of the fixed sleeve 1 and move concentrically, thereby clamping the flange pipe in the clamping groove 4, and the axis of the flange pipe and the axis of the fixed sleeve 1 are on the same horizontal line, that is, this application can improve the positioning accuracy of the flange pipe.
[0032] Reference Figure 2 Four clamping blocks 201 are fixedly connected to a disc 9 at one end near the linear drive motor. The disc 9 is located inside the fixed sleeve 1. The output end of the linear drive motor passes through the closed end of the fixed sleeve 1 and is fixedly connected to the side wall of the disc 9. The clamping blocks 201 are detachably connected to the fixed sleeve 1, which facilitates the replacement and disassembly of the clamping blocks 201 and helps reduce maintenance costs.
[0033] Reference Figure 1 The ends of the four clamping blocks 201 furthest from the linear drive are located outside the fixed sleeve 1. The diameter of the fixed sleeve 1 furthest from the linear drive is smaller than the diameter formed by the clamping blocks 201 before they converge inside the fixed sleeve. When the linear drive drives the four clamping blocks 201 to move linearly within the fixed sleeve 1, the outer walls of the four clamping blocks 201 abut against the inner wall of the fixed sleeve 1, which helps the four clamping blocks 201 form a stable clamping force on the flange pipe and improves the stability of the flange pipe.
[0034] Reference Figure 1 Each of the four clamping blocks 201 has two weight-reducing holes 8 along the axial direction. The weight-reducing holes 8 on the clamping blocks 201 with trapezoidal grooves 5 are located on both sides of the trapezoidal grooves 5. The weight-reducing holes 8 can reduce the weight of the clamping blocks 201, which is beneficial to improving the stability of the clamping blocks 201 moving in a straight line within the fixed sleeve 1.
[0035] Reference Figure 1 Two symmetrically distributed clamping blocks 201 each have trapezoidal grooves 5 on their surfaces. These grooves extend along the length of the clamping block 201, and their width gradually increases from the opening to the bottom. Trapezoidal pins 6, adapted to the grooves 5, slide within each groove. These pins move radially within the grooves, with one end protruding from the inner wall of the locking groove 4. The end of the trapezoidal pin 6 can be inserted into the bolt holes on the flange, securing the flange and reducing displacement, thus effectively improving its stability.
[0036] Reference Figure 2 The trapezoidal pin 6 consists of a sliding seat 601 and a screw 602. The sliding seat 601 has a connecting hole with internal threads, and the outer wall of the screw 602 has external threads. The screw 602 is screwed into the inner wall of the connecting hole and threadedly fixed to the sliding seat 601. By replacing the screw 602 with different diameters, it can be adapted to different flange pipes, which helps to improve the adaptability of the screw 602.
[0037] Reference Figure 2 A locking element 7 is fitted onto the end of the screw 602 away from the trapezoidal groove 5. In this embodiment, the locking element 7 is a locking nut. After the end of the screw 602 is inserted into the bolt hole on the flange, the flange pipe can be fixed to the screw 602 by the locking nut, which effectively improves the stability of the flange pipe in the locking groove 4.
[0038] The implementation principle of a flange pipe fixing fixture disclosed in this application is as follows: When the linear drive is not started, there is a gap between adjacent clamping blocks 201; first, align the outer peripheral wall of the flange pipe with the inner wall of the clamping groove 4, then align the bolt holes on the flange with the two opposite screws 602, and fix the lock nut with the screws 602, then drive the linear drive, the output end of the linear drive drives the disc 9 and the four clamping blocks 201 to move linearly in the fixed sleeve 1, the four clamping blocks 201 slide against the inner wall of the fixed sleeve 1, so that the four clamping blocks 201 move closer to the center and clamp the flange pipe in the clamping groove 4, thereby achieving the clamping and fixing of the flange pipe; by clamping the flange pipe in the clamping groove 4 and the trapezoidal pin 6, the axis of the flange pipe and the axis of the fixed sleeve 1 can be located on the same horizontal line, effectively improving the positioning accuracy of the flange pipe.
[0039] 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 flange pipe fixing fixture, characterized in that: The device includes a fixed sleeve (1) and a clamp assembly (2) fitted inside the fixed sleeve (1). The fixed sleeve (1) is provided with a driving member (3) that drives the clamp assembly (2) to slide inside the fixed sleeve (1). The diameter of the fixed sleeve (1) gradually decreases from the end away from the driving member (3) to the end closer to the driving member (3). The clamp assembly (2) includes multiple clamp blocks (201) that are separately arranged. There is a gap between the multiple adjacent clamp blocks (201). Each clamp block (201) has a clamping groove (4) for accommodating the flange pipe at the end away from the driving member (3). The multiple clamping grooves (4) converge into a ring. Under the action of the driving member (3), the multiple clamp blocks (201) converge inside the fixed sleeve (1) and clamp the flange pipe through the clamping grooves (4) on the surface.
2. The flange pipe fixing fixture according to claim 1, characterized in that, The two phases described A trapezoidal groove (5) is provided on the surface of the clamping block (201). The depth direction of the trapezoidal groove (5) is the same as the length direction of the clamping block (201). A trapezoidal pin (6) adapted to the trapezoidal groove (5) is slidably fitted inside the trapezoidal groove (5). The end of the trapezoidal pin (6) away from the trapezoidal groove (5) is located in the snap-fit groove (4).
3. The flange pipe fixing fixture according to claim 2, characterized in that, The trapezoidal pin (6) includes a sliding seat (601) and a screw (602), one end of which passes through the sliding seat (601) and is threadedly connected to the sliding seat (601).
4. The flange pipe fixing fixture according to claim 3, characterized in that, The end of the screw (602) away from the sliding seat (601) is fitted with a locking element (7) to fix the flange pipe to the screw (602).
5. The flange pipe fixing fixture according to claim 1, characterized in that, The diameter of the end of the fixed sleeve (1) away from the driving member (3) is smaller than the diameter formed by the multiple clamping blocks (201) before they are gathered together inside the fixed sleeve (1).
6. The flange pipe fixing fixture according to claim 1, characterized in that, The multiple clamp blocks (201) are provided with weight reduction holes (8) along the length direction of the clamp block (201).
7. The flange pipe fixing fixture according to claim 1, characterized in that, Multiple clamping blocks (201) are connected to a disc (9) at one end near the drive member (3). The disc (9) is nested inside the fixed sleeve (1). The output end of the drive member (3) passes through the end of the fixed sleeve (1) and is fixed to the disc (9).
8. The flange pipe fixing fixture according to claim 1, characterized in that, The bottom of the fixed sleeve (1) is provided with a support frame (10) to support the fixed sleeve (1).