Telescopic support leg for pipe clamps

Abstract

A telescopic supporting leg for pipe fixture relates to the technical field of pipe welding. In order to solve the problem that the fixture needs to be adjusted when clamping pipes with different diameters, a manually adjustable and lockable supporting leg is developed. Four supporting legs are installed on the supporting leg seat of the pipe fixture. The pipe pressure acts on the rollers, the nut moves axially along the supporting leg shaft, and the screw rotates in place through the supporting bearing. When the upper clutch is pressed, the upper clutch dog tooth engages with the lower clutch dog tooth, the upper clutch bead groove moves to the screw sleeve bead hole position, the button is popped up under the action of the button spring, the limiting ball is squeezed into the upper clutch bead groove, the upper clutch is locked, the supporting leg position is locked, and the pipe is clamped. When the button is pressed, the button bead groove moves to the screw sleeve bead hole position, the upper clutch is popped up under the action of the clutch spring, the dog tooth is disengaged, the limiting ball is squeezed into the button bead groove, and the supporting leg returns to the free movement state. The utility model is suitable for pipe welding tools.

Description

Technical Field

[0001] This utility model relates to the field of pipeline welding technology, specifically to a telescopic support leg for a pipeline clamp. Background Technology

[0002] In the construction of long-distance pipelines, the lack of heavy equipment on-site makes manual welding slow and of inconsistent quality, especially for large-diameter pipelines. Currently, the automatic welding and cutting equipment on the market is mainly benchtop-type, equipped with pipe-turning machines for automated welding. Small-scale pipe welding machines are primarily capable of on-site automatic welding, but they can only weld relatively small pipes and can only weld one type of pipe; they cannot cut. Existing pipe cutting machines have the advantage of a large cutting span, but the disadvantage is that they can only cut and not weld. For example, imported German pipe welding equipment has the advantages of automatic welding and high precision, but the disadvantage is that different pipes require different rails, which are complicated to install and expensive.

[0003] In summary, existing pipe welding equipment cannot adjust the size of the pipe clamping opening, which makes it impossible to weld pipes of different outer diameters, resulting in poor versatility. Utility Model Content

[0004] This invention addresses the problem that existing pipe welding devices cannot adjust the size of the pipe clamping opening, thus preventing the welding of pipes with different outer diameters and resulting in poor versatility. A telescopic support leg for a pipe clamp is proposed.

[0005] This utility model discloses a telescopic support leg for a pipe clamp, which comprises a roller frame 1, a roller 2, a linear bearing support 3, an inner nut sleeve 4, an outer nut sleeve 5, a main spring 6, a linear bearing 7, a lead screw 8, a lead screw nut 9, a support bearing 11, a clutch spring 12, a lower clutch 13, an upper clutch linear bearing 16, an upper clutch 17, a lead screw sleeve 18, a button 19, a button linear bearing 20, a button spring 21, and a support leg housing 23.

[0006] The support leg housing 23 is cylindrical. A nut sleeve 5 is located at one end of the inner side of the support leg housing 23. A linear bearing 7 is positioned between the outer surface of the nut sleeve 5 and the inner wall of the support leg housing 23. Multiple grooves are machined circumferentially on both the inner wall of the support leg housing 23 and the outer wall of the nut sleeve 5. The outer sides of the balls of the linear bearing 7 are in rolling connection with the grooves on the support leg housing 23, and the inner sides of the balls of the linear bearing 7 are in rolling connection with the grooves on the nut sleeve 5. A linear bearing support 3 is located on the inner wall of one end of the support leg housing 23. The linear bearing support 3 is fixedly connected to the inner wall of the support leg housing 23. The end of the linear bearing 7 is axially limited by the linear bearing support 3. The end of the nut outer sleeve 5 is provided with a roller frame 1, and a roller 2 is provided on the roller frame 1. The nut inner sleeve 4 is provided inside the nut outer sleeve 5. The ends of the nut inner sleeve 4 and the nut outer sleeve 5 are both fixedly connected to the bottom surface of the roller frame 1. The main spring 6 is fitted on the nut inner sleeve 4. A lead screw nut 9 is embedded in one end of the nut inner sleeve 4. One end of the lead screw 8 is threadedly connected to the lead screw nut 9. After passing through two support bearings 11 in sequence, the other end is inserted into the center hole of the screw sleeve 18 and fixed. A button 19 is embedded in the center hole of the screw sleeve 18. The button 19 is sleeved on the other end of the lead screw 8. A button linear bearing 20 is provided between the inner wall of the button 19 and the outer surface of the lead screw 8. A button spring 21 is provided between the top of the button 19 and the end face of the lead screw 8. A lower clutch 13 and an upper clutch 17 are provided from left to right on the outer surface of the screw sleeve 18. The lower clutch 13 is fixed to the inner wall of the support leg housing 23. A clutch spring 12 is sleeved on the screw sleeve 18. A limiting boss is machined on the outer surface end of the screw sleeve 18. One end of the clutch spring 12 contacts the limiting boss on the screw sleeve 18. The other end of the clutch spring 12 contacts the bottom of the upper clutch 17. An upper clutch linear bearing 16 is provided between the outer surface of the upper clutch 17 and the inner wall of the other end port of the support leg housing 23. The lower clutch dog tooth 14 of the lower clutch 13 is engaged with the upper clutch dog tooth 15 of the upper clutch 17.

[0007] Furthermore, a bearing support 10 is embedded in the center of the interior of the support leg housing 23, and the bearing support 10 is used to support the two support bearings 11.

[0008] Furthermore, the outer surface of the button 19 is machined with a button ball groove 22 along the circumferential direction, and the outer surface of the screw sleeve 18 is evenly machined with at least three ball limiting holes 25 along the circumferential direction.

[0009] Furthermore, a limiting ball 24 is provided inside the ball limiting hole 25;

[0010] Furthermore, the inner surface of the upper clutch 17 is machined with an upper clutch ball groove 17-1 along the circumferential direction;

[0011] Furthermore, the button 19 is slidably connected to the lead screw 8 via the button linear bearing 20;

[0012] Furthermore, the inner nut sleeve 4, outer nut sleeve 5, main spring 6, lead screw 8, lead screw nut 9, clutch spring 12, lower clutch 13, lead screw sleeve 18, button 19, button spring 21 and support leg housing 23 are coaxially arranged;

[0013] Furthermore, during use, the four support legs are installed at the pipe clamp of the pipe welding device and are arranged circumferentially. When pressure is applied to the roller 2, the nut moves along the axial direction of the support leg 4 through the linear bearing 7. At the same time, the lead screw 8 rotates in place against the support bearing 11. When the upper clutch is pressed, the upper clutch teeth and the lower clutch teeth mesh. At this time, the upper clutch ball groove 17-1 moves to the position of the ball limit hole 25. At this time, the button 19 pops up under the action of the button spring 21, squeezing the limit ball 24 into the upper clutch ball groove 17-1, locking the upper clutch position, locking the nut sleeve 5 position, and clamping the pipe with the four support legs 4, fixing the length. When button 19 is pressed, button ball groove 22 moves to the position of ball limit hole 25. The upper clutch springs up under the action of the clutch spring, squeezing the limit ball 24 into button ball groove 22. The upper clutch dog tooth disengages from the lower clutch dog tooth, the lead screw 8 resumes its ability to rotate in place, the nut sleeve 5 resumes its ability to move up and down, and button 19 is locked in position.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention overcomes the shortcomings of existing technologies by installing at least four support legs at the pipe clamp of the pipe welding device, arranged circumferentially. When pressure is applied to the rollers or the main spring, the nut moves axially along the support legs. Simultaneously, the lead screw rotates in place via the support bearing and linear bearing. When the upper clutch is pressed, the upper clutch teeth engage with the lower clutch teeth, causing the upper clutch ball groove to move to the button ball groove position. The button springs up, squeezing the limit ball into the upper clutch ball groove, locking the upper clutch position and the nut outer sleeve position. The four support legs extend and clamp the pipe to be welded, fixing their length and achieving a self-locking function. This allows for adjustment of the size of the pipe clamp on the pipe welding device, enabling clamping and welding of pipes of different diameters, thus improving the device's versatility. Furthermore, by installing four support legs of this structure at the pipe clamp of the pipe welding device and synchronously controlling them using existing electrical control principles, the clamped pipe can be made coaxial with the pipe welding device, improving welding quality. Attached Figure Description

[0016] Figure 1 This is a front sectional view of a telescopic support leg for a pipe clamp according to the present invention;

[0017] Figure 2 This is a sectional view of a telescopic support leg for a pipe clamp according to the present invention. Detailed Implementation

[0018] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a telescopic support leg for a pipe clamp, comprising a roller frame 1, rollers 2, a linear bearing support 3, an inner nut sleeve 4, an outer nut sleeve 5, a main spring 6, a linear bearing 7, a lead screw 8, a lead screw nut 9, a support bearing 11, a clutch spring 12, a lower clutch 13, an upper clutch linear bearing 16, an upper clutch 17, a lead screw sleeve 18, a button 19, a button linear bearing 20, a button spring 21, and a support leg housing 23.

[0019] The support leg housing 23 is cylindrical. A nut sleeve 5 is located at one end of the inner side of the support leg housing 23. A linear bearing 7 is positioned between the outer surface of the nut sleeve 5 and the inner wall of the support leg housing 23. Multiple grooves are machined circumferentially on both the inner wall of the support leg housing 23 and the outer wall of the nut sleeve 5. The outer sides of the balls of the linear bearing 7 are in rolling connection with the grooves on the support leg housing 23, and the inner sides of the balls of the linear bearing 7 are in rolling connection with the grooves on the nut sleeve 5. A linear bearing support 3 is located on the inner wall of one end of the support leg housing 23. The linear bearing support 3 is fixedly connected to the inner wall of the support leg housing 23. The end of the linear bearing 7 is axially limited by the linear bearing support 3. The end of the nut outer sleeve 5 is provided with a roller frame 1, and a roller 2 is provided on the roller frame 1. The nut inner sleeve 4 is provided inside the nut outer sleeve 5. The ends of the nut inner sleeve 4 and the nut outer sleeve 5 are both fixedly connected to the bottom surface of the roller frame 1. The main spring 6 is fitted on the nut inner sleeve 4. A lead screw nut 9 is embedded in one end of the nut inner sleeve 4. One end of the lead screw 8 is threadedly connected to the lead screw nut 9. After passing through two support bearings 11 in sequence, the other end is inserted into the center hole of the screw sleeve 18 and fixed. A button 19 is embedded in the center hole of the screw sleeve 18. The button 19 is sleeved on the other end of the lead screw 8. A button linear bearing 20 is provided between the inner wall of the button 19 and the outer surface of the lead screw 8. A button spring 21 is provided between the top of the button 19 and the end face of the lead screw 8. A lower clutch 13 and an upper clutch 17 are provided from left to right on the outer surface of the screw sleeve 18. The lower clutch 13 is fixed to the inner wall of the support leg housing 23. A clutch spring 12 is sleeved on the screw sleeve 18. A limiting boss is machined on the outer surface end of the screw sleeve 18. One end of the clutch spring 12 contacts the limiting boss on the screw sleeve 18. The other end of the clutch spring 12 contacts the bottom of the upper clutch 17. An upper clutch linear bearing 16 is provided between the outer surface of the upper clutch 17 and the inner wall of the other end port of the support leg housing 23. The lower clutch dog tooth 14 of the lower clutch 13 is engaged with the upper clutch dog tooth 15 of the upper clutch 17.

[0020] In this specific embodiment, during use, four support legs are installed at the pipe clamp of the pipe welding device and arranged circumferentially. When pressure is applied to the roller 2, the nut moves along the axial direction of the support leg 4 through the linear bearing 7. At the same time, the lead screw 8 rotates in place on the support bearing 11. When the upper clutch is pressed, the upper clutch teeth and the lower clutch teeth mesh. At this time, the upper clutch ball groove 17-1 moves to the position of the ball limiting hole 25. At this time, the button 19 pops up under the action of the button spring 21, squeezing the limiting ball 24 into the upper clutch ball groove 17-1, locking the upper clutch position, locking the nut sleeve 5 position, and clamping the pipe with the four support legs 4, fixing the length. When button 19 is pressed, button ball groove 22 moves to the position of ball limit hole 25. The upper clutch springs up under the action of the clutch spring, squeezing the limit ball 24 into button ball groove 22. The upper clutch dog tooth disengages from the lower clutch dog tooth, the lead screw 8 resumes its ability to rotate in place, the nut sleeve 5 resumes its ability to move up and down, and button 19 is locked in position.

[0021] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment further defines the support leg described in Specific Embodiment 1. In this embodiment, a telescopic support leg for a pipe clamp is provided, wherein a bearing support 10 is embedded in the center of the support leg housing 23, and the bearing support 10 is used to support two support bearings 11.

[0022] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment further defines the support leg described in Specific Embodiment 1. In this embodiment, a telescopic support leg for a pipe clamp is provided. The outer surface of the button 19 is machined with a button ball groove 22 along the circumferential direction, and the outer surface of the screw sleeve 18 is evenly machined with at least three ball limit holes 25 along the circumferential direction.

[0023] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment further defines the support leg described in Specific Embodiment Three. In this embodiment, a telescopic support leg for a pipe clamp is provided, wherein the ball limiting hole 25 is provided with limiting balls 24.

[0024] Specific Implementation Method Five: Combining Figure 1 and Figure 2 This embodiment further defines the support leg described in Specific Embodiment 1. In this embodiment, a telescopic support leg for a pipe clamp is provided, wherein the inner surface of the upper clutch 17 is machined with an upper clutch ball groove 17-1 along the circumferential direction.

[0025] Specific Implementation Method Six: Combination Figure 1 and Figure 2 This embodiment further defines the support leg described in Specific Embodiment 1. In this embodiment, a telescopic support leg for a pipe clamp is provided, wherein the button 19 and the lead screw 8 are slidably connected via a button linear bearing 20.

[0026] Specific implementation method seven: Combining Figure 1 and Figure 2 This embodiment further defines the support leg described in Specific Embodiment 1. In this embodiment, a telescopic support leg for a pipe clamp is provided, wherein the inner nut sleeve 4, outer nut sleeve 5, main spring 6, lead screw 8, lead screw nut 9, clutch spring 12, lower clutch 13, lead screw sleeve 18, button 19, button spring 21, and support leg housing 23 are coaxially arranged.

[0027] Working principle

[0028] In use, the four support legs are installed at the pipe clamp of the pipe welding device and are arranged circumferentially. When pressure is applied to the roller 2, the nut moves along the axial direction of the support leg 4 through the linear bearing 7. At the same time, the lead screw 8 rotates in place on the support bearing 11. When the upper clutch is pressed, the upper clutch teeth and the lower clutch teeth mesh. At this time, the upper clutch ball groove 17-1 moves to the position of the ball limit hole 25. At this time, the button 19 pops up under the action of the button spring 21, squeezing the limit ball 24 into the upper clutch ball groove 17-1, locking the upper clutch position, locking the nut sleeve 5 position, and clamping the pipe with the four support legs 4, fixing the length. When button 19 is pressed, button ball groove 22 moves to the position of ball limit hole 25. The upper clutch springs up under the action of the clutch spring, squeezing the limit ball 24 into button ball groove 22. The upper clutch dog tooth disengages from the lower clutch dog tooth, the lead screw 8 resumes its ability to rotate in place, the nut sleeve 5 resumes its ability to move up and down, and button 19 is locked in position.

Claims

1. A telescopic support leg for a pipe clamp, characterized in that: It includes a roller frame (1), roller (2), linear bearing support (3), nut inner sleeve (4), nut outer sleeve (5), main spring (6), linear bearing (7), lead screw (8), lead screw nut (9), support bearing (11), clutch spring (12), lower clutch (13), upper clutch linear bearing (16), upper clutch (17), screw outer sleeve (18), button (19), button linear bearing (20), button spring (21), and support leg housing (23). The support leg housing (23) is cylindrical. A nut sleeve (5) is provided at one end of the inner side of the support leg housing (23). A linear bearing (7) is provided between the outer surface of the nut sleeve (5) and the inner wall of the support leg housing (23). Multiple grooves are machined along the circumferential direction on the inner wall of the support leg housing (23) and the outer wall of the nut sleeve (5). The outer side of the ball of the linear bearing (7) is in rolling connection with the groove on the support leg housing (23), and the inner side of the ball of the linear bearing (7) is in rolling connection with the groove on the nut sleeve (5). A linear bearing support (3) is provided on the inner wall of one end of the support leg housing (23). The support (3) is fixed to the inner wall of the support leg housing (23). The end of the linear bearing (7) is axially limited by the linear bearing support (3). The end of the nut outer sleeve (5) is provided with a roller frame (1). The roller frame (1) is provided with a roller (2). The nut outer sleeve (5) is provided with a nut inner sleeve (4). The ends of the nut inner sleeve (4) and the nut outer sleeve (5) are fixed to the bottom surface of the roller frame (1). The nut inner sleeve (4) is provided with a main spring (6). One end of the nut inner sleeve (4) is embedded with a screw nut (9). One end of the screw rod (8) is threadedly connected to the screw nut (9). The other end of the screw (8) passes through two support bearings (11) in sequence and is then inserted into the center hole of the screw sleeve (18) for fixation. A button (19) is embedded in the center hole of the screw sleeve (18). The button (19) is sleeved on the other end of the screw (8). A button linear bearing (20) is provided between the inner wall of the button (19) and the outer surface of the screw (8). A button spring (21) is provided between the top of the button (19) and the end face of the screw (8). A lower clutch (13) and an upper clutch (17) are provided from left to right on the outer surface of the screw sleeve (18). The lower clutch (13) is connected to the support leg housing. (23) is fixed to the inner wall, and a clutch spring (12) is sleeved on the screw sleeve (18). A limiting boss is machined on the outer surface end of the screw sleeve (18). One end of the clutch spring (12) contacts the limiting boss on the screw sleeve (18), and the other end of the clutch spring (12) contacts the bottom of the upper clutch (17). An upper clutch linear bearing (16) is provided between the outer surface of the upper clutch (17) and the inner wall of the other end port of the support leg housing (23). The lower clutch dog tooth (14) of the lower clutch (13) is engaged with the upper clutch dog tooth (15) of the upper clutch (17).

2. The telescopic support leg for a pipe clamp according to claim 1, characterized in that: The support leg housing (23) has a bearing support (10) embedded in the center of its interior. The bearing support (10) is used to support two support bearings (11).

3. The telescopic support leg for a pipe clamp according to claim 1, characterized in that: The outer surface of the button (19) is machined with a button ball groove (22) along the circumferential direction, and the outer surface of the screw sleeve (18) is machined with at least three ball limiting holes (25) evenly distributed along the circumferential direction.

4. The telescopic support leg for a pipe clamp according to claim 3, characterized in that: The ball limiting hole (25) is provided with limiting balls (24).

5. A telescopic support leg for a pipe clamp according to claim 1, characterized in that: The inner surface of the upper clutch (17) is machined with upper clutch ball grooves (17-1) along the circumferential direction.

6. The telescopic support leg for a pipe clamp according to claim 1, characterized in that: The button (19) and the lead screw (8) are slidably connected via a button linear bearing (20).

7. A telescopic support leg for a pipe clamp according to claim 1, characterized in that: The inner nut sleeve (4), outer nut sleeve (5), main spring (6), lead screw (8), lead screw nut (9), clutch spring (12), lower clutch (13), lead screw sleeve (18), button (19), button spring (21) and support leg housing (23) are coaxially arranged.

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