B30 welding type end cover suitable for marine shell-and-tube condenser

Abstract

The utility model relates to a B30 welding type end cover suitable for a marine shell-and-tube condenser, which comprises a left end cover and a right end cover, and both the left end cover and the right end cover adopt B30 plates to form a left cover body and a right cover body through cutting, folding, splicing and welding; a pipe connecting flange and an anti-corrosion block assembly are arranged on the left cover body, a rib plate is arranged in the left cover body, baffles are arranged on the two sides, and a square flange is welded to the bottom; the right cover body is welded with an anti-corrosion block assembly and a welding seat, a rib plate is arranged in the right cover body, baffles are arranged on two sides, and a square flange is welded at the bottom. The end cover is formed by cutting, folding, splicing and welding the B30 plate, the production process is simpler than that of a cast end cover, the production time is shortened, and the rejection rate is reduced. When the anti-corrosion block is replaced, a water drain valve of the shell-and-tube condenser can be opened firstly to drain all seawater, the anti-corrosion block is replaced under the condition that the end cover is not disassembled, and maintenance operation is convenient. A mechanical structure is adopted for sealing, the end cover can be stably used for a long time, and the reliability and the service life of the end cover are improved.

Description

Technical Field

[0001] The utility model relates to an end cover structure of a marine shell and tube condenser, in particular to a welded end cover suitable for the marine shell and tube condenser. Background Art

[0002] Shell-and-tube condensers are widely used in marine air conditioners, chillers, and refrigeration units, and are essential components of marine equipment. The tube-side fluid in shell-and-tube condensers is typically seawater, while the shell-side fluid is typically air or refrigerant. Currently, for shell-and-tube heat exchangers with seawater as the tube-side fluid, the end covers are mostly cast integrally from aluminum bronze (ZCuA19Mn2), and their structural design, production process, and assembly are relatively mature. After casting, the end covers are cleaned of scale, sand inclusions, scars, and burrs to ensure a clean, smooth surface. The unmachined surface of the end cover casting should be free of cracks, cold shuts, or pinholes that could affect strength, performance, and lifespan. It should also be free of deformation and damage, and should not be repaired by welding. After machining, the end covers must undergo a water pressure strength test, with a holding time of at least 30 minutes, and should be leak-free.

[0003] On board ships, the actual working environment of shell and tube condensers is characterized by long-term pitch, long-term roll, pitch, roll, salt spray, impact, and vibration, and seawater itself is corrosive to a certain extent. Shell and tube condensers use end covers cast from aluminum bronze (ZCuA19Mn2). Due to the possibility of cracks, cold shuts, sand holes, and other problems, a large number of end covers are unqualified during the production process. If the finished end cover contains some very small cracks or sand holes, in the actual ship working environment, the seawater will constantly vibrate and impact the end cover, which will reduce the service life of the cast end cover. If the cast end cover is used for more than 5 years, small cracks or sand holes may evolve into large cracks and sand holes, causing the end cover to leak and be scrapped. At present, there have been cases of water leakage in the end covers of marine shell and tube condensers. Therefore, under normal circumstances, the relevant support bases will use the end covers as spare parts.

[0004] In summary, considering the end cover processing and production technology, harsh marine conditions, anti-corrosion and leak prevention, maintenance space and service life requirements, it is necessary to develop a B30 welded end cover suitable for marine shell and tube condensers. Summary of the Invention

[0005] Aiming at the actual marine working environment, corrosion and leakage prevention, maintenance space and service life requirements, the utility model proposes a B30 welded end cover suitable for marine shell and tube condensers, which aims to shorten the end cover production time, reduce the end cover scrap rate, and improve the reliability and service life of the end cover.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a B30 welded end cover suitable for a marine shell and tube condenser, comprising a left end cover and a right end cover, both of which are made of B30 plates that are cut, folded, assembled and welded to form a left cover body and a right cover body; the left cover body is provided with a connecting flange and an anti-corrosion block assembly, a rib plate is provided inside, baffles are provided on both sides, and a square flange is welded on the bottom; the right cover body is welded with an anti-corrosion block assembly and a welding seat, a rib plate is provided inside, baffles are provided on both sides, and a square flange is welded on the bottom.

[0007] Furthermore, the square flange is cut from a whole piece of B30 plate.

[0008] Furthermore, the ribs are cut from B30 plates and welded to the inner side of the cover to form a compartment.

[0009] Furthermore, the baffle is cut from B30 plate and welded to both sides of the cover.

[0010] Furthermore, grooves are left on the inner side of the flange for welding with the cover body, rib plate and baffle.

[0011] The beneficial effects of the utility model are:

[0012] The utility model proposes a B30 welded end cover suitable for marine shell and tube condensers, which has the following advantages:

[0013] (1) The end cover is made of B30 plate for cutting, folding, assembly and welding. The production process is simpler than that of cast end covers, the production time is shortened and the scrap rate is reduced.

[0014] (2) After long-term use, if the B30 welded end cover has local leakage, it can be disassembled and repaired by welding. The operation is simple, the maintenance time is short, and the end cover can be reused.

[0015] (3) When replacing the anti-corrosion block, you can first open the drain valve of the shell and tube condenser to drain the seawater, and then replace the anti-corrosion block without removing the end cover, which makes maintenance and operation convenient.

[0016] (4) With the mechanical structure seal, the B30 welded end cover can be used stably for a long time, which improves the reliability and service life of the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the left end cover of the B30 welded end cover suitable for marine shell and tube condensers of the present invention;

[0018] Figure 2 This is a schematic structural diagram of the right end cover of the B30 welded end cover suitable for marine shell and tube condensers of the present invention;

[0019] Figure 1Middle: 1-cover, 2-pipe flange, 3-rib plate, 4-anti-corrosion block assembly, 5-baffle, 6-method flange, 7-welding seat. DETAILED DESCRIPTION

[0020] The utility model is further described below in combination with the drawings and embodiments.

[0021] The B30 welded end cover suitable for the marine shell-and-tube condenser is divided into a left end cover and a right end cover.

[0022] The left end cover structure, as shown in Figure 1 Fig. 1, comprises a cover 1, a pipe flange 2, a rib plate 3, an anti-corrosion block assembly 4, a baffle 5, and a method flange 6. The pipe flange 2 and the anti-corrosion block assembly 4 are welded on the cover 1, the rib plate 3 is arranged inside, the baffles 5 are welded on both sides, and the method flange 6 is welded on the bottom.

[0023] The right end cover structure, as shown in Figure 2 Fig. 2, comprises a cover 1, a rib plate 3, an anti-corrosion block assembly 4, a baffle 5, a method flange 6, and a welding seat 7. The anti-corrosion block assembly 4 and the welding seat 7 are welded on the cover 1, the rib plate 3 is arranged inside, the baffles 5 are welded on both sides, and the method flange 6 is welded on the bottom.

[0024] Both the left end cover and the right end cover are made of B30, the cover is cut and folded from a B30 plate, the method flange 6 is cut from an integral B30 plate, the rib plate 3 is cut from a B30 plate and welded on the inside of the cover to form a partition, and the baffles 5 are cut from a B30 plate and welded on both sides of the cover. To ensure the sealing of the end cover, a groove for welding the cover, the rib plate, and the baffle is left on the inside of the method flange 6. Specific embodiments

[0026] The cover 1, the method flange 6, the rib plate 3, and the baffle 5 are all cut and folded from a B30 plate, and finally assembled and welded into an end cover. The partition formed by the rib plate arranged on the inside of the end cover can ensure the back-and-forth flow of seawater in the end cover, and the baffles arranged on both sides of the end cover can provide a stable space for the flow of seawater. The anti-corrosion block assembly arranged on the end cover can facilitate the replacement of the anti-corrosion blocks.

Claims

1. A B30 welded end cover suitable for marine shell and tube condensers, characterized by: It includes a left end cover and a right end cover. Both the left end cover and the right end cover are made of B30 plates through cutting, folding, assembling and welding to form a left cover body and a right cover body. The left cover body is provided with a connecting flange and an anti-corrosion block assembly, with a rib plate inside, baffles on both sides, and a square flange welded on the bottom. The right cover body is welded with an anti-corrosion block assembly and a welding seat, with a rib plate inside, baffles on both sides, and a square flange welded on the bottom.

2. The B30 welded end cover for marine shell and tube condensers according to claim 1, characterized in that: The square flange is cut from a whole piece of B30 plate.

3. The B30 welded end cover for marine shell and tube condensers according to claim 1, characterized in that: The ribs are cut from B30 plates and welded to the inner side of the cover to form a compartment.

4. The B30 welded end cover for a marine shell and tube condenser according to claim 1, characterized in that: The baffle is cut from B30 plate and welded to both sides of the cover.

5. The B30 welded end cover for marine shell and tube condensers according to claim 1, characterized in that: There are grooves on the inner side of the flange for welding with the cover, ribs and baffles.

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