Center frame type pipe concentric clamping synchronous driving system and operation method thereof

Abstract

The invention discloses a center frame type pipe concentric clamping synchronous driving system and an operation method thereof. The center frame type pipe concentric clamping synchronous driving system comprises a first positioning driving center frame and a second positioning driving center frame which are installed on an intelligent assembly welding steel structure base. The longitudinal moving trolley is in sliding connection with the intelligent assembly welding steel structure base through a linear guide rail; a hydraulic drive system; the positioning center frame is suitable for clamping the straight pipe and providing support; the servo driving system is connected with the driving wheel of the positioning center frame and drives the straight pipe and the pipe fitting to rotate synchronously through a first chain wheel and chain mechanism; the first positioning driving center frame and the second positioning driving center frame are connected through a second chain wheel and chain mechanism and can move in the opposite or opposite directions, and therefore it is guaranteed that straight pipes are kept horizontal in the assembling and welding process through the synergistic effect of the hydraulic driving system and the positioning center frames, and the end faces do not jump; and reliable guarantee is provided for high-quality spot-welding-free assembly and welding.

Description

Technical Field

[0001] The present invention relates to the field of pipeline processing equipment, and in particular to a center frame type pipe concentric clamping synchronous drive system and an operating method thereof. Background Art

[0002] In modern industrial production, the application of intelligent pipeline prefabrication production lines is becoming increasingly widespread, and the demand for intelligent pipeline assembly and welding equipment is also becoming increasingly urgent. These equipment must possess the following basic functions: first, it must accurately position and secure straight pipes, ensuring they remain level and have no end face runout; second, it must enable the straight pipes to rotate synchronously with the fittings, ensuring consistent and stable rotational speed.

[0003] Currently, the main methods for driving the straight pipe rotation include two supporting trolleys + one U-shaped chuck clamping drive and two supporting trolleys + one cross arm roller pressing drive. However, these existing technologies have many drawbacks:

[0004] The longitudinal dimension is too large: it is not suitable for shorter straight pipes (such as straight pipes with a length of less than 1000mm), which limits the scope of application of the equipment.

[0005] Position deviation problem: After the U-shaped chuck is clamped, the longitudinal position of the straight tube will have a certain deviation, affecting the assembly accuracy.

[0006] Difficulty in maintaining concentricity: It is difficult to maintain concentricity between the supporting trolley, U-shaped chuck or clamping drive mechanism and the straight tube, resulting in poor stability during rotation.

[0007] Height issue: The equipment is too high, which affects the lateral transportation of the supporting truss robot and increases the complexity and cost of the automated production line.

[0008] Difficulty in lifting: Straight pipes can only be lifted in or out from above or one side, which causes problems with reverse transportation. In addition, due to the excessive depth of the U-shaped chuck, the lifting operation is difficult.

[0009] These issues severely impact the efficiency and quality of intelligent pipe assembly and welding, limiting the further development of automated production lines. Therefore, developing a straight pipe support, clamping, and drive system that can meet the needs of intelligent pipe assembly and welding has important practical significance and economic value.

[0010] Therefore, those skilled in the art are committed to developing a more accurate and reliable center frame pipe concentric clamping synchronous drive system and an operating method thereof. Summary of the Invention

[0011] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is

[0012] To achieve the above object, the present invention provides a center frame type pipe concentric clamping synchronous drive system, comprising:

[0013] a first positioning drive center frame; and

[0014] The second positioning driving center frame;

[0015] The first positioning drive center frame and the second positioning drive center frame are installed on the intelligent welded steel structure base and respectively include:

[0016] A longitudinally movable trolley is mounted on the intelligent welded steel structure base and is slidably connected to the intelligent welded steel structure base via a linear guide rail, and is suitable for adjusting the relative positions of the first positioning drive center frame and the second positioning drive center frame;

[0017] A hydraulic drive system, installed on the longitudinal moving trolley, adapted to drive the first positioning drive center frame and the second positioning drive center frame to clamp or release the straight pipe;

[0018] A positioning center frame is mounted on the longitudinal moving trolley and is suitable for clamping the straight pipe and providing support;

[0019] A servo drive system is installed on the longitudinal moving trolley and connected to the driving wheel of the positioning center frame, driving the straight pipe and the pipe fitting to rotate synchronously through the first sprocket chain mechanism;

[0020] The first positioning drive center frame and the second positioning drive center frame are connected via a second sprocket chain mechanism and can move toward each other or opposite directions.

[0021] Furthermore, the longitudinal moving trolley is composed of a thick steel plate and a linear guide rail pair, and is installed on the linear guide rail of the intelligent welded steel structure base.

[0022] Furthermore, the hydraulic drive system includes an integrated hydraulic station, a hydraulic cylinder and a hydraulic oil pipe. The hydraulic cylinder is connected to the positioning center frame and can drive the center frame to clamp or loosen the straight pipe.

[0023] Furthermore, the positioning center frame has at least three rollers, two of which are driving wheels and one is a passive wheel. The driving wheel drives the straight tube to rotate through the servo drive system, and the passive wheel is suitable for supporting the straight tube.

[0024] Furthermore, the servo drive system is connected to the driving wheel of the positioning center frame through the first sprocket chain mechanism, and the first sprocket chain mechanism includes a first driving sprocket, a first driving sprocket, a first transition sprocket and a first clamping sprocket that are sequentially connected in transmission.

[0025] Furthermore, it also includes a center frame centering distance adjustment system, which is installed on the intelligent welded steel structure base and is connected to the first positioning drive center frame and the second positioning drive center frame through a double row of chains, and can drive and adjust the first positioning drive center frame and the second positioning drive center frame to move towards or away from each other.

[0026] Furthermore, the center frame centering distance adjustment system includes a servo motor, a reducer, a third driving sprocket, a double-row chain, a passive sprocket and a chain tensioning mechanism. The servo motor drives the first positioning drive center frame and the second positioning drive center frame to move toward or relative to each other through the double-row chain.

[0027] Furthermore, the intelligent welded steel structure base is a steel plate welded structure, and a linear guide rail and a drive rack are provided at the bottom, which can support or move and guide the first positioning drive center frame and the second positioning drive center frame.

[0028] Furthermore, anchor bolts are provided at the bottom of the intelligent welded steel structure base.

[0029] The present application also provides a method for operating the center frame type pipe concentric clamping synchronous drive system as described in any one of the above items, comprising the following steps:

[0030] S1: After receiving the instruction, the center frame centering distance adjustment system adjusts the first positioning drive center frame and the second positioning drive center frame to an appropriate distance through the double-row chain;

[0031] S2: the hydraulic drive system drives the first positioning drive center frame and the second positioning drive center frame to be in an expanded state;

[0032] S3: The truss manipulator hangs the straight pipe into the first positioning drive center frame and the second positioning drive center frame;

[0033] S4: The hydraulic drive system drives the first positioning drive center frame and the second positioning drive center frame to close, clamping the straight pipe and performing precise positioning;

[0034] S5: The servo drive system drives the straight pipe and the pipe fitting to rotate synchronously through the first sprocket chain mechanism to complete the pairing and welding;

[0035] S6: The hydraulic drive system drives the first positioning drive center frame and the second positioning drive center frame to expand;

[0036] S7: The truss manipulator lifts out the straight pipe.

[0037] The device provided by the present invention has the following technical effects:

[0038] The center frame type pipe concentric clamping synchronous drive system of the present application is provided with a first positioning drive center frame and a second positioning drive center frame installed on the intelligent assembly welded steel structure base. The first positioning drive center frame and the second positioning drive center frame respectively include a longitudinal moving trolley installed on the intelligent assembly welded steel structure base and a hydraulic drive system, a positioning center frame and a private service drive system arranged on the longitudinal moving trolley, wherein the longitudinal moving trolley is slidably connected to the intelligent assembly welded steel structure base through a linear guide rail, and is suitable for adjusting the relative positions of the first positioning drive center frame and the second positioning drive center frame, and the hydraulic drive system is suitable for driving the first positioning drive center frame and The second positioning drive center frame clamps or releases the straight pipe. The positioning center frame is suitable for clamping the straight pipe and providing support. The servo drive system is connected to the driving wheel of the positioning center frame, and drives the straight pipe and the pipe fitting to rotate synchronously through the first sprocket chain mechanism. The first positioning drive center frame and the second positioning drive center frame are connected by the second sprocket chain mechanism, and can move in opposite directions. Then, through the coordinated action of the hydraulic drive system and the positioning center frame, it is ensured that the straight pipe remains horizontal during the assembly and welding process, and there is no end face vibration. At the same time, the straight pipe can rotate intelligently and synchronously with the pipe fitting, and the speed is consistent and stable, providing reliable guarantee for high-quality spotless assembly and welding.

[0039] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of the center frame type pipe concentric clamping synchronous drive system provided in this application;

[0041] Figure 2 for Figure 1 Schematic diagram of part of the structure;

[0042] Figure 3 for Figure 1 A partial structural diagram of another embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0044] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0045] While some exemplary embodiments of the present invention have been described for purposes of illustration, it should be understood that the present invention may be implemented in other ways not specifically shown in the drawings.

[0046] like Figures 1 to 2 The present invention provides a center frame type pipe concentric clamping synchronous drive system, including a first positioning drive center frame 2 and a second positioning drive center frame 3 installed on the same intelligent welded steel structure base 1, the two center frames respectively include a longitudinal moving trolley 4 installed on the intelligent welded steel structure base 1 and a hydraulic drive system 5, a liquid positioning center frame 6 and a servo drive system arranged on the longitudinal moving trolley 4, wherein the longitudinal moving trolley 4 is slidably connected to the intelligent welded steel structure base 1 through a linear guide rail 8, and is suitable for adjusting the relative positions of the first positioning drive center frame 2 and the second positioning drive center frame 3, the hydraulic drive system 5 is suitable for driving the first positioning drive center frame 2 and the second positioning drive center frame 3 to clamp or loosen the straight pipe, the liquid positioning center frame 6 is suitable for clamping the straight pipe and providing support, the servo drive system 7 is connected to the active wheel of the liquid positioning center frame 6, and drives the straight pipe and the pipe fitting to rotate synchronously through the first sprocket chain mechanism 9.

[0047] The first and second positioning drive center frames 2 and 3 are connected by a second sprocket chain mechanism, allowing them to move in opposite or opposite directions. The synergistic action of the hydraulic drive system 5 and the hydraulic positioning center frame 6 ensures that the straight pipes remain level during assembly and welding, with no end face jitter. The straight pipes also intelligently rotate synchronously with the pipe fittings, achieving consistent and stable speeds, ensuring high-quality, spot-free assembly and welding. Anchor bolts are also provided at the bottom of the intelligent welded steel structure base 1 for securing it to the ground, preventing displacement during operation.

[0048] Specifically, the longitudinally movable trolley 4 is composed of thick steel plates and eight linear guide rails. It is mounted and slidably fitted onto the linear guide rails 8 of the intelligent welded steel structure base 1. The thick steel frame provides high load-bearing capacity, while the eight linear guide rails ensure low friction and high-precision guidance during movement, accommodating rapid centering adjustments for straight pipes of varying lengths. A mounting surface is reserved on the top of the trolley for securing the hydraulic drive system 5, the hydraulic centering frame 6, and the servo drive system 7.

[0049] The hydraulic drive system 5 comprises an integrated hydraulic station 11, a hydraulic cylinder 12, and hydraulic fluid lines. The hydraulic station incorporates a variable displacement pump and proportional valve, enabling adjustable output pressure. The piston rod end of the hydraulic cylinder 12 is connected to the roller bracket 15 of the hydraulic center frame 6 via an articulated mechanism, driving the roller assembly 16 for radial opening and closing. The hydraulic fluid lines utilize a multi-layer braided steel wire reinforced structure, with leak-proof seals installed at the joints. The compact layout of the integrated hydraulic station 11 minimizes energy loss within the pipeline, and the proportional valve control enables stepless adjustment of the clamping force, ensuring surface-free clamping of straight pipes and preventing loosening.

[0050] In this embodiment, the hydraulic positioning center frame 6 comprises two active rollers 19 and one passive roller 20, evenly distributed on the roller bracket 15. The active rollers 19 are made of surface-hardened alloy steel, coated with a polyurethane friction layer on their outer edges, and secured to the bracket via bearing blocks 22. The passive rollers 20 are freely rotating, and the roller bracket 15 is hingedly connected to the piston rod of the hydraulic cylinder 12, enabling synchronous radial opening and closing. This three-point roller arrangement creates a self-centering clamp. The polyurethane layer increases the friction coefficient and protects the straight pipe surface. The passive rollers are height-adjustable to accommodate various pipe diameters, ensuring that the pipe axis coincides with the center of rotation.

[0051] For better drive, the output shaft of the servo drive system 7 is connected to the first drive sprocket 25 via a first reducer 24. This, in turn, drives the first driving sprocket 27, the first transition sprocket 28, and the first pressure sprocket 29 via a double-row roller chain 26. The first driving sprocket 27 is coaxially fixed to the driving roller 19 of the hydraulic positioning center frame 6. The first pressure sprocket 29 is equipped with a spring tensioner to maintain constant chain tension, eliminating transmission errors caused by chain slack and ensuring strict synchronous rotation of the straight pipe and pipe fittings.

[0052] Of course, in other embodiments, the corresponding driving device can also be selected according to actual conditions, such as not using the first sprocket chain mechanism 9 and using a Figure 3 The full gear set drive mode shown avoids the instability of the chain connection. The full gear set meshing drive mode can be controlled and adjusted more accurately. As long as it can meet the actual needs, no specific limitation is made here.

[0053] Alternatively, the sprocket chain drive method can be replaced with a roller and synchronous belt drive (not shown), as long as it can meet actual needs, and no specific limitation is made here.

[0054] This embodiment also includes a center frame centering and spacing adjustment system 31 mounted on the intelligent welded steel structure base 1. This center frame centering and spacing adjustment system 31 is the second sprocket and chain mechanism described above. The center frame centering and spacing adjustment system 31 includes a servo motor 32, a second reducer 33, a third driving sprocket 34, a double-row chain 35, and a chain tensioning mechanism 36. The servo motor 32 drives the third driving sprocket 34 to rotate via the second reducer 33. The double-row chain 35 is respectively connected to the longitudinally movable carriages 4 of the first and second positioning and driving center frames 3. The double-row chain 35 bidirectionally and synchronously drives the first and second positioning and driving center frames 3 to move toward and away from each other. The chain tensioning mechanism 36, consisting of an idler wheel 37 and a screw adjustment device 38, can compensate for chain elongation in real time.

[0055] The present application also provides a method for operating the center frame type pipe concentric clamping synchronous drive system as described in any of the above embodiments, comprising the following steps:

[0056] S1: After receiving the instruction, the center frame centering distance adjustment system 31 adjusts the first positioning drive center frame 2 and the second positioning drive center frame 3 to a suitable distance through the double-row chain 35;

[0057] S2: The hydraulic drive system 5 drives the first positioning drive center frame 2 and the second positioning drive center frame 3 to be in an expanded state;

[0058] S3: The truss manipulator places the straight pipe into the first positioning drive center frame 2 and the second positioning drive center frame 3;

[0059] S4: The hydraulic drive system 5 drives the first positioning drive center frame 2 and the second positioning drive center frame 3 to close, clamping the straight pipe and performing precise positioning;

[0060] S5: The servo drive system 7 drives the straight pipe and the pipe fitting to rotate synchronously through the first sprocket chain mechanism 9 to complete the pairing and welding;

[0061] S6: The hydraulic drive system 5 drives the first positioning drive center frame 2 and the second positioning drive center frame 3 to expand;

[0062] S7: The truss manipulator lifts out the straight pipe.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A center frame type pipe concentric clamping synchronous drive system, characterized in that: include: The first positioning drive center frame; as well as The second positioning drive center frame; The first positioning drive center frame and the second positioning drive center frame are installed on the intelligent welded steel structure base and respectively include: A longitudinally movable trolley is mounted on the intelligent welded steel structure base and is slidably connected to the intelligent welded steel structure base via a linear guide rail, and is suitable for adjusting the relative positions of the first positioning drive center frame and the second positioning drive center frame; A hydraulic drive system, installed on the longitudinal moving trolley, adapted to drive the first positioning drive center frame and the second positioning drive center frame to clamp or release the straight pipe; A positioning center frame is mounted on the longitudinal moving trolley and is suitable for clamping the straight pipe and providing support; A servo drive system is installed on the longitudinal moving trolley and connected to the driving wheel of the positioning center frame, driving the straight pipe and the pipe fitting to rotate synchronously through the first sprocket chain mechanism; The first positioning drive center frame and the second positioning drive center frame are connected via a second sprocket chain mechanism and can move toward each other or opposite directions.

2. The center frame type pipe concentric clamping synchronous drive system according to claim 1, characterized in that: The longitudinal moving trolley is composed of a thick steel plate and a linear guide rail pair, and is installed on the linear guide rail of the intelligent welded steel structure base.

3. The center frame type pipe concentric clamping synchronous drive system according to claim 2, characterized in that: The hydraulic drive system includes an integrated hydraulic station, a hydraulic cylinder and a hydraulic oil pipe. The hydraulic cylinder is connected to the positioning center frame and can drive the center frame to clamp or loosen the straight pipe.

4. The center frame type pipe concentric clamping synchronous drive system according to claim 3, characterized in that: The positioning center frame has at least three rollers, two of which are driving wheels and one is a passive wheel. The driving wheel drives the straight tube to rotate through the servo drive system, and the passive wheel is suitable for supporting the straight tube.

5. The center frame type pipe concentric clamping synchronous drive system according to claim 4, characterized in that: The servo drive system is connected to the driving wheel of the positioning center frame through the first sprocket chain mechanism, and the first sprocket chain mechanism includes a first driving sprocket, a first driving sprocket, a first transition sprocket and a first pressing sprocket that are sequentially connected in transmission.

6. The center frame type pipe concentric clamping synchronous drive system according to claim 5, characterized in that: It also includes a center frame centering distance adjustment system, which is installed on the intelligent welded steel structure base and is connected to the first positioning drive center frame and the second positioning drive center frame through a double row of chains. It can drive and adjust the first positioning drive center frame and the second positioning drive center frame to move closer to or away from each other.

7. The center frame type pipe concentric clamping synchronous drive system according to claim 6, characterized in that: The center frame centering distance adjustment system includes a servo motor, a second reducer, a third driving sprocket, a double-row chain, a passive sprocket and a chain tensioning mechanism. The servo motor drives the first positioning drive center frame and the second positioning drive center frame to move toward or relative to each other through the double-row chain.

8. The center frame type pipe concentric clamping synchronous drive system according to claim 7, characterized in that: The intelligent welded steel structure base is a steel plate welded structure with a linear guide rail and a drive rack provided at the bottom, which can support or move and guide the first positioning drive center frame and the second positioning drive center frame.

9. The center frame type pipe concentric clamping synchronous drive system according to claim 8, characterized in that: Anchor bolts are also provided at the bottom of the intelligent welded steel structure base.

10. An operating method of a center frame type pipe concentric clamping synchronous drive system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: After receiving the instruction, the center frame centering distance adjustment system adjusts the first positioning drive center frame and the second positioning drive center frame to an appropriate distance through the double-row chain; S2: the hydraulic drive system drives the first positioning drive center frame and the second positioning drive center frame to be in an expanded state; S3: The truss manipulator hangs the straight pipe into the first positioning drive center frame and the second positioning drive center frame; S4: The hydraulic drive system drives the first positioning drive center frame and the second positioning drive center frame to close, clamping the straight pipe and performing precise positioning; S5: The servo drive system drives the straight pipe and the pipe fitting to rotate synchronously through the first sprocket chain mechanism to complete the pairing and welding; S6: The hydraulic drive system drives the first positioning drive center frame and the second positioning drive center frame to expand; S7: The truss manipulator lifts out the straight pipe.

Images