Moisture-proof low-temperature fresh water marine expansion tank

Abstract

The utility model discloses a moistureproof low temperature fresh water ship expansion water tank, including water tank body and integrated moistureproof heat preservation layer, water tank body is hollow cavity, is equipped with water inlet in top portion, is equipped with water outlet in bottom portion, is equipped with drain valve in lower portion of lateral wall, integrated moistureproof heat preservation layer is wrapped in water tank body outside, and from inside to outside is moistureproof layer, positioning layer and heat preservation layer in proper order, positioning layer is the modified epoxy resin layer of ring convex point, and ring convex point is embedded in heat preservation layer, and moistureproof layer is connected through low temperature solidification adhesive layer between water tank body. The utility model realizes moistureproof antirust and low temperature heat preservation double function, and promotes the stability and equipment life of ship fresh water system.

Description

Technical Field

[0001] This utility model relates to the technical field of marine freshwater storage equipment, specifically to a marine expansion tank that is suitable for low-temperature environments and has moisture-proof function. Background Technology

[0002] Marine expansion tanks are used to store expanding water in a ship's freshwater system to balance system pressure. Existing marine expansion tanks have two main problems: First, the high humidity of the ship's navigation environment makes the tank itself susceptible to corrosion due to moisture, shortening its service life; second, in low-temperature sea areas (such as high-latitude routes), the freshwater inside the tank is easily affected by the ambient temperature and freezes, leading to tank cracking or a lack of freshwater supply. Furthermore, existing insulation structures are mostly complex double-layered designs, making installation and maintenance inconvenient.

[0003] Existing improvement solutions either simply add an insulation layer to some water tanks without addressing the moisture-proofing issue, or employ a sealed moisture-proof structure, which requires complex dehumidification devices, increasing manufacturing costs and the risk of failure. Therefore, there is an urgent need for a marine expansion tank that combines moisture-proofing and low-temperature icing prevention with a simple structure. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a moisture-proof low-temperature freshwater marine expansion tank that achieves dual functions of moisture-proof and rust-proof as well as low-temperature insulation, thereby improving the stability of the ship's freshwater system and the service life of the equipment.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a moisture-proof low-temperature freshwater marine expansion tank, comprising a tank body and an integrated moisture-proof and heat-insulating layer;

[0006] The water tank body is a hollow cavity with a water inlet at the top, a water outlet at the bottom, and a drain valve at the lower part of the side wall.

[0007] The integrated moisture-proof and heat-insulating layer is attached to the outside of the water tank body. From the inside to the outside, it consists of a moisture-proof layer, a positioning layer, and a heat-insulating layer. The positioning layer is a modified epoxy resin layer with annular protrusions. The annular protrusions are embedded in the heat-insulating layer, and the moisture-proof layer is connected to the water tank body by a low-temperature curing adhesive layer.

[0008] Furthermore, the inner wall of the water tank body is provided with a 0.2-0.3mm thick polytetrafluoroethylene anti-stick coating.

[0009] Furthermore, it also includes a linkage pressure regulating assembly, which includes a base mounting base, a pressure valve, a linkage lever, an air supply interface, and a snap-fit ​​drying filter element; the base mounting base is used to fix it to the top of the water tank body; the base mounting base has vent holes and air supply holes that are arranged side by side and perpendicularly through it; the pressure valve has a spring structure and is snapped into the vent hole; the bottom of the pressure valve has a spring seat; the spring seat can move up and down along the axial direction of the vent hole as the pressure in the water tank changes;

[0010] The linkage lever is rotatably connected to the base mounting seat via a pivot pin. One end of the linkage lever rests on the spring seat, and the other end is fixed with a sealing plug. The sealing plug can be adapted and fitted to the inner inlet of the air inlet. The air inlet has a straight-through structure, which is inserted into and sealed to the air inlet. The inner side of the air inlet has an annular groove. The snap-fit ​​dryer filter element is snapped into the annular groove and is used to dry the air entering the water tank. The snap-fit ​​dryer filter element can be removed and replaced from the outside of the air inlet.

[0011] When the pressure inside the water tank exceeds the preset venting threshold, the spring seat moves upward and lifts one end of the linkage lever. The linkage lever rotates around the pivot pin, causing the sealing plug to press downward against the air inlet to seal the air supply channel. At the same time, the pressure valve opens to vent. When the pressure inside the water tank is less than the preset air supply threshold, the spring seat returns to its original position. After the linkage lever loses its pushing force, the end with the sealing plug lifts upward to open the air supply channel. Outside air enters the water tank after being dried by the snap-fit ​​dryer filter.

[0012] Furthermore, the top of the water tank body is also provided with an inspection port, the inspection port is 300mm×300mm in size, and is equipped with an inspection cover with an observation window.

[0013] The beneficial effects of this utility model are as follows:

[0014] This utility model features an integrated moisture-proof and heat-insulating layer. The moisture-proof layer, positioning layer, and heat-insulating layer work together from the inside out to block external humid air and reduce heat loss from the fresh water inside the tank. The annular protrusion design of the positioning layer enhances the connection stability with the heat-insulating layer. The low-temperature curing adhesive layer ensures that the moisture-proof layer adheres tightly to the tank body in low-temperature environments, effectively solving the problems of poor heat insulation and easy corrosion of traditional water tanks.

[0015] The linkage pressure regulating component achieves linkage control between the pressure valve and the air replenishment interface through the linkage sealing plate. When venting, the air replenishment interface is closed, and when replenishing, the air is dried by the drying filter element to prevent humid air from entering the water tank and contaminating the fresh water, thus ensuring the quality of the fresh water.

[0016] The polytetrafluoroethylene (PTFE) non-stick coating on the inner wall of the water tank prevents scaling and facilitates cleaning. The inspection port on the top and the inspection cover with an observation window make it convenient for staff to observe and repair, reducing the difficulty of maintenance. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of a moisture-proof and heat-insulating layer.

[0020] Figure 3 This is a schematic diagram of the structure of Example 2. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0022] Example 1

[0023] refer to Figure 1 and Figure 2 This utility model provides a moisture-proof low-temperature freshwater marine expansion tank, comprising a tank body 1 and an integrated moisture-proof and heat-insulating layer 2.

[0024] The water tank body is made of 304 stainless steel and has a hollow cylindrical structure with an inner diameter of 800mm and a height of 1200mm. A DN50 water inlet 11 is welded to the top, a DN80 water outlet 12 is welded to the bottom, and a DN25 drain valve 13 is welded to the lower part of the side wall.

[0025] The integrated moisture-proof and heat-insulating layer 2 is attached to the outside of the water tank body, and consists of a moisture-proof layer 21, a positioning layer 22 and a heat-insulating layer 23 from the inside to the outside.

[0026] The positioning layer 21 is a 2mm thick modified epoxy resin layer with annular protrusions 24. The annular protrusions 24 are 5mm in diameter and 3mm in height, and are set every 50mm along the circumference of the water tank body. The insulation layer 23 is a 50mm thick polyurethane foam insulation layer. The annular protrusions 24 are embedded in the polyurethane foam insulation layer, forming positioning grooves that match the annular protrusions 24. The moisture-proof layer 21 is connected to the water tank body 1 and the positioning layer by a low-temperature curing adhesive layer. The low-temperature curing adhesive layer is an epoxy-based low-temperature curing adhesive with a curing temperature range of -10℃ to 5℃.

[0027] The inner wall of the water tank is coated with a 0.25mm thick polytetrafluoroethylene anti-stick coating, which is then cured at 280℃.

[0028] A 300mm×300mm square inspection port 3 is opened on the top of the water tank body. The inspection cover is made of stainless steel and has an 8mm thick tempered glass observation window in the middle. The inspection cover and the inspection port are sealed with a rubber sealing ring and fixed with 4 wing bolts.

[0029] The moisture-proof low-temperature freshwater expansion tank of this embodiment can maintain a freshwater temperature drop of no more than 3°C within 24 hours in a low-temperature environment of -5°C, and there is no condensation on the surface of the moisture-proof layer. After 6 months of use, there is no obvious scale buildup on the inner wall of the tank. The inside of the tank can be inspected and cleaned by opening the inspection cover, thus meeting the usage requirements of the ship's low-temperature freshwater system.

[0030] Example 2

[0031] Based on Embodiment 1, this embodiment also includes a linkage pressure regulating component, which is installed on the top of the water tank body. The linkage pressure regulating component includes a base mounting seat 41, a pressure valve 42, a linkage lever 43, an air supply port 44, and a drying filter element 45.

[0032] The base mounting base 41 is used to fix it to the top of the water tank body, and the water tank body has a pre-set mounting hole; the base mounting base 41 has a vent hole and a replenishment hole that are arranged side by side and vertically through it; the pressure valve 42 is a spring-type structure and is snapped into the vent hole; the bottom of the pressure valve 42 is provided with a spring seat 46, which is connected to the compression spring inside the pressure valve 42; the spring seat 46 (including a moving plate and a connecting spring) can move up and down along the axial direction of the vent hole as the pressure inside the water tank changes.

[0033] The linkage lever 43 is rotatably connected to the base mounting seat 41 via a shaft pin. One end of the linkage lever 43 rests on the spring seat (hinged), and the other end is fixed with a sealing plug 47. The sealing plug 47 can be adapted and fitted to the inner inlet of the air replenishment hole. The air replenishment interface has a straight-through structure, which is inserted into and sealed in the air replenishment hole. The inner side of the air replenishment interface is provided with an annular groove. The snap-fit ​​dryer filter element 45 is snapped into the annular groove and is used to dry the air entering the water tank. The snap-fit ​​dryer filter element can be removed and replaced from the outside of the air replenishment interface.

[0034] When the pressure inside the water tank exceeds the preset venting threshold, the spring seat moves upward and lifts one end of the linkage lever. The linkage lever rotates around the pivot pin, causing the sealing plug to press downward against the air inlet to seal the air supply channel. At the same time, the pressure valve opens to vent. When the pressure inside the water tank is less than the preset air supply threshold, the spring seat returns to its original position. After the linkage lever loses its pushing force, the end with the sealing plug lifts upward to open the air supply channel. Outside air enters the water tank after being dried by the snap-fit ​​dryer filter.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present utility model's technical solution.

Claims

1. A moisture-proof, low-temperature freshwater marine expansion tank, characterized in that: Includes the water tank body and an integrated moisture-proof and heat-insulating layer; The water tank body is a hollow cavity with a water inlet at the top, a water outlet at the bottom, and a drain valve at the lower part of the side wall. The integrated moisture-proof and heat-insulating layer is attached to the outside of the water tank body, and consists of a moisture-proof layer, a positioning layer and a heat-insulating layer from the inside to the outside. The positioning layer is a modified epoxy resin layer with annular protrusions. The annular protrusions are embedded in the heat-insulating layer, and the moisture-proof layer is connected to the water tank body by a low-temperature curing adhesive layer.

2. The moisture-proof low-temperature freshwater marine expansion tank according to claim 1, characterized in that: The inner wall of the water tank body is provided with a 0.2-0.3mm thick polytetrafluoroethylene anti-stick coating.

3. The moisture-proof low-temperature freshwater marine expansion tank according to claim 1, characterized in that: It also includes a linkage pressure regulating component; the linkage pressure regulating component includes a base mounting base, a pressure valve, a linkage lever, an air supply interface, and a snap-fit ​​drying filter element; the base mounting base is used to fix it to the top of the water tank body; the base mounting base has vent holes and air supply holes that are arranged side by side and perpendicularly through it; the pressure valve has a spring structure and is snapped into the vent hole; the bottom of the pressure valve has a spring seat; the spring seat can move up and down along the axial direction of the vent hole as the pressure in the water tank changes; The linkage lever is rotatably connected to the base mounting seat via a pivot pin; one end of the linkage lever rests on the spring seat, and the other end is fixed with a sealing plug, which can be adapted and fitted to the inner inlet of the air inlet. The air supply interface has a straight-through structure, which is inserted into and sealed within the air supply hole, and a drying filter element is provided on the inner side of the air supply interface.

4. The moisture-proof low-temperature freshwater marine expansion tank according to claim 1, characterized in that: The water tank body is also equipped with an inspection port on the top, which is 300mm×300mm in size and has a matching inspection cover with an observation window.

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