A hydraulic internal alignment device

Abstract

The present invention discloses a hydraulic internal aligner, which relates to the technical field of mountain pipeline construction equipment, including an aligning frame and a driving bracket, an aligning assembly is arranged on the aligning frame, a driving assembly is arranged on the driving bracket, an elastic connection assembly is arranged between the aligning frame and the driving bracket, the driving assembly includes a driving wheel that can be flipped and pressed against the inner wall of the pipeline and a first hydraulic motor whose output end is fixedly connected to the driving wheel; the elastic connection assembly includes a universal ball joint fixed between the aligning frame and the middle part of the driving bracket, a plurality of abutment rods are slidably arranged on the aligning frame, a sliding seat that is slidably matched with the driving bracket is hinged on the abutment rod, and a first elastic member is fixedly connected between the abutment rod and the aligning frame. The present invention provides a hydraulic internal aligner that can reliably adapt to various types of pipelines and realizes the split bending of the aligning frame and the driving bracket through the flippable universal ball joint and the elastically arranged abutment rod and the sliding seat, thereby improving the bending ability.

Description

Technical Field

[0001] The invention relates to the technical field of mountain pipeline construction equipment, in particular to a hydraulic internal joint device. Background Art

[0002] The welding of steel pipes is an important part of pipeline construction, which is directly related to the quality of the pipeline and the safety and economic benefits of operation after completion. The welding of steel pipes must be done with the help of a aligner to align and position the two welded pipes. With the increasing development of automated welding and efficient welding technology, the welding process has put forward higher requirements on the aligning quality of the pipe aligner. Not only must the roundness of the two pipe openings be consistent, they must be aligned accurately and evenly, but also the gap must be uniform.

[0003] The Chinese invention patent with the existing authorization announcement number CN204584638U discloses an internal joint device, in which a tensioning mechanism I of the internal joint device is arranged adjacent to the tensioning mechanism II and the tensioning mechanism III in the axial direction, and the tensioning mechanism II and the tensioning mechanism III are arranged corresponding to the same pipeline and are driven by the same hydraulic cylinder; the actuator III used to push the action of the tensioning mechanism III pressure head and the actuator II used to drive the action of the tensioning mechanism II pressure head are arranged side by side in the axial direction, and are an integrated structure or connected as a whole; the hydraulic cylinder used to drive the action of the tensioning mechanism II and the tensioning mechanism III has the same running direction as the hydraulic cylinder used to drive the action of the tensioning mechanism I and is an inner and outer hydraulic cylinder structure arranged in a sleeve.

[0004] When the above technical solution is adopted, the tensioning mechanism is used to tighten the pipe connection during use. However, in actual use, due to the gap between the support of the coupling device and the inner wall of the pipe for bending during mountain construction, it can only pass through 40D on-site cold-bent pipes. It does not have the ability to pass 5D or 6D hot-bent pipes, resulting in poor adaptability. In addition, during mountain operations, the walking wheels driven by the motor are prone to slipping, affecting the coupling accuracy of the coupling device. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic internal joint device, which uses an elastic connecting component to connect the joint frame and the driving bracket, so that the joint frame and the driving bracket can bend separately, effectively reducing the axial size of the joint device body when turning, thereby improving the turning ability of the joint device, and the first hydraulic motor and the driving wheel can effectively prevent the joint device from slipping in the pipeline, thereby improving the joint accuracy of the joint device.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A hydraulic internal aligner comprises an aligning frame and a driving bracket, wherein the aligning frame is provided with an aligning component, the driving bracket is provided with a driving component, and an elastic connecting component is provided between the aligning frame and the driving bracket;

[0008] The driving assembly comprises a driving wheel which can be turned over and pressed against the inner wall of the pipeline, and a first hydraulic motor whose output end is fixedly connected to the driving wheel;

[0009] The elastic connection assembly includes a universal ball joint fixed between the mating frame and the middle part of the driving bracket, a plurality of abutment rods are slidably arranged on the mating frame, a sliding seat that slides with the driving bracket is hinged on the abutment rod, and a first elastic member is fixedly connected between the abutment rod and the mating frame.

[0010] By adopting the above technical scheme, when the coupling device needs to make a turn, the driving bracket drives the coupling frame to move through the elastic connecting component. When the coupling frame makes a turn, it drives the universal ball joint to rotate, and at the same time, the abutment rod close to the inner circle part of the inflection point is retracted into the coupling frame, and drives its corresponding sliding seat to slide close to the universal ball joint; the abutment rod close to the outer circle part of the inflection point extends out of the coupling frame and drives its corresponding sliding seat to slide away from the universal ball joint; the coupling frame and the driving bracket make turns respectively; and the first hydraulic motor can realize seamless conversion between walking and braking, and the driving wheel tightly matched with the inner wall of the pipeline can generate sufficient friction to prevent the coupling device from sliding, thereby improving the coupling accuracy. In this way, the axial size of the coupling device body when making a turn is effectively reduced, thereby improving the turning ability of the coupling device and improving the coupling accuracy at the same time.

[0011] The present invention is further configured as follows: a plurality of guide grooves are formed on the driving bracket, each of the sliding seats is formed with a guide block that slides with the guide grooves, two screw holes are formed on the driving bracket in the middle of the guide grooves, and the sliding seat is provided with a locking bolt that is threadedly connected to the screw holes.

[0012] By adopting the above technical solution, the stability of the connection between the slide seat and the drive bracket is improved by utilizing the cooperation of the guide groove and the guide block. At the same time, through the cooperation of the screw hole and the locking bolt, the stability of the connection between the docking frame and the drive bracket can be ensured during the overall transportation and lifting of the docking device, thereby improving the reliability of the device.

[0013] The present invention is further configured as follows: the driving assembly includes a swing frame hingedly arranged on a driving bracket, a cylinder hingedly arranged on the driving bracket and hingedly matched with the swing frame, the driving wheel and the first hydraulic motor are both fixed to the end of the swing frame, a hydraulic oil tank connected to the first hydraulic motor is fixed on the driving bracket, and a plurality of balancing wheels are rotatably arranged on the driving bracket and the counterpart frame.

[0014] By adopting the above technical solution, when in use, the driving bracket and the docking frame are placed inside the pipeline, the balancing wheel abuts against the inner wall of the pipeline, and the cylinder drives the swing frame to swing outward, so that the driving wheel abuts against the inner wall of the pipeline and is tightened; and a first hydraulic motor with a brake is used for driving, and the cylinder is used to provide sufficient positive pressure for the swing frame and the driving wheel, thereby ensuring that the driving wheel will not slide relative to the inner wall of the pipeline, thereby improving the docking accuracy of the docking device.

[0015] The present invention is further configured as follows: two flip frames are hingedly arranged on the driving bracket, auxiliary wheels are rotatably arranged on the two flip frames, a second hydraulic motor with an output end coaxially connected to the auxiliary wheel is fixed on the flip frame, and a driving mechanism for driving each flip frame to flip synchronously is arranged on the driving bracket.

[0016] By adopting the above-mentioned technical solution, the turning frame and the driving mechanism are used in combination to provide a stable driving force and supporting force for the driving bracket. At the same time, the auxiliary wheel and the driving wheel cooperate to abut against the inner wall of the pipe, which can increase the friction force, so that the driving bracket can climb the slope in the vertically arranged pipe, thereby improving the applicability of the device.

[0017] The present invention is further configured as follows: the driving mechanism includes a first oil cylinder fixedly mounted on a driving bracket, a driving rod is fixedly mounted on an output end of the first oil cylinder, a synchronous disk is fixedly mounted on an end of the driving rod, and two first connecting rods are hingedly mounted on the synchronous disk and are respectively hingedly mounted on two flip frames.

[0018] By adopting the above technical solution, when it is necessary to climb a slope in a vertical pipeline, it is only necessary to extend the first oil cylinder to drive the drive rod and the synchronization disk to move, and further drive the two flip frames to flip out of the drive bracket through the two first connecting rods, and the auxiliary wheels abut against the inner wall of the pipeline. The first oil cylinder can increase the positive pressure between the auxiliary wheels and the drive wheels and the pipeline, thereby increasing the friction between the auxiliary wheels and the drive wheels and the inner wall of the pipeline, ensuring that it can climb upward in the vertically arranged pipeline.

[0019] The present invention is further configured as follows: a plurality of limit rods which are slidably matched with the driving bracket are fixed at intervals on the synchronous disk, and a plurality of limit seats which are plug-matched with the limit rods are fixed on the mating frame.

[0020] By adopting the above technical solution, when working, the extension of the first oil cylinder will drive the limit rod to extend from the inside of the driving bracket through the driving rod, and the limit rod extended from the inside of the driving bracket will be plugged into and matched with the limit seat fixed on the matching frame, thereby completing the fixation of the matching frame and the driving bracket. In this way, it can be ensured that the matching frame remains stable during the upward movement, further improving the matching accuracy.

[0021] The present invention is further configured as follows: the docking assembly includes two groups of tightening mechanisms, the tightening mechanisms include a plurality of sliding rods slidably arranged on the docking frame, the ends of the sliding rods are fixed with abutment seats, two second oil cylinders are fixed on the docking frame, and the protruding ends of the two second oil cylinders are hinged with a plurality of second connecting rods hinged to one end of the sliding rod extending into the interior of the docking frame.

[0022] By adopting the above technical solution, when the docking assembly on the docking frame enters the opening of the pipe, the second oil cylinder close to the driving bracket side drives the sliding rod to extend through the second connecting rod, and the abutment seat abuts against the inner wall of the pipe to play a fixing role; then the other pipe is sleeved on the docking frame, and the second oil cylinder away from the driving bracket side drives its corresponding sliding rod to extend through the second connecting rod, and the abutment seat abuts against the inner wall of the pipe to complete the docking operation of the two pipes.

[0023] The present invention is further configured as follows: a mounting seat is fixed on the abutment seat away from the side of the driving bracket, a rotating shaft is rotatably connected to the mounting seat, an arc-shaped pad is arranged on the rotating shaft, the end faces of two adjacent arc-shaped pads are inclined surfaces abutting against each other, a top rod is slidably arranged on the mounting seat for pressing against the arc-shaped pad, and a second elastic member is arranged between the top rod and the mounting seat.

[0024] By adopting the above technical solution, the abutment seat away from the side of the driving bracket is used to drive the arc-shaped gasket to rise and fall, so as to abut against the joint of the inner wall of the pipe, thereby improving the accuracy of the port; in actual use, when the arc-shaped gasket is moved down, the outer diameter of the circular ring formed by each arc-shaped gasket is reduced, so each arc-shaped gasket will drive the rotating shaft to rotate under the action of the inclined surface, and the second elastic member is compressed at this time. When the arc-shaped gasket rises, the outer diameter of the circular ring formed by each arc-shaped gasket increases, so that each arc-shaped gasket rotates in opposite directions under the left and right of the second elastic member, ensuring that each arc-shaped gasket always forms a complete circular ring state, ensuring stable support for the gap on the inner wall of the pipe.

[0025] The present invention is further configured as follows: an adjusting bolt is threadedly connected to the mounting seat, and two ends of the second elastic member are respectively in contact with the push rod and the adjusting bolt.

[0026] By adopting the above technical solution, the initial position of the second elastic member is adjusted by using the adjusting bolt, thereby adjusting the initial position of each arc-shaped gasket, and ensuring that the push rod has a stable pre-tightening force on the arc-shaped gasket when tightening pipes of different diameters.

[0027] The present invention is further configured as follows: two limit strips are formed on the arc-shaped pad, a base support is fixedly arranged on the rotating shaft, a plurality of guide plates that are clipped and matched with the limit strips are fixedly arranged on the base support, a plurality of support rods that are movably matched with the base support are fixed on the arc-shaped pad, a plurality of third elastic parts are fixedly connected between the base support and the arc-shaped pad, and the end of the top rod abuts against one of the side walls of the guide plate.

[0028] By adopting the above technical solution, when in use, the position of the arc liner is limited by the guide plate and the limit strip, and the third elastic member is used to provide a pre-tightening force for the arc liner, thereby effectively protecting the arc liner to adapt to the unevenness of the inner wall of the pipe, thereby improving the reliability of the use of the device.

[0029] In summary, the beneficial technical effects of the present invention are:

[0030] (1) The docking frame and the driving bracket are connected by an elastic connecting assembly, so that the docking frame and the driving bracket can bend separately, effectively reducing the axial dimension of the docking device body when turning, thereby improving the turning ability of the docking device, and the first hydraulic motor and the driving wheel can prevent the docking device from sliding at a landslide location, thereby improving the docking accuracy;

[0031] (2) The elastic connection assembly is locked by using a sliding seat that can be slidably arranged and locked, thereby ensuring the stability of the connection between the docking frame and the driving bracket, and facilitating the transportation of the docking device;

[0032] (3) The reversible auxiliary wheels and the retractable limit rod are used to enable the alignment device to move in the vertically arranged pipeline, thereby increasing the applicable range of the alignment device and ensuring the alignment accuracy;

[0033] (4) The detachable arc-shaped gasket can be used to modify the mouthpiece to improve the mouthpiece's accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is an axonometric schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0035] Figure 2 is an axonometric schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0036] Figure 3 It is a schematic diagram of the centerline cross-section of the docking frame part of Example 1 of the present invention, which reflects the positional connection relationship of the components inside the docking frame;

[0037] Figure 4 It is an axonometric schematic diagram of the driving frame of Embodiment 2 of the present invention after removing part of the balancing wheel, reflecting the structure of the driving mechanism;

[0038] Figure 5 It is an axonometric schematic diagram of the docking frame portion of Example 3 of the present invention, reflecting the installation structure of each arc-shaped gasket;

[0039] Figure 6 It is an axonometric schematic diagram of the mounting seat portion of Embodiment 3 of the present invention, reflecting the positional connection relationship between each arc-shaped gasket and the tightening seat;

[0040] Figure 7It is an axonometric schematic diagram of the mounting seat portion of Example 3 of the present invention, reflecting the positional connection relationship between each arc-shaped pad and the ejector rod.

[0041] Figure numerals: 1, docking frame; 2, driving bracket; 3, universal ball joint; 4, abutment rod; 5, first elastic member; 6, slide seat; 7, guide groove; 8, guide block; 9, screw hole; 10, locking bolt; 11, slide rod; 12, abutment seat; 13, roller; 14, second oil cylinder; 15, second connecting rod; 16, front cage; 17, rear cage; 18, electric control box; 19, swing frame; 20, cylinder; 21, driving wheel; 22, first hydraulic motor; 23, hydraulic oil tank; 24, rear Guide protection frame; 25, balance wheel; 26, flip frame; 27, auxiliary wheel; 28, second hydraulic motor; 29, first oil cylinder; 30, drive rod; 31, synchronous disk; 32, first connecting rod; 33, limit rod; 34, limit seat; 35, mounting seat; 36, rotating shaft; 37, bottom support; 38, support rod; 39, arc-shaped pad; 40, inclined plane; 41, third elastic member; 42, limit strip; 43, guide plate; 44, push rod; 45, adjustment bolt; 46, second elastic member. DETAILED DESCRIPTION

[0042] The present invention will be described clearly and completely below with reference to the embodiments. Example

[0043] See attached Figure 1 A hydraulic internal aligner includes an aligning frame 1 and a driving bracket 2, wherein an elastic connection component is arranged between the aligning frame 1 and the driving bracket 2; wherein the aligning frame 1 may be a double truncated cone structure, on which the aligning component is arranged; and the driving bracket 2 may be a cylindrical frame structure, on which the driving component is arranged. The aligner and the driving bracket 2 are connected by the elastic connection component, so that the aligning frame 1 and the driving bracket 2 can bend separately, effectively reducing the axial dimension of the aligner body when it is bending, thereby improving the bending ability of the aligner.

[0044] See attached Figure 2 The elastic connection assembly includes a universal ball joint 3 fixed between the counterpart frame 1 and the middle part of the driving bracket 2. A plurality of abutment rods 4 are slidably arranged on the counterpart frame 1 along its axial direction. Each abutment rod 4 is evenly spaced around the axial direction of the counterpart frame 1. A first elastic member 5 is fixedly connected between the abutment rod 4 and the counterpart frame 1. The first elastic member 5 can be made of a spring; a slide seat 6 that slides with the driving bracket 2 is hingedly arranged at one end of the abutment rod 4 away from the counterpart frame 1. The driving bracket 2 is evenly formed with a plurality of guide grooves 7 around its axial direction. Each slide seat 6 is formed with a guide block 8 that slides with each guide groove 7. Screw holes 9 are formed on the driving bracket 2 in the middle of both sides of the guide groove 7 in the width direction. Two locking bolts 10 threadedly connected to the two screw holes 9 are inserted on the slide seat 6.

[0045] When the docking device needs to be transported, it is only necessary to lock the locking bolts 10 with the screw holes 9 to limit the slider and the abutment rod 4, so that the abutment rod 4 can further play a supporting role and achieve a stable connection between the docking frame 1 and the driving bracket 2, thereby facilitating the transportation and lifting of the docking device by the staff.

[0046] See attached Figure 3 The mating assembly includes two groups of tightening mechanisms spaced apart along the axial direction of the mating frame 1, the tightening mechanism includes a plurality of slide bars 11 slidably arranged along the radial direction of the mating frame 1, and each slide bar 11 is evenly spaced apart around the axial direction of the mating device; an abutment seat 12 is fixed to one end of each slide bar 11 extending out of the mating frame 1, and a roller 13 rotatably arranged on the abutment seat 12 and abutting against the inner wall of the pipe; second oil cylinders 14 are fixed to both end surfaces of the mating frame 1, and the protruding ends of the two second oil cylinders 14 extend into the interior of the mating frame 1 and are hingedly provided with a plurality of second connecting rods 15 hinged to one end of each slide bar 11 extending into the interior of the mating frame 1.

[0047] When the docking assembly on the docking frame 1 enters the opening of the pipe, the second oil cylinder 14 close to the driving bracket 2 drives the sliding rod 11 to extend through the second connecting rod 15, and the abutment seat 12 abuts against the inner wall of the pipe to play a fixing role; then the other pipe is sleeved on the docking frame 1, and the second oil cylinder 14 drives the sliding rod 11 away from the driving bracket 2 to extend through the second connecting rod 15, and the abutment seat 12 abuts against the inner wall of the pipe to complete the docking operation of the two pipes.

[0048] See attached Figure 1 A front cage 16 is fixedly connected to the side of the mating frame 1 away from the driving bracket 2. The front cage 16 may be a conical frame structure and is sleeved on the outside of the second oil cylinder 14. A rear cage 17 is fixed to the side of the mating frame 1 close to the driving bracket 2. An electric control box 18 is fixed to the rear cage 17. The electric control box 18 is electrically connected to the two second oil cylinders 14. The front cage 16 and the rear cage 17 can cooperate to protect the second oil cylinder 14, and the front cage 16 can also play a guiding role.

[0049] The driving assembly includes a swing frame 19 hingedly arranged on the driving bracket 2, and a cylinder 20 hingedly arranged on the driving bracket 2 and cooperating with the swing frame 19, and the cylinder 20 can be a nitrogen cylinder; a driving wheel 21 is rotatably arranged on the end of the swing frame 19 away from the driving bracket 2, and a first hydraulic motor 22 whose output end is fixed to the driving wheel 21 is fixed on the swing frame 19, and the first hydraulic motor 22 can be a hydraulic travel motor with built-in brakes; a hydraulic oil tank 23 connected to the first hydraulic motor 22 and the second oil cylinder 14 is fixed on the side of the driving bracket 2 away from the counterpart frame 1, and a rear guide protection frame 24 for protecting the hydraulic oil tank 23 is fixed on the driving bracket 2; a plurality of balancing wheels 25 are rotatably arranged on the outer side of the counterpart frame 1 and the driving bracket 2, and each balancing wheel 25 is evenly spaced around the axis direction of the driving bracket 2 and the counterpart frame 1.

[0050] The use of a travel motor with built-in brakes can effectively improve the stability of the movement of the driving bracket 2 and the docking frame 1, and during ramp transportation, it can achieve seamless switching between travel and braking, prevent the occurrence of landslides, and improve the positioning accuracy of the docking device; the cylinder 20 is used to drive the swing frame 19 to move, so that the driving wheel 21 abuts against the inner wall of the pipe and has a certain positive pressure.

[0051] The working principle of this embodiment is: before work, the coupling device is hoisted and placed into the pipeline, and after the driving bracket 2 enters the pipeline, the locking bolt 10 is removed, and then the coupling frame 1 is placed into the pipeline. At this time, the cylinder 20 extends to drive the swing frame 19 to flip out from the driving bracket 2, and the driving wheel 21 abuts against the inner wall of the pipeline, thereby realizing the driving of the coupling device.

[0052] When the coupling device needs to make a turn, the driving bracket 2 drives the coupling frame 1 to move through the elastic connecting component. When the coupling frame 1 makes a turn, it drives the universal ball joint 3 to rotate. At the same time, the abutment rod 4 close to the inner circle part of the inflection point is retracted into the coupling frame 1, and drives its corresponding slide 6 to slide close to the universal ball joint 3; the abutment rod 4 close to the outer circle part of the inflection point extends out of the coupling frame 1 and drives its corresponding slide 6 to slide away from the universal ball joint 3; the coupling frame 1 and the driving bracket 2 are made to make turns respectively. In this way, the axial dimension of the coupling device body when making a turn is effectively reduced, thereby improving the turning ability of the coupling device. Example

[0053] See attached Figure 4, a hydraulic internal alignment device, whose structure is basically the same as that of Example 1, except that: two flip frames 26 are hingedly arranged on the driving bracket 2, and auxiliary wheels 27 are rotatably arranged on the two flip frames 26. The two auxiliary wheels 27 and the driving wheel 21 are evenly spaced around the axial direction of the driving bracket 2, and a second hydraulic motor 28 is fixed on the flip frame 26 with an output end coaxially connected to the auxiliary wheel 27. The second hydraulic motor 28 is a hydraulic travel motor with self-brake, and the second hydraulic motor 28 is connected to the hydraulic oil tank 23. The driving bracket 2 is provided with a driving mechanism for driving each flip frame 26 to flip synchronously.

[0054] The driving mechanism includes a first oil cylinder 29 fixedly arranged in the middle of the driving bracket 2, the first oil cylinder 29 is connected to the hydraulic oil tank 23, a driving rod 30 is fixed to the output end of the first oil cylinder 29, a synchronous disk 31 is fixed to the end of the driving rod 30, two first connecting rods 32 respectively hinged to the two flip frames 26 are hingedly arranged on the synchronous disk 31, a plurality of limit rods 33 slidingly matched with the driving bracket 2 are fixed at intervals on the synchronous disk 31, each limit rod 33 is evenly spaced around the axis direction of the driving bracket 2 and is staggered with each abutment rod 4, the end of the limit rod 33 is a conical end, and a plurality of limit seats 34 plug-fitting with the limit rod 33 are fixed on the counterpart frame 1.

[0055] The first oil cylinder 29 can increase the positive pressure between the auxiliary wheel 27 and the driving wheel 21 and the pipeline, thereby increasing the friction between the auxiliary wheel 27 and the driving wheel 21 and the inner wall of the pipeline, ensuring that it can climb upward in the vertically arranged pipeline, and the auxiliary wheel 27 and the driving wheel 21 cooperate to increase the contact area between the driving assembly and the inner wall of the pipeline, effectively increasing the friction.

[0056] The working principle of this embodiment is: during operation, when it is necessary to climb in the vertical pipeline, the first oil cylinder 29 extends out to drive the driving rod 30 to move, and drives the two flip frames 26 to flip out from the driving bracket 2 through the first connecting rod 32, so as to stably support the driving bracket 2. At the same time, the driving rod 30 drives the limiting rod 33 to extend from the inside of the driving bracket 2 through the synchronization disk 31, and is inserted into the limiting seat 34, so as to ensure that the counterpart frame 1 can remain stable and ensure that the counterpart frame 1 can stably extend out of the pipeline opening, and the first hydraulic motor 22 and the second hydraulic motor 28 cooperate to increase the driving force of the driving bracket 2 and ensure that the driving bracket 2 can rise stably. Example

[0057] See attached Figure 5 and attached Figure 6A hydraulic internal alignment device, whose structure is basically the same as that of Example 1, except that: a mounting seat 35 is fixed on the abutment seat 12 on the side away from the driving bracket 2, and the mounting seat 35 is located between the abutment seats 12 on both sides. A rotating shaft 36 is rotatably connected to the middle of the mounting seat 35, and a bottom bracket 37 is fixed to the upper end of the rotating shaft 36. The bottom bracket 37 is an arc-shaped plate-like structure, and a support rod 38 is provided on the bottom bracket 37 to slide along the radial direction of the alignment frame 1. An arc-shaped pad 39 is fixed to the upper end of the support rod 38. The arc-shaped pad 39 can be a copper pad, and the end faces of two adjacent arc-shaped pads 39 are inclined surfaces 40 that abut against each other.

[0058] See attached Figure 7 A plurality of third elastic members 41 are fixedly connected between the arc-shaped gasket 39 and the bottom bracket 37. The third elastic members 41 may be made of springs. Limiting strips 42 are formed on both sides of the width direction of the arc-shaped gasket 39. Four guide plates 43 that are engaged with the limiting strips 42 are fixedly provided on the bottom bracket 37. A push rod 44 that abuts against one of the side walls is slidably provided on the mounting seat 35 along the axial direction of the mating frame 1. An adjusting bolt 45 is threadedly connected to the mounting seat 35. A second elastic member 46 that abuts against the push rod 44 and the adjusting bolt 45 respectively is provided in the mounting seat 35. The second elastic member 46 may be made of springs.

[0059] The initial position of the second elastic member 46 is adjusted by adjusting the bolt 45, thereby adjusting the initial position of each arc-shaped gasket 39, and when tightening pipes of different diameters, it is ensured that the push rod 44 has a stable pre-tightening force on the arc-shaped gasket 39; the position of the arc-shaped gasket 39 is limited by the cooperation of the guide plate 43 and the limit bar 42, and the arc-shaped gasket 39 is provided with a pre-tightening force by the third elastic member 41, thereby effectively protecting the arc-shaped gasket 39 to adapt to the unevenness of the inner wall of the pipe, thereby improving the reliability of the device.

[0060] The working principle of this embodiment is: the abutment seat 12 on the side away from the driving bracket 2 is used to drive the arc-shaped gasket 39 to rise and fall, so as to abut against the joint of the inner wall of the pipe to improve the accuracy of the port; in actual use, when the arc-shaped gasket 39 is moved down, the outer diameter of the circular ring formed by each arc-shaped gasket 39 is reduced, so each arc-shaped gasket 39 will drive the rotating shaft 36 to rotate under the action of the inclined surface 40, and the second elastic member 46 is compressed at this time; when the arc-shaped gasket 39 is raised, the outer diameter of the circular ring formed by each arc-shaped gasket 39 is increased, so that each arc-shaped gasket 39 rotates in the opposite direction under the left and right of the second elastic member 46, ensuring that each arc-shaped gasket 39 always forms a complete circular ring state, ensuring stable support for the gap on the inner wall of the pipe.

[0061] The above description is only a preferred specific implementation manner of the present invention, and is not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic internal aligner, characterized in that: It comprises a mating frame (1) and a driving bracket (2), wherein the mating frame (1) is provided with a mating component, the driving bracket (2) is provided with a driving component, and an elastic connection component is provided between the mating frame (1) and the driving bracket (2); The driving assembly comprises a driving wheel (21) that can be turned over and pressed against the inner wall of the pipeline, and a first hydraulic motor (22) whose output end is fixedly connected to the driving wheel (21); The elastic connection assembly comprises a universal ball joint (3) fixed between the mating frame (1) and the middle part of the driving bracket (2); a plurality of abutment rods (4) are slidably arranged on the mating frame (1); a slide seat (6) is hingedly connected to the abutment rod (4) and is slidably matched with the driving bracket (2); a first elastic member (5) is fixedly connected between the abutment rod (4) and the mating frame (1); The driving bracket (2) is formed with a plurality of guide grooves (7), each of the slide seats (6) is formed with a guide block (8) that slidably cooperates with the guide groove (7), two screw holes (9) are formed on the driving bracket (2) in the middle of the guide groove (7), and the slide seat (6) is provided with a locking bolt (10) that is threadedly connected to the screw hole (9); The driving assembly comprises a swing frame (19) hingedly arranged on a driving bracket (2); a cylinder (20) hingedly arranged on the driving bracket (2) and cooperating with the swing frame (19); the driving wheel (21) and the first hydraulic motor (22) are both fixed to the end of the swing frame (19); a hydraulic oil tank (23) connected to the first hydraulic motor (22) is fixed on the driving bracket (2); and a plurality of balancing wheels (25) are rotatably arranged on the driving bracket (2) and the counterpart frame (1); Two turning frames (26) are hingedly provided on the driving bracket (2), auxiliary wheels (27) are rotatably provided on the two turning frames (26), a second hydraulic motor (28) whose output end is coaxially fixedly connected to the auxiliary wheel (27) is fixed on the turning frame (26), and a driving mechanism for driving each turning frame (26) to turn synchronously is provided on the driving bracket (2); The mating assembly comprises two sets of tightening mechanisms, the tightening mechanisms comprising a plurality of slide bars (11) slidably arranged on the mating frame (1), an abutment seat (12) being fixed to the end of the slide bar (11), two second oil cylinders (14) being fixed to the mating frame (1), and a plurality of second connecting rods (15) being hinged to one end of the slide bar (11) extending into the interior of the mating frame (1) at the extended ends of the two second oil cylinders (14); A mounting seat (35) is fixed on the abutment seat (12) at a side away from the driving bracket (2), a rotating shaft (36) is rotatably connected to the mounting seat (35), an arc-shaped gasket (39) is arranged on the rotating shaft (36), end surfaces of two adjacent arc-shaped gaskets (39) are mutually abutting inclined surfaces (40), a push rod (44) for pressing against the arc-shaped gasket (39) is slidably arranged on the mounting seat (35), and a second elastic member (46) is arranged between the push rod (44) and the mounting seat (35); An adjusting bolt (45) is threadedly connected to the mounting seat (35), and two ends of the second elastic member (46) are respectively in contact with the push rod (44) and the adjusting bolt (45); Two limit strips (42) are formed on the arc-shaped pad (39), a bottom bracket (37) is fixedly arranged on the rotating shaft (36), a plurality of guide plates (43) that are snap-fitted with the limit strips (42) are fixedly arranged on the bottom bracket (37), a plurality of support rods (38) that are movably matched with the bottom bracket (37) are fixedly arranged on the arc-shaped pad (39), a plurality of third elastic members (41) are fixedly connected between the bottom bracket (37) and the arc-shaped pad (39), and an end of the push rod (44) abuts against a side wall of one of the guide plates (43).

2. A hydraulic internal aligner according to claim 1, characterized in that: The driving mechanism comprises a first oil cylinder (29) fixedly mounted on a driving bracket (2); a driving rod (30) is fixedly mounted on an output end of the first oil cylinder (29); a synchronizing disk (31) is fixedly mounted on an end of the driving rod (30); and two first connecting rods (32) are hingedly mounted on the synchronizing disk (31) and are respectively hingedly mounted on two tilting frames (26).

3. A hydraulic internal aligner according to claim 2, characterized in that: A plurality of limit rods (33) that are slidably matched with the driving bracket (2) are fixed at intervals on the synchronization disk (31), and a plurality of limit seats (34) that are plug-matched with the limit rods (33) are fixed on the mating frame (1).

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