A recirculating chiller for nitrogen

Abstract

The utility model discloses a kind of for nitrogen's circulating coolers, including shell, shell includes nitrogen inlet and nitrogen outlet, cooling cavity is equipped between nitrogen inlet and nitrogen outlet, shell further includes inner chamber, cooling cavity is located in inner chamber, cooling pipeline is equipped in inner chamber, cooling pipeline includes multiple cooling branch pipes, multiple cooling branch pipes are located in cooling cavity, form multiple heat exchange nets;Shell's outer wall and inner wall between still have interlayer, interlayer includes water inlet and water outlet, cooling pipeline is equipped with shunt and confluence, shunt and confluence are communicated with water inlet and water outlet respectively by pipeline, so that interlayer is formed into water jacket.The utility model is by being arranged between the outer wall and the inner wall of shell interlayer, so that interlayer is formed into water jacket mode, reduce the heat of high-temperature nitrogen gas transmission to shell outer wall in the process of using nitrogen cooler, further avoid shell temperature excessively high, reduce the risk of scald.

Description

Technical Field

[0001] This utility model belongs to the field of nitrogen cooling, specifically relating to a circulating cooler for nitrogen. Background Technology

[0002] Nitrogen, as a chemically inert and environmentally friendly gas, is often used as a refrigerant in heat exchange. However, after heat exchange, the temperature of nitrogen rises, requiring cooling treatment before it can be reused.

[0003] In the prior art, such as patent document CN201170697Y, a high-efficiency nitrogen cooler is disclosed, including a shell and heat exchange tubes. The heat exchange efficiency is improved by setting finned tubes on the heat exchange tubes. However, when this nitrogen cooler is in use, the high-temperature nitrogen gas comes into direct contact with the shell, which can easily cause the shell temperature to become too high, posing a risk of burns. Summary of the Invention

[0004] To address the problems in the existing technology, this utility model proposes a circulating cooler for nitrogen. By setting a jacket between the outer and inner walls of the shell, and forming the jacket as a water jacket, the heat transferred from the high-temperature nitrogen to the outer wall of the shell during use is reduced, thereby avoiding excessive shell temperature and reducing the risk of burns.

[0005] This invention is implemented as follows: A circulating cooler for nitrogen includes a shell, which includes a nitrogen inlet and a nitrogen outlet. A hollow cooling cavity is provided between the nitrogen inlet and the nitrogen outlet. The nitrogen inlet and the nitrogen outlet are respectively connected to external equipment to form a circulation loop. The shell also includes an inner cavity, in which the cooling cavity is located. A cooling pipe is provided in the inner cavity, and the cooling pipe includes multiple cooling branch pipes arranged in parallel. These multiple cooling branch pipes are located in the cooling cavity, forming multiple heat exchange meshes arranged in parallel along the nitrogen flow direction. When nitrogen enters the cooling cavity, it exchanges heat with the heat exchange meshes to achieve nitrogen cooling. The heat exchange meshes increase the contact area between the cooling branch pipes and the nitrogen, thereby improving the nitrogen cooling efficiency.

[0006] The outer and inner walls of the casing are further separated by a jacket, which includes an inlet and an outlet. The inlet and outlet ends of the cooling pipes are respectively provided with a branch port and a confluence port. The branch port is connected to the inlet port via a pipe, and the confluence port is connected to the outlet port via a pipe, thus forming a water jacket. The water jacket prevents the outer wall temperature of the casing from becoming too high. Since high-temperature nitrogen enters the cooling chamber through the nitrogen inlet, it has already come into thermal contact with the casing before cooling. The water jacket contains circulating cooling water to absorb the heat transferred from the high-temperature nitrogen to the casing, preventing the outer wall temperature from becoming too high and thus reducing the risk of burns from the casing.

[0007] Preferably, the water inlet is located at the bottom of the water jacket, the water outlet is located at the top of the water jacket, and the inlet end of the cooling pipe is lower than the outlet end of the cooling pipe, so that the cooling water in the cooling pipe and the water jacket flows from bottom to top, and the cooling water in the water jacket fills most of the area inside the water jacket under the action of gravity, preventing the cooling water in the water jacket from flowing out quickly, which would prevent the cooling water in the water jacket from fully absorbing the heat transferred to the shell by the high-temperature nitrogen gas, thus improving the reliability of the water jacket.

[0008] Preferably, the inner cavity is provided with an installation port communicating with the outside. The cooling pipe is provided with two baffles adapted to the inner cavity, each baffle located at one end of the cooling branch pipe. When the cooling pipe is installed in the inner cavity, the baffles fit against the water jacket, forming the cooling chamber between the baffles. The installation port is used to install the cooling pipe, allowing it to be installed in the inner cavity in a non-fixed manner, thus facilitating installation and removal. This improves the convenience of the cooling pipe while ensuring its cooling effect.

[0009] Specifically, a cover plate is provided at the mounting port to cover the mounting port and seal the inner cavity. The inlet and outlet ends of the cooling pipe pass through the cover plate from the inside out, exposing the branch port and the junction port. The cover plate is used to seal the mounting port, creating a sealed environment within the inner cavity. Since the cooling pipe is installed in the inner cavity in a non-fixed manner, gaps inevitably exist between the partition and the inner wall of the inner cavity, posing a risk of nitrogen leakage. The cover plate improves the sealing performance of the inner cavity, preventing nitrogen from leaking out and enhancing the reliability of the inner cavity.

[0010] Specifically, a heat insulation plate is also provided inside the inner cavity. The outer periphery of the heat insulation plate is fitted against the inner periphery of the mounting port, and the outer end face of the heat insulation plate abuts against the cover plate. Since the mounting port connects the inner cavity to the outside, the water jacket cannot cover the mounting port. The heat insulation plate is used to prevent the nitrogen gas in the inner cavity from transferring heat to the cover plate, avoiding excessive temperature of the cover plate, thereby improving the safety of the cover plate.

[0011] Preferably, the cooling branch pipes of adjacent heat exchangers are arranged in a staggered manner, so that the projections of the cooling branch pipes of adjacent heat exchangers on the projection plane parallel to the heat exchangers do not overlap. When nitrogen flows through multiple heat exchangers, the staggered arrangement of the cooling branch pipes of adjacent heat exchangers can reduce the flow rate of nitrogen, allowing the nitrogen to fully contact the heat exchangers, thereby improving the cooling efficiency of nitrogen.

[0012] Preferably, both the nitrogen inlet and the nitrogen outlet are provided with connecting flanges, and the outer end face of the connecting flange is also provided with a sealing groove. When the circulating cooler is connected to external equipment, the independently set sealing unit is installed in the sealing groove, thereby improving the connection sealing performance of the circulating cooler and effectively preventing nitrogen leakage, especially preventing high-temperature nitrogen leakage before cooling, thus improving the safety of the circulating cooler.

[0013] Preferably, the radial dimensions of the nitrogen inlet and nitrogen outlet are smaller than the radial dimension of the cooling chamber. According to the continuity equation in fluid mechanics, when the fluid flow rate is constant, the larger the pipe cross-section, the slower the fluid velocity. When the radial dimension of the nitrogen inlet is smaller than the radial dimension of the cooling chamber, the flow velocity of nitrogen in the cooling chamber can be reduced, allowing the nitrogen to fully contact the heat exchange mesh and improving the cooling efficiency of the nitrogen.

[0014] Preferably, the inlet, outlet, branch outlet, and confluence outlet are all provided with internal threads, so that the pipelines connecting the inlet, outlet, branch outlet, and confluence outlet are connected by threaded connection. The threaded connection has a self-locking function, which can prevent the pipeline from loosening and improve the connection reliability of the pipeline.

[0015] Preferably, the housing is also provided with multiple lifting rings. These lifting rings enable the circulating cooler to be transported and installed via hoisting, improving the convenience of handling and installation.

[0016] The beneficial effects of this utility model are:

[0017] This invention proposes a circulating cooler for nitrogen. On one hand, it consists of multiple heat exchange meshes arranged in parallel along the nitrogen flow direction. When nitrogen enters the cooling chamber, it exchanges heat with the heat exchange meshes, increasing the contact area between the cooling branch pipes and the nitrogen, thus improving the nitrogen cooling efficiency. On the other hand, by setting a jacket between the outer and inner walls of the shell, forming a water jacket, the heat transferred from the high-temperature nitrogen to the outer wall of the shell during use is reduced, thereby avoiding excessive shell temperature and reducing the risk of burns. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the circulating cooler of this utility model;

[0019] Figure 2 This is a side view of the circulating cooler of this utility model;

[0020] Figure 3 This is a schematic diagram of the cooling branch pipe of the circulating cooler of this utility model.

[0021] Figure label:

[0022] 1. Shell; 2. Cover plate; 11. Nitrogen inlet; 12. Nitrogen outlet; 13. Water jacket; 14. Cooling chamber; 15. Inner cavity; 16. Cooling pipes; 17. Connecting flange; 18. Lifting ring; 131. Water inlet; 132. Water outlet; 151. Heat insulation plate; 161. Inlet end; 162. Outlet end; 163. Diverter port; 164. Manifold port; 165. Cooling branch pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-3 As shown, a circulating cooler for nitrogen includes a housing 1, which includes a nitrogen inlet 11 and a nitrogen outlet 12. A hollow cooling chamber 14 is provided between the nitrogen inlet 11 and the nitrogen outlet 12. The nitrogen inlet 11 and the nitrogen outlet 12 are respectively connected to external equipment to form a circulation loop.

[0025] In this embodiment, both the nitrogen inlet 11 and the nitrogen outlet 12 are provided with connecting flanges 17. The outer end face of the connecting flange 17 is also provided with a sealing groove. When the circulating cooler is connected to external equipment, the independently set sealing unit is installed in the sealing groove, thereby improving the connection sealing performance of the circulating cooler and effectively preventing nitrogen leakage, especially preventing high-temperature nitrogen leakage before cooling, thus improving the safety of the circulating cooler.

[0026] In this embodiment, the radial dimensions of the nitrogen inlet 11 and the nitrogen outlet 12 are smaller than the radial dimension of the cooling chamber 14. According to the continuity equation in fluid mechanics, when the fluid flow rate is constant, the larger the pipe cross-section, the slower the fluid velocity. When the radial dimension of the nitrogen inlet 11 is smaller than the radial dimension of the cooling chamber 14, the flow velocity of nitrogen in the cooling chamber 14 can be reduced, allowing the nitrogen to fully contact the heat exchange mesh and improving the cooling efficiency of the nitrogen.

[0027] The housing 1 also includes an inner cavity 15, and a cooling cavity 14 is disposed within the inner cavity 15. A cooling pipe 16 is provided within the inner cavity 15, and the cooling pipe 16 includes a plurality of cooling branch pipes 165 arranged in parallel. The plurality of cooling branch pipes 165 are disposed within the cooling cavity 14, forming a plurality of heat exchange meshes arranged in parallel along the nitrogen flow direction. When nitrogen enters the cooling cavity 14, it exchanges heat with the heat exchange meshes to achieve cooling of the nitrogen. The heat exchange meshes increase the contact area between the cooling branch pipes 165 and the nitrogen, thereby improving the cooling efficiency of the nitrogen.

[0028] In this embodiment, the inner cavity 15 is provided with an installation port communicating with the outside. The cooling pipe 16 is provided with two partitions adapted to the inner cavity 15. The two partitions are respectively located at both ends of the cooling branch pipe 165. When the cooling pipe 16 is installed in the inner cavity 15, the partitions fit against the water jacket 13, forming the cooling cavity 14 between the partitions. The installation port is used to install the cooling pipe 16, allowing the cooling pipe 16 to be installed in the inner cavity 15 in a non-fixed manner, thereby making the cooling pipe 16 easy to install and remove. While ensuring the cooling effect of the cooling pipe 16, the convenience of the cooling pipe 16 is improved.

[0029] Specifically, a cover plate 2 is provided at the mounting port, which covers the mounting port to seal the inner cavity 15. The inlet end 161 and outlet end 162 of the cooling pipe 16 pass through the cover plate 2 from the inside out, exposing the branch port 163 and the confluence port 164. The cover plate 2 is used to seal the mounting port, creating a sealed environment for the inner cavity 15. Since the cooling pipe 16 is installed in the inner cavity 15 in a non-fixed manner, there will inevitably be gaps between the partition and the inner wall of the inner cavity 15, posing a risk of nitrogen leakage. The cover plate 2 improves the sealing performance of the inner cavity 15, preventing nitrogen from leaking out of the inner cavity 15 and improving the reliability of the inner cavity 15.

[0030] In this embodiment, the cooling branch pipes 165 of adjacent heat exchangers are arranged in an alternating manner, so that the projections of the cooling branch pipes 165 of adjacent heat exchangers on the projection plane parallel to the heat exchangers do not overlap. When nitrogen flows through multiple heat exchangers, the alternating arrangement of the cooling branch pipes 165 of adjacent heat exchangers can reduce the flow rate of nitrogen, allowing the nitrogen to fully contact the heat exchangers, thereby improving the cooling efficiency of the nitrogen.

[0031] The outer and inner walls of the housing 1 are further separated by a jacket, which includes an inlet and an outlet 132. The inlet end 161 and outlet end 162 of the cooling pipe 16 are respectively provided with a branch port 163 and a confluence port 164. The branch port 163 is connected to the inlet through a pipe, and the confluence port 164 is connected to the outlet 132 through a pipe, so that the jacket forms a water jacket 13. The water jacket 13 is used to prevent the outer wall temperature of the housing 1 from becoming too high. Since high-temperature nitrogen enters the cooling chamber 14 through the nitrogen inlet 11, the high-temperature nitrogen has already come into thermal contact with the housing 1 before cooling. The water jacket 13 is provided with circulating cooling water to absorb the heat transferred from the high-temperature nitrogen to the housing 1, thereby avoiding the outer wall temperature of the housing 1 from becoming too high and reducing the risk of burns from the housing 1.

[0032] In this embodiment, the water inlet is located at the bottom of the water jacket 13, the water outlet 132 is located at the top of the water jacket 13, and the inlet end 161 of the cooling pipe 16 is lower than the outlet end 162 of the cooling pipe 16. This allows the cooling water in the cooling pipe 16 and the water jacket 13 to flow from bottom to top, so that the cooling water in the water jacket 13 fills most of the area inside the water jacket 13 under the action of gravity. This prevents the cooling water in the water jacket 13 from flowing out quickly, which would prevent the cooling water in the water jacket 13 from being able to fully absorb the heat transferred from the high-temperature nitrogen gas to the shell 1, thereby improving the reliability of the water jacket 13.

[0033] In this embodiment, the inlet, outlet 132, branch outlet 163, and confluence outlet 164 are all provided with internal threads, so that the pipelines connecting the inlet, outlet 132, branch outlet 163, and confluence outlet 164 are connected by threaded connection. The threaded connection has a self-locking function, which can prevent the pipeline from loosening and improve the connection reliability of the pipeline.

[0034] In this embodiment, a heat insulation plate 151 is also provided inside the inner cavity 15. The outer periphery of the heat insulation plate 151 is fitted with the inner periphery of the mounting port, and the outer end face of the heat insulation plate 151 abuts against the cover plate 2. Since the mounting port connects the inner cavity 15 to the outside, the water jacket 13 cannot cover the mounting port. The heat insulation plate 151 is used to prevent the nitrogen gas in the inner cavity 15 from transferring heat to the cover plate 2, avoiding excessive temperature of the cover plate 2, thereby improving the safety of the cover plate 2.

[0035] In this embodiment, the housing 1 is also provided with a plurality of lifting rings 18. The lifting rings 18 enable the circulating cooler to be transported and installed by means of hoisting, thereby improving the convenience of transporting and installing the circulating cooler.

[0036] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A circulating cooler for nitrogen gas, comprising a housing, the housing comprising a nitrogen gas inlet and a nitrogen gas outlet, a hollow cooling cavity being provided between the nitrogen gas inlet and the nitrogen gas outlet, the nitrogen gas inlet and the nitrogen gas outlet being connected with external equipment respectively to form a circulating loop, characterized in that: The shell also includes an inner cavity, and the cooling cavity is disposed in the inner cavity. The inner cavity is provided with cooling pipes, and the cooling pipes include multiple cooling branch pipes arranged in parallel. The multiple cooling branch pipes are disposed in the cooling cavity to form multiple heat exchange meshes arranged in parallel along the nitrogen flow direction. The outer wall and inner wall of the shell are further provided with a sandwich layer, which includes a water inlet and a water outlet. The inlet end and outlet end of the cooling pipe are respectively provided with a diverter port and a confluence port. The diverter port is connected to the water inlet port through a pipe, and the confluence port is connected to the water outlet port through a pipe, so that the sandwich layer is formed as a water jacket.

2. A recirculating chiller for nitrogen as defined in claim 1, wherein: The water inlet is located at the bottom of the water jacket, the water outlet is located at the top of the water jacket, and the inlet end of the cooling pipe is lower than the outlet end of the cooling pipe, so that the cooling water in the cooling pipe and the water jacket flows from bottom to top.

3. A recirculating chiller for nitrogen as defined in claim 1, wherein: The inner cavity is provided with an installation port that communicates with the outside. The cooling pipe is provided with two baffles that are adapted to the inner cavity. The two baffles are respectively located at both ends of the cooling branch pipe. When the cooling pipe is installed in the inner cavity, the baffles fit against the water jacket, so that the space between the baffles forms the cooling cavity.

4. A recirculating chiller for nitrogen as defined in claim 3, wherein: The mounting port is also provided with a cover plate, which covers the mounting port to seal the inner cavity; the inlet and outlet ends of the cooling pipe pass through the cover plate from the inside to the outside, so that the branch port and the junction port are exposed.

5. A recirculating chiller for nitrogen as claimed in claim 4, characterized in that: The inner cavity is also provided with a heat insulation plate, the outer periphery of which is fitted with the inner periphery of the mounting port, and the outer end face of the heat insulation plate abuts against the cover plate.

6. A circulating cooler for nitrogen according to claim 1, characterized in that: The cooling branch pipes of adjacent heat exchange networks are arranged in an alternating manner, so that the projections of the cooling branch pipes of adjacent heat exchange networks on the projection plane parallel to the heat exchange network do not overlap.

7. A recirculating chiller for nitrogen as defined in claim 1, wherein: Both the nitrogen inlet and the nitrogen outlet are equipped with connecting flanges, and the outer end face of the connecting flange is also equipped with a sealing groove. When the circulating cooler is connected to external equipment, an independently set sealing unit is installed in the sealing groove.

8. A recirculating chiller for nitrogen as defined in claim 1, wherein: The radial dimensions of the nitrogen inlet and nitrogen outlet are smaller than the radial dimensions of the cooling chamber.

9. A recirculating chiller for nitrogen as defined in claim 1, wherein: The inlet, outlet, branch outlet, and confluence outlet are all equipped with internal threads.

10. A recirculating chiller for nitrogen as defined in claim 1, wherein: The shell is also equipped with multiple lifting rings.

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