Pipeline prefabrication machining platform

Abstract

The invention discloses a pipeline prefabrication machining platform which comprises a table top and a plurality of pipeline positioning devices arranged on the table top, each pipeline positioning device comprises a fixed-axis deformation frame and a rotating mechanism, and each fixed-axis deformation frame comprises a first ring body and a second ring body which are coaxially arranged; a plurality of connecting rods are evenly distributed between the first ring body and the second ring body in the circumferential direction, the connecting rods are equal in length, the two ends of each connecting rod are connected with the first ring body and the second ring body through spherical hinges respectively, the first ring body is rotationally supported on the annular sliding rail, and the second ring body is rotationally supported on the annular sliding rail. The second ring body is arranged on the linear sliding rail in a sliding manner; and the rotating mechanism controls the first ring body to rotate relative to the second ring body. The pipeline positioning device based on the fixed-axis deformation frame is arranged on the pipeline prefabrication machining platform, and fixed-axis self-adaptive positioning of the pipeline in the clamping process is achieved through the first ring body and the second ring body which are coaxially arranged and the equal-length connecting rods evenly distributed in the circumferential direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline processing equipment, in particular to a pipeline prefabrication processing platform. BACKGROUND

[0002] The pipeline prefabrication processing platform is an important auxiliary operation equipment for cutting, beveling, assembling, welding or detecting pipelines, and the main function of the processing platform is to position the pipeline so as to facilitate the workers or robots to cut, bevel, assemble, weld or detect the pipeline. At present, the positioning of the pipeline mainly uses toggle clamps to position the pipeline. Such clamps use two clamping parts in relative motion to clamp the pipeline. The clamping stability is poor, the adaptability to different cross-section pipelines is poor, the stress position of clamping is concentrated, the thin-walled pipeline is easily damaged, and the toggle lever mechanism needs to be used, which is not only inconvenient to use, but also occupies a large space. In addition, during the welding operation of the pipeline, it is usually necessary to ensure that the two pipelines are coaxial or the axes are coplanar. The existing clamps are difficult to achieve, especially when the diameters of the two pipelines are different. SUMMARY

[0003] To solve at least one of the above technical problems, the present application provides a pipeline prefabrication processing platform, which is provided with a pipeline positioning device based on a fixed-axis deformation frame, which can always keep the axis position of the clamped pipeline unchanged, and is convenient for positioning pipelines of different sizes or cross-sectional shapes.

[0004] The technical solution adopted by the present application is to design a pipeline prefabrication processing platform, which comprises a table top and a plurality of pipeline positioning devices arranged on the table top. The pipeline positioning device comprises a fixed-axis deformation frame and a rotating mechanism. The fixed-axis deformation frame comprises a first ring body and a second ring body arranged coaxially. A plurality of connecting rods are uniformly distributed between the first ring body and the second ring body in the circumferential direction. The lengths of the connecting rods are equal. The two ends of each connecting rod are connected to the first ring body and the second ring body through ball hinges, respectively. The first ring body is rotatably supported on the annular slide rail, and the second ring body is slidably arranged on the linear slide rail. The rotating mechanism controls the relative rotation of the first ring body and the second ring body.

[0005] In some embodiments, the rotating mechanism comprises a cylinder, the second ring body is slidably sleeved in the cylinder, and the linear slide rail is arranged on the inner wall of the cylinder.

[0006] In some embodiments, the rotating mechanism comprises a return spring arranged between the linear slide rail and the second ring body. The return spring causes the second ring body to have a tendency to move towards the first ring body.

[0007] In some embodiments, the linear slide rail comprises a linear slide groove formed on the inner wall of the cylinder body and a sliding block fixed on the second ring body and slidingly matched with the linear slide groove.

[0008] In some embodiments, the linear slide groove comprises a through groove on the cylinder wall, and the sliding block is connected with an external handle through the through groove.

[0009] In some embodiments, the first ring body is coaxially connected with the cylinder body.

[0010] In some embodiments, the first ring body is coaxially provided with a driven gear, the cylinder body is provided with a motor, and the motor shaft is provided with a driving gear engaged with the driven gear.

[0011] In some embodiments, the tabletop is provided with a plurality of the pipe positioning devices.

[0012] In some embodiments, the ring body axes of the plurality of pipe positioning devices are collinear.

[0013] In some embodiments, the ring body axes of the plurality of pipe positioning devices are perpendicular in the same plane.

[0014] Compared with the prior art, the present application has the following beneficial effects: The present application realizes the coaxial positioning of the pipe during clamping by setting the pipe positioning device based on the fixed-axis deformation frame on the pipe prefabrication platform, using the coaxially arranged first ring body, the second ring body and the equidistant connecting rods arranged in the circumferential direction. The connecting rods are synchronously tilted and deformed under the relative rotation, so that the clamping space is uniformly contracted in the circumferential direction, ensuring that the pipe axis position is always unchanged, and significantly improving the coaxial positioning and assembly precision of the pipe. The structure clamps uniformly, can effectively avoid local extrusion damage of the thin-walled pipe, and has good adaptability to pipes with different diameters and different cross-sectional shapes. Through the cooperation of the cylinder body, the linear slide rail and the return spring, the rotation-axial movement relationship is stable and reliable, the overall structure is compact, the operation is convenient, and the occupied space is small. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be described in detail below with specific examples and drawings. In order to show details, facilitate understanding of its principles, it is not necessarily drawn to scale, and similar reference numerals can describe similar parts in different views. The drawings generally show the embodiments discussed herein in an exemplary and non-limiting manner. Among them: Figure 1 is a cross-sectional schematic view of the two ring bodies of example one when they are close.

[0016] Figure 2 is a cross-sectional schematic view of the two ring bodies of example one when they are far apart.

[0017] Figure 3 is the main schematic diagram of the fixed-axis deformation frame.

[0018] Figure 4 is the schematic diagram of the fixed-axis deformation frame of Figure 3 after the relative rotation of the two ring bodies by a small angle.

[0019] Figure 5 is the schematic diagram of the fixed-axis deformation frame of Figure 4 .

[0020] Figure 6 is the schematic diagram of the fixed-axis deformation frame of Figure 3 after the relative rotation of the two ring bodies by a large angle.

[0021] Figure 7 is the top view schematic diagram of Figure 6 .

[0022] Figure 8 is the schematic diagram of the fixed-axis deformation frame of Figure 6 .

[0023] Figure 9 is the schematic diagram of the machining platform for the connection of two coaxial pipes.

[0024] Figure 10 is the schematic diagram of the machining platform for the connection of two vertical pipes.

[0025] Figure 11 is the schematic diagram of the second embodiment.

[0026] In the figure, 1 is a first ring body; 2 is a second ring body; 3 is a table top; 4 is a connecting rod; 5 is a spherical hinge; 6 is a cylinder body; 7 is a straight-line sliding groove; 8 is a sliding block; 9 is a circular sliding groove; 10 is a radial protrusion; 11 is a reset spring; 12 is a check ring; 13 is a handle; 14 is a pipe; 15 is a driven gear; 16 is a driving gear; 17 is a motor; and 18 is a support seat. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present application, and the technical solutions of the present application are further described in conjunction with the accompanying drawings, but the present application is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily required by the solutions of the invention.

[0028] The principles and structures of the present application will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Embodiment One As Figures 1 to 8As shown, a pipeline prefabrication platform comprises a table top 3 and a pipeline positioning device arranged on the table top 3, the pipeline positioning device comprises a fixed-axis deformation frame and a rotating mechanism, the fixed-axis deformation frame comprises a first ring body 1 and a second ring body 2 arranged coaxially, a plurality of connecting rods 4 are uniformly distributed between the first ring body 1 and the second ring body 2 in the circumferential direction, the lengths of the connecting rods 4 are equal, the two ends of each connecting rod 4 are connected to the first ring body 1 and the second ring body 2 through ball hinges 5, the first ring body 1 is rotatably supported on the annular slide rail, and the second ring body 2 is slidably arranged on the linear slide rail; the rotating mechanism controls the relative rotation of the first ring body 1 and the second ring body 2. When all the connecting rods 4 are parallel, the distance between the first ring body 1 and the second ring body 2 is the largest, and the distance between the connecting rods 4 is also the largest, at this time, the connecting rods 4 are perpendicular to the end faces of the first ring body 1 and the second ring body 2, when the first ring body 1 rotates relative to the second ring body 2, the connecting rods 4 are twisted, that is, the connecting rods 4 are inclined relative to the end faces of the first ring body 1 and the second ring body 2, the distance between the first ring body 1 and the second ring body 2 becomes smaller, and the distance between the connecting rods 4 also becomes smaller, but no matter how the distance changes, the distance between the connecting rods 4 and the axes of the first ring body 1 and the second ring body 2 is always equal.

[0030] A positioning frame with variable space but constant axis is formed by the first ring body 1, the second ring body 2 and the equal-length connecting rods 4 uniformly distributed therebetween in the circumferential direction. The first ring body 1 is rotatably supported on the annular slide rail, the second ring body 2 axially slides along the linear slide rail, and the rotating mechanism drives the first ring body 1 to rotate relative to the second ring body 2 around the common axis. With the relative rotation of the first ring body 1, each connecting rod 4 is synchronously deformed and inclined under the constraint of the ball hinge 5, so that the axial distance between the first ring body 1 and the second ring body 2 gradually decreases, and the circumferential distance between the connecting rods 4 synchronously decreases, thereby forming a uniform clamping of the pipeline 14 located in the space surrounded by the connecting rods 4. Since the lengths of the connecting rods 4 are consistent and the two ends of each connecting rod 4 are symmetrically arranged around the same axis, the radial distance of the connecting rods 4 to the ring body axis is always equal during the entire deformation process, thereby ensuring that the axial position of the clamped pipeline 14 remains unchanged, and realizing the automatic coaxial positioning of the pipeline 14. This structure does not need the local clamping mode of the traditional toggle clamp, and the clamping stress is uniformly distributed in the circumferential direction, which can effectively avoid the local extrusion damage of the thin-walled pipeline 14, and the more the connecting rods 4 are, the more uniform the clamping force distribution is; at the same time, a plurality of connecting rods 4 are arranged in the circumferential direction, so that the fixed-axis deformation frame has good self-adaptability to pipelines 14 with different diameters and different cross-sectional shapes.

[0031] In the specific use process, the operator or the automatic control system first drives the first ring body 1 to rotate reversely relative to the second ring body 2 through the rotating mechanism, so that the fixed shaft deformation frame is in the open state, the size of the inner cavity surrounded by the connecting rods 4 is larger than the outer diameter of the pipeline 14 to be processed, thereby facilitating the pipeline 14 to be placed or moved along the axial direction quickly. When the pipeline 14 is in place, the rotating mechanism reverses the action, the first ring body 1 rotates relative to the second ring body 2 around the common axis, and each connecting rod 4 occurs coordinated spatial tilt deformation under the multi-degree-of-freedom constraint of the spherical hinge 5, the spacing between the connecting rods 4 is synchronously reduced and uniformly closes to the outer wall of the pipeline 14 along the circumferential direction, until the stable contact with the outer wall of the pipeline 14 is formed. Since the fixed shaft deformation frame always takes the common axis of the first ring body 1 and the second ring body 2 as the reference in the whole deformation process, the force of the connecting rods 4 on the pipeline 14 is evenly distributed in the ring direction, which avoids the deviation and deformation caused by unilateral or local clamping of the traditional clamp, and structurally ensures the constancy of the axial position of the pipeline 14 and the repeat positioning accuracy. This positioning mode not only can realize the stable clamping of a single pipeline 14, but also can realize the automatic coaxial or coaxial grouping of pipelines 14 with different diameters when arranged in multiple stations or in pairs, thereby providing reliable and unified reference conditions for subsequent cutting, beveling, welding and detection processes, and significantly improving the overall efficiency and processing quality of the pipeline 14 prefabrication.

[0032] The rotating mechanism comprises a cylinder body 6, the second ring body 2 is sleeved in the cylinder body 6, the linear slide rail is arranged on the inner wall of the cylinder body 6, and the linear slide rail comprises a linear sliding groove 7 opened on the inner wall of the cylinder body 6 and a sliding block 8 fixed on the second ring body 2 and in sliding cooperation with the linear sliding groove 7. The first ring body 1 is coaxially connected with the cylinder body 6, that is, a connecting annular slide rail is fixed coaxially on the front end face of the cylinder body 6, a circular sliding groove 9 is arranged on the inner side of the annular slide rail, and a radial convex rib 10 in sliding cooperation with the circular sliding groove 9 is arranged on the first ring body 1. The cylinder body 6 is fixed on the table top 3 through a support seat 18.

[0033] The rotating mechanism comprises a reset spring 11 arranged between the linear slide rail and the second ring body 2, which makes the second ring body 2 always have an elastic tendency to move towards the first ring body 1 in the state of no external force or driving release. Specifically, the reset spring 11 is a cylindrical spring arranged axially along the cylinder body 6, one end of which supports a blocking ring 12 fixed on the inner wall of the cylinder body 6, and the other end supports the outer side end face of the second ring body 2. In the natural state, the reset spring 11 makes the second ring body 2 closest to the first ring body 1, so that the distance between the connecting rods 4 is the smallest. When it is necessary to fix the pipeline 14, the pipeline 14 is inserted between the connecting rods 4 along the axis of the first ring body 1, the pipe diameter of the pipeline 14 is greater than the minimum distance between the connecting rods 4, and the connecting rods 4 are separated from each other under the top pressure of the end of the pipeline 14, so that the second ring body 2 moves away from the first ring body 1 against the force of the reset spring 11 until the pipeline 14 passes through the minimum position between the connecting rods 4, and the connecting rods 4 clamp the pipeline 14 under the action of the force of the reset spring 11. Since the distance between the connecting rods 4 is equal, the axis of the pipeline 14 coincides with the axis of the ring body, the function of fixed-axis fixing is realized, the reset spring 11 realizes the self-adaptive clamping function, and the pipeline 14 is fixed conveniently.

[0034] The distance between the middle portions of the connecting rods 4 is the smallest, and the distance between the end portions is the largest, so that the connecting rods 4 as a whole form a conical structure with the distance gradually decreasing from the end portion to the middle portion. The conical structure has a good guiding effect on the insertion of the pipeline 14.

[0035] The linear slide groove 7 can be a through groove located on the cylinder wall, so that part of the sliding block 8 is exposed outside the cylinder body 6. The exposed part can be provided with a handle 13, so that the movement of the sliding block 8 relative to the slide groove can be controlled through the handle 13, thereby controlling the distance between the two ring bodies, and then controlling the distance between the connecting rods 4. When it is necessary to insert the pipeline 14, the two ring bodies are moved away, and after the pipeline 14 is inserted, the handle 13 is loosened, so that the distance between the connecting rods 4 is reduced, thereby realizing the clamping and fixing of the pipeline 14.

[0036] As shown in Figure 9 , 10 , the table top 3 can be provided with a plurality of pipeline positioning devices, and four pipeline positioning devices are arranged in the embodiment. The four pipeline positioning devices are coaxially arranged in pairs, and the axes of the coaxial two pipeline positioning devices and the other two pipeline positioning devices are arranged perpendicularly in a plane. The coaxial two pipeline positioning devices can make two pipelines 14 of different pipe diameters coaxial and corresponding, which can be used for the machining operation of coaxial double-layer pipelines 14. The axes of the two pipeline positioning devices perpendicular to each other can make the axes of the pipelines 14 of different pipe diameters correspond in the same plane, and the pipelines 14 of different pipe diameters are connected vertically.

[0037] Embodiment two As shown in Figure 11 The first ring body 1 is coaxially provided with a driven gear 15, and the barrel body 6 is provided with a motor 17, and the motor 17 is provided with a driving gear 16 engaged with the driven gear 15 on the rotating shaft, that is, the rotation of the first ring body 1 relative to the second ring body 2 can be automatically controlled by using the motor 17 and the like automatic equipment, and then the spacing of the connecting rod 4 is controlled, which is conducive to the cooperative use with automatic equipment such as industrial robots and the like. 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 this application without departing from the spirit or scope of the application as defined by the following claims.

Claims

1. A pipe pre-fabrication platform comprising a table and a plurality of pipe positioning devices disposed on the table, wherein, The pipe positioning device includes a fixed-axis deformation frame and a rotating mechanism. The fixed-axis deformation frame includes a first ring and a second ring arranged coaxially. The first ring and the second ring are connected by several circumferentially distributed connecting rods of equal length. The two ends of the connecting rods are respectively connected to the first ring and the second ring through ball joints. The first ring is rotatably supported on the annular slide rail, and the second ring is slidably arranged on the linear slide rail. The rotating mechanism controls the first ring to rotate relative to the second ring.

2. The pipe pre-fabrication platform of claim 1, wherein, The rotating mechanism includes a cylinder, the second annular body is slidably sleeved inside the cylinder, and the linear slide rail is disposed on the inner wall of the cylinder.

3. The pipe pre-fabrication platform of claim 2, wherein, The rotating mechanism includes a return spring disposed between the linear slide rail and the second ring body, the return spring causing the second ring body to tend to move toward the first ring body.

4. The pipe pre-fabrication platform of claim 3, wherein, The linear slide rail includes a linear groove formed on the inner wall of the cylinder and a slider fixed on the second ring body that slides in cooperation with the linear groove.

5. The pipe pre-fabrication platform of claim 4, wherein, The linear slide includes a through groove located on the cylinder wall, and the slider is connected to an external handle through the through groove.

6. The pipe pre-fabrication platform of claim 2, wherein, The first ring body is rotatably connected to the cylinder body on the same axis.

7. The pipe pre-fabrication platform of claim 6, wherein, The first ring body is coaxially provided with a driven gear, the cylinder body is provided with a motor, and the motor shaft is provided with a driving gear that meshes with the driven gear.

8. The pipe pre-fabrication platform of claim 1, wherein, The platform is equipped with multiple pipe positioning devices.

9. The pipe pre-fabrication platform of claim 8, wherein, The annular axes of the multiple pipe positioning devices are collinear.

10. The pipe pre-fabrication platform of claim 8, wherein, The annular axes of the multiple pipe positioning devices are located perpendicularly in the same plane.

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