A device and method for hydraulic welding of sections of a marine diesel engine base

Abstract

The present invention discloses a device and method for hydraulically welding a segmented engine base of a marine diesel engine, which solves the problem in the prior art that it is necessary to rely on manual use of multiple jacks to adjust and fix the gap between the wing plate and the intermediate body, which is inefficient and cannot effectively meet the gap control requirements. The specific scheme is as follows: A device for hydraulically welding a segmented engine base of a marine diesel engine, comprising a base, a plurality of positioning blocks for positioning the intermediate body and the wing plate are fixed to the top surface of the base, at least two groups of brackets are arranged laterally on the upper side of the base, each group of brackets includes two and are longitudinally distributed along the top surface of the base, and a plurality of hydraulic tightening devices are slidably connected on opposite sides of each group of brackets, the hydraulic tightening devices include a hydraulic cylinder for tightening the intermediate body and the wing plate; it can significantly improve the gap control accuracy when the wing plate and the intermediate body are overlapped and assembled, while reducing the labor intensity of workers, and effectively improving the segmented assembly efficiency of some types of marine diesel engine bases.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine base welding, in particular to a device and method for hydraulically welding a segmented diesel engine base for a ship. Background Art

[0002] The main structure of the engine base of some types of marine diesel engines consists of an intermediate body and four wing panels. According to the construction specifications, in addition to ensuring the dimensional requirements during assembly welding, there are also strict requirements on the gap between the wing panels and the intermediate body.

[0003] The inventors discovered that due to the influence of intermediate casting, deformation of the wing plate parent material, wing plate cutting, and groove errors, the dimensional consistency of the welds during continuous production of the same segment is low. Furthermore, manual adjustment and fixing of the gap between the wing plate and the intermediate body using multiple jacks is required, which is inefficient and cannot effectively meet the gap control requirements. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a hydraulic assembly welding device and method for the engine base of a marine diesel engine, which can significantly improve the gap control accuracy during the overlap assembly of the wing plate and the intermediate body, while reducing the labor intensity of workers and effectively improving the assembly efficiency of the engine base of some types of marine diesel engines.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In the first aspect, a hydraulic assembly welding device for a segmented engine base of a marine diesel engine is provided, comprising a base, a plurality of positioning blocks for positioning an intermediate body and wing plates being fixed to the top surface of the base, at least two groups of brackets being arranged laterally on the base, each group of brackets comprising two brackets and being longitudinally distributed along the top surface of the base, a plurality of hydraulic tightening devices being slidably connected on opposite sides of each group of brackets, the hydraulic tightening devices comprising a hydraulic cylinder for tightening the intermediate body and wing plates.

[0007] As a further implementation, the bracket includes a shell, and opposite surfaces of the shell of each group of brackets are open.

[0008] As a further implementation, a plurality of suspension beams are fixedly provided at different heights along the opening side of the shell for connecting to the hydraulic cylinder.

[0009] As a further implementation method, the hydraulic tightening device also includes a sleeve, which is arranged on the outside of the hydraulic cylinder. A hanging groove is provided at one end of the sleeve, and the sleeve is slidably connected to the suspension beam through the hanging groove.

[0010] As a further implementation, the suspension groove is U-shaped, and its shape is adapted to the outer shape of the suspension beam.

[0011] As a further implementation, the sleeve has an opening on one side close to the suspension groove and is connected to a hydraulic pipeline, and the hydraulic pipeline is connected to the hydraulic cylinder through the opening.

[0012] As a further implementation method, a hydraulic switch is provided on the base, and the hydraulic switch is connected to a hydraulic tightening device.

[0013] As a further implementation, a pressure gauge is provided on the outside of the bracket.

[0014] In a second aspect, a method for hydraulically welding a sub-section of a marine diesel engine base is provided, which uses any of the above-described hydraulically welding devices for a marine diesel engine base, and specifically comprises the following steps:

[0015] Lift the intermediate body onto the base and weld positioning blocks on the base for positioning;

[0016] Adjust the hanging position of the inner hydraulic cylinder on the bracket, and control the hydraulic cylinder through the hydraulic switch and pressure gauge to tighten the intermediate body;

[0017] Lift the intermediate body onto the base and position it with the positioning block. Then adjust the suspension position of the hydraulic cylinder on the bracket. Use the hydraulic switch and pressure gauge to control the hydraulic cylinder to tighten the two sides of the wing plate to eliminate the gap. Then perform positioning welding.

[0018] Follow the same steps to weld the wing plate on the other side of the intermediate body.

[0019] As a further implementation method, when using the positioning block to position the wing plate, use common measuring tools such as a tape measure to further assist in measuring and verifying the assembly size, and then tighten the wing plate after confirming that the size is appropriate.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention provides a hydraulic jacking device on the bracket and performs positioning through the positioning block, thereby ensuring the consistency of products during repeated assembly of the engine base; by hydraulically tightening the intermediate body and the wing plate, the efficiency of segmented assembly of the engine base of some types of marine diesel engines can be effectively improved, and the gap control accuracy during the overlap assembly of the wing plate and the intermediate body can be significantly improved, while reducing the labor intensity of workers; the position of the hydraulic jacking device on the bracket is adjustable, which is convenient for freeing up welding space and ensuring the continuity of welding.

[0022] 2. A pressure gauge is provided on the outside of the bracket of the present invention, through which the tightening force of the hydraulic tightening device on each side of the bracket can be judged, thereby ensuring the balance of the tightening force of the hydraulic cylinders on both sides of the intermediate body and the wing plate, and facilitating the elimination of the gap between the intermediate body of the diesel engine base segment and the segmented wing plate of the diesel engine base. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 The present invention is a structural schematic diagram of a segmented hydraulic assembly welding device for a marine diesel engine base according to an embodiment of the present invention.

[0025] Figure 2 It is a structural schematic diagram of an embodiment of the present invention in which the intermediate body and the wing plate are positioned on the base through the positioning blocks.

[0026] Figure 3 It is a structural schematic diagram of a bracket provided on a base in an embodiment of the present invention.

[0027] Figure 4 It is a cross-sectional view of a hydraulic jacking device in an embodiment of the present invention.

[0028] Figure 5 yes Figure 4 Schematic diagram of the AA direction.

[0029] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0030] Including: 1. Intermediate body, 2. Wing plate, 3. Pressure gauge, 4. Bracket, 5. Hydraulic jacking device, 6. Hydraulic switch, 7. Positioning block, 8. Base;

[0031] 4-1. Suspension beam, 5-1. Hydraulic cylinder, 5-2. Sleeve, 5-3. Suspension groove, 5-4. Hydraulic pipeline. DETAILED DESCRIPTION

[0032] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0033] Example 1

[0034] In a typical embodiment of the present invention, referring to Figure 1-Figure 5 As shown, a hydraulic assembly welding device for a marine diesel engine base comprises a base 8, a plurality of positioning blocks 7 fixed to the top surface of the base 8 for positioning the intermediate body 1 and the wing plate 2. The positioning blocks 7 are fixed to the base 8 on both sides of the intermediate body 1 and the wing plate 2, thereby positioning the bottom ends of the intermediate body and the wing plate.

[0035] The base 8 of this embodiment is a rectangular steel plate, and its top surface is flat. Figure 1As shown, in this embodiment, the length of the base 8 is defined as the horizontal direction, and the width of the base 8 is defined as the vertical direction. Two sets of brackets 4 are disposed along the horizontal direction on the base 8. Each set of brackets 4 includes two brackets 4. The two brackets 4 are longitudinally distributed along the top surface of the base 8, and the two brackets 4 are disposed opposite each other, with the brackets 4 being located near the longitudinal side of the base 8. Therefore, in this embodiment, two sets of brackets 4 are provided, totaling four brackets.

[0036] like Figure 1 and Figure 3 As shown, each bracket 4 includes a shell, the inner sides of the shell of each group of brackets 4 are open on opposite sides, and the other sides are connected by welding steel plates. Multiple suspension beams 4-1 are fixedly arranged at different heights along the open side of the shell for connecting the hydraulic cylinder.

[0037] In this embodiment, three suspension beams 4-1 are horizontally arranged on the opening side of the bracket. The two ends of the three suspension beams 4-1 are welded and fixed to the side of the bracket 4. The three suspension beams 4-1 are located at different heights, close to the bottom, middle and top positions of the intermediate body 1 and the wing plate 2 respectively.

[0038] The cross section of the suspension beam 4 - 1 is rectangular. The suspension beams 4 - 1 on opposite sides of each group of brackets 4 are slidably connected to multiple hydraulic jacking devices 5 . The hydraulic jacking devices 5 include hydraulic cylinders 5 - 1 for tightening the intermediate body 1 and the wing plate 2 .

[0039] like Figure 4 and Figure 5 As shown, the hydraulic tightening device 5 also includes a sleeve 5-2, which is arranged on the outside of the hydraulic cylinder. The sleeve 5-2 is used to protect the hydraulic cylinder 5-1. The sleeve 5-2 is open at one end close to the output end of the hydraulic cylinder 5-1, and is used for the output end of the hydraulic cylinder 5-1 to extend to tighten the intermediate body 1 and the wing plate 2.

[0040] The other end of the sleeve 5-2 is provided with a suspension groove 5-3, which is slidably connected to the suspension beam 4-1 through the suspension groove 5-3. The suspension groove 5-3 is U-shaped and inverted, and its shape is adapted to the appearance of the suspension beam.

[0041] The sleeve has an opening near the suspension slot that connects to hydraulic line 5-4, which in turn connects to the hydraulic cylinder. A hydraulic switch 6 is mounted on the base 8 and connected to the hydraulic jacking device 5. This switch is located on one side of the bracket and controls the movement of the hydraulic cylinder 5-1. A pressure gauge 3 is mounted on the outer wall of the bracket 4 and connected to hydraulic line 5-4 to display the pressure.

[0042] like Figure 3As shown, each suspension beam 4-1 on the bracket 4 is equipped with two hydraulic jacking devices 5. During the actual resist welding, it is necessary to locate the overlap position of the two ends of the welding intermediate body 1 and the wing plate 2. The intermediate body 1 is hoisted in the middle position of the base 8, and the side of the intermediate body 1 is parallel to the length direction of the base 8. The two brackets 4 on one side of the intermediate body 1 are welded to the base 8, and each bracket 4 is close to the two ends of the intermediate body 1 in the horizontal direction, so that multiple hydraulic cylinders on one bracket 4 can tighten the intermediate body 1 and the wing plate 2.

[0043] In this embodiment, two hydraulic cylinders 5-1 are mounted on a single suspension beam 4-1. These hydraulic cylinders 5-1 slide along the suspension beam 4-1 via suspension slots 5-3, allowing for adjustment of their lateral position. The three suspension beams 4-1 facilitate the positioning of different hydraulic cylinders 5-1 to press against the top, middle, and bottom of the intermediate body and wing panels, preventing deflection of the intermediate body 1 and wing panels 2 and ensuring high-quality, efficient production of the diesel engine base's segmented assembly welding.

[0044] Two hydraulic cylinders 5-1 are mounted on the suspension beams of each bracket 4, one of which is used to tighten the intermediate body 1 while the other is used to tighten the wing plates 2. The two ends of the intermediate body 1 are welded to the two wing plates 2, which are parallel to each other and overlap the intermediate body 1 at one end. Because a support is provided between the two wing plates 2, the relative position of the two wing plates 2 does not change when the hydraulic cylinders 5-1 on the bracket 4 are extended to tighten the wing plates 2.

[0045] The positioning block 7 is a cubic structure and is mounted on the base 8 by welding or bolts, preferably welding. When different types of machine bases need to be welded together, if the position of the original positioning block does not fit, the positioning block can be directly ground off or cut off by a machine.

[0046] Through the production and implementation of a hydraulic assembly welding device for marine diesel engine sections, the efficiency of section assembly of some types of marine diesel engine bases can be effectively improved, and the gap control accuracy during the overlap assembly of the wing plates and the intermediate body can be significantly improved, meeting the requirements of construction specifications while reducing the labor intensity of workers.

[0047] Example 2

[0048] A method for hydraulically welding a sub-section of a marine diesel engine base is provided, using the hydraulically welding sub-section of a marine diesel engine base described in Example 1, and specifically comprises the following steps:

[0049] When in use, the diesel engine base segmented intermediate body 1 is first lifted to the center position of the base 8 and positioned by the positioning block 7. The positioning block 7 is welded to the side of the bottom of the intermediate body according to the specific situation to prevent the bottom position of the intermediate body 1 from changing.

[0050] At this time, adjust the hanging position of the hydraulic jacking device 5 on the inner side of the opposite surface of the bracket, and control the hydraulic jacking devices 5 on both sides through the hydraulic switch 6 and the hydraulic device pressure gauge 3 to tighten and fix the diesel engine base segmented intermediate body 1.

[0051] The two diesel engine base segmented wing panels 2 on one side of the segmented intermediate body 1 are hoisted onto the platform and positioned using the positioning blocks 7. During positioning, common measuring tools such as a tape measure are used to further assist in measuring and verifying the assembly dimensions. Specifically, a tape measure or a ruler is used to measure the distance between the edge of the wing panel and the theoretical center of the segment to verify that the assembly meets the drawing requirements; a tape measure or a ruler is also used to measure the height of the wing panel edge from the assembly platform to verify that the assembly meets the drawing requirements. The main purpose of these two dimensional measurements is to self-check the final assembly dimensions during the assembly process, thereby preventing deviations in the segmented assembly from interfering with the subsequent product assembly.

[0052] After confirming that the size is appropriate, the hydraulic tightening devices 5 on both sides are controlled by the hydraulic switch 6 and the pressure gauge 3 to tighten and fix the diesel engine base segment wing plate 2. After the tightening eliminates the gap between the diesel engine base segment intermediate body 1 and the diesel engine base segment wing plate 2, they are tack welded and fixed; similarly, the two diesel engine base segment wing plates 2 on the other side are welded; after the welding is completed, the hydraulic cylinder is controlled to be retracted by the hydraulic switch 6 to lift the welded engine base; the other diesel engine sections are welded in turn by repeating this process.

[0053] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for hydraulic welding of sections of a marine diesel engine base, characterized in that: A hydraulic assembly welding device for a marine diesel engine base is used. The device includes a base, a plurality of positioning blocks for positioning an intermediate body and wing plates are fixed to the top surface of the base, at least two groups of brackets are arranged in the transverse direction of the base, each group of brackets includes two brackets and are distributed longitudinally along the top surface of the base, and a plurality of hydraulic jacking devices are slidably connected to the opposite sides of each group of brackets. The hydraulic jacking devices include hydraulic cylinders for tightening the intermediate body and wing plates; The brackets include a housing, and opposite sides of the housing of each group of brackets are open; A plurality of suspension beams are fixedly provided at different heights along the opening side of the housing for connecting to the hydraulic cylinder; Two hydraulic cylinders are installed on the suspension beam on each bracket, so that one hydraulic cylinder can press the intermediate body tightly and the other hydraulic cylinder can press the wing plate tightly. The hydraulic cylinders can slide along the suspension beam through the suspension groove to adjust the lateral position of the hydraulic cylinders. A pressure gauge is installed on the outside of the bracket. The pressure gauge can be used to judge the tightening force of the hydraulic tightening device on each side of the bracket to ensure the balance of the tightening force of the hydraulic cylinders on both sides of the intermediate body and the wing plate, so as to eliminate the gap between the intermediate body of the diesel engine base segment and the wing plate of the diesel engine base segment. Lift the intermediate body onto the base and weld positioning blocks on the base for positioning; Adjust the hanging position of the inner hydraulic cylinder on the bracket, and control the hydraulic cylinder through the hydraulic switch and pressure gauge to tighten the intermediate body; Lift the wing plate on one side of the intermediate body onto the base and position it using the positioning block. Then adjust the suspension position of the hydraulic cylinder on the bracket. Use the hydraulic switch and pressure gauge to control the hydraulic cylinder to tighten both sides of the wing plate to eliminate the gap. Then perform positioning welding. Follow the same steps to weld the wing plate on the other side of the intermediate body. The two ends of the intermediate body are respectively welded to two wing plates. The two wing plates are parallel and one end is overlapped with the intermediate body. Since a support is provided between the two wing plates, the relative position between the two wing plates will not change when the hydraulic cylinder on the bracket is extended to tighten the wing plates.

2. The method for hydraulic welding of sections of a marine diesel engine base according to claim 1, characterized in that: The hydraulic jacking device also includes a sleeve, which is arranged on the outside of the hydraulic cylinder. A hanging groove is provided at one end of the sleeve, and the sleeve is slidably connected to the suspension beam through the hanging groove.

3. The method for hydraulic welding of sections of a marine diesel engine base according to claim 2, characterized in that: The suspension groove is U-shaped, and its shape is adapted to the outer shape of the suspension beam.

4. The method for hydraulic welding of sections of a marine diesel engine base according to claim 2, characterized in that: The sleeve has an opening on one side close to the suspension groove and is connected to a hydraulic pipeline, and the hydraulic pipeline is connected to a hydraulic cylinder through the opening.

5. The method for hydraulic welding of sections of a marine diesel engine base according to claim 4, characterized in that: A hydraulic switch is provided on the base, and the hydraulic switch is connected to a hydraulic jacking device.

6. The method for hydraulic welding of sections of a marine diesel engine base according to claim 1, characterized in that: When using the positioning block to position the wing plate, use a tape measure to further assist in measuring and verifying the assembly dimensions. After confirming that the dimensions are appropriate, tighten the wing plate.

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