A tooling applicable to the assembly of small-diameter pipe flanges

Abstract

The present invention discloses a tooling applicable to the assembly of small-diameter pipe flanges, which relates to the field of pipe fitting flange assembly. A chute is provided on a fixed base, and a horizontal moving bottom plate is arranged through the chute. The right end of the moving bottom plate is connected to a vertically upward moving base; a steel pipe clamping mechanism is supported on the fixed base; a steel pipe is clamped on the steel pipe clamping mechanism; an internal expander is fixed inside the right end of the steel pipe, and the end of a first lead screw is rotatably connected inside the internal expander. The first lead screw is in threaded connection with the moving base; a fixed sleeve is fixed on the left side surface of the moving base; a rotating sleeve is rotatably arranged around the outer side surface of the fixed sleeve; a flange positioning mechanism is fixed on the left part of the rotating sleeve, and a flange is fixed on the flange positioning mechanism; a pointer is perpendicularly connected to the outer side wall of the rotating sleeve at the right part of the rotating sleeve; an angle dial plate adjacent to the pointer is further arranged on the moving base. The present invention solves the problem of low manual operation precision in the traditional assembly process of pipes and flanges.

Description

Technical Field

[0001] The present invention relates to the field of pipe flange assembly, and more specifically, to a tooling suitable for the flange assembly of small-diameter pipes. Background Art

[0002] During the production process of ship pipes, there is a large amount of work on the assembly of flanges and pipes. Due to the very complex shapes and specifications of ship pipes, especially small-diameter pipes, it is difficult to achieve mechanized automatic assembly welding. At present, the processing of ship pipes in China still adopts the single-piece production method of manual equipment assembly and welding on the platform. This construction method has low efficiency and inaccurate manual positioning accuracy. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a tooling suitable for the flange assembly of small-diameter pipes, so as to reduce the variables in the flange assembly process through a fixing mechanism, quantify the information required for flange assembly to simplify the selection method of positioning information, and thus accurately and quickly position the flange and the pipe at the assembly point.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A tooling suitable for the flange assembly of small-diameter pipes includes a fixed base, a chute is provided on the fixed base, a horizontal moving bottom plate is arranged through the chute, and the right end of the moving bottom plate is connected to a vertically upward moving base;

[0006] A steel pipe clamping mechanism is supported on the fixed base; a horizontal steel pipe extending in the left-right direction is clamped on the steel pipe clamping mechanism;

[0007] An internal expander is fixed inside the right end of the steel pipe, the left end of a horizontal first lead screw is rotatably connected inside the internal expander, the right end of the first lead screw passes through a threaded hole provided on the moving base and is connected to a first rotating handle; the first lead screw is in threaded connection with the moving base;

[0008] A horizontal fixed sleeve is fixed on the left side surface of the moving base, and the fixed sleeve is centered on the first lead screw;

[0009] A rotating sleeve is rotatably arranged around the outer side surface of the fixed sleeve; a flange positioning mechanism is fixed on the left part of the rotating sleeve, and a flange centered on the first lead screw is fixed on the flange positioning mechanism; a pointer is perpendicularly connected to the outer side wall of the rotating sleeve at the right part of the rotating sleeve; an angle dial adjacent to the pointer is also arranged on the moving base.

[0010] The steel pipe clamping mechanism includes a front fixing block fixed at the front end of the fixed base and a rear fixing block fixed at the rear end of the fixed base; a second lead screw is rotatably arranged through the front fixing block, the front end of the second lead screw is connected to a second rotating handle, and the rear end of the second lead screw is rotatably connected to the rear fixing block;

[0011] The front thread of the second lead screw is threadedly connected with a front clamping block; the rear thread of the second lead screw is threadedly connected with a rear clamping block; the rotation direction of the front thread of the second lead screw is opposite to the rotation direction of the rear thread of the second lead screw;

[0012] The front clamping block and the rear clamping block are restricted from rotating by the fixed base.

[0013] The flange positioning mechanism includes a vertical flange fixing base welded and fixed to the rotating sleeve in the middle, and a third lead screw is rotatably arranged on the flange fixing base; the top of the third lead screw extends outside the flange fixing base and is connected with a third rotating handle;

[0014] The upper thread of the third lead screw is threadedly connected with an upper fixing block; the lower thread of the third lead screw is threadedly connected with a lower fixing block; the rotation direction of the upper thread of the third lead screw is opposite to the rotation direction of the lower thread of the third lead screw; the upper fixing block and the lower fixing block are restricted from rotating by the flange fixing base;

[0015] Positioning columns are arranged on both the upper fixing block and the lower fixing block.

[0016] Threads are provided on the outer side surface of the positioning column.

[0017] The internal expander includes a mandrel and small leaf plates arranged outside the mandrel.

[0018] The mandrel is formed by connecting two cones through their tips.

[0019] The advantages of the present invention over the prior art are that during the flange assembly process, the coaxiality and position parameters in the positioning relationship between the flange and the pipe are fixed, and the axial angle and axonometric angle parameters can be accurately positioned through calculation and the dial, effectively avoiding the assembly positioning errors caused by manual operation during actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front sectional view of the tooling of the present invention;

[0021] Figure 2 is the left sectional view of the flange positioning mechanism in the tooling of the present invention;

[0022] Figure 3 is the right sectional view of the steel pipe clamping mechanism in the tooling of the present invention.

[0023] In the figure, 1 is a fixed base, 2 is a steel pipe, 3 is a steel pipe clamping mechanism, 4 is an internal expander, 5 is a flange, 6 is a flange positioning mechanism, 7 is an angle dial, 8 is a moving base, 9 is a first lead screw, 10 is a flange fixing base, 11 is a third lead screw, 12 is a fixed sleeve, 13 is a rotating sleeve, 14 is a lower fixing block, 15 is an upper fixing block, 16 is a second lead screw, 17 is a front fixing block, 18 is a rear fixing block, 19 is a front clamping block, 20 is a rear clamping block, and 21 is a chute. Detailed implementation manner

[0024] The following describes the detailed implementation manner of the present invention with reference to the accompanying drawings.

[0025] As Figures 1 to 3 shown, a tooling suitable for assembling a flange of a small-diameter pipe according to the present invention includes a fixed base 1. A chute 21 is provided on the fixed base 1. A horizontal moving bottom plate is arranged through the chute 21, and the right end of the moving bottom plate is connected to a vertically upward moving base 8;

[0026] A steel pipe clamping mechanism 3 is supported on the fixed base 1; a horizontal steel pipe 2 extending in the left-right direction is clamped on the steel pipe clamping mechanism 3;

[0027] An internal expander 4 is fixed inside the right end of the steel pipe 2. The left end of a horizontal first lead screw 9 is rotatably connected inside the internal expander 4. The right end of the first lead screw 9 passes through a threaded hole provided on the moving base 8 and is then connected to a first rotating handle; the first lead screw 9 is in threaded connection with the moving base 8;

[0028] A horizontal fixed sleeve 12 is fixed on the left side surface of the moving base 8, and the fixed sleeve 12 takes the first lead screw 9 as the central axis;

[0029] A rotating sleeve 13 is rotatably arranged around the outer side surface of the fixed sleeve 12; a flange positioning mechanism 6 is fixed on the left part of the rotating sleeve 13, and a flange 5 taking the first lead screw 9 as the central axis is fixed on the flange positioning mechanism 6; a pointer is perpendicularly connected to the outer side wall of the rotating sleeve 13 at the right part of the rotating sleeve 13; an angle dial 7 adjacent to the pointer is also arranged on the moving base 8.

[0030] The steel pipe clamping mechanism 3 includes a front fixing block 17 fixed at the front end of the fixed base 1 and a rear fixing block 18 fixed at the rear end of the fixed base 1; a second lead screw 16 is rotatably arranged through the front fixing block 17. The front end of the second lead screw 16 is connected to a second rotating handle, and the rear end of the second lead screw 16 is rotatably connected to the rear fixing block 18;

[0031] The front part thread of the second lead screw 16 is in threaded connection with a front clamping block 19; the rear part thread of the second lead screw 16 is in threaded connection with a rear clamping block 20; the rotation direction of the front part thread of the second lead screw 16 is opposite to the rotation direction of the rear part thread of the second lead screw 16;

[0032] The front clamping block 19 and the rear clamping block 20 are restricted from rotating by the fixed base 1.

[0033] The flange positioning mechanism 6 includes a vertical flange fixing base 10 welded and fixed in the middle on the rotating sleeve 13. A third lead screw 11 is rotatably arranged on the flange fixing base 10; the top of the third lead screw 11 extends outside the flange fixing base 10 and is connected with a third rotating handle;

[0034] The upper part of the third lead screw 11 is threadedly connected with an upper fixing block 15 through threads; the lower part of the third lead screw 11 is threadedly connected with a lower fixing block 14 through threads; the rotation direction of the upper thread of the third lead screw 11 is opposite to the rotation direction of the lower thread of the third lead screw 11; the upper fixing block 15 and the lower fixing block 14 are restricted from rotating by the flange fixing base 10;

[0035] Both the upper fixing block 15 and the lower fixing block 14 are provided with positioning columns.

[0036] The outer side of the positioning column is provided with threads.

[0037] The internal expander includes a mandrel and small leaf plates arranged outside the mandrel.

[0038] The mandrel is formed by connecting two cones at their tips.

[0039] The above-mentioned rotational connection can be set through bearings, and no threads are provided at the bearing positions of the lead screws.

[0040] The principle of the internal expander 4 is a mandrel composed of two cones (thick at both ends and thin in the middle). Three arc-shaped chutes are opened on the mandrel. Three slidable small leaf plates (for tensioning) are embedded in the arc-shaped chutes. The three small leaf plates are fixed in the arc-shaped chutes of the mandrel through a spring ring. The installation position of the spring ring is slightly closer to the front end of the mandrel. So that the annular dimension formed by the small leaf plates around the mandrel is slightly smaller than the inner diameter of the steel pipe at the front end and larger than the inner diameter of the steel pipe at the rear end in the state without external force. The connection between the rear end of the mandrel and the screw is a T-shaped groove structure (or spherical structure). The characteristic of this structure is that there is only a front-back movement constraint and it can rotate freely, so that when the lead screw rotates, the internal expander 4 does not rotate accordingly.

[0041] The working principle of the internal expander 4:

[0042] 1. Insertion stage: Since the front end of the internal expander 4 is smaller than the inner diameter of the steel pipe, it can be inserted smoothly. As the internal expander 4 goes deeper, the rear end contacts the inner wall of the steel pipe, the small leaf plates slide, and the front end starts to contact the inner wall of the steel pipe and tighten.

[0043] 2. Pulling stage

[0044] After the front leaf plate is tensioned, quickly rotate the lead screw, causing the mandrel to tend to move backward. At this time, the inverted cone at the front end of the mandrel tensions the leaf plate, keeping the leaf plate in a tensioned state, thereby driving the moving base to move.

[0045] 3. Unloading stage

[0046] The lead screw first pushes the mandrel forward. At this time, the cone at the rear end of the mandrel is tensioned, causing the leaf plate to slide backward, and the front end to disengage from the inner wall of the steel pipe, achieving unloading. Then the lead screw rotates backward, driving the entire internal expander 4 to withdraw from the steel pipe.

[0047] When the present invention is used, the steel pipe 2 is placed between the front clamping block 19 and the rear clamping block 20. By rotating the second lead screw 16, the front clamping block 19 and the rear clamping block 20 slowly approach until the steel pipe 2 is finally clamped. Similarly, by rotating the second lead screw 16, the distance between the upper fixing block 15 and the lower fixing block 14 can be adjusted, so that the positioning posts of the upper fixing block 15 and the lower fixing block 14 just pass through the bolt holes of the flange 5. The positioning posts can be of a threaded structure and thus screwed into the bolt holes of the flange 5 for positioning and fixing, but they can also be of a pin structure. Rotating the flange 5 fixing seat drives the rotating sleeve 13 to rotate around the fixed sleeve 12, thereby adjusting the rotation angle of the flange 5. The corresponding rotation angle can be quantitatively viewed through the pointer and the angle dial 7. Then rotate the first lead screw 9. The first lead screw 9 will drive the moving base 8 to move. The moving base 8 drives the flange 5 to move towards the steel pipe 2. After the steel pipe 2 and the flange 5 are aligned, they can be welded and fixed.

[0048] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A tooling applicable to the assembly of small-diameter pipe flanges, characterized in that, It includes a fixed base (1), a chute (21) is formed on the fixed base (1), a horizontal moving bottom plate is arranged through the chute (21), and the right end of the moving bottom plate is connected to a vertically upward moving base (8); A steel pipe clamping mechanism (3) is supported on the fixed base (1); the steel pipe clamping mechanism (3) is used for clamping a horizontal steel pipe (2) extending in the left - right direction; The tooling further includes an internal expander (4), the internal expander (4) is used for being embedded and tightened inside the right end of the steel pipe (2), the left end of a horizontal first lead screw (9) is rotatably connected to the end of the internal expander (4), and the right end of the first lead screw (9) passes through a threaded hole formed on the moving base (8) and is connected to a first rotating handle; the first lead screw (9) is in threaded connection with the moving base (8); A horizontal fixed sleeve (12) is fixed to the left side surface of the moving base (8), and the fixed sleeve (12) takes the first lead screw (9) as the central axis; A rotating sleeve (13) is rotatably arranged around the outer side surface of the fixed sleeve (12); a flange positioning mechanism (6) is fixed to the left part of the rotating sleeve (13), and the flange positioning mechanism (6) is used for fixing a flange (5) taking the first lead screw (9) as the central axis; a pointer is perpendicularly connected to the outer side wall of the rotating sleeve (13) at the right part of the rotating sleeve (13); an angle dial (7) adjacent to the pointer is further arranged on the moving base (8); The steel pipe clamping mechanism (3) includes a front fixing block (17) fixed to the front end of the fixed base (1) and a rear fixing block (18) fixed to the rear end of the fixed base (1); a second lead screw (16) is rotatably arranged through the front fixing block (17), the front end of the second lead screw (16) is connected to a second rotating handle, and the rear end of the second lead screw (16) is rotatably connected to the rear fixing block (18); A front clamping block (19) is in threaded connection through the front thread of the second lead screw (16); a rear clamping block (20) is in threaded connection through the rear thread of the second lead screw (16); the rotation direction of the front thread of the second lead screw (16) is opposite to the rotation direction of the rear thread of the second lead screw (16); The front clamping block (19) and the rear clamping block (20) are restricted from rotating by the fixed base (1); The flange positioning mechanism (6) includes a vertical flange fixing base (10) welded and fixed in the middle on the rotating sleeve (13), a third lead screw (11) is rotatably arranged on the flange fixing base (10); the top of the third lead screw (11) extends out of the flange fixing base (10) and is connected to a third rotating handle; The upper part of the third lead screw (11) is threadedly connected with an upper fixing block (15); the lower part of the third lead screw (11) is threadedly connected with a lower fixing block (14); the rotation direction of the upper thread of the third lead screw (11) is opposite to that of the lower thread of the third lead screw (11); the upper fixing block (15) and the lower fixing block (14) are restricted from rotating by the flange fixing base (10); Positioning columns are arranged on both the upper fixing block (15) and the lower fixing block (14).

2. The tooling applicable to the assembly of small-diameter pipe flanges according to claim 1, characterized in that, Threads are arranged on the outer side surface of the positioning column.

3. The tooling applicable to the assembly of small-diameter pipe flanges according to claim 1, characterized in that, The internal expander (4) includes a mandrel and small leaf plates arranged outside the mandrel.

4. The tooling applicable to the assembly of small-diameter pipe flanges according to claim 3, characterized in that The mandrel is formed by connecting two cones at their tips.

5. The tooling applicable to the assembly of small-diameter pipe flanges according to claim 4, characterized in that, Three arc-shaped chutes are formed on the mandrel.

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