Inner wall supporting device for multi-section bent thin-wall pipe fitting

Abstract

The invention provides an inner wall supporting device for a multi-section bent thin-wall pipe fitting, and belongs to the technical field of bent pipe production. The problem that when an existing bent pipe is clamped, the bent pipe is prone to deformation is solved. The inner wall supporting device for the multi-section bent thin-wall pipe fitting comprises a supporting module, a transmission module and a power module, the supporting module comprises an axial fixing piece, a diameter adjusting assembly and a supporting outer ring, and the axial fixing piece is provided with a first through hole; the diameter adjusting assembly comprises a rotating base, L-shaped connecting rods and a guide plate, a first sliding groove is formed in the axial fixing piece, a second through hole is formed in the guide plate, a rotating ball head is arranged at one end of each L-shaped connecting rod, a ball groove is formed in the rotating base, the supporting outer ring comprises a plurality of arc sections, and each arc section is connected with one L-shaped connecting rod. The clamping device has the advantages of preventing the thin-wall pipe from being damaged due to overlarge pressure at the clamping end and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bent pipe production, and particularly relates to an inner wall supporting device for a multi-segment bent thin-walled pipe. BACKGROUND

[0002] Before bending, the front section of the pipe is usually clamped by a clamping die to ensure the stability of the pipe during bending. The current clamping die is usually driven by a hydraulic cylinder, and a very large force is applied to the outer wall of the pipe to ensure the firmness.

[0003] With the increasing use of thin-walled bent pipes, if the bending of thin-walled pipes still continues to use a very large force to ensure the firmness of the pipe, it is very likely that the pipe will be crushed, causing damage to the product. Moreover, in the case of multiple bending of the same pipe, the inner wall of the clamping end needs to be supported to prevent damage to the pipe by the clamping die. SUMMARY

[0004] The present application aims to solve the above problems in the prior art and provides an inner wall supporting device for a multi-segment bent thin-walled pipe.

[0005] The purpose of the present application can be achieved by the following technical solution: an inner wall supporting device for a multi-segment bent thin-walled pipe, comprising a supporting module, a transmission module and a power module, the transmission module being used to connect the power module and the supporting module, the supporting module comprising an axial fixing member, a diameter adjusting assembly and a supporting outer ring, the axial fixing member being provided with a first through hole for the diameter adjusting assembly to pass through, the diameter adjusting assembly being used to adjust the diameter of the supporting outer ring, the diameter adjusting assembly comprising a rotating base, an L-shaped connecting rod and a guide plate, the axial fixing member being provided with a first sliding groove for the guide plate to slide, the guide plate being provided with a second through hole for the L-shaped connecting rod to pass through, the L-shaped connecting rod being provided at one end with a rotating ball head, the rotating base being provided with a ball groove for the rotating ball head to be installed, the supporting outer ring comprising a plurality of arc segments, each arc segment being connected to an L-shaped connecting rod, the power module being used to drive the rotating base to rotate through the transmission module, the L-shaped connecting rod being limited by the guide plate, the rotating angle of the rotating ball head being changed, thereby driving the arc segments to move outward.

[0006] The working principle of the present application is as follows: when it is necessary to support the thin-walled pipe, the supporting module is first placed in the position to be clamped, the power module does not need to enter the pipe wall through the transmission module, and the transmission module can adjust different angles; after the supporting module reaches the specified position, the power module works, the rotating base is driven to rotate through the transmission module, thereby driving the L-shaped connecting rod to rotate; since the L-shaped connecting rod passes through the guide plate at one end, the end of the L-shaped connecting rod away from the rotating ball head rotates at an angle; since the rotating ball head is close to the straight line at the minimum diameter of the corresponding arc segment, the other end is pushed to move outward, thereby driving the arc segment to move, so that the diameter of the supporting outer ring increases and abuts against the inner side wall of the elbow pipe, thereby playing a supporting role; after the pipe bending is completed, the power module works, the rotating base is reversely rotated, the arc segment returns to the initial position, that is, the diameter of the supporting outer appearance is minimum, the supporting module is taken out from the pipe, and the work is completed.

[0007] In the inner wall supporting device for multi-section bending thin-walled pipe fittings, one end of the arc segment is provided with a second sliding groove, the other end of the arc segment is provided with a mounting rack, the mounting rack is provided with a first roller, and the second sliding groove is used for moving the first roller of the other arc segment.

[0008] In the inner wall supporting device for multi-section bending thin-walled pipe fittings, the end of the arc segment close to the second sliding groove is further provided with a mounting baffle, the mounting baffle is communicated with the second sliding groove and the limiting groove, and the mounting baffle is used for preventing the first roller from moving outward.

[0009] In the inner wall supporting device for multi-section bending thin-walled pipe fittings, the middle part of the arc segment is provided with a connecting column, the connecting column is provided with a mounting hole for mounting the L-shaped connecting rod, the middle part of the mounting hole is provided with a positioning sliding rail, and the L-shaped connecting rod is provided with a positioning rod slidingly connected to the positioning sliding rail.

[0010] In the inner wall supporting device for multi-section bending thin-walled pipe fittings, the ball groove is provided with two ball joint cover plates, and the two ball joint cover plates are used for limiting the rotating ball head in the ball groove.

[0011] In the inner wall supporting device for multi-section bending thin-walled pipe fittings, the L-shaped connecting rod is provided with a rib plate.

[0012] In the inner wall supporting device for multi-section bending thin-walled pipe fittings, the rotating base is provided with an extension block for penetrating through the first through hole, the extension block is threadedly connected with the first through hole, and the extension block is used for connecting the transmission module.

[0013] In the inner wall supporting device for multi-section curved thin-walled pipe as described above, the transmission module comprises a motor shaft ball joint, a plurality of outer side ball socket pieces and a plurality of inner side ball joints, the motor shaft ball joint is used for the power module, the outer side ball socket piece is provided with a spherical groove for mounting the inner side ball joint and the motor shaft ball joint, the motor shaft ball joint and the inner side ball joint are both provided with a movable slot, a connecting cross rod is arranged in the movable slot, and a second roller is arranged at both ends of the connecting cross rod, and the spherical groove is provided with a limiting guide rail for sliding of the second roller.

[0014] In the inner wall supporting device for multi-section curved thin-walled pipe as described above, the power module comprises a motor, a motor mounting plate and a moving steel wire rope, the motor mounting plate is used for mounting the motor, and the moving steel wire rope is connected with the motor and used for being pulled by a person to drive the supporting module to move to a specified position.

[0015] Compared with the prior art, the inner wall supporting device for multi-section curved thin-walled pipe has the following beneficial effects: 1. The universal transmission joint capable of realizing rotation in three mutually perpendicular directions is adopted, and each direction can rotate by 120 degrees. Since the placement of the device is not easy to observe inside the pipe, the universal transmission joint is used, so that after passing through different bending angles and bending sections with different bending radii of the pipe with the same inner diameter, the torque required for work can still be transmitted through the transmission module, so that the inner wall of the pipe which needs to be bent multiple times can be supported, and the thin-walled pipe is prevented from being damaged due to excessive pressure of the clamping end.

[0016] 2. A plurality of supporting modules are additionally arranged to cope with clamping dies with different axial sizes, and the applicability of the device is improved. The universal joint chain is used to connect each group of supporting modules, so that each group of supporting modules can pass through the bending section of the pipe and simultaneously support the clamping end of the next pipe bending, and the supporting structures of all the supporting modules are uniformly distributed in the axial size of the clamping end.

[0017] 3. The clamping end of the pipe with an inner diameter in the range of 1:1.2 can be supported, so that the device has better practicability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the present application.

[0019] Figure 2 is a structural schematic diagram of the supporting module of the present application.

[0020] Figure 3 is a structural schematic diagram of the supporting module of the present application after being unfolded.

[0021] Figure 4 is a structural schematic diagram of the supporting module of the present application after being unfolded.

[0022] Figure 5 is a structural schematic diagram of the rotating base of the present application.

[0023] Figure 6 is a structural schematic diagram of the transmission module of the present application.

[0024] In the figure, 1, support module; 2, transmission module; 3, power module; 11, axial fixing part; 12, rotating base; 13, diameter adjusting assembly; 14, spherical joint cover plate; 15, support outer ring; 18, mounting baffle; 19, positioning rod; 112, guide plate; 113, first through hole; 115, first sliding groove; 116, second through hole; 117, spherical groove; 118, circular arc segment; 131, rotating ball head; 132, L-shaped connecting rod; 133, rib plate; 21, second sliding groove; 22, mounting frame; 23, first roller; 24, accommodation groove; 25, limiting groove; 26, connecting column; 261, mounting hole; 27, positioning sliding rail; 31, extension block; 41, spherical joint for motor shaft; 42, outer spherical socket part; 43, inner spherical joint; 44, spherical recess; 45, movable groove; 46, connecting cross rod; 47, second roller; 48, limiting guide rail; 51, motor; 52, motor mounting plate; 53, moving steel wire rope. DETAILED DESCRIPTION

[0025] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0026] As Figures 1-6 shown, the present inner wall support device for multi-section curved thin-walled pipe fittings comprises a support module 1, a transmission module 2 and a power module 3, the transmission module 2 is used to connect the power module 3 and the support module 1, the support module 1 comprises an axial fixing part 11, a diameter adjusting assembly 13 and a support outer ring 15, the axial fixing part 11 is provided with a first through hole 113, the first through hole 113 is used for the diameter adjusting assembly 13 to pass through, the diameter adjusting assembly 13 is used to adjust the diameter of the support outer ring 15, the diameter adjusting assembly 13 comprises a rotating base 12, an L-shaped connecting rod 132 and a guide plate 112, the axial fixing part 11 is provided with a first sliding groove 115 for the guide plate 112 to slide, the guide plate 112 is provided with a second through hole for the L-shaped connecting rod 132 to pass through, the L-shaped connecting rod 132 is provided with a rotating ball head 131 at one end, the rotating base 12 is provided with a spherical groove 117 for the rotating ball head 131 to be installed, the support outer ring 15 comprises a plurality of circular arc segments 118, each circular arc segment 118 is connected with one L-shaped connecting rod 132, the power module 3 is used to drive the rotating base 12 to rotate through the transmission module 2, the L-shaped connecting rod 132 rotates the angle of the rotating ball head 131 under the limiting of the guide plate 112, thereby driving the circular arc segment 118 to move outward.

[0027] Further, the one end of the circular arc segment 118 is provided with a second sliding groove 21, and the other end of the circular arc segment 118 is provided with a mounting rack 22, and the mounting rack 22 is provided with a first roller 23, the second sliding groove 21 is used for moving the first roller 23 of the other circular arc segment 118, the mounting rack 22 is provided with a gap slot 24 for mounting the first roller 23, and the second sliding groove 21 is provided with a limiting slot 25 for limiting the first roller 23, and the plurality of circular arc segments 118 are nested through the second sliding groove 21-first roller 23 to form a ring-shaped support body. When the diameter adjusting rod pushes the circular arc segment 118, the first roller 23 on the mounting rack 22 of the circular arc segment 118 rolls along the second sliding groove 21 of the adjacent circular arc segment 118, and drives the circular arc segment 118 to expand / contract synchronously in the radial direction. The limiting slot 25 limits the roller travel to prevent out-of-range movement, and at the same time, the second sliding groove 21 plus the first roller 23 forms a rolling friction pair, which reduces wear and tear, so that the structure has a plurality of circular arc segments 118 mechanical linkage, avoids local stress concentration, and protects the thin-walled pipe; the second sliding groove 21+roller structure forcibly synchronizes movement, ensures that the support outer ring 15 is always concentric, and has the advantages of avoiding inclination of the traditional split support.

[0028] Further, the one end of the circular arc segment 118 is provided with an installation baffle 18, the installation baffle 18 is connected with the second sliding groove 21 and the limiting slot 25, the installation baffle 18 is used for preventing the first roller 23 from moving outward, the installation baffle 18 seals the outlet of the second sliding groove 21, and the first roller 23 is locked in the closed loop track formed by the second sliding groove 21 and the limiting slot 25, and the setting is used to prevent the roller from falling out of the second sliding groove 21.

[0029] Further, the middle of the circular arc segment 118 is provided with a connecting column 26, the connecting column 26 is provided with a mounting hole 261 for mounting an L-shaped connecting rod 132, the middle of the mounting hole 261 is provided with a positioning sliding rail 27, the L-shaped connecting rod 132 is provided with a positioning rod 19 which is slidably connected to the positioning sliding rail 27, and the vertical end of the L-shaped connecting rod 132 is embedded in the positioning sliding rail 27 of the connecting column 26 through the positioning rod 19. When the rotating base 12 drives the horizontal end of the L-shaped rod to rotate, the positioning rod 19 slides along the positioning sliding rail 27 to convert the rotary motion into pure radial movement of the circular arc segment 118, and the design of the positioning sliding rail 27 eliminates the axial deviation in the radial movement, and the short force arm structure of the L-shaped connecting rod 132 reduces the transmission loss.

[0030] Further, the ball groove 117 is provided with two ball joint cover plates 14, which are used to limit the rotating ball head 131 in the ball groove 117. The two ball joint cover plates 14, in combination, form a spherical cavity with the ball groove 117 of the rotating base 12, which confines the rotating ball head 131. The rotating ball head 131 can freely deflect in the cavity, but the axial displacement is limited by the cover plates. The ball joint allows the L-shaped connecting rod to deflect at multiple angles, which is suitable for pipe bending. The cover plates share the clamping mold pressure and protect the ball head structure. The L-shaped connecting rod 132 is eccentrically arranged at the connection of the rotating ball head 131 to form a diameter adjusting rod with an eccentric ball head. See the accompanying drawings for details.

[0031] Further, the L-shaped connecting rod 132 is provided with a web plate 133, which is welded at the turning position of the L-shaped rod to increase the sectional moment of inertia. When the clamping mold is subjected to high pressure from the support outer ring 15, the web plate 133 resists bending deformation and maintains the thrust direction.

[0032] Further, the rotating base 12 is provided with an extension block 31 for passing through the first through hole 113. The extension block 31 is threadedly connected with the first through hole 113. The extension block 31 is used to connect the transmission module 2. The extension block 31 passes through the threaded hole of the axial fixing member 11, one end of which is connected with the transmission module 2, and the other end drives the diameter adjusting rod. When the thread is rotated, the self-locking feature (thread rise angle < friction angle) prevents reverse rotation, so that the support force remains even if the motor 51 is powered off during clamping.

[0033] Further, the transmission module 2 includes a motor 51 shaft ball joint 41, a plurality of outer side ball socket members 42, and a plurality of inner side ball joints 43. The motor 51 shaft ball joint 41 is used for the power module 3. The outer side ball socket members 42 are provided with a spherical recess 44 for installing the inner side ball joints 43 and the motor 51 shaft ball joint 41. The motor 51 shaft ball joint 41 and the inner side ball joint 43 are both provided with a movable slot 45, in which a connecting cross rod 46 is arranged. The two ends of the connecting cross rod 46 are provided with second rollers 47. The spherical recess 44 is provided with a limiting guide rail 48 for sliding the second rollers 47. The three-way 120° freedom allows the torque to be transmitted in a non-linear manner. The number of outer side ball socket members 42 and inner side ball joints 43 can be selected according to actual needs.

[0034] Further, the power module 3 includes a motor 51, a motor 51 mounting plate, and a moving steel wire rope 53. The motor 51 mounting plate is used for installing the motor 51. The moving steel wire rope 53 is connected with the motor 51. The moving steel wire rope 53 is used for manually pulling the support module 1 to the designated position. The manual pulling of the moving steel wire rope 53 drags the device to move in the pipe. The motor 51 mounting plate forms a sealed space with the protective shell, which blocks the metal debris during bending.

[0035] The specific embodiments described herein are merely illustrative of the principles of this application. Numerous modifications or adaptations will be readily apparent to those skilled in the art of the described embodiments without departing from the spirit of the application or scope of the appended claims.

[0036] Although a large number of terms are used herein, the possibility of using other terms is not excluded. The use of these terms is merely intended to facilitate the description and explanation of the essence of the present application; it is contrary to the spirit of the present application to interpret them as any kind of additional limitation.

Claims

1. An inner wall support device for multi-segment bent thin-walled pipe fittings, characterized in that, The system includes a support module (1), a transmission module (2), and a power module (3). The transmission module (2) connects the power module (3) and the support module (1). The support module (1) includes an axial fixing member (11), a diameter adjustment assembly (13), and a support outer ring (15). The axial fixing member (11) has a first through hole (113) for the diameter adjustment assembly (13) to pass through. The diameter adjustment assembly (13) is used to adjust the diameter of the support outer ring (15). The diameter adjustment assembly (13) includes a rotating base (12), an L-shaped connecting rod (132), and a guide plate (112). The axial fixing member (11) has a first groove for the guide plate (112) to slide. 115), the guide plate (112) is provided with a second through hole (116) for the L-shaped connecting rod (132) to pass through, one end of the L-shaped connecting rod (132) is provided with a rotating ball head (131), the rotating base (12) is provided with a ball groove (117) for the rotating ball head (131) to be installed, the supporting outer ring (15) includes multiple arc segments (118), each arc segment (118) is connected to one L-shaped connecting rod (132), the power module (3) is used to drive the rotating base (12) to rotate through the transmission module (2), the L-shaped connecting rod (132) rotates the ball head (131) by an angle under the limit of the guide plate (112), thereby driving the arc segment (118) to move outward.

2. The inner wall support device for multi-segment bent thin-walled pipes according to claim 1, characterized in that, One end of the arc segment (118) is provided with a second slide groove (21), and the other end of the arc segment (118) is provided with a mounting frame (22). The mounting frame (22) is provided with a first roller (23). The second slide groove (21) is used for the first roller (23) of other arc segments (118) to move. The mounting frame (22) is provided with a clearance groove (24) for the installation of the first roller (23). The second slide groove (21) is provided with a limiting groove (25) for limiting the first roller (23).

3. The inner wall support device for multi-segment bent thin-walled pipes according to claim 2, characterized in that, An installation baffle (18) is also provided at one end of the arc segment (118) near the second slide groove (21). The installation baffle (18) connects the second slide groove (21) and the limiting groove (25). The installation baffle (18) is used to prevent the first roller (23) from moving outward.

4. The inner wall support device for multi-segment bent thin-walled pipes according to claim 2, characterized in that, A connecting post (26) is provided in the middle of the arc segment (118). The connecting post (26) is provided with a mounting hole (261) for installing the L-shaped connecting rod (132). A positioning slide rail (27) is provided in the middle of the mounting hole (261). A positioning rod (19) is provided on the L-shaped connecting rod (132) and slidably connected to the positioning slide rail (27).

5. The inner wall support device for multi-segment bent thin-walled pipes according to claim 1, characterized in that, Two ball joint cover plates (14) are provided on the ball groove (117), and the two ball joint cover plates (14) are used to limit the rotating ball head (131) within the ball groove (117).

6. The inner wall support device for multi-segment bent thin-walled pipes according to claim 1, characterized in that, The L-shaped connecting rod (132) is provided with stiffening plates (133).

7. The inner wall support device for multi-segment bent thin-walled pipes according to claim 1, characterized in that, The rotating base (12) is provided with an extension block (31) for passing through the first through hole (113). The extension block (31) is threadedly connected to the first through hole (113) and is used to connect the transmission module (2).

8. The inner wall support device for multi-segment bent thin-walled pipes according to claim 1, characterized in that, The transmission module (2) includes a ball joint (41) for a motor (51) shaft, multiple outer ball joints (42) and multiple inner ball joints (43). The ball joint (41) for the motor (51) shaft is used for the power module (3). The outer ball joint (42) is provided with a spherical groove (44) for connecting the inner ball joint (43) and the ball joint (41) for the motor (51) shaft. Both the ball joint (41) for the motor (51) shaft and the inner ball joint (43) are provided with a movable groove (45). A connecting crossbar (46) is provided in the movable groove (45). Second rollers (47) are provided at both ends of the connecting crossbar (46). A limiting guide rail (48) for the second rollers (47) to slide is provided in the spherical groove (44).

9. The inner wall support device for multi-segment bent thin-walled pipes according to claim 1, characterized in that, The power module (3) includes a motor (51), a motor (51) mounting plate and a moving steel wire rope (53). The motor (51) mounting plate is used to power the motor (51) for installation. The moving steel wire rope (53) is connected to the motor (51) and is used by a person to pull the support module (1) to a designated position.

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