Small-caliber high-temperature spray pipe structure

Abstract

The invention provides a small-caliber high-temperature spray pipe structure which comprises a spray pipe neck bush which comprises a neck bush shell and a water cooling shell, and the water cooling shell is arranged at the closing end of the neck bush shell in a sleeving mode; the spray pipe outer shell is arranged on the spray pipe neck bush to form a cooling chamber; wherein the first end of the spray pipe outer shell is connected with the opening end of the neck bush shell, the second end of the spray pipe outer shell is connected with the water cooling shell, and the closing end of the spray pipe neck bush protrudes out of the spray pipe outer shell. The spray pipe has the beneficial effects that the second end of the spray pipe outer shell is connected with the water cooling shell, so that the closing end of the spray pipe neck bush protrudes out of the spray pipe outer shell, the protruding structure provides space allowance for solving the problems such as calibration probe arrangement and operation convenience, and interference and inconvenience which are likely to occur when a traditional contraction spray pipe section is used are avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of wind tunnels, and specifically relates to a small-caliber high-temperature nozzle structure. Background Art

[0002] The variable pressure thermal calibration wind tunnel is mainly used for the steady-state and dynamic performance calibration of airflow temperature sensors, which is particularly important in the design, development and experiment of aircraft engine models. It can be used to calculate combustion efficiency, analyze the temperature distribution at the combustion chamber outlet, and ensure the safe operation of turbine blades. The test section of the variable pressure thermal calibration wind tunnel has a uniform and stable temperature field and velocity field. The temperature and velocity can be adjusted within a fairly wide range, thereby solving the steady-state and dynamic temperature calibration problems.

[0003] The main function of the contraction nozzle section is to uniformly accelerate the airflow from the stable section to the required test wind speed and improve the flow field quality of the test section. The unevenness and turbulence of the flow field in the test section are inversely proportional to the square of the contraction ratio. Increasing the contraction ratio can significantly improve the uniformity of the flow field in the test section and reduce the turbulence. The working pressure range of the contraction nozzle section is 0-0.6MPa, the internal air flow temperature range is 400℃-1200℃, the outlet size of the contraction nozzle section is Φ100mm in diameter, and a bicubic curve design is adopted. The nozzle end face of the traditional contraction nozzle is flush with the flange and cannot protrude, but due to the limited length of the uniform flow field area from the nozzle outlet, this structure is prone to interference when the calibration probe needs to turn an angle, and it is difficult to arrange the calibrated probe. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] In order to solve the above problems, the present application provides a small-caliber high-temperature nozzle structure, including:

[0006] The nozzle inner sleeve comprises an inner sleeve shell and a water-cooling shell, and the water-cooling shell is sleeved on the closing end of the inner sleeve shell;

[0007] A nozzle outer shell, the nozzle outer shell is arranged on the nozzle inner sleeve to form a cooling chamber;

[0008] The first end of the nozzle outer shell is connected to the open end of the inner sleeve shell, the second end of the nozzle outer shell is connected to the water-cooled shell, and the closed end of the nozzle inner sleeve protrudes out of the nozzle outer shell.

[0009] Optionally, a first dividing strip is provided on the inner sleeve shell and between the open end and the closed end of the inner sleeve shell, and the first dividing strip divides the cooling chamber into a plurality of cooling zones.

[0010] Optionally, it also includes a second dividing strip and a third dividing strip, and each cooling zone is provided with a second dividing strip and a third dividing strip located on the inner sleeve shell, the first end of the second dividing strip is connected to the open end of the inner sleeve shell, the first end of the third dividing strip is connected to one of the two adjacent first dividing strips, a gap is left between the second end of the second dividing strip and the first end of the third dividing strip, and a gap is left between the second end of the third dividing strip and the closing end of the inner sleeve shell, the second dividing strip divides the cooling zone into a first flow channel and a second flow channel, the third dividing strip divides the cooling zone into a third flow channel and a fourth flow channel, and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are connected.

[0011] Optionally, the third dividing strip is an L-shaped structure.

[0012] Optionally, the nozzle outer shell includes:

[0013] An inlet flange, the inlet flange is connected to the open end of the inner sleeve shell, a first cooling cavity is formed on the inlet flange, and the first cooling cavity is communicated with the cooling chamber;

[0014] An outlet flange, the outlet flange is connected to the water-cooling housing, a second cooling cavity is provided on the outlet flange, and the second cooling cavity is connected to the cooling chamber through the water-cooling housing;

[0015] The outer shell body is arranged between the inlet flange and the outlet flange and is located outside the inner sleeve shell.

[0016] Optionally, a plurality of first dividing plates are provided in the first cooling cavity, and the first dividing plates divide the first cooling cavity into a plurality of water inlet cooling cavities.

[0017] Optionally, a plurality of second dividing plates are provided in the second cooling cavity, and the second dividing plates divide the second cooling cavity into a plurality of water outlet cooling cavities.

[0018] Optionally, a water inlet main pipe and a water inlet branch pipe are provided on the inlet flange, the water inlet branch pipe is provided between the water inlet main pipe and the inlet flange, and the water inlet branch pipe is communicated with the first cooling chamber.

[0019] Optionally, a water outlet main pipe and a water outlet branch pipe are provided on the outlet flange, the water outlet main pipe is connected to the outlet flange via the water outlet branch pipe, and the water outlet branch pipe is communicated with the second cooling chamber.

[0020] Optionally, the inlet flange is flush with the opening end of the inner sleeve shell, and the outlet flange is 100mm-200mm away from the closing end of the inner sleeve shell.

[0021] Beneficial Effects

[0022] In an embodiment of the present invention, a small-diameter high-temperature nozzle structure is provided. The second end of the nozzle outer shell is connected to the water-cooled shell, so that the closing end of the nozzle inner sleeve protrudes out of the nozzle outer shell. The protruding structure provides space margin for solving problems such as calibration probe arrangement and operational convenience, avoids interference and inconvenience that are prone to occur when using traditional contraction nozzle sections, provides space for data collection under different working conditions, can meet the requirements of open and closed experiments, and effectively improves the adaptability and reliability of the contraction nozzle section in complex experiments and industrial application scenarios. At the same time, the coolant enters the cooling chamber through the inlet flange and the outlet flange, thereby cooling the nozzle inner sleeve while also cooling the inlet flange and the outlet flange, thereby improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a small-caliber high-temperature nozzle structure of the present application;

[0024] Figure 2 This is a schematic diagram of the nozzle outer shell structure of the small-caliber high-temperature nozzle structure of the present application;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the nozzle inner liner of the small-caliber high-temperature nozzle structure of the present application;

[0026] Figure 4 This is a schematic diagram of the cooling liquid flow structure of the nozzle inner sleeve of the small-caliber high-temperature nozzle structure of the present application;

[0027] Figure 5 This is an enlarged structural schematic diagram of the coolant flow direction of the nozzle inner sleeve of the small-caliber high-temperature nozzle structure of the present application;

[0028] Figure 6 This is a schematic diagram of the cross-sectional structure of the inlet flange of the small-diameter high-temperature nozzle structure of the present application;

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of the outlet flange of the small-diameter high-temperature nozzle structure of the present application;

[0030] Figure 8 This is a schematic diagram of the water-cooled shell structure of the small-caliber high-temperature nozzle structure of the present application;

[0031] Fig. 9 This is a schematic diagram of the cross-sectional structure at AA of the water-cooled shell of the small-diameter high-temperature nozzle structure of the present application.

[0032] The reference numerals are as follows:

[0033] 1. Nozzle inner sleeve; 2. Inner sleeve shell; 3. Water-cooled shell; 4. Nozzle outer shell; 5. First dividing strip; 6. Second dividing strip; 7. Third dividing strip; 8. First flow channel; 9. Second flow channel; 10. Third flow channel; 11. Fourth flow channel; 12. Inlet flange; 13. First cooling chamber; 14. Outlet flange; 15. Second cooling chamber; 16. Shell body; 17. First dividing plate; 18. Second dividing plate; 19. Water inlet main pipe; 20. Water inlet branch pipe; 21. Water outlet main pipe; 22. Water outlet branch pipe. DETAILED DESCRIPTION

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0038] See also Figure 1-9 As shown, according to an embodiment of the present application, a small-caliber high-temperature nozzle structure is provided, comprising:

[0039] A nozzle inner liner 1, the nozzle inner liner 1 comprises an inner liner shell 2 and a water-cooling shell 3, the water-cooling shell 3 is sleeved on the closing end of the inner liner shell 2;

[0040] A nozzle outer shell 4, wherein the nozzle outer shell 4 is arranged on the nozzle inner sleeve 1 to form a cooling chamber;

[0041] The first end of the nozzle outer shell 4 is connected to the open end of the inner sleeve shell 2 , the second end of the nozzle outer shell 4 is connected to the water-cooling shell 3 , and the closed end of the nozzle inner sleeve 1 protrudes out of the nozzle outer shell 4 .

[0042] The small-caliber high-temperature nozzle structure provided in this embodiment includes a nozzle inner sleeve 1 and a nozzle outer shell 4. The inner sleeve shell 2 is made of high-temperature resistant material and has a specific wall thickness and structural strength. Its inner wall profile is carefully shaped according to the principles of fluid mechanics to guide the airflow to accelerate smoothly. The water-cooling shell 3 is sleeved on the closed end of the inner sleeve shell 2, and the two are tightly connected to ensure that the coolant will not leak or turbulent when flowing therebetween.

[0043] The nozzle outer shell 4 is sleeved on the outside of the nozzle inner sleeve 1 to construct a cooling chamber. The cooling chamber ensures sufficient storage and circulation space for the coolant, and enables the cooling effect to act evenly on the nozzle inner sleeve 1. The connection between the first end of the nozzle outer shell 4 and the open end of the inner sleeve shell 2 adopts a high-strength, high-temperature resistant connection method, such as precision welding or special bolt connection, to ensure the stability and sealing of the connection under high temperature and high pressure environment. The connection between the second end of the nozzle outer shell 4 and the water-cooled shell 3 is also firm and reliable, so that the closed end of the nozzle inner sleeve 1 can protrude from the nozzle outer shell 4. The protruding structure provides space margin for solving problems such as calibration probe layout and operational convenience, avoids interference and inconvenience that are easy to occur when using traditional contraction nozzle sections, provides space for data collection under different working conditions, can meet the requirements of open and closed experiments, and effectively improves the adaptability and reliability of the contraction nozzle section in complex experiments and industrial application scenarios.

[0044] A first dividing strip 5 is disposed on the inner sleeve shell 2 and between the open end and the closed end of the inner sleeve shell 2 , and the first dividing strip 5 divides the cooling chamber into a plurality of cooling zones.

[0045] In this technical solution, the first dividing strip 5 is arranged on the inner sleeve shell 2, and the first dividing strip 5 is located between the opening end and the closing end of the inner sleeve shell 2. The material thereof is selected to be a material resistant to high temperature and having good thermal conductivity, such as a specific alloy steel material. The first dividing strip 5 is firmly and reliably connected to the inner sleeve shell 2, and can be integrally formed, welded or highly bonded, to ensure that it will not fall off or deform in a harsh environment of high temperature, high pressure and long-term flushing of coolant.

[0046] The first dividing strip 5 divides the cooling chamber into a plurality of cooling zones, which are evenly distributed on the inner sleeve shell 2. The coolant can form an independent and orderly flow path in each cooling zone, effectively avoiding the turbulence and short circuit of the coolant in the cooling chamber, making the heat exchange between the coolant and the inner sleeve 1 of the nozzle more sufficient and uniform, greatly improving the overall cooling effect of the cooling chamber. This can not only ensure that the contraction nozzle section works stably and reliably under high temperature and high heat flux density environment, and extend the service life of the contraction nozzle section, but also provide a more stable temperature environment for the uniform acceleration of the airflow in the contraction nozzle section, and improve the performance accuracy and reliability of the contraction nozzle section in airflow processing and related experimental applications.

[0047] Furthermore, the number of the first dividing strips 5 is 18, dividing the inner liner shell 2 into 18 cooling zones.

[0048] It also includes a second dividing strip 6 and a third dividing strip 7. The second dividing strip 6 and the third dividing strip 7 are arranged in each cooling zone and on the inner sleeve shell 2. The first end of the second dividing strip 6 is connected to the open end of the inner sleeve shell 2, and the first end of the third dividing strip 7 is connected to one of the two adjacent first dividing strips 5. A gap is left between the second end of the second dividing strip 6 and the first end of the third dividing strip 7, and a gap is left between the second end of the third dividing strip 7 and the closing end of the inner sleeve shell 2. The second dividing strip 6 divides the cooling zone into a first flow channel 8 and a second flow channel 9, and the third dividing strip 7 divides the cooling zone into a third flow channel 10 and a fourth flow channel 11. The first flow channel 8, the second flow channel 9 are connected to the third flow channel 10 and the fourth flow channel 11.

[0049] In this technical solution, the second dividing strip 6 and the third dividing strip 7 play an important role as components for further optimizing the coolant flow path and heat exchange efficiency inside the cooling chamber. The second dividing strip 6 and the third dividing strip 7 are located in each cooling zone and are arranged on the inner sleeve shell 2. Their materials also have excellent high temperature resistance and good thermal conductivity, which are compatible with the materials of the first dividing strip 5 and the inner sleeve shell 2, ensuring the stability and functionality of the overall structure under high temperature environment.

[0050] The first end of the second dividing strip 6 is tightly connected to the open end of the inner sleeve shell 2, and the connection method adopts high-strength, high-temperature resistant welding or a special fastening connection process to ensure that there will be no loosening or detachment under harsh conditions such as high temperature, high pressure and coolant flushing. The first end of the third dividing strip 7 is firmly connected to one of the two adjacent first dividing strips 5, and the firmness and reliability of its connection have also been tested. A gap is deliberately left between the second end of the second dividing strip 6 and the first end of the third dividing strip 7, and a gap is also left between the second end of the third dividing strip 7 and the closing end of the inner sleeve shell 2, which can facilitate the flow of coolant. The second dividing strip 6 divides the cooling zone into a first flow channel 8 and a second flow channel 9, and the third dividing strip 7 divides the cooling zone into a third flow channel 10 and a fourth flow channel 11, and the first flow channel 8, the second flow channel 9 are connected to the third flow channel 10 and the fourth flow channel 11. In actual operation, after the coolant enters the cooling zone, it will flow along the first flow channel 8 and the second flow channel 9 respectively, then converge into the third flow channel 10, and finally flow into the fourth flow channel 11, so that the coolant forms a complex and efficient microcirculation path in the cooling zone. This microcirculation path can increase the contact area and contact time between the coolant and the inner liner housing 2, improve the heat exchange efficiency, and make the cooling more uniform and sufficient.

[0051] The third dividing strip 7 is an L-shaped structure.

[0052] In this technical solution, the third dividing strip 7 is in an L-shaped structure, one side of the L-shaped structure is firmly connected to one of the two adjacent first dividing strips 5 to form a sealing area of ​​the fourth flow channel 11, and the other side has a gap with the side wall of the closing end of the inner sleeve shell 2, which facilitates the coolant to enter the fourth flow channel 11 from the third flow channel 10. The advantage of this L-shaped structure is that it can divide the space in the cooling zone more flexibly and accurately. Compared with other conventionally shaped dividing strips, the L-shaped structure can create a more complex and reasonable flow channel layout in a limited cooling zone. For example, it can guide the coolant to change its flow direction when flowing through different flow channels, so that the coolant forms a circuitous and surrounding flow path in the cooling zone, further increasing the contact frequency and contact time between the coolant and the inner sleeve shell 2, making the heat exchange process more sufficient and efficient.

[0053] The nozzle outer shell 4 comprises:

[0054] An inlet flange 12, wherein the inlet flange 12 is connected to the open end of the inner liner housing 2, and a first cooling cavity 13 is formed on the inlet flange 12, and the first cooling cavity 13 is communicated with the cooling chamber;

[0055] An outlet flange 14, wherein the outlet flange 14 is connected to the water-cooling housing 3, and a second cooling cavity 15 is provided on the outlet flange 14, and the second cooling cavity 15 is connected to the cooling chamber through the water-cooling housing 3;

[0056] The outer shell body 16 is disposed between the inlet flange 12 and the outlet flange 14 and is located outside the inner liner shell 2 .

[0057] In this technical solution, the inlet flange 12 is used as the front end connection component of the nozzle outer shell 4, and is connected to the open end of the inner sleeve shell 2 by a high-precision connection process, such as precision welding or special bolt connection, to ensure the stability and sealing of the connection, and prevent the leakage of coolant and the escape of high-temperature gas. The first cooling cavity 13 opened on the inlet flange 12 is connected to the cooling chamber, and the coolant can circulate smoothly between the two. When the coolant enters the first cooling cavity 13 from the external pipeline, it can be evenly dispersed and flow into the first flow channel 8 or the second flow channel 9 in the cooling chamber to cool the nozzle inner sleeve 1.

[0058] The outlet flange 14 is tightly connected to the water-cooled shell 3, and the second cooling chamber 15 arranged on the outlet flange 14 is connected to the fourth flow channel 11 in the cooling chamber through the water-cooled shell 3, and the connection is located at the end of the fourth flow channel 11. Through such a setting, the outlet flange 14 can be located on the inner side of the closing end of the nozzle inner sleeve 1, and the closing end of the nozzle inner sleeve 1 can protrude from the outlet flange 14, providing space for data collection under different working conditions, avoiding interference and inconvenience when using probe calibration. It also makes it possible for the coolant entering the cooling chamber to converge through the first flow channel 8 and the second flow channel 9 and then enter the third flow channel 10 and the fourth flow channel 11, so that the coolant can flow more stably in the inner sleeve shell 2 without flow loss, thereby improving the cooling efficiency.

[0059] The outer shell body 16 is arranged between the inlet flange 12 and the outlet flange 14, and is sleeved on the outside of the inner sleeve shell 2. The material thereof has good high temperature resistance, high pressure resistance and high strength, such as stainless steel or high temperature alloy. The shape and size of the outer shell body 16 are adapted to the inner sleeve shell 2, and while ensuring sufficient coolant flow space, a reliable external protective structure is provided for the contraction nozzle section, ensuring the stability and safety of the overall structure of the contraction nozzle section. By opening a first cooling cavity 13 on the inlet flange 12 and a second cooling cavity 15 on the outlet flange 14, the coolant can flow through the inlet flange 12 and the outlet flange 14, so that the inlet flange 12 and the outlet flange 14 can be cooled, thereby improving the cooling effect.

[0060] A plurality of first partition plates 17 are disposed in the first cooling chamber 13 , and the first partition plates 17 partition the first cooling chamber 13 into a plurality of water inlet cooling chambers.

[0061] In this technical solution, a plurality of first partition plates 17 are arranged in the first cooling cavity 13. The first partition plates 17 partition the first cooling cavity 13 into a plurality of water inlet cooling cavities, so that after the coolant enters the first cooling cavity 13, it can be evenly dispersed into each cooling zone, thereby reducing the phenomenon of concentrated flow of the coolant or excessively fast or too slow flow rate in a local area. In actual operation, the coolant enters the first cooling cavity 13 from an external pipeline, and is guided to each water inlet cooling cavity due to the presence of the first partition plates 17. In each water inlet cooling cavity, the coolant is in full contact with the cavity wall, thereby cooling the inlet flange 12. At the same time, through the arrangement of a plurality of water inlet cooling cavities, it is also convenient to evenly feed the coolant into each cooling zone, thereby improving the uniformity of the distribution of the coolant in the cooling zone and further improving the cooling efficiency.

[0062] Furthermore, there are 12 first partition plates 17, which evenly divide the first cooling chamber 13 into 12 water inlet cooling chambers. An outlet groove is provided at the bottom of the inlet flange 12 corresponding to each water inlet cooling chamber, and the coolant can be fed into the cooling chamber through the outlet groove.

[0063] A plurality of second dividing plates 18 are disposed in the second cooling cavity 15 , and the second dividing plates 18 divide the second cooling cavity 15 into a plurality of water outlet cooling cavities.

[0064] In this technical solution, a plurality of second partition plates 18 are provided in the second cooling chamber 15, and the second partition plates 18 partition the second cooling chamber 15 into a plurality of water outlet cooling chambers, so that the coolant can perform heat exchange in an orderly and efficient manner when flowing through the second cooling chamber 15. When the coolant flows from the water-cooled housing 3 into the second cooling chamber 15, it will be guided to each water outlet cooling chamber by the second partition plate 18. In each water outlet cooling chamber, the coolant is in full contact with the chamber wall during the flow process, and with the help of the good thermal conductivity of the chamber wall, the heat carried is quickly dissipated, thereby achieving deep cooling of the outlet flange 14. The layout of multiple water outlet cooling chambers effectively increases the contact area and action time between the coolant and the outlet flange 14, greatly improving the heat exchange efficiency.

[0065] Furthermore, there are six second dividing plates 18, which evenly divide the second cooling chamber 15 into six water outlet cooling chambers. An inlet groove is provided at the bottom of the outlet flange 14 corresponding to each water outlet cooling chamber to discharge the coolant entering the cooling zone from the inlet groove.

[0066] The inlet flange 12 is provided with a water inlet main pipe 19 and a water inlet branch pipe 20 . The water inlet branch pipe 20 is provided between the water inlet main pipe 19 and the inlet flange 12 . The water inlet branch pipe 20 is communicated with the first cooling chamber 13 .

[0067] In this technical solution, the inlet flange 12 is provided with a water inlet main pipe 19 and a water inlet branch pipe 20. The water inlet main pipe 19 serves as the main channel for the entire coolant transportation, and is often made of pipes with excellent high temperature resistance, high pressure resistance and corrosion resistance. Through it, the coolant from the external coolant supply system can be introduced stably and continuously, providing sufficient power source for the subsequent cooling process.

[0068] The water inlet branch pipe 20 is located between the water inlet main pipe 19 and the inlet flange 12. Its own material matches the water inlet main pipe 19 and also has good ability to withstand high temperature and high pressure environment, ensuring that there will be no problems such as rupture and deformation under complex and harsh working conditions. The number, pipe diameter and specific distribution and arrangement of the water inlet branch pipes 20 are set according to the internal structural characteristics of the first cooling chamber 13 and the strict requirements for uniform distribution of the coolant. The water inlet branch pipe 20 is connected to the first cooling chamber 13. When the coolant flows in from the water inlet main pipe 19, the water inlet pipeline disperses the coolant to various parts of the first cooling chamber 13. For example, if the first cooling chamber 13 is divided into multiple water inlet cooling chambers, the water inlet branch pipes 20 will be distributed in a circular, radial or specific array form according to the corresponding layout, so that the coolant can flow into each water inlet cooling chamber evenly and proportionally, effectively avoiding the local aggregation of the coolant or uneven flow distribution, thereby ensuring that the coolant in the first cooling chamber 13 can be fully and efficiently exchanged with the cavity wall. It can ensure that the inlet flange 12 can achieve comprehensive and uniform cooling when facing the impact of high-temperature airflow, thereby achieving stable and reliable operation of the entire nozzle in a high-temperature, high-heat flux density working environment.

[0069] Furthermore, there are 12 water inlet branch pipes 20, each of which is connected to a water inlet cooling cavity. The water inlet main pipe 19 is connected to the water inlet branch pipe 20, and a joint is installed on the water inlet main pipe 19 to facilitate connection with the coolant inlet pipeline.

[0070] The outlet flange 14 is provided with a water outlet main pipe 21 and a water outlet branch pipe 22 . The water outlet main pipe 21 is connected to the outlet flange 14 via the water outlet branch pipe 22 . The water outlet branch pipe 22 is in communication with the second cooling chamber 15 .

[0071] In this technical solution, a water outlet main pipe 21 and a water outlet branch pipe 22 are provided on the outlet flange 14. The water outlet main pipe 21 is made of pipes with excellent high temperature resistance, high pressure resistance and good fluid conveying performance. The pipe diameter can meet the flow demand of the coolant taken out of the nozzle, ensuring that the coolant can flow smoothly to the external recovery or subsequent treatment system without blockage or flow restriction due to too small a pipe diameter, and without unnecessary material waste and impact on the compactness of the overall structure due to too large a pipe diameter.

[0072] The outlet branch pipe 22 is located between the outlet main pipe 21 and the outlet flange 14. It is connected to the outlet main pipe 21. The sealing and stability of the connection can withstand the pressure generated by the flow of coolant and various external forces during the operation of the nozzle without loosening or leakage. The number, diameter and distribution of the outlet branch pipes 22 are all set according to the internal structural characteristics of the second cooling chamber 15 and the requirement for uniform coolant outflow.

[0073] The outlet branch pipe 22 is connected to the second cooling chamber 15 through a reliable connection method. During the cooling process, the coolant that has completed the heat exchange in each outlet cooling chamber in the second cooling chamber 15 will be orderly gathered to the outlet main pipe 21 under the guidance of the outlet branch pipe 22. For example, when the second cooling chamber 15 is divided into multiple outlet cooling chambers, the outlet branch pipes 22 will be distributed in a circular, radial or specific array form and reasonably distributed at the corresponding positions to ensure that the coolant in each outlet cooling chamber can be evenly collected, avoiding the problem of coolant residue or local outflow, so that the coolant can efficiently and smoothly flow out from the outlet flange 14, thereby ensuring the normal circulation and stable operation of the entire cooling system.

[0074] Furthermore, there are six outlet branch pipes 22, each return branch pipe is connected to a water outlet cooling cavity, the outlet main pipe 21 is connected to the outlet branch pipe 22, and a joint is installed on the outlet main pipe 21 to facilitate connection with the coolant outlet pipeline.

[0075] The inlet flange 12 is flush with the opening end of the inner sleeve shell 2 , and the outlet flange 14 is 100 mm-200 mm away from the closing end of the inner sleeve shell 2 .

[0076] In this technical solution, the inlet flange 12 is flush with the open end of the inner sleeve shell 2. The flush connection makes the force transmission more uniform, reduces the stress concentration points caused by structural mutations, and can better maintain the integrity of the overall structure when the nozzle is subjected to the impact of high-temperature and high-pressure airflow and coolant pressure, reducing the risk of damage such as cracks and deformation.

[0077] The outlet flange 14 and the closing end of the inner sleeve shell 2 maintain a distance of 100mm-200mm, preferably 150mm. In terms of airflow, this distance can provide appropriate diffusion space for the airflow at the nozzle outlet, so that the airflow can more fully adjust the velocity and pressure distribution before leaving the nozzle, reduce the generation of turbulence, and improve the stability and uniformity of the airflow, thereby improving the performance accuracy of the nozzle in airflow processing applications. In terms of external connection, this distance provides sufficient operating space for connecting external equipment (such as measuring instruments, pipelines, etc.), facilitating installation, commissioning and maintenance work, and also reserves suitable positions for possible sealing structures, thermal insulation structures, etc., enhancing the flexibility and reliability of the integration of the nozzle and the external system.

[0078] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A small-caliber high-temperature nozzle structure, characterized in that: include: A nozzle inner sleeve (1), the nozzle inner sleeve (1) comprising an inner sleeve shell (2) and a water-cooling shell (3), the water-cooling shell (3) being sleeved on the closing end of the inner sleeve shell (2); A nozzle outer shell (4), the nozzle outer shell (4) being arranged on the nozzle inner sleeve (1) to form a cooling chamber; The first end of the nozzle outer shell (4) is connected to the open end of the inner sleeve shell (2), the second end of the nozzle outer shell (4) is connected to the water-cooling shell (3), and the closed end of the nozzle inner sleeve (1) protrudes out of the nozzle outer shell (4).

2. The small-caliber high-temperature nozzle structure according to claim 1, characterized in that: A first dividing strip (5) is provided on the inner sleeve shell (2) and between the open end and the closed end of the inner sleeve shell (2), and the first dividing strip (5) divides the cooling chamber into a plurality of cooling zones.

3. The small-caliber high-temperature nozzle structure according to claim 2, characterized in that: The cooling device further comprises a second dividing strip (6) and a third dividing strip (7). The second dividing strip (6) and the third dividing strip (7) are arranged in each cooling zone and on the inner sleeve shell (2). The first end of the second dividing strip (6) is connected to the open end of the inner sleeve shell (2), and the first end of the third dividing strip (7) is connected to one of the two adjacent first dividing strips (5). A gap is left between the second end of the second dividing strip (6) and the first end of the third dividing strip (7), and a gap is left between the second end of the third dividing strip (7) and the closing end of the inner sleeve shell (2). The second dividing strip (6) divides the cooling zone into a first flow channel (8) and a second flow channel (9), and the third dividing strip (7) divides the cooling zone into a third flow channel (10) and a fourth flow channel (11). The first flow channel (8), the second flow channel (9), the third flow channel (10) and the fourth flow channel (11) are connected.

4. The small-caliber high-temperature nozzle structure according to claim 3, characterized in that: The third dividing strip (7) is an L-shaped structure.

5. The small-caliber high-temperature nozzle structure according to any one of claims 1 to 4, characterized in that: The nozzle outer shell (4) comprises: An inlet flange (12), the inlet flange (12) being connected to the open end of the inner liner shell (2), the inlet flange (12) being provided with a first cooling cavity (13), the first cooling cavity (13) being in communication with the cooling chamber; An outlet flange (14), the outlet flange (14) being connected to the water-cooling housing (3), the outlet flange (14) being provided with a second cooling cavity (15), the second cooling cavity (15) being connected to the cooling chamber through the water-cooling housing (3); The outer shell body (16) is arranged between the inlet flange (12) and the outlet flange (14) and is located outside the inner sleeve shell (2).

6. The small-caliber high-temperature nozzle structure according to claim 5, characterized in that: A plurality of first dividing plates (17) are arranged in the first cooling chamber (13), and the first dividing plates (17) divide the first cooling chamber (13) into a plurality of water inlet cooling chambers.

7. The small-caliber high-temperature nozzle structure according to claim 6, characterized in that: A plurality of second dividing plates (18) are arranged in the second cooling cavity (15), and the second dividing plates (18) divide the second cooling cavity (15) into a plurality of water outlet cooling cavities.

8. The small-caliber high-temperature nozzle structure according to claim 7, characterized in that: A water inlet main pipe (19) and a water inlet branch pipe (20) are provided on the inlet flange (12); the water inlet branch pipe (20) is provided between the water inlet main pipe (19) and the inlet flange (12); and the water inlet branch pipe (20) is communicated with the first cooling chamber (13).

9. The small-caliber high-temperature nozzle structure according to claim 8, characterized in that: The outlet flange (14) is provided with a water outlet main pipe (21) and a water outlet branch pipe (22); the water outlet main pipe (21) is connected to the outlet flange (14) via the water outlet branch pipe (22); and the water outlet branch pipe (22) is in communication with the second cooling chamber (15).

10. The small-caliber high-temperature nozzle structure according to claim 9, characterized in that: The inlet flange (12) is flush with the opening end of the inner sleeve shell (2), and the outlet flange (14) is 100 mm to 200 mm away from the closing end of the inner sleeve shell (2).

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