A method for connecting segmented nozzles

Abstract

The present invention provides a connection method for a segmented nozzle. The segmented nozzle is divided into several segments along the axial direction of the nozzle. A cooling channel formed by an inner wall, longitudinal ribs, and an outer wall of the nozzle can enable the back-and-forth flow of a coolant. The method includes: Step S1, docking the docking surfaces of an adjacent first segmented nozzle and a second segmented nozzle. After docking, the docked part forms a U-shaped docking opening, and positioning protrusions are arranged at the ribs of the U-shaped docking opening; Step S2, installing a plurality of clamping ribs with clamping grooves onto the positioning protrusions one by one to cover the U-shaped docking opening, and welding the docking surfaces of the clamping ribs one by one to complete the connection of the segmented nozzle. This connection method is simple to operate and has a low manufacturing cost.

Description

Technical Field

[0001] The invention relates to the field of aerospace engines, and in particular to a segmented nozzle connection method. Background Art

[0002] Aerospace engine-related technologies have also developed rapidly with the rapid development of the aerospace industry. As the main component of the engine, the thrust chamber is a key component that completes the energy conversion of the propellant and generates thrust. In order to withstand the high temperature of the gas, the nozzle of the main thrust component usually adopts regenerative cooling technology, which consists of inner and outer walls and cooling channels. The main function of the thrust chamber nozzle is to accelerate the ejection of the high-temperature airflow, so that the thrust chamber generates reverse thrust.

[0003] Large reciprocating flow nozzles require integrated processing of cooling channels to achieve reciprocating flow, that is, they cannot be segmented in the middle, otherwise it will cause a short circuit of the reciprocating flow medium, resulting in cooling failure. Therefore, the cooling channels of the reciprocating flow nozzles must be completely isolated and require integrated manufacturing. Large molds and processing equipment as well as high precision requirements have greatly increased the difficulty and cost of manufacturing large nozzles.

[0004] In view of this, it is urgent to design a low-cost and easy-to-operate segmented nozzle connection method. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a segmented nozzle connection method.

[0006] The present invention provides a method for connecting a segmented nozzle, wherein the segmented nozzle is divided into a plurality of segments along the axial direction of the nozzle, and a cooling channel composed of an inner wall, longitudinal ribs and an outer wall of the nozzle can realize the back and forth flow of a coolant, and the method comprises:

[0007] Step S1, butting the butt joint surfaces of the adjacent first segmented nozzle and the second segmented nozzle, so that the butt joint portions form a U-shaped butt joint, and providing a positioning protrusion at the rib of the U-shaped butt joint;

[0008] Step S2, installing a plurality of locking ribs with locking grooves onto the positioning protrusions one by one to cover the U-shaped docking interface, and welding the docking surfaces of the locking ribs one by one to complete the segmented nozzle connection.

[0009] According to one embodiment of the present invention, in step S1: the U-shaped docking interface is formed by setting the outer wall and ribs into a circular U shape with the inner wall as the bottom surface, and the docking surfaces of the first segmented nozzle and the second segmented nozzle are symmetrically arranged into a semi-U shape.

[0010] According to an embodiment of the present invention, in step S1: the positioning protrusion provided at the center of the rib of the U-shaped docking port is semi-U-shaped, and both the first positioning protrusion of the first segmented nozzle and the second positioning protrusion of the second segmented nozzle are at a certain distance from the inner wall docking line.

[0011] According to an embodiment of the present invention, in step S1: the U-shaped docking port is provided with a transition fillet, and the range of the transition fillet is R0.5 - 2 mm.

[0012] According to an embodiment of the present invention, in step S2: the clamping rib is integrally L-shaped, divided into a first side and a second side. The first side is used to cover the upper part of the U-shaped docking port and is set as a square, and the second side is used to cover the side of the U-shaped docking port and is set as a U-shape. After the clamping rib covers the U-shaped docking port, the first side smoothly transitions with the outer walls of the first segmented nozzle and the second segmented nozzle.

[0013] According to an embodiment of the present invention, in step S2: the thickness of the first side is the thickness of the outer wall, and the thickness of the second side is the thickness of the rib.

[0014] According to an embodiment of the present invention, in step S2: both ends of the first side of the clamping rib are in the form of lapping platforms, and the lapping platforms are divided into a first lapping surface and a second lapping surface. After adjacent two clamping ribs are docked, the first lapping surface and the adjacent second lapping surface lap with each other.

[0015] According to an embodiment of the present invention, in step S2: two slots are provided below the second side of the clamping rib, and the two slots are used to respectively embed the first positioning protrusion and the second positioning protrusion during the process of installing the clamping rib to the U-shaped docking port.

[0016] According to an embodiment of the present invention, before step S2: first weld the inner wall connection seam after the first segmented nozzle and the second segmented nozzle are docked.

[0017] According to an embodiment of the present invention, in step S2: after installing one clamping rib, weld the second side to the rib along the U-shaped path where the clamping rib and the positioning protrusion cooperate with each other. Then, after installing the adjacent clamping rib, also weld the second side to the corresponding rib along the U-shaped path. Then, weld the connection seam of the first sides of the two clamping ribs. Repeat this step until all the clamping ribs are installed and welded. Finally, weld the connection seams between all the clamping ribs and the first segmented nozzle and the second segmented nozzle.

[0018] The connection method of the segmented nozzle in this application realizes the restoration of all flow paths by adding modular micro-positioning ribs, installing multiple positioning ribs with card slots one by one onto the positioning protrusions to cover the U-shaped docking interface, and reconstructing the back-and-forth flow cooling channel after welding the positioning ribs one by one. Moreover, the connection method of the segmented nozzle in this application ensures that the function of the coolant flowing back and forth is not affected, changing the original large back-and-forth flow nozzle from integral manufacturing to segmented manufacturing, greatly reducing the processing difficulty and cost.

[0019] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and cannot limit the scope claimed by the present invention. Brief Description of the Drawings

[0020] The following drawings are part of the specification of the present invention, which illustrate exemplary embodiments of the present invention. The attached drawings, together with the description of the specification, are used to explain the principles of the invention.

[0021] Figure 1 It is a schematic diagram of the connection method of the segmented nozzle according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the docking surface of two segmented nozzles according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the integral nozzle according to an embodiment of the present invention;

[0024] Figures 4a to 4d It is a schematic diagram of different sides of the positioning rib for connecting the segmented nozzle according to an embodiment of the present invention;

[0025] Figures 5 - 10 It is a schematic diagram of the connection steps of the segmented nozzle in different embodiments of the present invention.

[0026] Reference Signs:

[0027] 101 - First segmented nozzle, 102 - Second segmented nozzle, 201 - U-shaped docking interface, 202 - Positioning protrusion, 2021 - First positioning protrusion, 2022 - Second positioning protrusion, 301 - Positioning rib, 3011 - First side, 3012 - Second side, 3013 - First overlapping surface, 3014 - Second overlapping surface, 3015 - Card slot. Detailed Description of the Embodiments

[0028] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to exemplarily illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the components in the drawings are not necessarily drawn to scale. For example, the dimensions of some components or regions in the drawings may be enlarged for other components or regions to help understand the embodiments of the present invention.

[0029] The orientation terms appearing in the following description are all the directions shown in the drawings and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that unless otherwise specified, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the terms "comprising", "including", "having", or any other variants thereof are intended to cover non-exclusive inclusion, such that a structure or component including a series of elements not only includes those elements, but also includes other elements that are not explicitly listed or are inherent to the structure or component. Without further limitation, an element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the article or device including the element.

[0031] Spatial relationship terms such as "below", "beneath", "under", "lower", "above", "over", "upper", etc. are used to facilitate description to explain the positioning of one element relative to a second element and are intended to cover different orientations of the device in addition to the orientations shown in the figures. In addition, for example, "one element is on / under another element" can mean that the two elements are in direct contact or that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc. and should not be construed as limiting. Similar terms throughout the description denote similar elements.

[0032] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only provided to provide a better understanding of the present invention by showing examples of the present invention.

[0033] Figure 1 is a schematic diagram of a connection method for a segmented nozzle according to an embodiment of the present invention;Figure 2 Schematic diagram of the docking surface of two segmented nozzles according to an embodiment of the present invention; Figure 3 Schematic diagram of the overall nozzle according to an embodiment of the present invention; Figures 4a to 4d Schematic diagrams of different sides of the clamping ribs for connecting segmented nozzles according to an embodiment of the present invention; Figures 5 - 10 Schematic diagram of the connection steps of segmented nozzles in different embodiments of the present invention.

[0034] As Figures 1 to 4d shown, the present invention provides a method for connecting segmented nozzles. The segmented nozzles are divided into several segments along the axial direction of the nozzle. The cooling channel composed of the inner wall N, longitudinal ribs T, and outer wall W of the nozzle can realize the back-and-forth flow of the coolant. The method includes:

[0035] Step S1: Docking the docking surfaces of adjacent first segmented nozzle 101 and second segmented nozzle 102. After docking, the docked part forms a U-shaped docking port 201, and a positioning protrusion 202 is provided at the rib T of the U-shaped docking port 201;

[0036] Step S2: Installing a plurality of clamping ribs 301 with clamping grooves 3015 onto the positioning protrusion 202 one by one to cover the U-shaped docking port 201, and welding the docking surfaces of the clamping ribs 301 one by one to complete the connection of the segmented nozzles.

[0037] According to an embodiment of the present invention, in step S1: The U-shaped docking port 201 is provided with a transition fillet, and the range of the transition fillet is R0.5 - 2 mm.

[0038] Specifically, the connection method of the segmented nozzles in the present application can realize the connection of multiple segmented nozzles of the coolant back-and-forth flow nozzle through the special design and installation welding steps of the positioning protrusion 202 of the U-shaped docking port 201 and the clamping ribs 301, and ensure that the function of the coolant back-and-forth flow is not affected. The original large back-and-forth flow nozzle is changed from integral manufacturing to segmented manufacturing, greatly reducing the processing difficulty and cost.

[0039] As Figure 3As shown, the connection method of the segmented nozzle of the present application is applicable to the connection between the segmented nozzles below the liquid collector J. The coolant enters the nozzle from the medium inlet in the liquid collector J and is divided into two paths. One path goes upward to the throat for cooling and then enters the combustion chamber for combustion. The other path goes downward and flows back and forth through the cooling channels of the nozzle to complete nozzle cooling, returns to the liquid collector J, further cools the throat, and then enters the combustion chamber for combustion. The cooling channels of the nozzle are usually composed of the inner wall N, the outer wall W, and the longitudinal ribs T in the middle, or can be integrally formed by additive manufacturing or other means. According to the size of the nozzle, the process segmentation points downstream of the nozzle liquid collector J are axially designed into several segmented nozzles, and each segmented nozzle is processed separately. For example, the required number of the clamping ribs 301 at the U-shaped docking interface 201 of the segmented nozzle is the same, and the groove width is the same.

[0040] As Figure 2 shown, wherein, the size of the U-shaped docking interface 201, that is, the width and height of the U-shape, can be adjusted with the height of the cooling channel. As an example of the embodiment, the width of the U-shaped docking interface 201 can be set to 2-5 mm, and the transition fillet range of the U-shaped docking interface 201 is R0.5-2 mm.

[0041] As Figures 4a to 4d shown, in this embodiment, by adding modular micro clamping ribs 301, a plurality of clamping ribs 301 with clamping grooves 3015 are successively installed on the positioning protrusions 202 to cover the U-shaped docking interface 201. After welding the clamping ribs 301 one by one, the back-and-forth flow cooling channels are reconstructed to restore all the flow paths. This connection method ensures that the flow resistance of the cooling channel does not increase, the flow path of the cooling channel is not short-circuited, avoiding the short-flow of the coolant at the connection and losing the cooling effect, and has a relatively high bearing capacity. As an example of the embodiment, a small-energy laser can be used to weld the docking surfaces of the clamping ribs 301, so that all deformations are controllable.

[0042] As Figure 2 shown, according to an embodiment of the present invention, in step S1: the U-shaped docking interface 201 takes the inner wall N as the bottom surface, and the outer wall W and the ribs T are arranged into an annular U-shape, and the docking surfaces of the first segmented nozzle 101 and the second segmented nozzle 102 are symmetrically arranged into a semi-U-shape.

[0043] Specifically, the U-shaped docking interface 201 uses the inner wall N after the docking of the first segmented nozzle 101 and the second segmented nozzle 102 as the bottom surface. In one embodiment, turning can be used to machine an annular U-shaped groove with the same width on the outer wall W and the rib T, and then a milling cutter is used to mill and process the positioning protrusion 202 while clamping the rib T. In another embodiment, an additive manufacturing method can be adopted, and the U-shaped docking interface 201 and the positioning protrusion 202 can be made of printed segmented nozzles and directly formed in one step during printing. The docking surfaces of the first segmented nozzle 101 and the second segmented nozzle 102 are symmetrically arranged as semi-U-shaped, which is convenient for the symmetric installation and welding of the clamping rib 301 to the U-shaped docking interface 201.

[0044] According to an embodiment of the present invention, in step S1: the positioning protrusion 202 provided at the center of the rib T of the U-shaped docking interface 201 is semi-U-shaped, and both the first positioning protrusion 2021 of the first segmented nozzle 101 and the second positioning protrusion 2022 of the second segmented nozzle 102 are at a certain distance from the docking line of the inner wall N.

[0045] Specifically, a long strip-shaped semi-U-shaped first positioning protrusion 2021 is provided at the center position of the rib T corresponding to the first segmented nozzle 101 of the U-shaped docking interface 201, and a long strip-shaped semi-U-shaped second positioning protrusion 2022 is provided at the center position of the rib T corresponding to the second segmented nozzle 102. Both the first positioning protrusion 2021 and the second positioning protrusion 2022 are at a certain distance from the docking line of the inner wall N and are discontinuously arranged on the U-shaped docking interface 201.

[0046] As Figures 4a to 4d shown, according to an embodiment of the present invention, in step S2: the clamping rib 301 is L-shaped as a whole and is divided into a first side 3011 and a second side 3012. The first side 3011 is used to cover the upper part of the U-shaped docking interface 201 and is set as a square, and the second side 3012 is used to cover the side of the U-shaped docking interface 201 and is set as a U-shaped. After the clamping rib 301 covers the U-shaped docking interface 201, the first side 3011 is smoothly transitioned with the outer walls W of the first segmented nozzle 101 and the second segmented nozzle 102.

[0047] Specifically, a clamping rib 301 module adapted to the U-shaped docking interface 201 and the positioning protrusion 202 is designed and produced. As one of the embodiments, the clamping rib 301 can be set with a height of 6 mm and a width of 3 mm. The L-shaped clamping rib 301 is divided into a first side 3011 and a second side 3012. Similarly, as described above, the first side 3011 is adapted to the upper part of the U-shaped docking interface 201 and is set as a square, and the second side 3012 is adapted to the side of the U-shaped docking interface 201 and is set as a U-shaped. After the clamping rib 301 covers the U-shaped docking interface 201, the first side 3011 is smoothly transitioned with the outer walls W of the first segmented nozzle 101 and the second segmented nozzle 102.

[0048] Through the multiple clamping ribs 301 in this embodiment, the upper end of the U-shaped docking port 201 formed by the first segmented nozzle 101 and the second segmented nozzle 102 can be effectively covered, and the second side surface 3012 of each clamping rib 301 can effectively seal the corresponding cooling channel, so that the flow path of the cooling channel is not short-circuited, avoiding the short flow of the coolant at the connection and losing the cooling effect.

[0049] According to an embodiment of the present invention, in step S2: the thickness of the first side surface 3011 is the thickness of the outer wall W, and the thickness of the second side surface 3012 is the thickness of the rib T.

[0050] According to an embodiment of the present invention, in step S2: both ends of the first side surface 3011 of the clamping rib 301 are in the form of overlapping platforms. The overlapping platform is divided into a first overlapping surface 3013 and a second overlapping surface 3014. After docking two adjacent clamping ribs 301, the first overlapping surface 3013 and the adjacent second overlapping surface 3014 overlap each other.

[0051] According to an embodiment of the present invention, in step S2: two card slots 3015 are provided below the second side surface 3012 of the clamping rib 301. The two card slots 3015 are used to respectively embed the first positioning protrusion 2021 and the second positioning protrusion 2022 during the installation of the clamping rib 301 onto the U-shaped docking port 201.

[0052] Specifically, since the first side surface 3011 of the clamping rib 301 is used to cover the upper part of the U-shaped docking port 201 and smoothly transition with the outer walls W of the first segmented nozzle 101 and the second segmented nozzle 102, the thickness of the first side surface 3011 is set to the thickness of the outer wall W; the second side surface 3012 of the clamping rib 301 is used to cover the side ribs T of the U-shaped docking port 201 and smoothly transition, so the thickness of the second side surface 3012 is set to the thickness of the rib T. The nozzle using this connection method is more stable and firm.

[0053] Among them, the height of the overlapping platform of the first side surface 3011 of the clamping rib 301 is 1 / 3 to 1 / 2 of the thickness of the outer wall W. The overlapping platform is divided into a first overlapping surface 3013 and a second overlapping surface 3014. The first overlapping surface 3013 and the second overlapping surface 3014 are square concave platforms with matching shapes and are respectively arranged at the upper and lower ends of the first side surface 3011. The first overlapping surface 3013 of one clamping rib 301 overlaps with the second overlapping surface 3014 of the adjacent clamping rib 301. After each clamping rib 301 goes through this step, a welding operation is performed to complete the connection between the first segmented nozzle 101 and the second segmented nozzle 102.

[0054] In one embodiment, the widths of the two card slots 3015 below the second side surface 3012 of the card rib 301 are the same as the width of the positioning protrusion 202, and a positive tolerance range of 0.1 mm can be selected. When the card rib 301 is installed into the U-shaped interface, the first positioning protrusion 2021 and the second positioning protrusion 2022 can be respectively embedded into the two card slots 3015, enabling accurate positioning and stability after installation.

[0055] As Figure 5 , according to an embodiment of the present invention, before step S2: First, weld the inner wall N connection seam after the butt joint of the first segmented nozzle 101 and the second segmented nozzle 102.

[0056] As Figures 6 to 10 As shown, according to an embodiment of the present invention, in step S2: After installing a card rib 301, weld the second side surface 3012 to the rib T along the U-shaped path where the card rib 301 and the positioning protrusion 202 cooperate with each other. Then, after installing the adjacent card rib 301, also weld the second side surface 3012 to the corresponding rib T along the U-shaped path, and then weld the connection seam of the first side surface 3011 of the two card ribs 301. Repeat this step until all the card ribs 301 are installed and welded, and finally weld the connection seams between all the card ribs 301 and the first segmented nozzle 101 and the second segmented nozzle 102.

[0057] Specifically, butt joint the first segmented nozzle 101 and the second segmented nozzle 102 and ensure that the butt joint positions of each rib T are axially aligned, and use a laser beam to weld the I-shaped path groove of the inner wall N connection weld.

[0058] Among them, install the card ribs 301 one by one in sequence, and first weld the U-shaped connection weld of the card rib 301 in the direction of the arrow shown in the attachment Figure 6 As shown, that is, the U-shaped path weld where the card rib cooperates with the first positioning protrusion 2021 and the second positioning protrusion 2022 to weld the second side surface 3012 to the rib T. Then, after installing the adjacent card rib 301, also weld the second side surface 3012 to the corresponding rib T along the U-shaped path. Then weld the connection seam of the first side surface 3011 of the two card ribs 301, that is, the I-shaped path lap weld, install the third adjacent card rib 301 and weld the U-shaped path weld and the I-shaped path weld in sequence. The I-shaped path weld needs to extend the weld to the outer walls W on both sides to improve the welding strength. Repeat this step until all the card ribs 301 are welded, and finally weld the annular connection seams between all the card ribs 301 and the first segmented nozzle 101 and the second segmented nozzle 102. Inflate the cooling channel of the nozzle to detect leakage points. If there is no abnormality, the preparation of the nozzle is completed.

[0059] As one of the embodiments, the penetration depth of the U-shaped path seam welding is 0.5 to 1 mm. The time for positioning and clamping each clamping rib 301 is about 10 seconds, and the time for laser welding each weld seam is about 10 + 10 seconds. In one embodiment, calculated according to 300 clamping ribs for one nozzle, the automated production cycle is about: 300 * 30 s = 150 minutes.

[0060] In the segmented nozzle connection method of the present application, using the clamping ribs 301 to achieve multiple separate weld seams can be more reliable, significantly improving the welding efficiency. The load-bearing is strengthened by the strength of the clamping ribs 301, and sealing is achieved through laser welding, enabling the functions of load-bearing and propellant backflow. For torque loads, the weld seam and the slot 3015 of the clamping rib 301 bear the load together. Under the scale of existing production equipment and printing equipment, using this method, ultra-large backflow nozzles can be produced, with high connection load-bearing strength, high process automation, and high efficiency, solving the problem that large backflow nozzles cannot be segmented and manufactured separately at low cost and segmented connection.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A connection method for a segmented nozzle, characterized in that, The segmented nozzle is divided into several segments along the axial direction of the nozzle. The cooling channel formed by the inner wall, longitudinal ribs and outer wall of the nozzle can realize the back-and-forth flow of the coolant. The method includes: Step S1, docking the docking surfaces of the adjacent first segmented nozzle and the second segmented nozzle. The docked part forms a U-shaped docking port after docking. A positioning protrusion is provided at the rib of the U-shaped docking port. Step S2, installing multiple clamping ribs with clamping grooves onto the positioning protrusion one by one to cover the U-shaped docking port, and welding the docking surfaces of the clamping ribs one by one to complete the connection of the segmented nozzles.

2. The connection method for a segmented nozzle according to claim 1, characterized in that, In step S1: The U-shaped docking port is formed by setting the outer wall and ribs into an annular U-shape with the inner wall as the bottom surface, and the docking surfaces of the first segmented nozzle and the second segmented nozzle are symmetrically set into a semi-U shape.

3. The connection method for a segmented nozzle according to claim 1, characterized in that, In step S1: The positioning protrusion provided at the center of the rib of the U-shaped docking port is semi-U-shaped. The first positioning protrusion of the first segmented nozzle and the second positioning protrusion of the second segmented nozzle are both at a certain distance from the inner wall docking line.

4. The connection method for a segmented nozzle according to claim 1, characterized in that, In step S1: The U-shaped docking port is provided with a transition fillet, and the range of the transition fillet R is 0.5 - 2 mm.

5. The connection method for a segmented nozzle according to claim 3, characterized in that, In step S2: The clamping rib is L-shaped as a whole, and is divided into a first side surface and a second side surface. The first side surface is used to cover the upper part of the U-shaped docking port and is set into a square shape. The second side surface is used to cover the side of the U-shaped docking port and is set into a U shape. After the clamping rib covers the U-shaped docking port, the first side surface is smoothly transitioned with the outer walls of the first segmented nozzle and the second segmented nozzle.

6. The connection method for a segmented nozzle according to claim 5, characterized in that, In step S2: The thickness of the first side surface is the thickness of the outer wall, and the thickness of the second side surface is the thickness of the rib.

7. The connection method for a segmented nozzle according to claim 5, characterized in that, In step S2: The two ends of the first side surface of the clamping rib are in the form of lapping platforms. The lapping platforms are divided into a first lapping surface and a second lapping surface. After docking two adjacent clamping ribs, the first lapping surface and the adjacent second lapping surface lap each other.

8. The connection method for a segmented nozzle according to claim 6, characterized in that, In step S2: Two clamping grooves are provided below the second side surface of the clamping rib. The two clamping grooves are used to respectively embed the first positioning protrusion and the second positioning protrusion during the process of installing the clamping rib onto the U-shaped docking port.

9. The connection method for a segmented nozzle according to claim 1, characterized in that, Before step S2: First, weld the inner wall connection seam after docking the first segmented nozzle and the second segmented nozzle.

10. The connection method for a segmented nozzle according to claim 5, characterized in that, In step S2: After installing one clamping rib, weld the second side surface to the rib along the U-shaped path where the clamping rib and the positioning protrusion cooperate with each other. Then, after installing the adjacent clamping rib, also weld the second side surface to the corresponding rib along the U-shaped path. Then, weld the connection seam of the first side surfaces of the two clamping ribs. Repeat this step until all the clamping ribs are installed and welded. Finally, weld the connection seams between all the clamping ribs and the first segmented nozzle and the second segmented nozzle.

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