Marine diesel engine rack side plate bolt mounting and aligning device

Abstract

The utility model belongs to marine diesel engine assembly, and particularly relates to a marine diesel engine rack side plate bolt mounting and aligning device. The device comprises a steel pipe which is vertically arranged and used for inserting a to-be-installed bolt, and a supporting structure which is arranged on the outer side wall of the steel pipe and used for adjusting the perpendicularity between the to-be-installed bolt and a rack side plate where the to-be-installed bolt is installed. The lower end face of the steel pipe is not in contact with and parallel to the connecting face of the rack side plate and the to-be-installed bolt. The bottom face of the supporting structure makes contact with and is coplanar with the connecting face of the machine frame side plate and the to-be-installed bolt. The distance from the lower end face of the steel pipe to the upper surface of the rack side plate is larger than that from the bottom face of the supporting plate to the upper surface of the rack side plate. Automatic vertical positioning of the bolt is achieved through the combined structure of the steel pipe and the supporting plate, repeated measurement is not needed, the structure is simple, efficiency is high, precision is stable, and the device is particularly suitable for large-scale installation of small cylindrical bolts.

Description

Technical Field

[0001] This invention pertains to marine diesel engine assembly, specifically relating to a device for adjusting and mounting bolts on the side plates of a marine diesel engine frame. Background Technology

[0002] The bolt installation of the side plates of marine diesel engine frames is a critical process in shipbuilding. Traditionally, this method relies on manual measurement of bolt perpendicularity using a right-angle ruler. Since each side plate requires the installation of approximately 100 bolts, and each bolt needs to be measured and welded 2-3 times before being remeasured, the construction efficiency is low and the labor intensity is high.

[0003] The existing bolt installation method for the side plates of marine diesel engine frames has the following drawbacks: manual measurement is easily affected by the operator's experience, resulting in large fluctuations in accuracy; repeated adjustments and welding lead to long process cycles; and consistency is difficult to guarantee during batch installation, easily resulting in cumulative errors. Although some improvement solutions attempt to use fixing fixtures to assist in positioning, they suffer from poor versatility and inability to adapt to different bolt specifications. Summary of the Invention

[0004] To address the shortcomings of existing installation methods and devices, such as the large number of bolts on the frame side plate and low installation efficiency, this invention proposes a bolt installation and adjustment device for marine diesel engine frame side plates. The device includes a vertically arranged steel pipe (1) for inserting the bolt (4) to be installed, and a support structure on the outer wall of the steel pipe (1) for adjusting the perpendicularity between the bolt (4) to be installed and the frame side plate (5) to which the bolt (4) is installed. The lower end face of the steel pipe (1) is parallel to and does not contact the connection surface between the frame side plate (5) and the bolt (4) to be installed. The bottom surface of the support structure is in contact with and coplanar with the connection surface between the frame side plate (5) and the bolt (4) to be installed. The distance from the lower end face of the steel pipe (1) to the upper surface of the frame side plate (5) is greater than the distance from the bottom surface of the support plate (2) to the upper surface of the frame side plate (5).

[0005] According to the above-described marine diesel engine frame side plate bolt installation and adjustment device, the support structure includes 3-4 support plates (2) evenly fixed on the outer side wall of the steel pipe (1); the shape of the support plate (2) is a right triangle or a quadrilateral.

[0006] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the inner diameter of the steel pipe (1) is 1.1-1.2 times the diameter of the bolt (4) to be installed.

[0007] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the thickness of the support plate (2) is 1.2-1.5 times the side wall thickness of the steel pipe (1).

[0008] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the perpendicularity of the plane formed by the coplanarity of the axis of the steel pipe (1) and the bottom surface of the support plate (2) is less than 0.1mm.

[0009] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the parallelism of the plane formed by the bottom surface of the support plate (2) is less than 0.1mm.

[0010] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the bottom surface of the support plate (2) is provided with anti-slip texture.

[0011] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the distance from the lower end face of the steel pipe (1) to the upper surface of the frame side plate (2) is 1mm-20mm larger than the distance from the support plate (2) to the upper surface of the frame side plate (200).

[0012] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the inner wall of the steel pipe (1) is coated with a layer of lubricating oil.

[0013] According to the above-described marine diesel engine frame side plate bolt installation adjustment device, the outer wall of the steel pipe (1) and the support plate (2) are connected by full welding process.

[0014] The beneficial effects of the present invention are as follows:

[0015] This invention designs a simple and adaptable adjustment device that uses a combination of steel pipe and support plate to achieve automatic vertical positioning of bolts without repeated measurements. This effectively solves the technical bottlenecks of low efficiency and unstable accuracy in traditional methods, and is especially suitable for mass installation of small cylindrical bolts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the bolt installation and adjustment device for the side plate of the marine diesel engine frame according to the present invention.

[0017] Figure 2 This is a schematic diagram illustrating the method of using the bolt installation and adjustment device for the side plate of the marine diesel engine frame according to the present invention.

[0018] In the diagram: 1-steel pipe, 2-support plate, 3-installation and adjustment device, 4-with mounting bolts, 5-side plate. Detailed Implementation

[0019] Preferred Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] like Figure 1 , Figure 2 As shown: In this embodiment, the marine diesel engine frame side plate bolt installation and adjustment device includes a vertically arranged steel pipe 1 for inserting the bolt 4 to be installed, and a support structure set on the outer wall of the steel pipe 1 for adjusting the perpendicularity between the bolt 4 to be installed and the frame side plate 5 to which the bolt 4 is installed; the lower end face of the steel pipe 1 is not in contact with the connection surface of the frame side plate 5 and the bolt 4 to be installed and is parallel; the bottom surface of the support structure is in contact with the connection surface of the frame side plate 5 and the bolt 4 to be installed and is coplanar; the distance from the lower end face of the steel pipe 1 to the upper surface of the frame side plate 5 is greater than the distance from the bottom surface of the support plate 2 to the upper surface of the frame side plate 5.

[0022] The supporting structure includes 3-4 support plates 2 evenly fixed on the outer wall of the steel pipe 1; the support plates 2 are right-angled triangles or quadrilaterals. The inner diameter of the steel pipe 1 is 1.1-1.2 times the diameter of the bolts 4 to be installed. The thickness of the support plate 2 is 1.2-1.5 times the thickness of the side wall of the steel pipe 1. The perpendicularity of the plane formed by the coplanarity of the axis of the steel pipe 1 and the bottom surface of the support plate 2 is less than 0.1 mm.

[0023] The parallelism of the plane formed by the coplanar bottom surfaces of support plate 2 is less than 0.1 mm. The bottom surface of support plate 2 is provided with anti-slip texture. The distance from the lower end face of steel pipe 1 to the upper surface of frame side plate 2 is 1 mm to 20 mm greater than the distance from support plate 2 to the upper surface of frame side plate 200. The inner wall of steel pipe 1 is coated with a lubricating oil layer. The outer wall of steel pipe 1 is connected to support plate 2 using a full welding process.

[0024] The bolt installation and adjustment device for the marine diesel engine frame side plate in this embodiment consists of a steel pipe 1 and three support plates 2. The steel pipe 1 is a seamless carbon steel pipe with an inner diameter 0.5-1mm larger than the diameter of the bolt 4 to be installed. In this embodiment, when installing M16 bolts, the inner diameter of the steel pipe 1 is 16.5mm, and the length of the steel pipe 1 is 50mm. The support plates 2 are triangular steel plates with a length × width × thickness of 30mm × 15mm × 5mm. They are welded evenly at 120° intervals along the outer circumference of the steel pipe 1. After welding, they are ground to ensure that the flatness error of the bottom surface of the support plate 1 is ≤0.1mm. The distance from the lower end face of the steel pipe 1 to the upper surface of the frame side plate 5 is 2mm larger than the distance from the bottom surface of the support plate 2 to the upper surface of the frame side plate 5, forming a positioning gap to facilitate contact between one end face of the bolt 4 to be installed and the frame side plate 5.

[0025] Installation steps:

[0026] First, prepare for positioning: mark the installation positions of the bolts 4 to be installed on the surface of the side plate 5 of the frame according to the drawings, and clean the welding area;

[0027] Next, place the installation and adjustment device 3 at the marked point, and attach the bottom surface of the support plate 2 to the side plate 5 of the frame;

[0028] Next, insert the bolt 4 to be installed: insert one end of the bolt 4 to be installed into the steel pipe 1 until the end face of the bolt 4 to be installed contacts the side plate 5 of the frame;

[0029] Then, perform tack welding: Perform three-point tack welding at the contact point between the bolt 4 to be installed and the side plate 5 of the frame, with each weld length ≤3mm;

[0030] Finally, install the adjustment device 3: gently tap the installation adjustment device 3 to loosen it from the bolt 4 to be installed, and complete the final full welding.

[0031] In this embodiment: a 15° chamfer is machined at the top of the steel pipe 1 for guidance, which facilitates the quick insertion of the bolt 4; a cross grid pattern is laser-engraved on the bottom surface of the support plate 2 to enhance the friction with the side plate 5 of the frame; both the steel pipe 1 and the support plate 2 are galvanized to improve corrosion resistance.

[0032] When using this invention for installation, the perpendicularity of the support plate 2 and the steel pipe 1 must be checked before welding and calibrated regularly; after the positioning welding, it must be visually confirmed that the bolts 4 to be installed are not offset before the installation adjustment device 3 can be removed; when storing the installation adjustment device 3, collisions should be avoided to prevent structural deformation.

[0033] In the installation of diesel engine frame side plates in shipyards, the installation time for a single bolt was reduced from 5 minutes using the traditional method to 1.5 minutes after using this device, and the verticality qualification rate increased from 87% to 99.6%. The device can be reused more than 200 times, is compatible with M12 to M24 bolts, and significantly reduces the frequency of tool replacement.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A marine diesel engine bed side plate bolting alignment device, characterized by, The application relates to a vertical steel pipe (1) for inserting a bolt (4) to be installed, a support structure arranged on the outer wall of the steel pipe (1) for adjusting the verticality between the bolt (4) to be installed and a rack side plate (5) to which the bolt (4) is installed; the lower end surface of the steel pipe (1) is not in contact with and parallel to the connecting surface of the rack side plate (5) and the bolt (4) to be installed; the bottom surface of the support structure is in contact with and coplanar with the connecting surface of the rack side plate (5) and the bolt (4) to be installed; and the distance from the lower end surface of the steel pipe (1) to the upper surface of the rack side plate (5) is greater than the distance from the bottom surface of the support plate (2) to the upper surface of the rack side plate (5).

2. Marine diesel engine bed side plate bolting alignment device according to claim 1, characterized in that, The support structure comprises 3-4 support plates (2) uniformly fixed on the outer wall of the steel pipe (1); the support plates (2) are in the shape of right-angled triangles or quadrilaterals.

3. Marine diesel engine bed side plate bolting alignment device according to claim 2, characterized in that The inner diameter of the steel pipe (1) is 1.1-1.2 times the diameter of the bolt (4) to be installed.

4. The marine diesel engine bed side plate bolting alignment device according to claim 3, characterized in that, The thickness of the support plate (2) is 1.2-1.5 times the thickness of the side wall of the steel pipe (1).

5. Marine diesel engine bed side plate bolting alignment device according to claim 4, characterized in that The verticality of the plane formed by the axis of the steel pipe (1) and the bottom surface of the support plate (2) is less than 0.1 mm.

6. A marine diesel engine bed side plate bolting alignment device according to claim 5, characterised in that, The parallelism of the plane formed by the bottom surfaces of the support plates (2) is less than 0.1 mm.

7. A marine diesel engine bed side plate bolting alignment device according to claim 6, characterised in that, The bottom surface of the support plate (2) is provided with anti-skid lines.

8. The marine diesel engine bed side plate bolting alignment device according to claim 7, characterized in that, The distance from the lower end surface of the steel pipe (1) to the upper surface of the rack side plate (5) is 1-20 mm greater than the distance from the support plate (2) to the upper surface of the rack side plate (5).

9. Marine diesel engine bed side plate bolting alignment device according to claim 1 or 8, characterized in that, The inner wall of the steel pipe (1) is coated with a lubricating oil layer.

10. The marine diesel engine bed side plate bolting alignment device according to claim 9, characterized in that, The outer wall of the steel pipe (1) and the support plate (2) are connected by full welding.

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