An internal mixing type slit high-speed spray cooling device and its application

Abstract

The present invention discloses an internal mixing type slit high-speed spray cooling device and its application, relating to the technical field of heat treatment equipment. An internal mixing type slit high-speed spray cooling device includes a spray pipe, at least one end of the spray pipe is provided with an air pipe, the air pipe is connected to an air pump, a water pipe is arranged on the air pipe, the water pipe is connected to a water pump, a check valve is arranged on the water pipe, and both the air pump and the water pump are electrically connected to a controller; an internal spray flow channel with larger apertures at both ends and a smaller aperture in the middle is arranged inside the spray pipe, and a plurality of slit nozzles are arranged on the side wall of the spray pipe, and the slit nozzles are communicated with the spray flow channel. By adopting the internal mixing type slit high-speed spray cooling device and its application of the present invention, the problem that the existing spray cooling device has poor quenching quality for slender cavity structure parts can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment equipment, and particularly relates to an internal mixing type slit high-speed spray cooling device and its application. Background Art

[0002] Heat treatment is a process of changing the properties of materials through heating and cooling processes. For example, metal materials such as steel can improve their hardness, toughness, strength and other properties through heat treatment. Common heat treatment methods include annealing, quenching, tempering, normalizing, etc. During the heat treatment process, especially in processes such as quenching, the cooling rate and method directly affect the microstructure and properties of the parts.

[0003] At present, oil quenching is often used in the heat treatment cooling process, that is, the heated workpiece is immersed in quenching oil for rapid cooling. However, it faces problems such as a harsh working environment, excessive and uneven residual stress, and difficulty in controlling the microstructure and properties. Existing patents CN202410201009, CN117448526A, and CN117448538A disclose highly integrated high-speed spray cooling methods and devices, which use high-speed water mist jets as jet impingement cooling media to perform controllable rapid cooling on large metal components, especially complex cross-section aviation components, to achieve efficient and clean heat treatment. However, for the slender deep cavity structure with poor openness, affected by the cavity cross-section, the existing spray cooling device cannot enter the interior of the slender cavity, and the high-speed cooling spray is difficult to reach the inner surface of the cavity, resulting in deteriorated heat transfer and difficulty in achieving uniform and rapid cooling of the inner wall surface. Therefore, it is necessary to develop a spray cooling device that can achieve uniform cooling of the inner wall of the slender cavity. Summary of the Invention

[0004] The purpose of the present invention is to provide an internal mixing type slit high-speed spray cooling device and its application to solve the problem of poor quenching quality of the existing spray cooling device for parts with slender cavity structures.

[0005] To achieve the above purpose, the present invention provides an internal mixing type slit high-speed spray cooling device, including a spray pipe. At least one end of the spray pipe is provided with an air pipe, the air pipe is connected to an air pump, a water pipe is provided on the air pipe, the water pipe is connected to a water pump, a check valve is provided on the water pipe, and both the air pump and the water pump are electrically connected to a controller; an internal spray flow channel with larger diameters at both ends and a smaller diameter in the middle is arranged inside the spray pipe, and a plurality of slit nozzles are arranged on the side wall of the spray pipe, and the slit nozzles are communicated with the spray flow channel.

[0006] Preferably, the slit nozzles are evenly distributed on the side wall of the spray pipe, the outer ends of the slit nozzles are located on the same circumference, and the sum of the cross-sectional areas of the longitudinal section of the spray pipe is smaller than the sum of the cross-sectional areas at the inlet of the air pipe.

[0007] Preferably, the length of the slit nozzle is 200 mm - 600 mm, the inner diameter of the end of the spray pipe is 30 mm - 40 mm, and the radius of curvature of the spray pipe is 500 mm - 5000 mm.

[0008] Preferably, the length of the spray channel is 200 mm - 600 mm, the radius of curvature of the spray channel is 500 mm - 5000 mm, and the width of the spray channel is 1 mm - 5 mm.

[0009] Preferably, a deflector plate is arranged at the fog outlet end of the slit nozzle. The deflector plate is fixed on the spray pipe, and diversion holes for spraying water mist are arranged on the deflector plate.

[0010] Preferably, the fog inlet end of the diversion hole is a conical structure with a large opening width at the end and a small opening width in the middle. The fog outlet end of the diversion hole is a flared structure, and the angle of the flared opening is 90° - 150°. The width of the narrowest part of the diversion hole is 0.2 mm - 5 mm.

[0011] Preferably, a gas temperature sensor and a gas pressure sensor are arranged on the air pipe. The air pipe is sleeved outside the spray pipe and is threadedly connected to the spray pipe. Both the gas temperature sensor and the gas pressure sensor are electrically connected to the controller.

[0012] Preferably, a water nozzle is arranged on the air pipe. The water nozzle is connected to the water pipe through a check valve. Installation holes for installing a water temperature sensor and a water pressure sensor are arranged on the water pipe. Both the water temperature sensor and the water pressure sensor are electrically connected to the controller.

[0013] Preferably, the check valve includes a valve body. One end of the valve body is connected to the water nozzle, and a flange plate is arranged at the other end of the valve body. Connection holes are arranged on the flange plate, and the valve body is connected to the water pipe through the connection holes. A gasket is arranged between the flange plate and the water pipe. A valve flap is arranged inside the water inlet end of the valve body. A valve rod is arranged on the valve flap along the axial direction of the valve body. A mounting seat is fixedly arranged inside the valve body, and a through hole for the valve rod to pass through is arranged on the mounting seat. The valve rod is slidably connected to the mounting seat. A spring is arranged between the valve flap and the mounting seat. The valve flap contacts the inner wall of the valve body under the action of the spring. A valve cover is arranged at the water outlet end of the valve body, and a water passing hole is arranged at the center of the valve cover. The area of the water passing hole is smaller than the water inlet area of the valve body, and the inner diameter of the water passing hole is smaller than the inner diameter of the water nozzle.

[0014] The above internal mixing type slit high-speed spray cooling device is applied to the quenching of parts with a slender cavity structure, and the spray speed of the nozzle is 30 m / s - 200 m / s.

[0015] The advantages and positive effects of the internal mixing type slit high-speed spray cooling device and its application described in the present invention are:

[0016] 1. The present invention is provided with a spray pipe, and slit nozzles are evenly arranged on the side wall of the spray pipe. The inner cavity of the workpiece can be cooled through the slit nozzles, which can meet the quenching requirements of workpieces with slender inner cavities.

[0017] 2. The internal spray flow channel of the spray pipe in the present invention has a dumbbell-shaped structure with a large aperture at the end and a small aperture in the middle, so that the gas and cooling water are accelerated and evenly mixed in the spray flow channel, improving the spray speed and spray uniformity.

[0018] 3. Vent pipes are arranged at both ends of the spray pipe in the present invention, and water pipes are arranged on the vent pipes. The water pipes are perpendicular to the vent pipes. The gas and cooling water are mixed at the end of the vent pipe close to the spray pipe and collide with each other in the spray pipe, improving the atomization effect.

[0019] 4. A deflector is arranged on the slit nozzle in the present invention. The deflector holes in the deflector further accelerate the spray and diffuse the spray, so that the spray is evenly sprayed in the inner cavity of the workpiece, improving the cooling uniformity and cooling rate of the workpiece.

[0020] 5. The spray pipe of the present invention has multiple lengths, which can meet the quenching requirements of workpieces with slender cavities of different lengths. The spray pipe is made of high-temperature resistant materials, meeting the quenching requirements of workpieces in high-temperature environments.

[0021] 6. The structure of the spray cooling device of the present invention is simple and easy to use. The connection parts are connected by threads, which are convenient for installation and disassembly.

[0022] 7. The present invention adjusts the temperature and pressure of water and gas as needed according to the data fed back by the temperature sensor and pressure sensor, realizing the intelligent control of the spray cooling device. There is no oil fume and waste liquid discharge during the operation process, which is beneficial to improving the quenching process environment and realizing clean heat treatment.

[0023] The technical solution of the present invention will be further described in detail below through the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structural schematic diagram of the spray cooling device according to an embodiment of the present invention;

[0025] Figure 2 is a cross-sectional structural schematic diagram of the spray cooling device according to an embodiment of the present invention;

[0026] Figure 3 is a top view structural schematic diagram of the spray cooling device according to an embodiment of the present invention;

[0027] Figure 4 is a three-dimensional structural schematic diagram of the spray pipe according to an embodiment of the present invention;

[0028] Figure 5 Schematic longitudinal sectional view of the spray pipe according to an embodiment of the present invention;

[0029] Figure 6 Schematic cross-sectional view of the spray pipe according to an embodiment of the present invention;

[0030] Figure 7 Schematic three-dimensional structure view of the ventilation pipe according to an embodiment of the present invention;

[0031] Figure 8 Schematic three-dimensional structure view of the water pipe according to an embodiment of the present invention;

[0032] Figure 9 Schematic three-dimensional structure view of the check valve according to an embodiment of the present invention;

[0033] Figure 10 Schematic sectional view of the check valve according to an embodiment of the present invention;

[0034] Figure 11 Schematic internal structure view of the check valve according to an embodiment of the present invention;

[0035] Figure 12 Schematic view of the usage state of the spray cooling device according to an embodiment of the present invention.

[0036] Reference numerals

[0037] 1. Spray pipe; 2. Ventilation pipe; 3. Water pipe; 4. Check valve; 5. Slit nozzle; 6. Deflector; 7. Spray flow channel; 8. Water nozzle; 9. Flow guiding hole; 10. Mounting hole; 11. Valve body; 12. Valve cover; 13. Water passing hole; 14. Flange plate; 15. Connecting hole; 16. Valve flap; 17. Valve rod; 18. Mounting seat; 19. Spring. Detailed implementation manners

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention 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 should not be construed as a limitation to the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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 situations.

[0039] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] Embodiment 1

[0041] As Figure 1 、 Figure 2 、 Figure 3 shown. An internal mixing type slit high-speed spray cooling device includes a spray pipe 1, and the spray pipe 1 is made of a high-temperature resistant material to adapt to a high-temperature working environment and ensure the stability and durability of the device. At least one end of the spray pipe 1 is provided with an air pipe 2. In this embodiment, air pipes 2 are provided at both ends of the spray pipe 1, and air is introduced from both ends of the spray pipe 1. The gas drives the liquid to collide and counteract in the spray channel 7, improving the liquid atomization effect. The air pipe 2 is connected to an air pump for introducing gas into the air pipe 2. The air pipe 2 is sleeved outside the spray pipe 1, and the bottom end of the air pipe 2 is threadedly connected to the spray pipe 1. A gas temperature sensor and a gas pressure sensor are provided on the air pipe 2, and both the gas temperature sensor and the gas pressure sensor are electrically connected to a controller. The gas temperature sensor and the gas pressure sensor respectively monitor the temperature and pressure of the gas entering the air pipe 2, and feed back the monitored results to the controller in real time, so as to facilitate adjusting the temperature and pressure of the gas as needed.

[0042] In this embodiment, the outer diameter of the air pipe 2 is 44 mm, the inner diameter is 40 mm, the wall thickness is 2 mm, and the length is 120 mm. The gas temperature sensor and the gas pressure sensor are arranged on the inner wall of the air vent hole 30 mm away from the air inlet end of the air vent hole.

[0043] As Figure 7 、 Figure 8 shown. A water nozzle 8 is provided on the air pipe 2, and the water nozzle 8 is connected to a water pipe 3 through a check valve 4. Two water nozzles 8 are symmetrically arranged on the side wall of the air pipe 2. The water nozzle 8 is 60 mm away from the air inlet end of the air pipe 2. The outer diameter of the water nozzle 8 is 24 mm, the inner diameter is 20 mm, and the wall thickness is 2 mm. The water pipe 3 is connected to a water pump for sending cooling water into the water pipe 3. An installation hole 10 for installing a water temperature sensor and a water pressure sensor is provided on the water pipe 3, and the water temperature sensor and the water pressure sensor are installed inside the water pipe 3. Both the water temperature sensor and the water pressure sensor are electrically connected to the controller. The water temperature sensor and the water pressure sensor are respectively used to monitor the temperature and pressure of the water, and feed back the monitored results to the controller in real time, so as to facilitate adjusting the temperature and pressure of the water as needed.

[0044] Both the air pump and the water pump are electrically connected to the controller. According to the monitoring results of the gas temperature and pressure sensors and the water pressure sensor, the controller adjusts the power of the air pump and the water pump as needed to control the pressure of the gas and the cooling water.

[0045] As Figure 4 、Figure 5 , Figure 6 As shown. Cylindrical connecting pipes are provided at both ends of the spray pipe 1 for connecting with the ventilation pipe 2. The middle part of the spray pipe 1 is in a dumbbell-shaped structure with larger diameters at both ends and a smaller diameter in the middle. A conforming spray flow channel 7 is arranged inside the spray pipe 1. After gas and cooling water enter the spray flow channel 7 through the water pipe 3 and the ventilation pipe 2 respectively, due to the gradually decreasing cross-sectional area of the spray flow channel 7, the gas and cooling water are compressed, increasing the speeds of the gas and cooling water, and the gas and cooling water are fully mixed, improving the flow characteristics of the fluid, reducing the flow resistance, enhancing the mixing efficiency, and improving the uniformity of spraying.

[0046] In this embodiment, the outer diameter of the connecting pipe is 40 mm, the inner diameter is 36 mm, the wall thickness is 2 mm, and the length is 50 mm. The length of the spray pipe 1 is 200 mm, and the radius of curvature is 500 mm.

[0047] The inner diameters at the upper and lower ends of the spray flow channel 7 are 36 mm, the wall thickness is 2 mm, the length is 200 mm, and the radius of curvature is 500 mm.

[0048] A plurality of slit nozzles 5 are arranged on the side wall of the spray pipe 1, and the slit nozzles 5 communicate with the spray flow channel 7. The slit nozzles 5 are evenly distributed on the side wall of the spray pipe 1. The outer ends of the slit nozzles 5 are located on the same circumference, and the inner ends of the slit nozzles 5 are conformingly arranged on the outer wall of the spray pipe 1. The slit nozzles 5 and the spray pipe 1 are set as an integrally formed structure. The sum of the areas of the longitudinal sections of the spray pipe 1 is smaller than the sum of the areas at the entrance of the ventilation pipe 2, so that the water mist is further accelerated when it is ejected from the slit nozzles 5, improving the spraying speed.

[0049] The outer diameters on the upper and lower sides of the slit nozzle 5 are 40 mm, the inner diameter is 36 mm, the thickness is 2 mm, the length is 200 mm, the radius of curvature is 500 mm, and the width is 4 mm.

[0050] A deflector 6 is arranged at the mist outlet end of the slit nozzle 5. The deflector 6 is fixed on the spray pipe 1 through a clamping groove or is an integrally formed structure with the spray pipe 1 and the slit nozzle 5. A deflector hole 9 for ejecting the water mist is arranged on the deflector 6. The deflector 6 is in a cylindrical structure, and the outer diameter of the deflector 6 is 6 mm.

[0051] The mist inlet end of the deflector hole 9 is in a conical structure with a large opening width at the end and a small opening in the middle, so that the water mist entering the deflector hole 9 through the slit nozzle 5 is further accelerated, improving the spraying speed of the water mist. The mist outlet end of the deflector hole 9 is in a flared structure, and the angle of the flared opening is 120°. The flared structure diffuses the sprayed water mist, so that the water mist evenly covers and sprays on the workpiece, improving the uniformity of cooling the workpiece. The width of the narrowest part of the deflector hole 9 is 2 mm.

[0052] As Figure 9, Figure 10 , Figure 11 As shown in Figure 10 and Figure 11 . A check valve 4 is provided on the water pipe 3. The check valve 4 includes a valve body 11. One end of the valve body 11 is fixedly connected to the water nozzle 8 by bolts or welding in a sealed manner. The valve body 11 is made of stainless steel and can withstand water pressure. The other end of the valve body 11 is fixedly provided with a flange plate 14, and a number of connection holes 15 are evenly arranged on the flange plate 14. The valve body 11 is fixedly connected to the water pipe 3 through the connection holes 15 and bolts. A gasket is provided between the flange plate 14 and the water pipe 3 to improve the sealing effect between the check valve 4 and the water pipe 3. Inside the water inlet end of the valve body 11, there is a valve flap 16. A valve stem 17 is fixedly provided at the center of the valve flap 16 and is arranged along the axial direction of the valve body 11. An installation seat 18 is fixedly provided inside the valve body 11, and a through hole for the valve stem 17 to pass through is provided on the installation seat 18. The valve stem 17 is slidably connected to the installation seat 18. A spring 19 is provided between the valve flap 16 and the installation seat 18. The valve flap 16 contacts the inner wall of the valve body 11 under the action of the spring 19 to close the valve body 11 and block the water flow.

[0053] A valve cover 12 is fixedly provided at the water outlet end of the valve body 11. A water passing hole 13 is provided at the center of the valve cover 12, and the water passing hole 13 is located on the axis of the valve body 11. The aperture of the water passing hole 13 is 6 mm. The area of the water passing hole 13 is smaller than the water inlet area of the valve body 11, so that when the cooling water passes through the water passing hole 13, it is further accelerated. The inner diameter of the water passing hole 13 is smaller than the inner diameter of the water nozzle 8, so that the cooling water enters the ventilation pipe 2 dispersedly and is mixed more evenly with the gas in the ventilation pipe 2.

[0054] The flange thickness is 2 mm, the number of installation holes 10 is 8, and the aperture of the installation holes 10 is 3 mm. In this embodiment, the check valve 4 can resist a water pressure of 5 kPa. When the water pressure exceeds 5 kPa, the valve flap 16 compresses the spring 19 and the check valve 4 opens. When the water pressure reaches 10 kPa, the valve flap 16 contacts the installation seat 18 and the check valve 4 opens to the maximum.

[0055] Embodiment 2

[0056] The difference between this embodiment and Embodiment 1 is that: the length of the spray pipe 1 is 400 mm, and the radius of curvature is 2000 mm. The length of the spray flow channel 7 is 400 mm, and the radius of curvature is 2000 mm. The length of the slit nozzle 5 is 400 mm, the radius of curvature is 2000 mm, and the width is 2 mm.

[0057] The outer diameter of the guide plate 6 is 3 mm, and the width of the narrowest part of the guide hole 9 is 1 mm.

[0058] Embodiment 3

[0059] The difference between this embodiment and embodiment 1 is that the length of the spray pipe 1 is 600 mm, and the radius of curvature is 5000 mm. The length of the spray channel 7 is 600 mm, and the radius of curvature is 5000 mm. The length of the slit nozzle 5 is 600 mm, and the radius of curvature is 5000 mm, and the width is 1.33 mm.

[0060] The outer diameter of the guide plate 6 is 2 mm, and the width of the guide hole 9 at its narrowest point is 0.66 mm.

[0061] Application example of internal mixing narrow slit high-speed spray cooling device

[0062] The cavity of the workpiece has a diameter of 80 mm and a depth of 200 mm, and the spray pipe 1 described in Example 1 is used.

[0063] First, the upper air pipe 2 and the upper water pipe 3 are assembled on the spray pipe 1.

[0064] The spray pipe 1 is fixedly connected to the upper ventilation pipe 2 by threads until the guide plate 6 abuts against the ventilation pipe 2, at which time the spray pipe 1 is tightly connected to the ventilation pipe 2. Then the check valve 4 is installed, the check valve 4 is threadedly connected to the water nozzle, and the water pipe 3 is flange-connected to the check valve 4. A water temperature sensor and a water pressure sensor are installed on the upper water pipe 3, and a gas temperature sensor and a gas pressure sensor are installed on the upper ventilation pipe 2. The water temperature sensor, the water pressure sensor, the gas temperature sensor, and the gas pressure sensor are respectively connected to the external controller to monitor the temperature and pressure of the gas and water in real time, and to adjust the spray parameters in real time. Then the external air pump and water pump are respectively threadedly connected to the ventilation pipe 2 and the water pipe 3 until they are tightly connected. Fix the upper connected part at the center of the elongated cavity of the workpiece.

[0065] The ventilation pipe 2 and the water pipe 3 are installed at the lower part of the spray pipe 1.

[0066] Thread the check valve 4 to the lower water nozzle 8 until they are tightly connected. The water pipe 3 is flange-connected to the check valve 4. Thread the spray pipe 1 to the lower ventilation pipe 2 until the guide plate 6 abuts against the ventilation pipe 2. At this time, the spray pipe 1 is tightly connected to the lower ventilation pipe 2. Install a water temperature sensor and a water pressure sensor on the lower water pipe 3, install a gas temperature sensor and a gas pressure sensor on the lower ventilation pipe 2, and connect the water temperature sensor, water pressure sensor, gas temperature sensor, and gas pressure sensor to the external controller respectively. Thread the external air pump and water pump to the lower ventilation pipe 2 and the lower water pipe 3 respectively until they are tightly connected. At this point, the entire device is installed. The schematic diagram of the use status of the spray cooling device is shown as follows Figure 12 shown.

[0067] In engineering examples, the upper and lower water pipes 3, air pipes 2 and check valves 4 can be pre-assembled. During cooling, only by rotating the pre-assembled upper part and the pre-assembled lower part tightly connected to the spray pipe 1 through threads, the controller, air pump and water pump can be connected.

[0068] During cooling, first turn on the upper and lower air pumps simultaneously. After the parameters of the gas temperature sensor and gas pressure sensor in the air pipe 2 are stable, then turn on the water pumps connected to the upper and lower water pipes 3 simultaneously. The gas and water form high-speed spray in the part of the air pipe 2 close to the spray pipe 1 and finally spray out from the slit nozzle 5 to form high-speed and uniform spray, so as to achieve a good cooling effect. The spray speed of the nozzle can reach 100 m / s, and the highest cooling speed can reach 300 °C / min.

[0069] After cooling is completed, unscrew the pre-assembled upper part or the pre-assembled lower part from the spray pipe 1 in the reverse direction and take out the spray pipe 1 from the workpiece cavity.

[0070] According to the different depths of the slender cavity of the workpiece, spray pipes 1 with different lengths are selected for cooling.

[0071] Therefore, by adopting the internal mixing type slit high-speed spray cooling device and application described in the present invention, the problem that the existing spray cooling device has poor quenching quality for parts with slender cavity structures can be solved.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions of the present invention or make equivalent replacements, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An internal mixing type narrow slit high-speed spray cooling device, comprising a spray pipe, characterized in that: One ventilation pipe is arranged at each end of the spray pipe. The ventilation pipe is connected to an air pump. Opposite water pipes are arranged on both sides of the ventilation pipe. The water pipe is connected to a water pump. A check valve is arranged on the water pipe. The air pump and the water pump are both electrically connected to a controller. An atomization flow channel with large pore diameters at both ends and a small pore diameter in the middle is arranged inside the spray pipe. A plurality of slit nozzles are arranged on the side wall of the spray pipe. The slit nozzles are communicated with the atomization flow channel. The slit nozzles are uniformly distributed on the side wall of the spray pipe. The outer ends of the slit nozzles are located on the same circumference. The sum of the cross-sectional areas of the longitudinal section of the spray pipe is smaller than the sum of the cross-sectional areas at the inlet of the ventilation pipe. The check valve comprises a valve body. One end of the valve body is connected to a water nozzle. A valve cover is arranged at the water outlet end of the valve body. A water passing hole is arranged at the center of the valve cover. The area of the water passing hole is smaller than the water inlet area of the valve body. The inner diameter of the water passing hole is smaller than the inner diameter of the water nozzle.

2. The internal mixing type slit high-speed spray cooling device according to claim 1, wherein: The length of the slit nozzle is 200 mm - 600 mm. The inner diameter of the end of the spray pipe is 30 mm - 40 mm. The radius of curvature of the spray pipe is 500 mm - 5000 mm.

3. The internal mixing type slit high-speed spray cooling device according to claim 1, wherein: The length of the atomization flow channel is 200 mm - 600 mm. The radius of curvature of the atomization flow channel is 500 mm - 5000 mm. The width of the atomization flow channel is 1 mm - 5 mm.

4. The internal mixing type narrow slit high-speed spray cooling device according to claim 1, wherein: A deflector is arranged at the fog outlet end of the slit nozzle. The deflector is fixed on the spray pipe. A deflector hole for spraying water mist is arranged on the deflector.

5. The internal mixing type narrow slit high-speed spray cooling device according to claim 4, characterized in that: The fog inlet end of the deflector hole is a conical structure with a large opening width at the end and a small opening width in the middle. The fog outlet end of the deflector hole is a flared structure. The angle of the flared opening is 90° - 150°. The width of the narrowest part of the deflector hole is 0.2 mm - 5 mm.

6. The internal mixing type slit high-speed spray cooling device according to claim 1, characterized in that: A gas temperature sensor and a gas pressure sensor are arranged on the ventilation pipe. The ventilation pipe is sleeved outside the spray pipe. The ventilation pipe is threadedly connected to the spray pipe. The gas temperature sensor and the gas pressure sensor are both electrically connected to the controller.

7. The internal mixing type slit high-speed spray cooling device according to claim 1, wherein: A water nozzle is arranged on the ventilation pipe. The water nozzle is connected to the water pipe through a check valve. Mounting holes for mounting a water temperature sensor and a water pressure sensor are arranged on the water pipe. The water temperature sensor and the water pressure sensor are both electrically connected to the controller.

8. The internal mixing type slit high-speed spray cooling device according to claim 7, wherein: The other end of the valve body is provided with a flange plate. Connecting holes are arranged on the flange plate. The valve body is connected to the water pipe through the connecting holes. A gasket is arranged between the flange plate and the water pipe. A valve flap is arranged inside the water inlet end of the valve body. A valve rod arranged along the axial direction of the valve body is arranged on the valve flap. A mounting seat is fixedly arranged inside the valve body. A through hole for the valve rod to pass through is arranged on the mounting seat. The valve rod is slidably connected to the mounting seat. A spring is arranged between the valve flap and the mounting seat. The valve flap contacts the inner wall of the valve body under the action of the spring.

9. An application of an internal mixing type slit high-speed spray cooling device according to any one of claims 1-8, characterized in that: The internal mixing type slit high-speed spray cooling device is applied to the quenching of parts with a slender cavity structure. The spray speed of the nozzle is 30 m / s - 200 m / s.

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