Water-cooled heat shield

Abstract

The invention relates to the technical field of crystal cooling, in particular to a water-cooling heat shield which comprises a shell, a heat shield body, a heat shield cover and a heat shield cover. The water cooling unit is configured in the accommodating space; the water cooling unit comprises two end heads which are arranged above the containing space, and a water cooling unit which is arranged in the containing space, the input pipe assembly is arranged in the lower area of the containing space, and the input pipe assembly extends upwards to be communicated with the first end; the output pipe assembly is communicated with the second end; the coiled pipe assembly is arranged in the containing space, and the two ends of the coiled pipe assembly communicate with the input pipe assembly and the output pipe assembly correspondingly. At least one of the input pipe assembly, the coiled pipe assembly and the output pipe assembly is formed by bending a pipe body. The technical problem that the cooling water leakage risk exists in the water-cooling heat shield is solved, and the technical effect of reducing the water leakage risk of the water-cooling heat shield is achieved.

Description

Technical Field

[0001] The present application relates to the field of crystal cooling technology, and in particular to a water-cooled heat shield. Background Art

[0002] After the ingot is formed and pulled out of the silicon liquid, its surface temperature is very high. To increase the growth rate of the ingot, a water-cooled heat shield is added to accelerate the cooling of the ingot. The water-cooled heat shield removes heat from the ingot surface through a large flow of cooling water, thereby cooling the ingot surface.

[0003] The water-cooling unit in the existing water-cooled heat shield adopts a multi-tube welding process, resulting in annular welds in multiple positions of the water-cooling unit. For the water-cooled heat shield with a large flow of cooling circulating water inside, the more welding gaps there are, the greater the risk of internal cooling water leakage.

[0004] Therefore, the technical problem of the prior art is that the water-cooled heat shield has the risk of cooling water leakage. Summary of the Invention

[0005] The present application provides a water-cooled heat screen, which solves the technical problem of the risk of cooling water leakage in the water-cooled heat screen, and achieves the technical effect of reducing the risk of water leakage in the water-cooled heat screen.

[0006] This application provides a water-cooled heat shield, which adopts the following technical solutions:

[0007] A water-cooled heat shield, comprising: a shell having a accommodating space; a water-cooling unit, wherein the water-cooling unit is arranged in the accommodating space; the water-cooling unit comprises: an end head, wherein the end head is arranged above the accommodating space, and two end heads are provided; an input pipe assembly, wherein the input pipe assembly is arranged in the lower area of the accommodating space, and the input pipe assembly extends upward to connect to the first end head; an output pipe assembly, wherein the output pipe assembly is connected to the second end head; and a coiled pipe assembly, wherein the coiled pipe assembly is arranged in the accommodating space, and the two ends of the coiled pipe assembly are respectively connected to the input pipe assembly and the output pipe assembly; wherein at least one of the input pipe assembly, the coiled pipe assembly and the output pipe assembly is formed by bending a pipe body.

[0008] Preferably, the coiled tube assembly is arranged reciprocatingly along the axial direction of the accommodating space; or the coiled tube assembly is arranged reciprocatingly along the circumferential direction of the accommodating space; or the coiled tube assembly is arranged reciprocatingly along the axial direction and the circumferential direction of the accommodating space alternately.

[0009] Preferably, the path in which the coiled tube assembly is arranged alternately and reciprocally along the axial direction and the circumferential direction of the accommodating space is: the coiled tube assembly is coiled along the circumferential direction of the accommodating space; when the coiled tube assembly has no circumferential coiling space, the coiled tube assembly extends along the axial direction of the accommodating space and returns to the top of the previous circumferential coiling, thereby obtaining a circumferential coiling space; after repeating the above arrangement path multiple times, the coiled tube assembly approaches and connects to the output tube assembly.

[0010] Preferably, the coiled tube assembly includes: a filling tube body, which is divided into several sections, and several sections of the filling tube body are arranged along the axial direction of the accommodating space, or several sections of the filling tube body are arranged along the circumferential direction of the accommodating space; a reversing tube body, which connects two adjacent sections of the filling tube body, or the reversing tube body connects the filling tube body and the input tube assembly / the output tube assembly.

[0011] Preferably, when several sections of the filling tube body are arranged along the circumferential direction of the accommodating space, the reversing tube body includes: a turning portion, the turning angle of the turning portion is ≥120°, and the turning portion is above the connected filling tube body; a connecting portion, the connecting portion is located below the turning portion relative to the axial direction of the accommodating space, so that the connecting portion serves as an extension section of the turning portion to connect with the filling tube body.

[0012] Preferably, a plurality of the reversing tube bodies are provided, and the turning portions of the plurality of the reversing tube bodies are provided in the upper area of the accommodating space.

[0013] Preferably, the coiled tube assembly is provided in several groups, wherein the filling tube bodies between different groups are nested and the turning parts between different groups are arranged side by side.

[0014] Preferably, the coiled tube assembly is provided with two groups, and the relative areas of the two groups of coiled tube assemblies are respectively provided with a first reversing tube body and a second reversing tube body; wherein, the first turning portion and the second turning portion are staggered and arranged side by side along the radial direction of the accommodating space; the first reversing tube body has a first turning gap, one end of the second connecting portion of the second reversing tube body is connected to the second turning portion, and the other end of the second connecting portion extends toward the first turning gap and extends toward the corresponding filling tube body in the first turning gap.

[0015] Preferably, the input pipe assembly includes: a second pipe body, which is arranged in the lower area of the accommodating space, the second pipe body is an annular pipe body, and the second pipe body is arranged parallel to the lower area of the accommodating space; a first pipe body, the two ends of the first pipe body are respectively connected to the first end and the second pipe body; and a third pipe body, the two ends of the third pipe body are respectively connected to the second pipe body and the coiled pipe assembly.

[0016] Preferably, the output tube assembly is arranged in the upper area of the accommodating space, and the output tube body includes: a fifth tube body, the fifth tube body is located between the output end of the coiled tube assembly and the second end head, and the coiled tube assembly and the second end head are connected through the fifth tube body.

[0017] Different from the prior art, the present invention has the following beneficial effects:

[0018] At least one of the input pipe assembly, the coiled pipe assembly, and the output pipe assembly is constructed by bending the pipe body, and the number of welds is reduced by bending the pipe body; and because the bending only changes the shape of the pipe body, no splicing gaps or splicing holes are generated. Therefore, the water-cooled heat screen constructed by bending solves the technical problem of the risk of cooling water leakage in the water-cooled heat screen compared to the water-cooled heat screen welded in multiple sections, thereby achieving the technical effect of reducing the risk of water leakage in the water-cooled heat screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional distribution of the shell and the water-cooling unit in this application;

[0020] Figure 2 This is a schematic diagram of the axial structure of the water-cooled heat shield in the present application with the outer shell hidden;

[0021] Figure 3 This is a schematic diagram of the axial structure of the water cooling unit in this application;

[0022] Figure 4 yes Figure 3 Exploded view of the water cooling unit along the axial direction;

[0023] Figure 5 It is a schematic diagram of the side structure of the water cooling unit in this application;

[0024] Figure 6 This is a schematic diagram of the axial structure of another water-cooling unit in this application;

[0025] Figure 7 yes Figure 6 Exploded view of the water cooling unit along the axial direction;

[0026] Figure 8 is a schematic diagram of the side structure of the coiled tube assembly in this application;

[0027] Figure 9 It is a schematic diagram of the axial direction structure of adjacent reversing tube bodies in this application.

[0028] Description of reference numerals:

[0029] 100, housing; 11, outer housing; 12, inner housing; 200, water cooling unit; 21, inlet pipe assembly; 211, first pipe; 212, second pipe; 213, third pipe; 22, coiled pipe assembly; 22a, first coiled portion; 22b, second coiled portion; 221, filling pipe; 222, reversing pipe; 222a, first reversing pipe; 222b, second reversing pipe; 2221, turning portion; 22 21a, first turning portion; 2221b, second turning portion; 2222, connecting portion; 2222a, first connecting portion; 2222b, second connecting portion; 2223, turning gap; 2223a, first turning gap; 2223b, second turning gap; 23, output pipe assembly; 231, fourth tube body; 232, fifth tube body; 233, sixth tube body; 24, end; 24a, first end; 24b, second end. DETAILED DESCRIPTION

[0030] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application include direct and indirect connections (couplings) unless otherwise specified. In the description of this application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] In order to better understand the above technical solution, the following will be described in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0033] An embodiment of the present application provides a water-cooled heat shield, which is used to cool a newly drawn crystal ingot during ingot pulling. Whether the temperature gradient created by the water-cooled heat shield is uniform directly affects the quality of the crystal ingot.

[0034] A water-cooled heat shield, reference Figure 1 and Figure 2 The water-cooled heat shield includes a shell 100 and a water-cooling unit 200, the shell 100 has a accommodating space; the water-cooling unit 200 is arranged in the accommodating space; the water-cooling unit 200 includes an input pipe assembly 21, a coiled pipe assembly 22, an output pipe assembly 23 and an end head 24, the end head 24 is arranged above the accommodating space, and two end heads 24 are provided; the input pipe assembly 21 is arranged in the lower area of the accommodating space, and the input pipe assembly 21 extends upward to connect with the first end head 24a; the output pipe assembly 23 connects with the second end head 24b; the coiled pipe assembly 22 is arranged in the accommodating space, and the two ends of the coiled pipe assembly 22 are respectively connected to the input pipe assembly 21 and the output pipe assembly 23; wherein, at least one of the input pipe assembly 21, the coiled pipe assembly 22 and the output pipe assembly 23 is formed by bending the pipe body.

[0035] It should be noted that at least one of the input pipe assembly 21, the coiled pipe assembly 22, and the output pipe assembly 23 is formed by bending the pipe body, which can reduce the number of welds and weld seams, thereby reducing the risk of water leakage in the water-cooled heat shield. In one embodiment, the input pipe assembly 21, the coiled pipe assembly 22, and the output pipe assembly 23 are all bent and formed as a single piece, and then connected together by welding. In another embodiment, the input pipe assembly 21, the coiled pipe assembly 22, and the output pipe assembly 23 are formed by bending a single piece of pipe body, and multiple groups of these bent water cooling units 200 are provided, and multiple groups of water cooling units 200 fill the storage space to form a water-cooled heat shield. In another embodiment, the input pipe assembly 21 is formed by bending as a whole, and the coiled pipe assembly 22 is welded from multiple pipe bodies, and the input pipe assembly 21 and the coiled pipe assembly 22 are not separated by a physical structure. In other words, after a pipe body is bent to form the input pipe assembly 21, it is further bent to form a portion of the coiled pipe assembly 22, and is welded to another pipe body within the concept of the coiled pipe assembly 22.

[0036] Housing 100, reference Figure 1, serving as the contact surface between the water-cooled heat shield and the thermal field. The housing 100 comprises an outer housing 11 and an inner housing 12, with the storage space located between them. It is understood that the outer housing 11 and the inner housing 12 absorb heat, which is then removed by the water cooling unit 200 to cool the ingot. The conventional housing 100 has a frustum-shaped exterior, and the storage space, conforming to the exterior of the housing 100, expands gradually from bottom to top.

[0037] Water cooling unit 200, reference Figure 3 and Figure 6 , carrying away the heat from the shell 100 through a cooling cycle. The water cooling unit 200 can be arranged in a variety of ways in the accommodation space. The water cooling unit 200 can be divided into an end head 24, an input pipe assembly 21, an output pipe assembly 23, and a coiled pipe assembly 22 according to functional divisions. Among them, the end head 24 serves as a water inlet / outlet port. The input pipe assembly 21 and the output pipe assembly 23 are respectively connected to the two end heads 24 to realize the inlet and outlet of cooling water. The coiled pipe assembly 22 fills the remaining area of the accommodation space and connects the input pipe assembly 21 and the output pipe assembly 23. The coiled pipe assembly 22 is used to provide a path for the cooling water. Through the path, the cooling water can carry the heat from various parts of the shell 100, so that all parts of the water-cooled heat shield can be cooled.

[0038] Input pipe assembly 21, reference Figure 4 and Figure 7 , for the input of cooling water. The input pipe assembly 21 includes a first pipe body 211, a second pipe body 212, and a third pipe body 213. The second pipe body 212 is disposed in the lower area of the storage space. The second pipe body 212 is an annular pipe body and is arranged parallel to the lower area of the storage space. The two ends of the first pipe body 211 are respectively connected to the first end 24a and the second pipe body 212. The two ends of the third pipe body 213 are respectively connected to the second pipe body 212 and the coiled pipe assembly 22.

[0039] It should be noted that the reference Figure 8 The second tube body 212 is arranged parallel to the lower area of the storage space so that the water-cooled heat shield can evenly cool the crystal ingot during use. Exemplarily, the second tube body 212 is annular, with the center loop of the second tube body 212 arranged horizontally relative to the lower area of the storage space. It is understood that multiple groups of input tube assemblies 21 can be provided, with multiple groups of input tube assemblies 21 connected and arranged on the same end 24 or multiple end assemblies 24. Rather than bending a single large-diameter tube to construct a single input tube assembly 21, multiple groups of small-diameter input tube assemblies 21 are used to provide multiple cooling lines, resulting in a smaller bending radius and smaller gaps at the bends, thereby better filling the storage space.

[0040] The inlet pipe assembly 21 flows with freshly introduced cooling water, which has an optimal heat absorption capacity. The lower area of the storage space, located immediately adjacent to the crucible, is at a higher temperature than the rest of the storage space. Therefore, using the inlet pipe assembly 21 to cool the lower or bottom area of the storage space achieves optimal heat absorption.

[0041] Coiled tube assembly 22, reference Figure 4 and Figure 7 , the coiled tube assembly 22 is arranged in the area of the accommodation space except for the input tube assembly 21 and the output tube assembly 23, and is used for the flow of cooling water in the accommodation space. The coverage area of the coiled tube assembly 22 is larger than the input tube assembly 21 and the output tube assembly 23. The coiled tube assembly 22 is the main part of the water cooling unit 200 for absorbing heat. The specific coiling methods of the coiled tube assembly 22 are various, mainly meeting the three indicators of uniform cooling, smooth water circulation and no dead corners of deposition. Among them, the applicant has studied the above three indicators and designed several types of coiling structures of the coiled tube assembly 22, specifically: the coiled tube assembly 22 is reciprocatingly arranged along the axial direction (x-axis) of the accommodation space ( Figure 4 ); or the coiled tube assembly 22 is arranged reciprocatingly along the circumferential direction of the accommodation space (not shown in the figure), or the coiled tube assembly 22 is arranged reciprocatingly along the axial direction and the circumferential direction of the accommodation space ( Figure 7 ).

[0042] The coiled tube assembly 22 is arranged reciprocatingly along the axial direction of the accommodating space, the filling tube body 221 is set along the axial direction of the accommodating space, and the reversing tube body 222 is respectively arranged above and below the filling tube body 221 to connect the upper and lower ends of the filling tube body 221, so that the entire coiled tube assembly 22 constitutes a cooling passage.

[0043] The alternating reciprocating arrangement of the coiled tube assembly 22 along the axial and circumferential directions of the receiving space follows this path: the coiled tube assembly 22 coils along the circumferential direction of the receiving space; when there is no circumferential winding space, the coiled tube assembly 22 extends along the axial direction of the receiving space and folds back over the previous circumferential winding, thereby creating a circumferential winding space; after repeating this arrangement multiple times, the coiled tube assembly 22 approaches and connects to the output tube assembly 23. In other words, the filling tube body 221 is arranged along the circumferential direction of the receiving space, while the reversing tube body 222 folds back along the axial direction of the receiving space.

[0044] Regarding the reciprocating arrangement of the coiled tube assembly 22 along the circumferential direction of the accommodation space, refer to the path of the coiled tube assembly 22 alternatingly reciprocating along the axial and circumferential directions of the accommodation space. The filling tube body 221 is arranged along the circumferential direction of the accommodation space, and the reversing tube body 222 is changed from being arranged in a folded manner along the axial direction of the accommodation space to being arranged along the axial direction of the accommodation space at a short distance. The two connecting portions 2222 of the reversing tube body 222 extend circumferentially to the two sections of the filling tube body 221.

[0045] Specifically regarding the structure of the coiled tube assembly 22, the coiled tube assembly 22 includes a filling tube 221 and a reversing tube 222. The filling tube 221 is divided into several sections, with the sections arranged axially or circumferentially within the receiving space. The reversing tube 222 connects two adjacent sections of the filling tube 221, or connects the filling tube 221 with the input tube assembly 21 or the output tube assembly 23. It should be understood that the division of the filling tube 221 into several sections is merely conceptual and for ease of description. In practice, the multiple filling tube sections 221 can be substantial, including a single tube bent into several filling tube sections 221 and several reversing tube sections 222 connecting adjacent filling tube sections 221.

[0046] refer to Figure 7When several sections of filling tube bodies 221 are arranged along the circumferential direction of the accommodating space, the reversing tube body 222 includes a turning portion 2221 and a connecting portion 2222. The turning angle of the turning portion 2221 is ≥120°, and the turning portion 2221 is above the connected filling tube body 221; the connecting portion 2222 is located below the turning portion 2221 relative to the axial direction of the accommodating space, so that the connecting portion 2222 serves as an extension section of the turning portion 2221 to connect with the filling tube body 221. It can be understood that the core of the turning portion 2221 is to convert the direction of the cooling water so that the cooling water can flow to the next section of the filling tube body 221 after reversing; and the specific setting forms of the reversing tube body 222 are various. In this embodiment, the turning portion 2221 is set above the connected filling tube body 221 (the above refers to the direction from the lower area of the accommodating space toward the upper area), that is, the turning portion 2221 is located at a high position of the two sections of the filling tube body 221. The height difference is conducive to avoiding impurities and scale from being deposited on the turning portion 2221, and when the cooling water falls from the turning portion 2221, its movement speed can be increased, so that the connection between the reversing tube body 222 and the filling tube body 221 can also avoid the deposition of impurities and scale, and the cooling water can move smoothly in the filling tube body 221 after moving through the turning portion 2221. On the other hand, the turning portion 2221 is arranged above the filling tube body 221, so that the turning portion 2221 that is impacted by the cooling water when it is turned is in a convenient position for maintenance, and any abnormality of the turning portion 2221 can be detected in advance. In one embodiment, the turning angle of the turning portion 2221 is limited. By limiting the angle of the turning portion 2221, it is convenient to fill more of the accommodation space. The turning angle of the turning portion 2221 is 190° ≥ 120°. In one embodiment, corresponding to the aforementioned several sections of the filling tube body 221, a plurality of reversing tube bodies 222 are provided, and the turning portions 2221 of the plurality of reversing tube bodies 222 are arranged in the upper area of the accommodation space. The plurality of turning portions 2221 are arranged at the same height position, so as to neatly fill the vacant area in the accommodation space and reduce the difficulty of processing and assembling the bending of the coiled tube assembly 22; the preferred turning angle of the turning portion 2221 is 180°, so that the connecting portions 2222 on both sides of the turning portion 2221 can be arranged side by side.

[0047] The coiled tube assembly 22 is provided with several groups, wherein the filling tube bodies 221 between different groups are nested, and the turning parts 2221 between different groups are arranged side by side. It can be understood that the provision of several groups of coiled tube assemblies 22 is conducive to using tube bodies of suitable diameters to bend and construct parts. Due to the presence of the reversing tube body 222 in one group of coiled tube assemblies 22, the gap between the connecting parts 2222 on both sides of the reversing tube body 222 is set to just be able to embed the outer diameter of the tube body of another group of coiled tube assemblies 22. Such a setting is used to fill the accommodating space and reduce the gap, so that the cooling of the entire accommodating space is uniform after the tube body is filled. Since the filling tube bodies 221 of different groups are nested, the turning parts 2221 of different groups will interfere with each other in position, so it is designed that the turning parts 2221 of different groups are staggered and arranged side by side. For example, refer to Figure 9 There are two groups of coiled tube assemblies 22, and the relative areas of the two groups of coiled tube assemblies 22 are respectively provided with a first reversing tube body 222a and a second reversing tube body 222b; wherein, the first turning portion 2221a and the second turning portion 2221b are staggered and arranged side by side along the radial direction of the accommodating space; the first reversing tube body 222a has a first turning gap 2223a, and one end of the second connecting portion 2222b of the second reversing tube body 222b is connected to the second turning portion 2221b, and the other end of the second connecting portion 2222b extends toward the first turning gap 2223a and extends toward the corresponding filling tube body 221 in the first turning gap 2223a.

[0048] Output pipe assembly 23, reference Figure 4 and Figure 7 , used for outputting cooling water. The output pipe assembly 23 is arranged in the upper area of the accommodation space, and the output pipe body includes a fourth pipe body 231, a fifth pipe body 232 and a sixth pipe body 233. The fourth pipe body 231 connects the output end of the coiled pipe assembly 22 and the first end of the fifth pipe body 232, and the sixth pipe body 233 connects the second end 24b and the second end of the fifth pipe body 232. The fifth pipe body 232 is used to connect the coiled pipe assembly 22 and the second end 24b, and to fill the area where the coiled pipe assembly 22 is not convenient to coil (mainly the upper area of the accommodation space), refer to Figure 5 The second coiled portion 22b leaves a certain space in the upper area of the accommodating space relative to the first coiled portion 22a, so that the fifth tube body 232 can extend to the second end 24b after connecting to the coiled tube assembly 22.

[0049] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0050] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A water-cooled heat shield, characterized in that: The water-cooled heat shield comprises: A housing (100), wherein the housing (100) has a receiving space; A water cooling unit (200), the water cooling unit (200) being arranged in the accommodation space; the water cooling unit (200) comprising: An end head (24), the end head (24) being arranged above the accommodation space, and two end heads (24) are provided; an input pipe assembly (21), the input pipe assembly (21) being arranged in a lower area of the accommodating space, and the input pipe assembly (21) extending upward to communicate with the first end (24a); an output pipe assembly (23), the output pipe assembly (23) being connected to the second end (24b); and a coiled tube assembly (22), the coiled tube assembly (22) being arranged in the accommodation space, and two ends of the coiled tube assembly (22) being respectively connected to the input tube assembly (21) and the output tube assembly (23); Wherein, at least one of the input pipe assembly (21), the coiled pipe assembly (22) and the output pipe assembly (23) is formed by bending a pipe body.

2. The water-cooled heat shield according to claim 1, characterized in that: The coiled tube assembly (22) is arranged back and forth along the axial direction of the accommodating space; or the coiled tube assembly (22) is arranged back and forth along the circumferential direction of the accommodating space, or the coiled tube assembly (22) is arranged back and forth alternately along the axial direction and the circumferential direction of the accommodating space.

3. The water-cooled heat shield according to claim 2, characterized in that: The path of the coiled tube assembly (22) being alternately arranged in the axial direction and the circumferential direction of the accommodation space is: The coiled tube assembly (22) is coiled along the circumferential direction of the accommodation space; When the coiled tube assembly (22) has no circumferential coiling space, the coiled tube assembly (22) extends along the axial direction of the accommodation space and folds back to the top of the previous circumferential coiling, thereby obtaining a circumferential coiling space; After repeating the above arrangement path several times, the coiled tube assembly (22) approaches and is connected to the output tube assembly (23).

4. The water-cooled heat shield according to claim 1, characterized in that: The coiled tube assembly (22) comprises: A filling tube body (221), the filling tube body (221) is divided into a plurality of sections, the plurality of sections of the filling tube body (221) are arranged along the axial direction of the accommodation space, or the plurality of sections of the filling tube body (221) are arranged along the circumferential direction of the accommodation space; A reversing tube (222), wherein the reversing tube (222) is connected to two adjacent sections of the filling tube (221), or the reversing tube (222) is connected to the filling tube (221) and the input tube assembly (21) / the output tube assembly (23).

5. The water-cooled heat shield according to claim 4, characterized in that: In the case where several sections of the filling tube body (221) are arranged along the circumferential direction of the accommodation space, the reversing tube body (222) includes: A turning portion (2221), wherein the turning angle of the turning portion (2221) is ≥120°, and the turning portion (2221) is located above the connected filling tube body (221); A connecting portion (2222), wherein the connecting portion (2222) is located below the turning portion (2221) relative to the axial direction of the accommodating space, so that the connecting portion (2222) serves as an extension section of the turning portion (2221) to connect with the filling tube body (221).

6. The water-cooled heat shield according to claim 5, characterized in that: A plurality of the reversing tube bodies (222) are provided, and the turning portions (2221) of the plurality of the reversing tube bodies (222) are provided in the upper area of the accommodating space.

7. The water-cooled heat shield according to claim 5, characterized in that: The coiled tube assembly (22) is provided in a plurality of groups, wherein the filling tube bodies (221) between different groups are nested, and the turning portions (2221) between different groups are arranged side by side.

8. The water-cooled heat shield according to claim 7, characterized in that: The coiled tube assembly (22) is provided in two groups, and the opposite areas of the two groups of coiled tube assemblies (22) are respectively provided with a first reversing tube body (222a) and a second reversing tube body (222b); In which, the first turning portion (2221a) and the second turning portion (2221b) are staggered and arranged side by side along the radial direction of the accommodating space; the first reversing tube body (222a) has a first turning gap (2223a), one end of the second connecting portion (2222b) of the second reversing tube body (222b) is connected to the second turning portion (2221b), and the other end of the second connecting portion (2222b) extends toward the first turning gap (2223a) and extends toward the corresponding filling tube body (221) in the first turning gap (2223a).

9. The water-cooled heat shield according to claim 1, characterized in that: The inlet pipe assembly (21) comprises: a second tube (212), the second tube (212) being arranged in the lower area of the accommodation space, the second tube (212) being an annular tube, and the second tube (212) being arranged parallel to the lower area of the accommodation space; a first tube body (211), wherein both ends of the first tube body (211) are respectively connected to the first end head (24a) and the second tube body (212); and A third tube body (213), two ends of which are respectively connected to the second tube body (212) and the coiled tube assembly (22).

10. The water-cooled heat shield according to claim 1, characterized in that: The output pipe assembly (23) is arranged in the upper area of the accommodating space, and the output pipe body comprises: A fifth tube body (232) is located between the output end of the coiled tube assembly (22) and the second end head (24b), and the coiled tube assembly (22) and the second end head (24b) are connected via the fifth tube body (232).

Images