CN113478145B - Device and method for assembling branch pipe and flange of low-speed diesel engine - Google Patents
Device and method for assembling branch pipe and flange of low-speed diesel engine Download PDFInfo
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- CN113478145B CN113478145B CN202110663986.0A CN202110663986A CN113478145B CN 113478145 B CN113478145 B CN 113478145B CN 202110663986 A CN202110663986 A CN 202110663986A CN 113478145 B CN113478145 B CN 113478145B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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Abstract
A device and a method for assembling a branch pipe and a flange of a low-speed diesel engine in an assembling way comprise a disc, a screw knob, a clamping block, a screw, a gasket, a support rod, a lifting block, a cross rod sliding block and a fixing bolt; the disc is provided with a vertical upward central shaft and two straight grooves distributed on two sides, the screw rod is arranged in the two straight grooves in a penetrating mode, external threads in opposite rotating directions are arranged at two ends of the screw rod, clamping blocks are connected to two ends of the screw rod and embedded in the two straight grooves, screw knobs are fixed at two ends of the screw rod, the screw rod is rotated and drives the clamping blocks to clamp the flange in the center of the disc, the gasket is placed in an inner hole of the flange, the lifting block is hinged to the support rod and sleeved on the central shaft, the lower end of the support rod is supported on the gasket and contacted with the inner wall of the branch pipe, the branch pipe is coaxial with the central shaft, the cross rod sliding block is sleeved on the central shaft, and the cross rod sliding block is locked by the fixing bolt and presses the branch pipe. The invention is suitable for assembling the branch pipe flanges with different specifications, has the advantages of strong universality, high working efficiency and high assembling precision, and improves the product quality.
Description
Technical Field
The invention relates to manufacturing of a marine low-speed diesel engine, in particular to a device and a method for assembling a branch pipe and a flange of a low-speed diesel engine in an assembling mode, and belongs to the technical field of diesel engine manufacturing.
Background
In the manufacturing of the marine low-speed diesel engine pipe fitting, the branch pipe and the flange are assembled in a pairing mode, and due to the characteristics of the structural form, the marine low-speed diesel engine pipe fitting can be manufactured in a batch mode. The welding of the existing branch pipe flange is automatically welded by a welding manipulator, the assembly clearance of the branch pipe flange is inconsistent, the welding quality of the manipulator is unstable due to the deviation of the welding position of a workpiece in batch welding operation, the precision of the size angle is low, and problems can occur in subsequent piping installation. The existing production and manufacturing method for assembling the branch pipe flange assembly has the defects that the assembly size and angle manufacturing precision is poor, the centers of the branch pipes and the flange cannot be ensured to be coaxial, and the welding gaps are inconsistent, so that the welding quality of the branch pipe flange in the subsequent process is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the existing assembly operation of the flange of the branch pipe, and provides a device and a method for assembling the flange of the branch pipe of a low-speed diesel engine, which ensure the assembly coaxiality of the branch pipe and the flange, improve the assembly and manufacturing precision of the flange of the branch pipe, solve the problem of inconsistent assembly welding line gaps of the flange of the branch pipe, and improve the assembly efficiency and the manufacturing quality of the flange of the branch pipe.
Based on the above purpose, the technical scheme provided by the invention is as follows:
the utility model provides a device that is used for low-speed diesel engine branch pipe and flange group to assemble, the upper end of branch pipe is concave circular-arc's saddle mouth, the lower extreme with flange joint, its characterized in that, the device include:
a disc located at the bottom of the device; the center is provided with a vertical upward central shaft, the upper plane is used for placing the flange, and the two straight grooves distributed on the two sides of the central shaft are arranged along the diameter of the disc and are communicated through straight holes;
the screw is a double-head screw, penetrates through the two straight grooves and the straight holes of the disc, and is provided with external threads with opposite rotation directions at two ends;
the two clamping blocks are respectively connected to two ends of the screw rod and embedded in the two straight grooves of the disc, and are used for clamping the flange;
the two screw rod knobs are respectively fixed at two ends of the screw rod and used for adjusting the positions of the two clamping blocks, the two screw rod knobs rotate the screw rod to drive the two clamping blocks to translate in opposite directions along the straight groove, and the distances between the two clamping blocks and the center of the disc are always equal, so that the flange is clamped in the center of the disc;
the gaskets are placed on the upper plane of the disc and positioned in the inner hole of the flange;
the lifting block is sleeved on the central shaft of the disc and positioned in the inner cavity of the branch pipe, and can slide up and down along the central shaft of the disc;
the two support rods are respectively hinged on two sides of the lifting block, and the lower ends of the two support rods are supported on the gasket and are in contact with the inner wall of the branch pipe, so that the branch pipe is coaxial with the central shaft of the disc;
the cross bar sliding block is sleeved on the central shaft of the disc, positioned above the lifting block and the branch pipe, and can slide up and down along the central shaft and rotate around the central shaft;
and the fixing bolt is screwed in the locking threaded hole to lock the cross bar sliding block and press the branch pipe.
As a further improvement, the upper part of the clamping block is a clamping part which is higher than the upper plane of the disc, the side surface of the clamping block is V-shaped, the lower part of the clamping block is a connecting part which is embedded into the straight groove of the disc, and a threaded hole connected with the screw rod is arranged.
As a further improvement, the threaded holes of the two clamping blocks are provided with internal threads with opposite screwing directions.
As a further improvement, the lifting block is a sleeve-type component, ear parts are arranged on two sides of the lifting block, side connecting holes are formed in the ear parts, and upper connecting holes are formed in the upper end of the supporting rod and hinged to the side connecting holes of the lifting block through round pins.
As a further improvement, the lower end of the stay bar is smooth and smooth, is in contact with the gasket and the inner wall of the branch pipe, and slides up and down along with the lifting block.
As a further improvement, the size and the thickness of the gasket are selected according to branch pipes with different specifications.
The other technical scheme of the invention is as follows:
a method for assembling a branch pipe and a flange of a low-speed diesel engine by the device comprises the following specific steps:
1) penetrating a flange to be assembled through a central shaft on the disc and placing the flange on the upper plane of the disc;
2) rotating screw knobs at two ends of the screw to drive the two clamping blocks to clamp the flange, so that the flange is coaxial with a central shaft on the disc;
3) selecting a gasket with proper size and thickness according to the wall thickness of the branch pipes with different specifications, and placing the gasket on the upper plane of the disc in the inner hole of the flange to ensure that the distance from the sealing surface of the flange to the port of the branch pipe meets the requirements of an assembly process;
4) a branch pipe to be assembled penetrates through a central shaft of the disc, a saddle opening is upwards placed on a gasket in an inner hole of the flange, and the outer wall of the branch pipe is in contact with the inner wall of the flange;
5) hinging the lifting block and the two support rods into a whole, sleeving the lifting block on a central shaft of the disc, sliding up and down along the central shaft, and adjusting the lifting block until the two support rods are in contact with the gasket and the inner wall of the branch pipe so that the branch pipe is coaxial with the central shaft;
6) the cross bar sliding blocks are arranged on the central shaft, the two cross bars are pressed to the lowest position of a saddle opening on the branch pipe, the direction of the saddle opening is adjusted, and the cross bar sliding blocks are fixed and pressed on the branch pipe through the fixing bolts;
7) performing tack welding on the fixed flange and the branch pipe to complete the assembly of the branch pipe and the flange;
8) and loosening the fixing bolts of the screw rod knob and the cross rod sliding block, and taking down the branch pipe and the flange which are assembled.
Compared with a manual mode of assembling the branch pipe and the flange in a pairing manner, the invention achieves the following effects:
1. the problem of branch pipe and flange assembly back axis decentraction, flange hole and branch pipe outer wall clearance not of uniform size is solved, the precision of group to the assembly has been improved.
2. The device is used for assembling and assembling operation, and the requirement on the operating skill of an operator is not high.
3. The device is suitable for assembly of branch pipes and flanges of various specifications, and reduces tooling cost.
4. The reworking of the quality problem of the welding seam caused by the problem of the welding gap is avoided, and the manufacturing efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a sectional view of fig. 1.
Fig. 3 is a schematic view of a disc.
Fig. 4 is a schematic view of a screw knob.
Figure 5 is a schematic view of the clamping block.
Fig. 6 is a schematic view of a screw.
Fig. 7 is a schematic view of a gasket.
Fig. 8 is a schematic view of a strut.
Fig. 9 is a schematic view of the elevator block.
Fig. 10 is a schematic view of a crossbar slide.
Fig. 11 is a schematic view of a fixing bolt.
In the figure, 1-disc, 2-screw knob, 3-clamping block, 4-screw, 5-gasket, 6-flange, 7-branch pipe, 8-stay bar, 9-lifting block, 10-cross bar slide block, 11-fixing bolt, 20-central shaft, 21-straight groove, 22-clamping threaded hole, 23-upper connecting hole, 24-side connecting hole and 25-locking threaded hole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples. All equivalent changes and modifications made according to the contents of the present specification should fall within the scope of the claims of the present application.
Referring to fig. 1, a device for assembling a branch pipe flange pair is shown, which is used for assembling a branch pipe and a flange pair on a marine low-speed diesel engine pipe system. Referring to fig. 1, the flange 6 is connected to the lower end of the branch pipe 7 and is coaxial with the branch pipe 7, and the upper end of the branch pipe 7 is a concave circular arc saddle opening.
Referring to fig. 1 and 2, the device for assembling the branch pipe and the flange of the low-speed diesel engine comprises a circular disc 1, two screw knobs 2, two clamping blocks 3, a screw 4, a plurality of gaskets 5, two support rods 8, a lifting block 9, a cross rod sliding block 10 and a fixing bolt 11.
The disc 1 is positioned at the bottom of the whole device and is the foundation of the whole device. Referring to fig. 3, a vertical central shaft 20 is provided at the center of the horizontal disc 1, and two straight grooves 21 are provided on the upper plane of the disc 1 for mounting the screw rod 4 and the clamping block 3. The two straight grooves 21 are arranged along the diameter of the disc 1 and distributed on both sides of the central shaft 20 one by one, and the two straight grooves 21 are communicated through a straight hole passing through the center of the disc 1. Referring to fig. 2, the flange 6 is placed at the center of the upper plane of the disc 1 and is fitted around the center shaft 20 together with the branch pipe 7, and the branch pipe 7 is connected to the upper side of the flange 6.
Referring to fig. 6, the screw 4 is a double-threaded screw, and the two ends of the screw are provided with external threads and have opposite rotation directions, that is, one end is a left thread and the other end is a right thread. Referring to fig. 1, the screw rod 4 is installed in two straight grooves 21 of the disc 1 and passes through a straight hole connecting the two straight grooves 21; two ends of the screw rod 4 extend out of two ends of the two straight grooves 21.
The two screw knobs 2 are respectively and fixedly installed at two ends of the screw 4, please refer to fig. 4, and are used for rotating the screw 4.
Referring to fig. 1, the two clamping blocks 3 are respectively connected to two ends of the screw rod 4, and are respectively embedded in two straight grooves 21 of the disc 1 for clamping the flange 6. Referring to fig. 5, the upper portion of the clamping block 3 is a clamping portion, which is higher than the upper plane of the disc 1, and the side surface thereof is V-shaped; the lower part of the clamping block 3 is a connecting part which is embedded into a straight groove 21 of the disc 1 and is provided with a threaded hole 22 connected with the screw rod 4, and the threaded holes 22 of the two clamping blocks 3 are provided with internal threads with opposite screwing directions. After the clamping blocks 3 are arranged in the grooves 21, the relative positions of the two clamping blocks 3 can be adjusted through the screw knob 2; when the screw knob 2 rotates the screw 4, the two clamping blocks 3 can translate in the two straight grooves 21 and move in opposite directions, and the distances from the two clamping blocks 3 to the center of the disc 1 are always equal in the process, so that the flange 6 is clamped in the center of the disc 1.
Referring to fig. 2, the gasket 5 is placed in the inner hole of the flange 6, and during operation, the gasket 5 with a proper size and thickness is selected according to the wall thickness of the branch pipes 7 with different specifications, as shown in fig. 7.
Referring to fig. 2, the lifting block 9 is sleeved on the central shaft 20 of the disc 1 and located in the inner cavity of the branch pipe 7, and the lifting block 9 can slide up and down along the central shaft 20. Referring to fig. 9, the lifting block 9 is a sleeve-like member, and two sides of the lifting block are provided with ear portions, and the ear portions are provided with side connecting holes 24 for connecting the stay bars 8.
Referring to fig. 2 and 8, the two stay bars 8 are connected to the lifting block 9, the lower ends of the stay bars 8 are smooth and supported on the gasket 5 and contact the inner wall of the branch pipe 7, and the upper ends of the stay bars 8 are provided with upper connection holes 23 hinged to side connection holes 24 of the lifting block 9 through iron pins. The two support rods 8 and the lifting block 9 are connected to form an integral limiting device.
Referring to fig. 10, the rail slider 10 includes a circular ring portion at the center and two rails fixedly connected to two sides of the circular ring portion, the two rails are located on the same axis and pass through the center of the circular ring portion, and a locking threaded hole 25 for connecting the fixing bolt 11 is disposed on a side surface of the circular ring portion. Referring to fig. 2, the circular ring portion is sleeved on the central shaft 20 of the disc 1 and located above the lifting block 9 and the branch pipe 7, so that the cross bar sliding block 10 can slide up and down along the central shaft 20 and rotate around the central shaft 20. The direction of the saddle opening of the branch pipe 7 is adjusted, and the two cross rods are pressed at the lowest position of the saddle opening.
Referring to fig. 2 and 11, the fixing bolt 11 is screwed into the locking threaded hole 25, so that the cross bar sliding block 10 is locked on the central shaft 20 of the disc 1 and presses the branch pipe 7.
The method for assembling the branch pipe and the flange of the low-speed diesel engine through the device comprises the following specific steps, please refer to fig. 1 and fig. 2:
1) placing a flange 6 to be assembled on the upper plane of the disc 1 through a central shaft 20 on the disc 1;
2) the screw knobs 2 at the two ends of the screw 4 are rotated to drive the two clamping blocks 3 to clamp the flange 6, so that the flange 6 is coaxial with the central shaft 20 on the disc 1;
3) selecting a gasket 5 with proper size and thickness according to the wall thickness of the branch pipe 7 with different specifications, and placing the gasket at the position of an inner hole of the flange 6 to ensure that the distance from the sealing surface of the flange 6 to the port of the branch pipe 7 meets the requirements of an assembly process;
4) a branch pipe 7 to be assembled passes through a central shaft 20 on the disc 1, a saddle opening is upwards placed on the gasket 5 in the inner hole of the flange 6, and the outer wall of the branch pipe is contacted with the inner wall of the flange 6;
5) the lifting block 9 and the two support rods 8 are hinged into a whole through the side connecting holes 24 and the upper connecting holes 23 on the two sides, the lifting block 9 is sleeved on the central shaft 20 of the disc 1 and slides up and down along the central shaft 20, and the two support rods 8 are adjusted to be in contact with the gasket 5 and the inner wall of the branch pipe 7, so that the branch pipe 7 is coaxial with the central shaft 20;
6) installing a cross bar sliding block 10 on a central shaft 20 of the disc 1, adjusting two cross bars to press the lowest position of a saddle opening on the branch pipe 7, adjusting the direction of the saddle opening, screwing a fixing bolt 11 into a locking threaded hole 25 to fix the cross bar sliding block 10 and press the branch pipe 7;
7) positioning and welding 7 the fixed flange 6 and the branch pipe to complete the assembly of the branch pipe 7 and the flange 6;
8) and (3) loosening the fixing bolts 11 of the screw knob 2 and the cross bar sliding block 10, and removing the branch pipe 7 and the flange 6 which are completely assembled.
The scope of the invention is not limited to the embodiments described above, but also encompasses other variants and alternatives which are obvious for the invention.
Claims (7)
1. The utility model provides a device that is used for low-speed diesel engine branch pipe and flange group to assemble, the upper end of branch pipe is concave circular-arc's saddle mouth, the lower extreme with flange joint, its characterized in that, the device include:
a disc located at the bottom of the device; the center is provided with a vertical upward central shaft, the upper plane is used for placing the flange, and the two straight grooves distributed on the two sides of the central shaft are arranged along the diameter of the disc and are communicated through straight holes;
the screw is a double-head screw, penetrates through the two straight grooves and the straight holes of the disc, and is provided with external threads with opposite rotation directions at two ends;
the two clamping blocks are respectively connected to two ends of the screw rod, embedded in the two straight grooves of the disc and used for clamping the flange;
the two screw rod knobs are respectively fixed at two ends of the screw rod and used for adjusting the positions of the two clamping blocks, the two screw rod knobs rotate the screw rod to drive the two clamping blocks to translate in opposite directions along the straight groove, and the distances between the two clamping blocks and the center of the disc are always equal, so that the flange is clamped in the center of the disc;
the gaskets are placed on the upper plane of the disc and positioned in the inner hole of the flange;
the lifting block is sleeved on the central shaft of the disc and positioned in the inner cavity of the branch pipe, and can slide up and down along the central shaft of the disc;
the two support rods are respectively hinged on two sides of the lifting block, and the lower ends of the two support rods are supported on the gasket and are in contact with the inner wall of the branch pipe, so that the branch pipe is coaxial with the central shaft of the disc;
the cross bar sliding block is sleeved on the central shaft of the disc, positioned above the lifting block and the branch pipe, and can slide up and down along the central shaft and rotate around the central shaft;
and the fixing bolt is screwed in the locking threaded hole to lock the cross bar sliding block and press the branch pipe.
2. The device for assembling the branch pipe and the flange of the low-speed diesel engine as claimed in claim 1, wherein the upper part of the clamping block is a clamping part which is higher than the upper plane of the disc, the side surface of the clamping block is V-shaped, the lower part of the clamping block is a connecting part which is embedded in the straight groove of the disc, and a threaded hole connected with the screw rod is arranged.
3. The device for assembling the branch pipe and the flange group of the low-speed diesel engine as claimed in claim 2, wherein the threaded holes of the two clamping blocks are provided with internal threads with opposite screwing directions.
4. The device for assembling the branch pipe and the flange of the low-speed diesel engine according to claim 1, wherein the lifting block is a sleeve-like member, and both sides of the lifting block are provided with ear parts, the ear parts are provided with side connecting holes, the upper end of the stay bar is provided with an upper connecting hole, and the stay bar is hinged with the side connecting holes of the lifting block through round pins.
5. The apparatus for assembling a branch pipe and a flange assembly of a low speed diesel engine according to claim 1, wherein the lower end of the stay is rounded and contacts the gasket and the inner wall of the branch pipe to slide up and down together with the elevator block.
6. The device for assembling the branch pipe and the flange group of the low-speed diesel engine as claimed in claim 1, wherein the gasket is selected from sizes and thicknesses according to branch pipes with different specifications.
7. A method for assembling a branch pipe and a flange group of a low-speed diesel engine, which is realized by the device of claim 1, is characterized by comprising the following specific steps:
1) penetrating a flange to be assembled through a central shaft on the disc and placing the flange on the upper plane of the disc;
2) rotating screw knobs at two ends of the screw to drive the two clamping blocks to clamp the flange, so that the flange is coaxial with a central shaft on the disc;
3) selecting a gasket with proper size and thickness according to the wall thickness of the branch pipes with different specifications, and placing the gasket on the upper plane of the disc in the inner hole of the flange to ensure that the distance from the sealing surface of the flange to the port of the branch pipe meets the requirements of an assembly process;
4) a branch pipe to be assembled penetrates through a central shaft of the disc, a saddle opening is upwards placed on a gasket in an inner hole of the flange, and the outer wall of the branch pipe is in contact with the inner wall of the flange;
5) hinging the lifting block and the two support rods into a whole, sleeving the lifting block on a central shaft of the disc, sliding up and down along the central shaft, and adjusting the lifting block until the two support rods are in contact with the gasket and the inner wall of the branch pipe so that the branch pipe is coaxial with the central shaft;
6) the cross bar sliding blocks are arranged on the central shaft, the two cross bars are pressed to the lowest position of a saddle opening on the branch pipe, the direction of the saddle opening is adjusted, and the cross bar sliding blocks are fixed and pressed on the branch pipe through the fixing bolts;
7) performing tack welding on the fixed flange and the branch pipe to complete the assembly of the branch pipe and the flange;
8) and loosening the fixing bolts of the screw rod knob and the cross rod sliding block, and taking down the branch pipe and the flange which are assembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110663986.0A CN113478145B (en) | 2021-06-16 | 2021-06-16 | Device and method for assembling branch pipe and flange of low-speed diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110663986.0A CN113478145B (en) | 2021-06-16 | 2021-06-16 | Device and method for assembling branch pipe and flange of low-speed diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113478145A CN113478145A (en) | 2021-10-08 |
| CN113478145B true CN113478145B (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110663986.0A Active CN113478145B (en) | 2021-06-16 | 2021-06-16 | Device and method for assembling branch pipe and flange of low-speed diesel engine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115351453B (en) * | 2022-10-12 | 2023-09-26 | 定襄县伟艳锻造有限公司 | Welding processing technology for valve and flange connection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3837061A (en) * | 1972-05-31 | 1974-09-24 | Mitsui Shipbuilding Eng | Apparatus for positioning a flange |
| JP2001058290A (en) * | 1999-08-20 | 2001-03-06 | Marui:Kk | Jig for fitting flange at right angle to tube end part |
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|---|---|
| CN113478145A (en) | 2021-10-08 |
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