An aquatic product floating ice conveyor line

Abstract

A floating ice conveyor line for aquatic products provided by the present invention includes a conveying trough, a floating ice preparation mechanism and an ice surface cooling mechanism. The conveying trough is a long strip-shaped trough body with an opening at the top. An inlet and an outlet are respectively arranged at the head and tail ends of the conveying trough. The floating ice preparation mechanism includes a lifting assembly and a refrigeration assembly. The refrigeration assembly includes a plurality of refrigeration iron plates. The refrigeration iron plates are connected to the lifting end of the lifting assembly. A cavity is arranged inside the refrigeration iron plates, and the top of the refrigeration iron plates is connected to a liquid nitrogen storage tank through a pipeline. The refrigeration iron plates are also connected to a nitrogen discharge pipe through a pressure relief valve. The nitrogen discharge pipe provides nitrogen for the ice surface cooling mechanism; a layer of floating ice is formed on the water surface of the conveying trough by the floating ice preparation mechanism. The floating ice can reduce the ambient temperature around the aquatic products and keep it at a relatively low level, effectively inhibiting the growth and reproduction of microorganisms, slowing down the spoilage rate of the aquatic products, maintaining their freshness and quality, and at the same time making full use of two by-products generated by the floating ice preparation mechanism.

Description

Technical Field

[0001] The present invention relates to the field of floating ice transportation of aquatic products, and particularly to a floating ice conveyor line for aquatic products. Background Art

[0002] During the transportation of aquatic products through a conveyor line, floating ice is usually added for transportation. The floating ice can lower the ambient temperature around the aquatic products and keep it at a relatively low level, effectively inhibiting the growth and reproduction of microorganisms, slowing down the spoilage rate of aquatic products, and maintaining their freshness and quality. The Chinese invention patent with the publication number CN201220471887.9 discloses a floating ice partition device for a finished product cooling conveyor line. This invention can block the floating ice so that it does not output together with the finished product along with the conveyor belt. However, the above-mentioned existing technology still has the problem of ice melting. The ice melting will lower the temperature around the conveyor line, which may cause temperature fluctuations of the aquatic products. Some temperature-sensitive aquatic products, such as certain fish and shellfish, may be affected in terms of their freshness and quality due to temperature changes, and may even accelerate their spoilage process. The water generated by ice melting will increase the humidity around the conveyor line. A high-humidity environment is prone to breeding bacteria and molds, which is not conducive to the sanitary condition of aquatic products and may contaminate the aquatic products, affecting their quality and safety. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] In order to solve the above problems of the existing technology, the present invention provides a floating ice conveyor line for aquatic products.

[0005] (II) Technical Solutions

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] A floating ice conveyor line for aquatic products, comprising a conveying trough, a floating ice preparation mechanism, and an ice surface cooling mechanism;

[0008] The conveying trough is a long strip-shaped trough body with an opening at the top, and a water inlet and a water outlet are respectively arranged at the head and tail ends of the conveying trough;

[0009] The floating ice preparation mechanism includes a lifting component and a refrigeration component;

[0010] The refrigeration component includes a plurality of refrigeration iron plates. The refrigeration iron plates are connected to the lifting end of the lifting component. A cavity is arranged inside the refrigeration iron plates, and the top of the refrigeration iron plates is connected to a liquid nitrogen storage tank through a pipeline. The refrigeration iron plates are also connected to a nitrogen discharge pipe through a pressure relief valve. The nitrogen discharge pipe provides nitrogen after the evaporation of liquid nitrogen for the ice surface cooling mechanism;

[0011] The ice surface cooling mechanism includes gas delivery pipes oppositely arranged on both sides of the inner wall of the delivery tank. The gas delivery pipes are connected to the nitrogen discharge pipe, and a number of microporous pipes are provided on the gas delivery pipes. The air outlet of the microporous pipe faces the ice surface in the delivery tank.

[0012] Preferably, it further includes an aeration mechanism. The aeration mechanism includes aeration nozzles and an aeration pipe. A plurality of aeration nozzles are provided and are all arranged on the aeration pipe and extend to the bottom of the delivery tank. The aeration pipe is connected to the nitrogen discharge pipe.

[0013] Preferably, it further includes a precooling mechanism. The precooling mechanism includes a tubular heat exchanger. The water inlet of the tubular heat exchanger is connected to an external water source, the water outlet of the tubular heat exchanger is connected to the delivery tank, the air inlet of the tubular heat exchanger is connected to the nitrogen discharge pipe, and the air outlet of the tubular heat exchanger is connected to the aeration pipe through a pipeline.

[0014] Preferably, the refrigerating iron plate has a frustum structure with a smaller top and a larger bottom. A hydrophobic coating is applied on the inclined surface of the refrigerating iron plate. A diversion groove is provided at the bottom of the inclined surface of the refrigerating iron plate. A nickel-chromium alloy micro wire is embedded at the bottom of the diversion groove, and a number of overflow holes are provided on the diversion groove.

[0015] Preferably, it further includes a disinfection mechanism, including a water tank, an ozone generator and a high-pressure water gun. The condensed water generated on the refrigerating iron plate is collected through the water tank. The ozone generated by the ozone generator is delivered into the water tank, and the ozone is efficiently dissolved in water through a Venturi tube, a bubble diffuser or a turbine mixer. The water outlet of the water tank is sequentially connected to a pump and a high-pressure water gun through a pipeline.

[0016] Preferably, the lifting assembly includes a lifting frame, a motor, a lifting beam, a lead screw and a lifting block;

[0017] The lead screw is vertically arranged in the lifting frame, and one end of the top of the lead screw is connected to the motor;

[0018] The lifting block is threadedly connected to the lead screw and is slidably installed in the lifting frame;

[0019] The lifting beam is fixedly installed on the lifting block;

[0020] The refrigerating iron plate is installed on the lifting beam.

[0021] Preferably, the refrigerating iron plate includes an inner layer, an outer layer and a heat insulation layer arranged between the inner layer and the outer layer. Both the inner layer and the outer layer are made of stainless steel, and the heat insulation layer is made of polyurethane.

[0022] Preferably, it further includes a pushing mechanism, which includes a push plate and a transverse movement component. The push plate is arranged on the ice surface and is connected to the transverse movement component.

[0023] (III) Beneficial effects

[0024] The beneficial effects of the present invention are as follows: A layer of floating ice is formed on the water surface of the conveying trough by the floating ice preparation mechanism. The floating ice can reduce the ambient temperature around the aquatic products and keep it at a relatively low level, effectively inhibiting the growth and reproduction of microorganisms, slowing down the spoilage rate of aquatic products, maintaining their freshness and quality. At the same time, two by-products (nitrogen and condensed water) generated by the floating ice preparation mechanism are fully utilized:

[0025] 1. Nitrogen enters the gas pipeline and is ejected from the microporous pipe at a flow rate of 0.3 m / s, forming a 0.8 cm thick "cold air cushion" on the surface of the floating ice, maintaining the ice surface temperature at -2.1 °C and reducing the melting rate of the ice surface;

[0026] 2. Nitrogen is transported to each aeration nozzle through the aeration pipe, forming multiple rising nitrogen microbubbles in the conveying trough, which can generate a certain lifting force on the aquatic products conveyed under the floating ice, reducing the bottom contact rate of the aquatic products and the mechanical damage rate of the aquatic products. And nitrogen, as an inert gas, also has the function of preserving freshness or preventing oxidation of the aquatic products;

[0027] 3. Nitrogen enters the tubular heat exchanger to pre-cool the water body in the tubular heat exchanger, reducing the water flow temperature in the conveying trough, and then reducing the evaporation rate of liquid nitrogen in the refrigeration iron plate and the consumption rate of liquid nitrogen;

[0028] 4. The low-temperature condensed water has natural low-bacteria characteristics. After adding ozone, it forms an ozone solution, which can be used for cleaning and disinfecting the conveying trough. Description of the drawings

[0029] Figure 1 It is a schematic structural diagram of an aquatic product floating ice conveying line;

[0030] Figure 2 It is a schematic structural diagram of the ice surface cooling mechanism;

[0031] Figure 3 It is a schematic connection structure diagram of the ice surface cooling mechanism, the floating ice preparation mechanism and the aeration mechanism;

[0032] Figure 4 It is a schematic structural diagram of the ice surface cooling mechanism, the floating ice preparation mechanism, the aeration mechanism and the pre-cooling mechanism;

[0033] Figure 5 It is a schematic structural diagram of the disinfection mechanism;

[0034] Figure 6Schematic structural diagram of the lifting assembly;

[0035] Figure 7 Top view structural diagram of the refrigeration iron plate.

[0036] Description of the reference numerals in the drawings

[0037] 1. Conveyor trough;

[0038] 2. Floating ice preparation mechanism;

[0039] 21. Refrigeration assembly; 211. Refrigeration iron plate; 212. Liquid nitrogen storage tank; 213. Pressure relief valve; 214. Nitrogen discharge pipe; 215. Nichrome micro wire; 216. Overflow hole;

[0040] 22. Lifting assembly; 221. Lifting frame; 222. Lead screw; 223. Lifting block; 224. Motor; 225. Lifting beam;

[0041] 3. Ice surface cooling mechanism;

[0042] 31. Gas transmission pipe; 32. Micro pore pipe;

[0043] 4. Aeration mechanism;

[0044] 41. Aeration pipe; 42. Aeration nozzle;

[0045] 5. Tube heat exchanger;

[0046] 6. Disinfection mechanism;

[0047] 61. Water tank; 62. Ozone generator; 63. Pump; 64. High-pressure water gun. Detailed implementation manners

[0048] For better explaining the present invention for easy understanding, the present invention will be described in detail below with reference to the drawings through specific implementation manners.

[0049] Please refer to Figures 1 to 2 , the first embodiment of the present invention:

[0050] An aquatic product floating ice conveyor line includes a conveyor trough 1, a floating ice preparation mechanism 2 and an ice surface cooling mechanism 3;

[0051] The conveyor trough 1 is a long strip-shaped trough body with an opening at the top, and water inlets and outlets are respectively arranged at the head and tail ends of the conveyor trough 1;

[0052] The floating ice preparation mechanism 2 includes a lifting assembly 22 and a refrigeration assembly 21;

[0053] The refrigeration assembly 21 includes a plurality of refrigeration iron plates 211. The refrigeration iron plates 211 are connected to the lifting ends of the lifting assembly 22. A cavity is provided inside the refrigeration iron plates 211. The top of the refrigeration iron plates 211 is connected to a liquid nitrogen storage tank 212 through a pipeline. The refrigeration iron plates 211 are also connected to a nitrogen discharge pipe 214 through a pressure relief valve 213. The nitrogen discharge pipe 214 provides nitrogen after the evaporation of liquid nitrogen for the ice surface cooling mechanism 3.

[0054] The ice surface cooling mechanism 3 includes gas delivery pipes 31 oppositely arranged on both sides of the inner wall of the conveying tank 1. The gas delivery pipes 31 are connected to the nitrogen discharge pipe 214. A number of micro-hole pipes 32 are provided on the gas delivery pipes 31. The air outlets of the micro-hole pipes 32 face the ice surface inside the conveying tank 1.

[0055] During use, the liquid nitrogen storage tank 212 injects liquid nitrogen into the cavity inside the refrigeration iron plates 211 and controls its lifting in cooperation with the lifting assembly 22. When the refrigeration iron plates 211 come into contact with the water surface, a layer of floating ice with a thickness of 3 - 5 mm will quickly form on the water surface. Then, it is driven to rise by the lifting assembly 22 and separated from the water surface, which can avoid freezing all the water in the water tank. Moreover, the cold air generated by the evaporation of liquid nitrogen has a relatively high density and will sink to the surface of the water tank, reducing the water surface temperature and making the floating ice not easy to melt. The floating ice prepared by the floating ice preparation mechanism 2 on the conveying tank 1 can lower the ambient temperature around the aquatic products and keep it at a relatively low level, effectively inhibiting the growth and reproduction of microorganisms, slowing down the spoilage rate of aquatic products, and maintaining their freshness and quality. At the same time, the liquid nitrogen in the refrigeration iron plates 211 will evaporate to produce nitrogen. The generated nitrogen (-150 °C) enters the gas delivery pipes 31 and sprays out from the micro-hole pipes 32 at a flow rate of 0.3 m / s, forming a "cold air cushion" with a thickness of 0.8 cm on the surface of the floating ice, maintaining the ice surface temperature at -2.1 °C and reducing the ice surface melting rate.

[0056] Reference Figure 3 In the second embodiment of the present invention:

[0057] On the basis of the above embodiment, an aeration mechanism 4 is further included. The aeration mechanism 4 includes aeration nozzles 42 and an aeration pipe 41. A plurality of aeration nozzles 42 are provided and are all arranged on the aeration pipe 41 and extend to the bottom of the conveying tank 1. The aeration pipe 41 is connected to the nitrogen discharge pipe 214.

[0058] During use, the nitrogen generated after the evaporation of liquid nitrogen in the refrigeration iron plates 211 is transported to each aeration nozzle 42 through the aeration pipe 41, forming a plurality of rising nitrogen micro-bubbles in the conveying tank 1, which can generate a certain lifting force on the aquatic products transported under the floating ice, reducing the bottom contact rate of the aquatic products and lowering the mechanical damage rate of the aquatic products. Moreover, as an inert gas, nitrogen also has the function of preserving freshness or preventing oxidation for the aquatic products.

[0059] Reference Figure 4 In the third embodiment of the present invention:

[0060] On the basis of the above-mentioned second embodiment, a precooling mechanism is further included. The precooling mechanism includes a tubular heat exchanger 5. The water inlet of the tubular heat exchanger 5 is connected to an external water source, the water outlet of the tubular heat exchanger 5 is connected to the conveying tank 1, the air inlet of the tubular heat exchanger 5 is connected to the nitrogen discharge pipe 214, and the air outlet of the tubular heat exchanger 5 is connected to the aeration pipe 41 through a pipeline;

[0061] During use, after the liquid nitrogen in the refrigerating iron plate 211 evaporates to generate nitrogen, it enters the tubular heat exchanger 5 for heat exchange, and then is transported to the aeration pipe 41, and cooperates with the aeration nozzles 42 to form a plurality of upwardly rising nitrogen microbubbles in the conveying tank 1, reducing the bottom-touching rate of aquatic products and reducing the mechanical damage rate of aquatic products. The water body cooled by heat exchange in the tubular heat exchanger 5 is directly transported into the conveying tank 1, so that the water flow temperature in the conveying tank 1 is reduced, thereby reducing the evaporation rate of the liquid nitrogen in the refrigerating iron plate 211 and reducing the consumption rate of liquid nitrogen.

[0062] The temperature of the nitrogen generated after the evaporation of liquid nitrogen is about -150°C. If it is directly input to the bottom of the conveying tank 1, it is easy to cause icing at the bottom of the tank. However, the temperature of the nitrogen after heat exchange is about 2°C, which is not easy to cause icing at the bottom of the tank and is equivalent to the temperature of the cold water, so it is not easy to frostbite the transported aquatic products.

[0063] Reference Figure 5 and Figure 7 , the fourth embodiment of the present invention:

[0064] In this embodiment, the refrigerating iron plate 211 has a frustum structure with a smaller top and a larger bottom. A hydrophobic coating is applied on the inclined surface of the refrigerating iron plate 211. A diversion groove is provided at the bottom of the inclined surface of the refrigerating iron plate 211. A nickel-chromium alloy micro wire 215 is embedded at the bottom of the diversion groove, and a plurality of overflow holes 216 are provided on the diversion groove. A disinfection mechanism 6 is further included, including a water tank 61, an ozone generator 62, and a high-pressure water gun 64. The condensed water generated on the refrigerating iron plate 211 is collected by the water tank 61. The ozone generated by the ozone generator 62 is transported into the water tank 61, and the ozone is efficiently dissolved in water through a Venturi tube, a bubble diffuser or a turbine mixer. The water outlet of the water tank 61 is connected to the high-pressure water gun 64 through a pipeline in sequence through a pump 63;

[0065] During use, a large temperature difference is generated between the refrigerating iron plate 211 and the surrounding area. Therefore, condensed water is generated on the surface of the refrigerating iron plate 211. The condensed water flows into the diversion groove under the action of the inclined surface and is discharged into the water tank 61 through the overflow holes 216. The setting of the nickel-chromium alloy micro wire 215 can heat the diversion groove to prevent the condensed water from condensing in the diversion groove. The low-temperature condensed water collected by the water tank 61 has natural low-bacteria characteristics. After adding ozone, it forms an ozone solution, which can be used for cleaning and disinfecting the conveying tank 1.

[0066] Reference Figure 6, in this embodiment, the lifting assembly 22 includes a lifting frame 221, a motor 224, a lifting beam 225, a lead screw 222, and a lifting block 223;

[0067] The lead screw 222 is vertically arranged in the lifting frame 221, and one end of the top of the lead screw 222 is connected to the motor 224;

[0068] The lifting block 223 is threadedly connected to the lead screw 222 and is slidably installed in the lifting frame 221;

[0069] The lifting beam 225 is fixedly installed on the lifting block 223;

[0070] The refrigerating iron plate 211 is installed on the lifting beam 225;

[0071] During use, the motor 224 drives the lead screw 222 to rotate, driving the lifting block 223 on the lead screw 222 to perform lifting control, thereby adjusting the height of the refrigerating iron plate 211 on the lifting beam 225.

[0072] In this embodiment, the refrigerating iron plate 211 includes an inner layer, an outer layer, and a heat insulation layer provided between the inner layer and the outer layer. Both the inner layer and the outer layer are made of stainless steel, and the heat insulation layer is made of polyurethane.

[0073] In this embodiment, a pushing mechanism is further included. The pushing mechanism includes a push plate and a transverse movement assembly. The push plate is arranged on the ice surface and is connected to the transverse movement assembly;

[0074] During use, the push plate can push the seafood on the ice surface, and use the formed floating ice to realize ice surface transportation. A temperature gradient is generated in the conveying trough 1 under the influence of the floating ice. The temperature of the floating ice layer is -2°C, and the temperature of the water body is 3 - 4°C. Shrimps and crabs can be transported on the floating ice layer, while cephalopod aquatic products can be transported in the water body, realizing layered transportation.

[0075] It should be noted that the bottom of the trough body of the output trough slopes downward towards the water outlet direction, so that the aquatic products in the water body can be effectively transported.

[0076] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, are equally included in the patent protection scope of the present invention.

[0077] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A floating ice conveying line for aquatic products, characterized in that: It comprises a conveying trough (1), a floating ice preparation mechanism (2) and an ice surface cooling mechanism (3); The conveying trough (1) is a long strip trough body with an opening at the top, and a water inlet and a water outlet are respectively provided at the head and tail ends of the conveying trough (1); The floating ice preparation mechanism (2) comprises a lifting component (22) and a refrigeration component (21); The refrigeration assembly (21) comprises a plurality of refrigeration iron plates (211), the refrigeration iron plates (211) being connected to the lifting end of the lifting assembly (22), a cavity being arranged inside the refrigeration iron plates (211), and the top of the refrigeration iron plates (211) being connected to a liquid nitrogen storage tank (212) via a pipeline, and the refrigeration iron plates (211) being connected to a nitrogen exhaust pipe (214) via a pressure relief valve (213), and the nitrogen exhaust pipe (214) providing nitrogen gas after evaporation of liquid nitrogen to the ice surface cooling mechanism (3); The ice surface cooling mechanism (3) comprises an air delivery pipe (31) arranged on both sides of the inner wall of the conveying trough (1), the air delivery pipe (31) being connected to the nitrogen exhaust pipe (214), and a plurality of microporous tubes (32) are provided on the air delivery pipe (31), the air outlets of the microporous tubes (32) facing the ice surface in the conveying trough (1).

2. The aquatic product floating ice conveying line according to claim 1, characterized in that: It also comprises an aeration mechanism (4), the aeration mechanism (4) comprising an aeration nozzle (42) and an aeration pipe (41), a plurality of the aeration nozzles (42) are provided, all of which are provided on the aeration pipe (41) and extend to the bottom of the tank bottom of the conveying tank (1), and the aeration pipe (41) is connected to the nitrogen exhaust pipe (214).

3. The aquatic product floating ice conveying line according to claim 2, characterized in that: It also comprises a precooling mechanism, the precooling mechanism comprising a tubular heat exchanger (5), the water inlet of the tubular heat exchanger (5) being connected to an external water source, the water outlet of the tubular heat exchanger (5) being connected to the conveying trough (1), the air inlet of the tubular heat exchanger (5) being connected to the nitrogen exhaust pipe (214), and the air outlet of the tubular heat exchanger (5) being connected to the aeration pipe (41) via a pipeline.

4. The aquatic product floating ice conveying line according to claim 1, characterized in that: The cooling iron plate (211) has a cone structure that is small at the top and large at the bottom. The inclined surface of the cooling iron plate (211) is coated with a hydrophobic coating. A guide groove is provided at the bottom of the inclined surface of the cooling iron plate (211). A nickel-chromium alloy microwire is embedded in the bottom of the guide groove, and a plurality of overflow holes are provided on the guide groove.

5. The aquatic product floating ice conveying line according to claim 4, characterized in that: It also includes a disinfection mechanism (6), including a water tank (61), an ozone generator (62) and a high-pressure water gun (64). Condensed water generated on the cooling iron plate (211) is collected by the water tank (61). Ozone generated by the ozone generator (62) is transported to the water tank (61) and efficiently dissolved in water through a venturi tube, a bubble diffuser or a turbine mixer. The water outlet of the water tank (61) is connected to a pump (63) and a high-pressure water gun (64) in sequence through a pipeline.

6. The aquatic product floating ice conveying line according to claim 1, characterized in that: The lifting assembly (22) comprises a lifting frame (221), a motor (224), a lifting beam (225), a screw rod (222), and a lifting block (223); The screw rod (222) is vertically arranged in the lifting frame (221), and one end of the top of the screw rod (222) is connected to the motor (224); The lifting block (223) is threadedly connected to the screw rod (222) and is slidably mounted in the lifting frame (221); The lifting beam (225) is fixedly mounted on the lifting block (223); The refrigeration iron plate (211) is installed on the lifting beam (225).

7. The aquatic product floating ice conveying line according to claim 1, characterized in that: The refrigeration iron plate (211) comprises an inner layer, an outer layer and a heat-insulating layer arranged between the inner layer and the outer layer; the inner layer and the outer layer are both made of stainless steel, and the heat-insulating layer is made of polyurethane.

8. The aquatic product floating ice conveying line according to claim 1, characterized in that: It also includes a pushing mechanism, which includes a pushing plate and a transverse movement component. The pushing plate is arranged on the ice surface and connected to the transverse movement component.

Images