Cooling device

Abstract

The utility model discloses a cooling device which comprises an inner pipeline, an outer pipeline, a cold shield and a cooling pipeline, and the inner pipeline is used for conveying a flowing medium; the outer pipeline sleeves the outer side of the inner pipeline; the cold shield is arranged between the inner pipeline and the outer pipeline, the cold shield is arranged on the outer side of part of the inner pipeline in a sleeving mode, and a limiting groove extending in the axial direction is formed in the outer surface of the cold shield; the cooling pipeline is arranged between the cold screen and the outer pipeline, at least part of the cooling pipeline is arranged in the limiting groove, and the cooling pipeline is used for conveying a cooling medium. The cold shield and the cooling pipeline are arranged between the inner pipeline and the outer pipeline, so that when a cooling medium flows in the cooling pipeline, the flowing medium in the inner pipeline can be pre-cooled through the cold shield, and the overall cooling efficiency is improved. Meanwhile, due to the arrangement of the limiting grooves, the cooling pipeline can be attached to the cold shield more tightly, gaps in the heat transfer process are reduced, and therefore the heat conduction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cooling, particularly to a cooling device. BACKGROUND

[0002] In the running process of the existing low-temperature system, liquid helium is used to complete the cooling infusion of the thermostat through the pipeline, thereby reducing the cold loss of the low-temperature thermostat. However, for a slightly long low-temperature pipeline, the cold loss is large, and in the process of repeated shutdown adjustment, the equipment and the pipeline need to be pre-cooled each time the machine is started, which is low in cooling efficiency and high in cost. SUMMARY

[0003] The technical problem solved by the present application is to provide a cooling device that can improve the low cooling efficiency.

[0004] To solve the above technical problems, one technical scheme adopted by the present application is to provide a cooling device, which comprises an inner pipeline, an outer pipeline, a cold screen and a cooling pipeline. The inner pipeline is used to transport flowing medium. The outer pipeline is sleeved on the outer side of the inner pipeline. The cold screen is arranged between the inner pipeline and the outer pipeline, and is sleeved on the outer side of part of the inner pipeline. The outer surface of the cold screen is provided with an axially extending limiting groove. The cooling pipeline is arranged between the cold screen and the outer pipeline, and is at least partially arranged in the limiting groove. The cooling pipeline is used to transport cooling medium.

[0005] Beneficial effects: The present application sets a cold screen and a cooling pipeline between the inner pipeline and the outer pipeline, so that when the cooling medium flows in the cooling pipeline, the cold screen can pre-cool the flowing medium in the inner pipeline, thereby improving the overall cooling efficiency. At the same time, the setting of the limiting groove makes the cooling pipeline more closely adhere to the cold screen, reduces the gap in the heat transfer process, and improves the heat conduction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0007] Figure 1 The structural schematic diagram of the cooling device provided by an embodiment of the present application is shown in the figure;

[0008] Figure 2 The internal structure schematic diagram of the cooling device provided by an embodiment of the present application is shown in the figure;

[0009] Figure 3 For Figure 2Schematic diagram of exploded structure of the intermediate cooling device;

[0010] Figure 4 Schematic diagram of connecting mechanism of inner pipe, cold shield and cooling pipe provided by an embodiment of the present application;

[0011] Figure 5 Schematic diagram of structure of the first support ring and the second support ring provided by an embodiment of the present application;

[0012] Figure 6 Schematic diagram of structure of the temperature sensor provided by an embodiment of the present application. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0014] The terms “first”, “second”, “third” in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second”, “third” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “plurality” is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, the process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0015] In this document, reference to “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those skilled in the art will understand that the embodiments described herein can be combined with other embodiments.

[0016] Please refer toFigure 1 、 Figure 2 、 Figure 3 and Figure 4 In an embodiment of the present application, a cooling device 100 is provided, which comprises an inner pipe 10, an outer pipe 20, a cold shield 30 and a cooling pipe 40. The inner pipe 10 is used to transport a flowing medium (not shown in the figure). The outer pipe 20 is sleeved on the outer side of the inner pipe 10. The cold shield 30 and the cooling pipe 40 are arranged between the inner pipe 10 and the outer pipe 20 to pre-cool the inner pipe 10 and reduce the heat transferred from the external environment through the outer pipe 20, thereby improving the cooling effect.

[0017] Specifically, the cold shield 30 is arranged between the inner pipe 10 and the outer pipe 20, and is sleeved on the outer side of part of the inner pipe 10. The outer surface of the cold shield 30 is provided with an axially extending limiting groove 31. The cooling pipe 40 is arranged between the cold shield 30 and the outer pipe 20, and is at least partially arranged in the limiting groove 31. The cooling pipe 40 is used to transport a cooling medium (not shown in the figure).

[0018] The cold shield 30 can be used to weaken the influence of the external temperature on the inside of the outer pipe 20, thereby reducing the heat leakage. Meanwhile, the cold shield 30 also functions as a heat bridge, which can guide the heat transferred from the outside to the cooling pipe 40 for heat dissipation. The outer surface of the cold shield 30 is provided with the axially extending limiting groove 31, which not only provides positioning for the arrangement of the cooling pipe 40, but also enhances the heat transfer efficiency between the cold shield 30 and the cooling pipe 40. The main function of the cooling pipe 40 is to transport a cooling medium, such as a cooling liquid or a cooling gas, to absorb and carry away the heat transferred by the cold shield 30.

[0019] In the above cooling device 100, by arranging the cold shield 30 and the cooling pipe 40 between the inner pipe 10 and the outer pipe 20, when the cooling medium flows in the cooling pipe 40, the flowing medium in the inner pipe 10 can be pre-cooled by the cold shield 30, thereby improving the overall cooling efficiency. Meanwhile, the arrangement of the limiting groove 31 enables the cooling pipe 40 to be more closely attached to the cold shield 30, reducing the gap in the heat transfer process, thereby improving the heat conduction efficiency.

[0020] In an embodiment, the flowing medium in the inner pipe 10 comprises liquid helium. At this time, the cold shield 30 in cooperation with the cooling medium in the cooling pipe 40 can pre-cool the liquid helium in the inner pipe 10 while weakening the influence of the external temperature on the liquid helium in the inner pipe 10.

[0021] It can be understood that the cooling medium in the cooling pipe 40 can be synchronously transported when the flowing medium in the inner pipe 10 is transported, or the cooling medium in the cooling pipe 40 can be transported in advance before the flowing medium in the inner pipe 10 is transported, thereby effectively saving energy consumption and reducing the cooling cost for the system.

[0022] In other embodiments, the flowing medium in the inner conduit 10 can also include high-temperature medium. At this time, the cold shield 30 cooperated with the cooling medium in the cooling conduit 40 can be used to cool the inner conduit 10.

[0023] In an embodiment, the environment between the inner conduit 10 and the outer conduit 20 is a vacuum environment.

[0024] In an embodiment, the material of the cold shield 30 includes copper, and the material of the cooling conduit 40 includes stainless steel, and other materials can also be used, which are not limited herein.

[0025] In an embodiment, the cooling medium in the cooling conduit 40 includes liquid nitrogen, and other cooling medium can also be used, which is not limited herein.

[0026] In an embodiment, the outer side of the inner conduit 10 is further wrapped with a thermal insulation layer (not shown in the figure), and the thermal insulation layer includes aluminum foil, aluminized film and polyester fiber film. The aluminum foil, aluminized film and polyester fiber film form a multi-layer thermal insulation layer, which can effectively block the heat transfer path and prevent external heat from invading the inner conduit 10.

[0027] Please continue to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 In an embodiment, the cooling device 100 further includes a first support ring 50 and a second support ring 60. The first support ring 50 is provided with a first through hole 51, and the inner conduit 10 passes through the first support ring 50 through the first through hole 51. The cold shield 30 is sleeved on the outer side of the first support ring 50. The second support ring 60 is provided with a second through hole 61, and the cold shield 30 passes through the second support ring 60 through the second through hole 61. The outer conduit 20 is sleeved on the outer side of the second support ring 60.

[0028] Specifically, the first support ring 50 is used to limit the position between the inner conduit 10 and the cold shield 30, so that the cold shield 30 can be fixedly installed on the outer side of the inner conduit 10, and ensure that the heat can be efficiently transferred from the cold shield 30 to the inner conduit 10, thereby enhancing the cooling effect. The second support ring 60 is used to limit the position between the outer conduit 20 and the cold shield 30, so that the cold shield 30 is fixedly installed on the outer side of the inner conduit 10 while being limited inside the outer conduit 20, and ensure that the heat passing through the outer conduit 20 can be efficiently transferred from the outer conduit 20 to the cold shield 30, thereby reducing the influence of external heat on the flowing medium in the inner conduit 10.

[0029] In an embodiment, the material of the first support ring 50 and the second support ring 60 includes glass steel (G10), and other thermal insulation materials can also be used, which are not limited herein.

[0030] In an embodiment, a plurality of first support rings 50 and second support rings 60 are provided, and the interval between two adjacent first support rings 50 and the interval between two adjacent second support rings 60 are both 800 mm. It can be understood that, according to the length of the cold shield 30 and the cooling pipe 40, the interval between two adjacent first support rings 50 and the interval between two adjacent second support rings 60 can be set to other values, which are not limited herein.

[0031] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 In an embodiment, the outer ring wall of the first support ring 50 is provided with a first notch 52 for avoiding the cooling pipe 40, and the inner ring wall of the second support ring 60 is provided with a second notch 62 for avoiding the cooling pipe 40, and the first notch 52 and the second notch 62 are arranged in the diameter direction of the cold shield 30. Through the above arrangement, the arrangement of the first notch 52 and the second notch 62 enables the cooling pipe 40 to be placed between the first support ring 50 and the second support ring 60, and at the same time, the first notch 52 and the second notch 62 can further limit the position of the cooling pipe 40, thereby improving the stability of the cooling pipe 40 between the first support ring 50 and the second support ring 60.

[0032] It can be understood that the limiting groove 31 of the cold shield 30 is recessed towards the position of the first notch 52, so that the cooling pipe 40 placed in the limiting groove 31 also corresponds to the position of the first notch 52 and the second notch 62, thereby improving the stability of the cooling pipe 40.

[0033] In an embodiment, the cooling pipe 40 and the cold shield 30 are welded. In this embodiment, the pipe wall of the cooling pipe 40 and the cold shield 30 are welded by silver brazing, which can not only fix the position of the cooling pipe 40, but also strengthen the heat conduction.

[0034] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 5In an embodiment, the hole wall of the first through hole 51 is provided with a plurality of first protrusions 53 which are arranged at intervals and surround the inner pipeline 10, and the first protrusions 53 are used to abut against the outer sidewall of the inner pipeline 10. The outer peripheral wall of the first support ring 50 is provided with a plurality of second protrusions 54 which are arranged at intervals and surround the cold screen 30, and the second protrusions 54 are used to abut against the inner sidewall of the cold screen 30. Through the above arrangement, the first protrusions 53 contact the inner pipeline 10, and the second protrusions 54 contact the cold screen 30, so that the first support ring 50 can fix the positions of the inner pipeline 10 and the cold screen 30. At the same time, the first protrusions 53 and the second protrusions 54 also optimize the heat conduction path by increasing the contact area with the inner pipeline 10 and the cold screen 30, thereby helping the heat exchange between the inner pipeline 10 and the cold screen 30 and improving the cooling effect of the cooling device 100.

[0035] In an embodiment, the end portions of the first protrusions 53 and the end portions of the second protrusions 54 are in arc-shaped structures, so that the first protrusions 53 can more closely fit the outer sidewall of the inner pipeline 10, and the second protrusions 54 can more closely fit the inner sidewall of the cold screen 30, thereby reducing the gap caused by shape mismatch and increasing the contact area of heat conduction.

[0036] Please continue to refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In an embodiment, the plurality of first protrusions 53 and the plurality of second protrusions 54 are arranged one-to-one, and the corresponding first protrusions 53 and second protrusions 54 are arranged along the diameter direction of the first support ring 50.

[0037] Through the above arrangement, a continuous and efficient heat conduction path can be formed between the inner pipeline 10, the cold screen 30 and the first support ring 50. When the flow medium is conveyed in the inner pipeline 10, the heat of the cooling medium in the cooling pipeline 40 is first transferred to the first support ring 50 through the cold screen 30 and the second protrusions 54, and then transferred to the inner pipeline 10 along the diameter direction through the first protrusions 53, so that the heat of the cooling medium pre-cools the flow medium in the inner pipeline 10. This linear heat conduction path greatly reduces the loss in the heat transfer process and improves the overall cooling efficiency.

[0038] In an embodiment, the number of the first protrusions 53 and the number of the second protrusions 54 are both three, and the entire first support ring 50 is in an axisymmetric structure, thereby reducing the risk of cracking of the first support ring 50 due to asymmetric stress shrinkage during the cooling process.

[0039] Please continue to refer to Figure 2 , Figure 3 , Figure 4 and Figure 5In an embodiment, the first support ring 50 is provided with at least one first hollow groove 55 penetrating in the axial direction. The provision of the first hollow groove 55 can reduce the weight of the first support ring 50, thereby reducing the pressure of the first support ring 50 on the inner pipe 10. At the same time, the first hollow groove 55 also plays a role in optimizing the heat conduction path. Through the design of penetrating in the axial direction, the hollow groove provides an additional transmission channel for heat, which helps the heat to be transmitted from the cold screen 30 to the inner pipe 10 more quickly, thereby further improving the cooling efficiency.

[0040] In an embodiment, the first hollow groove 55 is in an arc structure, for extending the heat bridge and reducing the risk of heat leakage.

[0041] Please continue to refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In an embodiment, the hole wall of the second through hole 61 is provided with a plurality of third protrusions 63 arranged at intervals and surrounding the cold screen 30, and the third protrusions 63 are used to abut against the outer side wall of the cold screen 30. The outer peripheral wall of the second support ring 60 is provided with a plurality of fourth protrusions 64 arranged at intervals and surrounding the outer pipe 20, and the fourth protrusions 64 are used to abut against the inner side wall of the outer pipe 20. Through the above-mentioned arrangement, the third protrusions 63 contact the cold screen 30, and the fourth protrusions 64 contact the outer pipe 20, so that the second support ring 60 can fix the positions of the cold screen 30 and the outer pipe 20. At the same time, the third protrusions 63 and the fourth protrusions 64 also optimize the heat conduction path by increasing the contact area with the cold screen 30 and the outer pipe 20, thereby helping the heat exchange between the cold screen 30 and the outer pipe 20 and improving the cooling effect of the cooling device 100.

[0042] In an embodiment, the end portion of the third protrusion 63 contacting the cold screen 30 and the end portion of the fourth protrusion 64 contacting the outer pipe 20 are both in an arc structure, so that the third protrusion 63 can more closely fit the outer side wall of the cold screen 30, and the fourth protrusion 64 can more closely fit the inner side wall of the outer pipe 20, thereby reducing the gap caused by the shape mismatch and increasing the contact area of heat conduction.

[0043] Please continue to refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In an embodiment, the plurality of third protrusions 63 and the plurality of fourth protrusions 64 are arranged one by one in correspondence, and the corresponding third protrusions 63 and fourth protrusions 64 are arranged along the diameter direction of the second support ring 60.

[0044] By the above arrangement, a continuous and efficient heat conduction path can be ensured between the outer pipe 20, the cold shield 30 and the second support ring 60. When the heat from the external environment enters the outer pipe 20, it will be quickly transmitted to the second support ring 60 through the fourth protrusions 64, then transmitted to the cold shield 30 along the diameter direction through the third protrusions 63, and then guided to the cooling pipe 40 for heat dissipation. Such a linear heat conduction path greatly reduces the loss in the heat transfer process and improves the overall thermal efficiency.

[0045] In an embodiment, the number of third protrusions 63 and fourth protrusions 64 is 4, and the entire second support ring 60 is in an axisymmetric structure, thereby reducing the risk of cracking of the second support ring 60 due to asymmetric stress shrinkage during cooling.

[0046] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In an embodiment, the second protrusions 54 of the outer sidewall of the first support ring 50 and the third protrusions 63 of the inner sidewall of the second support ring 60 are staggered with each other. The above arrangement can effectively reduce the risk of direct collision or interference between the first support ring 50 and the second support ring 60, thereby reducing the stress concentration and deformation caused by structural conflicts. At the same time, the staggered second protrusions 54 and third protrusions 63 enable the first support ring 50 and the second support ring 60 to more evenly distribute stress when bearing the weight and pressure of the inner pipe 10, the outer pipe 20, the cold shield 30 and the cooling pipe 40, etc., thereby improving the stability and reliability of the entire cooling device 100.

[0047] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In an embodiment, the second support ring 60 is provided with at least one second hollow groove 65 penetrating in the axial direction. The arrangement of the second hollow groove 65 can reduce the weight of the second support ring 60, thereby reducing the pressure of the second support ring 60 on the cold shield 30. At the same time, the second hollow groove 65 also plays a role in optimizing the heat conduction path. By the design of penetrating in the axial direction, the hollow groove provides an additional transmission channel for heat, which helps the heat to be transmitted from the outer pipe 20 to the cold shield 30 more quickly, thereby further improving the cooling efficiency.

[0048] In an embodiment, the second hollow groove 65 is in an arc structure, for extending the heat bridge and reducing the risk of heat leakage.

[0049] Please refer to Figure 2 , Figure 3 and Figure 4 Figure 5 Figure 2 Figure 3 Figure 4 Figure 5 Figure 2 Figure 3 Figure 4 Figure 5 Figure 2 Figure 3 Figure 4 Figure 5 Figure 2 Figure 3 Figure 4 Figure 5 Figure 2 Figure 3 Figure 4 Figure 5 Figure 2 Figure 3 Figure 4 Figure 5 FigureIn one embodiment, the cooling device 100 further comprises a cooling pipe inlet 70, a cooling pipe outlet 80 and a temperature sensor 90. The cooling pipe inlet 70 is arranged at one end of the outer pipe 20 and communicates with the first end of the cooling pipe 40. The cooling pipe outlet 80 is arranged at the other end of the outer pipe 20 and communicates with the other end of the cooling pipe 40. The temperature sensor 90 is arranged at the cooling pipe outlet 80 and adheres to the outer wall of the cooling pipe 40.

[0050] Specifically, the cooling pipe inlet 70 allows the cooling medium to enter the cooling pipe 40 from the outside, starting its cooling cycle. After the cooling medium completes the cooling cycle, it exits the cooling pipe 40 from the cooling pipe outlet 80, ensuring smooth operation of the entire cooling system. At the same time, the temperature sensor 90 arranged at the cooling pipe outlet 80 can evaluate the cooling effect of the cooling medium. The temperature sensor 90 can monitor the temperature of the cooling pipe outlet 80. By the change of the value of the temperature sensor 90, the temperature condition of the cooling medium in the cooling pipe 40 can be confirmed, so as to ensure the normal operation of the pre-cooling process of the cooling pipe 40.

[0051] In one embodiment, the temperature sensor 90 is adhered to the outer wall of the cooling pipe 40 through a mounting seat (not shown) and is fixed by silver brazing, further increasing the heat conduction effect.

[0052] In one embodiment, the cold screen 30 and the cooling pipe 40 adhere to each other. When the cooling medium (such as liquid nitrogen) is introduced into the cooling pipe 40, the cold energy will be dissipated along the pipe wall of the cooling pipe 40 and the entire cold screen 30. With continuous supply of the cooling medium, an 80K cold cavity is formed to weaken the influence of the external temperature on the inside of the outer pipe 20, thereby achieving the effect of reducing heat leakage.

[0053] If the cold cavity is formed before the inner pipe 10 is introduced into the flowing medium (such as liquid helium), it can effectively save energy for the system and reduce experimental costs. When the outer pipe 20 does not have the cold screen 30, the overall system needs to be cooled from room temperature 300K to 4.5K, and the cold energy required is supplied by the flowing medium. In the case of the cold screen 30, the cold energy of 300K-80K is provided by the cooling medium, and only the interval of 80K-4.5K is supplied by the flowing medium.

[0054] In addition, when the temperature sensor 90 at the cooling pipe outlet 80 reads 80K, it proves that the pre-cooling system of the cooling medium is running well. When the temperature sensor 90 reads more than 80K, it means that the pre-cooling has not reached the best effect, and the amount of cooling medium needs to be increased, so as to improve the cooling efficiency of the entire cooling device 100.

[0055] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. Cooling device, characterized in that The cooling device comprises: an inner pipe for conveying a flowing medium; an outer pipe sleeved outside the inner pipe; a cold shield arranged between the inner pipe and the outer pipe, and the cold shield is sleeved outside part of the inner pipe, and an outer surface of the cold shield is provided with an axially extending limiting groove; a cooling pipe arranged between the cold shield and the outer pipe, and at least partially arranged in the limiting groove, and the cooling pipe is used for conveying a cooling medium.

2. Cooling device according to claim 1, characterized in that The cooling device further comprises: a first support ring provided with a first through hole, and the inner pipe passes through the first support ring through the first through hole, and the cold shield is sleeved outside the first support ring; a second support ring provided with a second through hole, and the cold shield passes through the second support ring through the second through hole, and the outer pipe is sleeved outside the second support ring.

3. Cooling device according to claim 2, characterized in that An outer ring wall of the first support ring is provided with a first notch for avoiding the cooling pipe, and an inner ring wall of the second support ring is provided with a second notch for avoiding the cooling pipe, and the first notch and the second notch are arranged in a diameter direction of the cold shield.

4. Cooling device according to claim 2, characterized in that A hole wall of the first through hole is provided with a plurality of first protrusions arranged at intervals and surrounding the inner pipe, and the first protrusions are used for abutting against an outer side wall of the inner pipe; and an outer peripheral wall of the first support ring is provided with a plurality of second protrusions arranged at intervals and surrounding the cold shield, and the second protrusions are used for abutting against an inner side wall of the cold shield.

5. Cooling device according to claim 4, characterized in that The plurality of first protrusions and the plurality of second protrusions are arranged one by one in a corresponding manner, and the corresponding first protrusions and second protrusions are arranged along a diameter direction of the first support ring.

6. The cooling device of claim 2, wherein The first support ring is provided with at least one first hollow groove penetrating in an axial direction.

7. The cooling device of claim 2, wherein A hole wall of the second through hole is provided with a plurality of third protrusions arranged at intervals and surrounding the cold shield, and the third protrusions are used for abutting against an outer side wall of the cold shield; and an outer peripheral wall of the second support ring is provided with a plurality of fourth protrusions arranged at intervals and surrounding the outer pipe, and the fourth protrusions are used for abutting against an inner side wall of the outer pipe.

8. Cooling device according to claim 7, characterized in that The plurality of third protrusions and the plurality of fourth protrusions are arranged one by one in a corresponding manner, and the corresponding third protrusions and fourth protrusions are arranged along a diameter direction of the second support ring.

9. The cooling device of claim 2, wherein, The second support ring is provided with at least one second hollow groove penetrating in an axial direction.

10. The cooling device of claim 1, wherein, The cooling device further comprises: a cooling pipe inlet arranged at one end of the outer pipe and in communication with a first end of the cooling pipe; a cooling pipe outlet arranged at the other end of the outer pipe and in communication with the other end of the cooling pipe; a temperature sensor arranged at the cooling pipe outlet and abutting against an outer side wall of the cooling pipe.

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