Transmission device of tunnel type liquid nitrogen refrigerator

Abstract

A transmission device of a tunnel type liquid nitrogen refrigerator comprises a machine base, a transmission mesh belt is arranged on the upper side of the machine base and is in transmission connection with a mesh belt driving device, two isolation devices are connected to the upper side of the machine base and are seamlessly arranged on the outer sides of the two long edges of the transmission mesh belt, and the isolation devices are arranged on the outer sides of the two long edges of the transmission mesh belt. A plurality of screens are connected to the upper side of the machine base at intervals in the long edge direction of the conveying mesh belt, the screens are located above the conveying mesh belt, and a spraying device is arranged above the screens and arranged on the machine base or fixed relative to the machine base. According to the utility model, the screen is used for reducing the impact force of liquid nitrogen sprayed by the liquid nitrogen spraying device, and the seamless plastic mesh belt and the isolation belt with low temperature resistance are used for preventing small granular and powdery materials with too light monomer mass from being blown away from the surface of the mesh belt to cause waste of products in the processing process and influence on the quality of final processed finished products.

Description

Technical Field

[0001] The utility model relates to the field of refrigeration, in particular to freezing equipment, in particular to a transmission device of a tunnel type liquid nitrogen freezer. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, consumers have higher requirements for food quality. From the national level to production enterprises and consumer terminals, food quality and safety are increasingly placed in a more important position. In order to effectively improve food quality and safety, more and more food manufacturers use quick freezing technology in the process of food processing, using ammonia, Freon or liquid nitrogen for refrigeration. Liquid nitrogen refrigeration can quickly freeze products and quickly pass through the ice crystal formation zone to prevent large ice crystals from forming in food cells and destroying cell walls. It can better maintain the original flavor and quality of the product, and has obvious environmental benefits. Therefore, liquid nitrogen refrigeration has become the main trend of food freezing.

[0003] The general liquid nitrogen quick freezing equipment on the market can usually be divided into cabinet-type liquid nitrogen quick freezing equipment and tunnel-type liquid nitrogen quick freezing equipment. Tunnel-type liquid nitrogen quick freezing equipment is used for multiple large-scale food processing and production. After the food that needs to be quick-frozen is placed in the tunnel inlet, the food enters the tunnel for quick freezing along with the transmission of the mesh belt. When the tunnel-type liquid nitrogen quick freezing equipment is working, the spray system inside the tunnel sprays liquid nitrogen, and the liquid nitrogen contacts the air to produce gasification and become a gas state with extremely low temperature. The tunnel contains several fans with adjustable speed to drive the gas circulation inside the tunnel, so as to achieve the purpose of evenly and quickly freezing the processed food.

[0004] During the food quick-freezing process, the transmission device of the tunnel-type liquid nitrogen quick-freezing equipment in the prior art will generate a certain degree of airflow and impact force due to the internal wind field and spray device of the quick-freezing equipment, resulting in small granular and powdery materials with too light monomer weight being blown off the surface of the mesh belt and falling from the gaps on both sides, causing product waste during the processing and affecting the quality of the final processed product. Summary of the invention

[0005] The utility model aims to provide a transmission device for a tunnel type liquid nitrogen freezer, which solves the technical problem that the internal wind field and the spraying device of the quick freezing equipment in the prior art will generate a certain degree of airflow and impact force, resulting in small granular and powdery materials with too light monomer weight being blown off the surface of the mesh belt and falling from the gaps on both sides.

[0006] The utility model discloses a transmission device of a tunnel type liquid nitrogen freezer, comprising a machine base, a transmission mesh belt is arranged on the upper side of the machine base, the transmission mesh belt is in driving connection with a mesh belt driving device, the mesh belt driving device is arranged in the machine base or is relatively fixed to the machine base, two isolation devices are connected to the upper side of the machine base, the isolation devices are seamlessly arranged on the outer sides of the two long sides of the transmission mesh belt, a plurality of screens are connected at intervals on the upper side of the machine base along the long side direction of the transmission mesh belt, the screens are located above the transmission mesh belt, a spray device is arranged above the screen, the spray device is arranged on the machine base or is relatively fixed to the machine base.

[0007] Furthermore, the transmission mesh belt is a seamless plastic mesh belt with low temperature resistance.

[0008] Furthermore, the isolation device is a strip-shaped baffle.

[0009] Furthermore, the screen is rectangular.

[0010] Furthermore, the spray device includes a liquid nitrogen delivery pipeline and a plurality of liquid nitrogen nozzles. The liquid nitrogen nozzles are arranged on the lower side of the liquid nitrogen delivery pipeline and directly above the screen. The liquid nitrogen nozzles are arranged along the short side direction of the transmission mesh belt.

[0011] Compared with the prior art, the utility model has a positive and obvious effect: the utility model uses a screen to reduce the impact force of liquid nitrogen sprayed by the liquid nitrogen spraying device, which can bring the following benefits to small granular and powder products frozen by liquid nitrogen:

[0012] Uniform freezing: When freezing small granular and powdered products with liquid nitrogen, if the liquid nitrogen spray device directly sprays the product, it may cause excessive impact force, resulting in adhesion between particles or damage to the particle surface. Using a screen can reduce the impact force of liquid nitrogen, allowing the liquid nitrogen to cover the particle surface more evenly, which helps to achieve uniform freezing of the product;

[0013] Maintain particle shape: small granules and powder products are easily deformed or broken by impact during the freezing process of liquid nitrogen. The impact force can be reduced by the screen, which can reduce the collision between particles and maintain the shape integrity of the particles;

[0014] Improve production efficiency: The use of screens can effectively control the spray range and intensity of liquid nitrogen, avoid the generation of a large amount of aerosol during the liquid nitrogen spraying process, improve the utilization rate of liquid nitrogen, reduce resource waste, and also help reduce production costs;

[0015] Maintain product quality: Reducing the impact of liquid nitrogen can avoid damage to the product surface or particle breakage, maintain product quality and taste, and ensure that the frozen product maintains a good appearance and edible properties.

[0016] The use of seamless plastic mesh belts with low-temperature resistance can effectively avoid the waste caused by products falling from the gaps of ordinary stainless steel metal mesh belts and affecting product processing quality.

[0017] The use of isolation belts can prevent wind from blowing small granular and powdery products from the center of the mesh belt to both sides of the mesh belt and finally falling from the gaps on both sides, causing waste and affecting product processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of a transmission device of a tunnel type liquid nitrogen freezer. DETAILED DESCRIPTION

[0019] The following embodiments will further illustrate the present invention, but are not intended to limit the present invention.

[0020] like Figure 1 As shown, this embodiment provides a transmission device for a tunnel-type liquid nitrogen freezer, including a machine base 1, a transmission mesh belt 2 is arranged on the upper side of the machine base 1, the transmission mesh belt 2 is transmission-connected to a mesh belt driving device (not shown in the figure), the mesh belt driving device is arranged in the machine base 1, or is relatively fixed to the machine base 1, two isolation devices 3 are connected to the upper side of the machine base 1, the isolation devices 3 are seamlessly arranged on the outer sides of the two long sides of the transmission mesh belt 2, and a plurality of screens 4 are connected at intervals on the upper side of the machine base 1 along the long side direction of the transmission mesh belt 2, the screens 4 are located above the transmission mesh belt 2, and a spray device 5 is arranged above the screen 4, and the spray device 5 is arranged on the machine base 1, or is relatively fixed to the machine base 1.

[0021] Furthermore, the transmission mesh belt 2 is a seamless plastic mesh belt with low temperature resistance.

[0022] Furthermore, the isolation device 3 is a strip-shaped baffle.

[0023] Furthermore, the screen 4 is rectangular.

[0024] Furthermore, the spray device 5 includes a liquid nitrogen delivery pipeline 6 and a plurality of liquid nitrogen nozzles 7. The liquid nitrogen nozzles 7 are arranged on the lower side of the liquid nitrogen delivery pipeline 6 and directly above the screen 4. The liquid nitrogen nozzles 7 are arranged along the short side direction of the transmission mesh belt 2.

[0025] Specifically, the machine base 1, mesh belt driving device (not shown) and seamless plastic mesh belt described in this embodiment all adopt known solutions in the prior art and will not be described in detail here.

[0026] The working principle of this embodiment is as follows: the transmission device is installed on the tunnel-type liquid nitrogen quick-freezing equipment. When in use, the product is placed at the entrance of the tunnel, and the transmission mesh belt 2 is driven by the driving device (not shown in the figure) to move, and the product is brought into the tunnel of the tunnel-type liquid nitrogen quick-freezing equipment. When the tunnel-type liquid nitrogen quick-freezing equipment is working, the spray device 5 on the transmission device sprays liquid nitrogen, which contacts with the air and becomes a gas state with extremely low temperature. Then, it reaches the surface of the product through the screen 4 under the spray device 5, which reduces the impact force of the sprayed liquid nitrogen, and can play a role in uniform freezing, maintaining the shape of particles, improving production efficiency, and maintaining product quality. The quick-freezing equipment contains several fans with adjustable speed to drive the gas circulation inside the tunnel, so as to achieve the purpose of uniformly and quickly freezing the processed food. At the same time, the isolation device 3 is used to prevent small particles or powdered materials from being blown away from the surface of the transmission mesh belt 2 by the wind field and the impact force of the spray device 5.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transmission device for a tunnel type liquid nitrogen freezer, characterized in that: It includes a machine base, a transmission mesh belt is arranged on the upper side of the machine base, the transmission mesh belt is connected to a mesh belt driving device, the mesh belt driving device is arranged in the machine base or fixed relatively to the machine base, two isolation devices are connected to the upper side of the machine base, the isolation devices are seamlessly arranged on the outside of the two long sides of the transmission mesh belt, a plurality of screens are connected at intervals on the upper side of the machine base along the long side direction of the transmission mesh belt, the screens are located above the transmission mesh belt, a spray device is arranged above the screen, the spray device is arranged on the machine base or fixed relatively to the machine base.

2. A transmission device for a tunnel type liquid nitrogen freezer according to claim 1, characterized in that: The transmission mesh belt is a seamless plastic mesh belt with low temperature resistance.

3. The transmission device of a tunnel type liquid nitrogen freezer according to claim 1, characterized in that: The isolation device is a strip-shaped baffle.

4. The transmission device of a tunnel type liquid nitrogen freezer according to claim 1, characterized in that: The screen is rectangular.

5. The transmission device of a tunnel type liquid nitrogen freezer according to claim 1, characterized in that: The spray device comprises a liquid nitrogen delivery pipeline and a plurality of liquid nitrogen nozzles. The liquid nitrogen nozzles are arranged on the lower side of the liquid nitrogen delivery pipeline and directly above the screen. The liquid nitrogen nozzles are arranged along the short side direction of the transmission mesh belt.

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