A poultry slaughtering pre-cooling device

Abstract

The utility model discloses a precooling device for poultry slaughtering, including precooling box and mixing box, the precooling box inside from top to bottom staggered installation has first mesh belt conveyor, second mesh belt conveyor, third mesh belt conveyor and fourth mesh belt conveyor, and third mesh belt conveyor and fourth mesh belt conveyor top are all fixed and set up and have blown pipe. Advantageous effect: the utility model is provided with mixing box and liquid nitrogen tank, when precooling poultry, poultry carcass falls to the top surface of third mesh belt conveyor and fourth mesh belt conveyor after the spray cooling, and the air blower generates airflow and injects into the mixing box, and the gas delivery pump delivers the low-temperature nitrogen gas in the liquid nitrogen tank, and injects into the mixing box, mixes with the inhaled airflow, significantly reduces the airflow temperature, and the low-temperature airflow enters the blowpipe through the gas delivery pipe, and blows out through the blowhole, and further precooling and cooling are carried out on the poultry carcass after the spray cooling, and the secondary precooling is completed synchronously in the process of draining, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of poultry slaughtering and processing technology, specifically to a precooling device for poultry slaughtering. Background Technology

[0002] Pre-cooling of poultry is a key step in slaughtering and processing. It refers to the process of rapidly reducing the temperature of poultry carcasses to a safe range after bleeding, defecation, and evisceration, using specific equipment and processes to inhibit microbial growth, extend shelf life, improve meat quality, and meet food safety standards.

[0003] Traditional poultry precooling equipment is a spiral precooler. The spiral precooler contains cold water and uses spiral blades to move the poultry carcass to contact the cold water for precooling. Then, a blower blows air to reduce residual moisture. However, traditional blower equipment blows in room temperature air, which cannot perform secondary precooling at the same time. The precooling method of traditional precooling equipment is mainly water cooling, which is inefficient and affects work efficiency. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a pre-cooling device for poultry slaughtering, which has the advantages of secondary pre-cooling and improved work efficiency, thereby solving the problems mentioned in the background technology.

[0005] (II) Technical Solution To achieve the advantages of secondary precooling and improved work efficiency, the specific technical solution adopted by this utility model is as follows: A precooling device for poultry slaughter includes a precooling box and a mixing box. Inside the precooling box, a first mesh belt conveyor, a second mesh belt conveyor, a third mesh belt conveyor, and a fourth mesh belt conveyor are installed alternately from top to bottom. Blowpipes are fixedly mounted above the third and fourth mesh belt conveyors, and blowholes are connected through the surface of the blowpipes. A mixing box is installed in front of the precooling box, and a liquid nitrogen tank is installed on one side of the mixing box. A blower is connected through the mixing box via a blower pipe. A gas pump is fixedly installed on the top surface of the mixing box, and the input end of the gas pump is connected through the output end of the liquid nitrogen tank via a connecting pipe. The output end of the gas pump is connected through the mixing box via a gas filling pipe. The mixing box is connected through the blowpipe via a gas supply pipe.

[0006] Furthermore, spray pipes are fixedly mounted above both the first and second mesh belt conveyors, and spray nozzles are installed on the surface of the spray pipes. Water collection tanks are fixedly installed below the first and second mesh belt conveyors inside the pre-cooling box, and a return pipe is connected through the bottom of the water collection tank.

[0007] Furthermore, the nozzle and the return pipe are used in conjunction with an industrial chiller, with the output end of the industrial chiller connected to the nozzle and the input end of the industrial chiller connected to the return pipe.

[0008] Furthermore, a feeding port is provided through one end of the top surface of the precooling box, and a discharge port is provided through one end of the bottom surface of the precooling box.

[0009] Furthermore, the front facade of the precooling box is fixedly equipped with drive motors for driving the first mesh belt conveyor, the second mesh belt conveyor, the third mesh belt conveyor, and the fourth mesh belt conveyor.

[0010] Furthermore, the spray heads are distributed in multiple sets at equal intervals, and the spray heads adopt fan-shaped nozzles.

[0011] Furthermore, multiple sets of air nozzles are arranged at equal intervals, and the air nozzles blow air vertically downwards.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a precooling device for poultry slaughtering, which has the following beneficial effects: (1) This utility model is equipped with a mixing box and a liquid nitrogen tank. When precooling poultry, the poultry carcass is sprayed and cooled down, and then falls onto the top surface of the third and fourth mesh belt conveyors. The blower generates airflow and injects it into the mixing box. The air pump delivers low-temperature nitrogen from the liquid nitrogen tank and injects it into the mixing box. It mixes with the blown airflow, which significantly reduces the airflow temperature. The low-temperature airflow enters the blowpipe through the air delivery pipe and is blown out through the blowhole to further precool the poultry carcass after spraying and cooling down. The secondary precooling is completed simultaneously during the draining process, which improves the work efficiency.

[0013] (2) This utility model is equipped with a spray pipe and a spray head. The poultry carcass is put into the pre-cooling box through the feeding port and falls onto the top surface of the first mesh belt conveyor. Cold water is introduced into the spray pipe and sprayed out through the spray head to spray and cool the poultry carcass. The cooled water is collected in the water collection tank and flows back to the industrial chiller through the return pipe. After circulating cooling, it is introduced into the spray pipe for circulating spray pre-cooling. The cooling water is circulated and cooled in a concentrated manner, and the temperature of the sprayed cold water is more stable and reliable, thereby improving the pre-cooling efficiency. At the same time, the poultry carcass is conveyed by the first mesh belt conveyor and falls onto the top surface of the second mesh belt conveyor for turning over, which improves the comprehensiveness of cooling and pre-cooling and further improves the cooling and pre-cooling efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a precooling device for poultry slaughtering according to an embodiment of the present utility model; Figure 2 This is a front view of a precooling device for poultry slaughtering according to an embodiment of the present utility model; Figure 3 This is a rear view of a pre-cooling device for poultry slaughtering according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the external structure of a precooling device for poultry slaughtering according to an embodiment of the present utility model.

[0016] In the picture: 1. Precooling box; 2. First mesh belt conveyor; 3. Second mesh belt conveyor; 4. Third mesh belt conveyor; 5. Fourth mesh belt conveyor; 6. Feeding port; 7. Water collection tank; 8. Return pipe; 9. Spray pipe; 10. Spray head; 11. Blow pipe; 12. Blow nozzle; 13. Discharge port; 14. Gas supply pipe; 15. Mixing box; 16. Gas pump; 17. Gas supply pipe; 18. Blower; 19. Blower pipe; 20. Liquid nitrogen tank; 21. Connecting pipe. Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0018] According to an embodiment of the present invention, a precooling device for poultry slaughtering is provided.

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Please refer to them. Figure 1 and Figure 2According to an embodiment of the present invention, a precooling device for poultry slaughter includes a precooling box 1 and a mixing box 15. The precooling box 1 is a rectangular insulated box with a sealed precooling space inside to reduce cold loss. Inside the box, a first mesh belt conveyor 2, a second mesh belt conveyor 3, a third mesh belt conveyor 4, and a fourth mesh belt conveyor 5 are installed alternately from top to bottom. All mesh belt conveyors are made of stainless steel and have water-permeable holes on their surfaces to facilitate drainage and cooling. The alternate arrangement can extend the residence time of poultry carcasses in the precooling box 1, achieve continuous conveying, and improve processing efficiency. Both the third mesh belt conveyor 4 and the fourth mesh belt conveyor 5 are equipped with blowpipes 11 fixedly mounted on top of each other by brackets. The blowpipes 11 are metal pipes arranged along the length of the mesh belt conveyor. Blowholes 12 are evenly connected to the surface of the blowpipes 11. The blowholes 12 are downward circular openings. The space reserved below them meets the normal movement needs of poultry carcasses and ensures that the airflow can directly act on the surface of the carcass. A mixing chamber 15 is mounted on the ground in front of the precooling chamber 1 via a bracket. The mixing chamber 15 is a sealed metal container used to mix air and cryogenic nitrogen. A liquid nitrogen tank 20 is placed on the ground on one side of the mixing chamber 15. The liquid nitrogen tank 20 is used to store cryogenic liquid nitrogen. A blower pipe 19 is connected to one side wall of the mixing chamber 15 via a flange. The other end of the blower pipe 19 is connected to the air outlet of a blower 18 via a flange. The blower 18 is a centrifugal fan, which facilitates the blowing of room temperature air into the mixing chamber 15. A gas pump 16 is bolted to the top surface of the mixing chamber 15. The gas pump 16 is a cryogenic corrosion-resistant pump. Its input end is connected to the output end of the liquid nitrogen tank 20 through the connecting pipe 21, which can draw cryogenic nitrogen from the liquid nitrogen tank 20. The output end of the gas pump 16 is connected to the mixing chamber 15 through the gas filling pipe 17, which injects cryogenic nitrogen into the mixing chamber 15. A gas pipe 14 is also connected to the top surface of the mixing chamber 15 through the flange. The other end of the gas pipe 14 extends into the precooling chamber 1 and is connected to the blow pipe 11 for conveying cryogenic mixed gas. During the pre-cooling of poultry, the slaughtered poultry carcasses first undergo a pre-spray cooling process, and then fall onto the top of the third mesh belt conveyor 4 and the fourth mesh belt conveyor 5, moving slowly with the mesh belts. At the same time, the blower 18 is started, and the ambient temperature airflow generated by the blower 18 is injected into the mixing box 15 through the blower pipe 19; the gas pump 16 is started, and the gas pump 16 draws low-temperature nitrogen from the liquid nitrogen tank 20 and injects it into the mixing box 15 through the gas filling pipe 17. The low-temperature nitrogen and the ambient temperature airflow are fully mixed in the mixing box 15, significantly reducing the airflow temperature and forming a low-temperature mixed gas. The low-temperature mixed gas enters the blowpipe 11 through the gas supply pipe 14, and is then evenly blown out from the blowhole 12, directly acting on the surface of the poultry carcass after spray cooling. On the one hand, the low-temperature airflow can further pre-cool the carcass, rapidly reducing its temperature to the target range; on the other hand, the airflow can blow away excess moisture adhering to the carcass surface, simultaneously completing secondary pre-cooling during the draining process, eliminating the need for an additional draining step and significantly improving work efficiency. Please refer to Figure 1 and Figure 3 Above the first mesh belt conveyor 2 and the second mesh belt conveyor 3, spray pipes 9 are fixedly mounted by brackets. The spray pipes 9 are metal pipes arranged along the length of the mesh belt conveyor. Spray heads 10 are evenly installed on the surface of the spray pipes 9, which can spray cold water downwards. The first mesh belt conveyor 2 and the second mesh belt conveyor 3 are located inside the pre-cooling box 1, and both are fixedly mounted with water collection tanks 7 by brackets. The water collection tanks 7 are inclined metal tanks used to collect the cooling water after spraying. The lowest point of the bottom surface of the water collection tank 7 is connected to a return pipe 8 through a flange. The return pipe 8 is used to transport the collected cooling water to external equipment.

[0020] Poultry carcasses are fed into the pre-cooling box 1 through the feeding port 6 on the top surface of the pre-cooling box 1. Under the action of gravity, they fall onto the top surface of the first mesh belt conveyor 2 and move slowly with the mesh belt. An external industrial chiller delivers cooled water to the spray pipe 9. The cooled water is evenly sprayed onto the surface of the moving poultry carcasses through the spray nozzles 10 to cool the carcasses and remove heat from the carcass surface. The sprayed cooling water drips down under gravity and collects in the collection tank 7 below, then flows back to the industrial chiller along the return pipe 8. After being circulated and cooled by the industrial chiller, the cooling water is cooled to a set value and then transported back to the spray nozzle 9, realizing the recycling of cooling water. This circulating spray precooling method ensures that the temperature of the sprayed cooling water remains stable and reliable, avoiding the impact of water temperature rise on the precooling effect, thereby improving precooling efficiency. Meanwhile, the first mesh belt conveyor 2 and the second mesh belt conveyor 3 are arranged in an alternating manner. The output end of the first mesh belt conveyor 2 is located above the input end of the second mesh belt conveyor 3. After the poultry carcass is conveyed to the end by the first mesh belt conveyor 2, it falls onto the top surface of the second mesh belt conveyor 3 under the action of gravity. During this process, the carcass is automatically flipped so that the side that was originally facing down is facing up, and can be fully covered by the cold water sprayed by the spray head 10. This improves the comprehensiveness of cooling and precooling, avoids the problem of incomplete local cooling, and further improves the efficiency of cooling and precooling. Please refer to Figure 1 and Figure 3The nozzle 9 and return pipe 8 are used in conjunction with an industrial chiller. The industrial chiller is a common refrigeration device; its output end is connected to the nozzle 9 via a pipe to supply low-temperature cooling water to the nozzle 9. The input end of the industrial chiller is connected to the return pipe 8 via a pipe to collect the cooling water discharged from the water collection tank 7. The industrial chiller can adjust the cooling water temperature according to actual needs to ensure a stable circulating water temperature and provide a continuous and reliable low-temperature water source for spray pre-cooling. The industrial chiller is not shown in detail in the diagram. Please refer to Figure 1 and Figure 4 The precooling box 1 has a feeding port 6 through one end of its top surface. The feeding port 6 is a rectangular opening with a guide plate on the edge, which facilitates the workers or the front-end conveying equipment to put the poultry carcasses into the precooling box 1. The precooling box 1 has a discharge port 13 through one end of its bottom surface. The discharge port 13 is a rectangular opening, which can be connected to the subsequent processing equipment. After the precooling is completed, the poultry carcasses are transported to the end by the fourth mesh belt conveyor 5 and discharged from the discharge port 13, realizing the continuous feeding and discharge of poultry carcasses. Please refer to Figure 1 and Figure 4 The precooling box 1 has a drive motor bolted to its front facade. This drive motor is a geared motor, connected via chains or belts to the drive rollers of the first mesh belt conveyor 2, the second mesh belt conveyor 3, the third mesh belt conveyor 4, and the fourth mesh belt conveyor 5, providing power to the conveyors. This is a common drive structure. The first mesh belt conveyor 2, the second mesh belt conveyor 3, the third mesh belt conveyor 4, and the fourth mesh belt conveyor 5 have identical structures, each consisting of a mesh belt, drive rollers, driven rollers, and a support frame, ensuring stable and reliable conveying. Please refer to Figure 1 Multiple sets of spray heads 10 are evenly distributed along the length of the spray pipe 9, and the spray heads 10 adopt fan-shaped nozzles. The fan-shaped nozzles can atomize cold water into a fan-shaped water curtain, expand the spray coverage area, and make the cold water spray more evenly on the surface of poultry carcasses, avoid spray dead corners, and improve the spray cooling efficiency.

[0021] Please refer to Figure 1 Multiple sets of nozzles 12 are arranged at equal intervals along the length of the blowpipe 11, and the nozzles 12 are vertically downward. This arrangement allows the low-temperature airflow to act vertically on the surface of the poultry carcass, reducing airflow diffusion and ensuring that the cold energy is concentrated on the carcass, thus improving the pre-cooling efficiency. The design of multiple sets of nozzles 12 also expands the airflow coverage, ensuring that all moving poultry carcasses can be covered by the low-temperature airflow, further enhancing the pre-cooling effect. Working principle: When pre-cooling poultry, the drive motors of the industrial chiller, blower 18, air pump 16, and four mesh belt conveyors are started first. The industrial chiller cools the water and delivers it to the nozzle 9. The blower 18 blows room temperature air into the mixing tank 15. The air pump 16 draws low-temperature nitrogen from the liquid nitrogen tank 20 and injects it into the mixing tank 15 to form a low-temperature mixture, which is then delivered to the blowpipe 11. Workers put the slaughtered poultry carcasses into the pre-cooling box 1 through the feeding port 6. The carcasses fall onto the top surface of the first mesh belt conveyor 2. As the mesh belt moves, the spray nozzles 10 on the spray pipe 9 spray out cold water to cool the carcasses for the first time. The cooling water falls into the water collection tank 7 and flows back to the industrial chiller for circulation cooling through the return pipe 8. After the carcass moves to the end with the first mesh belt conveyor 2, it falls onto the top surface of the second mesh belt conveyor 3 to flip over. The spray head 10 sprays the other side of the carcass a second time to cool it down, ensuring that the cooling is comprehensive. After the carcass has finished spraying, it continues to move and falls onto the top surface of the third mesh belt conveyor 4 and the fourth mesh belt conveyor 5. The nozzle 12 on the blowpipe 11 blows out low-temperature mixed gas downwards, which completes the secondary pre-cooling while draining water from the carcass, further reducing the carcass temperature. Finally, the pre-cooled poultry carcasses are moved to the end by the fourth mesh belt conveyor 5 and discharged from the outlet 13 to enter the subsequent processing steps. The entire process realizes continuous conveying of poultry carcasses, spray cooling and low-temperature air pre-cooling, with high pre-cooling efficiency and uniform effect, meeting the pre-cooling requirements after poultry slaughter.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precooling device for poultry slaughtering, comprising a precooling chamber (1) and a mixing chamber (15), characterized in that, Inside the precooling box (1), a first mesh belt conveyor (2), a second mesh belt conveyor (3), a third mesh belt conveyor (4), and a fourth mesh belt conveyor (5) are installed alternately from top to bottom. A blowpipe (11) is fixedly mounted above the third mesh belt conveyor (4) and the fourth mesh belt conveyor (5), and a blowpipe (12) is connected through the surface of the blowpipe (11). A mixing box (15) is installed in front of the precooling box (1), and a liquid nitrogen tank is installed on one side of the mixing box (15). (20), and the mixing box (15) is connected to a blower (18) through a blower pipe (19). A gas pump (16) is fixedly installed on the top surface of the mixing box (15), and the input end of the gas pump (16) is connected to the output end of the liquid nitrogen tank (20) through a connecting pipe (21). The output end of the gas pump (16) is connected to the mixing box (15) through a gas filling pipe (17). The mixing box (15) is connected to the blowing pipe (11) through a gas supply pipe (14).

2. The precooling device for poultry slaughtering according to claim 1, characterized in that, Spray pipes (9) are fixedly mounted on the top of the first mesh belt conveyor (2) and the second mesh belt conveyor (3), and spray nozzles (10) are installed on the surface of the spray pipes (9). Water collection tanks (7) are fixedly installed inside the pre-cooling box (1) below the first mesh belt conveyor (2) and the second mesh belt conveyor (3). A return pipe (8) is connected through the bottom surface of the water collection tank (7).

3. A precooling device for poultry slaughtering according to claim 2, characterized in that, The nozzle (9) and return pipe (8) are used in conjunction with an industrial chiller, and the output end of the industrial chiller is connected to the nozzle (9), and the input end of the industrial chiller is connected to the return pipe (8).

4. A precooling device for poultry slaughtering according to claim 1, characterized in that, The precooling box (1) has a feeding port (6) through one end of its top surface and a discharge port (13) through one end of its bottom surface.

5. A pre-cooling device for poultry slaughtering according to claim 1, characterized in that, The precooling box (1) is fixedly equipped with drive motors for driving the first mesh belt conveyor (2), the second mesh belt conveyor (3), the third mesh belt conveyor (4) and the fourth mesh belt conveyor (5) on its front facade.

6. A precooling device for poultry slaughtering according to claim 2, characterized in that, The spray heads (10) are distributed in multiple groups at equal intervals, and the spray heads (10) adopt fan-shaped nozzles.

7. A precooling device for poultry slaughtering according to claim 1, characterized in that, The nozzles (12) are arranged in multiple sets at equal intervals, and the nozzles (12) blow air vertically downwards.

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