A pipe grooving clamp device

Abstract

The application discloses a pipeline groove pressing and clamping device, which comprises a groove pressing machine, the groove pressing machine comprises a lower pressing wheel and an upper pressing wheel, the groove pressing machine is slidably connected with a positioning plate, the groove pressing machine is fixedly provided with a driving assembly one, the positioning plate is fixedly provided with a push plate, the push plate is rotatably connected with an abutting ring, and a positioning assembly is arranged, the push plate is provided with two sets of clamping assemblies, the clamping assembly comprises a connecting plate, a pressing rod, an arc-shaped block and a half-ring block, the connecting plate is fixedly connected with the push plate, the pressing rod is slidably connected with the connecting plate, the arc-shaped block is connected to one end of the pressing rod, the half-ring block is slidably connected with the arc-shaped block, the half-ring block is provided with an arc-shaped groove, the half-ring block is provided with a giving-way groove in communication with the arc-shaped groove, the giving-way groove is matched with the pressing rod, a plurality of rolling balls are rotatably connected to one side of the arc-shaped block, the half-ring block is rollingly connected with the rolling balls, and the push plate is provided with a driving assembly two for driving the pressing rods in the two sets of clamping assemblies to move synchronously. The application has the effect that the pipeline is not easily damaged when the pipeline is pressed.

Description

Technical Field

[0001] This invention relates to the technical field of pipeline manufacturing, and in particular to a pipeline clamping device for pressing grooves. Background Technology

[0002] Grooved connection is a common pipe connection method. When using a grooved connection, a groove needs to be pressed around the pipe opening using a grooving machine, and then sealing rings and clamps are fitted onto the ports of adjacent pipes for connection.

[0003] For related technology, please refer to Chinese Patent No. CN218283412U, which discloses a positioning device for pipe grooving, including a support assembly, including a support frame, a worktable, a support spring, a support member, a sliding member, and a support column. The worktable is fixed to the bottom of the support frame, the support spring is set on the top of the worktable, the support member is fixed to the end of the support spring, the sliding member is set on one side of the support member, and the support column is rotatably connected to the support frame.

[0004] Regarding the aforementioned technologies, during grooving, the positioning block contacts the pipe. When the pipe tends to deflect, the positioning block prevents the pipe from deflecting. However, the pressure applied to the pipe by the grooving machine is relatively large, resulting in a large force when the pipe tends to deflect. The contact position between the positioning block and the pipe is a line contact, and the pipe is subjected to a large pressure per unit area. Consequently, when the pipe is grooved, the positioning block is prone to leaving dents on the pipe, causing damage to the pipe. Summary of the Invention

[0005] To prevent damage during pipe grooving, this application provides a pipe grooving clamping device.

[0006] This application provides a pipe clamping device with the following technical solution:

[0007] A pipe grooving clamping device includes a grooving machine, a lower pressure roller rotatably connected to the grooving machine, and an upper pressure roller for grooving. A positioning plate is slidably connected to the grooving machine, and a driving assembly for driving the positioning plate to slide is fixedly mounted on the grooving machine. A push plate is fixedly connected to the positioning plate, and an abutment ring is rotatably connected to the side of the push plate near the grooving machine. The push plate has a positioning assembly for supporting the pipe and two sets of clamping assemblies symmetrically arranged vertically around the abutment ring. Each clamping assembly includes a connecting plate, a pressure rod, and an arc. The components include a shaped block and a semi-ring block. The connecting plate and the push plate are fixedly connected. The pressure rod is slidably connected to the connecting plate along the vertical direction. The arc-shaped block is connected to the end of the pressure rod away from the connecting plate. The semi-ring block has an arc-shaped groove that matches the arc-shaped block. The arc-shaped block is slidably connected in the arc-shaped groove. The semi-ring block has a clearance groove that matches the pressure rod. The arc-shaped block is rotatably connected with several balls. The semi-ring block and the balls are rotatably connected. When the two semi-ring blocks in the two sets of clamping assemblies abut, they form a ring shape. The push plate is equipped with a second driving assembly that drives the pressure rods in the two sets of clamping assemblies to move synchronously.

[0008] By adopting the above technical solution, the positioning component supports the pipeline, which then abuts against the contact ring. Drive component two moves two pressure rods closer together. Supported by the connecting block, the two pressure rods, through the arc-shaped block, move the two semi-ring blocks closer together, clamping the pipeline. Drive component one pushes the positioning plate towards the grooving machine, causing the pipeline to fit over the lower pressure roller. The upper pressure roller moves down to apply pressure to the pipeline, and during grooving, the lower pressure roller drives the pipeline to rotate. As the pipeline rotates, friction drives the two semi-ring blocks to rotate. The arc-shaped block abuts against the sidewall of the arc-shaped groove. Under the limiting effect of the arc-shaped block, the two semi-ring blocks move alternately between the two arc-shaped blocks during rotation. The ball bearings help reduce the friction between the semi-ring blocks and the arc-shaped block, thus reducing the resistance encountered when the pipeline drives the semi-ring blocks to rotate. The two semi-ring blocks cooperate to limit the pipeline, making the pipeline grooving process more stable. The large contact area between the semi-ring blocks and the pipeline results in lower pressure per unit area on the pipeline, making it less likely to leave indentations and reducing damage to the pipeline.

[0009] Optionally, both pressure rods are fixedly connected to right-angle plates. The push plate has a rectangular slot adapted to the right-angle plate. The right-angle plate passes through the corresponding rectangular slot and is slidably connected to the push plate. The second drive assembly includes a motor, a helical gear, a helical gear, a threaded rod, and a threaded rod. The motor is fixedly connected to the positioning plate. The helical gear is fixedly connected to the output end of the motor. The threaded rods have opposite helical directions and are connected end to end in the vertical direction. Both the threaded rod and the threaded rod are rotatably connected to the push plate. The threaded rod passes through the upper right-angle plate and is threadedly connected to it. The threaded rod passes through the lower right-angle plate and is threadedly connected to it. The helical gear is fixedly connected to the lower end of the threaded rod and meshes with the helical gear.

[0010] By adopting the above technical solution, motor one drives threaded rod one and threaded rod two to rotate through the meshing transmission of the first helical gear and the second helical gear. Under the limiting action of the two rectangular slots on the corresponding right-angle plates, threaded rod one and threaded rod two push the two right-angle plates to move synchronously when rotating, so that the two right-angle plates drive the corresponding pressure rods to move closer or further away from each other, thereby realizing the clamping and loosening of the pipe.

[0011] Optionally, the end of the pressure rod away from the connecting plate is rotatably connected to a connecting pipe, the connecting pipe has an internal thread, the arc-shaped block is fixedly connected to a threaded post adapted to the connecting pipe, the threaded post is threadedly connected inside the connecting pipe, the pressure rod is fixedly connected to a locking block, the threaded post has a locking groove adapted to the locking block, the locking block is located in the locking groove and fits against the inner wall of the locking groove.

[0012] By adopting the above technical solution, in the initial state, the threaded column is threadedly connected to the connecting pipe. At this time, the arc block and the pressure rod are connected together. Rotating the connecting pipe causes the threaded column to disengage from the positioning pipe, thereby enabling the replacement of different arc blocks and semi-ring blocks to facilitate clamping pipes of different diameters. The slot limits the clamping block, restricting the rotation of the threaded column, so that the semi-ring block remains coaxial with the pipe when clamping it, which helps to maintain a stable clamping effect.

[0013] Optionally, in the two sets of clamping assemblies, the semi-ring block in the clamping assembly located at the lower end is designated as the lower semi-ring block, and counterweight blocks are fixedly connected to both sides of the lower semi-ring block, with the counterweight blocks located in the middle of the lower semi-ring block.

[0014] By adopting the above technical solution, after the grooving is completed, the upper pressure roller moves upward, and the counterweight block drives the lower half ring to rotate downward under the action of gravity. At this time, the upper half ring block rotates upward under the push of the lower half ring block, which facilitates the separation of the corresponding half ring blocks by the two arc blocks. The counterweight block eliminates the need for manual adjustment of the position of the half ring block, thus improving the grooving efficiency.

[0015] Optionally, in the clamping assembly, the connecting plate, pressure rod, and semi-ring block at the upper end are respectively configured as an upper connecting plate, an upper pressure rod, and an upper semi-ring block. The upper connecting plate is fixedly connected to a telescopic rod, which includes a thick rod and a thin rod slidably connected to the thick rod. The thick rod is fixedly connected to the upper connecting plate, and a push ring is fixedly connected to the lower end of the thin rod. A limit ring is fixedly connected to the upper pressure rod, and the limit ring is located at the upper end of the push ring. The thin rod is sleeved inside the limit ring, and a spring is sleeved on the thin rod. The spring abuts against both the limit ring and the push ring. A trapezoidal block is fixedly connected to the lower end of the thin rod, and a positioning groove adapted to the trapezoidal block is opened on the upper semi-ring block. When the two clamping assemblies are working, the spring is in a compressed state, the telescopic rod is in its maximum stroke, and at this time the trapezoidal block is located outside the positioning groove.

[0016] By adopting the above technical solution, the thin rod can slide vertically under the limiting action of the upper connecting plate and the thick rod. Supported by the limiting rod, the spring pushes the thin rod downwards, ensuring it maintains its maximum stroke. When clamping the pipe, the trapezoidal block does not contact the upper half-ring block, allowing unrestricted rotation of the upper half-ring block. When the upper half-ring block is in equilibrium, the positioning groove aligns with the trapezoidal block. As the upper half-ring block moves upwards, the trapezoidal block directly engages with the positioning groove, pushing the thin rod to continue upwards. At this point, the trapezoidal block and the positioning groove work together to limit the movement of the upper half-ring block, ensuring its stability during vertical movement and reducing the probability of it falling off.

[0017] Optionally, the second positioning component includes a cylinder, a positioning tube, several rotating rings, a positioning ring, a pull rod, and multiple sets of rotating parts. The positioning tube is fixedly connected to the push plate, all rotating rings are rotatably connected to the positioning tube, and a fixed ring is provided between adjacent rotating rings. A retaining ring is provided at the end of the positioning tube away from the push plate, and the retaining ring abuts against the rotating ring away from the push plate. The pull rod passes through the positioning tube and the push plate in sequence and is slidably connected to both. The positioning ring is rotatably connected to the end of the pull rod away from the push plate. The rotating parts include a support plate, a top rod, and several rotating plates. All rotating plates are hinged to the support plate, and the other end of each rotating plate is hinged to the corresponding rotating ring. The top rod is hinged to the positioning ring. The rotating plate away from the push plate is set as the active plate, and the other end of the top rod is hinged to the active plate. Multiple sets of rotating parts are arranged circumferentially along the positioning tube. A bearing is provided between the rotating ring and the positioning tube, and a bearing is provided between the positioning ring and the pull rod. The cylinder is fixedly connected to the end of the push plate away from the positioning tube, and the output end of the cylinder is fixedly connected to the pull rod.

[0018] By adopting the above technical solution, the push plate provides support for the positioning tube, allowing the rotating ring to rotate around it. The retaining ring cooperates with the push plate to clamp and position the rotating ring. The pull rod provides support for the positioning ring, enabling it to rotate around the pull rod. With the support of all the rotating plates, the support plate can swing. The pipe is fitted onto the positioning assembly, the output end of cylinder one retracts, the pull rod drives the positioning ring closer to the positioning tube, the positioning ring drives the push rod to move, and the push rod's movement causes the active plate to swing. The active plate's swing causes the support plate to move closer to and contact the inner wall of the pipe. When the pipe rotates, the push rod, active plate, and all rotating plates drive the positioning ring and all rotating rings to rotate. Bearings two and one respectively help reduce friction between the positioning ring and the pull rod, and between the rotating ring and the positioning tube. Multiple sets of support plates provide support for the inner wall of the pipe, further improving the stability of the pipe during groove pressing.

[0019] Optionally, the retaining ring is provided with a plurality of countersunk bolts one along the circumference. Each countersunk bolt one passes through the retaining ring and is threadedly connected to the positioning pipe. The end of the pull rod away from the cylinder one is fixedly connected to a rotating shaft. The bearing two is sleeved with the rotating shaft. The end of the rotating shaft away from the pull rod is connected to a disc block. The disc block is provided with countersunk bolts two. The countersunk bolts two pass through the disc block and are threadedly connected to the rotating shaft.

[0020] By adopting the above technical solution, all countersunk bolts are removed, thereby releasing the clamping and positioning of the retaining ring, which facilitates the disassembly and replacement of all rotating rings and all bearings. The rotating shaft provides support for bearings. The disc block cooperates with the rotating shaft to clamp and position the positioning ring. By removing countersunk bolts, the clamping and positioning of the disc block is released, which facilitates the disassembly of the positioning ring and bearings, and thus facilitates the disassembly and replacement of the positioning assembly.

[0021] Optionally, the support plate has an arc-shaped plate at one end away from the positioning tube, and vertical grooves are opened at both ends of the support plate. The arc-shaped plate is fixedly connected to a rectangular block that matches the vertical groove. The rectangular block is inserted into the vertical groove, and each rectangular block is provided with a countersunk bolt. Each countersunk bolt passes through the corresponding rectangular block and is threadedly connected to the support plate.

[0022] By adopting the above technical solution, the arc-shaped plate fits snugly against the inner wall of the pipe, which helps reduce damage to the inner wall of the pipe during support and limiting. When the pipe rotates, it drives the arc-shaped plate to rotate as well. The vertical groove limits the rectangular block, which in turn causes the support plate to rotate when the arc-shaped plate rotates. All countersunk bolts can be removed, making it easy to disassemble the arc-shaped plate and replace it with arc-shaped plates of different curvatures, thus improving the applicability of the arc-shaped plate.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The positioning component supports the pipe, which abuts against the contact ring. Drive component two moves two pressure rods closer together. Supported by the connecting block, the two pressure rods, through the arc-shaped block, move the two semi-ring blocks closer together, clamping the pipe. Drive component one pushes the positioning plate towards the grooving machine, causing the pipe to fit over the lower pressure roller. The upper pressure roller moves down to apply pressure to the pipe, and during grooving, the lower pressure roller rotates the pipe. As the pipe rotates, friction causes the two semi-ring blocks to rotate. The arc-shaped block abuts against the sidewall of the arc-shaped groove. Under the limiting effect of the arc-shaped block, the two semi-ring blocks move alternately between the two arc-shaped blocks during rotation. The ball bearings help reduce the friction between the semi-ring blocks and the arc-shaped block, thus reducing the resistance encountered when the pipe rotates the semi-ring blocks. The two semi-ring blocks cooperate to limit the pipe's movement, making the grooving process more stable. The large contact area between the semi-ring blocks and the pipe results in lower pressure per unit area on the pipe, making it less likely to leave indentations and reducing damage to the pipe.

[0025] 2. Motor 1 drives threaded rod 1 and threaded rod 2 to rotate through the meshing transmission of the first helical gear and the second helical gear. Under the limiting action of the two rectangular slots on the corresponding right angle plates, threaded rod 1 and threaded rod 2 push the two right angle plates to move synchronously when rotating, so that the two right angle plates drive the corresponding pressure rods to move closer or further away from each other, thereby realizing the clamping and loosening of the pipe.

[0026] 3. In the initial state, the threaded column is threadedly connected inside the connecting pipe. At this time, the arc block and the pressure rod are connected together. Rotating the connecting pipe causes the threaded column to disengage from the positioning pipe, thereby allowing the replacement of different arc blocks and semi-ring blocks to facilitate clamping pipes of different diameters. The slot limits the clamping block, restricting the rotation of the threaded column, so that the semi-ring block remains coaxial with the pipe when clamping it, which helps to maintain a stable clamping effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a pipe clamping device.

[0028] Figure 2 This is a schematic diagram designed to highlight the location of the clamping components.

[0029] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0030] Figure 4 This diagram is intended to highlight the structure of the positioning component.

[0031] Figure 5 This is a schematic diagram designed to highlight the upper ring block structure.

[0032] Explanation of reference numerals in the attached drawings: 1. Grooving machine; 11. Upper pressure roller; 12. Lower pressure roller; 2. Positioning plate; 13. Drive assembly one; 21. Push plate; 211. Abutment ring; 3. Positioning assembly; 4. Clamping assembly; 41. Connecting plate; 42. Pressure rod; 43. Arc block; 44. Semi-ring block; 5. Drive assembly two; 45. Right angle plate; 51. Motor one; 52. Helical gear one; 53. Helical gear two; 54. Threaded rod one; 55. Threaded rod two; 421. Connecting pipe; 422. Clamping block; 431. Threaded column; 432. Clamping groove; 441. Lower semi-ring block; 442. Counterweight block; 411. Upper connecting plate; 423. Upper pressure rod; 443. Upper semi-ring block; 46. Telescopic Rod; 461, Thick rod; 462, Thin rod; 463, Push ring; 424, Limiting ring; 464, Spring; 465, Trapezoidal block; 444, Arc groove; 445, Positioning groove; 31, Cylinder 1; 32, Positioning ring; 33, Positioning tube; 34, Rotating ring; 35, Pull rod; 36, Rotating component; 331, Retaining ring; 332, Countersunk bolt 1; 351, Disc block; 352, Countersunk bolt 2; 353, Rotating shaft; 361, Support plate; 362, Top rod; 363, Rotating plate; 364, Active plate; 365, Bearing 1; 366, Bearing 2; 37, Arc plate; 367, Vertical groove; 371, Rectangular block; 372, Countersunk bolt 3; 10, Pipe. Detailed Implementation

[0033] The present application will be further described in detail below with reference to all the accompanying drawings.

[0034] This application discloses a pipe clamping device.

[0035] Reference Figure 1 A pipe 10 grooving clamping device includes a grooving machine 1. The grooving machine 1 includes a lower pressure roller 12 and an upper pressure roller 11. A rotary motor that drives the lower pressure roller 12 to rotate is installed inside the grooving machine 1. The lower pressure roller 12 has a grooving groove. The upper pressure roller 11 is directly opposite the grooving groove and is slidably connected to the grooving machine 1. A hydraulic cylinder that drives the upper pressure roller 11 to move is fixedly connected to the grooving machine 1.

[0036] Reference Figure 1 and Figure 2 The grooving machine 1 is slidably connected to a positioning plate 2. The grooving machine 1 is fixed to a support frame, which includes two parallel crossbeams. Two limiting blocks are fixed to the lower end of the positioning plate 2, and the crossbeams pass through and are slidably connected to the corresponding limiting blocks. Supported by the crossbeams, the positioning plate 2 moves closer to or further away from the grooving machine 1. The support frame is equipped with a drive assembly 13, which is a drive cylinder, to move the positioning plate 2. A push plate 21 is fixed to the side of the positioning plate 2 away from the support frame. The push plate 21 has an abutment ring 211, and an annular groove is formed at the end of the push plate 21 closest to the grooving machine 1. The abutment ring 211 is rotatably connected within the annular groove. A positioning assembly 3 is installed on the push plate 21, located at the center of the annular groove.

[0037] Reference Figure 2 and Figure 3 The positioning assembly 3 includes a cylinder 31, a positioning tube 33, several rotating rings 34, a positioning ring 32, a pull rod 35, and multiple sets of rotating parts 36. The positioning tube 33 is fixedly connected to the push plate 21 and is coaxial with the annular groove. The pull rod 35 passes through the positioning tube 33 and the push plate 21 in sequence and is slidably connected to both. The positioning tube 33 supports the pull rod 35, allowing the pull rod 35 to slide along its length. The cylinder 31 is fixedly connected to the push plate 21 away from the grooving machine 1 (see reference). Figure 1 One end of the cylinder 31 is fixedly connected to the pull rod 35. The operator moves the pull rod 35 by manipulating the output end of the cylinder 31.

[0038] Reference Figure 2 and Figure 3 All rotating rings 34 are rotatably connected to the positioning tubes 33. The rotating rings 34 are evenly distributed. The positioning tubes 33 are provided with multiple fixed rings that restrict the movement of the rotating rings 34. The side of the positioning tubes 33 away from the push plate 21 is provided with a retaining ring 331. The retaining rings 331 are provided with multiple countersunk bolts 332 along the circumference. The operator passes the countersunk bolts 332 through the retaining rings 331 and threadedly connects them to the positioning tubes 33, so that the retaining rings 331 fits against the positioning tubes 33. Thus, the axial movement of all rotating rings 34 is restricted by the cooperation of the retaining rings 331 and the fixed rings.

[0039] Reference Figure 2 and Figure 3 A rotating shaft 353 is fixedly connected to the end of the pull rod 35 away from the push plate 21. The positioning ring 32 is rotatably connected to the rotating shaft 353, which provides support for the rotation of the positioning ring 32. A disc block 351 is provided at the end of the rotating shaft 353 away from the pull rod 35. The disc block 351 is equipped with a countersunk bolt 352. The operator inserts the countersunk bolt 352 through the disc block 351 and threadedly connects it to the rotating shaft 353, so that the disc block 351 cooperates with the pull rod 35 and limits the positioning ring 32. The operator removes all the countersunk bolts 332 and 352 to disassemble the positioning assembly 3, which facilitates the inspection and replacement of the positioning assembly 3.

[0040] Reference Figure 2 and Figure 3 The rotating component 36 includes a support plate 361, a top rod 362, and several rotating plates 363 corresponding to the rotating ring 34. The top plate is hinged to the positioning ring 32, and the rotation of the positioning ring 32 causes the top plate to rotate. One end of each rotating plate 363 is hinged to the corresponding rotating ring 34, and the rotation of the rotating ring 34 causes the rotating plate 363 to rotate. The other end of each rotating plate 363 is hinged to the support plate 361, and the swinging of the rotating plate 363 causes the support plate 361 to swing.

[0041] Reference Figure 2 and Figure 3 A rotating plate 363, located away from the push plate 21, is designated as the active plate 364, with the top plate hinged to the active plate 364. Initially, the positioning ring 32 is positioned away from the positioning tube 33, and is driven by cylinder 31 to move the pull rod 35 away from the grooving machine 1 (see reference). Figure 1 The pull rod 35 moves in the direction of the positioning ring 32, which drives the top rod 362 to move, causing the top rod 362 to push the active plate 364 to swing. In turn, the active plate 364 drives the support plate 361 to move away from the positioning tube 33 and fit against the inner wall of the pipe 10.

[0042] Reference Figure 3 and Figure 4 The positioning tube 33 has four sets of rotating parts 36 arranged circumferentially. The operator puts the pipe 10 onto the positioning tube 33 so that one end of the pipe 10 abuts against the abutment ring 211. At this time, all rotating parts are located inside the pipe 10. The operator moves the lever 35, and the positioning ring 32 moves the four support plates 361 synchronously through the push of the four push rods 362 and the four active plates 364, so that the four support plates 361 abut against the inner wall of the pipe 10, thereby initially positioning the pipe 10.

[0043] Reference Figure 2 and Figure 3The push plate 21 is equipped with two sets of clamping assemblies 4, which are symmetrical about each other in the vertical direction with the circular part of the abutment ring 211 as the center. The clamping assembly 4 includes a connecting plate 41, a pressure rod 42, an arc-shaped block 43, and a semi-ring block 44. The connecting plate 41 is fixedly connected to the push plate 21 near the grooving machine 1 (see reference). Figure 1 At one end of the plate 41, a vertical hole is provided in the vertical direction, and the pressure rod 42 is slidably connected in the vertical hole.

[0044] Reference Figure 2 and Figure 3 The end of the pressure rod 42 furthest from the connecting plate 41 is rotatably connected to a connecting pipe 421. The connecting pipe 421 has a connecting hole, and the lower end of the connecting hole has an internal thread. The arc-shaped block 43 is fixed with a threaded post 431 that matches the internal thread of the connecting pipe 421. The operator fits the threaded post 431 into the connecting pipe 421 and rotates the connecting pipe 421, causing the threaded rod to move closer to the pressure rod 42. The threaded post 431 and the connecting pipe 421 are threaded together, so that when the pressure rod 42 moves, it drives the arc-shaped block 43 to move synchronously.

[0045] Reference Figure 2 and Figure 3 During the connection process, the arc-shaped block 43 is kept parallel to the positioning tube 33. The end of the pressure rod 42 with the connecting tube 421 is fixed with a locking block 422. The locking block 422 is rectangular. The threaded column 431 has a slot 432 that matches the locking block 422. When the locking block 422 is in the slot 432, the slot 432 and the locking block 422 cooperate to limit the threaded column 431, so that after the threaded column 431 and the connecting tube 421 are connected, the arc-shaped block 43 can remain parallel to the positioning tube 33.

[0046] Reference Figure 2 and Figure 5 The semi-ring block 44 has an arc-shaped groove 444 that matches the arc-shaped block 43. The arc-shaped block 43 is slidably connected in the arc-shaped groove 444 and fits against the side wall of the arc-shaped groove 444. The two semi-ring blocks 44 on the two clamping assemblies 4 (refer to...) Figure 1 After docking, they form a complete ring. Half-ring block 44 (refer to...) Figure 1 A relief groove adapted to the threaded rod is provided, and the relief groove communicates with the arc-shaped groove 444. This allows the semi-annular block 44 (refer to...) to... Figure 1 When rotating, it will not be jammed by the threaded column 431. The two semi-ring blocks 44 rotate alternately between the two arc blocks 43 under the drive of the pipe 10.

[0047] Reference Figure 1 and Figure 2 When the two semi-ring blocks 44 rotate, a portion of the arc-shaped block 43 is always in the arc-shaped groove 444 (refer to...). Figure 5Within the arc block 43, the semi-circular block 44 will not fall off the arc block 43. The arc block 43 is provided with multiple balls, which are evenly distributed on the side of the arc block 43 away from the pressure rod 42 and are rotatably connected to the arc block 43. The end of the ball away from the rectangular block 371 is rotatably connected to the semi-circular block, thereby reducing the friction between the semi-circular block 44 and the arc block 43 when rotating.

[0048] Reference Figure 2 and Figure 3 The end of the pressure rod 42 away from the arc plate 37 is fixedly connected to a right angle plate 45. The push plate 21 has a rectangular groove in the vertical direction. The right angle plate 45 is slidably connected in the rectangular groove and abuts against the inner wall of the rectangular groove. Under the limiting effect of the rectangular groove on the right angle plate 45, the right angle plate 45 can drive the pressure rod 42 to move in the vertical direction.

[0049] Reference Figure 1 and Figure 2 The grooving machine 1 is equipped with a second drive assembly 5, which includes a first motor 51, a first helical gear 52, a second helical gear 53, a first threaded rod 54, and a second threaded rod 55. The first motor 51 is fixedly connected to the positioning plate 2 and is located on the side of the push plate 21 away from the grooving machine 1. The first helical gear 52 is fixedly connected to the output shaft of the first motor 51. The operator drives the first helical gear 52 to rotate by manipulating the rotation of the output shaft of the first motor 51.

[0050] Reference Figure 1 and Figure 2 Threaded rod 54 and threaded rod 55 have opposite helical directions, and are fixedly connected at their ends and coaxial. Threaded rod 54 passes through and is threadedly connected to the upper right-angle plate 45, and threaded rod 55 passes through and is threadedly connected to the lower right-angle plate 45. When threaded rods 54 and 55 rotate, they can push the two right-angle plates 45 to move synchronously in opposite directions. The push plate 21 is fixed with a support block adapted to threaded rods 54 and 55, and both threaded rods 54 and 55 are rotatably connected to the support block.

[0051] Reference Figure 1 and Figure 2 Helical gear 2 53 is fixedly connected to the lower end of threaded rod 2 55, and helical gear 2 53 meshes with helical gear 1 52. When the operator operates motor 1 51 to drive helical gear 1 52 to rotate, the meshing action of helical gear 2 53 and helical gear 1 52 drives threaded rod 1 54 and threaded rod 2 55 to rotate, thereby causing the two right-angle plates 45 to drive the two pressure rods 42 to move closer to each other, and finally causing the two semi-ring blocks 44 to abut against each other. At this time, the ring formed by the two semi-ring blocks 44 clamps the pipe 10.

[0052] Reference Figure 1 and Figure 2The drive cylinder pushes the positioning plate 2 closer to the grooving machine 1, and makes the pipe 10 fit onto the lower pressure roller 12. The hydraulic press pushes the upper pressure roller 11 to apply pressure to the pipe 10, and the rotating motor drives the lower pressure roller 12 to rotate. When the lower pressure roller 12 rotates, it drives the pipe 10 to rotate. Under the action of friction, the pipe 10 has the tendency to drive the two semi-ring blocks 44 and the four support plates 361 to rotate.

[0053] Reference Figure 3 and Figure 4 The support plate 361, through the connection between the rotating plate 363 and the top plate, drives the rotating ring 34 and the positioning ring 32 to rotate. Bearing 365 is installed between the rotating ring 34 and the positioning tube 33. Bearing 365 and bearing 366 reduce the friction between the rotating ring 34 and the positioning tube 33. Bearing 366 is installed between the positioning ring 32 and the pull rod 35. Bearing 366 helps reduce the friction between the positioning ring 32 and the rotating shaft 353, thereby reducing the resistance encountered by the pipe 10 when it drives the support plate 361 to rotate.

[0054] Reference Figure 3 and Figure 4 When the pipe 10 tends to deviate during the grooving process, the two semi-ring blocks 44 (refer to 1) cooperate to limit the pipe 10, thereby restricting its deviation. Since both semi-ring blocks 44 are in close contact with the pipe 10, the contact area is large, resulting in lower pressure per unit area on the pipe 10. Consequently, the semi-ring blocks 44 are less likely to leave indentations on the pipe 10, reducing damage. Simultaneously, the four support plates 361 provide support to the inner wall of the pipe 10, reducing the probability of deformation due to excessive deviation force and further improving the stability of the pipe 10 during grooving.

[0055] Reference Figure 3 and Figure 4 Each support plate 361 is provided with an arc-shaped plate 37. Two vertical grooves 367 are opened on the side of the support plate 361 away from the positioning tube 33. The two vertical grooves 367 are located at both ends of the support plate 361. A rectangular block 371 adapted to the vertical groove 367 is fixed to the arc-shaped plate 37. The rectangular block 371 is inserted into the vertical groove 367 and abuts against the inner wall of the vertical groove 367. Each rectangular block 371 is provided with a countersunk bolt 372. The operator passes the countersunk bolt 372 through the corresponding rectangular block 371 and threaded it to the support plate 361, so that the rectangular block 371 fits into the vertical groove 367. At this time, the arc-shaped plate 37 and the support plate 361 are connected together.

[0056] Reference Figure 3 and Figure 4The arc plate 37 has an arc surface that fits against the inner wall of the pipe 10, which helps to reduce the damage to the inner wall of the pipe 10 caused by the support plate 361. The operator removes all the countersunk bolts 372 and replaces the arc plate 37 with a different curvature. The operator rotates the connecting pipe 421 to disengage the threaded post 431 from the connecting pipe 421 and replaces the arc block 43 and semi-ring block 44 with different diameters, so that the arc plate 37 and semi-ring block 44 can be used for pipes 10 with different diameters.

[0057] Reference Figure 1 and Figure 2 The lower half-ring block 44 is designated as the lower half-ring block 441. Counterweights 442 are fixed to both sides of the lower half-ring block 441 along its length, with the counterweights 442 positioned in the middle of the arc-shaped side of the lower half-ring block 441. After the groove is pressed, the upper pressure roller 11 is moved upwards. At this time, the pipe 10 is not under pressure, and the lower counterweight 442 is affected by gravity, causing the lower half-ring block 441 to rotate downwards. The rotation of the lower half-ring block 441 pushes the other half-ring block 44 to rotate upwards.

[0058] Reference Figure 2 and Figure 3 After reaching equilibrium, the lower half-ring block 441 returns to its initial state before clamping. At this time, the operator operates motor 51 to drive the two pressure rods 42 to separate through threaded rod 54 and threaded rod 55. The counterweight 442 eliminates the need for manual adjustment of the position of the half-ring block 44, improving the pressing efficiency. When the counterweight 442 is at its highest point and in equilibrium, the operator can push the counterweight 442 to make it rotate the lower half-ring block 441, making the operation relatively simple.

[0059] Reference Figure 2 and Figure 3 The connecting plate 41 located at the upper end is designated as the upper connecting plate 411, which is close to the positioning plate 2 (see reference). Figure 1 A telescopic rod 46 is fixed on one side of the plate. The telescopic rod 46 is set downward. The telescopic rod 46 includes a thick rod 461 and a thin rod 462. The thick rod 461 is fixedly connected to the upper connecting plate 411. The thick rod 461 has a telescopic hole. The thin rod 462 is slidably connected in the telescopic hole. Under the limiting action of the thick rod 461, the thin rod 462 can slide in the vertical direction.

[0060] Reference Figure 2 and Figure 3 The upper half-ring block 44 located at the upper end is designated as the upper half-ring block 443. The lower end of the thin rod 462 is fixed with a trapezoidal block 465. The upper half-ring block 443 has a positioning groove 445 that matches the trapezoidal block 465. In the initial state, the trapezoidal block 465 is engaged in the positioning groove 445, thereby limiting the upper half-ring block 443 so that it is not easy to fall off the upper arc block 43 when moving vertically.

[0061] Reference Figure 2 and Figure 3 The upper pressure rod 42 at the upper end is designated as the upper pressure rod 423. The upper pressure rod 423 is fixed with a limit ring 424. When the upper pressure rod 423 moves, it drives the limit ring 424 to move. The thin rod 462 is sleeved inside the limit ring 424 and is slidably connected to the limit ring 424. A push ring 463 is fixed to one end of the straight thin rod 462 near the positioning plate 2. The limit ring 424 is located at the upper end of the push ring 463, and the inner diameter of the limit ring 424 is smaller than that of the push ring 463. A spring 464 is provided between the limit ring 424 and the push ring 463. Both ends of the spring 464 abut against both the limit ring 424 and the push ring 463.

[0062] Reference Figure 2 and Figure 3 The operator manipulates the upper pressure rod 423 to move downwards, and the lower pressure rod 42 drives the limiting ring 424 to move closer to the push ring 463. In turn, the spring 464 pushes the push ring 463 downwards, causing the thin rod 462 to move downwards. When the upper half-ring block 443 is in contact with the pipe 10, the telescopic rod 46 is at its maximum stroke. At this time, the trapezoidal block 465 is outside the positioning groove 445, and the rotation of the upper half-ring block 443 is unrestricted.

[0063] Reference Figure 2 and Figure 3 After the pressing groove is completed, the operator manipulates the upper pressing rod 423 to move the upper half ring block 443 upward. When the spring 464 is in a compressed state, the distance between the trapezoidal block 465 and the upper half ring block 443 is the shortest, so that the trapezoidal block 465 can be directly inserted into the positioning groove 445, thus keeping the upper half ring block 443 stable during the upward movement and not easy to fall off.

[0064] The implementation principle of the pipe 10 grooving clamping device in this embodiment is as follows: The pipe 10 is fitted onto the positioning component 3. The cylinder 31 drives the pull rod 35 to move, so that the four support plates 361 provide initial support for the pipe 10. The motor 51 drives the two pressure rods 42 to move closer to each other through the threaded rods 54 and 55. The two pressure rods 42 drive the two semi-ring blocks 44 to move closer to each other, thereby clamping the pipe 10. Both semi-ring blocks 44 are in contact with the pipe 10. The drive cylinder pushes the positioning plate 2 to move towards the grooving machine 1. The pipe 10 is fitted onto the lower pressure roller 12. The hydraulic cylinder pushes the upper pressure roller 11 to move down to apply pressure to the pipe 10. The lower pressure roller 12 drives the pipe 10 to rotate, thereby performing grooving. When the pipe 10 rotates, it drives the two semi-ring blocks 44 to rotate. Under the limiting action of the arc groove 444 and the arc block 43, the two semi-ring blocks 44 rotate alternately between the two arc blocks 43. By using ball bearings to reduce the friction between the semi-ring block 44 and the arc-shaped block 43, the resistance encountered by the pipe 10 during rotation is reduced. The two semi-ring blocks 44 cooperate to limit the movement of the pipe 10, making the pipe 10 more stable during groove pressing. The large contact area between the semi-ring block 44 and the pipe 10 results in a smaller pressure per unit area on the pipe 10. Consequently, the semi-ring block 44 is less likely to leave indentations on the pipe 10 when clamping and positioning it, which helps to reduce damage to the pipe 10 during groove pressing.

[0065] 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 pipe grooving clamping device, comprising a grooving machine (1), wherein the grooving machine (1) is rotatably connected to a lower pressure roller (12) and is provided with an upper pressure roller (11) for grooving, characterized in that: The grooving machine (1) is slidably connected to a positioning plate (2). The grooving machine (1) is fixedly provided with a driving assembly (13) for driving the positioning plate (2) to slide. The positioning plate (2) is fixedly connected to a push plate (21). The push plate (21) is rotatably connected to an abutment ring (211) on the side near the grooving machine (1). The push plate (21) is provided with a positioning assembly (3) for supporting the pipe. The push plate (21) is provided with two sets of clamping assemblies (4). The two sets of clamping assemblies (4) are symmetrically arranged vertically with the abutment ring (211) as the center. The clamping assembly (4) includes a connecting plate (41), a pressure rod (42), an arc block (43), and a semi-ring block (44). The connecting plate (41) is fixedly connected to the push plate (21). The pressure rod (42) is fixedly connected vertically to the connecting plate (41). The two sets of clamping assemblies (4) are connected in a sliding connection. The arc-shaped block (43) is connected to the end of the pressure rod (42) away from the connecting plate (41). The semi-ring block (44) has an arc-shaped groove (444) that matches the arc-shaped block (43). The arc-shaped block (43) is slidably connected in the arc-shaped groove (444). The semi-ring block (44) has a relief groove that matches the pressure rod (42). The arc-shaped block (43) is rotatably connected with several balls. The semi-ring block (44) is rotatably connected with the balls. When the two semi-ring blocks (44) in the two sets of clamping assemblies (4) abut, they form a ring shape. The push plate (21) is provided with a second driving assembly (5) that drives the pressure rod (42) in the two sets of clamping assemblies (4) to move synchronously. The positioning assembly (3) includes a cylinder (31), a positioning tube (33), and several rotating rings ( 34), positioning ring (32), pull rod (35) and multiple sets of rotating parts (36), positioning tube (33) is fixedly connected to push plate (21), all rotating rings (34) are rotatably connected to positioning tube (33), and a fixed ring is provided between adjacent rotating rings (34). A retaining ring (331) is provided at the end of positioning tube (33) away from push plate (21). The retaining ring (331) abuts against the rotating ring (34) away from push plate (21). Pull rod (35) passes through positioning tube (33) and push plate (21) in sequence and is slidably connected to both. Positioning ring (32) is rotatably connected to the end of pull rod (35) away from push plate (21). Rotating parts (36) include support plate (361), top rod (362) and several rotating plates (363). All 363) are hinged to the support plate (361), and the other end of the rotating plate (363) is hinged to the corresponding rotating ring (34). The push rod (362) is hinged to the positioning ring (32). The rotating plate (363) away from the push plate (21) is set as the active plate (364). The other end of the push rod (362) is hinged to the active plate (364). Multiple sets of rotating parts (36) are arranged around the positioning tube (33). A bearing (365) is provided between the rotating ring (34) and the positioning tube (33). A bearing (366) is provided between the positioning ring (32) and the pull rod (35). A cylinder (31) is fixedly connected to the end of the push plate (21) away from the positioning tube (33). The output end of the cylinder (31) is fixedly connected to the pull rod (35).The retaining ring (331) is provided with several countersunk bolts (332) along its circumference. Each countersunk bolt (332) passes through the retaining ring (331) and is threadedly connected to the positioning tube (33). The end of the pull rod (35) away from the cylinder (31) is fixedly connected to a rotating shaft (353). The bearing (366) is sleeved with the rotating shaft (353). The end of the rotating shaft (353) away from the pull rod (35) is connected to a disc block (351). The disc block (351) is provided with countersunk bolts (352). The countersunk bolts (352) pass through the disc block (351) and are threadedly connected to the rotating shaft.

2. The pipe clamping device according to claim 1, characterized in that: Both pressure rods (42) are fixedly connected to right-angle plates (45). The push plate (21) has a rectangular slot adapted to the right-angle plate (45). The right-angle plate (45) passes through the corresponding rectangular slot and is slidably connected to the push plate (21). The second drive assembly (5) includes a motor (51), a helical gear (52), a helical gear (53), a threaded rod (54), and a threaded rod (55). The motor (51) is fixedly connected to the positioning plate (2), and the helical gear (52) is fixedly connected to the motor (51). At the output end, threaded rod one (54) and threaded rod two (55) have opposite spiral directions and are connected end to end in the vertical direction. Both threaded rod one (54) and threaded rod two (55) are rotatably connected to push plate (21). Threaded rod one (54) passes through the right angle plate (45) located above and is threadedly connected to it. Threaded rod two (55) passes through the right angle plate (45) located below and is threadedly connected to it. Helical gear two (53) is fixedly connected to the lower end of threaded rod two (55) and meshes with helical gear one (52).

3. The pipe clamping device according to claim 1, characterized in that: The end of the pressure rod (42) away from the connecting plate (41) is rotatably connected to the connecting pipe (421). The connecting pipe (421) has an internal thread. The arc-shaped block (43) is fixedly connected to a threaded post (431) that is compatible with the connecting pipe (421). The threaded post (431) is threaded into the connecting pipe (421). The pressure rod (42) is fixedly connected to a locking block (422). The threaded post (431) has a locking groove (432) that is compatible with the locking block (422). The locking block (422) is located in the locking groove (432) and fits against the inner wall of the locking groove (432).

4. The pipe clamping device according to claim 1, characterized in that: In the two sets of clamping assemblies (4), the half-ring block (44) in the clamping assembly (4) located at the lower end is set as the lower half-ring block (441). The two sides of the lower half-ring block (441) are fixedly connected with counterweight blocks (442), and the counterweight blocks (442) are located in the middle position of the lower half-ring block (441).

5. A pipe clamping device according to claim 3, characterized in that: In the clamping assembly (4), the connecting plate (41), pressure rod (42), and semi-ring block (44) located at the upper end are respectively set as upper connecting plate (411), upper pressure rod (423), and upper semi-ring block (443). The upper connecting plate (411) is fixedly connected to a telescopic rod (46). The telescopic rod (46) includes a thick rod (461) and a thin rod (462) slidably connected to the thick rod (461). The thick rod (461) is fixedly connected to the upper connecting plate (411). The lower end of the thin rod (462) is fixedly connected to a push ring (463). The upper pressure rod (423) is fixedly connected to a limit ring (424). 424) is located at the upper end of the push ring (463). The thin rod (462) is sleeved in the limiting ring (424). The thin rod (462) is sleeved with a spring (464). The spring (464) abuts against both the limiting ring (424) and the push ring (463). The lower end of the thin rod (462) is fixedly connected to a trapezoidal block (465). The upper half ring block (443) has a positioning groove (445) that matches the trapezoidal block (465). When the two sets of clamping assemblies (4) are working, the spring (464) is in a compressed state, and the telescopic rod (46) is in its maximum stroke. At this time, the trapezoidal block (465) is located outside the positioning groove (445).

6. The pipe clamping device according to claim 1, characterized in that: The support plate (361) has an arc-shaped plate (37) at one end away from the positioning tube (33). Vertical grooves (367) are provided at both ends of the support plate (361). A rectangular block (371) adapted to the vertical groove (367) is fixedly connected to the arc-shaped plate (37). The rectangular block (371) is inserted into the vertical groove (367). Each rectangular block (371) is provided with a countersunk bolt (372). Each countersunk bolt (372) passes through the corresponding rectangular block (371) and is threaded to the support plate (361).

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