A cold sea water tank

Abstract

The present invention relates to the technical field of storage of fish catches in fishing vessels, and in particular to a cold seawater tank, comprising a tank body, wherein the interior of the tank body is hollow to form a closed cavity, and the tank body is provided with a draining tank device, a suction pipe, a return pipe and a circulation pipe all of which are connected to the cavity, wherein the draining tank device is used to transport the fish catches into the cavity, the suction pipe is used to output the fish catches in the cavity, the return pipe is used to input seawater into the cavity, and the circulation pipe is used to connect with a refrigeration device and realize the circulation refrigeration of the seawater in the cavity. The fish catches are sent into the cavity of the tank body through the draining tank device, and the mixture of the fish catches and seawater in the cavity is outputted to a subsequent processing line by the suction pipe. At the same time, the cavity is supplemented with seawater by the return pipe, and the circulation pipe is connected to the refrigeration device to circulate and refrigerate the seawater in the cavity, so as to ensure that the seawater in the cavity of the tank body is sufficient and the seawater temperature is maintained to meet the requirements, thereby greatly reducing manual operations, simplifying the operation process, and being able to adapt to the continuous operation of fishing vessels.

Description

Technical Field

[0001] The invention relates to the technical field of storage of fish catches on fishing vessels, in particular to a cold sea water tank. Background Art

[0002] Cold sea water tanks are cabins that use cold sea water to pre-cool or directly preserve fish catches. They are commonly used on various types of fishing vessels for short-term caching of fish catches.

[0003] Traditional fishing boats use intermittent operations (seine / trawling or longline cranes) to capture various types of catches (fish / shrimp) in the sea. After the catch is caught on board, it will be poured into the cold seawater tank for buffering for subsequent processing. The cold seawater tanks currently used for fishing boats have relatively simple structures and functions. Usually, there is a hatch cover on the top for dumping the catch into the tank, and an outlet pipe is provided at a low position on the side for the catch to flow out of the tank by gravity. When in use, most operations are manual operations, and the operation process is complicated. In addition, according to the capture of the catch, it is necessary to repeatedly open the hatch cover, open and close the outlet pipe, clean the tank and replenish new cold seawater. This kind of cold seawater tank cannot adapt to modern operations, especially when the operation mode of the fishing boat is changed from intermittent operation to continuous pumping operation, and the subsequent processing equipment is changed from manual operation to fully automated operation, the cold seawater tank cannot adapt to the entry and exit of a large number of catches. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a cold seawater tank which can adapt to the continuous operation of fishing boats, so as to overcome the above-mentioned defects of the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: a cold seawater tank, including a tank body, the interior of the tank body is hollow to form a closed cavity, the tank body is provided with a drainage inlet device, a suction pipe, a return pipe and a circulation pipe all connected to the cavity, the drainage inlet device is used to transport the catch into the cavity, the suction pipe is used to output the catch in the cavity, the return pipe is used to input seawater into the cavity, and the circulation pipe is used to connect with the refrigeration equipment and realize the circulation refrigeration of seawater in the cavity.

[0006] Preferably, the bottom wall of the cavity is arranged to be inclined, the suction pipe is connected to the cavity at the low side of the bottom wall of the cavity, and the return pipe is connected to the cavity at the high side of the bottom wall of the cavity.

[0007] Preferably, a filter plate is provided at the bottom of the cavity, which divides the cavity into a mutually independent accommodating chamber and a filter channel. The filter channel is located below the accommodating chamber. The filter plate is provided with a first filter hole connecting the accommodating chamber and the filter channel. The drainage inlet device and the suction pipe are both connected to the accommodating chamber. The circulation pipe includes a circulating water outlet pipe connected to the filter channel and a circulating water inlet pipe connected to the accommodating chamber.

[0008] Preferably, a vertically hollow standpipe is provided in the accommodating chamber, the standpipe is provided with a second filtering hole connecting the internal space of the standpipe with the accommodating chamber, and the lower end of the standpipe is open and communicated with the filtering flow channel.

[0009] Preferably, the bottom wall of the cavity forms an overhead layer on one side of the filter flow channel, the overhead layer and the accommodating cavity are independent of each other, the lower end of the vertical pipe is connected to the overhead layer, and a movable baffle is provided between the overhead layer and the filter flow channel, which separates the overhead layer from the filter flow channel and can be swung open in the direction of the filter flow channel.

[0010] Preferably, a hollow filter barrel is provided on the top of the accommodating chamber, the filter barrel is provided with a third filter hole connecting the internal space of the filter barrel and the accommodating chamber, and the circulating water inlet pipe is connected to the filter barrel.

[0011] Preferably, the bottom wall of the cavity is partially sunken on one side of the filtering channel to form a discharge well, the discharge well and the filtering channel are independent of each other and are connected to the accommodating cavity, and the suction pipe extends into the discharge well.

[0012] Preferably, the bottom wall of the cavity is partially sunken on one side of the filtering channel to form a sewage well, the sewage well and the accommodating cavity are independent of each other and are connected to the filtering channel, and a drainage pipe extending into the sewage well is provided on the cabin body.

[0013] Preferably, a ventilation overflow pipe connected to the top of the cavity is provided on the cabin body.

[0014] Preferably, a thermal insulation hatch and a thermal insulation hatch cover for sealing the thermal insulation hatch is provided on the top of the cabin body.

[0015] Compared with the prior art, the present invention has significant improvements:

[0016] When the cold seawater tank of the present invention is in use, a certain amount of seawater can be pre-loaded in the cavity of the tank body, and then the drained catch is sent into the cavity of the tank body through the drainage and inlet device to mix with the seawater in the cavity, and the catch and seawater mixture in the cavity is output by the suction pipe to the subsequent processing line. At the same time, seawater is added to the cavity by the return pipe, and the seawater in the cavity is circulated and cooled by the refrigeration equipment connected by the circulation pipe to ensure that the seawater in the cavity of the tank body is sufficient and the seawater temperature is maintained to meet the requirements. Therefore, manual operation can be greatly reduced, the operation process can be simplified, and there is no need to repeatedly open and close the tank body to dump the catch, add new cold seawater, etc., which can adapt to the continuous operation of fishing vessels and can be widely applied to various types of fishing vessels with a high degree of automation, thereby improving the operation efficiency of fishing vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic side view of a cold sea water tank according to an embodiment of the present invention.

[0018] Figure 2 yes Figure 1A schematic top view of the cold sea water tank is shown.

[0019] Figures 3 to 5 In order Figure 2 Schematic diagram of the side view along the AA, BB and CC directions.

[0020] Figures 6 to 8 In order Figure 2 Schematic diagram of rear view along the DD, EE and FF directions.

[0021] Fig. 9 and Fig.10 In order Figure 1 Schematic diagram of top view along GG and HH directions.

[0022] Fig.11 yes Figure 6 Enlarged schematic diagram of the middle J part.

[0023] Fig.12 yes Fig. 9 Enlarged schematic diagram of the middle K section.

[0024] The reference numerals are described as follows:

[0025] 1. Deck 2. Cabin

[0026] 20. Cavity 201. Accommodating cavity

[0027] 202, filtration channel 203, overhead layer

[0028] 204, unloading well 205, sewage well

[0029] 21. Hull structure 22. Insulation layer

[0030] 23. Inner tank 3. Drainage device

[0031] 4. Suction pipe 5. Return pipe

[0032] 6. Filter plate 60, first filter hole

[0033] 71. Circulating water outlet pipe 72. Circulating water inlet pipe

[0034] 8. Standpipe 80, second filter hole

[0035] 9. Movable baffle 10. Limit stopper

[0036] 11. Partition 12. Drain pipe

[0037] 13. Filter barrel 130, third filter hole

[0038] 14. Ventilation overflow pipe 15. Insulation hatch cover DETAILED DESCRIPTION

[0039] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0043] like Figures 1 to 12 As shown, an embodiment of the cold seawater tank of the present invention. The cold seawater tank of this embodiment can be arranged under the deck 1 of a fishing boat for storing fish. The cold seawater tank of this embodiment includes a cabin 2, the interior of the cabin 2 is hollow to form a closed cavity 20, and the cabin 2 is provided with a draining device 3, a suction pipe 4, a return pipe 5 and a circulation pipe, the draining device 3, the suction pipe 4, the return pipe 5 and the circulation pipe are all connected with the cavity 20 of the cabin 2, the draining device 3 is used to transport the fish into the cavity 20, the suction pipe 4 is used to output the fish in the cavity 20, the return pipe 5 is used to input seawater into the cavity 20, and the circulation pipe is used to connect with a refrigeration device and realize the circulation refrigeration of seawater in the cavity 20, and the refrigeration device can be a conventional seawater refrigerator.

[0044] When the cold seawater tank of the present embodiment is in use, a certain amount of seawater can be pre-loaded in the cavity 20 of the cabin 2, and then the drained catch is sent into the cavity 20 of the cabin 2 through the draining and inlet device 3 to mix with the seawater in the cavity 20, and the catch and seawater mixture in the cavity 20 is output by the suction pipe 4 to the subsequent processing line. At the same time, seawater is replenished into the cavity 20 by the return pipe 5, and the seawater in the cavity 20 is circulated and cooled by the refrigeration equipment connected by the circulation pipe to ensure that there is sufficient seawater in the cavity 20 of the cabin 2 and the seawater temperature is maintained to meet the requirements. As a result, manual operations can be greatly reduced, the operation process can be simplified, and there is no need to repeatedly open and close the cabin 2 to dump the catch, replenish new cold seawater, etc., which can adapt to the continuous operation of fishing vessels and can be widely used in various types of fishing vessels with a high degree of automation to improve the operation efficiency of fishing vessels.

[0045] See also Figure 1 , Figures 3 to 5 In this embodiment, preferably, the bottom wall of the cavity 20 of the hull 2 ​​is inclined, and the bottom wall of the cavity 20 has a high position and a low position, that is, the bottom wall of the cavity 20 is inclined downward from the high position to the low position, and the suction pipe 4 is connected to the cavity 20 at the low position side of the bottom wall of the cavity 20, and the return pipe 5 is connected to the cavity 20 at the high position side of the bottom wall of the cavity 20. As a result, it is beneficial for the mixture of the catch and seawater in the cavity 20 to flow and converge to the low position side of the bottom wall of the cavity 20 under the action of self-weight, so that it is convenient for the suction pipe 4 to output it. In this embodiment, the lower surface of the hull 2 ​​is an inclined plane consistent with the inclination direction of the bottom wall of the cavity 20. When the cold seawater tank of this embodiment is set at the stern, it can be adapted to the linear elevation of the stern.

[0046] See also Figures 3 to 10In this embodiment, preferably, a filter plate 6 is provided at the bottom of the cavity 20 in the cabin body 2. The filter plate 6 divides the cavity 20 into a mutually independent accommodating chamber 201 and a filtering channel 202. The filtering channel 202 is located below the accommodating chamber 201. The filter plate 6 is provided with a first filtering hole 60 connecting the accommodating chamber 201 and the filtering channel 202. There are a plurality of first filtering holes 60, and all the first filtering holes 60 are evenly distributed on the filter plate 6. The drainage inlet device 3 and the suction pipe 4 are both connected to the accommodating chamber 201. The circulation pipe includes a circulating water outlet pipe 71 connected to the filtering channel 202 and a circulating water inlet pipe 72 connected to the accommodating chamber 201. The circulating water outlet pipe 71 and the circulating water inlet pipe 72 are respectively used to connect to the inlet and outlet of the refrigeration equipment. The drainage device 3 delivers the fish into the accommodating chamber 201, and the first filter hole 60 allows seawater to pass through but does not allow the fish to pass through, so that the fish and seawater mixture in the accommodating chamber 201 can be filtered, so that the fish remain in the accommodating chamber 201, and only seawater is in the filter flow channel 202. The fish and seawater mixture in the accommodating chamber 201 can be output by the suction pipe 4, and the seawater in the filter flow channel 202 can be output through the circulating water outlet pipe 71 and sent to the refrigeration equipment for refrigeration, and then sent to the accommodating chamber 201 by the circulating water inlet pipe 72, so as to realize the circulation refrigeration of seawater in the cavity 20 of the cabin body 2. The filter flow channel 202 is separated by the filter plate 6, which can prevent the fish from clogging the circulating water outlet pipe 71 or being sucked into the circulating water outlet pipe 71 and entering the refrigeration equipment, thereby ensuring the smooth circulation refrigeration of seawater in the cavity 20 of the cabin body 2.

[0047] Preferably, the middle part of the bottom wall of the cavity 20 of the cabin 2 sinks to form a flow channel extending along the inclined direction of the bottom wall of the cavity 20, the filter plate 6 is relatively arranged above the flow channel and forms a filtering flow channel 202 together with the flow channel, and the filter plate 6 is above the accommodating chamber 201, and the parts of the bottom wall of the cavity 20 located on both sides of the flow channel and the upper surface of the filter plate 6 together constitute the bottom wall of the accommodating chamber 201. As a result, the bottom wall of the filtering flow channel 202 and the bottom wall of the accommodating chamber 201 are both inclined downward from the high position to the low position of the bottom wall of the cavity 20, which is conducive to the seawater in the filtering flow channel 202 and the catch in the accommodating chamber 201 flowing and gathering to the low position side of the bottom wall of the cavity 20 under the action of their own weight. The circulating water outlet pipe 71 is connected to the filtering flow channel 202 at the low position side of the bottom wall of the cavity 20, and the opening of the circulating water outlet pipe 71 faces the high position side of the bottom wall of the cavity 20, which is conducive to the seawater flowing downward in the filtering flow channel 202 entering the circulating water outlet pipe 71. Preferably, the bottom wall of the cavity 20 located on both sides of the flow channel is flush with the upper surface of the filter plate 6, so that the bottom wall of the accommodating cavity 201 is a flat inclined surface, which is conducive to the flow and collection of the catch on the bottom wall of the accommodating cavity 201 to the lower side.

[0048] To facilitate cleaning of the filter channel 202, preferably, the filter plate 6 is detachably mounted on the bottom wall of the cavity 20. When necessary, the filter plate 6 can be removed to clean the filter channel 202. The manner in which the filter plate 6 is detachably mounted on the bottom wall of the cavity 20 is not limited. For example, one side of the filter plate 6 can be mounted on one side of the flow channel by a hinge, and the other side of the filter plate 6 can be mounted on the other side of the flow channel by a bolt. The filter plate 6 can be removed or installed and fixed by removing or tightening the bolt.

[0049] Considering the strength requirement, the total flow area of ​​all the first filter holes 60 on the filter plate 6 does not exceed a certain proportion of the area of ​​the filter plate 6 to ensure the load-bearing capacity of the filter plate 6. Preferably, the total flow area of ​​all the first filter holes 60 on the filter plate 6 does not exceed 30%-40% of the area of ​​the filter plate 6.

[0050] In order to increase the flow area and reduce the suction resistance, preferably, a hollow standpipe 8 can be vertically arranged in the accommodating chamber 201, and the standpipe 8 is provided with a second filter hole 80 connecting the internal space of the standpipe 8 and the accommodating chamber 201. There are a plurality of second filter holes 80, and all the second filter holes 80 are evenly distributed on the standpipe 8. The lower end of the standpipe 8 is open and connected to the filter flow channel 202, and the upper end of the standpipe 8 extends to the top of the accommodating chamber 201. The second filter hole 80 allows seawater to pass through but does not allow fish to pass through, so that the mixture of fish and seawater in the accommodating chamber 201 can be filtered, so that the fish remains in the accommodating chamber 201, and only seawater is in the standpipe 8, and the seawater in the standpipe 8 enters the filter flow channel 202 through the lower end opening of the standpipe 8. Seawater in the entire height direction of the accommodating chamber 201 can be sucked in through the second filter hole 80 on the vertical pipe 8, thereby increasing the flow area of ​​seawater filtration and reducing the resistance to seawater suction. At the same time, it can also achieve the purpose of disturbing the seawater in the cavity 20 of the cabin 2, accelerating the fusion of high and low temperature seawater in the cavity 20 and making the temperature uniform.

[0051] Preferably, see Figure 6 , Fig. 9 , Fig.11 and Fig.12The bottom wall of the cavity 20 is formed with an overhead layer 203 on one side of the filter flow channel 202. The overhead layer 203 and the accommodating cavity 201 are independent of each other. The lower end of the vertical pipe 8 is connected to the overhead layer 203. A movable baffle 9 is provided between the overhead layer 203 and the filter flow channel 202. The movable baffle 9 separates the overhead layer 203 from the filter flow channel 202 and can swing open in the direction of the filter flow channel 202. The seawater sucked into the vertical pipe 8 flows into the overhead layer 203 and can push the movable baffle 9 to swing toward the filter flow channel 202, and flows into the filter flow channel 202 with the swing of the movable baffle 9, that is, pushes the movable baffle 9 to swing open, so that the overhead layer 203 is connected to the filter flow channel 202, thereby realizing that the lower end of the vertical pipe 8 is connected to the filter flow channel 202 through the overhead layer 203. Preferably, the upper end of the movable baffle 9 is hinged to the top wall of the overhead layer 203, and the lower end of the movable baffle 9 is gap-matched with the bottom wall of the overhead layer 203, thereby facilitating the swing of the movable baffle 9 under the push of seawater. When the seawater flowing into the overhead layer 203 pushes the movable baffle 9 to swing toward the filter channel 202, the lower end of the movable baffle 9 leaves the bottom wall of the overhead layer 203 and swings upward, so that the overhead layer 203 is connected with the filter channel 202.

[0052] In order to prevent the seawater in the filtering channel 202 from flowing into the overhead layer 203, preferably, a limit block 10 is provided on the inner wall of the overhead layer 203 at a position close to the movable baffle 9. The limit block 10 is engaged with the movable baffle 9 to prevent the movable baffle 9 from swinging toward the overhead layer 203, thereby ensuring that the seawater flows from the overhead layer 203 into the filtering channel 202.

[0053] Preferably, a partition 11 is provided in the cavity 20, and the bottom wall of the cavity 20 is partially sunken on one side of the filtering channel 202 (i.e., the part of the bottom wall of the cavity 20 located on one side of the flow channel) to form a concave cavity, and the partition 11 is relatively arranged above the concave cavity and forms an overhead layer 203 together with the concave cavity, and the upper surface of the partition 11 is the accommodating cavity 201, and the upper surface of the partition 11 constitutes a part of the bottom wall of the accommodating cavity 201. Preferably, the sinking depth of the concave cavity is consistent with the sinking depth of the flow channel, that is, the bottom wall of the overhead layer 203 is flush with the bottom wall of the filtering channel 202, so that seawater flows from the overhead layer 203 to the filtering channel 202. Preferably, the upper surface of the partition 11 is flush with the upper surface of the filter plate 6, so that the bottom wall of the accommodating cavity 201 is a flat inclined surface, which is conducive to the flow and collection of the catch on the bottom wall of the accommodating cavity 201 to the low side.

[0054] The standpipe 8 can be arranged in the accommodating chamber 201. In this case, the second filter holes 80 can be distributed on the entire circumferential surface of the standpipe 8, so as to increase the flow area of ​​seawater filtration as much as possible. Considering the saving of the internal space of the accommodating chamber 201 and the convenience of operation, the standpipe 8 can be embedded in the hull 2 ​​under the condition that the structural strength of the hull 2 ​​allows, that is, the side wall of the accommodating chamber 201 is partially recessed to form an embedded space for accommodating the standpipe 8, and the standpipe 8 is placed in the embedded space. At this time, the second filter holes 80 can be distributed on the surface of the standpipe 8 exposed to the accommodating chamber 201. In order to facilitate the communication between the lower end of the standpipe 8 and the overhead layer 203, the overhead layer 203 can be extended to the bottom of the embedded space in the hull 2.

[0055] To facilitate formation of a flow path for seawater from the accommodating cavity 201 through the riser 8 and the overhead layer 203 to the filtering channel 202 , preferably, the riser 8 and the overhead layer 203 are both arranged on the high side of the bottom wall of the cavity 20 .

[0056] See also Figure 5 , Figure 8 and Fig. 9 Preferably, the bottom wall of the cavity 20 is partially sunken on one side of the filter flow channel 202 (i.e., the part of the bottom wall of the cavity 20 located on one side of the flow channel) to form a discharge well 204, the discharge well 204 and the filter flow channel 202 are independent of each other, and the upper end of the discharge well 204 is open and connected to the accommodating chamber 201, and the suction pipe 4 extends into the discharge well 204, which is conducive to collecting the catch through the discharge well 204, and improves the efficiency of the suction pipe 4 in outputting the catch in the accommodating chamber 201. In this embodiment, the discharge well 204 is located on the low side of the bottom wall of the cavity 20, and the catch can flow to the low side on the bottom wall of the accommodating chamber 201 and be collected in the discharge well 204.

[0057] See also Figure 3 , Figure 8 and Fig. 9Preferably, the bottom wall of the cavity 20 is partially sunken on one side of the filtering flow channel 202 (i.e., the part of the bottom wall of the cavity 20 located on one side of the flow channel) to form a sewage well 205. The sewage well 205 is independent of the accommodating chamber 201 and is connected to the filtering flow channel 202. The cabin 2 is provided with a drainage pipe 12 extending into the sewage well 205. The seawater in the cavity 20 can be precipitated in the sewage well 205. When the water quality in the cavity 20 of the cabin 2 is poor or there are many impurities, the seawater in the sewage well 205 can be sucked through the drainage pipe 12 to discharge the residual water in the cavity 20 to ensure the quality of the seawater in the cavity 20 of the cabin 2. Preferably, the filter plate 6 extends to the top of the sewage well 205 and separates the sewage well 205 from the accommodating chamber 201. The sewage well 205 is connected to the accommodating chamber 201 through the first filter hole 60 on the filter plate 6. The side of the sewage well 205 facing the filtering flow channel 202 is open and connected to the filtering flow channel 202. In this embodiment, the sewage well 205 is located at the lower side of the bottom wall of the cavity 20, which is conducive to the impurities in the seawater flowing to the lower side of the bottom wall of the cavity 20 and being collected and precipitated in the sewage well 205. Figure 4 In this embodiment, in order to prevent the suction port of the circulating water outlet pipe 71 from being at the lowest position (such as the lowest position of the suction port of the drain pipe 12) and sucking in the residues on the bottom of the cabin, the portion of the filter plate 6 located on the low side of the bottom wall of the cavity 20 is horizontally arranged, and the other portions are inclined and parallel to the bottom wall of the cavity 20. The circulating water outlet pipe 71 extends horizontally from below the horizontally arranged portion of the filter plate 6 and extends to the junction of the horizontally arranged portion and the inclined portion of the filter plate 6 to raise the circulating water outlet pipe 71 as much as possible.

[0058] See also Figure 4 , Figure 7 and Fig.10In this embodiment, preferably, a hollow filter barrel 13 is provided on the top of the accommodating chamber 201. The filter barrel 13 can be suspended in the accommodating chamber 201 through a connecting piece. The filter barrel 13 is provided with a third filter hole 130 connecting the internal space of the filter barrel 13 and the accommodating chamber 201. There are a plurality of third filter holes 130, and all third filter holes 130 are evenly distributed on the filter barrel 13. The circulating water inlet pipe 72 is connected to the filter barrel 13. The third filter hole 130 allows seawater to pass through but does not allow fish to pass through, so that the mixture of fish and seawater in the accommodating chamber 201 can be filtered, so that the fish remain in the accommodating chamber 201, and only seawater is left in the filter barrel 13. The circulating water inlet pipe 72 is connected to the accommodating chamber 201 through the filter barrel 13, so that the fish in the accommodating chamber 201 can be prevented from clogging the circulating water inlet pipe 72 or being sucked into the circulating water inlet pipe 72. Thus, the cold seawater tank of the present embodiment can realize the circulation of seawater in the cavity 20 of the tank body 2 in two directions, one of which is a circulation refrigeration mode: the seawater in the filter flow channel 202 is output through the circulation outlet pipe 71 and sent to the refrigeration device for refrigeration, and then sent to the filter barrel 13 and enter the accommodating chamber 201 through the circulation inlet pipe 72; the other is a circulation backwashing mode, which is opposite to the operation direction of the circulation refrigeration mode, and the seawater in the filter barrel 13 is output through the circulation inlet pipe 72 and sent to the refrigeration device, and then sent to the filter flow channel 202 through the circulation outlet pipe 71, which can play a backwashing role on the filter plate 6 above the filter flow channel 202. In the case of blockage of the filter plate 6, the catch blocked in the first filter hole 60 of the filter plate 6 can be flushed out through the circulation backwashing mode, thereby ensuring the working performance of the filter plate 6.

[0059] See also Figure 4In this embodiment, the return pipe 5 is connected to the cavity 20 at the high side of the bottom wall of the cavity 20. Preferably, the return pipe 5 is inserted into the accommodating cavity 201 at the middle of the cavity 20, and the end of the return pipe 5 extending into the accommodating cavity 201 is bent downward so that its opening faces downward to prevent the fish in the accommodating cavity 201 from entering the return pipe 5. In order to prevent the fish accumulated on the bottom wall of the accommodating cavity 201 from clogging the opening of the return pipe 5, a certain distance should be provided between the lower end face of the return pipe 5 and the bottom wall of the accommodating cavity 201 to ensure that the fish accumulated on the bottom wall of the accommodating cavity 201 will not contact the opening of the lower end face of the return pipe 5 to cause clogging. The return pipe 5 is used to input seawater into the cavity 20 to maintain the seawater level in the cavity 20. In a preferred embodiment, the return pipe 5 can be connected to the drainage equipment of the subsequent processing line. The fish catch and seawater mixture transported to the subsequent processing line by the suction pipe 4 is drained again by the drainage equipment, and the drained fish catch is sent to the processing equipment for processing. The drained seawater is sent back to the cavity 20 of the cabin 2 through the return pipe 5, thereby avoiding frequent injection of fresh seawater into the cavity 20. Fresh seawater has high cooling energy consumption and requires water supply from different layers through an external seawater pump, which increases energy consumption. The seawater drained from the subsequent processing line is sent back to the cold seawater tank, which can achieve same-layer water return and has low cooling energy consumption. Compared with replenishing water with fresh seawater, it can greatly reduce energy consumption.

[0060] See also Figure 6 In this embodiment, preferably, a ventilating overflow pipe 14 connected to the top of the cavity 20 is provided on the cabin 2, and the ventilating overflow pipe 14 is used for ventilation and overflow of the cavity 20 of the cabin 2. Preferably, the ventilating overflow pipe 14 includes a transverse pipe and a vertical pipe perpendicular to each other, one end of the transverse pipe is connected to the upper part of the vertical pipe, and the other end of the transverse pipe is connected to the top of the cavity 20, the vertical pipe is connected from top to bottom, and the upper end of the vertical pipe is higher than the top surface of the cabin 2, and the lower end of the vertical pipe is lower than the lowest position of the cabin 2. When installed on the ship, the upper end of the vertical pipe extends to the open deck, and the lower end of the vertical pipe extends to the side. When the suction pipe 4 extracts the mixture of the catch and seawater in the cavity 20, the ventilating overflow pipe 14 is used as a ventilating pipe, and the outside air can enter the cavity 20 through the ventilating overflow pipe 14 to balance the pressure in the cabin. When the liquid level in the cavity 20 is too high, the air-permeable overflow pipe 14 is used as an overflow pipe, and the mixture of fish catch and seawater in the cavity 20 can be discharged to the side of the ship by gravity through the air-permeable overflow pipe 14 .

[0061] In this embodiment, the suction pipe 4 can be a vacuum suction pipe, which can be connected to the vacuum system set up in the subsequent processing line, and can continuously suck the mixture of fish catch and seawater in the cavity 20 and send it to the subsequent processing line. In order to ensure the normal operation of the vacuum suction pipe, the diameter of the air-permeable overflow pipe 14 should be selected according to the specification requirements. Of course, the suction pipe 4 can also use other methods to suck the mixture of fish catch and seawater in the cavity 20, such as connecting a centrifugal pump to perform suction through the centrifugal pump.

[0062] See also Figure 2 , Figure 4 and Figure 6 In this embodiment, preferably, a heat preservation hatch and a heat preservation hatch cover 15 are provided on the top of the cabin 2, and the heat preservation hatch cover 15 seals the heat preservation hatch. When the drainage inlet device 3 fails and cannot deliver the catch into the cavity 20 of the cabin 2, the heat preservation hatch cover 15 can be opened and the catch can be poured into the cavity 20 from the heat preservation hatch; when the fishing boat adopts the traditional intermittent operation mode to fish, the catch can also be poured into the cavity 20 of the cabin 2 from the heat preservation hatch.

[0063] See also Figure 4 In this embodiment, preferably, the draining device 3 is arranged on the top surface of the cabin 2. For the convenience of arrangement, one side of the top surface of the cabin 2 is partially sunken to form a mounting platform. During assembly, the top surface of the cabin 2 is flush with the deck 1. There is a spacing space between the mounting platform and the deck 1 for accommodating the draining device 3. The draining device 3 is installed on the mounting platform. The bottom of the draining device 3 has an outlet connected to the cavity 20 of the cabin 2. The catch after being drained by the draining device 3 falls from the bottom outlet into the cavity 20. Preferably, the draining device 3 can be a spiral drainer. Of course, the draining device 3 can also adopt other types of draining devices.

[0064] In this embodiment, preferably, an on-off valve can be provided at the outlet of the draining and entering device 3, and the opening or closing of the on-off valve controls the opening and closing of the outlet of the draining and entering device 3, that is, controls whether the draining and entering device 3 conveys the catch into the cavity. A liquid level measuring device is provided in the cavity 20, which is used to measure the liquid level of the seawater or fish-water mixture in the cavity 20. The liquid level measuring device and the on-off valve are both connected to the controller, and the liquid level measuring device conveys the measured liquid level information to the controller, and the controller receives the liquid level information and controls the on-off valve of the cabin to open or close according to the liquid level information. When the liquid level information measured by the liquid level measuring device is higher than the set value, the controller controls the on-off valve to close, and the draining and entering device 3 stops conveying the catch into the cavity; when the liquid level information measured by the liquid level measuring device does not exceed the set value, the controller controls the on-off valve to open, and the draining and entering device 3 conveys the catch into the cavity. The set value is the maximum liquid level value allowed in the cavity 20 of the cabin body 2 set according to the actual application situation. In the initial state, a certain amount of seawater can be injected into the cavity 20 of the cabin 2 through an external seawater pump. After the catch is drained by the draining device 3 and sent into the cavity 20, it is mixed with the pre-installed seawater in the cavity 20 to form a mixture of catch and seawater, so as to maintain the temperature of the catch and facilitate the formation of fluid for transportation to the subsequent processing line. When the ratio of catch to seawater in the cavity 20 (referred to as the fish-water ratio) is too high, it is easy to be squeezed and damaged due to the large amount of catch, and the fluidity is poor, making it difficult to transport; when the fish-water ratio in the cavity 20 is too low, it is poor in economy due to the small amount of catch. Therefore, in order to take into account the convenience and economy of transportation, the fish-water ratio in the cavity 20 needs to be maintained within a certain range. Preferably, the fish-water ratio in the cavity 20 is maintained at 1:1-1:2. In this embodiment, the liquid level measuring device can preferably be a liquid level telemetry probe arranged in the cavity 20. In addition, in order to ensure and facilitate the operation as much as possible, a dial pressure gauge with local display can be set up to facilitate nearby reading and serve as a backup. The thermal insulation hatch cover 15 can also be opened and a depth gauge can be used to measure the liquid level and calibrate the liquid level telemetry probe and the local dial pressure gauge.

[0065] Preferably, a temperature measuring device and a regulating valve may be provided on the circulation pipe. In this embodiment, a temperature measuring device and a regulating valve are provided on both the circulation outlet pipe 71 and the circulation inlet pipe 72. The temperature sensor is used to measure the temperature of the seawater in the circulation outlet pipe 71 and the circulation inlet pipe 72, and the regulating valve is used to control the flow of the seawater in the circulation outlet pipe 71 and the circulation inlet pipe 72. The temperature measuring device and the regulating valve are both connected to the controller. The temperature measuring device transmits the measured temperature information to the controller. The controller receives the temperature information and controls the opening of the regulating valve according to the temperature information, thereby achieving the purpose of controlling the seawater temperature in the cavity 20 to fluctuate within the allowable set temperature range. The temperature measuring device may preferably be a temperature sensor.

[0066] Preferably, a reversing valve group can be provided on the circulation pipe. In this embodiment, a reversing valve group is provided on both the circulation outlet pipe 71 and the circulation inlet pipe 72, which is used to control the flow direction of seawater in the circulation outlet pipe 71 and the circulation inlet pipe 72, so as to realize the conversion between the circulation refrigeration mode and the circulation backwash mode. A flow meter is provided on the refrigeration equipment pipeline to detect the flow in the circulation outlet pipe 71. The reversing valve group and the flow meter are both connected to the controller. The flow meter transmits the detected flow information to the controller. The controller receives the flow information and controls the state of the reversing valve group according to the flow information. During normal operation, the circulation refrigeration mode is adopted. When the flow meter detects that the flow in the circulation outlet pipe 71 is lower than the preset value, it means that the flow in the circulation outlet pipe 71 is reduced and the filter plate 6 is blocked. At this time, the controller controls the reversing valve group to act according to the received flow information, so that the seawater in the circulation outlet pipe 71 and the circulation inlet pipe 72 flows in the opposite direction, and changes to the circulation backwash mode to backwash the filter plate 6. Of course, timed backwashing can also be set in the control program of the controller.

[0067] In this embodiment, the form of the controller is not limited, for example, a PLC controller or a single chip microcomputer may be used.

[0068] In this embodiment, the shape of the cabin 2 is not limited and can be designed according to the applied hull line and layout. Preferably, the cabin 2 is roughly in a cubic structure. The cabin capacity and the number of cabins 2 are also not limited and can be determined according to design requirements. A single cabin or multiple cabins or multiple cabins in rotation can be flexibly used in combination with actual operating conditions. Figures 3 to 10In this embodiment, the hull 2 ​​includes a hull structure 21, an insulation layer 22 and an inner liner 23. The hull structure 21 constitutes the outer wall of the hull 2, and its top wall is constituted by the deck 1. The hull structure 21 is a steel hull structure. The inner liner 23 constitutes the inner wall of the hull 2, that is, the cavity wall of the cavity 20. The inner liner 23 is in contact with the seawater in the cavity 20. Preferably, the inner liner 23 is made of galvanized steel plate or stainless steel plate, and a polyurea coating is sprayed on its surface, which can effectively prevent the seawater from corroding the inner liner 23. A sandwich is formed between the inner liner 23 and the hull structure 21 to play a role in heat insulation. The insulation layer 22 is filled in the sandwich between the hull structure 21 and the inner liner 23 to play a role in heat preservation. The insulation layer 22 can be made of polyurethane foam. Preferably, rock wool can be laid between the polyurethane foam and the inner liner 23 to meet certain fire prevention and insulation requirements, and at the same time, it can prevent the polyurethane foam from igniting when the process hole is blocked. During production, steel embedded parts can be welded on the components of each rib position of the hull structure 21, and embedded wooden planks can be fixed thereon with fasteners, and then the liner 23 can be fixed to the embedded wooden planks by fasteners. The liner 23 can be constructed by lap / joint welding of steel plates. After the liner 23 is fixed, an airtight test is performed on the hull and the liner 23, and all welds are inspected and non-destructively tested. Afterwards, polyurethane foam is poured into the interlayer between the hull structure 21 and the liner 23 through the process hole to form polyurethane foam, the process hole is sealed after laying rock wool, and then a polyurea coating is applied to the surface of the liner 23.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A cold seawater tank, characterized in that: The invention comprises a cabin (2), wherein the cabin (2) is hollow inside to form a closed cavity (20), and the cabin (2) is provided with a drainage inlet device (3), a suction pipe (4), a return pipe (5) and a circulation pipe, all of which are connected to the cavity (20); the drainage inlet device (3) is used to transport the fish catch into the cavity (20), the suction pipe (4) is used to output the fish catch in the cavity (20), the return pipe (5) is used to input seawater into the cavity (20), and the circulation pipe is used to connect to a refrigeration device and realize the circulation refrigeration of the seawater in the cavity (20); A filter plate (6) is provided at the bottom of the cavity (20), and the filter plate (6) divides the cavity (20) into a mutually independent accommodating cavity (201) and a filtering channel (202); the filtering channel (202) is located below the accommodating cavity (201); the filter plate (6) is provided with a first filtering hole (60) connecting the accommodating cavity (201) and the filtering channel (202); the water drainage device (3) and the suction pipe (4) are both connected to the accommodating cavity (201); and the circulation pipe comprises a circulation outlet pipe (71) connected to the filtering channel (202) and a circulation inlet pipe (72) connected to the accommodating cavity (201); A vertically hollow vertical pipe (8) is disposed in the accommodating chamber (201); the vertical pipe (8) is provided with a second filtering hole (80) connecting the internal space of the vertical pipe (8) and the accommodating chamber (201); the lower end of the vertical pipe (8) is open and communicates with the filtering flow channel (202); The bottom wall of the cavity (20) is formed with an overhead layer (203) on one side of the filtering channel (202); the overhead layer (203) and the accommodating cavity (201) are independent of each other; the lower end of the vertical pipe (8) is connected to the overhead layer (203); a movable baffle (9) is provided between the overhead layer (203) and the filtering channel (202); the movable baffle (9) separates the overhead layer (203) from the filtering channel (202) and can be swung open in the direction of the filtering channel (202).

2. The cold sea water tank according to claim 1, characterized in that: The bottom wall of the cavity (20) is arranged to be inclined, the suction pipe (4) is connected to the cavity (20) at the lower side of the bottom wall of the cavity (20), and the return pipe (5) is connected to the cavity (20) at the higher side of the bottom wall of the cavity (20).

3. The cold sea water tank according to claim 1, characterized in that: A hollow filter barrel (13) is provided at the top of the accommodating chamber (201); the filter barrel (13) is provided with a third filter hole (130) connecting the internal space of the filter barrel (13) and the accommodating chamber (201); and the circulating water inlet pipe (72) is connected to the filter barrel (13).

4. The cold sea water tank according to claim 1, characterized in that: The bottom wall of the cavity (20) is partially sunken on one side of the filtering channel (202) to form a discharge well (204); the discharge well (204) and the filtering channel (202) are independent of each other and are connected to the accommodating cavity (201); the suction pipe (4) extends into the discharge well (204).

5. The cold sea water tank according to claim 1, characterized in that: The bottom wall of the cavity (20) is partially sunken on one side of the filtering channel (202) to form a sewage well (205); the sewage well (205) is independent of the accommodating cavity (201) and is connected to the filtering channel (202); and a drainage pipe (12) extending into the sewage well (205) is provided on the cabin (2).

6. The cold sea water tank according to claim 1, characterized in that: The cabin body (2) is provided with a ventilation overflow pipe (14) which is connected to the top of the cavity (20).

7. The cold sea water tank according to claim 1, characterized in that: The top of the cabin body (2) is provided with a heat-insulating hatch and a heat-insulating hatch cover (15) for sealing the heat-insulating hatch.

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