Pre-assembly structure before shipping of marine low-speed diesel engine

Abstract

The pre-assembly structure comprises a machine base, a machine frame is arranged above the machine base, the pre-assembly structure further comprises a plurality of supporting seats, each supporting seat comprises a supporting barrel with the top open, the supporting barrels fall into corresponding fixing holes in the bottom of the machine frame, and supporting pieces are arranged on the outer barrel faces of the supporting barrels. The supporting piece is in contact with the upper surface of the bottom of the machine frame, the machine frame supports the supporting barrel through the supporting piece, after the penetrating bolt penetrates through the fixing hole in the upper portion of the machine frame, the bottom of the penetrating bolt is inserted into the supporting barrel, the supporting barrel is used for supporting, time and labor are saved when the pre-assembly structure is transported in a split mode, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engines, in particular to a pre-shipment pre-assembly structure of a low-speed marine diesel engine. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] After the production of marine low-speed diesel engines (output speed less than 150r / min) is completed, they need to be pre-assembled in the workshop before shipment, forming a pre-assembled overall structure before shipment. The overall structure includes a base at the bottom, a frame is arranged above the bottom base, and through bolts pass through the upper fixing holes and the bottom fixing holes of the frame. After the through bolts pass through the fixing holes, they are threadedly connected with the threaded holes arranged on the top surface of the base. When the diesel engine needs to be transported, due to the limitation of transportation space, the frame and the base need to be transported separately. At this time, the base and the frame need to be separated, and the frame and the machine need to be transported separately. Once the seat is separated, if the frame is lifted, there is no support under the through-bolts, so the through-bolts cannot be lifted while the frame is lifted. Therefore, the through-bolts need to be removed first. When removing the through-bolts, on the one hand, the upper bracket, floor and pipe system of the through-bolts need to be removed first, which is a lot of work. On the other hand, the through-bolts are long, and a high-power crane with a high lifting height must be used when removing them. The lifting path is long and the energy consumption is high. Thirdly, the through-bolts must be removed on the test bench, which occupies the resources of the test bench. Finally, the through-bolts are removed and packed separately for shipment, which increases the transportation cost. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a pre-shipment pre-assembly structure for a marine low-speed diesel engine. When the frame and the base are separated before shipment, there is no need to remove the through bolts in advance, thus overcoming the defects existing in removing the through bolts.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An embodiment of the utility model provides a pre-shipment pre-assembly structure for a marine low-speed diesel engine, comprising an engine base, a frame arranged above the engine base, and a plurality of support seats, wherein the support seat comprises a support cylinder arranged with an open top, the support cylinder falls into a corresponding fixing hole at the bottom of the frame, a support member is arranged on the outer cylinder surface of the support cylinder, the support member contacts the upper surface of the bottom of the frame, the frame supports the support cylinder through the support member, and after the through bolt passes through the fixing hole on the upper part of the frame, the bottom of the through bolt is inserted into the support cylinder and supported by the support cylinder.

[0007] Optionally, the outer diameter of the support tube is not greater than the diameter of the bottom fixing hole of the frame.

[0008] Optionally, the inner diameter of the support tube is larger than the outer diameter of the bottom end of the through bolt.

[0009] Optionally, the support member is arranged on the top of the outer cylinder surface of the support cylinder.

[0010] Optionally, the support member is a support ring fixed to the outer surface of the support tube.

[0011] Optionally, the support ring is made of an annular round steel, the inner side of the annular round steel is fixed to the outer cylinder surface of the support cylinder, and the diameter of the circumference of the outer side is larger than the diameter of the fixing hole at the bottom of the frame.

[0012] Optionally, the support member is a plurality of support segments fixed on the outer surface of the support tube and arranged at intervals.

[0013] Optionally, the support section is made of arc-shaped round steel, which is arranged along the top edge of the sleeve, and the diameter of the circumference of the outer sides of the multiple round steels is larger than the diameter of the bottom fixing hole of the frame.

[0014] Optionally, the support section is disposed at a position away from a bottom corner weld at the bottom of the frame.

[0015] Optionally, two support segments are provided, and the two support segments are arranged 180° apart along the top edge of the sleeve.

[0016] The beneficial effects of the above utility model are as follows:

[0017] The utility model discloses a pre-shipment pre-assembly structure for a marine low-speed diesel engine, in which a support tube is arranged at a fixing hole at the bottom of the frame, and the support tube is supported by a support member on the upper surface of the bottom of the frame, and the bottom of the through-bolt is inserted into the support tube. When shipment is required and the base and the frame are separated, the through-bolt can be supported by the support tube, so that the through-bolt can be transported together with the random frame. Therefore, there is no need to remove all the through-bolts, and the steps of removing the upper bracket, floor and pipe system of the through-bolts are omitted, and there is no need to use a high-power crane to lift out all the through-bolts, which reduces energy consumption and avoids occupying test bench resources when removing the through-bolts. The split shipment of the diesel engine is faster and more convenient, which saves time and effort. At the same time, the through-bolts can be transported together with the random frame, and there is no need to pack and ship them separately, thus saving transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0020] Figure 2 This is a schematic diagram of the support base structure of Embodiment 1 of the utility model;

[0021] Figure 3 This is a schematic diagram of the cooperation between the support base and the bottom fixing hole of the frame in Example 1 of the utility model;

[0022] Among them, 1. machine base, 2. frame, 3. bottom fixing holes, 4. through bolts, 5. support base, 6. crane; 5-1. support tube, 5-2. support section. DETAILED DESCRIPTION

[0023] Example 1

[0024] This embodiment provides a pre-shipment pre-assembled structure for a low-speed marine diesel engine, such as Figure 1 As shown, it includes a base 1, a frame 2 is arranged above the base 1, the frame 2 is provided with multiple upper fixing holes and multiple bottom fixing holes 3, and the top surface of the base 1 is provided with threaded holes matching the bottom fixing holes 3. The structure of the above base 1 and the frame 2 can adopt the existing technology and will not be described in further detail here.

[0025] The machine base 1 and the frame 2 are connected together by the threaded holes, and the through bolts 4 are connected together by the threaded holes.

[0026] like Figure 2-Figure 3 As shown, the support seat 5 includes a support tube 5-1, which is a cylindrical tube with an open top. The outer diameter of the support tube 5-1 is not larger than the diameter of the bottom fixing hole of the frame, so that the support tube 5-1 can be placed in the bottom fixing hole. The outer tube surface of the support tube 5-1 is provided with a support member, which contacts the upper surface of the plate at the bottom of the frame 2. The bottom of the frame 2 can support the support tube 5-1 through the support member.

[0027] Furthermore, the support member is fixed at the top position of the outer cylinder surface of the support cylinder, so that the support cylinder 5-1 can sink into the bottom fixing hole 3 of the frame 2. The bottom fixing hole 3 plays a limiting role, ensuring the stability of the support cylinder 5-1 and the bottom of the frame 2.

[0028] In one embodiment, the support member adopts a support ring, which is made of annular round steel. The inner side of the support ring is welded and fixed to the top of the outer cylinder surface of the support tube 5-1. The diameter of the circumference of the outer side of the support ring is larger than the diameter of the bottom fixing hole 3. Therefore, the support ring can contact the upper surface of the plate at the bottom of the frame 2, thereby achieving support for the support tube 5-1. However, in this way, the support ring will contact the bottom corner weld at the bottom of the frame 2, affecting the stability of the placement of the support tube 5-1 and easily causing certain damage to the weld.

[0029] Therefore, in this embodiment, the support member is composed of a plurality of support segments 5-2 arranged at intervals on the top of the outer cylinder surface of the support cylinder 5-1. The support segments 5-2 are made of arc-shaped round steel. The inner side of the round steel is welded and fixed to the top of the outer cylinder surface of the support cylinder 5-1. The diameter of the circle where the outer sides of the plurality of round steels are located is larger than the diameter of the bottom fixing hole 3 of the frame 2. The round steel can contact the upper surface of the plate at the bottom of the frame, thereby achieving support for the support cylinder 5-1.

[0030] The support segment 5-2 is positioned away from the bottom corner weld at the bottom of the frame. Preferably, two support segments 5-2 are provided, and the two support segments are provided 180° apart.

[0031] In another embodiment, the support section 5-2 may also adopt a support plate, which contacts the upper surface of the plate at the bottom of the frame 2 to support the support tube 5-1. Those skilled in the art may set it according to actual needs, which is not described in detail here.

[0032] The inner diameter of the support tube 5 - 1 is larger than the outer diameter of the bottom of the through bolt 4 , so that the bottom of the through bolt 4 can be inserted into the support tube 5 - 1 .

[0033] After the through bolt 4 passes through the upper fixing hole of the frame 2, its bottom end is inserted into the support tube 5-1, and its bottom end face contacts the upper surface of the bottom tube wall of the support tube 5-1, so that the support tube 5-1 can support the through bolt 4. At the same time, the through bolt 4 is positioned through the side tube wall of the support tube 5-1 to prevent the through bolt 4 from shaking.

[0034] The preassembled structure of this embodiment, when it is necessary to ship, after the base 1 and the frame 2 are separated, the through bolt 4 can be supported by the support tube 5-1, so that the through bolt 4 can be transported together with the random frame 2. Therefore, there is no need to remove all the through bolts 4 before the frame 2 and the base 1 are separated, and the steps of removing the upper bracket, floor, and pipe system of the through bolt 4 are omitted, which saves time and effort. There is no need to use a high-power crane to lift out all the through bolts 4, which reduces energy consumption and avoids occupying test bench resources when removing the through bolts 4. The split shipment of the diesel engine is faster and more convenient, saving time and effort and improving work efficiency. At the same time, the through bolt 4 can be transported together with the random frame 2, and there is no need to pack and ship it separately, which saves transportation costs and solves the problem that the through bolt 4 must be separated from the diesel engine oil before it can be transported.

[0035] The assembling method of the pre-assembled structure of this embodiment comprises the following steps:

[0036] Unscrew the through bolt 4 from the threaded hole of the base 1;

[0037] The through bolt 4 is hoisted by a crane 6 until the bottom end of the through bolt 4 is about 200 mm higher than the bottom fixing hole 3 of the frame 2 .

[0038] Place the support tube 5-1 at the bottom fixing hole 3, rotate the support tube 5-1 so that the support section 5-2 avoids the bottom corner weld of the frame, and then place the support section 5-2 on the bottom upper surface of the frame 2, and use the frame 2 to support the support tube 5-1.

[0039] The crane 6 is lowered to slowly insert the bottom end of the through bolt 4 into the support tube 5 - 1 , and the through bolt 4 is supported by the support tube 5 - 1 .

[0040] The through bolt 4 is disengaged from the crane 6 .

[0041] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A pre-shipment pre-assembled structure for a low-speed marine diesel engine, comprising a base, a frame is arranged above the base, and is characterized in that: It also includes multiple support seats, which include a support tube with an open top, which falls into a corresponding fixing hole at the bottom of the frame, and a support member is provided on the outer tube surface of the support tube, which contacts the upper surface of the bottom of the frame, and the frame supports the support tube through the support member. After the through bolt passes through the fixing hole on the upper part of the frame, the bottom of the through bolt is inserted into the support tube and supported by the support tube.

2. A pre-shipment pre-assembled structure for a low-speed marine diesel engine as claimed in claim 1, characterized in that: The outer diameter of the support tube is not greater than the diameter of the bottom fixing hole of the frame.

3. A pre-shipment pre-assembled structure for a low-speed marine diesel engine as claimed in claim 1, characterized in that: The inner diameter of the support tube is larger than the outer diameter of the bottom end of the through bolt.

4. A pre-shipment pre-assembly structure for a low-speed marine diesel engine as claimed in claim 1, characterized in that: The support member is arranged on the top of the outer cylinder surface of the support cylinder.

5. The pre-shipment pre-assembled structure of a low-speed marine diesel engine according to claim 1, characterized in that: The support member adopts a support ring fixed on the outer cylinder surface of the support cylinder.

6. A pre-shipment pre-assembled structure for a low-speed marine diesel engine as claimed in claim 5, characterized in that: The support ring is made of annular round steel, the inner side of which is fixed to the outer cylinder surface of the support cylinder, and the diameter of the circumference of the outer side is larger than the diameter of the fixing hole at the bottom of the frame.

7. A pre-shipment pre-assembled structure for a low-speed marine diesel engine as claimed in claim 1, characterized in that: The support member adopts a plurality of support segments fixed on the outer surface of the support tube and arranged at intervals.

8. A pre-shipment pre-assembled structure for a low-speed marine diesel engine as claimed in claim 7, characterized in that: The support section is made of arc-shaped round steel, which is arranged along the top edge of the sleeve, and the diameter of the circumference of the outer sides of the plurality of round steels is greater than the diameter of the bottom fixing hole of the frame.

9. A pre-shipment pre-assembled structure for a low-speed marine diesel engine as claimed in claim 7, characterized in that: The support section is arranged at a position away from the bottom corner weld at the bottom of the frame.

10. A pre-shipment pre-assembled structure for a low-speed marine diesel engine as claimed in claim 9, characterized in that: Two support sections are provided, and the two support sections are arranged at an interval of 180° along the top edge of the sleeve.

Images